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| 1 | THE STRUCTURE OF ARMILLARIZIN,A NEW PROTOILLUDANE SESQUITERPENOID AROMATIC ESTER FROM ARMILLARIA MELLEA(VAHL.EX FR)QUEL.显示文摘A new protoilludane sesquiterpenoid aromatic ester,named armillarizin(1)has been isolated from the artificially cultured mycelium of Armillaria me-llea(Vahl.ex Fr)Quel.(Tricholomataceae).Its structure was deduced on the ba-sis of spectral analyses.The relative configuration was established from thenuclear Overhauser effects and from the values of ~1H-~1H coupling constants. | Jun Shan YANG Ya Lun SU Yu Lan WANG Xiao Zhang FENG De Quan YU Xiao Tian LIANG Institute of Materia Medica,Chinese Academy of Medical Sciences,Beijing,100050 | 1990 | Chinese Chemical Letters1990，1，2： | 8 |
| 2 | INTRACLOUD LIGHTNING DISCHARGES IN THE LOWER PART OF THUNDERCLOUD显示文摘From analysis of observational data of thunderstorms in Gansu,China,it was deduced that the electricstructure of thunderclouds in this region is often positive charge in the upper,main negative in the middlelayer and another positive charge,large in magnitude and extensive in dimension,in the lower part.Intra-cloud discharges often take place between the main negative charge and lower positive charge instead of upper.Case analysis of 6 intracloud discharges in two storms on August 3 and 4,1986 shows that the centers of thesedischarges and the dipole moments destroyed were at the altitude of 3.8—6 km msl(7.6—-13.5℃)and 18—40 C km,respectively. | 刘欣生 叶宗秀 邵选民 王才伟 言穆弘 郭昌明 | 1989 | Acta meteorologica Sinica1989，3，2： | 6 |
| 3 | EXPONENTIALLY BOUNDED C-SEMIGROUP AND INTEGRATED SEMIGROUP WITH NONDENSELY DEFINED GENERATORS I: APPROXIMATION:显示文摘In this paper, by Laplace transform version of the Trotter-Kato approximation theorem and the integrated C-semigroup introduced by Myadera, the authors obtained some Trotter-Kato approximation theorems on exponentially bounded C-semigroups, where the range of C (and so the domain of the generator) may not be dense. The authors deduced the corresponding results on exponentially bounded integrated semigroups with nondensely generators. The results of this paper extended and perfected the results given by Lizama, Park and Zheng. | 郑权 雷岩松 | 1993 | Acta Mathematica Scientia1993，13，3： | 5 |
| 4 | BAIMUXIFURANIC ACID,A NEW SESQUITERPENE FROM THE VOLATILE OIL OF AQUILARIA SINENSIS(LOUR.)GILG.显示文摘A new sesquiterpenoid,named baimuxifuranic acid,has been isolatedfrom the volatile oil of Aquilaria sinensis(Lour.)Gilg.belonging to the familyThymelaceae by silica gel column chromatography.Based on spectral analysis itsstructure was deduced as(1).Reduction of baimuxifuranic acid by LiAlH4 gave | Jun Shan YANG Yu Lan WANG Ya Lun SU Institute of Materia Medica Chinese Academy of Medical Sciences,Beijing 100050. | 1992 | Chinese Chemical Letters1992，3，12： | 5 |
| 5 | STUDIES ON THE INDOLE ALKALOIDS OF GELSEMIUM ELEGANS显示文摘The modified Hofmann degradation of koumine(1) has proved abortive. The struture and stereochemistry of the main product(3) were deduced by spectral methods and confirmed by X-ray diffration analysis. From the roots of Gelsemium elegans, dihydrokounine was first isolated as a natural product. | Zong Ping ZHANG~*, Xiao Tian LIANG, Fang SUN, Yang Lü, Jing YANG Institute of Materia Medica,Chinese Academy of Medical Sciences, Beijing 100050 Qi Yi XING Department of Chemistry, Peking University, Beijing 100871 | 1991 | Chinese Chemical Letters1991，2，5： | 2 |
| 6 | TWO-DIMENSIONAL STRESS WAVE ANALYSIS IN INCOMPRESSIBLE ELASTIC SOLIDS显示文摘Two-dimensional stress waves in a general incompressible elastic solid are investigated.First,basic equations for simple waves and shock waves are presented for a general strain energy function.Then the characteristic wave speeds and the associated characteristic vectors are deduced.It is shown that there usually exist two simple waves and two shock waves.Finally,two examples are given for the case of plane strain deformation and antiplane strain deformation,respectively.It is proved that,in the case of plane strain deformation,the oblique reflection problem of a plane shock is not solvable in general. | 唐之景 丁启财 李永池 | 1989 | Applied Mathematics and Mechanics(English Edition)1989，10，8： | 1 |
| 7 | THREE METHODS FOR ESTIMATING TURBULENT STRESS AND DRAG COEFFICIENT IN TIDAL CURRENTS OF THE HANGZHOU BAY显示文摘In this paper, we employed three metbods for measuring and estimating the turbulent stress and the results obtained were in good agreement with each other. The first method is a direct application of the momentum equations; the second one is based on the integration of momentum equations over an area, by which an overall estimate of the stress term for the area can be obtained; while the third one makes use of the energy equation and from which the estimate of the drag coefficient is deduced. | 方国洪 李身铎 曹德明 | 1987 | Chinese Science Bulletin1987，32，4： | 1 |
