生产补贴、出口激励与资源错置:微观证据

生产补贴作为激励性政策工具,理论上可以实现促进出口的预期效果,但同时也可能造成资源错置。基于2005~2007年中国制造业企业数据,本文运用配对倍差法测算政府补贴对异质性企业出口行为的实际影响,并通过分析企业生产率离散程度和利用动态OP方法分解出生产率增长中的市场重置效应,刻画了生产补贴的资源错置效应。研究结果表明,生产补贴具有一定的出口激励作用但差异化特征明显,补贴的出口激励程度几乎呈现与补贴分配特征完全相反的结果,生产补贴存在典型的资源错置问题。霍英东教育基金会第十四届高等院校青年教师基金基础性研究课题(141085); 国家社会科学基金重大项目(12&ZD097); 国家自然科学基金青年项目(71203239); 国家社科基金青年项目(13CJL037); 教育部人文社科青年基金项目(12YJC790291)的资

福建省力学学科发展报告

介绍了福建省力学主要学科的研究进展、主要研究成果及在国民经济建设中的主要应用情况与存在的问题,简单介绍了福建力学学科整体在国内外的地位,展望了我省力学学科发展方向及其在海西建设中的作用

アルコールによるトリクロロエチレンの肝毒性増強作用

Article信州大学環境科学論集8:16-19(1986)research repor

一种聚变反应堆装置的新概念

本文提出了一个聚变反应堆装置的新概念,它由两个轴对称的类似串联磁镜的部分和两个螺旋仿星器U形弯曲段组成,并综合了直管和环形、快过程和慢过程的优点。文中研究了起动、过渡和运行阶段,讨论了D-D反应堆参数和稳定性。射频和高能分量只在起动阶段才需要,在整个过程中只有瞬时的能量消耗。端塞也只须在起动阶段存在,这大大降低了工程技术要求

第十八届美国理论与应用力学大会总结

1会议概况2018年6月5—9日,第18届美国理论与应用力学大会(18th U.S. National Congress of Theoretical and Applied Mechanics, USNCTAM2018)在美国芝加哥召开.本次大会由美国力学国家委员会和中国力学学会联合主办,旨在探讨和交流近四年世界范围内在理论和应用力学领域的基础研究、创新技术的最新进展,吸引了来自世界各地的近千名专家学

Study on Erosion Control Measures of Slopped Roads in Gullied Rolling Loess Area of the Loess Plateau

山坡道路连接农田、果园 ,对山区经济发展有重要作用。黄土高原山坡道路存在严重的水土流失 ,侵蚀方式主要有沟蚀、泻溜、崩塌、陷穴、悬沟侵蚀与滑坡等。山坡道路网应按照小流域综合治理规划合理布置 ,其主要防护措施 :①修筑梯田 ,防止坡面径流冲刷道路 ;②将路面整修成拱形以分散径流 ;③在道路内侧修蓄水窑窖 ,拦蓄径流 ;④路面及边坡栽植草灌 ,防止雨水冲

Electroless Polymerization of Aniline

提出了一种新的聚合方法———无电聚合。在没有外电流的情况下 ,溶液中的苯胺分子在具有催化活性的铂或钯基底表面上被溶解氧氧化为聚苯胺膜。与化学镀的原理类似 ,苯胺的无电聚合反应过程包含阴极半反应和阳极半反应两个电化学反应As a new method of polymerization,electroless polymerization was introduced to form polyaniline film on substrate of any shape.In electroless polymerization,aniline molecules were oxidized to form Pn film by soluble oxygen on the catalytic surface of Pt or Pd substrate without the supply of electric current.Similar to the mechanism of electroless plating,electroless polymerization of aniline involves local and spontaneous electrochemical reactions on only substrate.国家自然科学基金资助项目 !(5 99710 38

Electroless Polymerization of Aniline

提出了一种新的聚合方法———无电聚合。在没有外电流的情况下 ,溶液中的苯胺分子在具有催化活性的铂或钯基底表面上被溶解氧氧化为聚苯胺膜。与化学镀的原理类似 ,苯胺的无电聚合反应过程包含阴极半反应和阳极半反应两个电化学反应。As a new method of polymerization,electroless polymerization was introduced to form polyaniline film on substrate of any shape.In electroless polymerizaion,aniline molecules were oxidized to form polyaniline film by dissolved oxygen on the catalytic surface of Pt or Pd substrate without the supply of electric current.Similar to the mechanism of electroless plating,electroless polymerization of aniline involves local and spontaneous electrochemical reactions on the only substrate.国家自然科学基金资助项目 !5 99710 3

