强脉冲辐射场非平衡硬X辐射测量技术

本文介绍了强脉冲辐射场非平衡硬Ｘ辐射谱测量方法。文中对测量原理、关键定标技术进行了叙述。     

Modelling the dynamics of multicomponent ion exchange with dissimilar diffusivities of components

The dynamics of multi-ion exchange is investigated with consideration for electric fields arising in sorbents when the ions with distinct diffusivities are exchanged. A new model for this process is developed. Simulation shows that the electric field can affect the dynamic break-through curves. The proposed model can be used for the creation of a new process of sorbents regeneration and microcomponents concentration.     

Macroscopic model for multispecies ion-exchange kinetics

A model for multispecies ion-exchange kinetics based on the Nernst-Planck equation is suggested. It is analyzed in comparison with the “locally-determinate” model described by Hwang and Helfferich [1]. The model makes possible simple computation. The conditions for the occurrence of unusual kinetic curves with a maximum are clarified. The proposed model is developed for different types of kinetic problems and verified by the experimental investigation of a kinetics in ternary systems.     

衰减曲线分析的诺模图

基于Arps递减方程,建立了衰减曲线分析的诺模图。应用该诺模图,可以方便地确定油气田的可采储量。     

筒形件反旋工艺塑性流动刚塑性有限元分析

建立了筒形件反旋工艺平面变形刚塑性有限元分析的力学模型，比较了把反旋工艺视为正挤和本文力学模型条件下的速度场，有限元分析结果与反旋实际条件相符。     

加速器磁场测量的霍尔多探头装置

描述了用于加速器磁场测量的霍尔多探头装置,它包括一个具有三只恒温盒(内有58只霍尔片)的测磁长臂,高精度磁场检定系统以及数据自动获取系统。分别叙述了霍尔片的定位、恒温、校准、数据采集、处理等内容。并提出了多探头装置测量中霍尔片稳定性的重要性。给出了在我们条件下的一些具体数据。本装置已应用在兰州重离子研究装置(HIRFL)的建造过程中,实践证明它能有效地高质量地满足加速器磁场测量的要求。     

红外车辆分离子系统的设计和性能分析

在机动车磁卡收费系统中,红外车辆分离子系统是一种重要设备,它是由平行等距红外线族构成的平面检测系统,其性能直接影响收费系统的正常运转。本文介绍该子系统的设计并对系统性能进行分析,得出:子系统采取相关检测技术后,不仅能有效地抑制外界干扰、噪声,还具有抗相邻红外信号干扰能力。     

RADIOACTIVE OR NATURAL TRACER。TECHNIQUES FOR LEAK DETERMINING OF DAM ABUTMENT

Infiltration and localization of preferential infiltration zones at the dam abutment are measured using radioactive tracer tests of flow in boreholes,meanwhile interconnection between boreholes and the energing water points is analysed.The theory and practice of radioactive tracer synthetic detective method are described to give methods and calculation formulae used under the condition of stable flow in single well to measure permeability coefficient and hydrostatic heads.Major single hole techniques including measurement for seepage line,velocity,rate of seepage flow and relationship of recharge of groundwater in aquifers are introduced briefly.The possibilities offered by natureal tracers are analysed,uincluding electric-conduct,pH-value and temperature of water as well as stable isotopes(D,^18O) and tritium.Furthermore,the sensibilities of this theory and methods were confirmed by detecting seepage flow field of Xinanjiang Dam.     

物联网在现代物流业中的应用研究

物流是物联网较早落地的行业之一,物联网的应用从根本上提高了对物品生产、配送、仓储、销售等环节的监控水平。文中通过对物联网体系构架的分析,研究了物联网在物流业中的主要应用领域及其在物流业中的推广障碍,探讨了物联网在物流业中的应用发展趋势。     

基于WebGIS的田间环境监测系统平台的设计与实现

为了实现田间环境信息的可视化查询分析与统计,本文借助于无线传感网络和GPRS通信网络硬件平台以及TopMap软件平台,开发了基于WebGIS的田间环境监测系统。该系统采用了C/S与B/S模式相结合的运行体系结构,ASP.NET为前台开发工具,SQL SERVER2005为后台数据库,TopMap World 6为WebGIS开发平台。系统实现了田间环境信息的动态交互、实时更新以及基于地图的田间环境信息空间查询、统计分析和生成报表等功能。