土质边坡分析中的极限平衡法与有限元强度折减法的研究

介绍边坡分析的极限平衡法与有限元强度折减法原理,比较两者优缺点。对均质土坡分别采用有限元强度折减法与极限平衡法进行计算,得到相应的安全系数和潜在破坏面,得到两种方法所得安全系数和破坏面一致的结论,应用有限元强度折减法计算是合理可行的。     

电子商务面临的法律问题

随着Internet的日益普及,电子商务得到了迅速发展,并日益形成为一个具有巨大发展潜力的市场。然而,电子商务的兴起也给我们带来了许多始料未及的问题,比如电子信函的法律地位问题、电子合同的法律效力问题、电子商务中的知识产权保护问题等。     

Robustly optimal monetary policy in a microfounded New Keynesian model

We consider optimal monetary stabilization policy in a New Keynesian model with explicit microfoundations, when the central bank recognizes that private-sector expectations need not be precisely model-consistent, and wishes to choose a policy that will be as good as possible in the case of any beliefs close enough to model-consistency. We show how to characterize robustly optimal policy without restricting consideration a priori to a particular parametric family of candidate policy rules. We show that robustly optimal policy can be implemented through commitment to a target criterion involving only the paths of inflation and a suitably defined output gap, but that a concern for robustness requires greater resistance to surprise increases in inflation than would be considered optimal if one could count on the private sector to have “rational expectations.”     

Off‐farm work,technical efficiency,and rice production risk in Taiwan

This article investigates the differences in yield production, production efficiency, and yield risk for farmers both with and without off‐farm work. Using a nationwide survey of rice farmers in Taiwan, we estimate two stochastic production frontier models that accommodate technical inefficiency and production risk simultaneously for farmers both with and without off‐farm work. The stochastic dominance criterion is then applied to compare the differences in the distributions of the estimated technical efficiency and yield risk between groups. The empirical results indicate that these two groups of farmers use resources in different ways, and off‐farm work is not necessarily associated with lower technical efficiency. For farmers in the lower percentiles of the efficiency distribution, those with off‐farm work are more efficient than their counterparts without off‐farm work. In addition, farmers with off‐farm work face higher production risk and this result is robust for the entire distribution.     

未来我国第三产业重点行业的选择与发展

通过分析我国选择第三产业重点发展行业的意义，以产业相对生产率为选择基准，认为旅游业等行业应在未来优化加快发展，同时提出了相关的政策建议。     

征地补偿中的几个理论问题

研究目的:现行征地制度的最大弊端是土地补偿标准过低,如何合理确定土地补偿标准仍是征地制度改革中需要解决的核心问题。本文旨在厘清地价形成和分配的理论基础。研究方法:逻辑推理法。研究结果:基于马克思地租理论和物权法的法理,对三种主要的地价形成和分配理论进行了讨论:(1)土地增值是由于土地用途的转换;(2)土地的外力增值不应归土地所有者,应归之于社会;(3)土地开发权属于国家或全民,开发收益应收归国家,由国家分配。研究结论:应当以当时当地土地正常的市场价格作为土地补偿标准。     

数字图书馆标准规范应用方案的设计——河北科技大学案例

在充分调研河北科技大学资源建设现状和用户需求的情况下,结合运用理论研究和专家调查法制订出河北科技大学数字图书馆标准规范体系的初步建议方案,并进行建议方案的可行性分析,提供一个普通高校数字图书馆标准的应用实践案例,从而促进标准规范在数字图书馆建设中的应用。     

一种适用于强脉冲噪声下的对数型恒模盲均衡算法

针对脉冲噪声下恒模算法(Constant Modulus Algorithm,CMA)失败的问题,通过分析脉冲噪声的影响,提出了一种基于最小均方（Least Mean Square,LMS）准则的对数型恒模算法（Logarithmic-type CMA,LT-CMA）。LT-CMA利用对数函数的非线性变换特性自适应地抑制强脉冲噪声对误差函数的影响,并且利用l2-范数进行信号归一化处理以增强算法的稳健性。仿真结果表明,所提出的LT-CMA可以适应于高斯噪声环境和脉冲噪声环境;与经典自适应均衡算法相比,在收敛速度和稳健性两方面上,所提出的LT-CMA都有显著的提升。     

商业合同附随义务根本违约之判断标准

当事人在商业合同中构成附随义务根本违约的判断标准包括:当事人之间须存在有效的合同关系,当事人一方或双方实施了违反附随义务的行为以及违约后果严重致使非违约方合同目的落空。但是,不是只要一方当事人的违约致使他方合同目的落空就必然构成根本违约,基础目的、单方目的、直接目的、初始目的、单一目的的落空必然构成根本违约;而效果目的、嗣后目的的违反不能构成根本违约;间接目的、双方目的和混合目的的违反只有危及合同的根基时才能构成根本违约。