11,477 research outputs found
Design and Implementation of the Monitoring and Early Warning System for a City’s Real Estate Market
自我国城镇房地产制度改革以来,商品房市场化进程加快。在商品房市场化进程加速背景下,房地产市场的繁荣成为国家经济快速增长的重要推动力量,也是我国国民经济的重要组成部分,从国民经济整体看,房地产开发投资占全社会固定资产投资比重较大是其要组成部分,从国民经济结构看,根据权威部门统计房地产行业对国民经济近四十个行业都有拉动影响。毫无疑问,房地产市场的波动对国民经济会产生较大影响。在这种情形下,如何把握房地产市场各个方面的运行态势,监测、预判市场运行异常态势,实现对房地产市场出现异常运行情况的预警就显得十分有必要。 随着我国房地产市场快速发展同时考虑到房地产作为国民经济的重要组成部分,建立能够实现房地...Since the reform of the urban real estate system in our country, the development of commercial housing market is speeding up. In this situation, the commercial housing market’s rapid development has become an important driving force for the national economy’s growth, and also an important part of China's national economy. From the national economy as a whole, real estate development investment acc...学位:工程硕士院系专业:软件学院_软件工程学号:X201323100
Study on the Glucose Isomerization and Separation of Glucose and Fructose
随着化石资源的大量消耗,人们普遍意识到要需要寻找一种洁净绿色可再生的资源来替代传统资源。其中,生物质被认为是唯一可以替代化石资源获取燃料、化学品和材料的可再生资源。糖类是生物质中最重要的组成部分,使用糖类作为原料可以制得一系列高附加值化学品。近年来,由碳水化合物转化为5-羟甲基糠醛(HMF)和2,5-二甲基糠醛(DMF)的研究获得了国内外科学界和工业界的广泛关注,而由碳水化合物中的果糖进行转化相较于以葡萄糖作为原料具有明显优势。相关研究表明,葡萄糖果糖的异构化过程是由葡萄糖脱水形成HMF的重要中间步骤,即,果糖是葡萄糖脱水反应的重要中间态,果糖的生成控制了葡萄糖脱水反应生成HMF的反应进程。易...In recent years, biomass is considered to be the only renewable resources in nature to replace the fossil resources for the production of fuels, chemicals and materials. The conversion of carbohydrates that are the most abundant components of biomass into 5-hydroxymethylfurfural (HMF) and 2, 5-dimethylfuran (DMF) is one of the most important pathways for the utilization of biomass, which has attra...学位:理学硕士院系专业:能源研究院_能源化学学号:3242012115213
A study about the impact of overpression of Oct4 and Sox2 gene on gastric cancer cell biology and oncology characteristics
目的:通过构建过表达干细胞因子Oct4和Sox2的胃癌SGC7901细胞株,研究过表达干细胞因子Oct4和Sox2对SGC7901胃癌细胞干细胞特性、肿瘤学特性、及生物学特性的影响,并探讨Oct4及Sox2在肿瘤细胞中的作用机制。 方法:1.构建携带Sox2基因的重组质粒,慢病毒载体感染SGC7901-OCT4细胞株得到SGC7901-OCT4-SOX2稳转细胞株。2.利用荧光定量PCR、western–bloting检测过表达Oct4及Sox2的胃癌SGC7901细胞中胃癌干细胞标志基因表达情况。3.细胞增殖和耐药实验、细胞划痕实验、Transwell细胞迁移和侵袭实验、球形克隆形成实验分...Objective: To explore the Stem cell properties and Oncology properties and Biological characteristics of the gastric cancer SGC7901 cell lines by stem cell gene Oct4 and Sox2,and study the mechanism of Oct4 and Sox2 in Tumor cells we construct gastric cancer SGC7901 cell lines into which stem cell gene Oct4 and Sox2 is transfected. Method: 1.Constructed the pHL-hH1-Sox2 and get the SGC7901-OCT...学位:医学硕士院系专业:医学院_外科学学号:2452012115317
CEO Succession, Strategic Change and Motivation
CEO是负责日常经营的高级管理人员。随着欧美国家企业治理制度不断完善,为应对复杂多变的企业环境和全球化趋势,CEO应运而生。 本文运用实证研究方法分析了CEO继任对战略变革的影响、CEO实施战略变革的动机,同时进一步研究了CEO继任和战略差异度对企业绩效的影响。 本文选取沪深两市2007-2013年上市公司的数据作为样本。通过回归分析探究,本文得到了以下几个结论:(1)发生CEO继任的公司的战略变革幅度有明显增加,企业绩效在CEO继任对战略差异度影响的过程中起到调节作用;(2)CEO外部继任与战略差异度显著正相关,说明外部聘请的CEO更容易实施战略变革,且战略变革幅度较大;(3)本文针对变...In the west, accompanied with the continuous improvement for the system of administration, CEO appeared. It’s the result of system innovation for answering the increasingly complex globalization trend of management environment change. This article mainly focuses on the relationship among CEO succession, strategic change, and motivation. We use empirical methods to analyze the influence of CEO su...学位:管理学硕士院系专业:管理学院_会计学学号:1752014115111
Preparation of Microporous Organic Polymers and Their Properties of Gas Adsorption