The study of pancreas three-dimensional reconstruction based on the Virtual Chinese Human-Female No 1

目的研究数字化虚拟胰腺及其周围结构图像的三维重建,创建三维可视化胰腺解剖学,为虚拟胰腺手术及临床胰腺外科提供数字化三维解剖学依据。方法采用南方医科大学虚拟中国人女性一号(VCH-F1)腹部胰腺段影像数据集,以现代看图软件(ACDSee)及图像处理软件(Photoshop)对图像进行分割,编程提取、三维重建胰腺并实现胰腺三维可视化。结果一次完成胰腺及与胰腺关系极为紧密的周围结构:十二指肠、胆总管、下腔静脉、门静脉主干及主要属支、腹主动脉、腹腔干动脉及分支、肠系膜上动脉的三维重建,并实现任意视角下的三维可视化,三维胰腺真实、立体感强,能三维可视化,以全新的胰腺三维结构反映复杂多变的胰腺外形及毗邻结构关系。结论基于VCH-F1的胰腺三维重建及三维可视化,以三维可视化的形式真实再现了胰腺及胰腺周围重要结构,是创建全新的三维可视化胰腺解剖学,虚拟胰腺手术及临床胰腺外科提供数字化三维解剖学依据的理想方法。Objective To study the three-dimensional(3D) reconstruction and 3D visualization of the pancreas and create anatomy of the digitalized visual pancreas so as to construct a concrete basis for virtual operation and surgical operation on pancreas.Methods The digital imaging data of pancreas,duodenum,common bile duct,arteries and veins were obtained from the Virtual Chinese Human-Female 1(VCH-F1) and processed using ACDSee and Photoshop so as to reconstruct 3D pancreas digitally and realize 3D visualization of pancreas.Results We successfully 3D reconstructed and visualized the pancreas and the peri-pancreatic structures: the duodenum,the common bile duct,the inferior vena cava,the portal vein vessels,the aorta,the ceoliac trunk vessels.The 3D and visualized pancreas manifested itself with its complete structure as well as its adjacency to other tissues.Conclusions The 3D reconstruction and 3D visualization of the pancreas based on the digital data of VCH-F1 produces a digitally visualized pancreas,which promises us a novel method for virtual operation on pancreas,clinical operation on pancreas and anatomy of 3D visualized pancreas.国家自然科学基金资助项目(30470493);; 广东省科技计划资助项目(2003C34303

An Electrochemical Study of Electroless Copper Plating Using Glyoxylic Acid as Reducing Agent

通讯联系人, Te:l ( 86-592) 2181436, E-ma il: smzhou@ xmu. edu. cn[中文文摘]以乙醛酸作还原剂, Na2 EDTA! 2H2O为络合剂, 亚铁氰化钾和2, 2 -' 联吡啶为添加剂组成化学镀铜液体系, 应用线性扫描伏安法研究分析了络合剂、添加剂对该镀铜体系电化学性能的影响. 结果表明, 络合剂N a2EDTA对乙醛酸的氧化和铜的还原有阻碍作用. 亚铁氰化钾和过量( 20 m g /L) 的2, 2 -' 联吡啶对乙醛酸的氧化起较明显的抑制作用.[英文文摘]The electroless copper plating using glyoxylic acid as a reducing agent, Na2EDTA as a che lating agent and K4 Fe( CN) 6 and 2, 2-' dipyridyl as additives was studied. The effect of chelating agent and addtives on the polangat ion behaviovs of copper reduction and glyoxylie acid oxidation were analyzed by linear sw eep vo ltammetry. The resu ltsm ainly demonstrated that the chelating agent h indered both the oxidation of glyoxylic acid and the reduction of copper complex ing ions. It has revealed that K4Fe( CN ) 6 and 2, 2 -' d ipyridyl( w ith the content over than 20 mg /L) both p layed negat ive actions on the oxidation of glyoxylic acid.国家科技攻关计划项目(2004BA325C);国家“973”项目(2002CB211804)资