空灌油网络系统的研制

通过对数控灌油装置的误差讨论，并在此基础上设计了采用ＲＳ－４８５计算机网络、ＧＥ－ＮＩＥ组态软件、ＡＤＡＭ－５０００系列数据采集器和低压损强耐磨的ＬＣＢ－９８００系列不锈钢椭圆齿轮流量计相结合组成的数控灌油网络系统。     

采用智能椭圆齿轮流量计的数控灌油网络的研制

讨论了智能型椭圆齿轮流量计的研制方法 ,并设计了采用RS - 4 85计算机网络、GENIE组态软件和智能型椭圆齿轮流量计相结合组成的数控灌油网络系统     

采用智能椭圆齿轮流量计的数据灌油网络的研制

讨论了智能型椭圆齿轮流量计的研制方法，并设计了采用RS-485计算机网络、GENIE组态软件和智能型椭圆齿轮流量计相结合组成的数控灌油网络系统。     

中国方圆标志认证委员会质量体系认证企业名单

(2 0 0 1年 1月 ) (初审 )序号企　业　名　称注册号注册情况体系覆盖范围颁证日期1九牧王 (福建 )服饰发展有限公司 1 90 1Ｂ0 0 0 1西裤的制作 2 0 0 1 - 1 - 42江苏太阳集团公司 1 90 1Ｂ0 0 0 2 电缆汇线桥架、支吊架 ,母线槽 ,仪表管阀件 ,开关柜 (高低压 )的制造 2 0 0 1 - 1 - 43河南金雀电气股份有限公司 1 90 1Ｂ0 0 0 3 复评1 997Ｂ41 1ＤＤ862ａ系列单相表 ,ＤＤ580系列单相表 ,Ｄ86系列三相表 ,Ｄ66系列多功能表 ,全电子系列电度表的生产 2 0 0 1 - 1 - 44泉州丰泽区德源轴承有限公司 1 90 1Ｂ0 0 0 4外球面带座轴承的生产 2 0 …     

试论数控机床如何保证加工质量

数控车削加工技术已广泛应用于机械制造行业,如何高效、合理、按质按量完成工件的加工,每个从事该行业的工程技术人员或多或少都有自己的经验。本文以广州数控设备厂生产的GSK980T系列机床为例,介绍本人在数控车削加工过程中的体会。     

国家质量技术监督局司发文质技监标函［2000］59号

关于统一安排ＧＢ/Ｔ 1- 2 0 0 0和ＧＢ/Ｔ 190 0 0 -ＩＳＯ 90 0 0 -2 0 0 0系列标准宣贯活动的通知各省、自治区、直辖市和计划单列市质量技术监督 (技术监督 )局 ,国务院各有关部门 ,各直属标准化技术委员会 :为密切跟踪国际标准化发展趋势 ,实现与国际惯例接轨 ,我局正在积极组织力量加紧修订ＧＢ/Ｔ 1《标准化工作导则》和ＧＢ/Ｔ 190 0 0《质量管理和质量保证》系列国家标准 ,并准备于年内发布 2 0 0 0版新标准。为保证社会各方面及时、正确地理解这两套重要的系列标准 ,推动标准的贯彻实施 ,我司对这两套系列标准的宣贯工作做了统一…     

浅谈沥青路面纵向裂缝的成因及处治措施

结合施工经验,针对沥青路面纵向裂缝产生的原因与特征,分析其病因,提出了灌油修补法、乳化沥青稀浆封层、沥青混合料罩面法等处治措施,并结合具体工程实例介绍其具体应用,供同行参考。     

数控仿真系统的开发与研究

介绍了数控原理、数控机床、数控仿真技术以及数控仿真系统开发的原理及方法；通过基于OpenGL的数控加工仿真软件系统验证了可行性。此仿真系统的实现，是基于OpenGL，用Visual C＋＋6．0编写的．其中调用了多个OpenGL库函数。     

岳高东的简易油桶灌油器

目前国内还没有成熟的装置或工具,很多单位存在向油桶大规模装油的困难。传统灌油引起的耗时、耗力,操作不便,因此,设计制造一种简单、方便、实用、高效的工具,才能有效提高工作效率。     

GB/T 9112～9124-20000《钢制管法兰》系列标准介绍

原国家质量技术监督局 2 0 0 0年 9月 2 8日批准发布了ＧＢ Ｔ9112～ＧＢ Ｔ 912 4 2 0 0 0《钢制管法兰》系列标准 ,该系列标准由全国管路附件标委会归口并负责制定 ,2 0 0 1年 7月 1日起开始实施。ＧＢ Ｔ 9112～ＧＢ/Ｔ 9112 2 0 0 0《钢制管法兰》系列标准是ＧＢ Ｔ9112～ＧＢ Ｔ 9131-1988《钢制管法兰》综合标准的修订版 ,包括法兰尺寸标准 31个 ,法兰型式与参数、法兰技术条件标准各 1个 ,共计 33个标准 ,替代了ＧＢ Ｔ 9112～ＧＢ Ｔ 912 4-1988和ＧＢ912 5 Ｔ -1988共计 16 9个标准。为了便于新标准的贯彻实施 ,现将国标《钢制管…     