微孔有机聚合物拥有较多尺寸小于2nm的微孔结构,具有较高的比表面积、大的孔体积、低的骨架密度、高的化学稳定性等优势,因此在气体吸附与存储、催化等领域具有潜在的应用价值。近十年来,微孔有机聚合物得到了快速的发展。微孔有机聚合物依据其结构不同可分为:超交联微孔聚合物(HCPs)、共轭微孔聚合物(CMPs)、共价有机骨架(COFs)和固有微孔聚合物(PIMs)。目前,面临的主要难题是部分微孔有机聚合物的合成需要用到过渡金属或贵重金属催化剂,昂贵的单体,无法大规模生产。因此,本论文中,我们采用一些低成本的单体作为构筑单元,采取简单有效的合成策略制备一系列高比表面积的微孔有机聚合物,并研究了这些微孔有机...Microporous organic polymers (MOPs), with pores smaller than 2 nm, are the forefront of materials research due to their potential applications in gas storage and capture, catalysis. MOPs have some advantages such as high specific surface area, large pore volume, low skeletal density, high thermal and chemical stability. Over the past decade, MOPs have been rapid development. According to their dif...学位:工程硕士院系专业:材料学院_工程硕士(材料工程)学号:2072013115009
Design and Implementation of High School Student Achievement Management System of Fanjing Mountains
随着我国教育体制的改革与创新发展,特别是初高中教育大众化后,学生数量急剧增加,学生管理工作面临着诸多问题与情况。学生管理作为一项复杂的工作不仅涵盖了学生的基本信息,还包含了学生在校期间的各种成绩、参与活动等综合信息的管理。尤其是学分制与选课制的普及,学生管理的工作日益繁重与复杂。使建立一个高效、灵活的与自身特点与需要相适应的管理信息系统显得更为迫切。在学生管理工作中,引入信息化管理,不仅可以提升学生管理工作的效率,并且提高管理质量,对整体提升中学校的学生管理工作水平具有十分重要的意义。 本文以我国中学校的学生管理政策为出发点,结合现行的学生管理模式,借鉴现有的先进信息系统的开发经验,通过对学...Along with the reform and development of education system in our country, especially in the beginning of high school education, the number of students is increasing rapidly. Student management as a complex work not only covers the basic information of students, but also contains the students in school during the various grades, participation in activities and other comprehensive information manage...学位:工程硕士院系专业:软件学院_工程硕士(软件工程)学号:X201223103
Design and Implementation of Vehicle Management System for a Court Based on Web
传统的法院车辆管理以粗放的人工管理为主,在城市空间大大拓展,经济和社会活动活跃的今天,容易造成车辆的调度和管理混乱等问题。通过基于Web的车辆管理系统,可以方便地在网页上查询、申请、审核和分配车辆,有效地提高了法院车辆管理效率和透明度。本文调研车辆管理系统现状,研究了LAMP架构、Python编程语言及其Web开发框架Django、Apache服务器和PostgreSQL数据库等网页开发技术。在前期调研的基础上,针对法院车辆管理的实际需求,提出了系统开发目标,掌握了系统的业务需求,梳理主要的业务流程,并描述主要的功能性和非功能性需求。结合软件工程理论与实践,设计了B/S结构、对系统的架构、功能...Manual management is the mainly style of traditional courts vehicle management. Until recently, as the greatly expand of the urban space and the activities of economic and social, such management way is likely to cause confusion of vehicle scheduling and management issues. Through web-based vehicle management system, people can easily check, application, review and distribution of vehicles on webs...学位:工程硕士院系专业:软件学院_工程硕士(软件工程)学号:X201323050
Application of Stochastic Resonance Technology in Underwater Acoustic Detection
从七十年代至今,随着探索和开发海洋程度的加深,水声通信技术得到了迅猛地发展。水声信号的检测与增强是水声通信的关键技术之一。本文从随机共振理论具有在信噪比低的环境下能准确检测和增强弱信号的特点出发,将随机共振技术应用于水声探测信号的检测中去,以实现弱信号的增强。但经典随机共振理论是针对于低频周期信号开展研究的,而水声通信中的探测信号通常为淹没于各种不同噪声中的高频段Chirp信号。结合随机共振理论具有在信噪比低的环境下能准确检测和提取弱信号的特点,加入对系统参数选取的自适应算法,在高频段Chirp信号在水声通信的传输过程中,利用双稳态随机共振系统对信号进行预处理,实现海洋环境噪声能量到信号能量的...Since the seventy's, along with the development and utilization of ocean, underwater acoustic communication technology obtained rapid development.Detection and enhancement of underwater acoustic signal and is one of the key techniques of underwater acoustic communication. This paper focus on enhancing the weak signal based on the stochastic resonance theory can accurately detect and enhance the ch...学位:工学硕士院系专业:信息科学与技术学院_通信与信息系统学号:2332012115297
Translocation of Mixed lineage kinase domain-like protein to plasma membrane leads to necrotic cell death
在最近的研究结果中,混交激酶域蛋白Mlkl(mixedlineagekinasedomain-like protein)被确认为Rip3蛋白在细胞坏死信号通路中的下游蛋白。然而,Mlkl如何 在细胞坏死信号通路中行使怎样的功能,尚未明晰。通过在Mlkl基因敲除的细 胞中回补Mlkl蛋白进行一系列的研究,实验数据表明,Mlkl蛋白氨基端结构域 是其在坏死通路中行使功能的必要部分。在坏死过程中,Mlkl蛋白形成多聚体; 或者在细胞中利用分子生物学手段人为地诱导形成Mlkl蛋白多聚体,也能够引 起细胞坏死。并且,只有Mlkl蛋白的氨基端结构域,而非羧基端结构域部分的 多聚,可以引起细胞...Mixed lineage kinase domain-like protein (Mlkl) was identified as downstream of Receptor interaction protein 3 (Rip3) in Tumor Necrosis Factor alpha (TNFα) induced necrosis. However, the exact function of Mlkl in necrosis is largely unknown. By reconstituting exogenous Mlkl in Mlkl-KO cell, we found the integrity of Nterminus domain of Mlkl was required for it s normal...学位:理学博士院系专业:生命科学学院_生物化学与分子生物学学号:2162013015412
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