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Proposing a Novel System for Measuring the Effectiveness of Validating Customers of the Banking System based on the System Dynamics 基于系统动力学的银行系统客户验证有效性衡量新系统提案
Q1 Engineering Pub Date : 2024-07-11 DOI: 10.52783/pst.559
Mojtaba Karamian
This study aims to develop a system for measuring the effectiveness of customer validation in the banking sector using a system dynamics approach. The proposed model illustrates how dynamic systems can optimize and stabilize financial unit operations by considering the interplay of various factors affecting credit risk. Simulation results over a two-year period demonstrate the significant impact of external pressures like sanctions and environmental conditions on the system. By implementing strategic policies and leveraging knowledge management, the study shows how banks can reduce default probabilities, enhance capital returns, and improve overall system quality. The research underscores the importance of preventive measures and efficient resource management in maintaining robust financial processes. Future recommendations include involving more experts, utilizing extensive quantitative data, and incorporating additional sub-parameters for more accurate predictions.DOI: https://doi.org/10.52783/pst.559
本研究旨在利用系统动力学方法,开发一套衡量银行业客户验证有效性的系统。所提出的模型说明了动态系统如何通过考虑影响信贷风险的各种因素的相互作用来优化和稳定金融单位的运营。为期两年的模拟结果表明,制裁和环境条件等外部压力对系统产生了重大影响。通过实施战略政策和利用知识管理,研究显示了银行如何降低违约概率、提高资本回报和改善整体系统质量。研究强调了预防措施和高效资源管理对保持稳健的金融流程的重要性。未来的建议包括让更多的专家参与进来,利用广泛的定量数据,并纳入更多的子参数以进行更准确的预测。DOI: https://doi.org/10.52783/pst.559
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引用次数: 0
Inclusive Teaching: Stressors, Impact of Stress, and Coping Strategies of Teachers in Public Schools 全纳教学:公立学校教师的压力源、压力影响和应对策略
Q1 Engineering Pub Date : 2024-07-10 DOI: 10.52783/pst.555
Elvony P. Casungcad, P. RhasieJane, Gantuangco, Niña M. Montemor, M. LoveFaith, Ricablanca, Archie L. Tangal, Joseph C. Pepito, Reylan Capuno, Honorio C. Añora, Imelda J. Villarin, Randy Mangubat, Emerson D. Peteros, Raymond C. Espina, Veronica O. Calasang
This study examined inclusive education’s stressors, impacts of stress, and coping strategies among 185 teachers recruited through complete enumeration from selected public schools in Mandaue City Division, Cebu, Philippines during the 2023-2024 school year. A descriptive-correlational research design was utilized to investigate relationships between the variables. Data was collected through a validated and structured questionnaire. Analysis of demographic profiles revealed the majority of respondents were female, aged 31-40 years with 6-10 years of experience. Over half were married. Most held some master's degree units, had received prior inclusive education training, and reported awareness of policies pertaining to inclusion. Results showed teachers experienced moderate overall stress from factors like workload, time constraints, disruptive student behaviors, and insufficient resources. Stress manifested occasionally as exhaustion, frustration, and feelings of being overwhelmed. Coping strategies included discussing issues with colleagues/family and engaging in relaxing activities, but were generally less utilized. Pearson r revealed a significant yet weak relationship between stressors and coping strategies. However, the relationship between stress impacts and coping strategies was non-significant. This suggests coping did not effectively mitigate detrimental stress effects. Notably, neither relationship was strong, with stressors more consistently linked to coping than impacts. These findings highlight the need for holistic teacher wellness programs in Mandaue City Division, addressing diverse challenges through targeted interventions like improved working conditions, adaptive skill-building, and various types of career-stage support. A multi-factorial approach considering the local context is needed to strengthen the resilience and retention of teachers within inclusive education long-term. The study validated the importance of optimizing teacher mental health and well-being given inclusion demands through a customized management plan. By systematically addressing educator needs, sustainability of quality inclusive services can be supported.DOI: https://doi.org/10.52783/pst.555
本研究调查了 2023-2024 学年期间从菲律宾宿务曼达韦市分区选定的公立学校中通过全面普查招募的 185 名教师的全纳教育压力源、压力影响和应对策略。研究采用了描述性-相关性研究设计来调查变量之间的关系。数据是通过一份经过验证的结构化问卷收集的。对人口统计学特征的分析表明,大多数受访者为女性,年龄在 31-40 岁之间,有 6-10 年的工作经验。半数以上已婚。大多数人拥有硕士学位,接受过全纳教育培训,并表示了解与全纳教育相关的政策。结果表明,教师们因工作量、时间限制、学生捣乱行为和资源不足等因素而承受了中等程度的总体压力。压力偶尔表现为疲惫、沮丧和不知所措的感觉。应对策略包括与同事/家人讨论问题和参加放松活动,但一般较少使用。Pearson r 显示,压力源与应对策略之间存在显著但微弱的关系。然而,压力影响与应对策略之间的关系并不显著。这表明,应对策略并不能有效减轻压力的有害影响。值得注意的是,两者之间的关系都不强,压力源与应对策略之间的关系比压力影响之间的关系更密切。这些研究结果凸显了在曼达韦市分部开展全面的教师健康计划的必要性,通过有针对性的干预措施,如改善工作条件、培养适应技能和提供各种职业阶段支持,来应对各种挑战。需要采取考虑当地情况的多因素方法,在长期的全纳教育中加强教师的复原力和留任率。这项研究验证了在全纳教育的要求下,通过量身定制的管理计划来优化教师心理健康和福祉的重要性。通过系统地满足教育工作者的需求,可以支持优质全纳服务的可持续性。DOI: https://doi.org/10.52783/pst.555
