最新刊期
      卷 34 ， 期 1 ， 1995
      • Chen Yunfeng
        Vol. 34, Issue 1, Pages: 1-5(1995)
        摘要：In this paper we discuss the attainable domain of a class of semilinear systemsby using the theory for generalized inverses of the linear operators and Sadovskii fixedpoint theorem,Some attainability practical criterions and analytic expressions of the at-tainable domain are derived.  
          
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      • Zhao Zhihui,Liu Mingyang
        Vol. 34, Issue 1, Pages: 6-12(1995)
        摘要：The existing conditions of finite-dimensional inertial manifold of nonlinearparabolic distributed parameter systems are presented in this paper.The sliding equa-tion obtained in this paper is employed in the discussion of inertial manifold and the con-ditions to be global stable for the system,Finally,the control problem for parabolic dis-tributed parameter systems of heat process is studied.  
          
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      • Vol. 34, Issue 1, Pages: 13-17(1995)
        摘要：Numerical solutions of the problem for the two-dimensional steady flow through a uniform cascade of normal flat plates are studied by the domain decomposition methods An asytnptotic solution is employed for both upstream and downstream, Twomethods are presented for dealing with the singularity in the vorticity at the edges of theplates.Numerical solution has been obtained for Reynolds Numbers in the range of 0 to 30.  
        关键词：定常流动;垂直栅板;区域分裂   
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      • Huang Chengbiao,Xu Zhao
        Vol. 34, Issue 1, Pages: 18-23(1995)
        摘要：The processes of the generating,bifurcating and vanishing and the character-istics of the stability of the periodic vibrations follow in the variation of the parametersfor the strongly nonlinear autonomous vibration system with three parameters are stud-ied.And the approximate relationship between the amplitude and the parameters as wellas the curves of the amplitude-parameters, the bifurcations of the parameters,and thephase diagrams are given.  
          
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      • Zhang Xiuhua,Zhao Jian
        Vol. 34, Issue 1, Pages: 24-29(1995)
        摘要：In this paper the Gilmore’s equation for the fluid compressibility is employedas the mathematical model for bubble wall motion,and Gill’s method is also used tocompile the programs to solve initial value problems of nonlinear differential equations.A number of examples for harmonic or exponential pressure changing field show that thenoulinear oscillation is strong in a high pressure changing field ; the bubble wall oscillat-ing amplitude is concerned with varying amplitude, frequency and width of exponentialpulse of pressure field.  
        关键词：bubble;nonlinear oscillation   
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      • Vol. 34, Issue 1, Pages: 30-34(1995)
        摘要：Calculations based on the track theory of biological cells agree with measuredinactivation cross sections for V-79 Chinese hamster cells bombarded with very heavyions in the track width regime where thindown,a reduction in cross section with an in-crease in the LET of the bombarding particles,is displayed. The calculation uses cellu-lar radiosensitivity parameters evaluated earlier from the data of survival curves and anew numerical calculation of the radial distribution of dose from δ-rays.These resultsrepresent a significant improvement over an earlier calculation of the same endpoint,where a formulation of the radial dose distribution which neglected the angular distribu-tion of ejected δ rays was used.还原  
          
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      • Zhou Yichang,Zhu Shiliang,Zeng Zhushi
        Vol. 34, Issue 1, Pages: 35-40(1995)
        摘要：An effective Hamiltonian describing AC effect for electrons in electromagnetic field isderired and a factor of 1/2 over Anaronov-Casher Hamiltonian is obtained. Based on an exactsecond guantized Hamiltonian of non-interacting electron gas in the mesoscopic ring mixed withAB,AC effect,analytic solutions for energy eigenvalues, the persistent current and Dersistentspin curreut are obtained It is shown that AC effect is extremely important for electrons in somesemiconductors applied with intense electric field.  
        关键词：mesoscopic ring;AC effect;persistent current   
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      • Vol. 34, Issue 1, Pages: 41-45(1995)
        摘要：We propose a new intra-frame differential coding algorithm for speech waveform intime domain,This coding algorithm treats the waveforms in pre-proceeding as two-dimensionsignals.X-axis signal is the sequence number of samples in the same frame and Y-axis is thesequence number of frames,which performs the matching differential coding for the two sequentframes.Problems caused by intra-frame differential coding,such as frame matching,transitionframe proceeding and quantizer design,are discussed in detail.SNR test results for the somevowels of Mandarin Chinese is presented.The experiment shows that the short-time quantizationSNR of 4-bits intra-frame differentizal coding surpases 2 9 dB at 8kHz sampling rate. It isshown that there is a possibiliry to systhesis excellent speech with bit rate of 2 ～ 4kbps.  
        关键词：wavefom transformation;differential coding;intra-frame coding   
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      • Xie Cang,Zhang Yueli,Zhou Guiping
        Vol. 34, Issue 1, Pages: 46-51(1995)
        摘要：The Iinear electro-optic coefficients of KNSBN and SBN crystals at 1.32 μm havebeen measured for the first time,The dependence of the effective linear electro-optical coeffi-cient γ_c of the crystals on the temperature has been investigated and a lower driven voltage electro-optic modulator fabricated with SBN has also been described.  
          
