Editor in chief：朱立光
International standard number：ISSN 1008-1542
Unified domestic issue：CN 13-1225/TS
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2008, 29(4):265-268. DOI: 10.7535/hbkd.2008yx04001
Abstract:Using two models of wind accretion, we calculate the relations between surface carbon abumdance [C/H] of secondary stars and the orbical periods for CEMP stars and CH stars,and calculate the relations of contamination factor R with orbital periods ,and estimate variation of binary separation vs. mass of secondary. Two models of wind accretion are compared.
2008, 29(4):269-274. DOI: 10.7535/hbkd.2008yx04002
Abstract:In the process of public opinion spreading, the attitudes of people are changed randomly due to some uncertain factors that can disturb and distort the information dissemination contents. Therefore, it is proposed to improve and modify the previous Sznajd Model by introducing some new rules of evolution. The attractor of the final state does not appear any more in the modified model and the problem is approximately discussed with the mean-field theory.
2008, 29(4):275-278. DOI: 10.7535/hbkd.2008yx04003
Abstract:Based on electro-optic effects curve of LCD and Freedericksz''s phase transition theory,the relation between coefficient of viscosity and response time of LCD,was analyzed. A function expression of driving voltage and rise time was obtained by reverse educing method, the response time and threshold voltage were tested by experiment,and the result showed that the theory agree with the experimental facts.
2008, 29(4):279-282,291. DOI: 10.7535/hbkd.2008yx04004
Abstract:The enantioseparation of six triazole chiral pesticides including triadimefon, diniconazole, myclobutanil, flutriafol, paclobutrazol and bitertanol were studied on Chiralcel OD-H and Chiralcel OJ-H chiral columns in the normal-phase HPLC mode. The resolution conditions were optimized on the two chiral columns. The effect of polarity of mobeil phase on separation was discussed. Resolution results of different cellulose chiral stationary phases and chiral recognition mechanism were further evaluated.
2008, 29(4):283-285. DOI: 10.7535/hbkd.2008yx04005
Abstract:The kinetics of conformational transition in the interaction of Ni ion with bovine serum albumin (BSA) was studied using UV-Visible spectrometry and optical rotation measurement. The results showed that the interaction between BSA and Ni ion comprised of two consecutive reactions. The first reaction was a fast coordination reaction between Ni ion and BSA; the second reaction was the conformational transition of BSA induced by Ni ion. The process was not a simple first order reaction reported by previous papers but an opposite reaction, which comprised of a forward first order reaction and reversible first order reaction.
2008, 29(4):286-288,298. DOI: 10.7535/hbkd.2008yx04006
Abstract:In order to solve stochastic scheduling problems in polynomial time, we studied a class of single machine stochastic scheduling problems 1|pj~exp(λj)|E(wjDj) . It is proved that because of the specific property of exponential distribution, the problems have polynomial optimal algorithms in both nonpreemptive and preemptive situation. Its optimal algorithm is WSEPT rule.
2008, 29(4):289-291. DOI: 10.7535/hbkd.2008yx04007
Abstract:This article studies one algorithm for the multi-objective two plans, and gives one new solution to two multi-objective decision making question''s mathematical model, in which the linear weighted sum law, the ideal point law and the condition are unified, and two multi-objective programming question is transformed into the single-layer simple target plan question, thas causing the question simplification and the original question effective solution.
2008, 29(4):292-294. DOI: 10.7535/hbkd.2008yx04008
Abstract:A system subject to two risks in a competing risks model is considered.Given the failure of system has occurred at or before x,we introduce the cause reversed failure rate to analyze the probability of a failure in (x-dx,x] and the cause of failure will be the i-th.We give the necessary and sufficient conditions for the independence of system life time and the cause of failure based on caused reversed failure rate.Finally,we study the property of the survival function of inactivity time at time x for the system corresponding to i-th cause of failure.