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引用次数: 0
Inclusive Teachers’ Engagement, Job Satisfaction and Retention in Public Schools of Mandaue City, Cebu 宿务万代市公立学校全纳教师的参与度、工作满意度和留任率
Q1 Engineering Pub Date : 2024-07-10 DOI: 10.52783/pst.554
Analyn P. Arcipe, Alma D. Belocura, Mutya C. Cabrera, Anna Mae, B. Pason, Rona E. Quilaton, Joseph C. Pepito, Reylan Capuno, Honorio C. Añora, Imelda J. Villarin, Randy Mangubat, Emerson D. Peteros, Anabelle T. Pantaleon, Kaitlin Marie, M. Opingo
This study utilized a descriptive correlational approach to examine relationships between teacher profiles, work engagement, job satisfaction, and retention at Public Schools of Mandaue City, Cebu, Philippines. Data was collected through validated surveys of 253 teachers recruited through complete enumeration, assessing demographics, engagement, satisfaction, and retention motivators. Descriptive and inferential statistics were used to analyze relationships between variables. Results showed the majority of respondents were female aged 32-41 years, over half were married with master’s units, and most had 16+ years of teaching experience. Two-thirds received inclusive education training and were aware of policies. Descriptive analysis found work engagement and job satisfaction levels were very high. Retention levels were also very high thanks to good relationships, security, and community acceptance. Statistically significant relationships were observed between work engagement-retention (r=0.436) and job satisfaction-retention (r=0.611). These findings provide empirical support for engagement and satisfaction predicting teacher retention, especially in demanding inclusive environments. A targeted Teacher Satisfaction and Retention Enhancement (TSRE) plan is proposed to directly address variables significantly impacting engagement, satisfaction, and retention based on comprehensive analysis. The TSRE plan recommends tailored initiatives targeting motivational and evaluative constructs, alongside concrete strategies, timelines and intended outcomes to enhance identified determinants of satisfaction and continued employment. By optimizing teacher profiles, job design, learning opportunities, and working conditions, this research aimed to provide Philippine public schools with empirical insights enabling educators to effectively fulfill emerging inclusive responsibilities with quality and resilience against challenges, contributing to stability as education reforms progress nationwide.DOI: https://doi.org/10.52783/pst.554
本研究采用描述性相关方法,对菲律宾宿务曼达韦市公立学校的教师概况、工作投入度、工作满意度和留任率之间的关系进行了研究。研究通过对 253 名教师进行有效调查收集数据,这些教师都是通过全面查点招聘的,调查内容包括人口统计学、工作投入度、满意度和留任动机。采用描述性和推论性统计来分析变量之间的关系。结果显示,大多数受访者为女性,年龄在 32-41 岁之间,一半以上已婚并拥有硕士学位,大多数人拥有 16 年以上的教学经验。三分之二的人接受过全纳教育培训并了解相关政策。描述性分析发现,工作投入度和工作满意度都非常高。由于良好的人际关系、安全感和社区的认可,留任率也非常高。在工作投入--留任(r=0.436)和工作满意度--留任(r=0.611)之间观察到了具有统计学意义的关系。这些研究结果为参与度和满意度预测教师留任率提供了经验支持,尤其是在要求严格的全纳环境中。在综合分析的基础上,提出了有针对性的教师满意度和留任率提升(TSRE)计划,以直接解决对参与度、满意度和留任率有重大影响的变量。提高教师满意度和留任率(TSRE)计划建议采取有针对性的措施,以激励和评价结构为目标,同时制定具体的战略、时间表和预期成果,以提高已确定的满意度和持续就业的决定因素。本研究旨在通过优化教师简介、工作设计、学习机会和工作条件,为菲律宾公立学校提供经验性见解,使教育工作者能够有效履行新出现的全纳责任,提高质量和应对挑战的能力,从而在全国教育改革的进程中促进稳定。DOI: https://doi.org/10.52783/pst.554
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引用次数: 0
Examining the Application of Deep LSTM Neural Networks in Steganography of Textual Information in Digital Images 探讨深度 LSTM 神经网络在数字图像文本信息隐写术中的应用
Q1 Engineering Pub Date : 2024-07-09 DOI: 10.52783/pst.550
Mohammad Ali Yasmifar, Sattar Mirzakuchaki, Mohammad Norouzi3
Information security has emerged as a critical concern alongside the development of multimedia technology. Among the myriad security challenges, the secure transmission of sensitive information between parties has become a focal point of researchers. Encryption, involving mathematical techniques to ensure data security, is explored in this study. Specifically, the application of deep LSTM neural networks in concealing textual information within digital images is investigated. The approach involves embedding one image within another in a manner that prevents detection of the hidden image within the cover image, while textual content is covertly embedded within the image. The proposed method demonstrates superior performance based on three evaluation metrics—Peak Signal-to-Noise Ratio (PSNR) in decibels, Mean Squared Error (MSE), and accuracy rate in percentage—compared to three other benchmark images (lena.png, peppers.png, mandril.png, and monkey.png), achieving values of 93.665275 dB, 0.6945 MSE, and 97.23% accuracy, respectively.
