摘要:In this paper, Various mathematical methods are listed, a united metho —— MMmethod is obtained by analyses the construction of every mathematical method. Finally, the significance of discussing the unity of mathematical method is pointed out.
关键词:Mathematical method;The unity of mathematical methods;MM method
摘要:In this paper, the relative projective cover is defined, perfect and semiperfect rings are described by the relative projective cover, and eguivalent conditions of the generator of semiperfect ring are discussed.
摘要:Using the perturbation theory and the variational method, we calculate the energy levels of anharmonic oscillator in strong potenital field; the accuracy rating of the ground state level is about 2 % .
摘要:In this paper, we have researched condition of preparation in laboratory of water soluble intumescent fire - retardant coating. These base stock and fire - retardant system are liquid organic compound. The coat has better fire- retardant and transparency.
摘要:Based on the catalytic effect of silver on the chromatic reaction of K4Fe(CN)6 and O - phen, a new spectrophotometric method for determining trace silver has been developed. The method, which has sensitivity of 1.0 × 10 -3μg/mL and linear range of 0 - 4μg/25mL, was used for determination of trace silver in water samples.
关键词:Determination of silver(I);Catalysis Spectrophotometric method;O- phen;K4Fe(CN)6
摘要:This paper studies a calculating method for the maximum production capacity of intermittent filter, and determines the optimum time that should be adopted in each stage in an operating period according to the maximum production capacity. It has an important meaning to raising the production capacity of filter’in industry.
摘要:General, market sell scouring agent are general only suit ordinary purge. In this paper, introduces how about different equipment and different dirt proportioning special cleaning a-gent, and different method of clear.
关键词:Chemical industry equipment;Cleaing agent;Purge
摘要:The super - reinforcement centrifugal mechanism introduced in this paper is new created kind of mechanism. Comparision with conventional centrifugal mechanism, its main mechanical characteristics is that it has two kinds of centrifugal weight with different functions, i.e. output weight and reinforcement weight. The actual output force of output weight is the resultant of centrifugal force formed by output weight and the force by reinforcement weight and amplified by step- up system. Brief introduction and analysis to several kinds of conventioanl centrifugal mechanism were shown in this paper. On the base of research on its structure and mechanics, the prospects for the application of Super - reinforcement centrifugal mechanism were pointed out.
关键词:Centrifugal force;Centrifugal weight;Reinforcement weight;Super-step - up system;Centrifugal clutch;Centrifugal fixture
摘要:This document describes an automatic process planning system for users. The system collects the knowledge by the different levels and classes. It expresses the knowledge by the If- then rules and AND/OR tree structures. The process planning is antomatically generated by the rule correspondence and the depth priority. This system sets up not only inter knowledge -bank but also outer one. The outer knowledge - bank may be changed and enlarged according to the requirement of the users. So, the system may be used in different environment. It has a better flexibility.
摘要:Based on Weibull theory, statistical characteristics of the flexural strength and tool life till fracture of advanced ceramic cutting tools are studied experimently. Relationship between Weibull modulus of the flexural strength and tool reliablity are analysed , from which it is verified that Weibull modulus of the flexural strength can be regarded as an index of evaluation for the reliability of ceramic cutting tools.
摘要:A trouble - locating device for AC/DC circuit is used when detected equipment no power-supply, was introduced in this paper. Its function principle and operating method were analyzed in detail also.
摘要:In this paper, we discuss the factors which affect the elastic modulus of concrete and explain the relationship between the compressive strength and the elastic modulus of concrete.
关键词:Elastic modulus of concrete;Compressive strength;Aggregate;Cement paste matrix;Transition zone;Testing parameter