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Journal of Jishou University(Natural Sciences Edition) 2000 Vol.21 Please wait a minute... For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails Select A Study on the Biomass of the Young Plantation of Rhus chinensis and R. punjabensis LI Jing, LI Hu-Ming, CHEN Gong-Xi, SHI Jin-Xiao journal6    2000, 21 (1): 1-5.   Abstract （1753）      PDF（pc） （545KB）（1361）       Knowledge map    Save The biomass and its allocation of the young plantation of Rhus chinensis and R. punjabensis was determined with the average standard tree method. According to the data From 22 standard trees of different basal diameter classes, the following regression equations to estimate the biomass of each organs for Rhus chinensis and R. punjabensis were described from single plant : W= aDb, W= a( D2H )b. With signi ficant correlation coefficients 0. 970 0~ 0.998 2, small standard error 0.019 5~ 0.051 3, the equations had practical values. The results obtained showedthat the total biomass the gallaphid summer host plants stand in three- year old is 1 540. 6 g/m2, among which thebiomasses of tree layer , understory layer and litterfall are 1 291.0 g/ m2 , 157.0 g/ m2, 92. 6 g/m2 respectively. Thebiomass components ratio of each organ is trunk ( 50.7%) > leave ( 20.9% ) > root ( 14.9%) > branch ( 13.5%) . Reference | Related Articles | Metrics | Comments（0） Select Measurement of Nutriments N, P, K and their seasonal changes in Kiwifruit, Actinidia deliciosa cv. Miliang- 1 LIU Ying-Di, SHI Jin-Xiao, LI Jing journal6    2000, 21 (1): 6-10.   Abstract （2089）      PDF（pc） （522KB）（1444）       Knowledge map    Save The measurement of the nutriments, nitrogen, phosphorus, potassium and their seasonal changes in k-iwifruit, Actinidia deliciosa cv. Miliang-1, was carried in 1996 and 1997. The results showed that the average nitrogen content in root is higher than that in leaf and stem. But the phosphorus and potassium content in is higher than that in root and stem. The seasonal changes of these 3 nutriments content in plant, and relationship between nutriment content and soil nutriment supply are also discussed in this paper. Authors considered that the kiwi fruit tested herewas short of nitrogen and potassium supply, and phosphorus supply was sufficient on the whole. Reference | Related Articles | Metrics | Comments（0） Select Extraction and Determination of the Root Hlavone Compound of Xiangxi Rhododendron PENG Xiao-Chun, WANG Hui-Xian, LIU Wen-Ping, ZHANG Hui journal6    2000, 21 (1): 11-12.   Abstract （2219）      PDF（pc） （485KB）（1580）       Knowledge map    Save The hlavone compound of Xiangxi Rhododendron can be extracted from its root by ethanol leach, soxhled extraction, isolation and purification. The contents of the total flavonids and oneness were determined by spectrophotometry and PLC. It was shown that total flavonids is 0.189%~0.225% and rutionoside is 3.77~ 3.89  g/ml. Reference | Related Articles | Metrics | Comments（0） Select Preliminary Study for Numerical Prediction of Disastrous Disturbance Events in Solar-terrestrial Space——Six Step SolutionMethod for Interplanetary Shock Dynamics FENG Xue-Shang, WEI Feng-Si journal6    2000, 21 (1): 13-17.   Abstract （1762）            Knowledge map    Save The prediction of disastrous space weather is a hot topic among solar-terrestrial physics and high technological fields. We propose that the future forecasting of the physical conditions that the violent solar disturbance causes at the earth by propagating in solar wind depends heavily on the numerical method.This paper analyses the existing problems we are facing in the numerical prediction of disastrous disturbance events in solar-terrestrial space, and then gives some suggestions for future study. For such a purpose, a six step solution method is developed to deal with one-dimensional symmetric interplanetary shock dynamics. It should be point out that that initial ization of fully self-consistent 3-D MHD codes considering the solar-interplanetary- geomagnetic coupled relations with initial-boundary values at 1R of the global output of solar plasma and magnetic field using available solar observations is an essential requirement in space weather operational codes for forecasting purposes. Reference | Related Articles | Metrics | Comments（0） Select Phase Transition in Electrorheological Fluid ZHAO He-Ping, LI De-Jun journal6    2000, 21 (1): 18-21.   