基于神经网络的立式罐壁温的软测量

针对立式罐由于设备本身限制 ,罐壁温度很难直接测得 ,本文提出了基于人工神经网络的软测量方式。并构造了立式罐壁温软测量的神经网络结构 ,运用实际测得数据对RBF网络进行训练和仿真 ,仿真结果证明了该方法的有效性。     

基于神经网络的裸体立式罐壁温的软测量

针对立式罐由于设备本身限制 ,罐壁温度很难直接测得 ,本文提出了基于人工神经网络的软测量方式 ,并构造了立式罐壁温软测量的神经网络结构 ,运用实际测得数据对RBF网络进行训练和仿真 ,仿真结果证明了该方法的有效性     

500m~3立式金属罐测量不确定度分析评定

文章对立式金属罐的基圆周长、径向偏差、罐壁厚度测量、圈板高度测量、罐的椭圆度、静压力修正值影响立式金属罐容量测量不确定进行分析。     

关于立式罐大容量标准测量仪的应用研究（二）

本文提出了一种利用便携智能化立式罐大容量标准测量仪在罐内测量基本直径和罐体椭圆度的新方法；并提供了将罐内贮液时外测得的基本直径与被测截面的径向偏差换算为空罐状态下的测量数据的计算公式     

压力传感器用于油罐测量的实验装置

本文介绍了一种新型立式金属罐自动化测量的实验装置。装置中将压力传感器用到立式罐中，实现了测量数据的自动采集；利用微处理器处理采集数据，实现了测量的智能化，提高了测量的准确性和可靠性。     

立式罐容量半径测量不确定度分析与研究

半径测量是立式罐容量计量的主要项目之一,本文通过对立式罐半径测量不确定度进行分析,来说明半径测量对立式罐容量计量的影响.     

基于机器人搭载的立式金属罐壁表面温度测量系统设计

立式金属罐容量计量中,罐壁圈板表面温度测量与修正是直接影响其容量计量准确性的重要因素。文章在现有方法基础上,提出并设计了一种基于机器人搭载的立罐罐壁圈板表面温度测量系统,以实现圈板温度测量方法的改进,提高大容量计量准确度。     

关于立式罐大容量标准测量仪的应用研究（一）

本文论述了中国计量科学研究院研制的立式罐大容量标准测量仪的结构及其主要计量性能和特点，提出了利用该仪器测量立式罐的圈板高度和径向偏差的新方法     

立式金属罐浮顶质量测量方法探讨

立式金属罐浮顶质量的测量是浮顶罐检定的主要部分之一，其测量结果误差的大小直接影响被检罐的测量不确定度。按照JJG168—1987《立式金属罐容量(试行)》检定规程规定的浮顶质量的测量方法对5万m^3浮顶罐进行周期检定，用已标定的浮顶罐。罐内盛装石油，测量被检浮顶罐浮顶质量时发     

对立式金属外浮顶罐带油测量方法的探讨

立式金属外浮顶罐（简称外浮顶罐）的测量一般需在清罐的情况下进行。但是，很多单位受种种条件的限制而不可能清罐，却急需对此罐进行测量和检定。鉴于这种情况时有发生，我站在总结多年检定经验的基础上．结合各种测量理论，制定出外浮顶罐带油测量的方法和步骤。通过一年多的使用和测试．认为此种方法测量结果的不确定度完全符合（或小于）《立式金属罐容量检定规程》中所规定的不确定度要求。     

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.