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Dead lithium phase investigation of Sn-Zn alloy as anode materials for lithium ion battery

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Chinese Science Bulletin 2009年第6期54卷 1003-1008页

作者： HUANG ZhaoWen HU SheJun HOU XianHua RU Qiang yu hongwen ZHAO LingZhi LI WeiShan School of Physics and Telecommunication Engineering South China Normal University Guangzhou 510006 China Department of Mathematics and Physics Wuyi University Jiangmen 529020 China Key Lab of Electrochemical Technology on Energy Storage and-Power Generation in Guangdong Universities Guangzhou 510006 China

In this work, based on First-principle plane wave pseudo-potential method, we have carried out an in-depth study on the possible dead lithium phase of Sn-Zn alloy as anode materials for lithium ion batteries. Through investigation, we found that the phases LixSn4Zn4(x = 2, 4, 6, 8) contributed to re-versible capacity, while the phases LixSn4Zn8-(x-4)(x = 4.74, 7.72) led to capacity loss due to high forma-tion energy, namely, they were the dead lithium phases during the charge/discharge process. And we come up with a new idea that stable lithium alloy phase with high lithiation formation energy (dead lithium phase) can also result in high loss of active lithium ion, besides the traditional expression that the formation of solid electrolyte interface film leads to high capacity loss.

关键词：锂离子电池负极材料锂合金死亡 Sn Zn 固体电解质界面膜容量损失

A Study of the Characteristics of Microorganisms for Effective Degradation of Marine Oil Spills

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Petroleum Science 2006年第1期3卷 61-67页

作者： Zhang Zhongzhi Wei Xiaofang Zong Chang yu hongwen Li Chengjian He Ruibing Faculty of Chemistry ＆ Chemical Engineering China University of Petroleum Beijing 102249 China Bohai Oil Technical Service Company China National Offshore Oil Corp.Tanggu Hebei 065000 China

Four microorganism strains were isolated from coastal petroleum-polluted soil and sand samples of Bohai Sea oilfield; they were found to degrade marine oil spills effectively. The experimental results show that the degradation efficiency of crude oil with these four strains （XT-4, SZ-1-25, B-4-9, BS-3-12） is 95.97%, 96.01%, 97.99% and 98.99%, respectively, in their optimum conditions. The characteristics of bacterial biodegradation are investigated. The simulation biotreatment of oil-contaminated beach sand, with an initial oil content of 5,664mg/kg-dry-sand, shows that the residual oil content is 2,700 mg/kg-dry-sand and 2,679 mg/kg-dry-sand after 170 days＇ treatment with two bacteria （B-4-9, BS-3- 12）, respectively.

关键词： Petroleum pollution halophilic bacteria biodegradation simulation biotreatment of beach sand

Optimization for UAV-assisted simultaneous transmission and reception communications in the existence of malicious jammers

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Security and Safety 2024年第1期3卷 68-87页

作者： Zhiyu Huang Shuzhen Liu Zhichao Sheng hongwen yu Antonino Masaracchia Key Laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai UniversityShanghai 200444China School of Electronics Electrical Engineering and Computer ScienceQueen's University BelfastBelfast BT71NNUK

In this paper,we study an unmanned aerial vehicle(UAV)-assisted communication system,where the UAV is dispatched to implement simultaneous transmission and reception(STR)in the existence of multiple malicious *** schemes are investigated,namely frequency band-division-duplex(FDD)and time-fraction(TF).Based on the FDD scheme,the UAV can transmit information by using the portion of the bandwidth and receive information within the remaining portion of the bandwidth *** perform the STR within the whole bandwidth,the TF-based scheme is considered by using a fraction of a time slot for the downlink,while the remaining fraction of the time slot is allocated for the *** aim to maximize the worst-case throughput by optimizing the UAV three-dimensional(3D)trajectory and resource allocation for each *** optimization problem is non-convex and thus computationally *** handle the nonlinear problem,we use the block coordinate decomposition method to disaggregate the optimization problem into four subproblems and adopt the successive convex approximation technique to tackle non-convex *** simulation results demonstrate the performance of the TF-based scheme over the benchmark schemes.