Abstract （2020）      PDF（pc） （738KB）（1398）       Knowledge map    Save Based on the point- dipole model, we have calculated the free energy of electrorheological fluid by using statitical method. The phase transition from liquid to solid is investigated by considering the osmotic pressure of particles in the suspension. Our results show that the osmotic pressure become negative when the applied field exceeds acritical value Ec and then the liquid experiences a phase transition to a solid phase. Reference | Related Articles | Metrics | Comments（0） Select On the Degrees of Irreducible Factors of Composite Polynomials LE Mao-Hua, LI Zhong journal6    2000, 21 (1): 22-24.   Abstract （2507）      PDF（pc） （686KB）（1443）       Knowledge map    Save Let F be a number field. Let g ( x ) and h( x ) be polynomials over F with the degrees m and n respectively. In this paper we prove that if g(x) is irreducible over F, then the degrees of irreducible factors of the composite olynomial g (h(x) ) over F do not less than m. Reference | Related Articles | Metrics | Comments（0） Select Stability of One-leg Methods of Nonlinear Multi-delays Differential Equations WANG Wen-Qiang, XIAO Fei-Yan, LI Shou-Fu journal6    2000, 21 (1): 25-29.   Abstract （2046）            Knowledge map    Save In this paper,we gave a sufficient condition of asymptotic stability for nonlinear multi-delays dif ferential equations , and then, we discuss the case of many delays which depends on the base of the part work in the thesis Huang [1] and gain some same results. Reference | Related Articles | Metrics | Comments（0） Select The Prime Powers in Sums of Squares of Two Consecutive Positive Integers LI Zhong journal6    2000, 21 (1): 30-31.   Abstract （2296）      PDF（pc） （255KB）（1540）       Knowledge map    Save Let x,n be positive integers, and let p be a prime. In this paper we prove that if p>109 and x2+(x+1)2= pn, then either n= 1 or n= 2. Reference | Related Articles | Metrics | Comments（0） Select On the Prime Divisors of Generalized Mersenne Numbers CHEN Rong-Ji journal6    2000, 21 (1): 32-33.   Abstract （2010）      PDF（pc） （347KB）（1355）       Knowledge map    Save Let p be an odd prime, and let a be a positive inte ger w th a> 1.Further let X ( a , p ) = ( ap- 1) / ( a - 1)and Y( a, p ) = ( ap+ 1) / ( a+ 1) . In this paper we prove that if  q= 2p+ 1 is a prime, then q is a prime divisor of X  ( a, p ) or Y( a, p ) according as ( a/ q) = 1 and q a- 1 or ( a / q) = - 1 and q a+ 1,where ( a/ q ) is the Legendre symbol. Reference | Related Articles | Metrics | Comments（0） Select A Genetic Programming Method in Brain Stem Auditory Evoked Potential Test BAI Dong-Ya, PENG Hong journal6    2000, 21 (1): 34-36.   Abstract （1789）      PDF（pc） （498KB）（1559）       Knowledge map    Save In this paper, the genetic programming method is proposed for brain stem auditory evoked potential test. Wecons truct the model for brain stem auditory evoked potential test. The experiment has shown the performance of the method that is better than that of tradition method. It can be applied to clinical processes. Reference | Related Articles | Metrics | Comments（0） Select Exact Solutions to Some Coupled Nonlinear Equations HU Jian-Lan journal6    2000, 21 (1): 37-40.   Abstract （2427）      PDF（pc） （733KB）（1388）       Knowledge map    Save In this paper , by direct algebraic method and suitable ansatz exact taveling wave solutions are given to some coupled nonlinear equations of physical interest, such as the coupled Zakharov-Kuznetsov and the coupled kadomtsev-Petviashili equations describing the interaction of long nonlinear waves in fluid flows. Reference | Related Articles | Metrics | Comments（0） Select Deformation of Particles Suspended in ER Fluids ZHOU Xiao-Qing, WU Yun-Wen, ZHAO He-Ping journal6    2000, 21 (1): 41-42.   