| 8 | Valence electronic structure of tantalum carbide and nitride显示文摘The valence electronic structures of tantalum carbide (TaC) and tantalum nitride (TaN) are studied by using the empirical electronic theory (EET). The results reveal that the bonds of these compounds have covalent,metallic and ionic characters. For a quantitative analysis of the relative strength of these components,their ionicities have been calculated by implanting the results of EET to the PVL model. It has been found that the ionicity of tantalum carbide is smaller than that of tantalum nitride. The EET results also reveal that the covalent electronic number of the strongest bond in the former is larger than that of the latter. All these suggest that the covalent bond of TaC is stronger than that of TaN,which coincides to that de-duced from the first-principles method. | FAN ChangZeng1,2,SUN LiLing2,WEI ZunJie1,MA MingZhen3,LIU RiPing3,ZENG SongYan1 & WANG WenKui3 1 Department of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China 2 National Laboratory for Superconductivity,Institute of Physics,Chinese Academy of Sciences,Beijing 100080,China 3 National Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qin-huangdao 066004,China | 2007 | Science China(Physics,Mechanics & Astronomy)2007，50，6： | 1 |
| 9 | Study on Cloud-Radiation Effect on Climate in Eastern Asia显示文摘In this paper, the decade data of meteorological satellite and surface meteorological observation of China have been analysed. The relationship between cloud and radiation has been studied. A set of empirical formulae of the ralationships between the albedo and cloud amount, the outgoing longwave radiation and cloud amount in Chinese different districts and different seasons has been deduced. They express simply the response of both planet reflectivity and earth-atmosphere outgoing longwave radiation to the change of cloud amount. So that the sensitivity of net radiation of the earth-atmosphere system to the change of cloud amount and the ratio of cloud reflective effect to greenhouse effect can be estimated. In this paper, the radiative process of the earth-atmosphere system, cloud and radiative balance and its effect on climate have been synthetically studied. | 赵柏林 张晓黎 朱元竞Department of Geophysics Peking University Beijing 100871 | 1992 | Advances in Atmospheric Sciences1992，9，3： | 1 |
| 10 | Total Reaction Cross Section Measurements at Intermediate Energy for the Proton Halo Candidate ^(23)Al and Its Neighbours显示文摘Total reaction cross sections σR for some proton-rich isotones (N = 10) near ^(23)Al on a carbon target have been measured at intermediate energies in the experiment performed at the Radioactive Ion Beam Line of the Heavy Ion Research Facility in Lanzhou. The Z-dependence of σR shows a remarkable enhancement for ^(23)Al relative to its neighbours. The difference factor d has been deduced from the measured σR by using the Glauber or Boltzmann-Uehling-Uhlenbeck models. From the above analysis, a possible one-proton halo structure is suggested for ^(23)Al. | 蔡翔舟 沈文庆 冯军 方德清 朱志远 蒋维洲 马余刚 张虎勇 钟晨 余礼平 詹文龙 郭忠言 肖国青 王建松 诸永泰 王金川 李加兴 王猛 王建峰 宁振江 王全进 陈志强 | 2001 | Chinese Physics Letters2001，18，9： | 0 |
| 11 | The Dynamic Mechanism of the Formation of the Low Level Jet显示文摘The ordinary multidimensional reductive perturbation method is generalized so as to apply to the general case including the dissipative factor. With this the corresponding Cubic-Schrbdinger equation is deduced, and by the preliminary study of its solution, it shows that it is more admissible to consider atmospheric meso-scale systems as the nonlinear Cubic-Schrbdinger waves.With suitable boundary and initial conditions, the Cubic-Schrodinger equation is numerically integrated so as to investigate the possible dynamic mechanism as well as the impacts of the nonlinear action, turbulent friction and topogrphy to the formation of the LLJ. The results indicate that the downward transfer of the momentum and the effect of the surface friction are responsible for the concentration of the momentum in the layer between 850 and 700 hPa. The location of the horizontal concentration of momentum depends on the propagation of momentum, in the process the inertia-gravity internal wave is very important, whereas | 杨大升 简茂球 | 1990 | Advances in Atmospheric Sciences1990，7，4： | 0 |
| 12 | A NOTE ON DERIVATIVES OF FUNCTION AND THEIR FOURIER TRANSFORMS IN L_2显示文摘The purpose of this article is to indicate the shortcomings of a few theorems of[1].Moreover.some interesting results are deduced. | 周晓钟 刘兴权 | 1990 | Applied Mathematics and Mechanics(English Edition)1990，11，1： | 0 |
| 13 | VISCOMETRIC BEHAVIOR OF SODIUM SALT OF POLY-6-SULFOHEXYL METHACRY-LATE SOLUTIONS IN THE PRESENCE OF ADDED SALTS BY MEANS OF STATISTICAL METHOD显示文摘Conway, Markovitz et al. have already studied the relationship between the specific viscosity and concentration of polyelectrolyte on the different concentrations of added salt and deduced some empirical equations. Yeh has already proposed an empirical equation, which expresses the relation among the intrinsic viscosity [η] and added salt C_s and the molecular weight M in certain range of concentration. In the range of intermediate C_s, it is given | 陈竹生 周芝英 | 1984 | Chinese Science Bulletin1984，29，7： | 0 |
