But almost none studies analysis and design principle about quasiliquid device by the numbers . for providing theory guidance for quasiliquid device design and improving capability and reliability of quasiliquid fuzes , taking experience formula of loose object orifice flowage of loose object mechanics , this paper constitutes three type quasiliquid safety and arming device mathematics models by force analysis 为了为引信准流体机构设计提供理论指导，提高准流体引信性能及其可靠性，本文以散体力学散粒体孔口流动经验公式出发，结合典型准流体机构具体结构，通过受力分析，建立了离心力驱动、弹簧力驱动和离心力与弹簧力相结合驱动三种典型准流体延期解除保险机构地解除保险过程数学模型。
The percentage of polymorphic sites , degree of genetic polymorphism and genetic distance were compared and the phylogenetic tree was constructed by neighbor - joining method . the partial mitochondrial 16s rrna gene was amplified by polymerase chain reaction ( pcr ) and the pcr products were directly sequenced after purified . these sequences , together with the homologous sequences of another trichiuridae species lepidopus caudatus obtained from genbank were used to analyze nucleotide difference and to establish a upgma phylogenetic tree by means of biological informatics 汝us价ay1830 )各12个个体进行rapd分析，对比多态位点比例、遗传多态度以及遗传距离，并构建neighbor - join吨系统树;通过pcr扩增出线粒体165rrna基因，纯化后直接测序，利用生物信息学方法进行序列分析和核昔酸变异比较，结合ge红bar止中大西洋叉尾带鱼( lepid (护脚caud玫tuseuphrasen1788 )同源序列构建u甲cm叭系统树。
Robustness of our results was confirmed by high bootstrap support of all nodes in the trees . this result contradicts the batrachia hypothesis ( a salamander + frog grouping ) , and is consistent with bolt ' s hypothesis ( 1991 ) basing on the morphological data . the result was also supported by previous molecular studies based on mitochondrial and nuclear rrna data 这个结果与蛙类假说是相矛盾的，与bolt ( 1991 )中国泽蛙线粒体基因组结构及种群系统地理学研究在形态学基础上提出的绒蝶类和蚓螺类为姐妹群关系的假说相一致，并得到建立在线粒体和核trna基因数据基础上的许多分子研究的支持。
A new sand constitutive relation connecting the relationship between stress and strain with the stress path is set up to reflect these phases , at the same time the phenomenon of shear contraction , shear dilatation and unloading shrink are taken into account in this constitutive relation . extracting the merit of the nonlinear model and plastic - elastic model , it is simple and effective 该模型借鉴了散粒体模型的计算思路，利用广义塑性模型中的一些简化计算概念，形成了自己的计算模式，能较好地反映四个特征区域的应力应变关系和试验当中出现的剪胀和剪缩现象。
This dissertation presents a hypoelastic constitutive model with four material constants in describing the mechanical behavior of granular materials under loading . analysis results of the model have good coincidence with those of triaxial experiment of the standard sand under different relative density . the model can describe the contractant and dilatant phenomena of granular materials 提出了一种含4个材料常数的亚弹性本构模型，来描述散粒体在加载时的力学行为，本模型的分析结果与不同相对密度下标准砂的三轴实验可较好地吻合，能反映散粒体的剪缩、剪胀现象，还对如何用三轴实验数据来确定这4个材料常数，给出了适宜的计算方法。
The number of organella increases greatly and especially division of the mitochondria is very active . follicle cells begin to surround oocyte . organella such as mitochondria , endoplasmic reticulum , golgi gody all take part in the formation of yolk granules and yolk granules accumulate to yolk body from the beginning to the end 卵黄发生的卵母细胞细胞质中线粒体、内质网、高尔基体等细胞器均参与卵黄野粒的形成，而且形成的卵黄颗粒相互愈合，从卵黄形成期早期一直延续到后期。
Based on the condition of static equilibrium , the equation of active granule pressure is derived the height of the action point of the granule pressure on the backface of the linear retaining wall is larege than one third of height of the wall and distribution is nonlinear 摘要通过对直线挡墙背散粒体取微分单元，根据静力平衡条件，推导出直线挡墙主动散粒体压力沿墙高的分布的公式，证明直线挡墙主动散粒体压力沿墙高呈非线性分布，合力作点的位置大于而不是等于或小于墙高的三分之一。
Abstract : according to analysis of drying characteristics of granular product , the paper dscribed analytical solutions on a single grain with two falling rate drying stages during corresponding falling rate drying periods of deep - bed drying process the changes of drying and physical parameters ， and their corresponding relation were discussed . a mathematical model was developed and analytical result was presented by computation . the potential application of this analytical solution was alsogiven in this paper 文摘:通过对颗粒物料的干燥特性分析,给出单一粒体降速干燥具有二段性的物料在深床干燥过程各降速阶段的解析式；讨论诸干燥参数及物性参数的变化和相互关系，建立数学模型,采用计算方法,示出解析结果以及这一解析方法的应用。
2 . an up - dated method was employed to purify tumv in this research . using the protease k method , we acquired the viral genome - rna . a pair of specific primers was designed and synthesized based on the nucleotide sequences of tumv coat protein genes reported before and rt - pcr was used to clone the cp genes of the six tumv isolates 应用改进的芜菁花叶病毒的提取方法从病叶中提取病毒粒体，应用蛋白酶k法从病毒粒体中提取病毒rna基因组，根据已报道的tumv的cp基因序列，设计并合成了一对特异引物，利用rt - pcr法克隆了6个分离物的外壳蛋白基因，与克隆载体puc19连接后通过热激法转化大肠杆菌dh5 。
