微机控制激光雕刻图像的方法研究

本文研究了微机控制激光雕刻系统中的图像处理方法，分析了激光雕刻系统的固有特点，提出了适合于激光雕刻的几个图像处理方法，这些方法已应用于实际雕刻控制，效果十分理想。     

Thermal unfolding of β‐lactoglobulin, α‐lactalbumin,and bovine serum albumin. A thermodynamic approach

Heat‐treatment is one of the most commonly used processes in food preparation technology. An understanding of the thermodynamics of protein stability and of conformational changes of proteins, acquired through the measurement of the denaturation temperature, is therefore of particular importance. This paper attempts to shed light on the interpretation of recent calorimetric data on the thennal denaturation of bovine β‐lactoglobulin, α‐lactalbumin, and bovine serum albumin by showing that thermodynamic parameters of heat‐induced unfolding, measured by differential scanning calonmetry, are closely related to the prevailing chemical conditions such as pH, concentration of ions, protein purity, and protein concentration.     

土石坝筑坝材料基本参数概率统计与相关分析

对９５个已建土石坝工程各种土料指标进行了概率统计分析，其结果可望为土石坝可靠性设计的参数取值提供参考，同时，以重粉质壤土为代表，研究了筑坝材料各指标间的相关性。     

EDXRF中复杂基体效应的一种校正方法研究

系统地介绍了一种用特征参数和相似分类法解决能量色散Ｘ射线荧光（ＥＤＸＲＦ）分析技术中复杂基体效应影响的方法，给出了应用事例。该方法可以推广到其它复杂类型的分析对象，具有较广泛的适用性。     

Cryptography and teleinformatics

Numerical networks completely transform the security problems about files and communications. Nowadays, in data processing, normalised tools are being put to use. Study of new services emphasizes preoccupations that were formerly of secondary interest, such as discretion, identification, signature… “Garantir” is the french word that covers up all these concepts. The link with teleinformatics will lead to forge a new word: “the garantics”.The increasing importance of data processing brings dangers for private life, individual and public freedom. The governmental preoccupations in this matter are expressed by new laws adapted to this new situation.Recent theoretical and technological developments in the field of public cryptology allow one to constitute the security software procedures and hardware devices necessary for the application of new legislative measures.But, taking into consideration the demands upon national security these recent developments arise also serious legal problems for the “garantics” clearly favor the enciphering party to the party who tries to break the code.Yet, in the face of the increasing investigation means of big firms both public and private, and in the face of the ever-increasing automation of files the “garantics” seem quite necessary to enforce the individual freedom and protect private life.     

Potentiometric and Thermodynamic Studies of 2-Acrylamidosulfamethazine and Its Metal Complexes in Monomeric and Polymeric Forms

2-Acrylamidosulfamethazine (ASM) was synthesized and characterized by elemental analyses and IR spectroscopy. Proton-monomeric ligand dissociation and metal-monomeric ligand stability constants of ASM with some metal ions were determined potentiometrically in 0.1 M KCl and 40% (v/v) ethanol–water mixture. In the presence of 2,2-azobisisobutyronitrile as an initiator, the dissociation and stability constants of ASM were determined in polymeric form (PASM). The influence of temperature on the dissociation of ASM and the stability constants of their complexes in monomeric and polymeric forms were precisely studied. The pK^H value of PASM was found to be higher than ASM, which indicates that the vinyl group in the monomeric form decreases the electron density on nitrogen and hence reduces the N–H bond strength. The stability constants of the metal complexes in polymeric form are higher than those of the monomeric form. This reveals that the ligand in a polymeric form may be considered as a better complexing agent.     

高压吸附下的瓦斯放散初速度研究

实验中将常压吸附改为高压吸附,并适当改变其它实验参数,利用抚顺分院在国家"十五"攻关中研制的仪器对煤样0～60s内的放散速度规律进行研究,计算其放散量、曲线变化率、放散初速度和衰减规律,进而提出更合理、更全面、物理意义更明确的突出预测指标。     

Optimization of weighting methods of smoothing the discreteness error of distance sensors based on a frequency rangefinder

We present a method for locally optimizing the parameters of an arbitrary weighting function used to smooth the error due to the discreteness of a distance sensor based on a frequency rangefinder. Then we analyze how additive noise affects the error of measurement and we derive an expression for the dispersion of the error. The possibility that optimization of the weighting function parameters can minimize the total error is examined.Translated from Izmeritelnaya Tekhnika, No. 12, pp. 19–23, December, 2004.This revised version was published online in April 2005 with a corrected cover date.     

Thermal Diffusivity of La1−x Sr x MnO3 (x < 0.3)

Perovskite manganites are interesting because of their colossal magnetoresistance. In this work high resolution thermal diffusivity measurements of La_1–x Sr _x MnO₃ (0 x 0.3) single crystals in the temperature range from 250 to 400 K are presented. A photopyroelectric device in the standard back configuration has been used. The thermal diffusivity through second-order magnetic phase transitions, as well as through first- and second-order structural phase transitions has been measured. The critical parameters of the sample with x = 0.3 at the ferromagnetic-to-paramagnetic transition have been obtained, and are close to the values predicted by the Ising model.     

Active monitoring of the geometrical dimensions of sliding bushings

A method and a measurement-control system for the nondestructive testing of the geometrical parameters of sliding bushings during their production are considered.Translated from Izmeritelnaya Tekhnika, No. 9, pp. 32–35, September, 2004.