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 scatter factor 分散系数(13)散射因子(10)扩散因子(9)
 分散系数
 A Better Method for Determining Fatigue Scatter Factor of Aircraft Structures 飞行器结构疲劳寿命分散系数理论值确定的一种方法 短句来源 Fatigue Life Scatter Factor' s Computing Formulas of Airplane Structures in Countries 国内外飞机疲劳寿命分散系数计算 短句来源 When fatigue life follows two parameter Weibull distribution or lognormal distribution, fatigue life scatter factor method and minimum reliability method are proposed for evaluating component reliability with small samples and zero failure. 针对疲劳寿命服从两参数威布尔或对数正态分布的情况 ,提出了两种适用于小样本、零失效的可靠性评估方法 :疲劳寿命分散系数法和可靠度下限法 短句来源 To analyze the difference and relation of these two scatter factors,the scatter factor formulas of fatigue life which obeys two parameter Weibull distribution are presented for theoretical calculation and fatigue testing and the values of scatter factors for different materials are given. 为分析疲劳寿命服从这两种不同分布时分散系数的区别和联系 ,导出了疲劳寿命服从双参数威布尔分布时的理论和试验用疲劳寿命分散系数计算公式 ; 短句来源 The fatigue life of civil aircraft structures obeys two parameter Weibull distribution,its scatter factor is significantly different from that obeys logarithm normal distribution . 民机结构的疲劳寿命服从双参数威布尔分布 ,其分散系数与战斗机基于对数正态分布的疲劳寿命分散系数存在明显的不同 . 短句来源 更多
 散射因子
 Properties of collimator scatter factor (Sc) of cobalt60 unit ~(60)Co机准直器散射因子(Sc)的性质 短句来源 Objective: The phantom scatter factor Sp was measured directly according to its definition. 目的：按 Sp的定义，直接测量体模散射因子 Sp。 短句来源 Purpose The properties of collimator scatter factor (Sc) was measured in order to form the basis of clinical usage. 目的测量60Co机准直器散射因子（Sc）的性质，为临床使用提供依据。 短句来源 Objective To design up a simple and accurate calculation method for collimator scatter factor (Sc), which can be easily implemented in clinical works. 目的　建立一种简单准确适合于临床应用的准直器散射因子(Sc)的计算模型。 短句来源 A simple and accurate algorithm based on a dual source photon beam model for calculation of collimator scatter factor 基于双源光子模型的准直器散射因子新算法 短句来源 更多
 扩散因子
 Objective: Our aim was to investigate the relationship between vascular endothelial growth factor (VEGF), hepatocyte growth factor/scatter factor (HGF/SF), transforming growth factor β 1(TGF β 1) and arteriosclerosis obliterans (ASO). 目的 :探讨血管内皮生长因子 (VEGF)、肝细胞生长因子 /扩散因子 (HGF/SF)、转化生长因子 β1(TGF β1)与下肢动脉硬化闭塞症 (ASO)之间的关系。 短句来源 Objective: In order to investigate the relationship between hepatocyte growth factor/scatter factor(HGF/SF),nitric oxide(NO),transforming growth factor-β 1(TGF-β 1)and atheriosclerosis obliterans(ASO). 目的 :探讨肝细胞生长因子 /扩散因子 (HGF/SF)、转化生长因子 β1(TGF β1)、一氧化氮 (NO)与动脉硬化闭塞症 (ASO)之间的关系 ,阐明HGF/SF等在ASO发病及疾病进展和预后中的临床意义。 短句来源 Scatter factor (hepatocyte growth factor, SF/HGF) is a multifunctional polypeptide growth factor that plays an important role in tumor proliferation, angiogenesis and invasiveness. 扩散因子(肝细胞生长因子)(SF/HGF)是一种多功能的生长因子,与肿瘤细胞的增生、血管生成、侵袭性密切相关。 短句来源 Results Recombinant cytokines, such as gamma interferon(IFN-γ), hepatocyte growth factor/scatter factor (HGF/SF), and oncostatin M(OSM) not only induce KSHV lytic cycle replication, but also stimulate Rta promoter activity in latently infected HUVECs. 结果包括干扰素-γ(IFN2γ)、肝细胞生长因子P扩散因子(HGFPSF)及制瘤蛋白M(oncostatinM,OSM)在内的重组细胞因子不仅可诱导HUVEC中潜伏感染的KSHV发生溶解性周期复制,而且能增强Rta启动子活性。 短句来源 Objective: To investigate the role of scatter factor (SF) in the development of human breast cancer and the relationship with the biological characteristics of human breast cancer. 目的:探讨扩散因子(SF)在乳腺癌发生发展中的作用及其与乳腺癌生物学行为之间的关系。 短句来源 更多
 离散因子