关键词： Unmanned aerial vehicle(UAV)-assisted communication simultaneous transmission and reception(STR) throughput optimization non-convex optimization

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新城区绿化树种选择研究

安徽农业科学 2007年第4期35卷 994-995,997页

作者：余洪文杭州职业技术学院艺术系浙江杭州310018

透过“香樟黄化”现象,论述目前新城区绿化在树种选择上存在的问题,并且分析产生这些问题的原因,最后就树种选择和应用问题的解决途径进行了探讨。

关键词：香樟黄化新城区树种选择

Bone analysis using an aggregation-induced emission-active iridium complex

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Aggregate

Aggregate 2023年第6期4卷 110-119页

作者： Xianpeng Zhang Xinling Liu hongwen yu Shuang Shen Junchao Zhi Zhen GaoJingqi Xin Jiaqi Song Liang Shao Caiting Meng Feifei An Taotao Huo Shichang Liu Ye Zhang Li Xu Guanying Li Department of Biophysics School of Basic Medical SciencesHealth Science CentreXi’an Jiaotong UniversityXi’anP.R.China School of Chemistry and Chemical Engineering Guangdong Pharmaceutical UniversityZhongshanP.R.China Department of Spine Surgery Honghui HospitalXi’an Jiaotong UniversityXi’anP.R.China Active Soft Matter Group Songshan Lake Materials LaboratoryDongguanP.R.China School of Public Health Health Science CentreXi’an Jiaotong UniversityXi’anP.R.China

Fluorescent analysis of bone provides valuable insights into bone ***,conventional dyes suffer from low specificity on bone tissue,small stokes shift,short fluorescent lifetime,and aggregation-caused quenching effect,which result in low efficacy and *** this work,we design an aggregation-induced emission(AIE)-active iridium(III)complex(Ir-BP2)as a highly selective,convenient,nondestructiveness,and dual-mode staining agent for bone ***-BP2 containing phosphonate groups selectively binds to hydroxyapatites,the main component of bone matrix,and exhibits turn-on AIE phosphorescence with prolonged ***-BP2 exhibits promising biosafety and offers higher accuracy in staining calcium deposits than conventional Alizarin Red S staining assay when it is employed in real-time monitoring of osteogenesis differentiation process.A ready-to-use staining spray of Ir-BP2 is *** using fluorescent imaging and lifetime imaging,Ir-BP2 staining provides valuable insights into bone microstructure analysis,microdamage diagnosis,and bone growth state ***,Ir-BP2 is successfully applied on a human spine vertebra for diagnosing bone invasiveness of eosinophilic granuloma,validating its clinical *** work presents a powerful tool in bone analysis and will lead to new approaches for the diagnosis and treatment of bone-related diseases.

关键词： aggregation-induced emission bone analysis clinical diagnosis eosinophilic granuloma iridium complexes phosphorescent probe

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太阳能真空管玻璃质量等级评价研究

太阳能学报 2013年第7期34卷 1190-1196页

作者：张艳丽于洪文田英良山东经济学院济南250014 山东省科学院能源研究所济南250014 北京工业大学材料学院北京100124

理论结合实践,介绍太阳能真空管玻璃出现的质量问题及危害性,依据玻璃均匀性与力学性能之间的关系建立一套定性、定量玻璃等级评价体系,并积累大量实验数据验证其可行性,为国家出台统一的太阳能真空管玻璃等级评价标准提供参考。

关键词：太阳能真空管环切检测技术玻璃均匀性玻璃等级质量控制

智能电网调度技术支持系统值班告警的研发与应用

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电网技术 2014年第8期38卷 2286-2290页

作者：叶飞刘金波于宏文马发勇国网电力科学研究院北京市海淀区100192 国家电力调度控制中心北京市西城区100031 国网华中分控中心湖北省武汉市430000

针对智能电网调度技术支持系统(简称技术支持系统)日常维护和故障诊断能力亟需提升的问题,结合智能电网实时运行监视要求,研制了一种基于专家系统并引入监视对象策略因子方法的值班告警系统。该告警系统能够根据策略因子准确判断监视对... 详细信息

