基于AD9361的掌上型LTE RRU设计与开发

当前小体积远端射频单元（Remote Radio Unit,RRU）主要是皮站级别的Pico-RRU，其重量和体积仍然难以满足掌上型的要求。为此，采用高集成度的AD9361芯片来实现长期演进（Long Term Evolution，LTE）宽带收发信机功能，配合时钟同步模块、放大器模块和控制接口电路等一起构建低成本的掌上型RRU。主要解决了基于AD9516的时钟同步、低相位噪声设计和高灵敏度接收机设计三个技术难点，成功实现了掌上型、高性能、低成本的设计目标。整个RRU样机尺寸为18 cm×10 cm×2 cm，质量约500 g，量产成本千元以内。测试表明，该RRU下行误差向量幅度（Error Vector Magnitude，EVM）小于3%，优于3GPP要求的8%；10 MHz带宽时上行接收机灵敏度优于3GPP要求的-93.5 dBm。     

Relative-to-rival corporate philanthropy,product market competitiveness,and stakeholders

Unlike most of the literature that examines the relationship between corporate philanthropy and financial performance, this study investigates the mechanisms through which corporate socially responsible behaviors produce financial outcomes. We propose that corporate philanthropy improves corporate competitiveness by eliciting positive responses from stakeholders, who assess a firm’s philanthropic contribution in relation to its rivals to determine what level of support they wish to provide to the firm. We predict that a firm’s philanthropy relative to its rivals has a positive effect on its product market competitiveness, and that this positive effect is moderated by three conditions that influence stakeholder response: stakeholder attention to philanthropy, its perceived legitimacy, and expectations of corporate giving. Our predictions are generally supported by our analyses. Overall, this paper shows that strategic philanthropy has a quantitative dimension, and firms obtain the market competitiveness associated with corporate philanthropy by integrating their rivals’ positions into their decision making.     

Uncertainty,Control, and Karl Polanyi’s Protective Response

Post-Keynesian institutionalist economists like Wallace Peterson and John Kenneth Galbraith recognized that the impact of uncertainty on economic wellbeing depends in part on the degree of control people have over the sources and consequences of it. Given the inability of government and other large institutions to reduce uncertainty or to provide citizens with the ability to manage it, mediating structures are considered as an alternative means of promoting economic security. The article concludes by describing and evaluating several of these alternatives.     

What Prompts the People＇s Bank of China to Change Its Monetary Policy Stance？ Evidence from a Discrete Choice Model

In the present paper, we model the policy stance of the People＇s Bank of China （PBC） as a latent variable, and the discrete changes in the reserve requirement ratio, policy interest rates, and the scale of open market operations are taken as signals of movement of this latent variable. We run a discrete choice regression that relates these observed indicators of policy stance to major trends of macroeconomic and financial developments, which are represented by common factors extracted from a large number of variables. The predicted value of the estimated model can then be interpreted as the implicit policy stance of the PBC. In a second step, we estimate how much of the variation in the PBC＇ s implicit stance can be explained by measures of its policy objectives on inflation, growth and financial stability. We find that deviations of CPI inflation from an implicit target and deviations of broad money growth from the announced targets, but not output gaps, figure significantly in the PBC＇s policy changes.     

Independent Movement or Government Subcontractor? – Strategic Responses of Voluntary Organizations to Institutional Processes

The purpose of this paper is to identify factors that can explain differing responses of voluntary organizations to the pressure of homogenization that follows from interaction with public authorities. The paper is theoretically based on institutional organization theory and resource dependence theory, and empirically on research on voluntary organizations in the social sector. It is asserted that the following factors may explain voluntary organizations' ability to maintain autonomous in relation to public organizations: the characteristics of the organizational field, the focal organization's relations to the dominating organization in the field, organization characteristics and intra–organizational processes and strategies.     

The effect of exchange rate changes on trade balances in the short and long run

Using generalized impulse response functions, this study tests for the trade J‐curve for three transitional central European countries – the Czech Republic, Hungary, and Poland – in their bilateral trade with respect to Germany. Our findings suggest that for each country there are some characteristics associated with a J‐curve effect: after a (real or nominal) depreciation the export‐to‐import ratio briefly drops to below its initial value within a few months and then rises to a long run equilibrium value higher than the initial one.     

重大突发事件风险管理研究

当前，国际社会重大突发事件的风险性质正在发生剧烈的变化，只有了解和把握这些变化及其制约因素，才能够对此有一个准确、科学的认识。本文对国际社会重大突发事件风险性质的变化进行了概要性介绍，并从社会流动性和系统复杂性的提高，人类居所、活动或资产规模的增大和集中化，突发事件风险因素的变化，公共和私人机构处理风险职责的漂移，以及社会变化和对风险的理解等5个方面对重大突发事件的风险管理进行了探讨。     

Use of minimum risk approach in the estimation of regression models with missing observations

This article considers a linear regression model with some missing observations on the response variable and presents two estimators of regression coefficients employing the approach of minimum risk estimation. Small disturbance asymptotic properties of these estimators along with the traditional unbiased estimator are analyzed and conditions, that are easy to check in practice, for the superiority of one estimator over the other are derived. Received May 2001     

南京市重大危险源监管体系中的物流对策分析

根据南京市重大危险源普查报告,分析了南京市重大危险源的基本状况和监管中存在的问题,以提高应急物流反应能力为目标,分别从监管模式的改进、监管政策保障措施建设和重大危险源监管体系建设等三个方面提出了提高南京市重大危险源监管水平的对策措施。     

提高企业对外部环境适应能力的策略分析

企业的发展离不开外部环境,适者生存是企业发展的必然规律。因此,如何适应外部环境的变化并做出应有的响应,是企业发展过程中面临的重要课题,本文在提高企业对外部环境的适应能力方面进行了初步的探讨。