ArcGIS Engine支持下的排污口管理与水质预测信息系统的实现

从区域水环境管理的要求出发，对利用ArcGIS Engine开发的排污口管理与水质预测信息系统的开发过程进行介绍。简要介绍了该系统的目标、组成和主要功能，并从数据库建立、数据管理子系统、排污口管理子系统、水质预测子系统功能实现等方面对系统实现做了较为详细的阐述。     

自动监测数据管理及网络查询系统的设计与应用

文章介绍了环境空气质量日报及水质自动监测周报数据管理软件和基于web方式查询系统的总体设计及应用。以Microsoft Visual Basic6．0为开发平台，结合Access2000数据库平台设计开发了数据管理软件。运用ASP网络编程技术，实现了环境自动监测数据的网络查询和共享。经过在本机服务器系统实际应用效果较好，将其移植到真正的web服务器上即可实现开放式网络查询功能。     

城市空气质量数据管理系统的开发与研究

结合我国重点城市空气质量监测的现状，简要介绍了城市空气质量数据管理系统开发的目的和必要性，然后从技术选择、系统数据流程图，系统、功能、等５个方面对系统进行分析，最后阐述了系统的应用前景。     

辽宁省地表水监测地理信息系统的开发与设计

按辽宁省水污染治理项目进行地表水监测地理信息系统的设计与开发 ,使系统具有面向多用户 ,业务功能完善和多种类型数据管理的目标。设计以ARC/INFOR为平台 ,DELPHI为开发工具 ,采用面向对象的开发方法 ,采用CLIENT/SEVER为体系结构对系统进行开发和设计。主要介绍系统构成以及系统功能     

基于WIFI通信的目标识别与定位系统

当今,物联网开始向可视化、智能化及数字化的方向发展,将WIFI,GPS,RFID引入物联网中可以有效提升物联网技术的信息化。本文主要以集装箱系统的设计为例,来分析基于WIFI通信的目标识别与定位系统的设计方式与实现方法。整个系统需要由特征信息标签、系统终端、GPS定位系统、数据管理终端组成。其中,系统终端的开发与研究是核心。     

生态环境科学研究中的数据管理

本文简要介绍了生态环境科学研究中数据管理的基本概念，详细介绍了数据文档文件的建立工并讨论了数据管理的数据共享政策在数据管理中的重要作用。     

精密冲裁液压模架和模芯的制造

一、通用液压模架的结构及其作用液压模架的上、下模板中分别设计有一定大小的油缸,通过一个简单油路的液压系统,以提供可调节的压力来实现精冲工艺所需的压边力和反顶力。下面介绍在普通压力机上常用的两种结构:1.圆锥面配方向销定位结构(参见图     

用VFP分析TH—880Ⅲ型微电脑烟尘平行采样仪的原始数据

本文针对烟尘测试工作的原始数据的处理，提出用VFP编程处理这一问题，指出了在环境监测工作中可以充分利用计算机的数据分析功能处理数据，提高工作效率。     

关于环境监测一体化管理平台构建研究

以环境监测核心业务流程为主线、质量管理体系为监控、规范与效率为目标,利用先进信息化技术研究开发,集行政办公、实验室分析、数据管理为主要内容的一体化管理平台,实现了环境监测信息的采集、统计分析和产品化,为公众、管理决策提供信息支持。     

油指纹快速分析辅助鉴别及油品信息可视化管理系统

针对海上溢油事故排查鉴别的需求,开发了一套油指纹数据管理和鉴别软件系统,系统包括综合信息数据库和数据分析鉴别两大组成部分。开发的数据库用来存储基础地理信息、油样空间信息、油样基本信息、油样二维谱图数据、油样特征指纹数据等。指纹分析鉴别模块实现了油样谱图的准确积分、特征指纹指标计算、油样比对鉴别、油样分类鉴别、油样检索排查等功能。系统开发完成后,在黄渤海多次溢油事故中得到了很好的应用,具有高效性和可靠性,极大提高了溢油事故排查工作的效率,为海上溢油事故执法调查提供了重要的技术支撑。     

Assessing the Performance of a Magnetostrictive-Actuated Tool Holder to Achieve Axial Modulations with Application to Dry Deep Hole Drilling

For machining operations such as drilling and tapping, the challenge of achieving dry machining is difficult due to the significant role that cutting fluid plays in lubrication and chip removal. A new approach for dry deep hole drilling of aluminum is presented. This new method utilizes a magnetostrictively actuated tool holder to modulate the axial position of a drill tip and thus vary the chip size. Under appropriate modulation conditions, small chips are produced that are relatively easy to evacuate through the drill flutes. The development of the magnetostrictive tool holder system is described and its performance is evaluated. The results of drilling tests performed with the magnetostrictive tool holder system are reported, and the new tool holder is demonstrated to offer promise as an alternative to drilling with a cutting fluid.     

