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不同生境氨氮浓度及悬浮污泥对厌氧氨氧化生物膜特性的协同影响

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环境工程学报 2024年第1期18卷 121-129页

作者：杨慎华侯锋庞洪涛江乐勇孙事昊张璐晶彭永臻北京工业大学城镇污水深度处理与资源化利用技术国家工程实验室北京100124 信开环境投资有限公司北京101100

生物膜技术是厌氧氨氧化工艺应用的关键,但关于不同生境氨氮浓度和悬浮污泥协同作用下形成的生物膜特性鲜有报道。本研究在推流式固定生物膜-活性污泥反应器中,发现在高氨氮浓度下生长的生物膜具有较高的污泥量和厚度,但低氨氮浓度生长... 详细信息

生物膜技术是厌氧氨氧化工艺应用的关键,但关于不同生境氨氮浓度和悬浮污泥协同作用下形成的生物膜特性鲜有报道。本研究在推流式固定生物膜-活性污泥反应器中,发现在高氨氮浓度下生长的生物膜具有较高的污泥量和厚度,但低氨氮浓度生长的生物膜具有更高的厌氧氨氧化菌丰度((4.91±0.65)×10^(9)拷贝数·g^(-1),P<0.05)和厌氧氨氧化比活性(6.53 mg·(g·h)^(-1))。高通量分析结果表明,Candidatus Brocadia是生物膜和悬浮污泥中主要的厌氧氨氧化菌,在两类生物膜上的丰度未有显著差异;在低氨氮浓度生物膜中Candidatus Jettenia的相对丰度显著高于高氨氮浓度的生物膜,但Candidatus Kuenenia的丰度则相反。综合分析发现,厌氧氨氧化菌种的附着生长与悬浮污泥群落多样性的初始定殖有关,而低丰度菌种的分布则受不同生境的影响,该结果表明不同氨氮浓度和悬浮污泥类型的选择对生物膜的协同影响不可忽略。

关键词：短程硝化厌氧氨氧化生物膜氨氮浓度悬浮污泥微生物群落

Robust Fuzzy Sampled-Data Control for Dynamic Positioning Ships

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Journal of Shanghai Jiaotong university(Science) 2018年第2期23卷 209-217页

作者： ZHENG Minjie ZHOU Yujie yang shenhua School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China Navigation College Jimei University Xiamen 361021 Fujian China

A robust H∞sampled-data stabilization problem for nonlinear dynamic positioning(DP) ships with Takagi-Sugeno(T-S) fuzzy models is discussed in this paper. Input delay approach is used to convert the sampleddata DP ship system to a fuzzy system with time-varying delay. Adequate conditions are derived to determine the system's asymptotical stability and achieve H∞performance via Lyapunov stability theorems. Then, the fuzzy sampled-data controller is obtained by analyzing the stabilization condition. Simulation result shows that the proposed method and the designed controller for a DP ship are effective so that the DP ship can maintain the desired position, heading and velocities in the existence of varying environment disturbances.

关键词： dynamic positioning(DP) ships sampled-data control Lyapunov-Krasovskii functional Takagi-Sugeno(T-S) fuzzy models

Simulation Research on Operation of Union Purchase System in Navigation Simulator

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Journal of Shanghai Jiaotong university(Science) 2020年第5期25卷 606-614页

作者： FAN hang yang shenhua SUO Yongfeng ZHENG Minjie School of Navigation College Jimei UniversityXiamen 361021FujianChina

Navigation is the only way to develop and utilize marine resources,while the promotion of seafarers1 quality is the basic force of navigation,so navigation simulator plays an important role in modern navigation *** simulation research on the operation of the union purchase is important to improve the special operation training of the actual cargo handling of the union *** the basis of the Cartesian coordinate system transformation algorithm,the algorithm model of the union purchase operation is *** the basis of three-dimensional(3D)rendering engine technology of open scene graph(OSG),the algorithm model of finding the space coordinates of the cargo point is *** model of catenary equation is used to optimize the scene appearance of the cargo *** combination of QT channel signal mechanism and OSG,the simulation interaction of the union purchase operating system is *** acquiring the 3D coordinate values of each point,we fit the trajectories of each point in the operation and compare the *** results show that the model has high interactivity and small *** comparison of the states of the cargo wire before and after optimization shows that the optimized wire is more realistic and the high fidelity meets the needs of operational training and simulation systems.

