ON THE GROWTH OF SOLUTIONS OF HIGHER-ORDER ALGEBRAIC DIFFERENTIAL EQUATIONS

Using Nevanlinna theory of the value distribution of meromorphic functions, the author investigates the problem of the growth of solutions of two types of algebraic differential equation and obtains some results.

Simulation About the Growth of Chinese Firm's Safety Management Capability

Aiming at the deficiency of exterminating measures of Chinese firm safety management, a simulation model of Chinese firm＇s safety management capability based on the organizational learning theory, in which the simulation method of system dynamics is utilized. The level variable and rate variable are designed based on the practical situation and change situation of corresponding variables of firm＇s safety management ca- pability. Simulation firms are built with accident case groups of the oil industry, chemical industry, machine industry, coal mining industry, and weapon industry. Through analyzing the simulation result, the growth law of Chinese firm＇s safety management capability is obtained as follows： the accumulating and the coupling of safety knowledge should be emphasized at the same time; the balance of learning behavior of individual, group and organization should be considered together; different types of Chinese firm should take different safety policies according to their practical situations.

EFFECTS OF PSEUDOFYPE RETROVIRUS CONTAINING HUMAN N-RAS ANTISENSE GENE ON THE GROWTH OF HUMAN LIVER CANCER LTNM4 TRANSPLANTED IN NUDE MICE

An amphotropic pseudotype retrovirus containing human N-ras antisense gene was constructed and packaged with helper cells. It has been previously demonstrated that the virus did inhibit the growth of human hepatocarcinoma cell line PLC PRF/5 in vitro accompanied with the blockage of p21 expression. Based on these results, further study was carried on to examine the effect of these viruses on the growth of human hepatoma transplanted LTNM4 in nude mice. It has been shown that the retrovirus containing human antisense N-ras gene could inhibit the hepatoma in nude mice at a rate of 78% (P<0.05) as compared with saline control. No inhibition was observed in group treated with retrovirus which contained no N-ras sequence. These results in vivo lend further support that human N-ras antisense gene mediated by retrovirus could block the expression of the relevant oncogene and lead to the inhibition of cancer growth. It also provided the basis for further approaches of gene therapy for human cancer.

Transformation of the Growth Mode:What Must Be Changed?

That the Chinese economy has been burgeoning for nearly 30 years is an irrefutable fact.However,this robust growth has been achieved amidst accusations of"extensive"development and"low-efficiency".Many scholars believe that low-priced labour is pivotal to China’s rapid growth.Even so,we find it hard to explain why China has been able to achieve sustained growth while so many countries with even lower labour costs remain trapped in poverty The following article offers a new perspective upon this paradox.

Advancement in Science and Technology Enhanced the Growth of China's Electric Power Industry

Within the seven years’ period from 1987 to 1994. the total installed capacity of China’s electric power industry doubled from 100 GW to 200 GW. This high rate of growth has imposed new and more stringent requirements on all the branches in the

MECHANISM OF THE GROWTH, NUCLEATION, AND HETEROEPITAXY OF METASTABLE DIAMOND FILMS ON ATOMIC SCALE

The mechanism of chemical-vapor-deposited (CVD) diamond film growth has attracted increasing attention recent years, mainly due to the fact that further technological advancement (such as obtaining high-quality films, controlling film growth, and heteroepitaxial growth, etc.) requires a more detailed understanding of the fundamental phenomena responsible for diamond growth.