随着多媒体技术的发展,信息安全已成为人们关注的一个重要问题。在众多安全挑战中,各方之间敏感信息的安全传输已成为研究人员关注的焦点。本研究探讨了涉及数学技术的加密技术,以确保数据安全。具体来说,研究了深度 LSTM 神经网络在数字图像中隐藏文本信息的应用。这种方法是将一张图像嵌入另一张图像,以防止在封面图像中检测到隐藏图像,同时在图像中隐蔽地嵌入文本内容。与其他三张基准图像(lina.png、peppers.png、mandril.png 和 monkey.png)相比,所提出的方法在三个评估指标(以分贝为单位的峰值信噪比 (PSNR)、以百分比为单位的平均平方误差 (MSE) 和准确率)上表现出卓越的性能,分别达到 93.665275 dB、0.6945 MSE 和 97.23% 的准确率。
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引用次数: 0
[Interaction Effects of Vegetation and Soil Factors on Microbial Communities in Alpine Steppe Under Degradation]. [植被和土壤因子对退化的阿尔卑斯草原微生物群落的交互影响]。
Q2 Environmental Science Pub Date : 2024-07-08 DOI: 10.13227/j.hjkx.202307217
Huan Xu, Ming-Jun Ding, Hua Zhang, Yue-Ju Zhang, Peng Huang, Yu-Ping Wu, Tian-E Zou, Neng-Yu Wang, Huan Zeng

To clarify the regulating effect of vegetation and soil factors on microbial communities in the alpine steppe under degradation on the Qinghai-Xizang Plateau, the alpine steppe in the Sanjiangyuan area of the Qinghai-Tibet Plateau was chosen. We analyzed the differences in vegetation and soil factors in different stages of degradation (non-degradation, moderate degradation, and severe degradation) and detected the variations in microbial community characteristics in the alpine steppe under different degradation stages using high-throughput sequencing technology. Eventually, redundancy analysis (RDA) and multiple regression matrixes (MRM) based on the similarity or dissimilarity matrix were used to identify key environmental factors regulating microbial (bacterial and fungal) community changes under degradation. The results showed that the degradation of the alpine steppe significantly changed the community coverage, height, biomass, and important value of graminae; significantly reduced the contents of soil organic matter, total nitrogen, total phosphorus, and silt; and increased the soil bulk density and sand content. Degradation did not change the composition of bacteria and fungi, but their composition proportions changed and also resulted in the loss of microbial richness (Chao1 index and Richness index) but did not significantly change the microbial diversity (Shannon index). With the occurrence of degradation, the vegetation characteristics, soil physicochemical properties, and microbial diversity showed a consistent change trend. Combined with the characteristics of the network topology changes (the number of nodes and clustering coefficient significantly decreased), it was found that degradation of the alpine steppe led to the decline of interspecies interactions, decentralization of network, and homogenization of microorganisms, but the cooperation relations among the species were maintained (positive correlation connections accounted for more than 90% in all degradation stages). Under the alpine steppe degradation, the vegetation-soil interaction had the greatest effect on soil bacterial community, whereas soil physicochemical properties had the greatest influence on soil fungal community. Specifically, vegetation community height, biomass, and soil bulk density were the mutual factors regulating soil microorganisms, whereas the vegetation Simpson index, important value of graminae, soil total phosphorus, total potassium, and silt content were the unique factors affecting the soil bacterial community, and soil pH and total nitrogen content were the particular factors affecting the soil fungal community.

为了阐明植被和土壤因子对青藏高原退化高寒草原微生物群落的调控作用,我们选择了青藏高原三江源地区的高寒草原。我们分析了不同退化阶段(未退化、中度退化和严重退化)植被和土壤因子的差异,并检测了微生物群落的变化。并利用高通量测序技术检测了不同退化阶段高寒草原微生物群落特征的变化。最后,利用冗余分析(RDA)和多元回归矩阵(MRM)最终,利用冗余分析(RDA)和基于相似性或不相似性矩阵的多元回归矩阵(MRM),确定了降解过程中调控微生物(细菌和真菌)群落变化的关键环境因素。群落变化的关键环境因素。结果表明,高寒草原退化显著改变了群落覆盖度、高度、生物量和禾本科植物的重要价值;显著降低了土壤有机质、全氮、全磷和淤泥的含量;增加了土壤容重和含沙量。降解并没有改变细菌和真菌的组成,但它们的组成比例发生了变化,同时也导致了微生物丰富度(Chao1 指数和丰富度指数)的降低。但微生物多样性(Shannon 指数)没有发生明显变化。随着退化的发生,植被特征、土壤理化性质和微生物多样性呈现出一致的变化趋势。结合网络拓扑结构的变化特征(节点数和聚类系数显著下降),发现高寒草原退化导致物种间相互作用下降、网络分散化和微生物同质化,但物种间的合作关系保持不变(正相关联系在退化各阶段均占90%以上)。在高寒草原退化过程中,植被-土壤相互作用对土壤细菌群落的影响最大,而土壤理化性质对土壤真菌群落的影响最大。具体而言,植被群落高度、生物量和土壤容重是调节土壤微生物的相互因子,植被辛普森指数、禾本科重要值、土壤全磷、全钾和淤泥含量是影响土壤细菌群落的独特因子,土壤pH值和全氮含量是影响土壤真菌群落的特殊因子。
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引用次数: 0
[Immobilization of Heavy Metals by Phosphorus-solubilizing Bacteria and Inhibition of Cd and Pb Uptake by Wheat]. [磷溶解细菌对重金属的固定化及抑制小麦对镉和铅的吸收]。
Q2 Environmental Science Pub Date : 2024-07-08 DOI: 10.13227/j.hjkx.202308206
Nan-Nan Su, Qing-Zhao Zhao, Fang Wang, Tian-Ci An, Jing-Jing Niu, Jia-Xin Yan, Jian-Jun Yang, Hui Han

Phosphorus-solubilizing microorganisms convert insoluble phosphorus in the soil into phosphorus that can be absorbed by plants. Soluble phosphate combines with heavy metals to form precipitation, reducing the content of available heavy metals, thereby reducing the absorption of heavy metals by crops, which plays an important role in the remediation of heavy metal-contaminated soil. The effects of the immobilization of Cd and Pb and the release of PO43- by the phosphorus-solubilizing bacterium Klebsiella sp. M2 were studied through solution culture experiments. In addition, the effects of strain M2 on wheat uptake of Cd and Pb and its microbiological mechanism were also explored through pot experiments. The results showed that strain M2 reduced the concentrations of Cd and Pb and increased the concentration of PO43- in the solution through cell wall adsorption and induced phosphate precipitation. Pot experiments showed that compared to those in the CK group and inactivated strain M2 group, inoculation with live strain M2 significantly increased (123%-293%) the contents of Ca2-P and Ca8-P in rhizosphere soil, decreased the content of DTPA-Cd (34.48%) and DTPA-Pb (36.72%) in wheat rhizosphere soil, and thus hindered the accumulation of Cd and Pb in wheat grains. Moreover, high-throughput sequencing results showed that strain M2 significantly increased the diversity of wheat rhizosphere bacterial communities; increased the relative abundance of Proteobacteria, Gemmatimonadetes, and Bacteroidota in wheat rhizosphere soil; and increased the proportion of heavy metal-immobilizing and phosphorus-promoting bacteria in wheat rhizosphere soil (mainly Sphingomonas, Nocardioides, Bacillus, Gemmatimonas, and Enterobacter). These bacterial genera played an important role in immobilizing heavy metals and preventing wheat from absorbing heavy metals. These results provide bacterial resources and theoretical basis for the bioremediation of heavy metal-contaminated farmland.

