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

PHLPP regulates the proliferation and differentiation of B cells

免疫系统是机体非凡的防御系统，能够在体内帮助人和动物抵御入侵病原体和清除体内肿瘤细胞。高等动物的免疫系统分为天然免疫系统和适应性免疫系统。顾名思义，天然免疫是与生俱来的，在进化上是保守的，起源于低等生物。天然免疫为机体抵御病原体入侵提供第一道防线，可迅速对大部分的病原体进行抵抗，但是不能提供长久的免疫反应，也不能特异性地针对特定的病原体。适应性免疫系统是脊椎动物所特有的，在出生后完成发育；并且只在宿主受到抗原刺激时才起作用。因此适应性免疫对机体抵御外来病原体和体内病变的肿瘤细胞起到了至关重要的作用。T细胞和B细胞是后天免疫的主要承担者，其中B细胞产生的抗体在维持体液免疫过程中发挥了主要的作用。...The immune system is the body’s defense system, it can protect host from invading pathogens and clears tumor cells .The vertebrate system is comprised of innate immune system and adaptive immune system. As the name suggests, the innate immune system is installed along with birth, and is evolutionarily conserved and primitive. The innate immune system provides the first line of defense against inva...学位：理学硕士院系专业：生命科学学院_细胞生物学学号：2162014115251

Design And Implementation Of Rural Bank Risk Supervision And Analysis System

近年来，村镇银行已逐步成为支持农村地方经济发展的主力军。村镇银行是指经过批准，依照有关法律法规，由境内外金融机构，境内非金融机构公司，境内自然人出资，主要是为当地农民，农业和农村经济的统筹发展建立提供金融服务的村镇金融机构。村镇银行作为新型银行业金融机构主要试点单位，拥有机制灵活，可以依托现有银行和金融机构的优势，自2007年以来取得了快速的发展。中国的农村金融市场，由于受供应短缺，竞争力不足态势，受规模小，服务面窄，技术薄弱等因素的影响，村镇银行信息化的建设工作，通常以满足企业的需求为主要方向，趋向于投资少，维护方便，所以几乎所有村镇银行的核心业务系统开发和绝大多数的风险信息管理系统的运行和...In recent years, rural banks to support economic development has gradually become the main force in rural areas. Rural Bank refers to the China Banking Regulatory Commission approved in accordance with relevant laws, regulations, by domestic and foreign financial institutions, domestic corporate non-financial institutions, financed by domestic natural persons, mainly for local farmers, agriculture...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201223089

声表面波气体化学传感器的应用及进展

声表面波气体化学传感器是直接在压电晶体表面上紧密地镀上叉指形换能器、然后在间隔或整片基片上覆盖一层选择性薄膜。它的谐振频率为100~400MHz气体的测定灵敏度可达ng级,分延迟式及谐振式两种。由于声表面波器件对环境十分敏感,所以多采用在同一石英晶面做成双通道延迟谐振式,不同点仅在用作检测气体的一组空间镀上膜或在同一膜上渗入能吸附被测定气体的化合物,然后两组谐振频率进行混频,差示出由于物质吸

Optimal decay rates of the compressible fluid models of Korteweg type

本文考虑的是可压Navier-Stokes-Korteweg方程。可压Navier-Stokes-Korteweg方程可用来描述可压等熵的，并具有粘性的毛细血管流的运动。本文主要通过Guo和Wang在【1】中的能量方法得到了可压Navier-Stokes-Korteweg方程在全空间上解的最佳衰减估计。特别的，我们还得到了解的高阶空间导数的最佳衰减估计。具体而言，我们使用带有最小导数计数的一族能量估计和插值定理得到可压Navier-Stokes-Korteweg方程解的最佳衰减估计，从而不必做线性估计分析。同时，我们发现可压Navier-Stokes-Korteweg方程解的负Sobolev范...This thesis is considered the compressible Navier-Stokes-Korteweg system, which is used to describe the motions of the compressible isothermal viscous capillary fluids. In this paper, we will use a general energy method developed by Guo and Wang in 【1】 to prove the optimal time decay rates of the solutions to the compressible Navier-Stokes-Korteweg system in the whole space. In particular, the opt...学位：理学硕士院系专业：数学科学学院数学与应用数学系_应用数学学号：1902009115227

Structural Study of 3C Protease from Enterovirus 71

肠道病毒71型是手足口病产生的主要病原体，同时还能导致神经性疾病的并发，而同属病毒柯萨奇A16型虽然也能导致手足口病，却不能诱发神经性疾病的产生。近年来，肠道病毒71型在中国的爆发流行，其神经性并发症的产生导致了100多个病人的死亡，因此肠道病毒71型的感染构成了对公众健康的巨大威胁。肠道病毒71型基因组通过一个单一的开放阅读框形成初始的多聚蛋白，多聚蛋白需要经过酶解以后才能组装形成有活性的病毒。对多聚蛋白的酶切主要通过两个功能酶来完成：2A蛋白酶和3C蛋白酶，两种酶都有其特定的酶切位点。2A蛋白酶进行对多聚蛋白的初次酶切，剩余的酶切工作则由3C蛋白酶和其前体3CD蛋白酶完成。由于人们对肠道病...Enterovirus 71(EV71) is a major cause of Hand, Foot and Mouth Disease(HFMD). It is also emerging as a neurotrpropic agent, whereas Coxsackie Virus A16(CAV16) has only been associated with uncomplicated HFMD. Recent break outs of EV71 claim death of hundereds of people only in China, so it poses a significancant public health threat. Genome of EV71 replicates large polyprotein through a single open...学位：理学硕士院系专业：生命科学学院生物医学科学系_生物化学与分子生物学学号：2162007115203

The dilemma of corporate culture development and solutions among state-own construction industry (taking X Construction and Investment Group as the case)

摘要 随着全球经济一体化的逐步加剧，企业间的竞争不再局限于市场、资本、品牌的竞 争，而是扩展到企业内在核心价值观的竞争。企业竞争优势的取得不仅仅依靠于科学管 理、合理架构、优秀人才，更重要的是企业自身核心价值观念。要想企业永续经营，稳 步发展，企业就必须依靠建立起自己独特的企业文化，让自身的经营价值观和文化被市 场接纳、包容。同时，通过企业文化将企业的核心价值观深耕植入员工心中，充分调动 员工工作积极性，凝聚全体员工的力量与智慧，树立企业品牌，打造企业形象，提升企 业效率，增强企业核心竞争力。 X建投集团为市属国有集团下属全资子公司，前身是一家名为YJ的建筑企业。 原YJ为集...Abstract With the acceleration of the global economic integration, competitions between enterprises are no longer just marketing,branding and capital, but the core values of every enterprise. The key to a successful business performance is not only scientific management, rational structure and talent seeking, the most important aspect is the core values of the organization. For the development o...学位：工商管理硕士院系专业：管理学院_工商管理硕士(工商管理硕士)学号：1792014115100