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Identification of high oxygen-consuming substances in stormwater drainage systems illicitly connected with sewage system

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Journal of Environmental Sciences 2024年第4期138卷 132-140页

作者： chen Xu Zuxin Xu wenhai Chu Shanshan Wu Rong Xiao Lei Su State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Ministry of Education Key Laboratory of Yangtze River Water Environment Tongji UniversityShanghai 200092China Guangzhou Resource Environmental Protection Technology Co. Ltd.Guangzhou 510030China

The dissolved oxygen content in water is an important indicator for assessing the quality of the water environment,and maintaining a certain amount of dissolved oxygen is essential for the healthy development of the ecological *** a water body is anoxic,the activity of anaerobic microorganisms increases and organic matter is decomposed to produce a large number of blackening and odorizing substances,resulting in black and odorous water bodies,which is a very common and typical phenomenon in ***,there is still a relatively universal occurrence of illicitly connected stormwater and sewage pipes in the urban drainage pipe network in China,which makes oxygen-consuming substances be directly discharged into rivers through stormwater pipes and consume the dissolved oxygen in the water bodies,resulting in an oxygen deficiency of the *** induces seasonal or year-round black and stink phenomena in urban ***,identifying high oxygen-consuming substances,which lays the foundation for the subsequent removal of oxygen-consuming substances,is *** a series of comparisons of water quality indicators and analysis of organic characteristics,it was found that the oxygen consumption capacity of domestic sewage was higher than that of industrial wastewater in the selected area of this study,and the oxygen-consuming substances of domestic sewage were small molecular amino *** comparing 20 conventional free amino acids,it was found that seven of them consumed oxygen easily,and compared with chemical oxygen consumption,biological oxygen consumption was in a leading position.

关键词： Urban drainage system Oxygen-consuming substances Domestic sewage Amino acid

浙北平原地区森林资源动态分析及发展建议——以浙江海宁为例

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浙江农业科学 2024年第5期65卷 1242-1248页

作者：赵献民郑先芳陈文海金国林吴龙飞海宁市林业管理服务中心浙江海宁314400 海宁市经济作物技术服务站浙江海宁314400

以海宁市为森林资源研究对象,对浙北平原地区森林资源现状及特点进行了总结。通过对2009年与2017年两期森林资源二类调查成果数据的地类面积、林木蓄积、林种结构等6个方面进行了分析研究,探索了森林资源消长趋势,提出了保护发展森林资... 详细信息

以海宁市为森林资源研究对象,对浙北平原地区森林资源现状及特点进行了总结。通过对2009年与2017年两期森林资源二类调查成果数据的地类面积、林木蓄积、林种结构等6个方面进行了分析研究,探索了森林资源消长趋势,提出了保护发展森林资源的5条建议,以期望对平原林业的可持续发展提供一定的指导作用。

关键词：森林资源动态分析发展建议浙北平原

轨道交通用橡胶产品加速试验研究现状及发展趋势

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轨道交通材料 2024年第2期3卷 46-49页

作者：王婷婷罗婵蒋富林陈文海王晓旭株洲时代新材料科技股份有限公司湖南株洲412003

轨道交通用橡胶产品受环境影响较大,容易失效,有必要研究其老化机理,并制定合适的加速试验验证方案以有效检出故障,并对橡胶产品的寿命进行准确预测。文章对轨道交通用橡胶制品的老化机理进行总结,介绍了疲劳老化、热氧老化、湿热老化... 详细信息

轨道交通用橡胶产品受环境影响较大,容易失效,有必要研究其老化机理,并制定合适的加速试验验证方案以有效检出故障,并对橡胶产品的寿命进行准确预测。文章对轨道交通用橡胶制品的老化机理进行总结,介绍了疲劳老化、热氧老化、湿热老化、臭氧老化、低温老化等的作用机理和试验方法,并分析了现有的加速试验现状,指出现有的老化试验还处于单一应力谱研究阶段。结合军品试验开展思路,提出了自然应力谱的收集编制方法和加速试验谱的转化方法,并在此基础上提出未来数据收集与加速模型及其参数库建立的建议,为今后轨道交通用橡胶产品的加速试验研究及寿命预测提供参考。

