搪玻璃管道组成件简介及选用分析

在化工、石化、医药、染料、农药、食品制造、国防等工业生产装置和科学研究装置中广泛使用了各种规格的搪玻璃管道,其表面光洁、耐蚀性能优异,发挥了不可替代的重要作用。文章介绍了搪玻璃管道组成件的组成、标准现状以及选用过程中需要考虑的注意事项,结合具体实例进行了形象的说明与分析,对搪玻璃管道组成件的正确选用有一定的借鉴作用。

浅谈工业管道安装监检中管道组成件的质量控制

主要阐述了工业管道安装监检工作管道组成件的质量控制。

浅谈高压管道组成件的设计

比较两种法兰体系标准规范后,简述在高压组成件设计和施工验收中标准规范的选用,并提出相关建议。

课件点播系统中多媒体课件组成分析与研究

随着高职院校信息技术的发展,大多数高校在教学中都已经建立了课件点播系统,如何深入的了解课件,制作出符合内容及形式的课件,提高教学效率,是一个值得研究的课题,本文从课件的逻辑结构入手,分析研究了多媒体课件的结构组成,并对课件中的关系给予了定义的方法,为课件制作者提供了新的方法和思想,具有广泛而深远的意义。

基于欧美标准的燃气管道组成件的选型

根据澳门的工程实践,对燃气管道系统中的管子、管件、法兰等管道组成件及其选用标准进行分析,探讨了管道系统的质量保证。

面向动车组修程修制优化的关键零部件寿命预测方法研究

动车组作为一种高度复杂的交通运输工具,其关键零部件的可靠性直接关系到列车的安全运行。这些零部件在长时间的服役过程中,会受到各种因素的影响,如机械磨损、疲劳损伤等,从而导致其性能逐渐下降。因此,对这些零部件进行精准的寿命预测与管理,是确保动车组安全、高效运行的关键。列车寿命预测研究领域很多学者从确定性疲劳寿命和不确定性疲劳寿命进行预测,近年来针对飞机、船舶等高端装备领域的寿命预测研究越来越多,分别从力学、统计、检测技术等多领域基础理论对寿命预测进行研究。文章以动车组关键零部件为研究对象,融合车辆运行状态、检修运维等数据,引入数据挖掘技术能力,构建基于修程修制的关键零部件寿命预测方法,精准预测零部件剩余寿命周期,同时利用数字化手段动态监控其剩余寿命,为检修运维、备件管理精准决策提供数据支撑,为车辆安全运行提供基础保障,进而为铁路局有效降低列车运行成本提供决策依据。

PDS组合件的应用

介绍PDS组合件的应用,设计人员充分利用现有的PDS资源,以提高设计效率和设计质量。

石油化工装置中低压大口径管道设计探讨

介绍了石油化工装置中低压大口径管道组成件规格的选取、制造标准、特殊管件的尺寸计算和制造的要求,同时对大口径管子的壁厚计算、支管连接补强和柔性分析中考虑的因素加以阐述,并根据大口径管道的特点,结合具体工程,对大口径管道的布置和施工等进行探讨。

导热油管道安全设计时易忽视问题的探讨

结合导热油系统在某LNG储配站项目的应用,简述了导热油管道的危险性。从火灾危险性、管材选用、绝热材料三方面探讨了设计导热油管道时容易忽视的几个问题。详细论述了导热油管道火灾危险性的定义,管道及管道组成件的选择和不同绝热材料的选用及计算。

Composition Analysis on Intermuscular Fatty Acid of Qinghai Datong Yak

[ Objective] The study aimed to provide a theoretical basis for rational utilization of Datong yak resource. [ Method] By qualitative and quantitative determination with gas chromatograph, the composition and content of intermuscular fatty acid of Datong yak were compared with those of Datong yellow cattle. [ Result] Comparing with Datong yellow cattle, Datong yak had lower saturated fatty acid （SFA） content and higher polyunsaturated fatty acid （PUFA） content at extremely significant level （P 〈0.01 ）, while the difference of monounsaturated fatty acid （MUFA） contents between them was not significant （P〉0.05）. The PUFA/SFA and n-6/n-3 PUFA of Datong yak were in accordance with the recommended proportions. [ Conclusion] The intermuscular fatty acid composition of Datong yak is superior to that of local yellow cattle, which indicates that Datong yak meat has high nutritive value and wide development prospect.