Abstract （1808）      PDF（pc） （479KB）（1612）       Knowledge map    Save By using electrodynamics method, research has been into shape change and volume change of particles suspended in ER fluids by electric field and relative rate of change for the volume and shape is calculated, electrodilatancy effect is explained. Reference | Related Articles | Metrics | Comments（0） Select QSPR Study on Gas Chromatography Retention Index of Organic Compounds LUO Bei-Ping, PENG Xiao-Chun, REN Bi-Ye journal6    2000, 21 (1): 43-49.   Abstract （2345）            Knowledge map    Save A colored hydrogen- depleted graph was proposed to replace a molecular graph so as to obtain good discrimination of the complex organic compounds by dyeing both the edges and the vertices. Furthermore, the topological index Xu based on the adjacency matrix A and distance matrix D was derived and further adapted to the multiplybonds,heteroatom-containing compounds by using the related ratio of bond length to C-C bond length in place of the adjacent topological distance and the valence δi  in place of the degree of vertex vi. The index was highly correlated with the gas chromatography retention index of alkanes and cyclanes and alcohols and ketones and esters , and promised to be a useful parameter in the QSPR/ QSAR research. Reference | Related Articles | Metrics | Comments（0） Select Determination of Calcium and Magnesium in Mn3O4 by Flame Atomic Absorption Spectrography YAO Jun, MA Ming-You, CHEN Shang, XIAO Zhuo-Bing, QUAN Zhi-Zhong, LI Yu-Lin, ZHANG Yong-Kang journal6    2000, 21 (1): 50-51.   Abstract （2043）      PDF（pc） （618KB）（1701）       Knowledge map    Save The sample of Mn3O4 is digested with HCl, then Lasalt and Srsalt are added as release agents to offset 70 percent of influence of matrix Mn, the contents of calcium and magnesium are determined directively which achieve favorable result. This method proved to be convenient, rapid and exact. The recovery of method is 95. 8%~98. 7% , the relative standard deviation is 2.43%~ 3.28%. Reference | Related Articles | Metrics | Comments（0） Select Micro Mechanisms of Cell Cycle Regulation and Checkpoint Control LI Li, HUANG Heng-Yu journal6    2000, 21 (1): 52-55.   Abstract （2260）      PDF（pc） （685KB）（2124）       Knowledge map    Save The present paper study on cell cycle regulation in the course of cell proliferation in eukaryotic cell. The conclusion included the micro mechanisms of cell cycle regulation centres on cyclin- CDKs and the checkpoint control of functional factors on CKI, ATM, p53, Rb . In addition, exogenous signal also act on cell cycle in eukaryotic cell indirectly. Reference | Related Articles | Metrics | Comments（0） Select The Parameter Estimation About Reduplication Linear Model DUAN Yu journal6    2000, 21 (1): 56-57.   Abstract （2024）            Knowledge map    Save In the paper, least squares method is used to estimat the parameter about reduplication linear model. There by the liken and the forecasting precision of the model is enhance. Reference | Related Articles | Metrics | Comments（0） Select The Shape of the Least Energy Solution of Quasilinear Elliptic Equations ZENG Xian-Zhong, XIONG Zhi-Guang journal6    2000, 21 (1): 58-62.   Abstract （1945）            Knowledge map    Save This paper deals wi th the shape of the least energy solut ion of quasilinear el liptic equations involving criticale xponents- v pu = - Div( | Du|p- 2Du) = Q( x ) | u|p*- 2u+ E | u|R - 1u   x I 8 ,u| 98= 0,where 8 is a bounded domain in RNwith smooth boundary 98, 0< E< K 1, and Ey 0. Q( x ) I C( 8) , RI [ 1, p*) .The fol lowing conclusions are proved:The least energy solution uE of the equat ions satisfies ( after passing to a subse -quence) :| DuE |p   w  Q-N- ppm   SNpDx 0, as Ey 0, in the sense of measure.