Estimation of Parameters of Universal Distribution of Moments of Failure of Products

A method is proposed for estimating the parameters of a mixture of exponential and Weibull distributions for which the accuracy of preliminary estimates obtained by graphical analysis is refined in accordance with the criterion of maximum likelihood. The efficiency of the proposed method is supported by the results of statistical modeling.     

Evaluation of optical properties of highly scattering media by moments of distributions of times of flight of photons

A novel method for the determination of the optical properties of tissue from time-domain measurements is presented. The data analysis is based on the evaluation of the first moment and the second centralized moment, i.e., the mean time of flight and the variance of the measured distribution of times of flight (DTOF) of photons injected by short (picosecond) laser pulses. Analytical expressions are derived for calculation of absorption and of reduced scattering coefficients from these moments by application of diffusion theory for infinite and semi-infinite homogeneous media. The proposed method was tested on experimental data obtained with phantoms, and results for absorption and reduced scattering coefficients obtained by the proposed method are compared with those obtained by fitting of the same data with analytical solutions of the diffusion equation. Furthermore, the accuracy of the moment analysis was investigated for a range of integration limits of the DTOF. The moment analysis may serve as a comparatively fast method for evaluating optical properties with sufficient accuracy and can be used, e.g., for on-line monitoring of optical properties of biological tissue.     

Estimation of potentialities of methods of summation of direct measurement errors

Conventional methods for summation of direct measurement errors are considered. Conditions under which these methods provide consistent results are stated. It is proposed to utilize for characteristic of the total error, its interval estimator or the half-sum of the value obtained by adding up its arithmetic and geometric random errors.Translated from Izmeritel'naya Tekhnika, No. 4, pp. 10–12, April, 1995.     

空压机轴承箱蜗壳温度探头油封改造

由于空压机进气侧轴承箱蜗壳温度探头密封效果不好,使空压机及其后续管道受到油污染。后将温度探头的O形圈密封改为骨架油封,杜绝了轴承箱漏油问题。文章简介空压机的结构和技术参数,详细介绍了骨架油封的制作和优点。     

Characteristics of mechanical properties of materials in studies of conditions of attainment of marginal states

It is shown that conditions of attainment of marginal states in the material of structural components are formulated on the basis of analysis of force and deformation criteria of formation and development of destruction. The parameters of these criteria are data on types of structural materials, standard and special characteristics of their mechanical properties, structural forms of considered elements of the equipment, and their operating stress loading. In this case, the construction of a system of state equations for describing interrelation of current damage, external actions, and responses to them is based on the concept of calculating variations in properties of materials at all stages of the design life cycle.     

Determination of parameters of microstructural inhomogeneity of deformation of metals by the method of modeling

The article suggests a method of evaluating the microstructural inhomogeneity of deformation of metals by modeling. The method includes the measurement of deformations of metal according to meshes of a dividing grid with small base and the calculation of the distribution parameters of microdeformations in model representation. It is shown that the modeling method makes it possible objectively to evaluate the microinhomogeneity of deformation of metals independently of the chosen mesh size of the dividing grid. New structural characteristics are introduced: the base and wave of variation expressing the degree of crumbling or amalgamation of metal grains by inhomogeneity of deformation.Translated from Problemy Prochnosti, No. 7, pp. 40–44, July, 1991.     

Analysis of the rate of propagation of the wave of change of boiling modes

An approximate analytical expression is derived for the velocity of the front of the wave of change of boiling modes on a rod and on a plate. The impact of the Thomson effect and of the heater orientation in the gravity field is included. Adequate agreement is demonstrated between the derived relations and experimental data.     

水三相点复现的不确定度评定

水三相点是开尔文热力学温度的唯一基准点，也是ITS-90国际温标重要的定义固定点。因此，水三相点不确定度分析对整个温标的建立、温度量值传递起着至关重要的作用。近3年来，中国计量科学研究院研制出一系列高质量的水三相点容器，加强了水三相点的研究，为不确定度的分析提供了更为可靠的实验依据。同时，不确定度的分析也是客观评价新研制容器性能的一个重要指标。因此，根据实验结果对新研制容器所复现的水三相点进行了不确定度评定。评定结果表明，其扩展不确定度为0．16mK(k=2．69，P=0．99)。