针对智能电网调度技术支持系统(简称技术支持系统)日常维护和故障诊断能力亟需提升的问题,结合智能电网实时运行监视要求,研制了一种基于专家系统并引入监视对象策略因子方法的值班告警系统。该告警系统能够根据策略因子准确判断监视对象状态,并在发生故障时根据故障原因优选并提供处理预案。该系统采用支持横向信息交互的消息邮件服务、基于公共信息模型(common information model,CIM)接口的内存实时数据库、电力系统数据标记规范(CIM/E)以及电力系统图形描述规范(CIM/G)等技术,实现了技术支持系统各安全分区运行状态的监视和管理。运行实践证明,值班告警系统不仅提高了系统故障处理的响应速度,而且丰富了值班告警智能故障处理预案专家库。

关键词：技术支持系统公共信息模型值班告警故障处理预案策略因子专家系统

锡镍合金负极材料Li嵌入性质的平面波赝势方法研究

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稀有金属材料与工程 2008年第5期37卷 827-830页

作者：侯贤华胡社军李伟善赵灵智余洪文华南师范大学广东广州510006

利用基于密度泛函理论的第一性原理平面波赝势方法,对锡镍合金Ni2Sn和LiNi2Sn的电子结构进行计算。结果表明:负极材料Ni2Sn在脱嵌锂后,大量的镍原子将以团聚形式游离出来缓冲体积膨胀,体积膨胀率为8.418%,同时部分镍原子与锡原子形成较... 详细信息

利用基于密度泛函理论的第一性原理平面波赝势方法,对锡镍合金Ni2Sn和LiNi2Sn的电子结构进行计算。结果表明:负极材料Ni2Sn在脱嵌锂后,大量的镍原子将以团聚形式游离出来缓冲体积膨胀,体积膨胀率为8.418%,同时部分镍原子与锡原子形成较强共价键稳定基体骨架,抑制体积效应从而提高循环性能。这与实验规律一致。

关键词：锂离子电池负极材料 Sn-Ni合金电子结构第一性原理

支撑大电网调控系统无差别浏览的人机云终端及关键技术

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电网技术 2020年第2期44卷 420-428页

作者：韩水保汤卫东张令涛周联友于宏文国家电网有限公司华中分部湖北省武汉市430077 南瑞集团有限公司(国网电力科学研究院) 江苏省南京市211106 北京科东电力控制系统有限责任公司北京市海淀区100192

为了满足大电网调控系统统一分析、统一决策的需求,提出了一种支撑本地/异地无差别浏览的人机云终端。首先研究了云终端交互界面跨区域、跨系统的标准化解析和展示,在电网图形CIM/G规范的基础上提出了一种交互界面的多尺度描述方法,实... 详细信息

为了满足大电网调控系统统一分析、统一决策的需求,提出了一种支撑本地/异地无差别浏览的人机云终端。首先研究了云终端交互界面跨区域、跨系统的标准化解析和展示,在电网图形CIM/G规范的基础上提出了一种交互界面的多尺度描述方法,实现了界面描述与开发平台的解耦;然后,研究了云终端图形化开发工具实现应用界面的细粒度开发,并通过应用商店实现应用的全网注册、发布、维护等全生命周期管理;另外,通过人机交互网和标准的人机交互协议提升了人机云终端广域服务发现、调用和数据交互的能力,实现数据、服务的广域无差别调用。最后研究了自然方式的云终端人机交互,将人脸识别、语音识别及触摸控制等技术应用到云终端调控场景中,提高人机交互效率。通过异地同景和远程协同处置2个场景验证文中提出的人机云终端能够实现地域无关的同景展示。

关键词：云终端云计算大电网调控系统无差别浏览应用服务