关键词： navigation simulator union purchase coordinate system transformation open scene graph(OSG) catenary equation

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强化厌氧氨氧化生物膜形成的研究进展

环境工程 2024年第1期42卷 1-8页

作者：杨慎华张璐晶彭永臻庞洪涛江乐勇孙事昊翟丹丹信开环境投资有限公司北京101100 北京工业大学城镇污水深度处理与资源化利用技术国家工程实验室北京100124

厌氧氨氧化是污水处理领域最具应用前景的生物脱氮工艺,其中生物膜是富集厌氧氨氧化菌的有效手段。但厌氧氨氧化生物膜的形成和厌氧氨氧化菌的富集长达数月甚至更长周期,阻碍了厌氧氨氧化技术的推广应用。总结了近年来强化厌氧氨氧化生... 详细信息

厌氧氨氧化是污水处理领域最具应用前景的生物脱氮工艺,其中生物膜是富集厌氧氨氧化菌的有效手段。但厌氧氨氧化生物膜的形成和厌氧氨氧化菌的富集长达数月甚至更长周期,阻碍了厌氧氨氧化技术的推广应用。总结了近年来强化厌氧氨氧化生物膜形成并富集厌氧氨氧化菌的系列方法,重点探讨了载体类型的选择、载体表面预处理方法、生物质固定技术、反应器类型、厌氧氨氧化菌活性和竞争性强化等措施对厌氧氨氧化生物膜形成及菌种富集的影响。在厘清强化策略的基础上,阐述了各方法的优劣性和潜在的应用场景,同时展望了未来厌氧氨氧化生物膜技术的研究方向,可为厌氧氨氧化工艺的优化与应用提供重要参考。

关键词：厌氧氨氧化生物膜形成载体预处理固定化技术

Global patterns and ecological drivers of taxonomic and phylogenetic endemism in angiosperm genera

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Plant Diversity 2024年第2期46卷 149-157页

作者： Hong Qian Brent D.Mishler Jian Zhang shenhua Qian Research and Collections Center Illinois State Museum1011 East Ash StreetSpringfieldIL 62703USA University and Jepson Herbaria Department of Integrative BiologyUniversity of CaliforniaBerkeleyCA 94720-2465USA Center for Global Change and Complex Ecosystems Zhejiang Tiantong Forest Ecosystem National Observation and Research StationSchool of Ecological and Environmental SciencesEast China Normal UniversityShanghai 200241China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment Ministry of EducationChongqing UniversityChongqing 400045China

Endemism of lineages lies at the core of understanding variation in community composition among geographic regions because it reflects how speciation,extinction,and dispersal have influenced current ***,we investigated geographic patterns and ecological drivers of taxonomic and phylogenetic endemism of angiosperm genera across the *** identify centers of paleo-endemism and neo-endemism of angiosperm genera,and show that they are mostly located in the Southern Hemisphere in tropical and subtropical regions,particularly in Asia and *** categories of phylogenetic endemism centers can be differentiated using current climate *** climate,historical climate change,and geographic variables together explained~80%of global variation in taxonomic and phylogenetic endemism,while 42-46%,1%,and 15%were independently explained by these three types of variables,*** our findings show that past climate change,current climate,and geography act together in shaping endemism,which are consistent with the findings of previous studies that higher temperature and topographic heterogeneity promote *** study showed that many centers of phylogenetic endemism of angiosperms,including regions in Amazonia,Venezuela,and west-central tropical Africa that have not previously been identified as biodiversity hotspots,are missed by taxon-based measures of endemism,indicating the importance of including evolutionary history in biodiversity assessment.

关键词： Angiosperm Current climate Endemism Historical climate change Topographic heterogeneity

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缙云山常绿阔叶林粗木质残体储量及特征

林业科学 2019年第1期55卷 103-109页

作者：黄力高祥阳齐猛周侠杨超李笑寒杨圣贺钱深华杨永川重庆大学三峡库区生态环境教育部重点实验室重庆400045

【目的】实地调查缙云山常绿阔叶林粗木质残体(CWD)的储量和特征,分析其影响因素,为深入认识常绿阔叶林生态系统中与粗木质残体相关的物质循环等关键生态过程提供理论依据,并为全球碳汇及相关学科的研究提供基础数据。【方法】以缙云山... 详细信息

【目的】实地调查缙云山常绿阔叶林粗木质残体(CWD)的储量和特征,分析其影响因素,为深入认识常绿阔叶林生态系统中与粗木质残体相关的物质循环等关键生态过程提供理论依据,并为全球碳汇及相关学科的研究提供基础数据。【方法】以缙云山常绿阔叶林内已建立的2块0.5 hm^2样地为对象,调查并分析样地CWD的储量、类型组成、分解等级、径级分布格局以及地形对CWD储量的影响。【结果】缙云山常绿阔叶林CWD储量为38.42 t·hm^(-2),其中倒木、枯立木、大枯枝和木桩储量分别为27.70,4.91,2.91和2.90 t·hm^(-2),倒木是CWD的主要组成部分; CWD的树种组成与群落优势树种的组成相似,栲占CWD总量的88.44%;从径级分布来看,直径>35 cm的倒木和枯立木是CWD的主体; CWD主要处于分解中后期,中级分解和高级分解CWD的比例分别为63.20%和23.01%;地形对CWD的分布具有显著影响,坡面和山脊CWD储量高于沟谷(P<0.01)。【结论】缙云山常绿阔叶林CWD储量较大,处于该类森林系统的前列; CWD主要以处于分解中后期的优势种大径级倒木和枯立木为主,并主要分布在坡面和沟谷。在森林管理中应降低对CWD的人为干扰和去除,维持森林中枯立木、倒木、大枯枝和树桩等组分的自然状态。