 Objective: To explore the influence of scatter factor/hepatocyte growth factor (SF/HGF) on the growth and transmission of hepatocarcinoma SMMC 7721 cells by SF/HGF cDNA transfection. 目的　通过离散因子／肝细胞生长因子（scatter factor／Hepatocyte growth factor，SF／HGF）cDNA转染肝癌SMMC7721细胞来探讨SF／HGF对肝癌生长和转移的影响。 短句来源 Objective To study the function of hepatocyte growth factor/scatter factor(HGF/SF) in the (proliferation) of colorectal cancer cells. 目的研究肝细胞生长因子/离散因子(HGF/SF)在诱导大肠癌细胞增殖中的作用。 短句来源 Influence of scatter factor/hepatocyte growth factor on the growth and transmission of hepatocarcinoma SMMC 7721 cells 离散因子/肝细胞生长因子cDNA转染对肝癌SMMC7721细胞生长和转移的影响 短句来源 Objective: To investigate the role of hepatocyte growth factor/scatter factor(HGF/SF) in the invasion of colorectal cancer cells in vitro. 目的:探讨肝细胞生长因子/离散因子(HGF/SF)在大肠癌细胞体外侵袭中的作用。 短句来源 [Objective] To investigate the expression of hepatocyte growth factor/scatter factor (HGF/SF) and its receptor protein c-Met in osteosarcoma cell line MG-63 and HOS, and the influence of HGF on the proliferative and adhesive abilities of the two osteosarcoma cell lines, so as to investigate the possible role of this cytokine during the process of osteosarcoma proliferation and invasion. 【目的】研究肝细胞生长因子/离散因子(HGF/SF)及其受体蛋白c-Met在骨肉瘤细胞株MG-63和HOS中的表达及对瘤细胞生物学行为的影响,探讨HGF/c-Met系统在骨肉瘤细胞生长侵袭过程中的作用。 短句来源 更多

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 scatter factor
 The molecule responsible for this tubulogeniceffect was identified as hepatocyte growthfactor/scatter factor (HGF/SF). Roles of Hepatocyte Growth Factor/Scatter Factor and Transforming Growth Factor-β1 in Mammary Gland Ductal Morphogenesis Detection of oligosaccharide ligands for Hepatocyte growth factor/Scatter factor (HGF/SF), Keratinocyte growth factor (KGF/FGF-7 It is known that stimulation of c-Met via its natural ligand, hepatocyte growth factor (also known as scatter factor, HGF/SF) results in a plethora of biological and biochemical effects in the cell. Growth/scatter factor-producing NBT-II cells are more invasive than cells that do not contain this factor, in orthotopic confrontation assay. 更多
 This paper considers that fatigue scatter factors should be classified into 2 categories for fatigue testing and for theoretical calculation. There is some difference in the values of scatter factors of these two categories.Such difference is primarily due to the difference in both the parameters(standard deviations)and the numbers of testing specimen which are used to calculate the scatter factor.In addition, each of above two scatter factors should be further divided into 2 subcategories:... This paper considers that fatigue scatter factors should be classified into 2 categories for fatigue testing and for theoretical calculation. There is some difference in the values of scatter factors of these two categories.Such difference is primarily due to the difference in both the parameters(standard deviations)and the numbers of testing specimen which are used to calculate the scatter factor.In addition, each of above two scatter factors should be further divided into 2 subcategories: for crack initiation and for crack growth.The difference in the values of these two subcategories is chiefly due to that the standard devia- tions and the objective requirements for the calculation and testing of crack initiation life and crack growth life are different.The values of scatter factors of the above mentioned categories are given based on a number of fatigue test data, and some equations for calculating the scatter factor used in some countries are reviewed in this paper. 本文提出疲劳分散系数可以分为疲劳试验用的分散系数和理论计算用的分散系数。其中每一种又可分为裂纹形成寿命的分散系数和裂纹扩展寿命的分散系数。 本文还对各类分散系数的取值进行了研究,并给出了它们的具体数值。本文同时还对各国所用分散系数的计算公式和取值差别进行了评述。 