Editor in chief：朱立光
International standard number：ISSN 1008-1542
Unified domestic issue：CN 13-1225/TS
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2007, 28(2):87-89. DOI: 10.7535/hbkd.2007yx02001
Abstract:The development of the textile industry during the 10th "5-year plan" is reviewed. The textile industry of China will witness an obvious increase during the 11th "5-year plan". The force ought to be placed on strengthening the self-reliant creation and innovation, speeding up the regulation of construction of textile industry, transferring the growing-up mode, advancing technical progress, optimizing structure of production,and working toward the mode that values quality and profits.
2007, 28(2):90-96,102. DOI: 10.7535/hbkd.2007yx02002
Abstract:We discuss the following BVP y(2m)(t)=f(t,y(t),y′(t),…,y(2m-2)(t),y(2m-1)(t)),t∈(0,1), y(2i+1)(0)=y(2i)(1)=0, 0≤i≤m-1,where(-1)mf:[0,1]×R2m→[0,∞) is continuous.The associated Green''s function for the above problem and some of its properties are given.Growth conditions are imposed on f which ensure the existence of positives.By using the 5functionals fixed point theorem,the existence of at least 3positive solutions for the the boundary value problem is given.
2007, 28(2):97-99,102. DOI: 10.7535/hbkd.2007yx02003
Abstract:The boundary value problem [q(t)xΔ(t)]Δ+λf(t,xσ(t))=0,t∈[a,σ(b)]∩T,αx(a)-βxΔ(a)=0,γx(σ(b))+δxΔ(σ(b))=0 on the measure chain T is studied,where f:[a,σ(b)]×[0,∞)→[0,∞) is continuous.By using krasnoselskii fixed point theorem on cone,some conditions are imposed on f which ensure the existence of positive solution of the boundary value problem at the interval of λ.The results are extended from xΔΔ(t)+λf(t,xσ(t))=0to [q(t)xΔ(t)]Δ+λf(t,xσ(t))=0,where q(t) is bounded and positive for t∈[a,σ(b)].
2007, 28(2):100-102. DOI: 10.7535/hbkd.2007yx02004
Abstract:Supposing the nonlinear term bounded,by using homotopy invariance theorem,we proved the existence of solutions of boundary value problems for a class of nonlinear ordinary differential equations.When the value of nonlinear term is naught,the conditions of boundary value will guarantee an unique zero solution existing for the corresponding problem.There for the conditions of boundary value may be special,but the forms vary.Furthermore,the method is also available to some high-order boundary value problems.
2007, 28(2):103-107,119. DOI: 10.7535/hbkd.2007yx02005
Abstract:We apply Wegner''s flow equation method to study the eigenvalue of two-level atom system acted by light field. Interactions not contained in the original Hamiltonian are generated by this unitary transformation. With an average field approximation, we can close the flow equations. In the flow parameter l→∞ limit with Hamiltonian H(l), the interaction terms vanish and noninteraction terms approach fixed values. In the end, we obtain an explicit expression of the spin atom autocorrelation function.
2007, 28(2):108-109,119. DOI: 10.7535/hbkd.2007yx02006
Abstract:It is founded that the permeate flux of MF is 200～350L·h-1·m-2.The GH4040organic ultrafiltration membrane is used to concentrate the permeate of MF.The results indicate that the permeate flux of UF is 13.02L·h-1·m-2 at 37℃,1.5MPa and the rejection of puerarin is 87%.It can be concluded that it is promising to concentrate puerarin by membrane separation technology.
2007, 28(2):110-113. DOI: 10.7535/hbkd.2007yx02007
Abstract:Maleic anhydride reacts with polyethylene(PE-g-MAH)and FTIR spectra proves maleic anhydride is grafted to polyethylene. Aluminium trihydroxide(ATH) treated with the PE-g-MAH is melt and blended with polyethylene. The rheological property, mechanical properties, fire retardance and morphology of PE/ATH composites are investigated. The data indicates that the rheological and the mechanical properties are improved while ATH is treated with PE-g-MAH of the right dosage. However, the LOI is hardly changed.It is found that better dispersion is achieved when ATH is treated with PE-g-MAH under SEM.
2007, 28(2):114-119. DOI: 10.7535/hbkd.2007yx02008
Abstract:Choosing the main components of a liquid detergent:surfactants is a key factor in confecting liquid detergent.Inview of that affect washing,the author puts forward several current principles in chooing the main components of a liquid detergent, and summarizes methods of choosing emulsification agent,a key factor that influeuces washing,and its working condifions are also given.Main components which have been chosen must be optimized to test the synergism. At last, practical and specific surfactants are obtained.
2007, 28(2):120-122. DOI: 10.7535/hbkd.2007yx02009
Abstract:Benzidine is an important dye intermediate, but its carcinogenicity has been confirmed. In this article, a non-carcinogenic dye intermediate 4-aminodianiline-2-sulfonic acid is synthesized from 4-nitro-1-chlorobenzen through sulfonation, condensation and reduction.It can be used to replace benzidine. The molecular structure of the product is characterized by FT-IR,DSC and 1[KG-*4]HNMR.
2007, 28(2):123-125. DOI: 10.7535/hbkd.2007yx02010
Abstract:This paper introduces some montmorillonite of different production technologies.Montmorillonite and pillared agents are used to synthesize the pillared montmorillonite. The pillared montmorillonite was identified by BET,IR and XDR.The result shows of pillared montmorillonite that compared with the original montmorillonite, its specific surface area and basal interlayer space are greatly increased,but its content of carbon is greatly reduced.