2008, 29(4):295-298. DOI: 10.7535/hbkd.2008yx04009
Abstract:For the nonlinearity of neural network with same activation functions in all the hidden nodes is limited, this paper presents a fuzzy-tuned neural network, which is trained by genetic algorithm (GA). The fuzzy-tuned neural network consists of a neural-fuzzy network and a feed-forward neural network. The neural-fuzzy network modifies some of the parameters of the three-layer feed-forward neuron network. All the connecting weighting coefficients and some parameters of the fuzzy-tuned neural network are trained by GA, thus increasing nonlinearity of the network. Simulation shows that the proposed fuzzy-tuned neural network can increase the degree of freedom of the network function.
2008, 29(4):299-304. DOI: 10.7535/hbkd.2008yx04010
Abstract:Based on the developed rehabilitation manipulator, study on the control system is carried out, such as embedded system platform with the ARM microprocessor S3C2410as its core, motor control module and data acquisition module based on serial peripheral interface (SPI) bus, control software and graphical user interfaces (GUI) etc. According to the mechanical system, a sensor system is also designed to realize the function of acquisition of rehabilitation dada during rehabilitation motion. The test proves the feasibility of the system which can be used in clinic in future.
2008, 29(4):305-307,312. DOI: 10.7535/hbkd.2008yx04011
Abstract:The paper analyses the advantages and disadvantages of the existing streaming media congestion control algorithm(AIMD,TFRC).On the basis of this, it proposes an improved streaming media congestion control algorithm. This algorithm predicts the feedback information and adjusts the parameters to reduce the delay time of the initial stage. And it uses a steady growth factor to lower the process of transmission jitter, to reduce packet loss rate, and to enhance the smooth flow of the streaming media. Finally, the algorithm is verified. The simulation result shows that the improved algorithm improved in jitter delay, which makes it more suitable for streaming media transmission while maintaining the TCP-friendly features.
2008, 29(4):308-312. DOI: 10.7535/hbkd.2008yx04012
Abstract:Some kinds of failure resulted from abnormal wear under rigorous working conditions were summarized. Its wear volume is direct ratio to hardness of friction pairs. Relative movement between retainer and rings of the mainshaft bearing of turbojet engine and the mechanical performance of their material were analyzed. The friction pairs operate at the coupling action of high-frequency impact and high-speed sliding. The hardness of rings is higher and its plasticity is worse, which causes microcrack easily. And chemistry of lube can be reinforced to material at high-temperature. The synthetical action results in abnormal wear.
2008, 29(4):313-316,324. DOI: 10.7535/hbkd.2008yx04013
Abstract:This paper simulates a thermal environment in a passenger cabin with CFD. In the simulation, the SIMPLE algorithm and k-ε turbulence model are used, the natural convection is taken into consideration and the body-fitted coordinate is applied. This paper also investigates the effect of component radiation in the cabin. The results indicate that for most regions where the air velocity is low, component radiation plays an important role and can not be ignored. The results also show that the configuration of vents has a significant influence not only on the velocity and temperature levels but also on the overall flow topology.
2008, 29(4):317-319. DOI: 10.7535/hbkd.2008yx04014
Abstract:Sodium diacetate was synthesized from sodium acetate trihydrate and acetic acid without any solvent. The effects of the component ratio, reaction temperature, time and water content on the product yield and quality have been discussed and the optimum technological conditions have been obtained. The optimum conditions by orthogonal design were determined as follows:the ratio of acetic acid to sodium acetate trihydrate 1.1∶1(molar), reaction time 30min,water content 10%.The product quality was up to FAO standard and the yield over 96%.
2008, 29(4):320-324. DOI: 10.7535/hbkd.2008yx04015
Abstract:The infrared spectrum, 1D and 2D NMR (1H NMR, 13C NMR, DEPT,1H-1H COSY, HSQC and HMBC) spectra of tamsulosin hydrochloride were reported and interpreted. All the NMR signals were assigned. The infrared spectrum was analyzed to derive the types of vibration of the functional groups. The structure of tamsulosin hydrochloride was elucidated.