磷溶解微生物可将土壤中的不溶性磷转化为植物可吸收的磷。可溶性磷酸盐与重金属结合形成沉淀,降低了可利用重金属的含量,从而减少了农作物对重金属的吸收,这在重金属污染土壤的修复中发挥了重要作用。通过溶液培养实验,研究了磷溶解菌克雷伯氏菌 M2 对 Cd 和 Pb 的固定作用以及 PO43- 的释放效果。此外,还通过盆栽实验探讨了菌株 M2 对小麦吸收镉和铅的影响及其微生物机制。结果表明,菌株 M2 通过细胞壁吸附和诱导磷酸盐沉淀,降低了溶液中 Cd 和 Pb 的浓度,增加了 PO43- 的浓度。盆栽实验表明,与 CK 组和灭活菌株 M2 组相比,接种活菌株 M2 能显著提高(123%-293%)Ca2-P 和 Ca2-P 的含量。接种活菌株 M2 后,根瘤土壤中 Ca2-P 和 Ca8-P 的含量明显增加(123%-293%),DTPA-镉(34.48%)和 DTPA-Pb和 DTPA-Pb 的含量(36.72%)。从而阻碍了小麦籽粒中镉和铅的积累。此外,高通量测序结果表明,菌株M2显著增加了小麦根瘤菌群落的多样性;提高了小麦根瘤菌群落中变形菌、革囊菌和类杆菌的相对丰度、并增加了小麦根圈土壤中重金属固定菌和促磷菌的比例(主要是鞘氨单胞菌(Sphingomonas)、脐带菌(Nocardioides)、芽孢杆菌(Bacillus)、革囊单胞菌(Gemmatimonas)和肠杆菌(Enterobacter))。这些细菌属在固定重金属和防止小麦吸收重金属方面发挥了重要作用。这些结果为重金属污染农田的生物修复提供了细菌资源和理论依据。
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引用次数: 0
[Effects of Different Microbial Fertilizers on Soil Quality and Maize Yield in Coastal Saline Soil]. [不同微生物肥料对沿海盐碱地土壤质量和玉米产量的影响]。
Q2 Environmental Science Pub Date : 2024-07-08 DOI: 10.13227/j.hjkx.202307148
Jing Ye, Ying Chen, Shuang Qu, Wen-Chao Zhao

Microbial fertilizers have the characteristics of high efficiency and environmental protection in improving saline soils, and the application of functional microbial fertilizers is of great significance for the green abatement of saline barriers and the improvement of soil quality in coastal areas. The experiment was based on moderately saline soil in the coastal area of Hebei Province, with corn as the indicator crop, on the basis of conventional chemical fertilizer application. Different microbial fertilizer treatments, namely, T1 (conventional chemical fertilizer 750 kg·hm-2 + compound microbial agent 75 kg·hm-2), T2 (conventional chemical fertilizer 750 kg·hm-2 + Bacillus megaterium 300 kg·hm-2), T3 (conventional chemical fertilizer 750 kg·hm-2 + B. mucilaginosus 300 kg·hm-2), T4 (conventional chemical fertilizer 750 kg·hm-2 + organic silicon fertilizer 600 kg·hm-2), T5 (conventional chemical fertilizer 750 kg·hm-2 + bio-organic fertilizer 600 kg·hm-2), T6 (conventional fertilizer 750 kg·hm-2 + active microalgae 15 kg·hm-2), and CK (only fertilizer 750 kg·hm-2), were used for these seven treatments, to study the effects of different microbial fertilizers on soil nutrients, salinity, bacterial community, and corn yield and economic efficiency during two critical periods (V12 stage and maturity stage) of corn. The results showed that compared with that in CK, T1 significantly increased soil total nitrogen (TN) and available phosphorus (AP) contents during the whole growth period. Over the whole reproductive period, soil organic matter (OM) at maturity increased by 10.35% over the V12 stage compared to that in CK, but there was no significant difference between treatments. Compared with that in CK, T5 and T6 significantly reduced soil total salinity and Ca2+ content during the whole growth period by an average of 14.51%-18.48% and 24.25%-25.51%. T1 significantly increased the bacterial diversity index over the whole growth period by 45.16% compared to that in CK. The dominant soil phyla were Actinobacteria, Proteobacteria, Acidobacteria, and Chloroflexi, and the dominant genera were Bacillus and Geminicoccaceae. The most abundant functions of the bacterial community in the study area were chemoheterotrophy and aerobic chemoheterotrophy, with average relative abundances of 28.89% and 27.11%, and T3 and T6 significantly improved soil N cycling function. The results of redundancy analysis (RDA) indicated that Na+, SO42-, pH, and EC were important factors driving the structure of the bacterial community, and correlation heatmaps showed that Na+, SO42-, pH, and EC were significantly and positively correlated mainly with the phylum Planctomycetota, whereas soil OM and TN were significantly and positive

微生物肥料在改良盐碱土方面具有高效、环保的特点,施用功能性微生物肥料对绿色消减盐碱障碍、改善沿海地区土壤质量具有重要意义。该试验以河北省沿海地区中度盐碱土壤为研究对象,以玉米为指示作物,在常规施用化肥的基础上,采用不同的微生物肥料处理方法对盐碱土壤进行了研究。不同的微生物肥料处理,即T1(常规化肥750 kg-hm-2+复合微生物菌剂75 kg-hm-2)、T2(常规化肥750 kg-hm-2+巨大芽孢杆菌300 kg-hm-2)、T3(常规化肥750 kg-hm-2+粘杆菌300 kg-hm-2)、T4(常规化肥750 kg-hm-2+复合微生物菌剂75 kg-hm-2)和T5(常规化肥750 kg-hm-2+巨大芽孢杆菌300 kg-hm-2)。粘杆菌 300 kg-hm-2),T4(常规化肥 750 kg-hm-2 + 有机硅肥 600 kg-hm-2)、T5(常规化肥 750 kg-hm-2+生物有机肥 600 kg-hm-2),T6(常规化肥 750 kg-hm-2+活性微藻 15 kg-hm-2)、和 CK(单肥 750 kg-hm-2)七个处理,研究不同微生物肥料对玉米两个关键时期(V12 期和成熟期)土壤养分、盐分、细菌群落以及玉米产量和经济效益的影响。玉米产量和经济效益的影响。结果表明,与 CK 相比,T1 显著增加了土壤全氮(TN)和可利用磷(AP)和可利用磷(AP)含量。在整个生育期,土壤有机质(OM)比 CK 增加了 10.35%,但处理间差异不明显。与 CK 相比,T5 和 T6 显著降低了整个生长期的土壤总盐分和 Ca2+ 含量,平均降幅为 14.51%-18.48%和 24.25%-25.51%。在整个生长期间,T1 的细菌多样性指数比 CK 明显提高了 45.16%。土壤中的优势菌门为放线菌门、蛋白菌门、酸性菌门和绿杆菌门,优势菌属为芽孢杆菌属和革米球菌属。研究区细菌群落最丰富的功能是化合营养和需氧化合营养,平均相对丰度分别为28.89%和27.11%,T3和T6显著提高了土壤氮循环功能。冗余分析结果(RDA)相关热图显示,Na+、SO42-、pH和EC主要与拟杆菌门呈显著正相关,而土壤OM和TN则与蓝藻门呈显著正相关。与 CK 相比,T6 增加了蓝藻的相对丰度,优化了整个生长期的细菌群落结构。使用推荐剂量的菌肥 T1 和 T6 可使玉米产量分别提高 7.31%-24.83% 和经济效益提高 9.05%-23.23% 。土壤化学性质与产量相关性分析的初步结果显示,EC、AP、HCO3- 和 Mg2+ 是限制沿海地区土壤生产力的障碍因素。总之,使用复合菌剂(T1)和活性微藻(T6)按推荐剂量使用可显著提高土壤养分、降低盐碱度、改善土壤细菌群落结构多样性,不仅能确保玉米增产增效,还能实现微生物肥料的高效利用和土壤质量的改善。