2007, 28(2):126-129. DOI: 10.7535/hbkd.2007yx02011
Abstract:The normal determining method of potassium persulfate digestion with colorimetric tubes of 50mL takes long time and consumes excessive experimental reagents,and the auther proposed to use 25mL tubes.Through comparing the vacancy,the related coefficient, the rates of recovery and reproducibility of the new method with those of normal methods,we conclude that y=1.5173x+1.20×10-3,the related coefficient is 0.9998,reproducibility is between 98.4% and 104.1%,which show no apparent differents. The new method has the advantages of high speed, good precision, low experimental cost,and low second pollution.
2007, 28(2):130-133. DOI: 10.7535/hbkd.2007yx02012
Abstract:This paper introduces the contrast coagulation experiment of different coagulation conditions of Wuhu Shangxintang civil waste water, the interaction of the flocculation effect factors is discussed.The result shows that the interaction of the flocculation factors to turbid remove exists certain synergistic effect.When tested at 20℃,pH= 7.5～8.4,PAC-PAM co-use disposal of waste water, the total reagent to be added is 80mg for every liter waste water, and the optimized weight proportion of reagent component is V(PAC)∶V(PAM)=8∶2,the turbid remove efficient being 93.18%.
2007, 28(2):134-137,146. DOI: 10.7535/hbkd.2007yx02013
Abstract:The electricity principle of the hardware system,design method of its electric circuit and parameters selection are explained. The digital model that tests resistance parameters and running adaption is established,the overall structure of the testing software and the data processing method are given,and the major applied programme is designed.
2007, 28(2):138-141,146. DOI: 10.7535/hbkd.2007yx02014
Abstract:We put forward the concept of virtual diagnosis (self-detection) based on the very characteristics of the electronic instrument. It needs no special diagnosing circuits or interfaces, only working with the programs preset in a microcomputer which will realize self-diagnosis for various channels in process, sensors and also actuators. This technique is proved in real production to be very convenient, economical, reliable, and thus practical.
2007, 28(2):142-146. DOI: 10.7535/hbkd.2007yx02015
Abstract:A signal processing system of EW digital receiver is introduced.It is based on FFT/IFFT algorithm,and realized completely by FPGA and constructed annularly.The four FPGAs in the system implement respectively high-speed data transmission interface, FFT/IFFT operation and signal detection in time/frequency domain. The system can do 1~1024K points FFT operation, 1~64K points IFFT operation and can detect the parameters of pulse description word for 4simultaneous-arrival signals at most. The FPGAs in the system run with distributed, multi-bus, parallel and pipeline mode and they need only about 20ms to detect 4signals while 256K-point FFT and 32K-point IFFT are adopted.
2007, 28(2):147-149. DOI: 10.7535/hbkd.2007yx02016
Abstract:An on-line diagnosis method of transformer hot fault is given based on infrared thermal imaging technology. Using real-time thermal imaging of transformer surface, the temperature distribution field is built. A heat-transfer model is established in accordance with some parameters, such as surface temperature, internal structure parameters, physical characteristics and environmental temperature of the transformer. And then the internal hot fault temperature of transformer is calculated through the model. By comparing it with DGA diagnosis result, the feasibility of the diagnosis method is proved. And then the on-line and non-contact diagnosis of transformer latent hot fault is realized.
2007, 28(2):150-153. DOI: 10.7535/hbkd.2007yx02017
Abstract:The analysis on all thermal resistances in a sort of chip radiator with heat pipe is made through the method of electro-thermal simulation.The electric heat transfer model is established of the heat pipe chip radiator under forced air cooled condition, and the formula of its total heat-transfer ability is worked out. Then, a certain kind of designed instance is simulated by ICEPAK software,and the simulated result corresponds to the theoretical computational result basically,and so the validity of the electric heat transfer model is verified.
2007, 28(2):154-156. DOI: 10.7535/hbkd.2007yx02018
Abstract:In accordance with the sophistication of the B/S structure and the maturity of C/S structure,and through the comparison of the merits and shortcomings of B/S structure and C/S structure,a new hybrid application stucture based on C/S and B/S is put forward. It realizes the long range control, information sharing and the tight and valid data management.
2007, 28(2):157-161. DOI: 10.7535/hbkd.2007yx02019
Abstract:OpenSSL is an open source toolkit used to develop the network security software. By using this software package we can speed development cycles and improve operational efficiency and stability of the softwares. But at present, most softwares based on OpenSSL can not bring out to full play the features of high efficiency and high stability. This lies in the fact that developers know very little about the advanced programming methods of OpenSSL.This paper elaborates on the senior application of OpenSSL so as to improve the softwares'' operational efficiency and stability, and brings forward two ways to resolve these problems.
2007, 28(2):162-164,168. DOI: 10.7535/hbkd.2007yx02020
Abstract:When enterprises invest in a project,they often face the irreversability,the redound uncertainty,the leverage effect and delay effect of the investment. However, it is often frustrated by dogmatic reliance on traditional approaches to financial evaluation.We mainly analyzed the shortcomings and the risk-bias of the managers when the traditional methods are used, and then used the real-options to evaluate the feasibility of the investment.At last,we combined the two methods and created a new method which is the matrix method to evaluate the feasibility of the investment.
2007, 28(2):165-168. DOI: 10.7535/hbkd.2007yx02021
Abstract:On the condition that the scale of industry remains unchanged, sunk cost would be one of the factors that hedge the potential firms from entering into the industry. This article uses theory and examples to explain that the low sunk cost firms have lower industry sunk cost and higher social wealth, so low sunk cost firms can drive away the high sunk cost firms.