筒形件无压边圈拉深工艺参数优化设计

通过对筒形件极限拉深系数的影响因素进行分析 ,确定合适的凸凹模圆角半径是提高拉深件质量的重要途径 ,将塑性理论和优化算法相结合 ,以筒形件达到最小的极限拉深系数为优化目标 ,对筒形件无压边圈拉深工艺参数优化设计进行了研究。并且通过具体算例证明了所采用的优化模型及算法是有效的     

VFP编程在计算总悬浮颗粒物采样浓度中的应用

本文简要论述了VFP编程语言在TSP浓度计算中的具体应用,内容包括计算程序的主体内容、含义以及程序当中的难点及亮点。     

Simulations and experiments in punching spring-steel devices with sub-millimeter features

This work demonstrates the feasibility of meso-scale (100 μm to mm) punching of multiple holes of intricate shapes in metals. Analytical modeling, finite element (FE) simulation, and experimentation are used in this work. Two-dimensional FE simulations in ABAQUS were done with an assumed material modeling and plane-strain condition. A known analytical model was used and compared with the ABAQUS simulation results to understand the effects of clearance between the punch and the die. FE simulation in ABAQUS was done for different clearances and corner radii of the punch, die, and holder. To complement modeling with real experiments and for the purpose of comparison, a set of punches and dies were made to punch out a miniature spring-steel gripper. Comparison of compliant grippers made by wire-cut electro discharge machining (EDM) and punching shows that realizing sharp interior and re-entrant corners by punching is not easy to achieve. However, the promise of realizing meso-scale parts with complicated shapes through punching is demonstrated in this work; and further work is identified and some strategies are suggested for improvement. The main contribution of this paper is in adapting the well-established punching and blanking operations to the meso-scale as a viable alternative to making miniature devices currently dominated by lithography-based techniques.     

汗液作用下铝合金眼镜架腐蚀失效分析

通过金相分析、扫描电子显微镜(SEM)观察和能谱分析等检测方法,对某铝合金/硫酸阳极氧化膜眼镜架在汗液环境中的腐蚀失效行为进行了失效分析,结果表明:铝合金/酸阳极氧化膜在汗液环境中发生了严重的腐蚀,腐蚀形式以点蚀为主,局部出现裂纹,腐蚀均发生在阳极氧化膜完整性发生缺陷的部位,铝合金基体在晶界上优先发生腐蚀,点蚀坑生长和裂纹扩展均沿晶界进行;阳极氧化膜完整的区域,阳极氧化膜腐蚀不明显.     

Extending the inverse receptance coupling method for prediction of tool-holder joint dynamics in milling

Recently, receptance coupling substructure analysis (RCSA) is used for stability prediction of machine tools through its dynamic response determination. A major challenge is the proper modelling of the substructures joints and determination of their parameters. In this paper, a new approach for predicting tool tip FRF is presented. First, inverse RCSA formulation is extended so that the holder FRFs can be identified directly through experimental modal tests. The great advantage of this formulation is its implementation in arbitrary point numbers along joint length. Therefore, in comparison with previous inverse RCSA approaches, a more realistic joint model can be considered. In addition, due to applying the new approach, additional costly modal tests on the gauged tool are not required. This characteristic makes it possible to determine the holder FRFs without separating the tool; especially in situations where the holder end is inaccessible. The inclusion of joint parameters effect in the identified holder FRFs is another main advantage of such approach. Consequently, for identification of joint parameters, there is no need to use common error optimization based on fitting methods. The effect of overhang length is investigated through some analytical study and also experimental validation. Results show that the predicted tool tip FRF is exact in analytical case. Moreover, due to less noise effect, the predictions based on identified FRFs of longer tools are more accurate than the shorter ones (in experimental case).     

摩托车后轮毂压铸模设计

摩托车后轮毂压铸模具精度要求高 ,且结构复杂。为满足铸件的技术要求 ,要合理选用压铸设备 ,合理地设计模具结构。分析了摩托车后轮毂的结构特点 ,介绍了摩托车后轮毂压铸模的结构 ,并详细说明了模具浇注系统、溢流系统、冷却系统、推出机构的设计。     

客车常用锻件锤上模锻CAPP系统的开发

介绍了以VisualBasic为开发平台 ,以SOLIDWORKS为图形工具的锤上模锻CAPP系统 ,系统的使用者只需输入零件几何参数 ,即可自动进行冷、热锻件及模锻工艺的设计 ,从而彻底克服了传统模锻工艺设计的缺点     

用CAXA电子图板和AutoCAD2000设计电刷端盖压铸模

主要介绍了CAXA电子图板和AutoCAD2 0 0 0在电刷端盖压铸模设计中的使用方法 ,论述了电刷端盖压铸模设计中涉及的压铸机选择 ,分型面选择和浇注系统的设计等技术问题。     

研究单位压边力值对板料成形性能的影响

主要介绍板料在拉深成形过程中单位压边力值对板料成形性能的影响。研究方法采用仿真技术 ,指出板料在成形过程中如按最初设定的单位压边力值进行成形 ,那么 ,板料成形过程中单位压边力值将逐渐增大 ,严重影响板料成形极限。如果采用控制板料在成形过程中压边圈下坯料的单位压边力值 ,将提高板料成形极限。其结论为生产现场提高板料成形性能和表面质量提供了一种可实施的方法。