| uE |p*   w  Q-Npm   SNpD x0, as Ey 0, in the sense of measure.Where Qm= maxx I 8Q( x ) = Q( x 0) , D x 0 be the Dirac mass at x 0, S is the bes t Sobolev cons tant. Reference | Related Articles | Metrics | Comments（0） Select Design and Implementation of New Pattern System of Automatic Obtainning and Dealing with Network Information XIE Yi-Chen journal6    2000, 21 (1): 63-66.   Abstract （2101）      PDF（pc） （464KB）（1502）       Knowledge map    Save This paper introduces a design and implementation of new pattern system of automatic obtainning and dealing with newtork information. From the two ways of improving efficiency and saving network traffic, analyses this system's characteristic and used technology. Reference | Related Articles | Metrics | Comments（0） Select Characters of Measurable Field in Harmony π Spaces YU Xue-Jiang, YANG Hai-Tao journal6    2000, 21 (1): 67-68.   Abstract （1780）            Knowledge map    Save In this paper, two characters of measurable field of harmony π spaces are obtained. Reference | Related Articles | Metrics | Comments（0） Select Semi-open Sets and Semi-Continuity in Intuitionistic Fuzzy Special Topological Spaces YANG Xin-Mei journal6    2000, 21 (1): 69-72.   Abstract （2434）            Knowledge map    Save The notions of semi-open sets and semi-continuity in intuitionistic were introduced, their some properties were obtained: an intuitionistic fuzzy special set is an intuitionistic fuzzy special semi-open set if and only i f A  cl [ int ( A) ] , Ai : i∈I be an arbitrary family of IFSSOS's , then O is an I FSSOS, Let A  Y ~ X ~and A is an IFSSOS in(X , σ) , then A is an IFSSOS in ( Y, φ); Continucty implies semi-continuity but not conversely, Strongly semi-continuity implies semi-continuity but not conversely,The function f : X Y is semi-continuous  f and only if for f ( x ) O, O is an IFSSOS in Y there exis ts and IFSSOS A in X such that x ∈A and f ( A ) O,The function f : X→Y is strongly semi- continuous if and only if the preimage of each IFSSCS in Y IFSSCS in X . Reference | Related Articles | Metrics | Comments（0） Select Discuss for Experimental Conditions to  Fuse of  C10H8 WU Yun-Wen, ZHOU Xiao-Qing, XIAO Guang-Wen, ZENG Qing-Li, LIU Sheng-Chang journal6    2000, 21 (1): 73-77.   Abstract （1815）            Knowledge map    Save In this paper, by means of researches for experimental conditions to fuse of C10H8, obtain a better method of experiment, experimental results accord with theory. Reference | Related Articles | Metrics | Comments（0） Select Improve on Method of Separation and Synthesis of 4- Hydroxyphenyl- 21H, 23H- Porphine OUYang-Yu-Zhu , PENG Qing-Jing, ZOU Xiao-Yong journal6    2000, 21 (1): 78-81.   Abstract （2026）            Knowledge map    Save Method of separat ion of a hydroxyphenyl- 21H, 23H- porphine[ 5- ( 4- hydroxyphenyl) - 10, 15, 20-triphenyl- 21H, 23H- porphine( H2TPPOH) ] and many hydroxyphenyl- 21H, 23H- porphine[ 5, 10- di( 4- hydroxyphenyl) - 15, 20- diphenyl- 21H, 23H- porphine( H2TPP( OH) 2) ; 5- phenyl- 10, 15, 20- tri( 4- hydrox yphenyl) - 21H, 23H- porphine( H2TPP( OH) 3) ] was improved.The results showed that in the course of separating all kinds of hydroxyphenyl porphine, by the new method, the separate efficiency and product purity were better, the using amount of eluant was less and the column separation times was shorter. In addition, the influence of the ratio of reactants, drop speed of pyrrole solution and operational method on the yield of synthesing all kinds of hydroxyphenyl porphine were inves  tigated,wi th 3:1. 05:4( C6H4CHO: HOC6H4CHO:C4H5N, mole ratio) , drop pyrrole solution in 3 minutes and strong motor stir, the yield of the H2TPPOH was increased. Reference | Related Articles | Metrics | Comments（0） Select Extraction of Setcreasea Purpurea Pigment and Its Stability WU Zhu-Qing journal6    2000, 21 (1): 82-83.   