New N-Amido(thio)urea-Based Neutral Anion Receptors

分子识别是超分子化学领域研究的热点之一。因阴离子识别对于揭示生命过程中化学反应的本质具有重要意义，阴离子识别和传感研究备受关注。基于氢键作用的中性受体分子逐渐成为阴离子受体分子发展之主流，良好的阴离子识别性能是设计中性受体时考虑的关键因素；而评价受体性能的核心指标就是选择性和灵敏度。目前，提高中性受体阴离子结合性能的主要策略有四条：(1)增加氢键结合位点；(2)提高结合位点质子酸性；(3)借助静电引力的协同作用；(4)引入变构原理。本论文以N-酰胺基硫脲作为有效的阴离子结合位点，在传统阴离子中性受体研究的基础上，致力于探寻提高中性受体阴离子识别性能的新思路，并成功地构建了一系列具有良好阴离子识...Molecular recognition is one of the subjects receiving continuous interests in supramolecular chemistry. Since anions play a fundamental role in disclosing the essence of biological processes, anion recognition and sensing by synthetic receptors has received increasing recent attention. Especially, the development of neutral receptors based on hydrogen bonding has become a must for receptors of ...学位：理学博士院系专业：化学化工学院化学系_分析化学学号：B20032500

A Comparative Study of Two Chinese Versions of Vanity Fair in the Light of “Rewriting” Theory

《名利场》是批判现实主义作家萨克雷的传世之作，在该小说中作家描述了十九世纪上半页英国贵族阶级的生活百态，并批判了上流社会各色人等的糜烂生活。该书于二十世纪初进入中国，之后，各家译本层出不穷，其中50年代的杨必译本和90年代的彭长江译本最为引人注意。杨译本用词冼炼，颇具中国古典白话小说遗风，而彭译本则以其鲜明的异化特色博得了读者的青睐。为何两译本的特色如此不同？又是什么原因让两名译者选择了不同的翻译策略？带着这些问题，本论文作者决定对两译本进行比较以一探究竟。传统的译本比较方法侧重于语言分析和文本对照，并以对原文的忠实程度来衡量译文质量的好坏，很少涉及翻译活动如何在主体文化里面运作的问题。在这样...Vanity Fair is William Thackeray’s masterpiece, in which the author depicted a picture of the upper class of England in the first half of the 19th century and attacked the social order of the bourgeois world by satirizing the various individuals in different strata of the upper society. Since Vanity Fair was introduced to China in the early 20th century, various Chinese versions have come out, amo...学位：文学硕士院系专业：外文学院英语语言文学系_英语语言文学学号：1112005130026

The Analysis and Design of System’s Security Scheme for Ordinary Invoice Management Based on PKI

随着网络和信息技术的普遍应用与快速发展，我国税务系统信息化建设水平得到显著提高，各种基于网络的应用系统应运而生，大大降低征纳双方的成本，如何提高税收各应用系统的安全性是一个不容忽视的大问题。 本文研究目标是是探讨PKI技术如何在普通发票管理系统中的应用，该课题研究将为做好项目建设，提供相关的技术方案。 本文基于互联网的应用系统，主要实现了在线下载发票领购信息、在线开具通用机打发票、开票信息实时上传、在线获取发票结存信息等功能。系统的成功上线后，方便了纳税人也减轻了税务人员的工作量，同时还强化了税源监控力度，解决了申报不符的问题。 本文介绍国内外税务信息安全现状，研究PKI的相关理论，探讨...As the universal application and rapid development of network and information technology, the information level of taxation system has been improved significantly. How to improve the security of the application systems of taxation? The dissertation objective of this dissertation is to probe into the application of PKI technology in ordinary invoice management system, and provide relevant technolo...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201023067

A Modified DOE-2 Model for Typical Performance of Absorption Chillers and its Application

LiBr-water absorption chillers are commonly adopted in multifunction energy systems. The empirical part-load performance model for chillers presented by DOE-2 is one of the analytical methods to solve chiller performances. In this study, the applicability of the DOE-2 model for absorption chillers was analyzed. A modified DOE-2 model for double effect steam-driven absorption chillers, as an example, was developed and its reasonability and validity were tested by the product data and the general theoretical model. Application case study confirms the ability of the modified DOE-2 model to fast predict the part-load performances of absorption chillers

A High-precision Measurement Technique of Flat Mirror Profile Comprising Interferometers and Autocollimator

