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Physiochemical and biological characteristics of fouling on landfill leachate treatment systems surface

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Journal of Environmental Sciences 2024年第1期135卷 59-71页

作者： Zhourui Gong shu Yang Rui Zhang Yangqing Wang Xiaoqing Wu Liyan Song School of resources and environmental engineering Anhui UniversityHefei 230601China Anhui Shengjin Lake Wetland Ecology National Long-term Scientific Research Base Dongzhi 247230China Key Laboratory of Three Gorges Reservoir Region’s Eco-Environment Ministry of EducationChongqing UniversityChongqing 400045China Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China Xing Lu Huan Jing Co.LTD. Luzhou 646000China

Fouling of landfill leachate,a biofilm formation process on the surface of the collection system,migration pipeline and treatment system causes low efficiency of leachate transportation and treatment and increases cost for maintenance of those *** addition,landfill leachate fouling might accumulate pathogens and antibiotic resistance genes(ARGs),posing threats to the *** of the landfill leachate fouling and its associated environmental behavior is essential for the management of *** this study,physicochemical and biological properties of landfill leachate fouling and the possible accumulation capacity of pathogens and ARGs were investigated in nitrification(aerobic condition)and denitrification(anaerobic condition)process during landfill leachate biological treatment,*** show that microbial(bacterial,archaeal,eukaryotic,and viral)community structure and function(carbon fixation,methanogenesis,nitrification and denitrification)differed in fouling under aerobic and anaerobic conditions,driven by the supplemental leachate water *** fouling had a higher abundance of nitrification and denitrification functional genes,while anaerobic fouling harbored a higher abundance of carbon fixation and methanogenesis *** forms of leachate fouling had a higher abundance of pathogens and ARGs than the associated leachate,suggesting the accumulation capacity of fouling on biotic ***,aerobic fouling harbored three orders of magnitude higher multidrug resistance genes mex D than its associated *** finding provides fundamental knowledge on the biological properties of leachate fouling and suggests that leachate fouling might harbor significant pathogens and ARGs.

关键词： Landfill leachate fouling Biofilm Microbiome Carbon and nitrogen cycle Pathogens Antibiotic resistance genes

Quantum support vector machine for multi classification

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Communications in Theoretical Physics 2024年第7期76卷 57-62页

作者： Li Xu Xiao-yu Zhang Ming Li shu-qian Shen College of Science China University of PetroleumQingdao 266580China

Classical machine learning algorithms seem to be totally incapable of processing tremendous data,while quantum machine learning algorithms could deal with big data unhurriedly and provide exponential acceleration over classical *** this paper,we propose two quantum support vector machine algorithms for multi *** is the quantum version of the directed acyclic graph support vector *** other one is to use the Grover search algorithm before measurement,which amplifies the amplitude of the phase storing of the classification *** k classification,the former provides quadratic reduction in computational complexity when *** latter accelerates the training speed significantly and more importantly,the classification result can be read out with a probability of at least 50%using only one *** conduct numerical simulations on two algorithms,and their classification success rates are 96%and 88.7%,respectively.

关键词： quantum support vector machine quantum feature mapping Grover search algorithm

Adaptive Algorithms on Maximizing Monotone Nonsubmodular Functions

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Journal of the Operations Research Society of China 2024年第2期12卷 428-445页

作者： Bin Liu Hui Su shu-Fang Gong Qi-Zhi Fang School of Mathematical Sciences Ocean Universityof ChinaQingdao266100ShandongChina

Submodular optimization is widely used in large *** order to speed up the problems solving,it is essential to design low-adaptive algorithms to achieve acceleration in *** general,the function values are given by a value oracle,but in practice,the oracle queries may consume a lot of ***,how to strike a balance between optimizing them is *** this paper,we focus on maximizing a normalized and strictly monotone set function with the diminishing-return ratio under a cardinality constraint,and propose two algorithms to deal with *** apply the adaptive sequencing technique to devise the first algorithm,whose approximation ratio is arbitrarily close to 1.e^(-γ)in O(logn·log(log k/γ)) adaptive rounds,and requires O(logn^(2)·log(log k/γ)) *** by adding preprocessing and parameter estimation steps to the first algorithm,we get the second *** second algorithm trades a small sacrifice in adaptive complexity for a significant improvement in query *** the same approximation and adaptive complexity,the query complexity is improved *** the best of our knowledge,this is the first paper of designing adaptive algorithms for maximizing a monotone function using the diminishing-return ratio.

