全空域球面相控阵测控系统的一种过顶跟踪方法

针对球面相控阵天线在跟踪高仰角过顶的动态目标时因方位角跳变引起的跟踪中断问题,提出了一种基于坐标系旋转的过顶跟踪方法。仿真表明,该方法很好地满足了相控阵天线角跟踪设计需要,能有效解决球面阵天线高仰角的跟踪过顶问题。目前,该方法已经成功应用于工程项目。     

Managing Multi- and Omni-Channel Distribution: Metrics and Research Directions

The increase in the variety of channel formats, and the progression from single, to multi-, then to omni-channel marketing has made shopping and buying more convenient for consumers, but trickier to manage for marketers—both upstream suppliers and downstream retailers. The first step in managing multi- and omni-channel distribution is to find the specific metrics that will facilitate reliable analysis of the relationship between distribution and marketing objectives. That is our primary goal in this article—to present the metrics, both old and new, that marketers, both suppliers and retailers, need to monitor, and that academic researchers, both theoretical and empirical, should incorporate in their models. We present a basic framework for managing distribution, and summarize the metrics that are relevant to each element of the framework. Then, we lay out what we believe are important questions that multi- and omni-channel marketers are grappling with, refer the reader to what existing academic research has to say about them, and suggest how future research can build off our framework and metrics to supplement what is known and address what is not.     

Seven Pillars of Business Ethics: Toward a Comprehensive Framework

This article first addresses the question of “why” we teach business ethics. Our answer to “why” provides both a response to those who oppose business ethics courses and a direction for course content. We believe a solid, comprehensive course in business ethics should address not only moral philosophy, ethical dilemmas, and corporate social responsibility – the traditional pillars of the disciple – but also additional areas necessary to make sense of the goings-on in the business world and in the news. These “new pillars,” that we advocate include moral psychology, organizational design and behavior, motivational theory, and a unit on how society, business, and law interact. This last unit builds upon the work of Francis P. McHugh (1988) who urged an integration of “disciplines related to business ethics.” Our seventh pillar would encompass an integration of law, socio-political theory, and policy to demonstrate how business helps construct its own regulatory framework. The concluding recommendation is for a comprehensive “Seven Pillars” of business ethics approach. William Arthur Wines holds a B.S.B.A. with distinction from Northwestern University and a J.D. from the University of Michigan. He is admitted to the practice of law in Minnesota and the State of Washington. His research has appeared in over three dozen journals including the American Business Law Journal, Arizona Law Review, Economics of Education Review, Delaware Journal of Corporate Law, Denver Journal of International Law and Policy, Journal of Business Ethics, Labor Law Journal, Marquette Law Review, Nebraska Law Review, and The William and Mary Journal of Women and the Law. He is the author of two volumes of readings in business ethics and “Ethics, Law, and Business”, published by Lawrence Erlbaum Associates, Inc. in 2006. This material is subject to various copyright laws. Please do not transmit electronically, quote, or copy without the prior written permission of the author.     

草地植被覆盖度变化及其驱动力 ——以甘南藏族自治州玛曲县为例

草地生态系统对区域的生态安全和可持续发展起着重要作用。植被覆盖度是衡量草地生态环境的 重要指标,其变化规律对生态环境建设和水土流失治理工作具有重要意义。通过对玛曲草地覆盖度数据进 行统计分析,得出以下结论:（1）2000～2010年,草地覆盖度整体呈减小趋势,并具有阶段性特征;草地 植被普遍存在退化趋势,低覆盖草地植被只局部有修复现象,出现稳定存在趋势。（2）玛曲草地覆盖度变 化的驱动因子主要有:光、热、水等自然因子,超载放牧以及社会经济因子。水热不匹配增加了草地蒸散 量,影响了植被的生长,进而影响了植被覆盖度的变化;鼠虫害对牧草和土壤的结构产生影响,致使草地 生态环境进一步恶化,降低了草地生产力;非法采药挖药,严重破坏了草地植被的完整性,这在一定程度 上是该地区植被覆盖度变化的重要因素之一;在经济利益的驱使下,牛羊数量逐年增多,草地负荷加重, 亦导致了植被破坏和植被覆盖度的降低。     

