一种用于相似图象识别的光电混合处理系统

针对以传统的光学相关为基础的图像识别难以识别相似图形的缺陷,提出并构建了解决这类问题的一种光电混合系统.该系统不仅结构简单,处理具有准实时的特点,而且实验结果表明这一系统对微小差异图形有很强的识别功能.     

Voltammetric Behavior of Sodium 7-Methoxyl-4''''-hydroxylisoflavone-3''''-sulfonate and Its Application

Introduction Daidzein (7,4'-bihydroxylisoflavone) is a main activ-ity constituent of the soybean isoflavones. It has activi-ties of hyperkinesias,14 inhibiting cancer cell growth,5,6 accelerating the formation of bone cells and playing a role of female hormone.7,8 Daidzein has been a medi-cine and used to treat coronary heart disease, hyperten-sion, cerebral block, cerebral hemorrhage sequela and cerebral thrombosis.9 However, because the solubility of daidzein is poor, its biological utilizat…     

Kinetics of the First Order Autocatalytic Decomposition Reaction of Nitrocellulose （13.86% N）

The kinetics of the first order autocatalytic decomposition reaction of nitrocellulose (NC, 13.86% N) was studied by using DSC. The results show that the DSC curve for the initial 50% of conversion degree of NC can be de scribed by the first order autocatalytic equation dy/dt =-10^16.3 exp (-181860/RT)y-10^16.7ex(-173050/RT)y(1-y) and that for the latter 50% conversion degree of NC described by the reaction equations dy/dt=-10^16.4exp(-154820/RT)y (n=1) and dy/dt=-10^16.9 exp(-155270/RT) y^2.80(n≠1).     

Study on the Phase Equilibrium of the Ternary System Ethanol-Cesium Carbonate-Water at 10, 30 and 50℃

Introduction The salting out effect in the systems of aliphatic al-cohol-water is of industrial interest. The addition of or-ganic solvents to the aqueous solution of a salt normally decreases the solubility of the salt. So the method can be used for salting-out of inorganic salts to improve yield and purity.1-3 However, the phase diagrams of the inves-tigated systems are required as basic data. There are lots of aliphatic alcohol-water systems having been deter-mined. The 1-butanol-water-Na…     

Thermokinetic Study on the Complexation Reaction of the First-Row Transitional Metal Chlorides with Histidine

Introduction The first-row transitional metals of chromium, man-ganese, iron, cobalt, nickel and copper are essential trace elements to human body, which are connected with hundreds of metalloproteins and metalloenzymes, participating in ferment syntheses and playing an im-portant role in metabolism of nucleic acid, protein, carbohydrate and fat. L--histidine is one of the basic units of proteins and absorbed from food because of not being synthesized in human body. Therefore, it is of practic…     

Kinetic Study on the Exothermic First-stage Decomposition Reaction of 2,4,8,10-Tetranitro-2,4,8,10-tetraaza- spiro[5,5]undecane-3,9-dione

Introduction 2,4,8,10-Tetranitro-2,4,8,10-tetraazaspiro[5,5]udecane- 3,9-dione is a typical cyclourea nitramine (Figure 1). Its crystal density is 1.91 gcm-3. The detonation velocity according to =1.90 gcm-3 is about 8670 ms-1. Its sensitivity to impact is better than that of cyclotrimethy- lenetrinitramine. So it is the potential high explosive. Its preparation,1-3 properties,1-3 hydrolytic behavior4 and electronic structure3 have been reported. In the present work, we report its kinetic pa…     

Thermochemical Properties and Non-isothermal Decomposition Reaction Kinetics of N-Guanylurea Dinitramide （GUDN）

Introduction N-Guanylurea dinitramide (GUDN) is a new ener-getic oxidizer with higher energy and lower sensitivity. Its crystal density is 1.755 g·cm-3. The detonation velocity is about 8210 m·s-1. Its specific impulse and pressure exponent are 213.1 s and 0.73, respectively. It has the potential for possible use as an energy ingredient of propellants and explosives from the point of view of the above-mentioned high performance. Its preparation,1 properties2 and hygroscopocity2 have been …     

Study on the thermal decomposition kinetics of cis/trans-[Cu(gly)_2]·H_2O

The thermal decomposition reactions of the complexes cis/trans-[Cu(gly)2]·H2O were studied by TG-DSC methods. The results showed that they have similar decomposition process, which occur in two steps. The first step is the loss of water and the second step is the decomposition of anhydrous complexes. But for cis-[Cu(gly)2]·H2O, the temperature of losing water is higher than that of trans-isomer. Their reaction mechanisms of the two-step decomposition were also proposed.     

反相HPLC测定食物中的有机酸

本文研究了反相HPLC同时测定食物中草酸、酒石酸、苹果酸、乳酸、乙酸、柠檬酸和琥珀酸的条件,提出了用C_(18)固定相、2.5%NH_4H_2PO_4(pH2.50)溶液的流动相和在200nm下紫外检测这七种有机酸的测定方法。该法简便快速、具有较高的准确度和精密度。另外,还对有机酸的分离机理作了探讨。对十种食物中的有机酸进行了定量测定。     

Thermal Decomposition Kinetics of Triethylene Glycol Dinitrate

Introduction Triethylene glycol dinitrate (TEGDN) is a novel en-ergetic material containing two groups of NO2, which can be used as an energetic plasticizer ingredient in propellants because of its excellent proformance.1 It exhibits lower impact sensitivity, better thermostability, weaker poisonousness and volatility, and stronger effec-tiveness of plasticizing cellulose nitrate than nitroglyc-erine (NG). As a new plasticizer TEGDN has good ap-plication prospects in the near future. The…