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引用次数: 0
[Evolution of Physical and Chemical Characteristics of Atmospheric Precipitation and Its Significant Impacts on the Environment in Beijing]. [北京大气降水理化特征演变及其对环境的重大影响]。
Q2 Environmental Science Pub Date : 2024-07-08 DOI: 10.13227/j.hjkx.202307273
Li-Hui Han, Qian Xiao, Xue-Mei Yang, Chao-Nan Qi, Jian Tian, Tong Lan, Shui-Yuan Cheng, Ai-Hua Zheng, Jing-Hua Guo

Atmospheric precipitation samples were collected in 2018, 2019, and 2021 in Beijing to study the concentrations and changes of the main metal elements and water-soluble ions; the wet deposition fluxes of heavy metals, water-soluble ions, dissolved inorganic nitrogen, and sulfur in the atmospheric precipitation and their impacts on the ecological environment; and the scavenging mechanisms of the typical precipitation to atmospheric pollutants during the study period. The results showed that the precipitation in Beijing during the study period was mostly neutral or alkaline, and the frequency of acid rain occurrence was very low, only accounting for 3.06%. The total concentrations of major metal elements in 2018, 2019, and 2021 were (4 787.46 ±4 704.31), (7 663.07 ±8 395.05), and (2 629.13 ±2 369.51) μg·L-1, respectively. The total equivalent concentrations of ions in 2018, 2019, and 2021 were (851.68 ±649.16), (973.98 ±850.94), and (644.31 ±531.16) μeq·L-1, respectively. The interannual changes in major metal elements and ions followed the order of 2019 > 2018 > 2021. The seasonal average total concentrations of major metal elements in spring, summer, autumn, and winter were (9 624.25 ±7 327.92), (4 088.67 ±5 710.14), (3 357.68 ±3 995.64), and (6 203.19 ±3 857.43) μg·L-1, respectively, and the seasonal average total equivalent concentrations of ions in spring, summer, autumn, and winter were (1 014.71 ±512.21), (729.83 ±589.90), (724.35 ±681.40), and (1 014.03 ±359.67) μeq·L-1, respectively, all presenting the order of spring > winter > summer > autumn. NO3- and SO42- were the main acid-causing ions in precipitation, whereas NH4+ and Ca2+ were the main acid-neutralizing ions. The wet deposition fluxes of the heavy metal Cd were very low [(0.05 ±0.01) mg·(m2·a)-1], only accounting for (0.13 ±0.04)% of the total wet deposition fluxes of main metal elements; however, its soil safety years were 291 years, significantly lower than those of other heavy metals, displaying that its ecological risk was relatively the highest. The total wet precipitation flux of water-soluble ions NH4+, Ca2+, NO3-, and SO42- accounted for (85.72 ±2.18)% of the wet precipitation flux of total ions, suggesting that their comprehensive impact on the ecological environment might have been higher. DIN wet deposition flux was mainly characterized by NH4+-N, which had a positive impact on the ecological environment in summer. SO42--S wet deposition flux was higher in summer, so its positive impact on the ecological environment was also greater. The scavenging effects of atmospheric precipitations to pollutants from the air were impacted by various factors, and the synergism effects of these factors co

分别于2018年、2019年和2021年在北京市采集了大气降水样品,研究了研究期间大气降水中主要金属元素和水溶性离子的浓度及其变化;大气降水中重金属、水溶性离子、溶解性无机氮和硫的湿沉降通量及其对生态环境的影响;以及典型降水对大气污染物的清除机制。结果表明,研究期间北京降水多为中性或碱性,酸雨发生频率很低,仅占 3.06%。2018 年、2019 年和 2021 年主要金属元素的总浓度分别为(4 787.46 ±4 704.31)、(7 663.07 ±8 395.05)和(2 629.13 ±2 369.51)。μg-L-1。2018 年、2019 年和 2021 年的离子总当量浓度分别为(851.68 ±649.16)、(973.98 ±850.94)和(644.31 ±531.16)μeq-L-1。μeq-L-1。主要金属元素和离子的年际变化顺序为 2019 > 2018 > 2021。春季、夏季、秋季和冬季主要金属元素的季节平均总浓度分别为(9 624.25 ±7 327.92)、(4 088.67 ±5 710.14)、(3 357.68 ±3 995.64)和(6 203.19 ±3 857.43)。μg-L-1,春、夏、秋、冬四季平均离子总当量浓度分别为(1 014.71 ±512.21)、(729.83 ±589.90)、(724.35 ±681.40)和(1 014.03 ±359.67)μeq-L-1。分别为(1 014 03 ±359.67)、(724 35 ±681.40)和(1 014 03 ±359.67)μeq-L-1,均呈春、冬、夏、秋顺序排列。NO3-和SO42-是降水中主要的致酸离子,而NH4+和Ca2+则是主要的中和酸离子。重金属镉的湿沉降通量非常低[(0.05 ±0.01)mg-(m2-a)-1],仅占降水量的(0.13 ±0.04)%。04)%;但其土壤安全年为 291 年,明显低于其他重金属,表明其生态风险相对最高。水溶性离子NH4+、Ca2+、NO3-和SO42-的湿沉降通量占总离子湿沉降通量的(85.72±2.18)%,表明其对生态环境的综合影响可能更大。DIN湿沉降通量以NH4+-N为主,对夏季生态环境有积极影响。SO42--S湿沉降通量在夏季较高,因此其对生态环境的积极影响也较大。大气降水对空气中污染物的清除作用受到多种因素的影响,这些因素的协同效应会直接影响降水对污染物的清除机制。