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      • Wang Ruiqin,Chen Xiaoming,Zhang Jianhui,Chen Mingyong
        Vol. 34, Issue 1, Pages: 52-59(1995)
        摘要：The ESR spectra of vandyl Benzoxamate have been studied in a number of organic sol-vents and frozen glasses.The spectra have been analyzed in detail.The solvent effects on theESR spectra have been disscussed,From the anisotropic ESR spectral parameters obtained at-150℃,together with the d-d transition energies from electronic spectra,the molecular bondparameters α￣2,K,β￣2,γ￣2 have been calculated , effects of solvent on electronic structure ofVO（BHA）2also have been discussed.  
        关键词：ESR;vandyl complex;benzohydroxamic acid   
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      • Vol. 34, Issue 1, Pages: 60-64(1995)
        摘要：The rust-proof action of functional carbon fiber on circular cooling water system wasinvestigated firstly in this paper.The resul ts showed that the functional carbon fiber has good ef-fect on the rust-proof of pipes,heat exchangers and etc.in circular cooling water system, Atthe same time,the rust-proof mechanism was propoced that the functional carbon fiber can low-er down the electric potential in water and the concentration of oxygen dissolved in water. Theadsorption of functional carbon fiber for impure ions is also advantageous to resist the corrosion ofnew pipes network.  
          
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      • Vol. 34, Issue 1, Pages: 65-67(1995)
        摘要：Changiodendron, a new genus belonged to Ite aceae, is reported, the differenees be-tween the genus and Itea are made; Changiodendron guangxiensis Miau here newly describedfrom Guangxi Province.  
          
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      • Vol. 34, Issue 1, Pages: 68-75(1995)
        摘要：Comparative study of the population reproductivity of three fruit flies melon fruit flyBactrpcera cucurbotae, oriental fruit fly B,dorsalis and pumpking fruit fly B. tau under differentphotoperiods(L:D= 16 :8～8:16)with constant temperature(25℃)and fluctuating relativehumidity(75%～95%)and under cyclical fluctuating temperatures , relative humidity and stablephotoperiods(20～25℃,L:D=4: 10,RH75%～95%125～32℃,75%～95%,L:D=10:14)were conducted.The results showed that middle and long photoperiods were favorable to the reproduction ofthree fruit flies.Short photoperionds were less favorable, By compared the population parame-ters,either under the circumstances of various photoperifor with constant temperature and fluctu-ating relative humidity or under cyclical fluetuating temperatures and relative humidity with con-stant photoperiod , all of three fruit flies had longer ovipositional period,large numbers of eggand overlapping generation. In the cyclical fluctuating condition of 20～25℃,50% Σlxm_x ofB. tau and B. dorsalis was distributed within 60 days after adult emergence, but 50% Σl_xm_x of B. cucurbitae was 130days;in 25～32℃,50%Σl_xm_x of B. tau and B. dorsalis was 40 days,B.cucurbitae’s was 70 days. The population density increase of both B. tau and B. dorsalis was morequiker than that of B. cucurbitae,B. dorsalis and B. tau are recognizied as more typical r-repro-ductive strategy than B. cucurbitae does.  
        关键词：Melon fruit fly Bactrocera cucurbitae;Pumpking fruit fly Bactrocera tau;Oriental fruitfly Bactrocera dorsalis;temperature;relative humidity;photoperiod;population reproductivity   
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      • Vol. 34, Issue 1, Pages: 76-81(1995)
        摘要：By using polyacrylamide gel e lectrophoresis,the changes in the relati ve activity ofmalate dehydrogenase(MDH)isozymes in the gill,liver,blood serum, heart,spleen,muscleand kidney of hemorrhagic grass carp were studied.It was shown all these tissues and organsand blood serum possess six kind of ribbons and the electrophoretogram of MDH isozymes in the healthy and diseased fish was different. The MDH isozymes activity apparently exhibited a tissue-specific expression. The total activity of the MDH isozyme of the diseased fish was considerably higher than that of the healthy in various tissues and organs.the activity of the isozyme s in the gill,liver,spleen and blood serum showed a conspicuous differently(p<0. 05).and theactivity order of the MDH isozymes showed more differently in the same tissue and drgan,Basedon the above results,it is considered that MDH isozyme electrophore togram of the tissues andorgans can be used as a physiological as well as pathological index of the hemorrhagic disease of grass carp.  
        关键词： grass carp;hemorrhagic disease;isozyme   
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      • Yang Pingzhang,He Haiyan
        Vol. 34, Issue 1, Pages: 82-89(1995)
        摘要：The tropical cyclone motion is seriously affecfed by its environmental synoptic system,Atropical cyclone is considered as a system that continuouslv exchanges its momentum with itsenvironment.The effect of nonlinear horizontal momentum advection on tropical cyclone motionis mainly analysed in this parer. The reason of abnormal changes of some tropical cyclone tracksis theoretically interpreted.  
          
