“（V+O1）+O2”结构研究述评

"CV+O1)+O2"(动宾组合+宾语)结构是20世纪80年代以后使用日渐增多的一种语法现象,近些年来,研究者们对"(V+O1)+O2"结构展开了积极的探讨,得出了很多颇有价值的见解。本文试图对1999年以前及以后的对"(V+O1)+O2"结构的研究进行总结,以期对此结构进行多角度、多侧面的考察和分析。     

P2P Marketplaces and Retailing in the Presence of Consumers' Valuation Uncertainty

Can peer‐to‐peer (P2P) marketplaces benefit traditional supply chains when consumers may experience valuation risk? P2P marketplaces can mitigate consumers' risk by allowing them to trade mismatched goods; yet, they also impose a threat to retailers and their suppliers as they compete over consumers. Further, do profit‐maximizing marketplaces always extract the entire consumer surplus from the online trades? Our two‐period model highlights the effects introduced by P2P marketplaces while accounting for the platform's pricing decisions. We prove that with low product unit cost, the P2P marketplace sets its transaction fee to the market clearing price, thereby extracting all of the seller surplus. In this range of product unit cost, the supply chain partners are worse off due to the emergence of a P2P marketplace. However, when the unit cost is high, the platform sets its transaction fee to be less than the market clearing price, intentionally leaving money on the table, as a mechanism to stimulate first period demand for new goods in expectation for some of them to be traded later, in the second period, via the marketplace. It is not until the surplus left with the sellers is sufficiently high that the supply chain partners manage to extract some of this surplus, ultimately making them better off due to a P2P marketplace. We further analyze the impact of a P2P marketplace on consumer surplus and social welfare. In addition, we consider model variants accounting for a frictionless platform and consumer strategic waiting.     

纳米TiO_2的制备及光催化性能研究

本文采用水热法制备了高分散的纳米TiO2粒子,方法新颖、快速、简单。利用XRD对其进行表征。以TiO2作为光催化剂,在紫外光的照射下,系统考察了不同催化剂、催化剂用量、溶液初始pH值等因素对水中水杨酸降解率的影响。     

纳米VO_2/PEDT复合膜的制备及阻温特性的研究

将纳米VO2粉体与聚3,4-乙撑二氧噻吩复合,制备出一种新型的负电阻温度系数特性的聚合物基复合材料。通过计算复合膜简化模型的等效电阻网络,结果表明串联电阻结构有利于复合膜表现出高电阻相二氧化钒的电阻温度特性。同时,由于掺杂过的VO2粉体相和聚3,4-乙撑二氧噻吩导电聚合物相的共同作用,这种复合膜的电阻随温度变化量可达到一个数量级以上。最后,给出了复合膜的扫描电子显微镜图像结构。     

延迟性肌肉酸痛研究进展

延迟性肌肉酸痛是指人体进行剧烈运动或新的不习惯运动，特别是离心性运动后一段时间所出现的肌肉酸痛现象．其产生机制归纳为机械损伤及化学损害两种假说．其中细胞内Ca(2＋)浓度升高以及磷脂酶A2的激活在其产生过程中起主要作用，治疗延迟性肌肉酸痛关键是寻找强效的磷脂酶A2抑制剂．     

基于J2EE的Struts框价的研究与探讨

随着JSP技术的成熟,越来越多的人开始使用Web应用框架.Jakarta-Struts是一种比较成熟的框架,它为Java Web应用提供了基于模型—视图—控制器的框架,适用于开发大型可扩展的Web应用.针对Struts框架,介绍Struts框架的概念、模型,阐述与Struts相关的技术要点,并构建一个简单、实用的Web应用框架.构建的实例达到视图、控制、模型的分层,实现J2EE平台上的Struts架构.     

中国钢材市场分析及2010年预测

通过对中国钢铁工业钢材生产、进出口贸易及消费现状进行深入分析,根据中国宏观经济发展走势、相关产业政策,及其对下游主要用钢行业的影响,分析预测了2010年中国钢材市场总体发展前景.     

Bayesian Inference in Cointegrated I (2) Systems: A Generalization of the Triangular Model

This paper generalizes the cointegrating model of Phillips (1991) to allow for I (0), I (1) and I (2) processes. The model has a simple form that permits a wider range of I (2) processes than are usually considered, including a more flexible form of polynomial cointegration. Further, the specification relaxes restrictions identified by Phillips (1991) on the I (1) and I (2) cointegrating vectors and restrictions on how the stochastic trends enter the system. To date there has been little work on Bayesian I (2) analysis and so this paper attempts to address this gap in the literature. A method of Bayesian inference in potentially I (2) processes is presented with application to Australian money demand using a Jeffreys prior and a shrinkage prior.