关键词：粗木质残体储量组成常绿阔叶林缙云山

Regulating the inner Helmholtz plane structure at the electrolyte-electrode interface for highly reversible aqueous Zn batteries

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Journal of Energy Chemistry 2024年第8期95卷 57-67,I0002页

作者： Jianghe Liu Sanlue Hu Hexin Guo Guobin Zhang Wen Liu Jianwei Zhao shenhua Song Cuiping Han Baohua Li Shenzhen Key Laboratory on Power Battery Safety and Shenzhen Geim Graphene Center Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055GuangdongChina Shenzhen Key Laboratory of Advanced Materials School of Materials Science and EngineeringHarbin Institute of TechnologyShenzhen 518055GuangdongChina Faculty of Materials Science and Energy Engineering/Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongChina Shenzhen HUASUAN Technology Co. Ltd.Shenzhen 518055GuangdongChina

The development of aqueous Zn batteries is limited by parasitic water reactions,corrosion,and dendrite *** address these challenges,an inner Helmholtz plane(IHP)regulation method is proposed by employing low-cost,non-toxic maltitol as the electrolyte *** preferential adsorption behavior of maltitol can expel the water from the inner Helmholtz plane,and thus hinder the immediate contact between Zn metal and H_(2)***,strong interaction between maltitol and H_(2)O molecules can restrain the activity of H_(2)***,the"IHP adsorption effect"along with the low LUMO energy level of maltitol-CF_(3)SO_(3)^(-)can promote the in-situ formation of an organic-inorganic complex solid electrolyte interface(SEI)*** a result,the hydrogen/oxygen evolution side reaction,corrosion,and dendrites issues are effectively suppressed,thereby leading to highly reversible and dendrite-free Zn plating/*** Zn‖I_(2)battery with hybrid electrolytes also demonstrates high electrochemical performance and ultralong cycling stability,showing a capacity retention of 75%over 20000 charge-discharge cycles at a large current density of 5 A g^(-1).In addition,the capacity of the device has almost no obvious decay over20000 cycles even at-30℃.This work offers a successful electrolyte regulation strategy via the IHP adsorption effect to design electrolytes for high-performance rechargeable Zn-ion batteries.

关键词： Inner Helmholtz plane Adsorption effect Dendrite suppression SEI layer Zn||I_(2)battery

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大型船舶操纵模拟器的硬件设计与应用

电子技术应用 2013年第8期39卷 123-126页

作者：杨神化郑敏杰集美大学航海学院福建厦门361021

设计了大型船舶操纵模拟器操作台上常用的硬件设备,并对该硬件系统的总体架构以及设备的软硬件设计进行了详细介绍。该模拟器遵循STCW公约马尼拉修正案,满足中国海事局有关规定的性能标准,具有广泛的市场前景,并已投入到国内多家航海院... 详细信息

设计了大型船舶操纵模拟器操作台上常用的硬件设备,并对该硬件系统的总体架构以及设备的软硬件设计进行了详细介绍。该模拟器遵循STCW公约马尼拉修正案,满足中国海事局有关规定的性能标准,具有广泛的市场前景,并已投入到国内多家航海院校的教学培训中,取得了良好的效果。

关键词：船舶操纵模拟器硬件 485总线

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智能型船舶操纵模拟器的网络架构及其实现

中国航海 2013年第2期36卷 45-49页

作者：杨神化陈国权杨岳斌集美大学航海学院福建厦门361021

在传统船舶操纵模拟器的基础上,针对其目标船不具备自动避让它船能力的现状,提出了将液压伺服平台、六自由度船模、自动避碰成果等引入新型船舶操纵模拟器的研发中,自主研发了智能型船舶操纵模拟器。将整个船舶操纵模拟器系统抽象成3个... 详细信息

在传统船舶操纵模拟器的基础上,针对其目标船不具备自动避让它船能力的现状,提出了将液压伺服平台、六自由度船模、自动避碰成果等引入新型船舶操纵模拟器的研发中,自主研发了智能型船舶操纵模拟器。将整个船舶操纵模拟器系统抽象成3个相对独立的网络,提出了一种基于TCP的IOCP模型和基于UDP的阻塞模型相结合的通信网络架构,给出了系统的通信流程和通信协议。测试结果表明,这种解决方案较大地提高了船舶操纵模拟器的本船端容量,可以满足船舶操纵模拟器桌面系统的多本船端配置需求。

关键词：船舶、舰船工程船舶操纵模拟器智能目标船网络架构 IOCP 阻塞模型