J2EE-BASED DISTRIBUTED AND INTEGRATABLE MANUFACTURING EXECUTION SYSTEM

Using the Java 2 enterprise edition (J2EE), the industry standard technique, a component and web-based manufacturing execution system (MES), is presented. It is considered to be open, modularized, distributed, configurable, interoperable and maintainable. After introducing some core techniques of J2EE as the basic foundations of the proposed MES, this paper briefly analyzes the MES domain in manufacturing systems and constructs the abstract object and component model, and then establishes the MES architecture. This MES can be facilely integrated with other manufacturing applications. Finally, an example of integration with the enterprise resource planning (ERP) system is given.

ON TECHNOLOGICAL PR OBLEMS OF FABRICATION OF RELIEF DESIGNS BY ISOMETRIC TRANSFORMATION OF THIN SHEET

Some problems connect ed with production of new light-weight filler type are considered for sandwich layers. Constructively, the filler is the folded structure that can be developed on a plane. This feature makes it possible to produce the filler by isometric t ransformation of thin sheet through local bending without material stretching.Th e main difficulty is that the bending must be carried out along all lines of com plex-shaped marking-out at a time. The problem of shaping can be solved by use of the original shaping device that can be transformed in operation. The herein -presented technology of production makes it possible to fabricate parts with d eep relief using a wide gamut of different materials even as the thin-sheet met al alloys and paper.

Software Composition of Different Security Level Components

In this paper the authors show how software component design can affect security properties through different composition operators. The authors define software composition as the result of aggregating and/or associating a component to a software system. The component itself may be informational or functional and carry a certain level of security attribute. The authors first show that the security attributes or properties form a lattice structure when combined with the appropriate least upper bound and greatest lower bound type of operators. Three composition operators, named C l, C2 and C3 are developed. The system＇s security properties resulting from these compositions are then studied. The authors discuss how different composition operators maintain, relax and restrict the security properties. Finally, the authors show that C1 and C2 composition operators are order-sensitive and that C3 is order-insensitive.

Integration of Individualized Management Systems （MSs） as an Aggregating Factor of Sustainable Value for Organizations An Overview Through a Review of the Literature

Nowadays, there exist various standards for individual management systems （MSs）, at least, one for each stakeholder. New ones will be published. An integrated management system （IMS） aims to integrate some or all components of the business into one coherent and efficient MS. Maximizing integration is more and more a strategic priority in that it constitutes an opportunity to eliminate and/or reduce potential factors of destruction of value for the organizations and also to be more competitive and consequently promote its sustainable success. A preliminary investigation was conducted on a Portuguese industrial company which, over the years, has been adopting gradually, in whole or in part, individualized management system standards （MSSs）. A research, through a questionnaire, was performed with the objective to develop, in a real business environment, an adequate and efficient IMS-QES （quality, environment, and safety） model and to potentiate for the future a generic IMS model to integrate other MSSs. The strategy and research methods have taken into consideration the case study. It was obtained a set of relevant conclusions resulting from the statistical analyses of the responses to the survey. Globally, the investigation results, by themselves, justified and prioritized the conception of a model of development of the IMS-QES and consequent definition and validation of a structure of an IMS-QES model, to be implemented at the small- and medium-sized enterprise （SME） where the investigation was conducted.

Implementation method of Oil and Gas Geologic Information System with ArcGIS Engine

ComGIS is the mainstream of developing GIS currently.Developing Geographic Information System with the technology of components can reduce the difficulties of developing,improving the developing efficiency and enhancing the flexibility and opening of system.ArcObjects(AO) is based on the technology of COM,and ArcGIS Engine(AE) is a set of embedded AO which can extend to various platforms.Compared with AO,ArcGIS Engine can shorten the period of developing and improve the efficiency greatly.Having introduced the techniques of ArcObjects and ArcGIS Engine,we offer the method of developing GIS with Visual Basic and ArcGIS Engine with Oil and Gas Geologic Information System.

