二维RAKE接收机中一种约束最小二乘信道矢量估计算法

针对移动通信中目标方位变化比信道衰落变化慢的特点，首先利用子空间分解法估计出目标信号的导向矢量，并用估计出的导向矢量构造一个约束条件，然后用业务信号在约束最小二乘准则下估计信道失量，本用带投影的迭代最小二乘(ILSP)算法求解约束最小二乘问题，导频用于ILSP算法的初始化，通过ILSP算法的迭代过程，可以逐步提高信道矢量估计和符号检测的精度．仿真结果表明：与传统二维RAKE接收机相比，本提出的算法使系统的性能得到了有效改善．     

日汉被动句互译及其表现形式

日本民族的性格特点决定了在语言表达方面多用被动形式表达自己的情感或叙述一件事，而中华民族正与之相反。因此，日译汉时就必须把一些被动式改为主动式，使之符合中国人的表述习惯；而汉译日时也应当考虑日语的特点，把一些主动式改为被动式。本文概括了日语被动句的主要表现形式，又具体论证了日汉互译时应当着重注意的几个方面。     

学生仅仅是“受教育者”吗?——兼谈师生关系观的转换

学生是具有超越性的“受教育者”,在师生互动的具体教育场景中 ,学生常常会在实际上变为“非受教育者”,并有可能在实际上充当“教育者”。师生之间应由静态的“师教生学”关系转变为动态的“共生互学”关系。“吾爱吾师 ,吾更爱真理”的观点与行为正逐步成为我国教育的一种“新现实”。     

语境与英汉翻译

The term "context" refers to all the different situations involved in language communication. Context analysis plays avery important role in the entire process of translation. Taking this as its central argument, the paper focuses on the discussionof five factors in English-Chinese translation.     

基于SHT10的无线温湿度采集系统设计

SHT10是瑞士Sensirion公司生产的一种温湿度传感器。本文介绍了由SHT10、AT89S52单片机和SRWF-1021无线收发模块构成的无线温湿度采集系统,可实现对环境温湿度的采集、显示和传输,具有精度高、使用方便等特点。     

多功能公交站牌的设计与制作

应用单片机STC89C52作为控制系统的核心芯片,通过编解码电路PT2262/PT2272和无线电发射、接收电路实现信息无线交换,通过旋转显示屏信息,实现绿色能源供电,低功耗,多功能人性化的设计,提高公交站牌的智能化,为实现城市公交网络化做了有益尝试。     

Effects of communities of reflecting peers on student‐teacher development – including in‐depth case studies

Despite continuing interest in teacher reflection and an extensive body of research on peer assessment, the interaction between these areas has not been sufficiently investigated. This study on reflection and peer feedback is part of an ongoing action research addressing the design and pedagogical model of a theoretically oriented teacher training course. The course comprised face‐to‐face lessons followed by written reflections of the student‐teachers concerning their learning experiences. These reflections were presented for peer feedback – thereby initiating a community of reflecting peers (‘co‐reflection’) – and were additionally subjected to instructor feedback under two conditions (full vs. diluted). Student‐teachers’ perception of their professional development that resulted from these co‐reflecting communities were quantitatively evaluated (using a self‐reported questionnaire) over a three‐year period. An enhanced positive effect over the three‐year period was found – regardless of the instructor feedback condition – as well as significant differences between parallel groups (higher for science vs. mathematics student‐teachers). These are described in the first part of the paper, followed by an in‐depth case study analysis in the second section. The case studies reported inclusive analysis of the students’ written reflections and feedback. It provides an insight into the processes of co‐reflection, identifies changes over time in the quality of reflections and feedback, as well as in the personal, professional and social development of the student‐teachers, attempting to identify the mechanisms leading to these changes. Examples are cited to illustrate the ways in which the students developed and what activated their motivation for development. The case studies reveal two developmental models, one of external orientation and the other internal. These are characterized by a willing receiver and willing donor, respectively. The importance of a ‘maturity interval’, when the student is ‘ripe’ for developmental change, was also demonstrated. Offering an appropriate trigger at this mature point may stimulate crucial development. Teacher development is further interpreted in terms of interpersonal variables. The current paper may encourage teacher educators and student‐teachers themselves to incorporate co‐reflecting in their course planning and community planning. Ways may be designed to train student‐teachers to offer and use feedback effectively. For feedback to be valuable, it should be reinforcing, challenging, thorough and sincere, radiate faith, and be of a friendly nature – it should be non‐insulting and non‐judgemental. They may be used for in‐text as well as summary remarks.     

基于FPGA的宽带信道化数字接收机设计

从减少FPGA资源使用的角度出发,设计一个宽带信道化数字接收机,并对系统中多相滤波及IFFT两大模块的实现进行分析、优化,使FPGA的信号处理能力达到最高效,以解决由于瞬时带宽不断拓宽而带来的设计和实现的困难。     

国内外组织内部知识共享影响因素研究综述

知识共享是知识管理理论中的重要组成部分。近年来,关于知识共享影响因素的研究已成为学术界热点。按照普遍观点,知识共享的影响因素主要分为知识共享主体(知识)、知识共享客体(知识源和接受者)与知识共享情境3个方面。目前,在对组织内部知识共享影响因素的研究上,国内外学者在理论研究与实证研究方面都取得了丰富成果,推动着知识共享理论向纵深发展。     

谈“三生教育”中教师身份的二重性

在＂三生教育＂实施过程中,教师的身份是二重的,他们既是授者也是受者,两重身份同存于一身且相互促进。