{"title":"[Evolution of Physical and Chemical Characteristics of Atmospheric Precipitation and Its Significant Impacts on the Environment in Beijing].","authors":"Li-Hui Han, Qian Xiao, Xue-Mei Yang, Chao-Nan Qi, Jian Tian, Tong Lan, Shui-Yuan Cheng, Ai-Hua Zheng, Jing-Hua Guo","doi":"10.13227/j.hjkx.202307273","DOIUrl":"https://doi.org/10.13227/j.hjkx.202307273","url":null,"abstract":"<p><p>Atmospheric precipitation samples were collected in 2018, 2019, and 2021 in Beijing to study the concentrations and changes of the main metal elements and water-soluble ions; the wet deposition fluxes of heavy metals, water-soluble ions, dissolved inorganic nitrogen, and sulfur in the atmospheric precipitation and their impacts on the ecological environment; and the scavenging mechanisms of the typical precipitation to atmospheric pollutants during the study period. The results showed that the precipitation in Beijing during the study period was mostly neutral or alkaline, and the frequency of acid rain occurrence was very low, only accounting for 3.06%. The total concentrations of major metal elements in 2018, 2019, and 2021 were (4 787.46 ±4 704.31), (7 663.07 ±8 395.05), and (2 629.13 ±2 369.51) μg·L<sup>-1</sup>, respectively. The total equivalent concentrations of ions in 2018, 2019, and 2021 were (851.68 ±649.16), (973.98 ±850.94), and (644.31 ±531.16) μeq·L<sup>-1</sup>, respectively. The interannual changes in major metal elements and ions followed the order of 2019 &gt; 2018 &gt; 2021. The seasonal average total concentrations of major metal elements in spring, summer, autumn, and winter were (9 624.25 ±7 327.92), (4 088.67 ±5 710.14), (3 357.68 ±3 995.64), and (6 203.19 ±3 857.43) μg·L<sup>-1</sup>, respectively, and the seasonal average total equivalent concentrations of ions in spring, summer, autumn, and winter were (1 014.71 ±512.21), (729.83 ±589.90), (724.35 ±681.40), and (1 014.03 ±359.67) μeq·L<sup>-1</sup>, respectively, all presenting the order of spring &gt; winter &gt; summer &gt; autumn. NO<sub>3</sub><sup>-</sup> and SO<sub>4</sub><sup>2-</sup> were the main acid-causing ions in precipitation, whereas NH<sub>4</sub><sup>+</sup> and Ca<sup>2+</sup> were the main acid-neutralizing ions. The wet deposition fluxes of the heavy metal Cd were very low [(0.05 ±0.01) mg·(m<sup>2</sup>·a)<sup>-1</sup>], only accounting for (0.13 ±0.04)% of the total wet deposition fluxes of main metal elements; however, its soil safety years were 291 years, significantly lower than those of other heavy metals, displaying that its ecological risk was relatively the highest. The total wet precipitation flux of water-soluble ions NH<sub>4</sub><sup>+</sup>, Ca<sup>2+</sup>, NO<sub>3</sub><sup>-</sup>, and SO<sub>4</sub><sup>2-</sup> accounted for (85.72 ±2.18)% of the wet precipitation flux of total ions, suggesting that their comprehensive impact on the ecological environment might have been higher. DIN wet deposition flux was mainly characterized by NH<sub>4</sub><sup>+</sup>-N, which had a positive impact on the ecological environment in summer. SO<sub>4</sub><sup>2-</sup>-S wet deposition flux was higher in summer, so its positive impact on the ecological environment was also greater. The scavenging effects of atmospheric precipitations to pollutants from the air were impacted by various factors, and the synergism effects of these factors co","PeriodicalId":35937,"journal":{"name":"Huanjing Kexue/Environmental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141634773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
[Occurrence and Distribution of Potential Dangerous Biological Agents in Beijing Suburban Rivers]. [北京郊区河流中潜在危险生物制剂的出现与分布]。
Q2 Environmental Science Pub Date : 2024-07-08 DOI: 10.13227/j.hjkx.202307049
Yun-Wei Cui, Yuan Xin, Yao-Fang Zhang, Lei Li, Zhi-Han Ye, Yuan-Song Wei, Jun-Ya Zhang

Dangerous biological agents (DBAs) refer to microorganisms, toxins, and other biological substances that have the potential to cause significant harm to humans, animals, plants, and the environment. They are the primary target of the prevention and response in China's Biosafety Law, and it is of great importance to clarify the characteristics of DBAs in the Beijing suburban rivers for the insurance of the water safety in Beijing. The typical Beijing suburban rivers (Mangniu River, Chaohe River, and Baihe River) were selected, and the occurrence and distribution of DBAs concerning the molecular biology composition as the nucleic acid (antibiotic resistance genes, ARGs), nucleic acid and proteins (viruses), and