Preparation, modification and electrochemical properties of LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode material

LiNixCoyMn1-x-yO2作为层状正极材料，同时具有层状钴酸锂、镍酸锂和锰酸锂材料的优点。因其具有的成本低、容量高和环境污染小等特点，已经在某些应用上取代传统的钴酸锂正极材料。尽管如此，让LiNixCoyMn1-x-yO2具有更高的能量密度、循环稳定性和热稳定性仍是亟待解决的需求。 本论文选取Ni含量高的LiNi0.8Co0.1Mn0.1O2为研究对象，对其合成与表面修饰进行研究。本论文首先采用共沉淀法合成前驱体Ni0.8Co0.1Mn0.1(OH)2，然后高温煅烧出产品，通过优化合成条件，以获得类球形、电化学性能良好的LiNi0.8Co0.1Mn0.1O2正极材料；利用Li2MnO...The Ni-baesd layered cathode materials, such as LiNixCoyMn1-x-yO2 (NCM), have been considered as one kind of promising cathode material. They posess the similar advantages of layered LiCoO2, LiNiO2 and LiMnO2. The Ni-based layered cathode materials have replaced LiCoO2 in some fields due to their low cost, high energy density and low toxicity. It’s urgent to find promising electrode material to sa...学位：工学硕士院系专业：能源学院_能源化工学号：3242013115229

A Research on the Inventory Manage of JF Ltd.

浆纸行业体量巨大、资金密集，是国民经济基础行业之一。2008年以来，受宏观经济增长放缓、前期产能集中投产、下游客户需求变化等因素影响，浆纸行业景气度大幅下滑，供需关系扭转，进入供大于求的阶段。激烈的市场竞争下，多数产品价格下跌，同时运营费用、人工费用、物流费用等期间费用难以缩减，企业生产经营困难重重。基于这样的市场环境，如何在实现企业经营目的的前提下合理的规划库存，避免库存跌价和多余的资金占用，是浆纸行业必须深入思考的问题。 本文以从事浆纸分销二十余年的JF公司为研究对象，运用供应链库存管理的研究方法从分销商的角度探索有效的库存管理策略。全文遵循提出问题——分析问题——解决问题的思路，首先从...Pulp & paper industry is one of the infrastructural industries of the national economy which has a huge size and intensive capital. Since 2008, be affected by the macroeconomic slowdown, the release of production capacity and the other factors, the pulp & paper industry fell sharply. The enterprises face a lot of difficulties, such as the rising of the period expense. It is an important question f...学位：管理学硕士院系专业：管理学院_工商管理硕士(工商管理硕士)学号：1792010115100

Clinical Research on “Gui” Acupuncture Method for Chronic Non-specific Low Back Pain

目的：比较“龟刺”与常规针刺方法治疗慢性非特异性腰痛的疗效差异，为临床上治疗本病提供新的治疗思路和方法。 方法：本研究采用随机分组单盲对照法对所选病例进行前瞻性研究，受试者来源于厦门大学附属中山医院演武分院六楼针灸科门诊，收集符合纳入标准的60例慢性非特异性腰痛患者，随机分为治疗组与对照组，每组30例。治疗组按照周然宓教授所创“龟刺”法的选穴与操作标准，对照组按照石学敏主编《针灸学》中治疗腰痛的选穴与操作标准分别进行治疗。两组均以治疗10次为一个疗程，隔两天治疗1次，每周治疗2次，共治疗1个疗程，为期5周。采用视觉模拟评分法（VAS）以及Oswestry功能障碍指数（ODI）对患者治疗前后的...Objective: To compare the difference between the “Gui” acupuncture method and routine acupuncture method in the clinical efficacy on chronic nonspecific low back pain. In order to carrying forward Professor Zhou’s academic thoughts and provide a way of thinking for the clinical treatment of this disease. Methods: A prospective study of the selected cases were performed by using a randomized, sing...学位：医学硕士院系专业：医学院_针灸推拿学学号：2452013115355

Research on the tax assessment — Taking Guangdong Province's H District office.SAT as an example

纳税评估是税收管理的重要内容和不可缺少的管理环节。国内外的实践表明，纳税评估在加强税源管理、降低纳税人涉税风险、增加税收收入等方面发挥了日益重要的作用。在国内，由于对纳税评估的客观规律性在不断认识和探讨之中，加上纳税评估制度的建立和具体实施时间不长，其重要作用还没完全得到发挥，并存在法律保障不足、制度保障不足、机构人员保障不足及信息化保障不足等亟待解决的问题。这些问题在基层国税部门开展纳税评估的具体实践之中也普遍存在。因此，加强对基层国税部门纳税评估研究，对进一步发挥纳税评估的职能作用，完善税收管理制度，有重要的现实意义。 本文结合当前工作实际，从理论、实践两方面对基层国税的纳税评估工作进行...Tax assessment is an important part of tax management and an essential management process. Domestic and international practice shows that, tax assessment increase in tax revenue, strengthen the management of sources, reduce the tax risk has played an increasingly important role. In domestic countries, due to the objective laws of tax assessment in continuous awareness and discussion, and establish...学位：税务硕士院系专业：经济学院_税务硕士学号：1552013115191