关键词： Approximation algorithm Adaptivity Nonsubmodular maximization Cardinality constraint

Resurgence of pertussis:reasons and coping strategies

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World Journal of Pediatrics 2024年第7期20卷 639-642页

作者： Chun-Zhen Hua Han-Qing He Qiang shu Department of Infectious Diseases National Clinical Research Center for Child HealthChildren’s HospitalZhejiang University School of MedicineHangzhou310052China Department of Immunization Program Zhejiang Provincial Center for Disease Control and PreventionHangzhou310051China National Clinical Research Center for Child Health Children’s HospitalZhejiang University School of MedicineHangzhou310052China

Pertussis(whooping cough)is an acute and contagious respiratory disease caused by the pathogen Bordetella pertussis(***).*** can infect individuals of all *** with pertussis may experience severe and persistent coughing and paroxysms;for newborns and infants,pertussis may be *** development and widespread administration of the pertussis vaccine had once successfully brought pertussis under control,maintaining it at a low level for many ***,resurgence of pertussis has been reported in many countries even with high vaccination coverage *** resurgence of pertussis was first reported in the United States(USA)in 1.93[1..During 2000–201.,the baseline incidence increased and the age distribution of pertussis changed in the USA[2].Other countries including Canada[3],Australia[4],European Union countries,and South Korea have also reported a rise in pertussis outbreaks[2,5].

关键词： pertussis Canada surge

Multi-Objective Equilibrium Optimizer for Feature Selection in High-Dimensional English Speech Emotion Recognition

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Computers, Materials & Continua 2024年第2期78卷 1957-1975页

作者： Liya Yue Pei Hu shu-Chuan Chu Jeng-Shyang Pan Fanli Business School Nanyang Institute of TechnologyNanyang473004China School of Computer and Software Nanyang Institute of TechnologyNanyang473004China College of Computer Science and Engineering Shandong University of Science and TechnologyQingdao266590China Department of Information Management Chaoyang University of TechnologyTaichung413310Taiwan

Speech emotion recognition(SER)uses acoustic analysis to find features for emotion recognition and examines variations in voice that are caused by *** number of features acquired with acoustic analysis is extremely high,so we introduce a hybrid filter-wrapper feature selection algorithm based on an improved equilibrium optimizer for constructing an emotion recognition *** proposed algorithm implements multi-objective emotion recognition with the minimum number of selected features and maximum ***,we use the information gain and Fisher Score to sort the features extracted from ***,we employ a multi-objective ranking method to evaluate these features and assign different importance to *** with high rankings have a large probability of being ***,we propose a repair strategy to address the problem of duplicate solutions in multi-objective feature selection,which can improve the diversity of solutions and avoid falling into local *** random forest and K-nearest neighbor classifiers,four English speech emotion datasets are employed to test the proposed algorithm(MBEO)as well as other multi-objective emotion identification *** results illustrate that it performs well in inverted generational distance,hypervolume,Pareto solutions,and execution time,and MBEO is appropriate for high-dimensional English SER.

关键词： Speech emotion recognition filter-wrapper high-dimensional feature selection equilibrium optimizer multi-objective

Asymptotic normality of error density estimator in stationary and explosive autoregressive models

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Applied Mathematics(A Journal of Chinese Universities) 2024年第1期39卷 140-158页

作者： WU Shi-peng YANG Wen-zhi GAO Min HU shu-he School of Mathematical Sciences&School of Big Data and Statistics Anhui UniversityHefei 230601China School of Statistics Shanxi University of Finance and EconomicsTaiyuan030006China

In this paper,we consider the limit distribution of the error density function estima-tor in the rst-order autoregressive models with negatively associated and positively associated random *** mild regularity assumptions,some asymptotic normality results of the residual density estimator are obtained when the autoregressive models are stationary process and explosive *** order to illustrate these results,some simulations such as con dence intervals and mean integrated square errors are provided in this *** shows that the residual density estimator can replace the density\estimator"which contains errors.