Design of C8051F350-based Intelligent Pressure Sensor

In order to overcome the deficiencies of traditional pressure sensors, a kind of intelligent pressure sensors with temperature correction is designed. Qccording to the intelligent sensor system of composition and range of applications, with fully taking into account the parameters of the connection between of co-ordination, we chose a good usability, high reliability and low cost components composed of the entire measurement system, with controlling and dealing with in 80C51 miller, the system had the temperature and pressure parameters with automatic measurement, amplification, A/D conversion, the weak signal locked amplification, as well as PhaseSensitive Detection （PSD）, common-mode signal rejection, the collected signal de-noising processing, cross-sensitivity of the decoupling and show the results. It also has a self-test, automatic temperature condition and on, site communications and other functions.

Low- and Mid-High Latitude Components of the East Asian Winter Monsoon and Their Reflecting Variations in Winter Climate over Eastern China

The present study defines a low-latitude component (regionally averaged winter 1000-hPa V-winds over 10 25°N, 105 135°E) and a mid-high-latitude component (regionally averaged winter 1000-hPa V-winds over 30 50°N, 110 125°E) of the East Asian winter monsoon (EAWM), which are denoted as EAWM-L and EAWM-M, respectively. The study examines the variation characteristics, reflecting variations in winter climate over eastern China, and associated atmospheric circulations corresponding to the two components. The main results are as follows: 1) the EAWM-L and EAWM-M have consistent variation in some years but opposite variations in other years; 2) the EAWM-M index mainly reflects the extensive temperature variability over eastern China, while the EAWM-L index better reflects the variation in winter precipitation over most parts of eastern China; and 3) corresponding to the variation in the EAWM-M index, anomalous winds over the mid-high latitudes of East Asia modulate the southward invasion of cold air from the high latitudes and accordingly affect temperatures over eastern China. In combination with the variation in the EAWM-L index, anomalous low-latitudinal winds regulate the water vapor transport from tropical oceans to eastern China, resulting in anomalous winter precipitation. These pronounced differences between the EAWM-L and the EAWM-M suggest that it is necessary to explore the monsoons' individual features and effects in the EAWM study.

Scalable Arbitrated Quantum Signature of Classical Messages with Multi-Signers

Unconditionally secure signature is an important part of quantum cryptography. Usually, a signature scheme only provides an environment for a single signer. Nevertheless, in real applications, many signers may collaboratively send a message to the verifier and convince the verifier that the message is actually transmitted by them. In this paper, we give a scalable arbitrated signature protocol of classical proved to be secure even with a compromised arbitrator. messages with multi-signers. Its security is analyzed and proved to be secure even with a compromised arbitrator.

A study on the design of a hybrid policy for carbon abatement

A necessary way to mitigate global warming is carbon reduction, which the international community is now actively promoting. China has committed a target goal for carbon reduction to the international society, and has devoted a great effort toward researching the impact of related policies. Carbon taxation and carbon trading are the two main mechanisms to advocate carbon abatement, which many countries have been using. Each of these two mechanisms possesses advantages and disadvantages, and an appropriate combination of them can make best use of their advantages while bypassing their disadvantages, creating a superior mechanism. In our opinion, the main differences between these two mechanisms are that carbon taxation has a lower institution cost(consisting of the related infrastructural investment and the regulation cost,etc), and is easier to operate, but lacks the flexibility in response to variations of market conditions. However, this flexibility is just the origin of risk, which increases the difficulty for firms in their decision of carbon abatement and is an indirect way to incentivize carbon abatement, compared to carbon trading, which has a more direct effect in carbon reduction. Based on the above observation, we present a hybrid mechanism of carbon abatement, which is an organized combination of carbon taxation and carbon trading. It consists of two parts: first, the carbon taxation, which has a progressive tax rate, second, the carbon trading. Small firms will only pay the carbon tax, while large firms, will first need to get the initial carbon emission quotas by some way, and then trade it in the carbon market if necessary. For firms with extra emissions,they will receive a punishment according to a high carbon tax rate. This hybrid policy considers the equity between different firms in carbon emission rights as well as the efficiency of the mechanism while decreasing the risk level for firms in the carbon emission decision, making it superior to the two previous policies. We also analyze the feasibility of this hybrid policy in China,address some important issues in the implementation of this hybrid policy in China and present the relevant suggestions. The discussion in this paper can serve as a reference to the government in the decision of carbon policies.