自由空间可见光通信教学实验平台建设

基于当前自由空间可见光通信应用研究热点,开发了一套结构开放的实验教学平台。该平台实现了模拟语音信号实时无失真传输、模拟视频信号实时传输及数字信号传输。平台的开放性使学生能够在可见光通信系统的调制方式、链路模型、通信性能、应用场景等方面进行研究和创新性开发,从而为综合型、研究型、探索型多层次教学提供有力支撑。     

资源共享的智能制造虚拟实验教学平台建设

采用专业虚拟仿真软件,通过计算机网络将智能制造设备3D虚拟模型与实体PLC设备建立实时数据连接,形成虚实结合的智能制造实验教学系统。实验室局域网经VPN网关与校园网连接,使学生在完成实验预约后可以通过校园网访问虚拟实验教学系统、下载实验资源、远程连接PLC,进行虚拟仿真实验。构建的资源共享智能制造虚拟实验教学平台可以提高实验室资源的利用率,有利于培养更多的专业人才。     

基于无线WiFi的实验数据实时检查分析系统的开发与实践

实验数据实时检查分析在实验教学中起着非常关键的作用。通过实时数据分析可以及时发现学生实验当中存在的问题,并且可以对学生的实验成绩进行客观的评定。开发了基于WiFi无线传输技术的实验数据实时检查分析系统,详细介绍了系统的搭建方法及数据发送界面、数据接收界面和数据分析界面的主要功能。该系统可以解决教师无法在实验课堂上实时检查分析学生实验数据的问题,能有效提高教师指导效率及课堂教学质量。     

运动人体科学实验教学平台的设计与构建

为了提高运动人体科学实验教学质量,本文提出应用J2EE技术实现基于Web的运动人体科学实验教学平台构建方案;考虑到实验教学平台的稳定性、扩展性、安全性和易用性,本平台采用基于Web的B/S(Brower/Server,浏览器/服务器)多层结构模型,采用模块化开发方式,主要由管理员模块、教师模块和学生模块等功能模块构成。平台的实验教学内容以阶梯式、渐进式编排成体系;平台有很强的实时性、互动性和开放性。该平台是将计算机技术、网络技术和多媒体技术等多种技术相结合,集实验教学与创新研究于一体的开放式平台。平台以虚拟实验与课堂操作相结合,教师辅导与多媒体辅导相结合,基础实验与创新实验相结合等多种方法,培养学生实验技能和应用创新的实践能力。     

超文本结构的智能实验教学系统研究

本文根据智能实验教学系统的特点和认知过程,提出了超文本结构的智能实验教学系统的方法和分层结构模型,同时,定义两种表示知识重要性的方法,从而构造出教师模型和学生模型,并应用于《数学电路实验》教学。     

重磁资料处理与解释虚拟仿真实验教学系统建设

基于勘查技术与工程（勘查地球物理方向）实验教学的需要,本文利用虚拟现实、三维建模、人机交互等信息化手段,设计和构建了重磁资料处理与解释虚拟仿真实验教学系统。在该系统平台上,学生可通过互动、任务式学习及自主探究等学习方式,进行重磁资料处理与解释的虚拟仿真实验,实现建模、数值计算、处理与成像、综合地质解释等实验教学目标。该系统由重磁资料整理与预处理实验系统、重磁场正演实时分析实验系统、重磁资料处理与综合解释实验系统3个核心模块组成,与野外实习和实验室物理模拟互相补充,提供了学生实践技能训练和自主探究的有效途径。     

5G云与VR结合的肾小球疾病实验教学系统建设

肾小球疾病的病理诊断多数为二维切片,无法直观学习。针对一些虚拟仿真实验教学系统存在依赖高端PC、同一时间学习人数受限、程序运行卡顿、不支持实时交互操作等瓶颈问题,基于5G云与VR技术设计开发了肾小球疾病实验教学系统。该系统以虚拟的肾脏、肾小球、肾小球病理模型为载体,将相关的组织结构、病理改变等教学重点和难点融入虚拟仿真实验教学中,并将仿真系统部署到5G云上,使用者通过该系统能够反复、多视角观看;建立三维立体的组织学形态,更加直观地认识和理解肾小球结构以及病理改变的状态,获得更多练习机会和接近实际的临床体验;解决了目前虚拟仿真实验教学系统在对同时受训人数和时空上的限制,实现了多终端供多用户无时空限制流畅使用,终端无需配置高端PC,降低运维成本。该系统将5G云与VR技术应用在医疗实践教学中作了一次成功的尝试。     

“新工科”背景下实时通信实验教学体系研究

研究和分析了"新工科"背景下实时通信实验教学在本科和研究生相关课程中的教学理念和教学目标,制定了涵盖基本实验、扩展实验、验证分析和工程应用4个不同层次的实验教学体系,设计并开发了实时通信实验教学的仿真模型,实现了实时通信实验教学体系的一体化设计。对近三年实际教学数据的统计分析表明:分层实验设计具有促进学生学习和检查学习效果的相对客观性,可成为衡量本科生与研究生在实验创新性差异上的有效度量标准,有效提升了学生在"新工科"背景下的实践能力和创新能力。     

现代民航CBT系统实验教学应用现状及对策

以滨州学院飞行学院为例,分析了现代民航CBT系统应用于航空理论实验教学存在教学内容不合理、课堂纪律难掌控、实验室管理人员匮乏等一系列问题。通过构建新的CBT实验教学内容体系、合理配备实验室工作人员,在实验教学中渗入学生职业素养的培养和安装网络实时监控系统等并相应改革措施,从而更好地提高CBT系统的利用率,保证实验教学的效果和质量。同时,为下一步的实验教学提供一些有益的借鉴。     

基于Xen的开放式半虚拟化集群Linux实验教学环境建设探索

针对传统Linux实验教学环境存在的系统难以维护、无法为学生提供ROOT权限等问题,通过使用基于Xen的半虚拟化技术,构建了开放式的集群Linux实验教学环境。在这个实验教学环境中,教师可通过基于Web的操作界面进行管理,学生可通过基于VNC的图形界面进行实验及与教师进行实时交互,管理员还可通过Xen的虚拟机动态迁移功能实现集群系统的负载均衡。大大降低了学生操作的难度,增进了实验效率,提高了硬件设备的利用率。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.