ATTEMPTS AND EXPLORATIONS TO ENTER THE MARKET: THE GROWTH AND DEVELOPMENT OF HIGH- AND NEW-TECH ENTERPRISES

In 1984, under the guideline laid down by the Communist Party of China, "economic construction must rely on science and technology, and science and technology must be geared to serve economic construction", the CAS began to encourage enthusiastically its scientific and technical personnel to run high-and new tech enterprises.At present,there are more than 500 S&T enterprises at the Academy,including five (group)corporations directly under the jurisdiction of the Academy, 21 co-operation enterprises,40 or so

The effect of endogenous transforming growth factor β_1 on the growth of bladder cancer cells in vitro

Objective To investigate the influence of endogenous transforming growth factor β1(TGFβ1) on the cell cycle regulation and proliferation of bladder cancer. Methods A constructed replication defective retroviral vector pRevTβ-AS, which carried antisense RNA of TGFβ1.was transfected to a bladder cancer cell line EJ. The proliferation and clone-formation of transferred cells were observed in vitro,and the alteration of cell cycle was also detected by flow cytometric analysis. Results TGFβ1 antisense RNA was transferred into EJ cell and expressed efficiently. After the inhibition of target gene expression in EJ cells, the reduced growth and clone-formation rates were demonstrated, and the proliferative indexes were decreased by 12 % . The ratios of GO and G1 stage cells to June 2003 Vol12 No2 the antisense RNA-transfected EJ cells were increased, simultaneously,the ratio of S stage cells to the antisense RNA-transfected EJ cells ratios were decreased, compared with the control group. Conclusion The

The Growth Factor

IN the remote district of Amuria, 250 km east of Uganda＇s capital Kampala. a group of Ugandan men sit around a table watching two players at the local board game called Omweso.

The effect of interleukin 6 on the growth of LNCaP and PC-3 prostatic carcinoma cells

Objective To investigate the effect of IL-6 on prostatic carcinoma cell lines, and differential effects on androgen-dependent and androgen-independent prostatic carcinoma cells. Methods The IL-6 producing capacities of LNCaP and PC-3 cells were determined, and effects of exogenous IL-6 and anti-IL - 6 antibodies on LNCaP and PC - 3 cells were examined. Results LNCaP produced a very small amount of IL-6, but PC-3 produced more, the concentraion of IL-6 being 190 pg/48 h per ml(1 × 106). The exogenous IL-6 inhibited LNCaP growth significantly,but had no obvious effect on PC -3 cells. Anti-IL-6 antibodies lowered PC-3 cells growth rate but had neutral effect on LNCaP. Conclusion PC-3 cells produces IL-6 massively in autocrine manner. IL-6 could be antagonized by anti-IL-6 antibodies,resulting in slowing PC-3 cells growth, and LNCaP cells growth could be inhibited by exogenous IL-6.7 refs,2 tabs.

Exploring the growth mechanism of CuSbSe_(2)thin film prepared by electrodeposition

Copper antimony selenium(CuSbSe_(2))has advantages of adjustable band gaps from 1.09 eV to 1.2 eV,high light absorption coefficient(>105 cm-1),and low grain generation temperature(300—400℃),which is suitable for the preparation of solar cells.However,the stable range of CuSbSe_(2)(CASe)phase is narrow,which is inevitable to form Sb_(2)Se_(3)and Cu_(3)SbSe_(4)second phase during the preparation process.In this work,selenization annealing of Sb/Cu metal layer to prepare CASe thin films with pulse electrodeposition process was studied,and the growth mechanism of CASe film was analyzed.Cu and Sb reacted with Se to form Cu_(2)Se and Sb_(2)Se_(3),respectively.Then Cu_(2)Se and Sb_(2)Se_(3)further reacted to generate CASe.Since the formation temperature of Cu_(3)SbSe_(4)was lower than that of CASe,the preferential formation of Cu_(3)SbSe_(4)led to layer separation.When the annealing temperature was too high,CASe decomposed to form Cu_(3)SbSe_(3)and Sb_(2)Se_(3).Additionally,by increasing the heating rate,the separation of CASe thin films was effectively improved,and the CASe thin films with relatively high crystallinity were obtained at 360℃with heating rate of 30℃/min and selenization time of 20 min.

ON THE GROWTH OF SOLUTIONS OF A CLASS OF HIGHER ORDER DIFFERENTIAL EQUATION

In this paper, a class of higher order linear differential equation is investigated. The order and the hyper-order of the solutions of the equation are exactly estimated under some certain conditions.

