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Search Results: 1 - 10 of 267155 matches for " 杨勇<br>GUAN Xiao-yun "
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高首效富镍正极材料LiNi0.6Co0.2Mn0.2O2的合成及电化学性能研究
Synthesis and Electrochemical Properties of Nickel-Rich Cathode Material LiNi0.6Co0.2Mn0.2O2 with High Initial Coulombic Efficiency

关小云,洪朝钰,朱建平,王伟立,李益孝,杨勇<br>GUAN Xiao-yun, HONG Chao-yu, ZHU Jian-ping, WANG Wei-li, LI Yi-xiao,YANG Yong
- , 2018, DOI: 10.13208/j.electrochem.170317
Abstract: 摘要 采用共沉淀—高温固相烧结的方法合成了富镍正极材料LiNi0.6Co0.2Mn0.2O2(简称NCM622),通过X射线粉末衍射(XRD)/Rietveld精修法、扫描电子显微镜(SEM)及电化学测试,对不同温度下合成材料的结构、形貌、电化学性能进行表征. 结果表明,800℃下,NCM622阳离子混排程度最低(~1.97%),首圈库伦效率高达92.2%,100圈容量保持率为81.4%.
Nickel-rich cathode materials LiNi0.6Co0.2Mn0.2O2(NCM622)were synthesized by a co-precipitation-solid state sintering method at different temperatures. The structure, morphology and electrochemical performance of the as-prepared materials were investigated by X-ray powder diffraction (XRD) /Rietveld refinement, scanning electron microscope (SEM) and electrochemical experiments. It is found that NCM622 calcined at 800 ℃ showed the lowest degree of cation disorder (~1.97%) with a high initial Coulombic effiency of 92.2% and the capacity retention of 81.4% after 100 cycles
Kinetics of continuous biodegradation of pesticide organic wastewater by activated carbon-activated sludge
Zhou Xiao-yun,Chen Ming,<br>Zhou Xiao-yun,Chen Ming
环境科学学报(英文版) , 1999,
Abstract: Organic triazophos wastewater was continuously treated with Rhodopseudomonas capsulatus and activated carbon and activated sludge system(PACT-AS) in a plug bioreactor. A kinetic model of PACT-AS wastewater treatment system was established to provide an useful basis for further simulate scale-up treatment of toxic organic wastewater.
Effect of bacterivorous nematode on soil microbial biomass and microbiocoen-(osis)
食细菌线虫对土壤微生物量和微生物群落结构的影响

CHEN Xiao-Yun,<br>陈小云
生态学报 , 2004,
Abstract: Researches on the interaction between nematodes and microbes were usually carried out in gnotobiotic microcosm, in order to know the interaction in open soil system, we inoculated bacterivorous nematode (Protorhabditis sp) into the open soil system with and without wheat to study the effects of bacterivorous nematodes and their interactions with roots on soil microbial biomass and microriocoenosis at different growth stages of wheat. The results indicated that, the inoculation of bacterivorous nematodes increased the content of SMBC, SMBN and SMBP by 26.4%, 32.9% and 21.8% respectively, and the difference were obviously in most treatments except some treatments of bulk soil and soil without plant. The content of SMBC, SMBN and SMBP in rhizosphere soil were much more than that in the bulk soil and soil without plant. The influence of nematode inoculation on SMBC, SMBN and SMBP was in the sequence of SMBN> SMBC> SMBP, and the influence of nematode inoculation on SMBC was most obvious in rhizosphere soil. The inoculation of bacterivorous nematodes had significant effects on bacteria, fungi and actinomycetes number. The bacteria number significantly increased in treatments with nematodes except in rhizosphere soil at seedling stage of wheat. The influence of nematode inoculation on fungi and actinomycetes number was bigger than on bacteria number, the fungi and actinomycetes number were increased by 48.5% and 68.2% respectively. There was no significant correlation between bacteria number and SMBC content in all treatments, while there were significant correlation between fungi number and SMBC content in rhizosphere soil and bulk soil and significant correlation between actinomycetes number and SMBC content in soil without plant.
Forage strategy of the Przewalski′s gazelle (Procapra przewalskii) under selenium stress
硒胁迫下普氏原羚的采食对策

SHEN Xiao-Yun,<br>申小云
生态学报 , 2009,
Abstract: 通过对青海湖湖东地区土壤和牧草矿物质元素含量的分析,发现该区严重缺硒.然而,生存于湖东地区的普氏原羚却不见缺硒表症,普氏原羚在长期的进化过程中适应了缺硒环境.提出假说:普氏原羚应对硒胁迫的主要对策是选择采食高硒植物, 在湖东地区,牧草硒含量是影响普氏原羚选择食物的主要因素.得出结论:在湖东地区,芨芨草是普氏原羚的基本食物,同时是主要的高硒植物.普氏原羚应对硒胁迫的主要对策是选择芨芨草草地作为采食地,增加高硒植物芨芨草在食物中的比例.也不是嗜食或喜食高硒植物.
The Northwestern Development of the Nationalist Government in the War of Resistance Against Japan
抗日战争时期国民政府的西北开发

