VARIATIONAL METHOD TO TUBE STRUCTURES OF COMPLICATED SHAPE     

Li Zhenqliang Shui Guohui Feng Yiran 《保鲜与加工》1991,(4)

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THE REIMPROVEMENT FOR IMPULSE OF G. I. TAYLOR THEORY OF PLASTIC DEFORMATION IN IMPACT OF CYL1NDICAL PROJECTILES     

Liu Xiangchen Li Zeqiang 《保鲜与加工》1991,(5):109-115

In this paper the reimprovement for G. I. Taylor theory of plastic deformation in impact of cylindical projectiles is done. The impulse in the reimproved theory is G. I. Taylor' s 1/2, and 3/4 of G. I. Taylor' s improved theory. The analytical solution of the reimproved theory shows that it gives better agreement with exprimental results than those of the original Taylor' s theory and, the improved theory.  相似文献   

玉米果穗发育的生理特性研究   总被引：1，自引：0，他引：1       下载免费PDF全文

孟剑霞  李刚 《中国农学通报》2007,23(2):267-267

为了探讨玉米优良自交系选育中出现短苞叶品种的原因，从生理角度分析了两玉米自交系品种穗轴与苞叶生长发育变化趋势。结果表明：四个时期中139号苞叶硝酸还原酶活性非常低，对照1号的稍高一些。139号苞叶谷氨酰胺合成酶活性小于1号，且1号的酶活性变化较平缓。139号雌穗轴硝酸还原酶活性变化剧烈，授粉后15d达高峰，明显大于1号。139号雌穗轴谷氨酰胺合成酶活性前三时期始终大于1号，最后一时期二者几乎相等，但1号的酶活性变化平缓。就上述结果从氮代谢方面分析了139号苞叶与穗轴发育失调的原因。  相似文献   

Research on Financing Plan for International Cooperative Project in Housing Industrialization     

YE Xiao su  ZHENG Jie  HU Li  PAN Sheng shu 《保鲜与加工》2002,(1):59-64

Housing industry is a prop industry with great potential, but it is restricted by shortage of funds. So it is necessary to probe the financing system of housing industrialization in China. This paper puts forward a financing plan for the international cooperative project in industrialized housing in Chongqing. Furthermore, it investigates the concrete financing system of the whole housing industry.  相似文献   

A Study on the Reduction of Hexavalent Chromium Ion in the Process of Sintering and Ironmaking     

Li Zushu Xu Chushao Chen Guangbi 《保鲜与加工》1997,(5):119-124

The basic principle of using chromium leach residue as melting flux of blast furnace is introduced in this paper.The reduction thermodynamics of Na 2CrO 4 and chromium oxides in the process of sintering and ironmaking is studied,and the simulating experiments in the laboratory and industrial experiments in 600 m 3 blase furnace are carried out.The results of thermodynamical study and experimental study show that hexavalent chromium ion in the burden can be well eliminated in the process of sintering and ironmaking.  相似文献   

An Expert System Approach to the Computer Aided Design of Intelligent Controllers     

Tu Yaqing Li Zushu Huang Shanglian 《保鲜与加工》1993,(2):24-29

The idea for an expert system approach to the computer aided design of intelligent controllers (ESCAD1C) is discussed and the idea of two step modelling of an intelligent controller is presented on the basis of emulating human control behaviours to solve complex problems. The structure, functions and characteristics of ESCADTC system , and the design procedures of intelligent controllers are gived. The knowledge base and simulating functions for designing intelligent controllers are also described.  相似文献   

A Study on Human Simulation Intelligent Control Algorithm to a Category of Objects     

Tu Yaqing Huang Shanglian Li Zushu 《保鲜与加工》1993,(6):8-15

Based on the model of Human Simulation Intelligent Controller (HSIC) presented briefly, a detailed algorithm was described for the servo system control by using the method of HSIC. Simulation results obtained proves the good performance of the control algorithm.  相似文献   

A New Monte Carlo Method Based on State Analysis     

Ran Li Ren Zhen Huang Wenying 《保鲜与加工》1993,(6):21-26

A new Monte Carlo Method for system reliability evaluation is proposed in this paper. The repeated sampling of system states with relatively great probabilities is avoided in the simulation,thus the sampling efficiency is significantly improved. Besides,the negative correlations used in different trials can further reduce the estimated varinaces. The sparse matrix technique is employed to reduce the memory requirement and to save the computer time. Comparative studies show that the method proposed is of great value and the application to the IEEE reliability test system (power system) is successful.  相似文献   

THE MIXED MODE FRACTURE CRITERION OF BRITTLE ROCK UNDER COMPRESSION-SHEAR STRESS STATE     

Fu Gang Li He Xian Xuefu Yin Guangzhi 《保鲜与加工》1990,(2)

In this paper the test results of mixed mode fracture of three kinds of brittle rock under two kinds of stress paths are reported. The fracture mechanism and failure patterns of brittle lock under different stress paths are discussed. Theory analysis and test results show that the Compression- Shear fracture criterion of brittle rock can be expressed:  相似文献   

白血病抑制因子（LIF）及其受体在月经 周期猕猴卵巢内的表达     

岳占碰  李世杰  张学明  韩春田  郭斌  王洪斌  杨增明 《中国农学通报》2006,22(2):14-14

应用免疫细胞化学方法对白血病抑制因子（leukemia inhibitory factor, LIF）、白血病抑制因子受体（leukemia inhibitory factor receptor, LIFR）和gp130在月经周期猕猴卵巢内的表达进行了研究。结果表明：LIF、LIFR和gp130在猕猴卵巢内的表达量随月经周期的不同而变化，LIF及其受体在增殖期卵巢内的表达量高于分泌期的卵巢。LIF及其受体在原始卵泡、腔前卵泡和有腔卵泡的卵细胞内表达量均较高，在颗粒细胞、卵泡膜、卵巢生殖上皮和卵巢基质中有少量表达，而在闭锁卵泡、退化的黄体和卵巢髓质中未见表达。LIF及其受体在猕猴卵巢内的表达可能受卵巢分泌的类固醇激素所调控，LIF可能通过自分泌或旁分泌的方式在猕猴卵泡发育及排卵等过程中起重要作用。  相似文献