R~n上局部可积函数一个性质的推广     

韩振岭  王汝发 《赣南师范学院学报》1997,(6)

文［１］中王士林教授给出了一个有用的引理，本文将该引理进行推广，利用该引理为研究Ｌｉｔｌｅｗｏｏｄ—ｐａｌｅｙｇλ—函数和Ｌｕｓｉｎ面积积分函数提供了有力工具  相似文献   

试探限时翻译中的格式塔型错误     

赵一农 《海外英语》2011,(3):3-5

英语专业八级考试(TEM8)的英译中属于限时翻译,是在无词典可查的情况下进行的。格式塔心理学认为人们在感知事物时,将它们作为一个统一的整体来感知,整体并不等于部分相加的总和。由于时间紧迫,有些考生会感到紧张,因而对个别英语单词以格式塔方式来认知,结果会作一些表面看是低级荒唐的错译。  相似文献   

课程内容研究的新视野——TIMSS课程分析工具“主题追踪图”的演进与启示     

张新宇  袁智强  占小红 《比较教育研究》2011,(1):76-80

美国密歇根州立大学施密特教授等人研究开发并完善的TIMSS"主题追踪图"作为重要的整体性课程分析工具,其使用的建模方法有效弥补了传统研究方法的不足。本文通过检索"主题追踪图"的演变轨迹,认为基于该工具的国际课程比较能全面反映各国课程在主题选择与组织层面的异同,而构建的课程连贯性理想模型更是提供了一种全新的课程内容研究思路与范式。  相似文献   

基于构造-剪枝混合优化RBF网络的煤灰熔点预测方法     

丁维明  吴小丽  魏海坤 《东南大学学报》2011,(2):159-163

为提高煤灰熔点的预测精度,提出了一种基于构造-剪枝混合优化RBF网络的煤灰熔点预测方法.该方法融合了神经网络构造算法和剪枝算法的优点,分为“粗调”和“精调”2个阶段.粗调阶段动态增加隐节点数目直至满足相应的停止准则;精调阶段对粗调得到的RBF网络的结构和参数作进一步调整.基于煤灰的化学组成成分建立相应的构造-剪枝混合优...  相似文献   

Socioeconomic Status– and Gender‐Based Differences in Students’ Perceptions of E‐Learning Systems     

Leslie Jordan Albert  Camille S. Johnson 《Decision Sciences Journal of Innovative Education》2011,9(3):421-436

Many universities are pursuing increases in on‐line course offerings as a means of offsetting the rising costs of providing high‐quality educational opportunities and of better serving their student populations. However, enrollments in online courses are not always sufficient to cover their costs. One possible way of improving enrollments is through marketing campaigns targeted to specific demographic groups. In this study, we take a first look into how students’ perceptions of e‐learning systems, prior to their enrollment in an online course, vary across socioeconomic status and gender. Findings suggest that prior to taking an online course, working‐class students perceive e‐learning systems more positively than their middle‐class peers but that little difference exists between genders. Armed with this knowledge, universities may improve online course enrollments by marketing online courses specifically to working‐class students or through campaigns aimed at improving middle‐class students’ perceptions of e‐learning systems.  相似文献   

1860年汕头开埠始末考略     

陈训先 《韩山师范学院学报》2011,32(2):6-9

该文根据国家权威档案文献,论述1860年汕头开埠始末的曲折过程;指出,汕头开埠是第二次鸦片战争清政府屈辱妥协外交路线的产物,是中华民族的屈辱史,是粤东门户被迫＂开放＂史,也是潮汕历史大走向的重要转折点。今人应以胡乔木《国史事典》的题词＂在沉重的历史中,汲取奋进的力量＂为警示,＂知耻近于勇＂,爆发奋进之力,建设美好家园。  相似文献   

Effects of La^3＋on microwave dielectric properties of（Pb0.5Ca0.5）（Fe0.5Ta0.5）O3ceramics     

江永长  顾莹  杨秋红  金应秀 《上海大学学报(英文版)》2011,15(6):535-537

This work investigated the microwave dielectric properties of A-site substitution by rare earth La3+in(Pb0.5Ca0.5)(Fe0.5Ta0.5)O3(PCFT) system.A single perovskite phase was obtained only when the doping content was 2%.Suitable La3+ doping improved microwave dielectric performances.Excessive La3+doping caused the formation of secondary phase,which resulted in the decreasing of permittivity εrand quality factor Qfvalues.Especially,when the doping content is 2%-5%,permittivity εrwas above 75 and Qfvalues were 6...  相似文献   

Implementation of advanced peripheral bus interface for MV1O MCU     

HU Yue-li  HUANG Jun-liang  ZHOU Jun 《上海大学学报(英文版)》2011,15(4)

MV10 is an MCU which consists of PWM,ADC,CAN and some other function blocks.It is designed for car body's control.Advanced peripheral bus (APB) is a low speed AMBA bus connecting low-power peripherals.This paper presents an implementation of APB interface for MV10 MCU.After that,MV10 can be integrated into any AMBA system on chips (SoCs) easily.We have built a multi-core system with ABMA to verify this design.In this system ARM9 is a main processor mounted on AHB and MV10 acts as a low-power and low-speed slaver on APB.Before building this system,some operations are encapsulated into a task with dedicated ID.MV10 works as a co-processor with ARM by acquiring task ID from ARM.The result of simulation indicates that MCU can work well as expected.Based on our design,MV10 can be mounted on any AMBA system from now on.  相似文献   

我们为什么要追寻容闳和留美幼童的足迹     

梁赞勋 《徐州师范大学学报(哲学社会科学版)》2011,37(5):1-5

从容闳与留美幼童这个重大事件所处时代及事件性质所具有的标志性来看,从解剖一个时代社会横断面的历史研究方法和留美幼童在中国留学史中所表现出的先锋、示范作用来看,容闳和留美幼童的足迹是值得我们努力追寻的。有关容闳与留美幼童历史的研究,十余年来取得了丰硕的成果,发现了不少值得探索的新课题。对容闳与留美幼童的研究作出重要贡献的单位和个人,都值得我们尊敬和学习。  相似文献   

韦氏儿童智力量表与特殊儿童测查:挑战、改革与发展     

曹洪健  周楠 《中国特殊教育》2011,(6)

韦氏儿童智力量表是迄今为止最权威和应用最广泛的儿童智力量表之一.自面世 以来,它在各特殊儿童的筛查、诊断、安置、干预与治疗过程中一直发挥着重要作用.目 前,该量表已发展到第四版,并仍在不断地修订中.总结该量表在特殊教育领域内的应用 现状并省思其在实践过程中遭遇的困境与挑战,进而把握其进一步改革的研究方向及发展 趋势,有助于促进国内特殊教育的发展.文章回顾了该量表在国内外的发展简史,就各类 特殊儿童智力测查对该量表提出的挑战进行了总结,对其实践中遇到的问题进行了分析, 指出了其在发展过程中已有的改进措施和尚未解决的问题及继续研究的方向,并在此基础 上总结了该智力测验发展的七大趋势.  相似文献