关键词： explosive autoregressive models residual density estimator asymptotic distribution association sequence

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稳恒磁场对电镀铬的影响

沈阳工业学院学报 2004年第2期23卷 83-85页

作者：牟世辉袁艳姚淑霞沈阳理工大学环境与化学工程学院辽宁沈阳110168 中国兵器工业第五九研究所燕山大学

利用直角阴极法、远近阴极法和恒电量称重法研究了稳恒磁场对电镀铬的镀液及镀层性能的影响 ,并对其原因进行了分析 .实验结果表明 ,稳恒磁场的加入对提高镀铬液的覆盖能力。

关键词：稳恒磁场电镀铬分散能力覆盖能力直角阴极法远近阴极法恒电量称重法

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延迟焦化1.Cr5 Mo炉管使用状况分析

石油化工高等学校学报 2004年第3期17卷 73-75页

作者：胡传顺韦达刚秦华陈志军张淑娟辽宁石油化工大学机械工程学院辽宁抚顺113001 抚顺石油化工公司设备研究所辽宁抚顺113008

为掌握延迟焦化炉管的使用状况 ,确保加热炉的安全运行 ,对使用中的延迟焦化加热炉 1.r5Mo炉管经现场取样 ,检测 ,通过壁厚测试、显微组织检验 ,氧化层与结焦层分析 ,讨论了炉管运行过程中对炉管造成损伤的影响因素。结果表明 ,因外壁氧... 详细信息

为掌握延迟焦化炉管的使用状况 ,确保加热炉的安全运行 ,对使用中的延迟焦化加热炉 1.r5Mo炉管经现场取样 ,检测 ,通过壁厚测试、显微组织检验 ,氧化层与结焦层分析 ,讨论了炉管运行过程中对炉管造成损伤的影响因素。结果表明 ,因外壁氧化 ,炉管减薄已出现 ,内壁增碳和外壁脱碳现象出现 ,珠光体球化导致炉管组织损伤。珠光体球化 ,不符合GB994 8- 88中的供货热处理工艺规定的退火状态和金相组织为铁素体 +珠光体要求。结合珠光体球化形态说明短时超温现象的存在 ,外壁表面出现高温蠕变特征 ,壁厚减薄虽不严重 ,但炉管继续使用存在安全隐患的问题。

关键词：延迟焦化 1.r5Mo炉管分析

永恒的丰碑：“大陈岛垦荒红色档案”建设侧记

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浙江档案 2024年第5期 10-11+16页

作者： 1.台州市档案馆 2.台州市椒江区档案馆台州市档案馆台州市椒江区档案馆

在台州市椒江区档案馆的特藏馆内，挂着一幅由团中央在1.56年赠给温州青年志愿垦荒队的旗帜“建设伟大祖国的大陈岛”，这面旗帜承载着一件件珍贵的档案史料和一个个生动的历史场景，大陈岛激情燃烧的垦荒史、波澜壮阔的发展史，宛如画...

在台州市椒江区档案馆的特藏馆内，挂着一幅由团中央在1.56年赠给温州青年志愿垦荒队的旗帜“建设伟大祖国的大陈岛”，这面旗帜承载着一件件珍贵的档案史料和一个个生动的历史场景，大陈岛激情燃烧的垦荒史、波澜壮阔的发展史，宛如画卷般展现在眼前。“大陈岛垦荒精神”是台州的城市精神，是这座城市发展生生不息的力量源泉。1.56年到1.60年，温州、台州两地467名青年陆续上岛支援建设，他们卷起裤管，咬紧牙关，用血和汗锻炼成了一个个生产能手，在荒岛上发展出种植业、畜牧业和海洋养殖业。一代垦荒人用青春和汗水孕育了“艰苦创业、奋发图强、无私奉献、开拓创新”

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