MIMO系统中基于卡尔曼滤波的信道预测算法研究

多输入多输出(MIMO)技术是LTE系统中的关键技术之一,能够在不增加带宽的情况下成倍地提高了通信系统的容量和频谱利用率。本文提出了一种多用户MIMO下行链路中基于卡尔曼滤波的信道预测算法。在实际传输时,发射端根据接收端反馈回来的信道信息预测出下一时刻的下行信道信息,仿真结果验证了所提方法的有效性。     

高职院校加强绩效管理的探讨

目前高职院校绩效管理存在目的和定位不准确,绩效管理基础工作不完善,绩效管理模式多为刚性模式,绩效反馈沟通缺失等问题。加强高职院校的绩效管理,应明确绩效管理的最终目的,做好绩效管理的准备工作,制定科学的绩效计划,进行持续不断的绩效辅导与沟通,开展客观公正的绩效评估,实施及时的绩效反馈沟通。     

三级生物质供应链的奖惩与回馈契约协调研究

为了优化生物质能供应链,降低成本,在无扰动因素情况,需求不确定且与价格有关的条件下,研究了由能源公司、基地和农户组成的三级生物质供应链中,奖惩与回馈契约对供应链的协调问题,建立了满足渠道协调的条件和供应链内各级参与者实现互赢的数学模型,最后将其用于数值算例中验证。结果证明契约参数的合理选择可以实现供应链各方利益最大。     

New insights into an old problem – enhancing student learning outcomes in an introductory statistics course

Many students enrolled in first year introductory statistics courses believe learning statistics is a waste of time and fear they will fail. In this study, we explored the impacts on learning outcomes for students in an introductory statistics course by allowing students to arbitrarily choose their own sequence of learning from three key learning activities, namely tutorials, Peer-Assisted Study Sessions and Computer-Managed Learning quizzes. Unlike the old regime where the learning activities followed a strict, rigid sequence, a new regime allowed students to freely choose when, where and how they engaged with the course learning activities. This allowed increased opportunities for students to receive relevant and timely feedback. Using a total of 1187 students enrolled in semester 2 of 2011, 2012 and 2013, data were collected on students’ scores from 7 assessment tasks. Our experimental design ensured as many course features as possible remained constant between the control cohorts (of 2011 and 2012) and the experimental cohort (2013), thereby avoiding potential sample selection problems. The findings showed student learning outcomes in the new regime improved significantly. Interestingly, the effects were found to be greatest in the lower percentile of the score distribution.     

Internationalization of multi-source feedback systems: a six-country exploratory analysis of 360-degree feedback

In the past few years, few human resource practices have received as much attention as multi-source feedback systems (MSFSs). In the US and Canada, it is estimated that over one-third of organizations are using some form of MSFS and recent surveys show that this practice is still gaining popularity. Concurrently, a substantial amount of literature has focused on the effectiveness of this performance management practice. However, while few would dispute the popularity of MSFS, relatively little has been published on the use of these systems outside North America and thus little is known about their form and effectiveness in international contexts. This paper outlines the results of an international survey of MSFS. Interview data from HR managers and consultants from Argentina, Australia, China, Slovakia, Spain and the UK demonstrate that MSFS are being implemented, in slightly different ways, in each of these six countries. The main challenges in the application of MSFS in these various countries are the communication efforts necessary before and after implementation, and the inherent difficulty in giving and receiving feedback. The results of this study also provide data as to the perceived future of MSFS in each of the countries surveyed.     

Polite feedback signals in same-gender conversation-An investigation into the theory of politeness impact on the male speakers and female speakers use feedback signals in the same-gender conversation

交流是每天日常生活中分享知识和经验所必不可少的一部分。对话作为交流手段的一种主要形式,是一种即时即地发生的社会活动。反馈语是交互子系统中的(即对话过程中的)一种特定用语,主要表现为使用特定或固定的语言学词汇来引出上下文或是帮助理解或是暗示说话人态度等等。男性和女性参与者在会话过程中使用不同的策略或是选择合适的反馈语表达他们的意见,想法,目的,态度等等进而展现他们的礼貌。     

基于反馈信号检测的汽车疑难故障诊断

通过对现代汽车反馈传感器信号检测的结果分析，总结目前机动车疑难故障诊断的新的方法和思路，对汽车维修中常见的无明显故障码的现象产生原因进行研究，提出了相应的解决办法和应对措施．对汽车反馈传感器波形检测的实车应用进行了有意义的探讨和论证．     

A New Tune from an Old Instrument

SUMMARY

The ability to provide high quality customer service and to deliver customer value is critical to attracting customers in the competitive tourism service environment. This research seeks to explore whether the instrument developed by Zeithaml et al. (1990), referred to as SERVQUAL, can be applied to a tourism service business to provide a quantifiable method of measuring service quality. An adaptation of SERVQUAL was applied to a business operating tours through a brewery in Tasmania, Australia. The instrument proved to be adequately internally reliable and provided apparently useful and easily interpretable diagnostic data to the management of the business. It was concluded that SERVQUAL has the potential to be a useful management tool provided care is taken to adapt the instrument to the individual needs of the user while remaining within the underlying theoretical framework. Adaptation and simplification of the complicated instrument provides small tourism businesses with a new way of gaining theory-based diagnostic data that can be self-administered by management on an ongoing basis and is not a burden to the customers.     

Assessing the e-Service Quality of Sellers in an Industrial e-Marketplace

Existing studies of electronic service quality (e-SQ) mainly deal with online shopping mall operators in business-to-consumer (B2C) markets, whereas research into the e-SQ of sellers in industrial electronic marketplaces (e-marketplaces), characterized by multiple sellers and multiple customers, is lacking. Therefore, this study intends to determine if existing theories developed and tested in the B2C online shopping mall context are directly applicable to measure e-SQ of industrial e-marketplace sellers. By qualitatively analyzing customer feedback obtained in an e-marketplace, this study offers an in-depth exploration of e-SQ dimensions, discovers a tentative causal model of the e-SQ specific to industrial e-marketplace sellers, and compares the tentative model grounded in the qualitative data with existing research tested with quantitative data. This study shows that existing e-SQ scales may not apply, without revision, to measures of the e-SQ of industrial e-marketplace sellers.     

MULTISIM软件在模拟电子技术课程教学中的应用

电子技术教学,尤其是模拟电子技术的教学,一直是老师们在研究的问题。一直以来,学生们都认为模拟电子技术这门课程是不好学习的。如今电脑已经非常普及,学校也能够为学生上课提供足够的电脑。那么就我们可以使用MULTISIM软件来教授和学习电子类的课程。本应用MULTISIM软件解决了模拟电子技术课程中很重要的带负反馈三极管两级放大电路的反馈分析以及交流参数的计算问题。