关键词：橡胶产品加速试验老化因素加速试验谱

基于温度梯度对吸烟效果影响的仿真及系统控制研究

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家电科技 2024年第1期1卷 108-113页

作者：陈文海吴勇孟永哲管国虎刘凡王丽丽青岛海尔智慧厨房电器有限公司山东青岛266100 数字家庭网络国家工程研究中心山东青岛266101

吸油烟机清除室内油烟气粒混合物的过程主要分为拢油烟、吸油烟和排油烟三个阶段。拢油烟的能力是吸油烟机排烟效果的首要保障,研究发现灶具在加热过程中产生的热量会在炉头和吸油烟机吸烟口之间形成温度梯度,温度梯度油烟颗粒作用产生... 详细信息

吸油烟机清除室内油烟气粒混合物的过程主要分为拢油烟、吸油烟和排油烟三个阶段。拢油烟的能力是吸油烟机排烟效果的首要保障,研究发现灶具在加热过程中产生的热量会在炉头和吸油烟机吸烟口之间形成温度梯度,温度梯度油烟颗粒作用产生了向上的热浮力,在热浮力的作用下,油烟颗粒混合物上升和扩散的速度也不同。从模拟仿真和实机测试两个维度进行分析,由于燃气灶和电磁灶的加热原理和热传导方式不同,分别使用燃气灶和电磁灶两种不同加热方式验证不同的温度梯度对吸油烟机吸烟效果影响。分析发现燃气灶加热比电磁灶加热油烟气粒混合物体扩散速度提升约2倍,油烟捕集率下降约12%,通过温度作为判断条件,可在不增加能耗的情况下保证吸烟效果。

关键词：油烟气粒混合物温度梯度热浮力排烟效果

Distributed Adaptive Cooperative Tracking of Uncertain Nonlinear Fractional-order Multi-agent Systems

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IEEE/CAA Journal of Automatica Sinica 2020年第1期7卷 292-300页

作者： Zhitao Li Lixin Gao wenhai chen Yu Xu Institute of Intelligent Systems and Decision Wenzhou UniversityZhejiang 325035China College of Physics and Electronic Information Engineering Wenzhou UniversityWenzhou 325035China

In this paper, the leader-following tracking problem of fractional-order multi-agent systems is addressed. The dynamics of each agent may be heterogeneous and has unknown nonlinearities. By assumptions that the interaction topology is undirected and connected and the unknown nonlinear uncertain dynamics can be parameterized by a neural network, an adaptive learning law is proposed to deal with unknown nonlinear dynamics, based on which a kind of cooperative tracking protocols are constructed. The feedback gain matrix is obtained to solve an algebraic Riccati equation. To construct the fully distributed cooperative tracking protocols, the adaptive law is also adopted to adjust the coupling weight. With the developed control laws,we can prove that all signals in the closed-loop systems are guaranteed to be uniformly ultimately bounded. Finally, a simple simulation example is provided to illustrate the established result.

关键词： Index Terms—Adaptive control consensus distributed control,fractional-order systems multi-agent system.

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On l-th NMDS Codes

Chinese Journal of Electronics 2014年第3期23卷 454-457页

作者： TONG Hongxi chen wenhai YU Fei Department of Mathematics Shanghai University Science and Technology on Communication Security Laboratory

Linear codes with Singleton defects equivalent to 0, 1, 2 are studied, and they have good properties. They are called MDS codes, NMDS codes, NNMDS cdoes, respectively. In this paper, we study linear codes with large Singleton defects and these codes have same good properties with MDS codes, NMDS codes, NNMDS codes. We call them l-th NMDS codes. A series of iff conditions of l-th NMDS codes is presented. And we give an upper bound on length of l-th NMDS codes. In the last,some examples of l-th NMDS codes are given.

