Technical diagnosis system for EAST tokamak

Technical diagnosis system (TDS) is one of the important subsystems of EAST (experimental advanced superconducting tokamak) device, main function of which is to monitor status parameters in EAST device. Those status parameters include temperature of different positions of main components, resistance of each superconducting (SC) coils, joint resistance of SC coils and high-temperature superconducting (HTS) current leads, strain of cold-quality components endured force, and displacement and current of toroidal field (TF) coils in EAST device, which are analog input signals. In addition there are still some analog and digital output signals. The TDS monitors all of those signals in the period of EAST experiments. TDS data monitoring is described in detail for it plays important role during EAST campaign. And how to protect the SC magnet system during each plasma discharging is presented with data of temperature of coolant inlet and outlet of SC coils and feeders and cases of the TF coils and temperature in the upper and middle and bottom of the TF coil case.During construction of the TDS primary difficulties come from installation of Lakeshore Cernox temperature sensors, strain measurement of central solenoid coils support legs and installation of co-wound voltage sensors for quench detection. While during operation since the first commissioning big challenges are from temperature measurement changes in current leads and quench detection of PF coils. Those difficulties in both stages are introduced which are key to make the TDS reliable. Meanwhile analysis of experimental data like temperature as a back up to testify quench occurrence and stress on vacuum vessel thermal shield and vacuum vessel have also been discussed.     

TDS220数字示波器自动测试系统

本文主要介绍数字示波器TDS220自动测试系统,该系统主要由9500B示波器校准仪、GPIB接口卡、计算机、电缆等组成,主要完成示波器的直流电压、带宽、触发灵敏度、时间准确度的测试;并且阐述了基于LabVIEW的自动测试系统硬件和软件的应用,通过实例讲述了如何实现仪器程控、控制信号的产生和测量结果的处理.     

基于智能操作的通信管道可视化模型研究

通信管道的智能化制图与维护一直是电信资源管理系统的难题。基于面向对象GIS建模技术提出了一种有效的多层复合通信管道地理模型，并又在MapInfo平台通过MapBasic编程已完全实现。该模型不仅满足视觉要求，而又所设计的用户操作简便、易用，为实现对市话管线资源的高效、可视化管理提供了一条有效的途径。     

时间统一系统秒同步故障远程预警系统设计

针对在任务中使用示波器监测时统同步精度时,岗位人员需长时间密切注视示波器状态,极易疲劳,且不能及时发现设备故障,延误处理时机,影响任务顺利完成。提出一种时统秒同步故障远程预警系统的设计思路,利用示波器通信扩展模块TDS2 CM采集示波器监测信号,经过单片机和网络模块处理,传输到IP网络实现远程监控。当本机秒和外秒的同步精度超出某一设定的数值时触发声音告警,及时提醒岗位人员进行手动同步操作,防止同步精度超出规定的技术指标范围,达到故障预警的目的。     

SQL Server数据传输协议分析

对微软SQL Server数据库的表格数据流协议（TDS）在网络中的传输进行了研究,总结了TDS数据包的报文结构。在此基础上,进一步分析了TCP／IP连接和命名管道连接方式下,数据在网络中的传输格式,以及客户端和服务器请求／响应操作的详细步骤。     

正入射反射式太赫兹光谱测量的不确定度分析

太赫兹时域光谱技术能够快速、宽频带测量物质在太赫兹频段的光学或介电常数, 是物质识别的重要技术.光学常数的测量准确度完全受到复杂的测量过程和数据处理所影响.针对正入射反射式THz光谱测量, 分析了在测量材料介电特性过程中的误差来源, 它们包括太赫兹幅值误差、位置误差以及样品倾斜误差.建立了单独表征每个误差来源对于光学常数影响的不确定度分量的公式.利用MATLAB仿真了每个误差来源对于光学参数不确定度的影响.     

基于TDS协议的安全性测试技术

在分析SQL Server数据库通信框架和TDS协议结构的基础上,编写了Fuzzer工具——TDS_fuzzer。该测试工具针对TDS协议设计特殊数据包,实现了数据转变、字符串、字段组合这3种测试方法。通过测试MS SQL Server的2个重要漏洞,验证了其有效性。     

Experimental investigation of preparing and using the H2O based nanofluids in the heating process of HVAC system model

In this experimental work, three types of water-based nanofluids are prepared by ultrasonic method. SiO₂, TiO₂ and CNT nanoparticles are used for preparing the nanofluids. Applications of these nanofluids are examined in the heating process in HVAC systems. During the experiments, total dissolved solids (TDS) of nanofluid are measured to see which nanofluid is more appropriate in heating process and makes the lower deposits and sediments. Also, heated area and nanofluid temperatures are recorded to show which nanofluid in suitable for heating from energy consumption view point. Results show that SiO₂ can be more suitable from the energy consumption view point because by lower energy consumptions, it reaches to desirable temperature in the heated area.