汽车工业及其产业政策效应的评估方法综述

通过文献分析,归纳出了当前对汽车工业发展及其产业政策效应的分析与评估方法研究的主要不足,为进一步研究汽车工业产业政策评估方法提供了立论依据.     

The Effects of Language Brokering Frequency and Feelings on Mexican‐Heritage Youth's Mental Health and Risky Behaviors

Language brokering is the communication process where individuals with no formal training (often children of immigrant families) linguistically mediate for 2 or more parties (usually adult family members and individuals from mainstream culture). This study examined the direct and indirect effects of language brokering on mental health and risky behaviors. Mexican‐heritage youth (N = 684) from schools in Phoenix, AZ, completed surveys at 3 waves from 7th through 8th grades. Language brokering frequency and negative brokering feelings were positively associated with family‐based acculturation stress, which was positively associated with alcohol use and other risky behaviors. Yet, brokering frequency was negatively associated with other risky behaviors, and positive brokering feeling was negatively associated with cigarette use. Implications for these findings are discussed.     

Effects of exercising before versus after eating on dieting and exercise evaluations: A preliminary investigation.

Psychological processes may play a role in the evaluation of the effectiveness of exercise and subsequent food intake. In order to further investigate this phenomenon, the effects of the timing of exercise relative to an eating opportunity were evaluated. Female undergraduate participants who were of average weight and did not exercise regularly were randomly assigned to one of three conditions (exercise before eating [n = 10], exercise after eating [n = 11], or no exercise [n = 12]). Expectations of the effectiveness of the exercise, value of dieting, and intake were assessed. Participants who exercised after eating had higher expectations of the effectiveness of the exercise than those who exercised before eating, while those who exercised before eating reported valuing dieting more than controls. No effects on intake emerged; therefore, there appears to be a disconnect between dieting appraisals and actual eating behaviour. The results are discussed in relation to theories on conflicting goals. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Sub-Compartmental Organization of Golgi-Resident N-Glycan Processing Enzymes in Plants

In all eukaryotes, the Golgi apparatus is the main site of protein glycosylation. It is widely     

Steric Crowding Makes Challenging C(sp3)-F Reductive Eliminations Feasible

A high-yielding fluorination of (triphos)Pt-R(+) has been achieved using an array of F(+) sources, with XeF(2) yielding R-F in minutes. The C-F coupling proved to be a stereoretentive process that proceeds via a concerted reductive elimination from a putative dicationic Pt(IV) center. The larger the steric congestion of the (triphos)Pt-C(sp3) (+) complexes, the more efficient the fluorination, seemingly a result of sterically accelerated C-F reductive elimination along with simultaneous deceleration of its competing processes (β-H elimination).     

基于Windows平台的微波折射率仪数据采集系统

给出了在Windows98下折射率仪数据采集系统的软件实现方案，介绍了在Windows98操作系统平台下如何通过虚拟设备驱动程序去控制折射率仪信号采集卡，并对本系统的应用进行了简单的描述。     

基于半导体光放大器全光波长转换器的研究进展

详细讨论并分析了三种以半导体光放大器为基础的全光波长转换器的优缺点，并介绍了一些改善性能的最新方案，最后作了一些展望。     

光纤通信系统中光源特性的模拟

利用单模激光器速率方程，对光纤通信系统中光源的静态和动态特性进行了数值模拟。研究了P-I特性和小信号模型下光源的调制响应，分析了信号传输速率、半导体激光器偏置电流和线宽增强因子对输出脉冲的啁啾特性的影响，从而有助于半导体激光器的设计和光纤通信系统的性能优化。