The Relationship between Government Loans and Outward Foreign Direct Investment: A Comparison between China and Japan

政府贷款援助是中国援助事业的重要组成部分。在“一带一路”战略及企业“走出去”战略的实践中，如何利用政府贷款推进中国企业的对外直接投资是一个重要课题，在此方面，日本政府贷款有着丰富的经验。中日两国政府贷款援助的实施情况各有特色，通过对比中日政府贷款援助的异同点，以其与对外直接投资的关系为落脚点，可以进一步探索中国政府贷款援助机制内在的利与弊。 论文首先分析中日政府贷款本身的异同：具体包括贷款规模、贷款条件、捆绑度、受援国参与度以及项目的监督管理等方面，在此基础上，分析中日政府贷款在促进企业对外直接投资方面的作用机制，对比其中的差距。总的来说，由于所处经济发展阶段不同以及中国政府贷款历史较短，相...Government loan is an important part of foreign aid. In the practice of "going global" and "the Belt and Road" strategy, how to use government loan to promote business investment is an important issue. In this aspect, the yen loan has a wealth of experience. The loan policy and its implementation of China and Japan respectively has its own characteristics. Through comparing the similarities and di...学位：经济学硕士院系专业：经济学院_世界经济学号：1572013115195

日本对东南亚国家的援助:分析与评价

东南亚对于日本具有重要的经济、外交、安全和战略价值。二战结束以来,东南亚一直是日本对外援助的首要和重点地区。日本对东南亚援助以基础建设为主,关注民生项目,日本援助促进了双边贸易投资关系的发展,有利于推进东亚经济的一体化,也一定程度上增进了双边的政治互信和文化交流,日本对东南亚的援助取得了一定效果,但是仍存在贷款援助附带条件增多、援助部门分配比例失调以及技术援助效率较低等问题

继电器动态电阻在线检测系统设计

以继电器触点动态电阻作为研究对象,提出了一种动态电阻在线定性检测的方案,其创新点在于利用微分回路与比例回路将继电器触点动态电阻的峰值与稳定值检测分开。该系统经实验及应用结果表明所提出的继电器动态电阻检测方案可行

信贷政策结构性变化下的企业融资难问题——基于民营经济发达地区企业用信率的视角

企业"融资难"程度一直缺乏有效的度量指标,不利于信贷政策实施效果的评估。在获取了民营经济发达的浙江台州地区超过44万条企业授信和用信数据基础上,对可以反映企业"融资难"程度的用信率...教育部人文社会科学项目(16YJC790128);; 浙江省自然科学基金项目(LQ17G020002

不可压缩向列型液晶系统Cauchy问题整体强解的存在性和大时间性质

本文研究非齐次不可压缩向列型液晶系统在三维全空间上的Cauchy问题.对任意的β∈(1/2,1],当初值的范数■充分小时,本文证明整体强解的存在性及大时间衰减估计,其中初始密度可含真空或具有紧支集.国家自然科学基金(批准号:11601218,11771382和11671333)资助项

Design and measurements of the high gradient accelerating structures

The purpose of this thesis was to study on design and measurements of the high gradient accelerating structures. After introducing the main parameters to characterize Linacs we explained the application of the periodic accelerating structure. Then we studied TW accelerating structure operating at K-band frequency in order to linearize longitudinal space phase to increase beam brightness in the framework of the Compact Light XLS project in order to produce hard x-ray. We estimated group velocity as a function of frequency both analytically and numerically. Analytical results have a good agreement with the numerical results. The main parameters such as shunt impedance, quality factor (Geometric factor) and R/Q independently from the operating frequency for the TM010, TM110 and TM011 for a single cylindrical “pill-box” have been determined analytically as they provide accurate model for the accelerating structures. In order to characterize a normal conducting high accelerating structure with maximum gradients operating at X-band with extremely low probability of RF breakdown, an electroformed SW structures has been fabricated and characterized by SLAC and INFN with collaboration of other institute around the world at 11.424 GHz, coated with Au-Ni. We designed a gold plate RF high gradient structure operating at the X- band coated with Au-Ni. Bench measurements have been performed in the Department of SBAI of the University of Rome “La Sapienza”. The Slater method for the SW cavity has been employed in order to quantify the electric field inside the structure. Comparing the results with the results exposed from HFSS we report the features that have been quantified, showing good agreement. We continued working on the perturbation effect due to the aperture coupled between a waveguide and a cavity but for our application in SW multi-cell high gradient accelerating structure we studied on theoretical approach for reflection coefficient calculation in a SW cavity coupled to a waveguide. One method was based on circuit theory in which we found the overall Q of a resonant circuit for a cavity coupled to an external waveguide containing the RF generator. Q calculation led to the determining of the shunt impedance and consequently the reflection coefficient calculation. Comparison of the results shows a good agreement with the numerical results carried out by using the numerical code, HFSS. Another method of reflection coefficient calculation has been accomplished. We applied the modified Bethe’s theory presented by Collin and developed by De santis, Mostacci and L.Palumbo for TM01 mode cavities coupled by a small hole with a thickness size comparable to the wavelength. The amplitudes of forward and backward waves due to polarizabilites have been determined and we found equations for reflection and transmission coefficients. We demonstrated that our equation for reflection coefficient calculation is an analogous of the reflection coefficient obtained by Collin for TE10 using the circuit theory

