基于LabVIEW的高频焊管红外测温系统设计

高频焊管生产环境复杂,测温环境恶劣,针对此特点,提出使用比色测温法进行高频焊管的温度测量,并介绍高频焊管测温系统的构建过程.红外测温仪具有较强的抗干扰能力和稳定性,实验选用红外测温仪作为传感器构建温度采集监测系统硬件平台;选用LabVIEW软件构建温度采集监测系统软件平台,其具有采集效率和测试精度高,模块小,编程简单等优点.实验证明,基于LabVIEW平台设计的高频焊管红外测温系统能准确测量到高频焊管焊接温度,并且在LabVIEW模块上实现信号的实时显示、存储和分析.     

Three-dimensional FEM analysis of stress distribution in dynamic maxillary canine movement

An alteration in stress/strain distribution within periodontal ligament (PDL) occurs when the tooth is mechanical stimulated in orthodontic treatment. The majority of previous finite element studies were confined to a static evaluation on initial loading status, and a dynamic long-term analysis was rarely performed in orthodontics. The present study sought to analyze the stress distribution patterns within tooth root, PDL, and alveolar bone during dynamic canine tipping and bodily movement with three-dimensional finite element method in four consecutive therapeutic weeks. We observed that the highest stress was on root surface, secondly alveolar bone, and finally, PDL for either tipping or bodily movement. Throughout the PDL and root surface, the highest stress was always around the cervical area in both patterns of movement through four phases. Moreover, a lower and more uniform stress distribution was produced during bodily movement compared with tipping movement. These results indicated that canine translation might be healthier for periodontal tissue than tipping movement; the cervical region bore a greater load and might also be a susceptible area for tissue damage (except for the apex) regardless of movement pattern.     

交互式电子白板在课堂教学中的应用探究

近年来，交互式电子白板作为一种新兴教学工具，在我国基础教育及高等教育中的应用越来越普遍。本文首先对交互式电子白板的定义及其在教学上的优势进行阐述，并进一步对我国交互式电子白板的研究应用现状进行梳理，以期发现和总结我国交互式电子白板研究特点，并对今后交互式电子白板的应用及研究提供一些思考和启示。     

Coastal seafloor observatory at Xiaoqushan in the East China Sea

The seafloor observation system is becoming an important infrastructure for marine research because it is transforming oceanic research from temporal investigation to long term observation.The East China Sea coastal seafloor observatory,located between 30°31′44″N,122°15′12″E and 30°31′34″N,122°14′40″E,is constructed near the Xiaoqushan Island outside the Hangzhou Bay on the inner continental shelf of the East China Sea.The observatory is connected by a submarine optical fiber composite power cable that is more than one kilometer long and consists of a special junction box that transmits power and communication signals to different instruments.The special junction box has a variety of waterproof plugs and connects to three different instruments installed in a trawl preventer.The submarine optical fiber composite power cable is landed on the platform by The East China Sea Branch,State Oceanic Administration and the power is continuously supplied by the solar panels and solar battery on the top of the platform.The real time data are directly sent through the cable to the platform and are transmitted by CDMA wireless to the receiver at the State Key Laboratory of Marine Geology of Tongji University.Measurements at the observatory have been taken since April 20,2009 after installation and the results have been interpreted.The characteristics of the near bottom boundary are constrained by a sediment suspension model using portion of the observed data.In particular,discussion is provided on the sea surface height anomaly at Xiaoqushan Island influenced by the tsunami driven by the 2010 Earthquake in Chile.The successful establishment of the coastal seafloor observatory is the first step toward future development of seafloor observation systems in China.It not only accumulates experiences in technology and engineering,but also paves the way for performing important oceanic research using the long term continuous observation platform.     

对普通高校散打运动可持续发展的思考与建议

通过运用文献资料、逻辑分析等方法,分析探讨了现阶段武术散打运动在高校发展面临的问题,并对武术散打运动在高校可持续发展提出了一些可行性建议。     

墨子义利观思想特征探析

墨子的义利观对"义"和"利"做了本质规定,提出了义利关系的一般原则,并给予了其实施的经济、政治、伦理方面的保证.其义利伦理思想有一定的局限性,但在今天仍然有重要的现实意义.     

高职旅游专业设置与课程体系设计的研究

高职旅游专业设置与课程体系的构建是培养21世纪旅游业所需求应用技术型人才开基础，文章对高职旅游的专业培养目标调整，专业设置调整，课程体系调整，专业师资队伍构建提出若干建设性意见。     

Geo-Agents: Design and implement

Geo-Agents, a multi-agent system that processes distributed geospatial information and geospatial service was presented. Firstly, the requirement for distributed geographical information process was discussed, and the architecture of Geo-Agents was introduced. Then in-depth discussions were raised on agent system implementation, such as the basic agent, agent advertising, message passing and collaborating. An example was also given to explain the problem solving process.     

The Application of Cobb-Douglas Function in Forecasting the Duration of Internet Public Opinions Caused by the Failure of Public Policies

Gushes of Internet public opinions may trigger unexpected incidents that significantly affect social security and stability, especially for ones caused by the failure of public policies. Therefore, forecasting this kind of Internet public opinions is of great significance. The duration could be cited as one of the most direct indicators that can reflect the severity of a specific Internet public opinion case. Based on this background, this paper aims to find the factors that may affect the duration of Internet public opinions, and accordingly proposes a model that can accurately predict the duration before the release of public policies. Specifically, an index system including 8 factors by considering four dimensions, namely, object, environment, reality (offline), and the network (online), is established. In addition, based on the dataset containing 23 typical Internet public opinion cases caused by the failure of public policies, 9 prediction models are gained by applying the multivariate linear regression model, multivariate nonlinear regression model, and the Cobb-Douglas function.     

仲胺修饰聚硅氧烷调控的一锅法Cu（I）催化多组分点击反应

在仲胺修饰聚硅氧烷的调控下，Cu（I）可在温和的条件下催化炔、叠氮化钠以及有机溴化合物的点击反应，收率较高，反应底物有比较广的适用性，不同的底物可以中等到较高的收率得到对应产物。