SHEN Xiao-yun,<br>申晓云
浙江大学学报(人文社会科学版) , 2007,
Abstract: 国民政府时期的西北开发分抗战前和抗战时两个阶段,战前的开发是战时开发的基础,战时的开发是战前开发的继续.国民政府战前的西北开发固然取得了一些成就,但也存在不少问题,其中有资金、人才不足的客观因素,也有建设经验不足、急功近利的主观原因.而国民政府战时再掀的西北开发热潮,则是在总结了前期开发教训基础上,将抗战与建国并举,以抗战促进开发,以开发支持抗战,贯彻因地制宜、合理开发原则,取得的实绩充分证明了西北建设必须坚持科学指导、理性开发的重要性.
LASING FROM A DYE-DOPED PENDANT DROP AND ITS PRECESSION

Pu Xiao-yun,Lee Wing-Kee,<br>
中国物理 B , 2000,
Abstract: We have observed lasing from the rim of dye-doped ethylene glycol pendant drops. Spatial-resolved spectral measurements show that the lasing wavelength varies along a vertical rim of the drop. Time-resolved measurements indicate that lasing precession occurs within the drop. Various lasing patterns due to lasing precession are explained. The measured precession periods for different pumping points are in good agreement with the calculated values based on morphology-dependent resonance theory.
Research of Point-based Rendering
点模型及其绘制技术研究*

WANG Xiao-yun,<br>王晓云
计算机应用研究 , 2005,
Abstract: Point model is a new representation of 3D models. Com pared with traditional triangle meshes, point models are suitable to represent irregular objects with complex geometry. For such objects, the technique of point -based rendering brings both high efficiency and high quality. This paper discu ssed the concept of point model, followed by an introduction to the base idea an d base steps, and acceleration of point-based rendering. Presents a prospect of its future research.
Progress and Prospect of Some Fundamental Research on Information Security in China
Deng-Guo Feng,Xiao-Yun Wang,<br>Deng-Guo,Feng,and,Xiao-Yun,Wang
计算机科学技术学报 , 2006,
Abstract: With the development of network and information technologies, information security is more and more widely researched in China. To know where the work is and where it goes, we focus on comprehensively surveying the twenty years of important fundamental research by Chinese scholars, and giving, from our point of view, the significance as well as the outlook of future work. Some of the reviewed work, including the researches on fundamental theory of cryptography, cryptographic algorithm, security protocol, security infrastructure and information hiding, greatly advances the related sub-fields, and is highly recognized in and outside of China. Nevertheless, the overall work, we think, is still facing the problems of unbalanced development of sub-areas, limited scope of research, lack of systematic work and application, etc., leaving much room for improvement in the near future.
Ecological safety pattern of spatial extension in Shenyang City
沈阳市城市空间扩展的生态安全格局

LI Yue-hui,HU Zhi-bin,GAO Qiong,XIAO Du-ning,HU Yuan-man,MU Yang,GUAN Zhu-xin,ZHANG Xiao-yun,<br>李月辉,胡志斌,高琼,肖笃宁,胡远满,穆阳,关竹心,张小云
生态学杂志 , 2007,
Abstract: Based on the change patterns of 6-period urban configuration in Shenyang City from 1956 to 2004 and their cause analysis, 6 ecological factors including geomorphology, land sinking, water body (river system and paddy field), forestland, basic farmland, and soil pollution were selected to divide the spatial extension of Shenyang City into preferred, suitable, confined, and strictly prohibited classes. The ecological safety pattern of Shenyang City was established to decide the direction and trend of urban growth with ecological safety. The results showed that Shenyang City was continuously extended from 1956 to 2004. Before 2000, the city was mainly extended to both northeast and southwest along Hunhe River, while the growth direction focused on the south, and the Hunnan New Strict was exploited from 2001 to 2004. During the early period of city development, the spatial pattern of Shenyang City was almost formed by industrial productivity distribution, with politic and economic factors as dominant ones and got to 291 km2 in 2004. Thereafter, ecological factors became the restricting factor in the city extension. The ecological safety pattern showed that the east and west of Shenyang were the restricting directions, while the north and south, as well as the southwest, had more spaces available. The south could be the main extension area of Shenyang City.
A New One Unit Repairable System
一种新型的单部件可修系统

TANG Ying-hui,LIU,Xiao-yun,<br>唐应辉,刘晓云
系统工程理论与实践 , 2003,
Abstract: This paper considers a one unit repairable system with multiple repairman vacations. If the system fails the repair starts immediately unless the repairman is in vacation time, in which case a waiting repairable time is needed. So that the system may be in one of three states: the working state, the waiting repair state and the being repaired state. Under the assumptions, the following reliability problems are discussed: 1) The point-wise availability and the stead-state availability ; 2) The expected failure number during a given $(0, t]$ and the stead-state failure frequency. Some important reliability results are obtained.=$ and the stead-state failure frequency. Some important reliability results are obtained.=
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