多彩太阳电池的制备及性能研究

研究了不同颜色太阳电池的制备工艺和电学性能。实验表明,随着镀膜压强的增加,减反射层的折射率缓慢增加,当压强超过1800 mTorr时,折射率的增幅变大;随着镀膜时间的增加,太阳电池的开路电压Uoc先增大后减小,当淀积时间为550 s时,Uoc达到最大值;短路电流Isc随淀积时间的变化趋势与Uoc相同,当淀积时间为650 s时,Isc达到最大。因此,对于具有装饰功能的太阳能电池组件采用并联的方式进行设计可达到最佳组件效率。     

一种基于评价函数的三维矩形布局遗传算法

针对三维矩形布局问题,提出一种基于评价函数的布局遗传算法.该算法根据布局已知条件建立定序和定位评价函数,然后通过对评价函数值的比较确定布局的定序和定位规则;最后采用遗传算法优化定序和定位规则的参数.算例测试结果表明,该算法具有良好的计算效果.     

一种3G手机网络游戏服务器架构的分层设计

3G手机网络游戏互动娱乐应用平台基于3G无线网络的高带宽及封装的底层协议、高性能服务器端、跨平台客户端等技术,以实现业内最有挑战性的MMORPG游戏类型为目标.该系统建成能有效提高数据通讯传输速率、保障数据安全、确保达成即时互动和保障用户体验.     

SBR工艺在处理模拟制革废水中运行参数的优化

在处理制革废水中常用SBR工艺,试验探讨了不同HRT、进水pH、COD负荷、NH3-N浓度、活性污泥浓度的运行参数,研究SBR工艺处理制革废水的最优运行参数．结果表明：SBR反应器在进水COD为1500～2000mg／L、NH3-N为150～250mg／L、pH为7．5、运行污泥浓度在3．0g／L左右、曝气时间为18h时COD去除率能达到95％左右,NH3-N去除率达到97％左右,其出水能够达到一级出水标准．     

嫦娥三号软着陆轨道设计与控制策略

嫦娥三号要准确在月球预定区域内实现软着陆,关键是着陆轨道与控制策略的设计。首先,用物理图解法建立三维坐标系和开普勒定律,求出嫦娥三号近远月点的坐标和速度大小,结果表明与基准数据误差较小。其次,以燃耗最优为指标,综合考虑速度约束和落点位置以及着陆的安全性,应用归一化的二体模型,得到燃料最优的软着陆轨道。对嫦娥三号探测器推动力进行了敏感性分析。     

ADHD in the context of Finnish basic education

Students with Attention Deficit/Hyperactivity Disorder (ADHD) are a growing group served under special education services in many western societies. This article describes the history and current state of the services, as well as the assessment procedure. Our conclusion is that the status of students with ADHD in Finnish basic education (Grades 1 to 9) is still unclear. Based on the comparison of the prevalence and the population served in special education we can assume that this group is probably underserved in the Finnish school system. We also present findings from two recent studies among families with ADHD children in Finland. Family viewpoint can contribute to our knowledge and understanding about the diversity of the symptoms’ manifestation as well as the extent and completeness of the possible outcomes of the disorder. In the context of schooling, studying these families’ viewpoints can be of additional use in evaluating the present state of school practices in relation to institutional enactments established in educational acts. Future challenges about meeting the variety of pupils’ needs according to inclusive pedagogy are discussed.     

Fe_3O_4/NSTO不同取向异质结的输运特性

利用脉冲激光沉积法,在3种不同取向的NSTO基片上,生长得到3种不同取向的Fe3O4外延薄膜。制备了Fe3O4（100）/NSTO（100）、Fe3O4（110）/NSTO（110）、Fe3O4（111）/NSTO（111）3种不同异质结。3种异质结的I-V曲线都具有很好的整流特性。利用肖特基结（Schottky junction）二极管I-V关系的热激活模型对实验数据进行处理,得到了这3种异质结的势垒高度ΦB随温度的变化关系。对这3种Fe3O4/NSTO异质结的磁阻进行了测量,分析指出Fe3O4的磁各向异性和不同取向异质结的势垒高度差,是造成3种异质结磁阻差异的主要原因。发现3种异质结的磁阻都与Fe3O4的Verwey转变温度（Tv）相关,在120 K处负磁阻最大。     

基于Solidworks三维建模的制图测绘教学改革探索

针对高职院校机械类专业开设的制图测绘实训课程,分析了目前制图测绘教学中出现的学生忽视测量准确性、零部件表达不准确、疲于完成图纸绘制等问题,提出了将三维建模引入制图测绘教学,利用三维模型与二维图纸的转换提升零部件表达的准确性、利用三维装配来约束零件尺寸测量的准确性,同时由三维模型直接生成二维工程图,大大提高了绘图的速度和准确度,也符合现代设计理念。     

A latecomer's strategy to promote a technology standard: The case of Datang and TD-SCDMA

This paper studied the key strategies used by Datang, a local Chinese firm, to promote TD-SCDMA in order to explore an under-researched topic: how could a latecomer promote a technology standard? The findings suggest that Datang faced formidable challenges because of latecomer disadvantage and transitional institutions. The development of innovation capabilities and new technologies is needed but far from sufficient. It is necessary to develop special capabilities to get support from the government and public stakeholders such as scholars. The experience of Datang offers new insights into the development and adoption of technology standards sponsored by latecomers in developing countries.     

复杂零件装配流程优化的三维图像虚拟重现仿真

当前复杂的零件装配过程中,装配流程的步骤多达上千次,合理的装配顺序是高效工作的保证。提出一种基于考虑需求虚拟负责零件装配流程重新仿真方法。分析了复杂零件直接的装配关系。通过装配体层、子装配体层、零件层、零件特征层、零件几何层建立零件直接的装配关系模型。通过三维图像虚拟技术完成模型的重现。测试结果表明,采用三维图像虚拟复杂零件装配流程系统,可以对较为复杂的零件拆卸过程进行重现,对交叉装配过程的仿真过程也可以较好的实现。