Design and Implementation of Real Three-Dimensional Urban Planning Support Platform

城市是人类活动最集中的场所，信息化已经成为城市发展与规划的主题， GIS是城市空间信息表达和管理的重要技术手段。近年来，基于GIS技术的各种 城市空间信息管理系统，如城市地下管线系统、土地利用管理信息系统等大多采 用二维平面的管理模式。城市规划涵盖内容广泛，包括城市居住区规划、城市中 心区规划、生态环境规划、历史文物保护规划、市政基础设施工程规划等。随着 现代城市从地面向地下空间、地上空间不断拓展延伸，多层次、立体模式管理逐 渐成为城市规划管理的发展趋势。 本文在对城市规划业务进行充分的考察和了解后，进行城市三维辅助规划平 台的设计和研究。首先在数据层面，对于建立平台所需的三维...Cities are the most concentrated place of human activity, information has become the theme of urban development and planning, GIS is spatial expression and management of information technology. In recent years, the variety of urban spatial information management system based on GIS technology, such as urban underground pipeline system, most land use management information system management model o...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201323145

近25 a 银川市城市化进程中热力景观格局演变分析

Abstract： Based on the Landsat images and statistical data，in this paper the urbanization process and thermal landscape dynamics of Yinchuan City were analyzed． The objectives of this study were as follows: ① To analyze the spatial and dynamic characteristics of urban thermal landscapes based on the landscape pattern index; ② To assess the influence of the urbanization process on the thermal landscapes; ③ To understand the relationship between the land use pattern and the land surface temperature ( LST) based on the distribution index． The results showed that there was a significant heat-island effect in Yinchuan City，and the high temperature area was consistent with the built-up area and the unused land． LST declined from the downtown to the suburbs，and an obvious difference of the dynamic characters of the thermal landscapes could be identified at the different stages of urbanization． LST for various land use had obvious discrepancies，the mean LST for the land use types was in a descending order of unused land，construction land，green land and water body． Different land use types had different thermal distribution at different stages of urbanization． The land use pattern influenced the urban thermal environment，especially the spatial distribution of green land and unused land affected LST more significantly

Selective hydrogenolysis of sorbitol on Ni/La202CO3 catalysts

采用共沉淀法制各了具有协同稳定作用的Ni/La2O2CO3催化剂，用于山梨醇选择性氢解为小分子醇的研究。采用X射线衍射、氢气程序升温还原、C02程序升温脱附和扫描电镜对催化剂进行了表征。考察了不同配比Ni、La的加氢位点和碱性调控对山梨醇氢解产物的影响。结果表明，Ni、La摩尔比为2：3时，山梨醇转化率达到98.6%，C2~c3多元醇的产率达到43.8%，催化剂经2次反应后对山梨醇的转化率仍高达90%。探究了催化剂从酸性到碱性调变过程中，山梨醇氢解的产物分布，并提出了反应路径

Optical limiting using Laguerre-Gaussian beams

We demonstrate optical limiting using the self-lensing effect of a higher-order Laguerre-Gaussian beam in a thin dye-doped polymer sample, which we find is consistent with our model using Gaussian decomposition. The peak phase shift in the sample required for limiting is smaller than for a fundamental Gaussian beam with the added flexibility that the nonlinear medium can be placed either in front of or behind the beam focus.Comment: 3 pages, 4 figure

基于量子级联激光器的ADN基液体发动机稳态燃烧CO特征浓度的实验测量

二硝酰胺铵(AND)作为一种绿色无毒推进剂已在固体推进剂以及液体推进剂领域得到一定程度的应用,是未来化学推进技术的一个新方向.目前我国正处于ADN基液体推进剂研究的起始阶段,对于其燃烧反应过程的研究是当前的一个研究重点.由于ADN基液体推进剂催化分解及燃烧反应过程复杂,相关的实验结果国内外公开文献发表较少,因此有必要开展ADN基液体发动机催化分解及燃烧反应的实验研究.本实验采用基于量子级联激光器的吸收光谱诊断技术,对ADN基液体发动机燃烧室内燃烧过程进行探究.CO是ADN基液体推进剂催化分解及燃烧反应的特征产物之一,通过测量ADN基液体发动机典型工况下CO的特征浓度,可以定量获得ADN基发动机...</p