Close relationship with the supervisor may impede employee creativity by suppressing vertical task conflict

Leader‐member exchange as a form of supportive leadership is expected to foster employee creativity. However, empirical evidence suggested this relationship is complex. This study attempts to address this complexity by proposing and testing a curvilinear mechanism, which attenuates the overall positive effect of LMX on creativity by transmitting a curvilinear indirect effect via vertical task conflict. Results drawn from a sample of 276 supervisor–subordinate dyads provided support for the hypothesized curvilinear indirect effect. Specifically, LMX was found to negatively influence employee creativity by suppressing vertical task conflict for subordinates in high‐quality LMX relationships, while the indirect effect was not significant for subordinates in low‐quality LMX relationships.     

一种级联两箱通用数字预失真器及其辨识算法

提出了一种由单形规范线性分段(SCPWL)函数与记忆多项式级联的数字预失真器，并给出了复数域两步最小二乘参数辨识算法。不同于以往一种预失真器适用一种功放模型的情况，所提的预失真算法利用SCPWL函数的分段特性以及记忆多项式的非线性记忆特性，在完成参数辨识的同时自动地调整结构，可适用于传统以及强非线性新型功放模型的线性化补偿。将所提预失真器分别应用于传统记忆多项式、两箱模型以及新型包络跟踪功放。经过计算机仿真，功放输出的幅频特性和频谱曲线表明所提预失真器能够有效地补偿多种功放的非线性特性。算法仿真比较结果也表明，针对包络跟踪功放，所提复数两步最小二乘算法的邻道泄漏比(ACLR)可改善约35 dB，性能优于最小均方(LMS)类算法约30 dB。     

International trade of GMO-related agricultural products

This paper examines the international trade of a variety of genetically modified (GM) food products over a 27-year period (1984–2011) with data from the United Nations using the tools of social network analysis. The results indicate that each of the different crops have a distinctive pattern of trade that has changed over time due to a number of different factors. Also, trade in agricultural commodities became more diversified over time, dominated less by the United States and other nations central in the trade networks and trade in the individual GM crops was stable over time. Countries maintained their trading partners for specific crops, despite the adoption of the genetically modified varieties. The economic implications of these results are discussed for specific countries.     

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。     

我国炼油工业应实行改造与新建并举的方针

目前我国炼油工业的生产能力，特别是加工中东含硫油的能力严重不足，为适应国民经济发展的需要，扩大炼油能力十分必要，根据测算，2010年我国炼油工业的加工量应达到3亿吨，2020年达到4．5亿吨，若按开工率90％计，则2010年我国炼油能力应达到3．3亿吨，2020年达到5亿吨，因此，从现在开始的10年内，需新增炼油能力1亿吨左右，在下一个10年，即2010至2020年，还需新增能力1．5亿吨，根据我国国情，因地制宜，充分利用现有装置潜力通过技术改造来发展炼油工业是十分必要的，但是大型，先进，一体化是我国炼油工业今后发展的主要方向，兴建新厂可采用先进的工艺技术和新的管理机制，取得较高的经济效益，因此，我国炼油工业的发展实行技术改造与兴建新厂并举的“两条腿走路”的方针。     

全面整合旅游资源,推进广州旅游业的深度发展

<正> 广州旅游业发展到今天,已经完成了“基本原始积累” 的数量型发展阶段,实现了旅游产业化的飞跃。而在新的形势下,如何提升旅游业的综合竞争力,促进其向效益型、质量型的产业转变,引发新的飞跃,出路在于:全面整合旅游资源,推进旅游业的深度发展。     

论社会主义市场经济下主体道德人格的塑造

塑造适应社会主义市场经济的现代道德人格,是进行道德建设的重要内容。社会主义市场经济要求社会主体具有共同的理想和精神支柱、牢固的爱国主义精神、高尚的为人民服务意识。社会主义市场经济要求社会主体高扬集体主义旗帜,具有坚定的法纪诚信观念和规则意识,并具备不断开拓进取的主观精神状态。     

论"入世"后我国农产品市场不利因素的逆转性

“入世”对我国农产品市场虽然会造成诸多不利因素，然而，这些因素将会得到逆转。这是因为：一方面，“入世”后，这些因素客观上具有逆转的必然性；另一方面，通过调整农村产业结构、扩大集约化规模经营以及实施各种利农政策，从主观上说，这些不利因素亦具有逆转的可能性。     

聚集纺纱工艺原理及优越性

聚集纺纱是一种新型纺纱技术 ,其在设备上的实现主要通过对传统牵伸装置的改进。 Rieter和 Suessen等设备采用多孔皮圈或透气的网格皮圈在气流的作用下聚集纤维 ,也有的设备采用大直径的有孔空心滚筒代替原有的前下输出罗拉 ,并在气流的作用下对纤维进行有效而又柔和的约束 ;同时介绍了聚集纺纱的优越性及其对后道工序的影响     

Tax-Induced Intra-Year Patterns in Bonds Yields

The ratio of the yields on short-term tax-exempt and taxable bonds exhibits a sawtooth pattern that is consistent with the impacts of tax deferments from dates on which interest payments are received to dates on which the resulting tax payments are paid. The effect of the tax deferment at turns of calendar years does not differ appreciably from the effect at the turn of any other tax quarter. Investors with tax payment schedules that differ from that of the investor that is indifferent between investing in taxable and tax-exempt bonds may benefit from tax-related timing strategies for investing in these bonds. Issuers may benefit from tax-related timing strategies for scheduling interest payments.