关键词： Linear codes Maximum distance separated(MDS) codes Singleton defects Near maximum distance separated(NMDS) codes Generalized Ham

Defect engineering of W^(6+)-doped NiO for high-performance black smart windows

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Nano Research 2024年第4期17卷 3043-3052页

作者： Yingjun Xiao Xiang Zhang Dukang Yan Jianbo Deng Mingjun chen Hulin Zhang wenhai Sun Jiupeng Zhao Yao Li School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001China Center for Composite Materials and Structure Harbin Institute of TechnologyHarbin 150001China

In this report,W^(6+)doping as a defect engineering strategy has been proposed to improve the electrochromic properties of NiO *** research was conducted to explore the electrochromic properties and the modified mechanism of W-doped NiO *** to the pure NiO,W-doped NiO film exhibits improved electrochromic properties with significant optical modulation(61.56%at 550 nm),fast switching speed(4.42 s/1.40 s for coloring/bleaching),high coloration efficiency(45.41 cm^(2)·C-1)and outstanding cycling stability(no significant attenuation after 2000 cycles)in Li-based *** functional theory(DFT)calculations combined with the experimental results indicate that the improved electrochromic properties were due to enhanced the electronic conductivity and ion conductivity after the introduction of W^(6+).The charge capacity of W-doped NiO has also been improved,and it can function with WO_(3) to achieve a high performance black electrochromic smart window(ECSW)by balancing *** work could advance the fundamental understanding of defect engineering as an effective strategy to boost the electrochromic properties of NiO anodic material,manifesting a significant development as a candidate counter electrode in high-performance black smart windows.

关键词： NiO defect engineering charge balance black electrochromic windows

Research on Autonomous Orbit Determination of Navigation Satellite Based on Crosslink Range and Orientation Parameters Constraining

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Geo-Spatial Information Science 2006年第1期9卷 18-23页

作者： CAI Zhiwu ZHAO Dongming chen Jinping JIAO wenhai Center of Information Application and Development Around World P. O. Box 5136 Beijing 100094 China

Autonomous navigation of navigation satellite is di scussed. The method of auto-orbit determination using the crosslink range and o rientation parameters constraining is put forward. On the basis of the analysis of it... 详细信息

关键词：卫星导航系统轨道参数卫星测量空间检测

Tumor-derived exosomes induce initial activation by exosomal CD19 antigen but impair the function of CD19-specific CAR T-cells via TGF-βsignaling

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Frontiers of Medicine 2024年第1期18卷 128-146页

作者： Yuanyuan Hao Panpan chen Shanshan Guo Mengyuan Li Xueli Jin Minghuan Zhang wenhai Deng Ping Li Wen Lei Aibin Liang Wenbin Qian Department of Hematology The Second Affiliated HospitalCollege of MedicineZhejiang UniversityHangzhou310009China Department of Hematology Henan Provincial People’s HospitalZhengzhou University People’s HospitalZhengzhou450003China Key Laboratory of Laboratory Medicine Ministry of EducationSchool of Laboratory Medicine and Life SciencesWenzhou Medical UniversityWenzhou325000China Department of Hematology Tongji Hospital of Tongji UniversityShanghai200065China

Tumor-derived exosomes (TEXs) enriched in immune suppressive molecules predominantly drive T-cell dysfunction and impair antitumor immunity. Chimeric antigen receptor (CAR) T-cell therapy has emerged as a promising treatment for refractory and relapsed hematological malignancies, but whether lymphoma TEXs have the same impact on CAR T-cell remains unclear. Here, we demonstrated that B-cell lymphoma-derived exosomes induce the initial activation of CD19-CAR T-cells upon stimulation with exosomal CD19. However, lymphoma TEXs might subsequently induce CAR T-cell apoptosis and impair the tumor cytotoxicity of the cells because of the upregulated expression of the inhibitory receptors PD-1, TIM3, and LAG3 upon prolonged exposure. Similar results were observed in the CAR T-cells exposed to plasma exosomes from patients with lymphoma. More importantly, single-cell RNA sequencing revealed that CAR T-cells typically showed differentiated phenotypes and regulatory T-cell (Treg) phenotype conversion. By blocking transforming growth factor β (TGF-β)-Smad3 signaling with TGF-β inhibitor LY2109761, the negative effects of TEXs on Treg conversion, terminal differentiation, and immune checkpoint expression were rescued. Collectively, although TEXs lead to the initial activation of CAR T-cells, the effect of TEXs suppressed CAR T-cells, which can be rescued by LY2109761. A treatment regimen combining CAR T-cell therapy and TGF-β inhibitors might be a novel therapeutic strategy for refractory and relapsed B-cell lymphoma.

关键词： tumor-derived exosome chimeric antigen receptor T-cell lymphoma TGF-β