In this paper, a parameterized lidar equation including multiple scattering is developed . This model is based on four factors, a geometry - extinction factor , an extinction distribution factor, a forward scatter factor and a backward scatter factor . The first two factors characterize the dependence of the multiple scatter component on the extinction coefficient distribution , laser beam divergence and the field of view of the receiver as well as the diameter of the receiver. The last... In this paper, a parameterized lidar equation including multiple scattering is developed . This model is based on four factors, a geometry - extinction factor , an extinction distribution factor, a forward scatter factor and a backward scatter factor . The first two factors characterize the dependence of the multiple scatter component on the extinction coefficient distribution , laser beam divergence and the field of view of the receiver as well as the diameter of the receiver. The last two factors are introduced to denote the dependence of the multiple scatter component on the scattering phase function .This approximation is tested in 241 numerical experiments for ground based and space (or air ) - borne lidars. These experiments cover very wide atmospheric conditions, including 14 atmospheric scattering phase functions . homogeneous and mhomogeneous atmospheric extinction coefficient distributions , and different single scatter albedos ranging from 1 to 0. 5 , and two cases of the ground - based lidar and spaceborne lidar . For multiply scattered lidar returns the standard deviation of the parameterized solution from our Monte Carlo solution is less than 27% in the optical depth range of less than 4 for all experiments . The computing time by our method is only about one-ten thousandth of the one by the Monte Carlo method . The present model is an adequate numerical model to describe multiply scattered lidar returns and to use the returns for determining aerosol or cloud optical properties . 本文提出了一个参数化的多次散射激光雷达方程,该方程基于本文引出的四个因子,即几何消光因子、消光分布因子、前向散射因子和后向散射因子.前两个因子表征多次散射成分对大气消光系数分布、激光的发散角和接收视场角以及接收孔径的依赖关系,后两个因子表征多次散射成分对散射相函数的依赖关系.这个参数化多次散射雷达方程在241个数值试验中得以检验,这些试验包含很宽的大气条件和雷达几何参数,包括14个大气散射相函数,均匀和不均匀的大气消光系数分布,0.5至1之间变化的一次散射反照率,地基和空间站激光雷达两种情形.数值试验表明,在小于4的光学厚度内参数化的解和Monte-Carlo解之间的标准偏差小于27％,而本模式的计算时间比Monte-Carlo方法偏小4个数量级左右.本模式不仅适合于研究多次散射对激光回波信号和激光大气遥感的效应,而且对于考虑多次散射的激光大气探测而言,是一个合适的应用模式. The evolution of Military Specifications for Airplane Strength and Rigidity of USAF and USN is presented. The common Military Specifications-MIL-A-8860 (ASG) was applied in the procurement of USAF and UAN in the 1960's, but USAF and USN promulgated MIL-A-87221 (USAF) and MIL-A-8860B (AS) for the procurement of airplanes in the mid of the 1980' s, separately. The revisions of Military Specifications during the twenty five years are presented. The changes in the requirements such as life, loads spectra, fatigue... The evolution of Military Specifications for Airplane Strength and Rigidity of USAF and USN is presented. The common Military Specifications-MIL-A-8860 (ASG) was applied in the procurement of USAF and UAN in the 1960's, but USAF and USN promulgated MIL-A-87221 (USAF) and MIL-A-8860B (AS) for the procurement of airplanes in the mid of the 1980' s, separately. The revisions of Military Specifications during the twenty five years are presented. The changes in the requirements such as life, loads spectra, fatigue test articles, test schedule, fatigue scatter factors and management are analysed in detail. Finally, the concept of economic life (durability technques), which is only used by USAF, is reviewed. 本文介绍了美国空军、海军飞机结构强度和刚度规范自60年代初共用一套规范到80年代后期各自推出新规范的过程。说明了各个时期规范修订的内容,重点就与寿命和可靠性有关的条款作了较详细的对比分析,诸如寿命概念、载荷环境谱、疲劳试验件、疲劳试验进度、分散系数和部队管理等。最后,对美空军釆用的经济寿命概念(耐久性设计技术)发表了看法。 << 更多相关文摘
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