Effects of Nd element addition on microstructure and mechanical properties of Ti-6Al-4V-2Cr alloy

本试验采用冷等静压法及粉末冶金法制备钛合金,消除了成分偏析对合金性能的影响。在Ti-6Al-4V-2Cr中加入稀土Nd元素并进行热处理,运用光学; 显微镜、XRD和TEM对其组织和性能进行观察和分析。通过观察发现合金的组织为均匀的alpha +; beta相。运用XRD和TEM观察发现,晶界和晶内均有Nd_2O_3析出物,Nd_2O_3的出现细化了晶粒,提高了形核率,降低了晶粒尺寸。运用精; 密万能试验机进行了力学性能测试,当Nd元素含量为1%时,合金的综合力学性能最好,合金的抗拉强度提高了10.7%,伸长率提高了49.1%。The Ti-6Al-4V-2Cr-xNd alloys were prepared by the cold isostatic; pressing method and powder metallurgy with addition of Nd element,the; effect of composition segregation on properties of the titanium alloy; was eliminated,and microstructure and the properties of the alloy after; heat treatment were studied by means of optical microscope,XRD and TEM.; The results show that the microstructure of the Ti-6Al-4V-2Cr-xNd is; composed of homogeneous alpha + beta phase. Nd_2O_3 precipitates are; observed in the grain boundaries and in the grains by XRD and TEM,and it; can refine the grains,increase the nucleation rate and decrease the; grain size. The optimal mechanical properties of the alloy are obtained; when the Nd content is 1%,and the tensile strength and elongation of the; alloy increase by 10.7% and 49.1%,respectively.军工863项目; 国防973支持项

Structural analysis and lightweight study for the five-axis grinder bed

以五轴联动工具磨床的床身为研究对象,分析了磨床在极限位置使用情况下床身的静态特性,找到了床身变形最大区域。通过自由模态分析和约束模态分析,得到床身各阶模态的振动特点,并从最大变形区域中选取一点进行谐响应分析,预测床身的持续动力特性。根据分析结果,找出薄弱环节,在保证床身动静态特性不降低的基础上对床身进行轻量化研究,最终减重7.73%,节省了材料与成本。With the five-axis grinding machine tool bed as the research object, the maximum deformation region can be found after analyzing the static characteristics in the use of the grinder limit positions.Through free modal and constraint modal analysis, the vibration characteristics of each order of the bed can be seen and a point in the maximum deformation region is selected to carry out the harmonic response analysis to predict the sustainable dynamic characteristic.According to the results of analysis, find out the weak areas in the bed and conduct the lightweight optimization on the condition of no reduction of static and dynamic characteristic of the bed.And finally, it reduces 7.73% of materials and prime costs.数控国家科技重大专项(2010ZX04001-162

人乳头瘤病毒16型病毒样颗粒的制备及其免疫原性研究

利用PCR技术从HPV16阳性阴道分泌物标本中获得HPV16 L1基因片段,并将其插入表达载体pTO-T7中,构建重组表达质粒pTO-T7-HPV16-L1;以该重组质粒转化大肠杆菌ER2566并表达HPV16 L1蛋白;所表达的HPV16 L1蛋白经过硫酸铵沉淀、离子交换层析和疏水相互作用层析等纯化步骤后,HPV16 L1纯度达到98%以上,并可在体外装配为直径50nm的病毒样颗粒;动物免疫原性研究结果显示,该病毒样颗粒可诱导高滴度的针对HPV16的中和抗体。上述研究结果表明通过大肠杆菌表达系统制备的HPV16病毒样颗粒具有纯度高,与天然病毒颗粒形态高度相似的特点,并具有高度免疫原性,可以应用于HPV16病毒样颗粒的结构功能研究及HPV16疫苗研发等领域

Effects of mowing plus waterlogging on germination and seedling growth of Spartina alterniflora

互花米草(Spartina alterniflora)是我国危害最严重的外来入侵植物之一,探索环保、经济、有效地防治互花米草的技术对保护我国海滩生态环境具有重要意义。本研究通过人工气候室(20~25℃)的盆栽实验,研究刈割与淹水对互花米草萌发和幼苗生长的影响。实验持续4个月,对互花米草地上部分进行了2次刈割,首次刈割是在互花米草生长季结束时,3个月后进行第二次刈割。首次刈割后持续淹水至实验结束,淹水处理设计0、5、10、20 cm四个淹水深度。首次刈割后各淹水处理互花米草根茎上迅速萌发克隆苗,种子的萌发比克隆苗晚约3个月。不同淹水深度对克隆苗的萌发和生长均有抑制作用,克隆苗株数、株高和地上生物量均随淹水深度增加而减少。第二次刈割后各淹水处理均没有再萌发克隆苗,但有少量种子实生苗,其中20 cm水深处理的实生苗数量最少。刈割加淹水可以很好地抑制互花米草的萌发和幼苗生长,据此建议互花米草防治方案为:在春季萌芽前,修筑堤坝,保持淹水20 cm,在营养生长期后期贴地刈割互花米草,继续淹水,第二年重复同样的刈割和淹水。为防止二次入侵,需要在邻近的互花米草分布区同时进行治理。&nbsp;</p