intact cellular structures (pathogens) were determined based on the metagenomics. The results showed that there was a high abundance of multidrug-resistant ARGs in the water and substrates of the urban river; on average, they made up 74.11% ±6.82% of the total, and the abundance of aminoglycoside and MLS (macrolide-lincosamide-streptomycin)-resistant ARGs was the highest, but the predominant subtypes of ARGs were of low risk and had limited transmission potential. The viruses in the tributary mainly belonged to the phages, most of which were Kyanoviridae and Peduoviridae, with averages of 16.98% ±8.44% and 16.19% ±10.79%, respectively. Eukaryotic viral populations consisted mainly of members from the Mimiviridae and Phycodnaviridae families, with averages of 10.37% ±12.68% and 8.34% ±6.97%, respectively, whereas there were few viruses related to human and animal diseases. The pathogenic bacteria mainly contained Neisseria meningitidis, Brucella suis, Salmonella enterica, and Burkholderia pseudomalle, with averages of 19.17% ±3.63%, 12.76% ±2.88%, 11.22% ±1.95%, and 8.26% ±1.84%, respectively. The composition and abundance of pathogenic bacteria varied significantly among different tributaries and locations, possibly owing to water quality, pollution sources, environmental factors, and human activities. These findings can provide data support for the water safety management and biological risk control of Beijing suburban rivers.

危险生物制剂(DBAs)是指可能对人类、动物、植物和环境造成重大危害的微生物、毒素和其他生物物质。它们是我国《生物安全法》规定的主要预防和应对对象,明确京郊河流中 DBAs 的特征对保障北京的水安全具有重要意义。本研究选取了典型的京郊河流(望牛河、潮河和白河),对其DBAs的发生和分布情况进行了调查。选取了典型的京郊河流(望牛河、潮河、白河),通过元基因组学方法确定了DBAs的发生和分布,涉及核酸(抗生素耐药基因、ARGs)、核酸和蛋白质(病毒)、完整细胞结构(病原体)等分子生物学组成。根据元基因组学确定了这些物质。结果表明,城市河道水体和底质中耐多药的ARGs含量较高,平均占总数的74.11%±6.82%,其中氨基糖苷类和MLS(马可利-林可酰胺-链霉素)耐药ARGs含量最高,但主要的ARGs亚型风险较低,传播潜力有限。支流中的病毒主要属于噬菌体,其中大部分为 Kyanoviridae 和 Peduoviridae,平均比例分别为 16.98% ±8.44% 和 16.19% ±10.79%。真核病毒种群主要由 Mimiviridae 和 Phycodnaviridae 科的成员组成,平均比例分别为 10.37% ±12.68% 和 8.34% ±6.97%,而与人类和动物疾病相关的病毒很少。病原菌主要包括脑膜炎奈瑟氏菌、猪布鲁氏菌、肠炎沙门氏菌和假马勒伯克霍尔德氏菌,平均含量分别为 19.17% ±3.63%、12.76% ±2.88%、11.22% ±1.95%和 8.26% ±1.84%。可能由于水质、污染源、环境因素和人类活动等原因,不同支流和地点的致病菌组成和数量差异显著。这些研究结果可为京郊河流的水质安全管理和生物风险控制提供数据支持。
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引用次数: 0
[Xiaojiang River Basin Ecological Environmental Quality Spatiotemporal Pattern and Evolutionary Trend Analysis Using GEE from 1990 to 2022]. [小江流域生态环境质量时空格局及演变趋势分析(1990-2022 年)]。
Q2 Environmental Science Pub Date : 2024-07-08 DOI: 10.13227/j.hjkx.202308061
Hui-Lin Zong, Xiao-Lun Zhang, Xi-Ping Yuan, Jie Lü, Ming-Long Yang, Shu Gan

Assessment and monitoring of the quality of the ecological environment in the area is a very important fundamental task in the development of ecological civilization in the Xiaojiang River Basin in Yunnan Province, which serves as a demonstration area for ecological restoration in the upper reaches of the Yangtze River. The Landsat remote sensing images from 1990, 1995, 2000, 2005, 2010, 2014, 2018, and 2022 were chosen, and the four indexes of greenness (NDMVI), humidity (WET), dryness (NDBSI), and heat (LST) were extracted. The remote sensing ecological index (RSEI) was created using the principal component analysis method, then the spatial and temporal patterns and trends of ecological quality in the Xiaojiang River Basin between 1990 and 2022 were examined using the GEE platform, ArcGIS 10.7 platform, and Python platform, combining the analysis methods of geographic information mapping, coefficient of variation, Mann-Kendall trend test, Sen's slope estimation, and Hurst's index. The findings demonstrated that: ① the ecological quality of the study area had more obvious geographic differentiation spatially, and by 2022, the areas with excellent and good ecological quality grades were primarily distributed in the areas with better alpine vegetation cover, and those with poor ecological quality were primarily distributed in the areas of the mudslide ravines with relatively low terrain. On a time scale, the study area's RSEI index increased from 0.41 in 1990 to 0.55 in 2022, with a fluctuating overall trend of ecological quality improvement and an average increase of 0.048(10 a) -1; this progress was directly related to a number of ecological construction initiatives that have been energetically carried out, such as converting farms to forests, preventing mudslides, saving soil and water, managing heavy metal contamination, etc. ② The RSEI was more appropriate for the evaluation of ecological quality in alpine ravine areas because, in