2008, 29(4):325-327. DOI: 10.7535/hbkd.2008yx04016
Abstract:We have synthesized L-prolinamide with the material of L-proline. After steaming out all the solvent, the L-proline methyl ester hydrochloride was direct for the next reaction.This method avoids the crystallization difficulty caused by moisture. The process of drying the methanol was reduced by using the AR methanol instead of the anhydrous methanol to synthesis L-proline methyl ester hydrochloride. The optimum conditions were found:reacting at less than -10℃, 0.5h , rt,9h with n(L-proline)∶n(SOCl2)=1∶1.1, for ammoniation at normal pressure and 0℃,24h. The total yield of L-prolinamide was 94.1%, and the optical purity was up to 98.0%.
2008, 29(4):328-331. DOI: 10.7535/hbkd.2008yx04017
Abstract:In this paper, we did a research on optimization for synthesis of racemic atomoxetine which is a very important intermediate for the synthesis of atomoxetine hydrochloride. It was synthesized using 3-methylamino-1-phenylpropanol as the starting material via such three steps as etherification, purification and salt formation. Optimum reaction conditions were obtained while the effects of raw materials molar ratio, reaction temperature and phase transfer catalyst on the reaction were studied in etherification,and the influence of purification methods and salt formation was investigated.Atomoxetine hydrochloride was prepared by reaction of 3-methylamino-1-phenylpropanol with 1-fluoro-2-methylbenzene in DMSO/KOH and salt formation, with the total yield of 68.1％, and purity of 99.5％.
2008, 29(4):332-335. DOI: 10.7535/hbkd.2008yx04018
Abstract:A new type of high effective complex coagulant polysilicate aluminum ferric (PSAF) was prepared from fly ash and pyrite slag. The results showed that PSAF had a good coagulation effect in the pre-treatment of abermectin wastewater. The optimum conditions were that the pH value of influent was 6.5～7.5, the dosage of PSAF was 80mg/L, the concentration of COD,SS and ρ(AVM)''s removal rate reached 18.9%,34.6% and 20.5%, respectively. The effluent BOD5/COD of abermectin wastewater was increased from 0.31to 0.42, and the biodegradability was improved a lot.
2008, 29(4):336-340,352. DOI: 10.7535/hbkd.2008yx04019
Abstract:The strategic decision-making is very important to the multinational corporations (MNCs), especially when they are facing the intense competition in China nowadays. This paper focuses on six elements of management instruments, information, organizational communication, psychological anticipation, ethics and intuition, and proves their marked influences on the quality, speed and cost of MNCs'' strategic decision-making.
2008, 29(4):341-346. DOI: 10.7535/hbkd.2008yx04020
Abstract:In view of the fact that present evaluation methods such as AHP(the analytic hierarchy process) are vulnerable to the impact of subjective views and that fuzzy comprehensive evaluation''s membership selection tends to be subjective and arbitrary, a evaluation method based on particle filter algorithm is proposed. This method, based on the principle of particle filter, selects optimal value as a Gaussian random variable and uses particle filter iterative to strike a unit''s success probability density under a indicator.This method resolves the problem that other methods cannot resolve, the unability accurately and objectively reflect all tenders'' real gap under various indicators.This method makes evaluation get improvement in rationality and fairness. The effectiveness of the algorithm is shown by one bidding case’, whose computing and analysing indicates that the algorithm can be extended to other similar problems in the evaluation as well.
2008, 29(4):347-352. DOI: 10.7535/hbkd.2008yx04021
Abstract:This paper firstly analyses “the shortage of city-bound rural worker” on the base of the theory of Masluo demand level, then comes to the conclusion that “love and esteem demand” and “self-fulfillment demand” are more stimulant after “physiology demand” and “safety demand” have been satisfied primarily. At last advices about cultivating, educating and training are given.