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      • Quan Yarong,Liang Zhirong,Liu Yijun,Li Liejun
        Vol. 34, Issue 1, (1995)
        摘要：210)Pb is a daughter element of radioactive uranium series in nature,It can be used todetermine ages and depositional rates of sediments,in glacier,ocean.lake since one hundredyear.The basic principle and experimental procedure for￣(210)Pb dating method are explained.Thefive columned samples from the Haikou and Xinhai Bays have heen determined to have the depo-sitional rate of 0.38～1.04 cm/a.  
        关键词：210)Pb content;￣(210)Pb vertical distribution;depositional rate   
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      • Vol. 34, Issue 1, Pages: 96-101(1995)
        摘要：The weathering crust of late Yanshanian granite developed layered structures.Fromthe lower to the upper layer of the crust,the cot1tents of Clastic minerals and active components（K2223232  
        关键词：weathering crust granite;REE;metallogenic characteristics;existing states   
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      • Lin Guangming,Zhu Zhiying
        Vol. 34, Issue 1, Pages: 102-105(1995)
        摘要：Phase transition temperatares of A_s,and M_f are shown to decrease in Cu-Zn-Al shapememory alloys with increasing number of thermal cycles.The phase transition rate and transitionhysteresis are found to be insensative to the thermal cycles, Positrun lifetimes measarements sug-gest that the thermal cycling behaviour in closely related to vacancy agglomeratior1 is the shapememory materials.  
          
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      • Gong Di
        Vol. 34, Issue 1, Pages: 106-109(1995)
        摘要：The features of the solution of Maxwell’s equations with magnetic chargeand magnetic current are investigated. It is shown that transient transverse planeelectromagnetic waves are solutions of Maxwell’s equations provided the magnectic current exists.  
          
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      • Vol. 34, Issue 1, Pages: 110-113(1995)
        摘要：Three crystalline compounds were isolated from soft coral Cladiella densacollected off Xisha Islands,They were identified as hentriacontanol, batyl alcohol andgorgosterol by means of spectrometric methods. Hentriacontanol was firstly found inCladiella densa.  
          
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      • Chen Jian,Zhang Weihong,Zhang Zhuoliang,Hu Jiming,Xu Zhisan,Sheng Rongsheng
        Vol. 34, Issue 1, Pages: 114-117(1995)
        摘要：The NRS and SERS spectra of Crystal Violet have been described.Theelectronic absorption and SERS spectrum study of Crystal Violet show that resonanceenhancement come from the energy discrease of danging bonds.  
          
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      • Vol. 34, Issue 1, Pages: 118-121(1995)
        摘要：With methanol as solvent , the salnples were soaked,stirred and extracted atroom temperature,and then purified by liquid─liquid distribution of aqueous HClsolution-CHCl3.The contents of carbendazim in mulberry Leaves were determined byUV differential absorbance method using aqueous HCl（0. 3 mol/L）as reference. Therecovery was 90%～96%,and the linear range is 0～20 mg/L.  
          
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      • Vol. 34, Issue 1, Pages: 122-125(1995)
        摘要：The photofading behaviour of thiazine dyes in sensitized acrylamide systeminduced by He Ne laser has been investigated.It is found that the photofading reactionof dyes is related to the structure of dyes and amines,and the concentrations of dyes,amines and monomer,In different concentrations of reactants,the photofading reactionof methylene blue is conformed to the first order reaction,Relation of thepolymerization rate( R)to the photofading rate(Rf)is rather complex, In someconditions,they are in coincidence with the equation of R_p∝R￣1/2.  
          
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      • Huang Xuelin,Li Yanhong,Fu Jiarui
        Vol. 34, Issue 1, Pages: 126-129(1995)
        摘要：The fluorescent leakage from Brassicu alboglabra Bailey, B. chinensis Linn, and B.parachinensis bailey was identified by paper chromatography.The leakage was found to contain acampound,the R_f value and color reaction of which were similar to that of sinapine, The concen-tration of the sinapine determinated by using the specific absorbance of the compound at 388nmin basic solution(pH> 1 0)was closely associated with the seed vigor.Their relative coefficiencywere respectively-0. 92,-0. 81 and -0. 81.Thus,the seed vigor test in these species utilizingsinapine determination is practical,sensitive and better than method of observation of the fluores-cent leakage under UV light.  
        关键词： Brassica seed fluorescent leakage;seed vigor test   
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      • Jin Jianping,Lin Lu,Fu Jiarui
        Vol. 34, Issue 1, Pages: 130-132(1995)
        摘要：During 55～80 days after anthesis of Chinese Wampee,the fresh weight of seed increases continuously and the moisture content decreases gradually. When seeds get matured,the moisture percentage is as high as 49.6%,the ABA content of cotyledon or axis is only 22.4%or 11.7%of that during 55 days after anthesis.  
        关键词：development;moisture content;ABA content;Chinese Wampee seed;recalcitrant seed   
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