新闻报道是否会影响证券分析师盈利预测分歧——基于信息“噪声”的视角

文章以上市公司的百度新闻报道条数作为新闻报道指标,选择中国A股市场1776家股票作为研究对象,以2004-2012年为样本区间,实证检验上市公司新闻报道对证券分析师盈利预测分歧的作用及其影响机理,结果发现:上市公司的新闻报道与分析师预测分歧之间呈现显著的正相关关系;研究结论支持新闻报道本身含有大量"噪声"成分的解释,而不支持分析师"过度自信"的心理偏差的解释。     

Health care expenditures of self‐employed farm households in the United States

For self‐employed individuals and their families, purchases of health care services and health insurance policies have the potential to impact their health status, as well as the financial viability of their businesses. Most people in the United States receive health insurance coverage through employer‐sponsored programs. Self‐employed individuals and their households, such as farm households, may face a greater challenge in getting affordable health insurance. Using a large cross‐sectional farm household level dataset, we estimate the impact of the source of health insurance on health care expenditures of farm households in the United States. Results suggest that farm households purchasing individual health insurance directly from vendors are likely to spend more on health care than those with other sources of health insurance. After controlling for a variety of personal and local area characteristics, having health insurance was negatively related to total health care expenditures. Age and income, not surprisingly, were also found to be significant in explaining health care expenditures.     

多目标双重覆盖下的急救中心选址及其狼群算法求解

考虑到急救中心提供的急救服务的时效性以及服务的特殊性,通过优化急救中心选址和合理安排急救车数量,提高急救系统的运营效率,保证患者生命安全。结合实际情况对某地区当前急救服务进行改善,对当前急救中心进行优化,选址合适的候选点安排一定数量的救护车提供高效的急救服务,建立多目标双重覆盖模型,并设计狼群基因算法对其进行求解。算法采用游走、召唤、围攻等搜索方法,能够有效找到较优解,而且快速的邻域解的适应度计算方法确保了其搜索效率。以某区急救中心为研究对象,从候选急救机构中选择合适的医疗设施作为急救中心提供急救服务,并对每个急救中心的救护车数量进行管理,以满足居民日常急救就医需求,求解结果使区域医疗资源配置更加均衡,为探索建立分级诊疗和双向转诊机制打下基础。     

新常态下的国家审计变革与发展

新常态下,我国经济、社会、政治等各领域均发生了深刻的变革,国家治理出现了新动向、新变化,国家审计发展面临新的机遇与挑战,国家审计必须顺应时势、适时变革、创新发展。为适应国家治理的新变化,国家审计在理念观念、功能作用、范围重点、方式方法等方面均需突破原有限制,朝着价值理性审计、建设服务型审计、数字信息化审计、公权力全覆盖审计的方向积极变革与创新发展。国家审计在完善国家治理、保障国家安全、维护经济秩序、促进生态文明建设、完善宏观调控、加强廉政建设、推动依法治国以及促进深化改革等方面发挥着越来越重要的作用。     

A Dilemma between Liquidity Regulation and Monetary Policy: Some History and Theory

History suggests a conflict between current Basel III liquidity ratios and monetary policy, which we call the liquidity regulation dilemma. Although forgotten, liquidity ratios, named “securities-reserve requirements,” were widely used historically, but for monetary policy (not regulatory) reasons, as central bankers recognized the contractionary effects of these ratios. We build a model rationalizing historical policies: a tighter ratio reduces the quantity of assets that banks can pledge as collateral, thus increasing interest rates. Tighter liquidity regulation paradoxically increases the need for central bank's interventions. Liquidity ratios were also used to keep yields on government bonds low when monetary policy tightened.