基于三组激光干涉光路与一台自准直仪的光学扫描检测方法,开发可用于大尺寸平面镜二维轮廓的高精度测量技术。通过联立线性方程式与最小二乘法结合的计算算法,可得到平面镜二维轮廓的测量结果及整个测量过程的不确定度值。利用建模仿真整个测量过程,分析不同采样点数n下不确定度数值的变化趋势。此外,搭建基于高精度三坐标测量仪平台上的光学检测系统,试验果表明该技术成功实现对100 MM平面镜二维轮廓的测量,并可实现重复性测量精度在±20 nM范围内。通过与zygO白光干涉系统结果的比较,该检测技术可以实现纳米级别的测量精度。An optical scanning technique comprising three laser interferometers and one autocollimator to measure a large flat mirror profile with high accuracy is described.The flat mirror profile and its measurement uncertainty are reconstructed by an application of simultaneous linear equations and least-squares method.The whole measurement process is numerically modeled by the computer simulation.Measurement uncertainties of the flat bar mirror profile are evaluated for different sampling numbers of the flat bar mirror.Moreover,a prototype of optical measurement system based on micro coordinate measuring machine platform is built.The experiment shows that the measurement technique successfully achieves the profile measurement of 100 mm flat mirror and repeatability of measurement accuracy within the range of ±20 nm.Comparing with the results measured by Zygo whitelight interferometer,this technique can achieve profile measurement in nanometer accuracy.国家自然科学基金(51075343); 国家知识产权局专利战略推进工程(ps2012-015)资助项

金融发展与资本错配:来自中国省级层面与行业层面的经验分析

基于Aoki (2012)的理论核算框架对中国省级层面与行业层面的资本和劳动错配系数进行测算,以及通过双向固定效应模型分别检验中国省级层面与行业层面金融发展与资本错配之间的关系,同时采用两步差分GMM和系统GMM进行稳健性检验,结果表明:无论是省级层面还是行业层面,金融发展与资本错配之间均存在\"倒U型\"关系;当金融发展处于较低水平时,资本积累速度加快会导致资本错配程度加剧,但当金融发展达到较高水平时,这种效应会发生逆转;外部融资依赖度高或投资密集度高的行业从金融发展中得到的受益最大,研发密集度高的行业虽能潜在地降低资本错配程度,但其效应在统计上不显著。为此,政府应当控制银行信贷规模,统筹各地区的金融发展水平;应当通过银行信贷、市场引导资本配置来鼓励和支持外部融资依赖度和投资密集度较高的行业,改善行业资本配置状况。国家社会科学基金一般项目“预期灾难冲击、宏观经济波动与中国财政货币政策工具选择研究”(16BJL028

N-(二茂铁酰胺基)硫脲类阴离子受体

我们将N-(苯甲酰胺基)硫脲类阴离子识别受体研究拓展至N-(二茂铁酰胺基)硫脲,设计合成了N-(二茂铁甲酰胺基)-N'-(取代苯基)硫脲(3a～3e,取代基X=p-OCH3,p-CH3,H,m-Br,m-CF3),其中二茂铁基系芳香性的电化学活性基团、“—NH—”为连接臂.研究的目的是进一步理解“—NH—”连接臂的特性和3a～3e作为阴离子的电化学响应受体的可行性.我们发现,3a～3e分子中的N'-苯环取代基不影响其半波电位(0.31Vvs.Ag/AgNO3);二茂铁环芳香质子和酰胺基—NH质子的核磁化学位移不受取代基的影响,而N'-苯基芳香质子和硫脲—NH质子的化学位移显著地受制于取代基;说明受体3分子中酰肼基N—N单键高度扭曲,阻碍了N'-苯环取代基电子效应传递至二茂铁基.我们观察到乙腈中3的氧化电位因阴离子如CH3CO-2和F-的结合负移200mV,二茂铁基芳香质子的化学位移向高场移动,意味着阴离子结合诱导了受体3分子中酰肼基N—N单键构型变化,使阴离子结合信息得以传递至二茂铁环.吸收光谱滴定实验表明,乙腈中3a～3e与阴离子结合时在约315nm处出现新的吸收峰,光谱红移达5820cm-1,阴离子如CH3CO-2和F-的结合常数在106mol-1?L,均远高于传统的二苯基硫脲类受体(1);我们还发现,尽管1和3a～3e分子中硫脲—NH质子酸性对取代基的依赖性相近,3a～3e之阴离子结合常数的取代基效应强于1.我们认为,这是由于N—N键的变构作用导致3a～3e的吸收光谱红移、阴离子结合常数和阴离子结合常数的取代基效应远高于传统的N,N'-二苯基硫脲类受体,因而体现了“—NH—”连接臂的独特性质

聚乙烯醇超选择性栓塞子宫动脉治疗子宫肌瘤

【目的】探讨聚乙烯醇超选择性栓塞子宫动脉治疗子宫肌瘤的临床疗效。【方法】收集22 例子宫 动脉栓塞术治疗肌瘤的患者, 观察临床表现。【结果】① 患者子宫体积均数、肌瘤体积均数在栓塞术前后变化 有统计学的差异( P0.05) 。③ 患者月经 量在栓塞术前后变化有统计学差异( P< 0.05) 。【结论】① 本疗法能有效地缩小子宫和肌瘤的体积; 改善月经 过多等临床症状。②本疗法对近期卵巢体积影响不大。③ 本疗法近期疗效良好, 远期效果有待进一步的研究。 ④ 本疗法有一定的副作用和并发症, 应加以重视