Abstract （2255）      PDF（pc） （557KB）（1385）       Knowledge map    Save The extraction technology of natural pigment from Setcreasea Purpurea was studied in this paper. The physicochemical properties of the pigment were discussed. It is provided on some theoretical bases and technical data for the extraction and application of the pigment. Reference | Related Articles | Metrics | Comments（0） Select Advance in Research of Epimedium L. Ecophysiology SHI Jin-Xiao, LI Hu-Ming, LIU Ying-Di, CHEN Jun journal6    2000, 21 (1): 84-85.   Abstract （2095）      PDF（pc） （384KB）（1586）       Knowledge map    Save Here is a review of ecophysiological researches of Epimedium L . in this paper.The literature in last 10 years in this field is very poor.The achievements only include the differentiation in flavonoids contents andmorphological discrepancies of different species, or morphological discrepancies and different contents of the same species from di fferent producing areas and with dif ferent phenological characteristics , ect. The authors suggest that it is need to study physiology and ecophysiology of Epimedium L . , and to establish theoretical foundation for continually exploiting-utilizing and cultivating. Reference | Related Articles | Metrics | Comments（0） Select The Study on the Culture of Tulipa gesneriana in Xiangxi Area HUANG Heng-Yu, LI Li, LIU Guo-Chen, YANG Sheng-Hui journal6    2000, 21 (1): 86-88.   Abstract （2185）      PDF（pc） （373KB）（1551）       Knowledge map    Save The present paper through studying on introduced 4 variet ies of Tulipa gesneriana at E. R. I. of Jishou university, research some questions that will appear in the course of culturation and try to resolve them in Xiangxi area. Reference | Related Articles | Metrics | Comments（0） Select Sustainable Development in Ecological Forest LI De-Xiang journal6    2000, 21 (1): 89-91.   Abstract （1875）      PDF（pc） （312KB）（1349）       Knowledge map    Save Natural resources are the base of the forest and the motive force for the sustained growth of the forest. The coordinated growth among population, resources, enviroment and ecological forest serves our purpose harmoniously,which is an inexorable trend for our society's development. Reference | Related Articles | Metrics | Comments（0） Select The Clinical Significance of Abnormalities in NST Monitoring ZHANG Feng-Jin, CHENG Qiu-Rong journal6    2000, 21 (1): 92-94.   Abstract （2342）      PDF（pc） （292KB）（1646）       Knowledge map    Save To explore the clinical significance of NST ( non-stress test) monitoring in fetal heart rate.Method 60 cases of abnormal NST monitoring graphs indicating fetal distress were undergone cesarean section, and the abnormal finding during the operation. Result ( 1) Transient deceleration or scatlered deceleration was mainly seen in oligohydramnios( 55%, 30%) . ( 2) Transient acceleration was mainly due to corproblems ( 83.3% ) . ( 3) Low feasibility of the baseline, especially the flat types, was a demonstration of fetus oxygine lackage. ( 4) In the cases of combined pattern of deceleration and acceleration, prolapse of cord was suggested. Conclusion the abnormalities in fetal heart rate monitoring with non-stress test indicated high risk factors and close attention must be paid to these fetuses. Reference | Related Articles | Metrics | Comments（0） Select Surgical Treatment of Aged Carcinoma of Esophagus and Carcinoma of Cardia NIE Xiang-Yang, LI Qing, HUANG Yong, ZHOU Gui-Lin, GU Yue-Qi journal6    2000, 21 (1): 95-96.   Abstract （2256）      PDF（pc） （289KB）（1428）       Knowledge map    Save Aim: to review the surgical experience in treatment of aged carcinoma of esophagus and carcinoma of cardia. Clinical material and method: there were twelve aged patients who all as sociated multiple systems abnormal including respiratory system, cardiovascular system and malnutrition. 