Multilevel Fuzzy Theory Evaluation of the Tourism Resources in the Three Gorges Reservoir     

HU Li  ZHANG Wei-guo  YE Xiao-su 《保鲜与加工》2006,(2):144-147

Complexity of mutual act and different sensation of different tourists are important factors influencing regional tourism resources evaluation. Fuzzy mathematic method can be used to up quantitative evaluation method on tourism resources evaluation. Taking Wushan Small Three Gorges as an example, the author carries out the evaluation of the tourism resources in the Three Gorges Reservoir. At the same time, the authors consider that five factors, such as improvement of the comunication of tourism resources, quickening the Steps of urbanization in reservior area, must be done well.  相似文献   

东方百合生殖器官诱导鳞茎的繁殖技术研究   总被引：3，自引：0，他引：3  

刘金郎  张占军  李登绚 《中国种业》2006,(8):27-28

以东方百合的花托、花丝、花柱和子房为材料，直接诱导鳞茎和低温锻炼繁殖技术研究。结果表明，4种生殖器官均可直接诱导出鳞茎，分化能力依次为花托〉花丝〉花柱〉子房；鳞茎的中层鳞片分化能力最强；鳞茎分化和生根的最佳培养基是MS＋KT0．05mg／L＋NAA0．2mg／L＋白糖5％＋琼脂0．5％；试管鳞茎移栽的适宜方法是生根的试管鳞茎在2-5℃下，保持60d后栽培到泥炭土：珍珠岩=8：2的基质中，锻炼培养20d。  相似文献   

Work-hardening Mechanism of Non-magnetic High Manganese ZG25Mn18Cr4 Castings     

ZHANG Ding-fei  PENG Jian  YANG Jing  ZHANG Li  TANG Chang-fa 《保鲜与加工》2006,(11):78-80100

The important character of non-magnetic high manganese ZG25 Mn18Cr4 alloy is rapid work-hardening under external stress. With X-ray diffraction and TEM analysis, it is proved that the microstructures of both undeformed and deformed matrixes are austenite and carbide with some striation structure in the matrixes, the amount of stripes in the deformed matrix is obviously more than that in the undeformed matrix. Electronic diffraction analysis confirmed that the stripes in coarse austenite grains are high density lamination fault sheets. A great deal of lamination fault sheets produced by plastic deformation divides up austenite matrix, shortens the free distance of dislocation movement and results in the rapid work-hardening of ZG25Mn18Cr4 alloy.  相似文献   

Reference Efficiency of Planetary Gear Train     

CUI Li  QIN Da-tong  SHI Wan-kai 《保鲜与加工》2006,(3):11

Reference efficiency of a pair of gear drive without planetary motion is the base to calculate efficiency of the whole planetary gear train. The authors find reference efficiency for speed increase is higher than that of the same drive used for speed reduction. This is different from the earlier viewpoint. New equations are derived for correctly calculating the reference efficiency of spur gear and helical gear with internal conjugate and external conjugate either in the state of speed increase or speed reduction respectively. The equations are also used to calculate efficiency of 2K-H planetary gear train.  相似文献   

THE BASIC PROPERTIES OF CONDITIONAL EQUATION WITH ACCUMULATIVE STATE     

Wang Yuanliang Li Shiqi 《保鲜与加工》1992,(2):116-121

Several aspects of the conditional equation derived from the accumulative equation are discussed in detail. The results indicate that the conditional equation not only is well consistent with the principles of electronegativity and absolute hardness equalization, but also satisfies the bonding of a full -prerequisite condition, e. g. two like electronic charge species repel and unlike attract each other'. In addition these principles are in the accumulative state. Mathematically, some other aspects of the conditional equation are worth studying based on the generalization of this equation.  相似文献   

CALCULATION OF ULTIMATE STRESS OF UNBONDED PRESTRESSED TENDONS IN UNSYMMETRICAL DEFLECTED BEAMS     

Pan Li Institute of Building Structures  China Academy of Building Research 《保鲜与加工》1989,(3)

  相似文献   

INTERCONNERCTION BETWEEN SUPER-MINICOMPUTER ETHERNT E     

Li Hua Wu Zhongfu Chen Dazhi 《保鲜与加工》1989,(2):35-42

  相似文献   

VARIATIONAL METHOD TO TUBE STRUCTURES OF COMPLICATED SHAPE     

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

  相似文献   

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