我国房地产泡沫与金融支持的相关性研究

在我国资本市场改革发展进程中,房地产泡沫日益显现,通过构建衡量我国房地产金融支持过度的评价指标,建立向量误差修正模型,对房地产泡沫与金融支持进行了实证分析,并围绕如何防范房地产泡沫提出了风险预警指标和加强内部监控等建议。     

河北省生产性服务业集聚水平的测度与分析

生产性服务业是打造中国产业升级版的"利器",是河北省实现产业格局由"河北制造"向"河北服务"转变的必然选择。本文首先介绍了河北省生产性服务业的发展现状,然后基于区位熵指数法,对河北省七大生产性服务业及河北省各地级以上城市的生产性服务业集聚水平进行了测算与分析,发现其发展在行业和地区上分布不均衡,最后提出了促进河北省生产性服务业发展的对策建议。     

纠错行为对虚拟语气学习的影响

教师在进行虚拟语气教学时,应根据学生的情况选择适当的策略,调动学生的纠错行为,并保证纠错的及时性、准确性、互动性。     

体积管检定误差来源的探讨

从体积管检定过程中出现的气体进入,液体泄漏,电子、机械部件的复现性,体积管内壁结蜡及其他方面,分析了体积管检定的误差来源,提出了一些改进措施,为规范体积管检定程序,减小检定误差提供了理论指导及实践经验。     

PCM遥测帧同步技术性能分析

在分析假同步和漏同步现象的基础上,介绍了脉冲编码调制（PCM）遥测帧同步工作的三态逻辑转换过程,通过进一步简化搜索态重叠区假同步概率计算公式,重新对搜索态和校核态的帧同步工作性能指标进行理论建模和仿真,根据仿真结果对影响帧同步性能的相关因素和参数进行讨论,为帧同步参数设计提供参考。     

Grader Bias in Cattle Markets? Evidence from Iowa

Live cattle are increasingly priced as an explicit function of U.S. Department of Agriculture yield and quality grades. Human graders visually inspect each slaughtered carcass and call grades in a matter of seconds as the carcass passes on a moving trolley. We examine whether there is systematic bias in grade calls using a sample of loads delivered to three different midwestern packing plants during 2000–2002. Overall, results indicate that indeed there is a bias, and that grading standards vary significantly across packing plants. Results also are consistent with a behavioral model where graders are more accurate when grading relatively low-quality carcasses.     

卷积码混合ARQ系统的自适应最优子包传输

针对有突发性错误的卷积码混合ARQ系统,提出了一种估计最优子包数的有效方 法以及自适应子包传输方案。在理论分析最优子包数的基础上,对卷积码系统采用自适 应子包传输后的性能进行了仿真验证。仿真结果表明,在动态信道中,自适应子包传输方案 可使系统根据不同信道条件,采用不同的最优子包数可达到最大的吞吐量。     

相位噪声对PSK系统性能的影响

在介绍相位噪声定义的基础上,分析了相移键控（PSK）接收系统的本振信号源相 位噪声对误码率的影响。以QPSK调制方式为例,仿真了相位噪声对系统误码率影响, 结果证明了接收系统中本振信号源相位噪声的重要性。以实际工程中使用的本振 信号源为例,推导了相位噪声和信号抖动所导致的BPSK和QPSK接收系统信噪比的限制。理论 分析与工程实践相结合,可以更好地得出相位噪声对PSK接收系统的影响,对接收系统的工 程设计具有一定的指导意义。     

对国际金融危机的再认识

我们对国际金融危机的预测是失误的,解读是失误的,教训的吸取也是失误的。本文指出,经济危机并非只和资本主义制度相伴随,只要存在三个必备条件,就会周期性地出现经济危机。尽管经济危机必不可免,但它具有三重革命性作用。中国应对国际金融危机为国际社会作出了重大贡献,但中国式的应对定会产生许多中国式的问题和困难。     

Valuing a multistate river: the case of the River Murray*

The River Murray and the Coorong in Australia have been in a state of decline. With the prospect of extended droughts and shifts in inflows due to climate change, difficult choices loom. The options include halting the decline, triage of some assets along the River or staying with the declining river system. To support decision‐making, a survey was designed to elicit willingness to pay for improvements in environmental quality. Over 3000 Australians responded to this survey. The study focuses on key River Murray environmental quality indicators: the frequency of bird breeding along the River Murray, increasing native fish populations in the River Murray, increasing the area of healthy vegetation along the River Murray, and restoring water bird habitat in the Coorong. State/Territory models were jointly estimated using a panel multinomial logit error‐components model. Willingness to pay estimates for improvements in environmental quality were calculated for the River Murray and the Coorong. Respondents were found to be willing to pay most for the Coorong and to improve waterbird breeding frequency. Respondents from the Australian Capital Territory were found to have significantly higher willingness to pay whereas those in Victoria had a significantly lower willingness to pay than respondents in other states.