10 patients underwent tumour excision ( radical cure and conservat ive cure) , and 2 patients underwent ascertainment. Result: there were no operative deaths. The operation excision rate is 83.33% , and 3 partients had postoperative complications. Conclusion: senility is not the contraindication of operation. To aged patients, the treatment in perioperative is important and the disease of respiratory system and malnutrition should be improved before operation.And efficient management to airway and sustaining nutrition can reduce the postoperative compoications. So the postoperative evaluation to aged carcinoma of esophagus and carcinoma of cardia patients,we not only think much of the survival rate, but also the survival quality. Reference | Related Articles | Metrics | Comments（0） Select Analysis About the Main Composition of Ficus Pumila L. Seed YAN Wen-Bin, YAO Mao-Jun, GU Chen-Hua journal6    2000, 21 (2): 1-3.   Abstract （2349）      PDF（pc） （326KB）（1686）       Knowledge map    Save This paper reports the analysis result about the main composi tion of the wild Ficus Pumila L. seed. It contains protein 14.7%, pectin 10.8% , crude fiber 33.4% , crude fat 24.4% ,H2O 10.7% , ash content 5.1% , and a lot of mineral elements. Scientific basis is offered for exploiting and utilizing Ficus Pumila L. seed. Reference | Related Articles | Metrics | Comments（0） Select Study on Cytomin Influence the Composition of Chinese Gooseberry Fruit SHI Jin-Xiao, LIU Ying-Di journal6    2000, 21 (2): 4-5.   Abstract （2631）      PDF（pc） （396KB）（1352）       Knowledge map    Save Betreated by Bixiaonong- 1 ( cytomin) , the volume and moisture of the fruit all increase. But total acidity,soluble sugar, total ash and vitamin C all reduce, Special flavour drop. Reference | Related Articles | Metrics | Comments（0） Select Study on Soften of Chinese Goosebeery Characteristic and Dynamics of Polyphenolic Oxidase XIAO Zhuo-Bing, CHEN Shang, MA Ming-You, YAO Jun, ZHANG Yong-Kang journal6    2000, 21 (2): 6-8.   Abstract （2306）      PDF（pc） （473KB）（1431）       Knowledge map    Save The study on storage of Chinese goosebeery show: the rate of sof ten is correlated to the content of multiphenolic compounds at room temperature, the content of multiphenolic compounds decrease sharply due to oxidation when it soften. The investigation on its multiphenolic oxidase indicates that : the best subs trate is 4- methylcatechol, the catalytic mechanism can be described by monosubtrate reaction model; the best condition for catalytic reaction is : pH 7.3 and temperature 60  ℃,which measured by oxygen electrode; Michaelis constant is 2. 20 •10- 3mol L- 1, rmax=2. 306 mg•L- 1•min- 1. The result has directive meaning on prevention of soften of Chinese goosebeery. Reference | Related Articles | Metrics | Comments（0） Select Nanosized Zinc Oxide Prepared by Liquid- phase Precipitation LIU Jian-Ben, YI Bao-Hua, XIAO Zhuo-Bing, CHEN De-Gen, CHEN Shang, ZHANG Yong-Kang journal6    2000, 21 (2): 9-11.   Abstract （2036）      PDF（pc） （570KB）（1969）       Knowledge map    Save By using ZnSO4•7H2O and (NH4)2CO3 as materials, Zinc carbonate colloid was obtained in water at room temperature with presence of surface active reagent , then Nanocrystalline ZnO was produced by decomposed after washing and desiccated. Nanosized Zinc Oxide was characterized by X-ray powder diffraction ( XRD) and transmission electron microscope ( TEM) . XRD and TEM show that ZnO crystalline is spherical particle with hexagonal structure, the average diameter size is 5. 7 nm. Reference | Related Articles | Metrics | Comments（0） Select Mechanical Properties of the Metal-Particle/ Insulating Oil System ZHAO He-Ping journal6    2000, 21 (2): 12-15.   Abstract （1875）      PDF（pc） （764KB）（1198）       Knowledge map    Save Rayleigh identity based on a multipole expansion theory is extended to investigatethe mechanical properties of an ideal electrorheological fluid which consists of metal particles with insulating outer layer in a dielectricoil. Evaluation of the effective dielectric constant is emphasized.The dependence of the shear stress  on the shear strain and theshear modulus G for chains of particles arranged on a square lattice are presented. Reference | Related Articles | Metrics | Comments（0） Select The Finite Time Survival Probabilities in the Compound Binomial Model GONG Ri-Chao, YANG Xiang-Qun journal6    2000, 21 (2): 16-19.   