comparison to the NDVI index, the NDVMI adopted in this study was more sensitive to vegetation information in topographic undulation areas, especially in shaded areas, and could more accurately and quantitatively describe the vegetation information. ③ The RSEI in the Xiaojiang River Basin had a mean coefficient of variation of 0.202. Overall, its volatility was low, and its high volatility was mostly concentrated in the mudslide gully area along both sides of the Xiaojiang River fracture zone, where the surface was made up of bare rocks and sediment that was easily impacted by the changing of the seasons, the climate, and human activity. ④ The quality of the ecological environment in the region was significantly improving, with the rising area reaching 85.72% of the total area and the declining area accounting for approximately 10.15% of the total area. The future trend of change will be dominated by ongoing improvement and future degradation, accounting for 44.75% and 39.97%, respectively. It is im

作为长江上游生态修复示范区的云南省小江流域,区域生态环境质量评估与监测是生态文明建设中一项十分重要的基础性工作。选取1990年、1995年、2000年、2005年、2010年、2014年、2018年和2022年的Landsat遥感影像,提取绿度(NDMVI)、湿度(WET)、干度(NDBSI)和热量(LST)四项指标。进行了提取。遥感生态指数(RSEI)然后利用 GEE 平台、ArcGIS 10.7 平台和 Python 平台,结合地理信息制图、变异系数、Mann-Kendall 趋势检验、Sen 斜率估计和 Hurst 指数等分析方法,研究了小江流域 1990-2022 年生态质量的时空格局和变化趋势。研究结果表明:①研究区生态质量在空间上具有较明显的地域分异,到 2022 年,生态质量等级为优、良的区域主要分布在高山植被覆盖较好的区域,生态质量等级为差的区域主要分布在地势相对较低的泥石流沟谷区域。从时间尺度上看,研究区的 RSEI 指数从 1990 年的 0.41 上升到 2022 年的 0.55,生态质量总体呈波动改善趋势,平均上升了 0.048(10 a)-1;这与大力开展退耕还林、泥石流防治、水土保持、重金属污染治理等生态建设有直接关系。与 NDVI 指数相比,本研究采用的 NDVMI 指数对地形起伏区,尤其是阴影区的植被信息更为敏感,能更准确地定量描述植被信息,因此 RSEI 更适合评价高寒峡谷地区的生态质量。小江流域 RSEI 的平均变异系数为 0.202。小江流域的 RSEI 平均变异系数为 0.202,总体上波动性较小,波动性较大的区域主要集中在小江断裂带两侧的泥石流沟区域,地表由裸露的岩石和沉积物构成,容易受到季节变化、气候和人类活动的影响。区域生态环境质量明显改善,上升面积占总面积的 85.72%,下降面积约占总面积的 10.15%。未来变化趋势将以持续改善和未来退化为主,分别占 44.75%和 39.97%。必须密切关注可能出现退化的区域。本研究结果可为小江流域生态环境保护、管理和可持续发展提供理论依据。
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全部 J. Leather Sci. Eng. 中国医学科学院学报 Acta physiologica Sinica 现代纺织技术 生态毒理学报 Building Science Chemical Industry and Engineering Progress Chemical Engineering & Machinery China Elastomerics China Plastics China Nonferrous Metallurgy China Brewing 中国食品添加剂 Chinese Journal of Aerospace Medicine 中国给水排水 Chemical Industry Chinese Journal of Applied Chemistry China Dairy Industry China Petroleum Exploration China Oils and Fats Chinese Journal of Spectroscopy Laboratory Chinese Journal of Power Sources 煤炭科学技术 Corrosion Science and Protection Technology Current Biotechnology Emerging Contaminants 储能科学与技术 Electric Switchgear Equipment Environmental Engineering Fine and Specialty Chemicals 食品与发酵工业 Fire Safety Science Fire Science and Technology Food and Drug Geological bulletin of China Frontiers of Forestry in China Industrial Furnace 工业水处理 安徽农业科学 北京林业大学学报 Journal of Cellulose Science and Technology Journal of Dairy Science and Technology Journal of Dalian Jiaotong University Journal of Hunan University Natural Sciences 燃料化学学报 Journal of Hubei University of Technology Journal of Isotopes Journal of Materials Engineering 兰州理工大学学报 Journal of Magnetic Materials and Devices Journal of Mechanical Engineering Journal of Northeast Forestry University Journal of Radiation Research and Radiation Processing Journal of Salt Lake Research Journal of Taiyuan University of Science and Technology Journal of Tea Science Journal of the Chinese Society of Corrosion and Protection Journal of Tianjin Polytechnic University Light Metals Liquor-making Science & Technology 润滑与密封 Lubricating Oil Materials protection Meat Research Membrane Science and Technology Mining and Metallurgy Mining and Metallurgical Engineering Microcomputer Information 现代食品科技 Natural Gas Chemical Industry 新型建筑材料 Optical Instruments Ordnance Material Science and Engineering Petroleum Research Petrochemical Technology & Application Petrochemical Technology Pipeline Technique and Equipment Pollution Control Technology Power system technology Progress in Modern Biomedicine Progress in Steel Building Structures Resources Environment & Engineering 可再生能源 环境科学研究 Science & Technology in Chemical Industry Science and Technology of Cereals,oils and Foods Shandong Chemical Industry 食品工业科技 Science Technology and Engineering Shandong Building Materials Shandong Textile Science & Technology Surface Technology Synthetic Materials Aging and Application 水处理技术 Thermal Power Generation Transactions of Tianjin University Tungsten Urban Environment & Urban Ecology Water science and engineering 工程设计学报
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