上海通利教学仪器厂

上海通利教学仪器厂,创建于1988年,是一家专业从事公共广播设备研究、设计、制造、服务的智能型实体企业。企业通过了ISO9001—2000国际质量体系认证、CE认证,拥有先进的专业检测设备和几十年开发经验的技术组。主要产品为电子科教、校园广播、电子显示器、麦克风、会议话筒、会议表决系统等多方面。     

基于LCD和二维DLT的相机标定方法

近年来,三维目标建模一直是计算机视觉及摄影测量领域的研究热点,数码相机技术的发展使得普通数码相机在摄影测量领域的应用越来越广泛,相机（或摄像机）标定成为一项关键技术。本文提出了一种基于液晶显示器（LCD）的相机标定新方法,详细论述了其标定过程和标定理论。并通过实验证明了该方法的可行性。     

Design and elementary realization of the Vision Earth System

The Vision Earth System is a interactive system by employing B/S model.The system has the function of query display and mutually displays relevant geologic information,integrating image information of one outcrop and realizing 3D geologic visualization.In this system,the basis is effective store,transmitting,display and quick query of enormous images and their properties data.From Java technology,this essay researches the elementary realization of Vision Earth System by adopting store formality of enormous images database,quick display image of website and quick image storage method.     

天宝公司发布用于施工行业的全新Spectra Precision RD20无线远程激光显示器

[本刊讯]2013年8月2日,天宝公司(Trimble)发布了Spectra PrecisionRD20无线车载远程显示器,进一步扩大其用于建筑施工行业的激光机械显示产品组合。RD20和全新无线远程激光接收机配合使用,提供坡度信息,帮助操作员提高生产力和安全性。该远程显示器可快速轻松安装,无需使用线缆即可在驾驶室内获取最佳视图。大号的明亮LED灯通过发出红、蓝或绿3     

一种用于相机检校的黑白棋盘格角点提取算法

黑白棋盘格作为一种人造平面控制条件,是一种重要的相机标定的参考条件。本文基于其角点的对称性、尺度不变性和领域特性,提出了一种有效的角点提取算法;同时针对格网边缘的特性,提出了双边缘的匹配算法,以提取高精度的角点;使用不同型号的相机、不同棋盘格制设备进行试验表明,本文提出的算法是一种具有很强鲁棒性的黑白棋盘格角点提取算法,可以高精度地定位角点。     

显示器常见故障及维修实例

显示器是微机的重要输出设备之一，是人机对话的重要工具。显示器种类繁多，一般常用的是阴极射线管显示器。其工作原理与电视机相似。显示器具有同步范围宽、显示分辨率高的特点。当显示：器出现故障时，要想快速准确地排除故障，不但要熟悉显示器的内部电路和工作原理。还要积累一定的实际维修经验。     

HDP—4型四道γ能谱仪

便携式HDP—4 四道γ能谱仪，是核工业北京地质研究院物化探中心近几年开发研制的一种功能全、性能较高的四道γ能谱测量仪器.仪器由探头和操作台两部分组成.操作台采用双单片机结构，分别负责数据处理和数字自动稳谱，其中的自动稳谱技术比以往的能谱仪有了很大的改进；本仪器设置了多种测量方式，用户可根据测量目的进行选择；图形液晶显示器的使用克服了数据循环显示的弊端，可以同时显示铀、钍、钾、总道四个参数；设有微型打印机接口和RS232串口，方便了数据输出.     

Integration of Multi-source Measurements to Monitor Dust over North China：A Case Study

The aerosol optical depth （AOD） data from the Moderate Resolution Imaging Spectroradiometer （MODIS） aboard Satellite Aqua, along with the altitude-resolved aerosol subtypes product from the Cloud-Aerosol LIdar with Orthogonal Polarization （CALIOP）, as well as surface PM 10 measurements, were utilized to investigate the dust activities common in springtime of northern China. Specifically, a dust storm episode that occurred over the North China Plain （NCP） during 17-21 March 2010 was identified. The PM 10 concentration at Beijing （39.8 °N, 116.47 °E） reached the peak value of 283 μgm -3 on 20 March 2010 from the background value of 15 μg m-3 measured on 17 March 2010, then dropped to 176 μgm-3 on 21 March 2010. Analysis of the CALIOP aerosol subtypes product showed that numerous large dust plumes floated over northern China, downwind of main desert source regions, and were lifted to altitudes as high as 3.5 km during this time period. The MODIS AOD data provided spatial distributions of dust load, broadly consistent with ground-level PM 10 , especially in cloud free areas. However, inconsistency between the MODIS AOD and surface PM 10 measurements under cloudy conditions did exist, further highlighting the unique capability of the CALIOP lidar. CALIOP can penetrate the cloud layer to give unambiguous and altitude-resolved dust measurements, albeit a relatively long revisit period （16 days） and narrower swath （90 m）. A back trajectory simulation using the Hybrid Single-Particle Lagrangian Integrated Trajectory （HYSPLIT） model was performed, and it was found that the sand-dust storm originated from the Gobi Desert on 18 March 2010 travelled approxi-mately 1200-1500 km day-1 eastward and passed over the NCP on 19 March 2010, in good agreement with previous findings. In addition, the multi-sensor measurements integrated with the HYSPLIT model output formed a three-dimensional view of the transport pathway for this dust episode, indicating that this episode was largely associated with the desert source regions to the northwest of the NCP. The results imply the importance of integration of multi-sensor measurements for clarifying the overall structure of dust events over northern China.     

EN测风数据处理仪风向故障三例

例1：龙门县气象局一台新型的EN1-G型EN测风数据处理仪,使用3个来月,一次雷雨过后,显示器显示出的风向是“77”,也就是说风向部分发生故障。按以往的做法,先判断故障出在室外部分还是室内部分,与传感器连接的二十线插头拔开,用短路导线一头插进插座B2口,     

XENIX驱动程序设计及高分辨大屏幕显示开发

本文结合一个简单的显示驱动程序例子讨论了XENIX/386系统下驱动程序设计的重要概念和关键技术，并介绍了开发大屏幕高分辨率彩色图形（图象）显示驱动软件的一些思路和技巧；而这正是目前XENIX系统显示软件所缺少的，并且为加强XENIX系统I/O能力使之支持新的外部设备提供了有效途径。