Abstract （1930）            Knowledge map    Save The fully discrete binomial risk model are considered and the probabilities of the following events are discussed in this paper: the insurance company survives up to any fixed time n, the insurance company survives up to any fxed time n and the surplus at time n equals x( x≥0) . Finally, the probabilistic laws of the following events are gotten: (i) the index of the claim which causes the ruin, ( ii) the deficit at ruin. Reference | Related Articles | Metrics | Comments（0） Select Gery Topological Space YANG Zhi-Min journal6    2000, 21 (2): 20-23.   Abstract （2012）            Knowledge map    Save In this paper the definition and their concepts of grey topological space are introduced. And on this basis, the relationship between grey topological space and fuzzy and general topological is discussed.There are also studies of grey continuous mapping and compact grey topological space. Reference | Related Articles | Metrics | Comments（0） Select A Characteristics of A Class of Poisson Type Distribution ZOU Hua journal6    2000, 21 (2): 24-27.   Abstract （2463）            Knowledge map    Save It is proved in this parper that population X of nonsingula distribut ion with EX2<∞ is of Poisson type dis-tribution P ( λ, α , 1) if and only i f the statistic T2- T 1 has constantre gression on T 1, where T1= X =1n ni= 1Xi  is sample mean and T2=1n- 1 ni= 1(Xi - X )2 is sample variance. Reference | Related Articles | Metrics | Comments（0） Select Forcast on Trend of China's Main Export Communication Products SUN Feng-Lin journal6    2000, 21 (2): 28-31.   Abstract （2148）      PDF（pc） （586KB）（1322）       Knowledge map    Save In view of the character of China's export communication products, a grey model is established to predict the trend of China's main export communication products, and provides some decision bases for China's export communication products to march towards the international market. Reference | Related Articles | Metrics | Comments（0） Select Exact Traveling Wave Solutions for a Nonlinear Wave Equation in Fluid Mechanics HU Jian-Lan, LI De-Sheng journal6    2000, 21 (2): 32-35.   Abstract （2487）      PDF（pc） （720KB）（1428）       Knowledge map    Save This paper considers a nonlinear wave equation with dissipative-dispersive effect arising in fluid mechnaics. The exact traveling wave solutions to this equation are given. Reference | Related Articles | Metrics | Comments（0） Select The Change of the Pressure to be Resulted in by the Photodissociation of the Gas LI De-Jun journal6    2000, 21 (2): 36-38.   Abstract （1900）      PDF（pc） （963KB）（1284）       Knowledge map    Save When the gas of the chemistry-pure polyatomic molecular is in a closed container and is dissociated into photofragments by the irradiation of the light of the special frequency, we can imagine easily that the pressure in the closed container will change. In this paper, from statistical principle, we have carefully deduced the law of the change between pressure and time,which will play a positive role in exploring the interaction law of light and matter. Reference | Related Articles | Metrics | Comments（0） Select Determination of Trace Hydrocarbon Gases by GC-PID and Its Reliability Analysis WANG Qian, MA Ru-Sen, WANG Rong-Rong, JING Shi-Lian journal6    2000, 21 (2): 39-43.   Abstract （1834）      PDF（pc） （540KB）（1656）       Knowledge map    Save A method to analyse trace hydrocarbons in the air by GC-PID is introduced. The constructure and working principle are discribed. Both of specification of the instument and the analysis results are given. The reliability of theresults is analysed too. Reference | Related Articles | Metrics | Comments（0） page Page 1 of 3 Total 111 records First page Prev page Next page Last page