Design of Timing Synchronization Software on EAST-NBI

To ensure the uniqueness and recognition of data and make it easy to analyze and process the data of all subsystems of the neutral beam injector （NBI）, it is required that all subsystems have a unified system time. In this paper, the timing synchronization software is presented which is related to many kinds of technologies, such as shared memory, multithreading, TCP protocol and so on. Shared memory helps the server save the information of clients and system time, multithreading can deal with different clients with different threads, the server works under Linux operating system, the client works under Linux operating system and Windows operating system. With the help of this design, synchronization of all subsystems can be achieved in less than one second, and this accuracy is enough for the NBI system and the reliability of data is thus ensured.     

Development of a Data Acquisition Control System for the First NBI on EAST

Neutral beam injection （NBI） heating is one of the most efficient auxiliary plasma heating methods for fusion devices. The data acquisition control system （DACS） with PXI （pe- ripheral component interconnect extensions for instrumentation） data acquisition card for the first NBI system in the experimental advanced superconducting tokamak （EAST） is presented in this paper. As an important sub-system, DACS is designed to obtain physical measurement signals in the EAST NBI system and to deal and store these data with the Lempel-Ziv-Oberhumer （LZO） lossless data compression algorithm, as well as offer convenient data call-back and access inter- faces to the user for examining and analyzing the data. Experimental results show that accurate data will ensure that researchers correctly analyze it and then properly adjust the experimental parameters or operation, so DACS should take a large step in improving experimental efficiency. Tile hardware and software sections are briefly presented in this paper, and now this system has been tested to be able to work reliably and steadily.     

EPON_EoC网络拓扑分层显示的设计与实现

EPON+EcC作为三网融合中双向改造的主流方案,为其构建统一网管系统是必要的,而以图形方式显示网络拓扑结构是网管系统的基本要求之一.在已实现的EPON和EoC设备统一管理方案及拓扑发现的基础上,结合Twaver SVG进行了网络拓扑多层显示的设计与实现,并完善了拓扑编辑、拓扑导出等功能.同时,在此基础上也实现拓扑显示...     

Development of Data Processing Software for NBI Spectroscopic Analysis System

A set of data processing software is presented in this paper for processing NBI spectroscopic data.For better and more scientific managment and querying these data,they are managed uniformly by the NBI data server.The data processing software offers the functions of uploading beam spectral original and analytic data to the data server manually and automatically,querying and downloading all the NBI data,as well as dealing with local LZO data.The set software is composed of a server program and a client program.The server software is programmed in C/C++under a CentOS development environment.The client software is developed under a VC6.0 platform,which offers convenient operational human interfaces.The network communications between the server and the client are based on TCP.With the help of this set software,the NBI spectroscopic analysis system realizes the unattended automatic operation,and the clear interface also makes it much more convenient to offer beam intensity distribution data and beam power data to operators for operation decision-making.     

The Timing System of the Neutral Beam Injector on EAST

In order to synchronize the elements of the EAST Neutral Beam Injector(NBI)spatially located in several places,a distributed Timing System(TS) is developed in this paper.The timing system provides a clock reference for synchronization and an interlock protection of the EAST NBI system.It sends timing signals to field devices,controls the pulse widths of the timing sequences,and provides a sampling clock for the Data Acquisition System(DAS).The timing system also generates analog waveforms to control power supplies and gas supplies according to the operator’s configuration.The timing system is developed on a PXI(PCI extensions for Instrumentation) platform consisting of a Lab VIEW workstation and a timing control terminal.The timing control terminal consists of a timing node and several control interface crates.Two timing nodes are configured in one beam line.Each node is responsible for the timing sequence,analog generation and feedback control for one ion source.The architecture and implementation of the timing system are presented in this paper.     

The Implementation of Computer Data Processing Software for EAST NBI

One of the most important project missions of neutral beam injectors is the implementation of 100 s neutral beam injection （NBI） with high power energy t.o the plasma of the EAST superconducting tokamak. Correspondingly, it＇s necessary to construct a high-speed and reliable computer data processing system for processing experimental data, such as data acquisition, data compression and storage, data decompression and query, as well as data analysis. The implementation of computer data processing application software （CDPS） for EAST NBI is presented in this paper in terms of its functional structure and system realization. The set of software is programmed in C language and runs on Linux operating system based on TCP network protocol and multi-threading technology. The hardware mainly includes industrial control computer （IPC）, data server, PXI DAQ cards and so on. Now this software has been applied to EAST NBI system, and experimental results show that the CDPS can serve EAST NBI very well.     

开滦矿区软岩巷道新支护体系研究

为了解决开滦矿区软岩巷道支护问题,应用理论分析和现场试验等手段,并结合开滦矿区多年的软岩巷道支护实践经验,研究了针对软岩巷道支护的新体系,即以强韧封层、稳压胶结为基础,以钢丝绳为筋骨,以锚注为主体的软岩巷道支护技术新体系。同时,通过建立与软岩巷道围岩特征相对应的力学模型,对影响软岩巷道新支护体系的主要因素,即巷道所处的应力环境、围岩性质与结构类型、巷道支护方式进行了分析。经现场工程验证,采用该支护体系的东欢坨矿北一大巷在变形稳定前的其总变形量不足50 mm,林南仓矿斜井下口交岔点最大变形量仅为67 mm。结果表明,该支护体系可以有效控制巷道变形,避免了矿井软岩巷道在服务期间的多次维修。     

基于SVM的非相关线性判别分析算法研究

基于基因表达谱对组织样本进行分类,在疾病诊断领域,是个非常重要的研究课题。在基因表达数据中,基因的数量（几千个）相对于数据样本（几十个）的个数通常比较多;也就是说,数据的维数相比于数据点的个数来说比较高（这个就是采样不足问题）。过高的维数（特征或基因数）将给分类问题带来极大的挑战。提出了结合非相关线性判别式分析方法（ULDA）和支持向量机（SVM）分类算法,对结肠癌组织样本进行分类识别,并同其他方法作了比较研究,分类效果得到了提高;结果表明了该方法的可行性和有效性。     

射频负离子源分布式定时同步系统设计

为满足负离子源中性束注入系统对定时同步的功能需求,设计了射频负离子源分布式定时同步系统.通过精密时钟同步协议对中性束系统中的各子系统进行同步控制,建立统一的时钟基准.实现精准控制各子系统的投入时序以及运行时间,有效提高定时精准度,保证每炮实验完整有序进行.实验测试结果表明:目前同步控制精度控制在1 μs以下,满足时序控...     

基于卷积神经网络的近红外光谱模型迁移研究

由于不同仪器传递函数的差异,会出现同物不同谱,同谱不同物等现象,因此在旧仪器建好的模型不能被新仪器上采集的数据集直接共享使用.传统方法是在新仪器上采集大量数据重新建模,此过程费时费力,导致光谱的模型利用率低.针对这些问题,采用卷积神经网络(convolutional neural network,CNN)架构建模,完成...