| 14 | THE RISE MODEL OF BUOYANT PLUME LIMITED BY MECHANICAL TURBULENCE显示文摘This paper has investigated the rise of bent-over buoyant plume in neutral condition. By means ofthe combined-effect model proposed at earlier time, authors have deduced a formula of final rise limited bymechanical turbulence and therefore have concluded that the corresponding formula neglecting the accumu-lated effect of ambient turbulence is only its particular case. By analyzing the function relation of the variousaffecting factors with the plume rise in the existing equations, it is proved that the formula derived fromthe combined-effect model is the most reasonable and shows more conformity to the observations. | 李宗恺 朱玄玄 | 1990 | Acta meteorologica Sinica1990，4，2： | 0 |
| 15 | Effective Jump Length of Coupled Continuous Time Random Walk显示文摘The concept effective jump length is proposed.Due to the joint probability density function of jump length and waiting time,it is complicated to distinguish the diffusion types.However,we calculate the probability density function of effective jump length for the coupled continuous time random walk model we proposed previously.The mean square displacements deduced are coincident with the known results.More importantly,we find that the anomalous diffusion induced by the coupled model is equivalent to the competition between long jump length and long waiting time. | 刘剑 包景东 | 2013 | Chinese Physics Letters2013，30，2： | 0 |
| 16 | TIME SERIES MODEL OF LONG-RANGE PREDICTION AND ITS APPLICATION显示文摘By generalizing the concept of mean in mathematical statistics to a mean generation function(MGF),the extended matrix of MGF is defined and then a new model of time series is presented.A calculatingsehemefor modelling of monovariate time series is deduced cooperating with a normalization procedure of vectorand a couple score criterion.An example of climatic prediction for ten-year scale is given in this paper,thetendency of variation for every year can be predicted skillfully with the model. | 曹鸿兴 魏凤英 王永中 | 1990 | Acta meteorologica Sinica1990，4，1： | 0 |
| 17 | ON THE MAXIMALITY OF SOME PAIRS OF p-t DEGREES显示文摘S. A. Cook introduced in [1] the concept of p-t reducibility, and the deduced equivalent class is called the p-t degree which is partially ordered by the relation '≤' which is also deduced from the p-t reducibility. R. E. Ladner and K. Ambos-Spies have given a wide discussion on the structural properties of p-t degrees with '≤'. They proved that there | 郑锡忠 | 1992 | Chinese Science Bulletin1992，37，6： | 0 |
| 18 | IDENTIFICATION OF THE BINDING MODEL OF POLYVALENT ANTIGEN AND IgM显示文摘According to the materials of molecular level on IgM and polyvalent antigen in recent years, we presented the binding model of IgM and polyvalent antigen, and deduced the formula of antigen critical concentration on the basis of Crothers and Metzger’s work when IgM cross-linked with polyvalent antigen. The formula is as follows: | 贾万钧 张建宗 鲁志新 | 1981 | Chinese Science Bulletin1981，26，5： | 0 |
| 19 | GENERALIZED BIANCHI'S IDENTITIES FOR VARIANT CONSTRAINED SYSTEM显示文摘In this paper the generalized Bianchi’s identities for the variant constrained system (GBIVOS)w ith non-invariant action integral and constraint conditions was derived, and the strong and weak conservation laws for such system was deduced. The preliminary applications of the GBIVCS to the case for some models of field theories was given. The Dirac constraint of such system was discussed. | 李子平 | 1992 | Acta Mathematica Scientia1992，12，3： | 0 |
| 20 | The essential aspect and regular pattern of ion transfer across the liquid-liquid interface显示文摘Three empirical rules of interfacial potential and Gibb’s energy with the radius,chargenumber of transfer ions and dielectric constant of organic phase are obtained for the ion transfer acrossthe liquid-liquid interface,which are verified by the transfer of simple anions,dye ions and metalions facilitated by neutral ionophores across the interface between water and some organic solvents,and deduced theoretically based on the electrostatic interaction of ion and high-permittivity solvent.The rules are proved to be effective of choosing supporting electrolytes and searching for new transfersystem which follows the rule that r/n of transfer ion should be larger than that of electrolytes ion inwater phase and less than that in organic phase.A rule for judgement of the charge sign of transferion is suggested firstly based on the relationship between interfacial half-wave potential and dielectricconstant of organic phase. | WANG,Er-Kang SUN,Zhi-Sheng Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022 | 1990 | Chinese Journal of Chemistry1990，8，3： | 0 |
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