利用VB在Solid Works环境下开发注射模参数化标准件库

随着CAD技术的发展,CAD软件在模具行业中的使用越来越普及.但同时业内人士对CAD软件的功能要求也越来越高,希望它更专业化和本地化.正是在此期望下针对模具行业的CAD系统的研制和开发就显地格外必要.文章就模具CAD系统中注塑模标准件库模块的建立提出了自己的一些思路.即以Solid Works为开发平台,通过Solid Works提供的API接口和利用VB强大的编程能力,在Solid Works环境下来实现注塑模三维标准件库的建立.为解决模具设计中大量标准件的快速造型提供了有效的途径,提高了模具设计效率.     

Visual C++对Solid Works二次开发技术及应用

介绍了三维CAD系统Solid Works的特点及其API函数,讨论了对Solid Works进行二次开发的关键技术及系统设计,并通过实例阐述了利用Visual C 工具开发Solid Works动态连接库DLL的步骤和编程方法,这有利于对Solid Works进行本地化和专业化的二次开发工作,使其在我国企业中更有效地发挥作用.     

API圆螺纹套管连接强度分析

API标准圆螺纹套管结构简单,加工制造容易,成本低,在国内外油气田上广泛使用。介绍了圆螺纹套管连接强度的影响因素及其发展趋势,讨论了在不同的粘扣、高温、高压等条件下的API圆螺纹套管连接强度,为圆螺纹套管在各油田的继续投入使用提供了技术支持。     

API682密封标准浅析

ＡＰＩ６８２ 是美国石油协会１９９４ 年发布的石油、化工类泵用机械密封标准,本文对ＡＰＩ６８２ 发布的目的以及密封范围、形式、配置、尺寸、公差、密封腔压力、冲洗管路、辅助设备、试验和数据表等作了简要的分析。     

Linux系统下USB2.0设备驱动程序的开发

USB2.0版本的发布使USB已逐步成为一种标准接口,Linux系统下的USB设备驱动程序的开发是一项比较繁琐的工作。本文介绍了USB2.0总线规范、LinuxUSB子系统及设备驱动程序框架,并重点描述了LinuxUSB设备驱动程序编程方法和开发实例。     

基于VB的点火线圈测试软件设计

介绍一个基于PC的点火线圈数据采集处理系统的软件设计。重点介绍了在VB中使用Windows API函数的技巧及在VB本身的功能局限的情况下，如何对10口进行操作。     

Prediction models for multiphase-flow-induced corrosion of API X80 steel in CO2/H2S environment

In the offshore oil and gas industry, mainly focusing on the use of rigid or flexible pipes of subsea infrastructure applied to risers or flowlines, one of the greatest difficulties is the interpretation of the combined effects of the various correlated phenomena (hydrodynamic effects of intermittent flow, the effects of corrosivity of the environment in addition to variations in pressure, temperature, and dynamic loading). On the basis of this scenario, defining the degree of severity of each of the correlated system variables becomes of fundamental importance for establishing reliable criteria for selecting materials for subsea application. The established flow pattern directly affects the corrosion rate (or the pipe material mass loss), but the balance of other variables including possible changes in the physical and transported fluid chemical properties may increase the damage up to an order of magnitude, which is a piece of information normally not foreseen in design criteria. Therefore, to improve the understanding of the corrosion study influenced by multiphase flow, a testing loop was designed and assembled at the Corrosion and Protection Laboratory of the Institute for Technological Research, in which API X80 steel coupons were positioned in locations with a 0° and 45° inclinations. Tests were conducted by varying the partial pressure of the gaseous phase containing blends of CO₂ and H₂S with N₂ balance, mixed with the liquid phase containing light oil and heavy oil in water with salinity (NaCl)-simulating oil well conditions with 80% water cut. The main objective of this study is to establish models that can predict the corrosion intensity in conditions close to those obtained experimentally. To achieve results, the multiple regression and Box–Cox transformation methods were applied. These models will make possible damage prediction and optimization of matrix parameters for the multiphase-loop test.     

钻井液材料质量标准制定与执行的一些认识

对比 ISO 13500(1998 年版)与中国相应的钻井液质量指标,看出中国钻井液行业标准基本上与 API 及 ISO 同步。提出制定钻井液材料标准要符合中国实际,检测项目以钻井液性能为主,辅以关键理化性能;测试程序应统一、明确;标准执行要在标准规定范围内灵活掌握。     

Preliminary hydrocarbon analysis of crude oils from Umutu/Bomu fields,south west Niger Delta Nigeria

Seven different crude oil samples were collected from two oil fields in the Niger Delta Nigeria. The bulk properties of these crude oils which include API gravity, reid vapour pressure; kinematic viscosity, dynamic viscosity, moisture, gum content and cloud point were analysed. Aliphatic biomarkers were used as supporting tool to deduce the geochemical characteristics such as thermal maturity, depositional environments, source of organic matter and extent of biodegradation. Results show that API° gravity ranged from 29.00° to 85.00°, specific gravity 0.65 to 0.88, 3.00 to 9.00, reid vapour pressure 3.00 to 9.00 kPa, kinematic viscosity 0.90 to 10.10 cSt, dynamic viscosity 0.70 to 8.90 cP, moisture content 0.13% to 26.00%, gum content 6.27 to 45.84 mg/L, cloud point 3.00 to 12.00 °C, pour point ?7.00 to 4.00 °C and flash point <30.00 °C. Distribution of n-alkanes (Pr/Ph, and isoprenoide/n-alkanes ratios) reflects that the oil samples originated mainly from terrestrial organic sources deposited in an oxic paleoenvironment.     

基于UEFI的安全模块设计分析

传统BIOS是用汇编语言编写的,一般固化在主板的CMOS芯片中,利用电池来维持BIOS的硬件配置信息,维护和发展都很困难。文章简单分析了基于传统BOIS技术的安全模块软件系统设计和基于UEFI技术的安全模块软件系统设计,针对两种体系的软件维护和安全性进行了对比分析。