Structure optimization of high indium content InGaAs/InP heterostructure for the growth of In_(0.82)Ga_(0.18)As buffer layer

Microstructure and misfit dislocation behavior in In_xGa_(1-x)As/InP heteroepitaxial materials grown by low pressure metal organic chemical vapor deposition(LP-MOCVD) were analyzed by high resolution transmission electron microscopy(HRTEM), scanning electron microscopy(SEM), atomic force microscopy(AFM), Raman spectroscopy and Hall effect measurements. To optimize the structure of In_(0.82)Ga_(0.18)As/InP heterostructure, the In_xGa_(1-x)As buffer layer was grown. The residual strain of the In_(0.82)Ga_(0.18)As epitaxial layer was calculated. Further, the periodic growth pattern of the misfit dislocation at the interface was discovered and verified. Then the effects of misfit dislocation on the surface morphology and microstructure of the material were studied. It is found that the misfit dislocation of high indium(In) content In_(0.82)Ga_(0.18)As epitaxial layer has significant influence on the carrier concentration.

THE MICROPHYSICAL STRUCTURE OF SNOW CLOUDS AND THE GROWTH PROCESS OF SNOW PARTICLES IN WINTER IN XINJIANG

The microphysical structure of snow clouds and the growth process of snow crystals were observed by means of instrumented aircraft, weather radar, snow crystal observations etc. in Urumqi region during the winter of 1982. The analysis of three cases show that about 70% of snow mass growth is produced in the lower layer below 2000 m under the cold front, and that the concentration of ice crystals is as high as 60 L^(-1) and the supercooled water is absent in lower clouds. We may infer that the deposition of ice crystals and the aggregation of snow crystals are important processes for the snow development. The microphysical structure of the snow band near the front aloft and its characteristics as a seeder cloud are also described in this paper.

The Growth and Species-by-site Interaction of 18 Central American Multipurpose Tree Species Grown at 15 Tropical Sites World-wide

From a world-wide plant introduction trial series utilising 25 central American species planted at over 100 sites in nearly 60 countries, eighteen species planted at 15 sites in the tropics were chosen for further study of the factors determining site productivity and site by species interactions. The species were Acacia pennatula, Acacia farnesiana, Albizia guachapele, Ateleia herbert-smithii, Caesalpinia coriaria, Caesalpinia eriostachys, Caesalpinia velutina, Enterolobium cyclocarpum, Gliricidia sepi...

The Growth of CALL in China——An Overview by Huang Jun from Ji'nan University,Guangzhou

1.Birth of CALLNET in Shanghai,Feb 1984 Tim Johns of Birmingham University conducted aCALL workshop,the first in China,at Shanghai Jiaotong University.It went so well that the 24 partic-ipants,mostly EFL teachers from 15 universities and institutes,founded an association CALLNET withZhang Yanbing and the author as coordinators and Tim as consultant.Tim brought the news to the Chi-nese University,Hong Kong,and Herbert Pierson joined in.

Deposition pressure effect on the surface roughness scaling of microcrystalline silicon films

The scaling behaviour of surface roughness evolution of microcrystalline silicon （/zc-Si：H） films prepared by very- high frequency plasma-enhanced chemical vapour deposition （VHF-PECVD） has been investigated by using a spectroscopic eHipsometry （SE） technique. The growth exponent β was analysed for the films deposited under different pressures Pg. The results suggest that films deposited at Pg = 70 Pa have a growth exponent β about 0.22, which corresponds to the definite diffusion growth. However, abnormal scaling behaviour occurs in the films deposited at Pg = 300 Pa. The exponent β is about 0.81 that is much larger than 0.5 of zero diffusion limit in the scaling theory. The growth mode ofμc-Si：H deposited at Pg = 300 Pa is clearly different from that of μc-Si：H at Pg = 70 Pa. Monte Carlo simulations indicate that the sticking process and the surface diffusion of the radicals are two key factors to affect the growth mode under different pressures. Under Pg = 300 Pa, β〉 0.5 is correlated with the strong shadowing effect resulting from the larger sticking coefficient.