In addition , the effects of intense shear forces of ultrasound make the surface of particles much more smooth . therefore , this uniform surface may be expected to provide an idea substrate for functional modification . ( 2 ) preparation and properties of pmaana / pbs composite particles the spherical pmaana / pbs composites with core - shell structures were prepared by polymeric microgel template method 在此基础上,还对得到的pmaana cds有机无机复合微球进行超声处理,结果发现,超声所具有的强的剪切作用对微球的表面进行了类似“打磨”的处理,这种表面均匀的微球可为进一步的功能化提供合适均匀的基质。
After the examination of pcr , one non - fluorescent cell clone had the same result as the plasmid ploxifn - a 1000bp product ; another non - fluorescent cell clone showed a 500bp product , a deletion reaction was thought to happen between the two lox sites in the genome under the reaction of cre recombinase so that the gfp gene and neo gene etc were cut 经pcr检测后,有一个不发光细胞克隆扩增出了与对照质粒ploxifn相同的约1000bp的条带,表明发生了替换反应;另一个不发光细胞克隆认为是在cre重组酶的作用下其内部自行发生了剪切作用,剪切了gfp基因,从而只扩增出了载体序列和一个lox位点的约500bp的条带。
This paper is consisted of two major parts : one deals with the general working performance of the fmghp by setting up mathematic model and developing computer procedure , getting the datum related to the capillary flow and heat transfer , analysing the working characteristics of fmghp in different working temperature , heat flux and inclination angle etc . in this part , the prediction of capillary and boiling limit are also included . the other major part studies the flow and heat transfer characteristics in the micro - film region formed by the meniscus attached on the metalic fin in the micro rectangular groove . investigations on the influence of width of groove and other factors on heat transfer in this region have been made . the importance of this micro - region in the heat transfer of the entire heat pipe has been unveiled . the heat transfer characteristics gotten by this research could be used in design and application and also optimization of this kind of fmghp 本文在大量查阅现有国内外文献的基础上,总结并综合前人有关微槽平板热管理论研究方面的成果,对单面刻有槽道的微槽平板热管进行了较为深入和细致的研究。本文的研究共分两大部分,其中第一部分考察了该型热管的整体工作表现,通过建立数学模型和开发相应的计算程序,得到了热管内部毛细流动和传热的数据,分析了热管在不同工作倾角、不同加热热流以及不同工作温度等情况下工作特性的变化规律,考察了汽液界面上的剪切作用对热管传热量的影响,并且进一步在理论上预测了该型热管的毛细和沸腾极限。
The p33 , which is considered to be the precursor of p27 and coordinate to e . coli tgi expressed phl , is expressed and excreted at lag phase . then a splicing process is supposed occurred during the exponential phase resulting in production of mature phospholipase p27 . the p32 p31 p30 , p29 are believed to be intermediates of this splicing process 但在菌体生长进入稳定期后,仅产生p60和p27两种成熟的磷酯酶,其中p33为p27的前体蛋白,与phl应为同种蛋白,经剪切作用产生一系列的中间产物p32 、 p31 、 p30 、 p29 ,最终产生成熟蛋白p27 。
The first phase involves the formation of thrusting and napping towards nww accompanied by extensive igneous activity and mineralization . the second phase corresponds to the development of asymmetrical small fold downwards north and south . the final phase the cenozoic is marked by strong brittle fractures activity resulting in the sharp heave of the landform of xiaoqinling aera 太华群内的褶皱及南北两侧断裂分析表明,小秦岭燕山期至少经历3期变形,第一期为sse nww向的褶皱变形作用;第2期为南北向正断下滑剪切作用;第3期为脆性正断作用。
This area was controlled by four large - scale faults : south kunlun suture , jinsshajiang suture , bangonghu suture and yaluzangbu suture . this area has undergone polymetamorphism and deformation and at least three periods of magmatism . continuous activities of magmatism , metamorphism were mainly controlled by collision of the terranes _ 1 : 240 - ( ) 220ma ,巴颜喀拉洋壳向昆仑地体俯冲,以昆仑岩带和阿尼玛卿岩带中cag型岩浆侵位为标志;阿尔金剪切作用发生。
In the northern part , the oceanic crust occurring between the bayan har and kunlun terranes started subduction from south to north at about 243 ma , and did not stop until the development of post - orogenic pog - type granite in the bayan har terrane at 220 ma , thus illustrating the orogeny in the form of subduction and collision kept active for over 20 ma 以pog型花岗岩在巴颜喀拉地体内大量生成、在阿尼玛卿岩带中较多出现、在昆仑岩带利金沙江岩带少量出现为标志。期: 160 - 140ma ,断裂系活动;金沙江、东昆仑剪切作用发生;部分岩体动力变质变形。
The stirred fluid and beads have multidimensional circulation motion and self - rotation for the stirrer rotation in the grinding chamber of a stirred media mill . high intensity motion is caused by multi - direction displacement of fluid and beads . the powder is comminuted by compression caused by beads gravity and helical turn for rubbing , impacting and shearing 搅拌磨磨筒中,在搅拌器的搅动下,物料与磨介作多维循环运动和自转运动,从而在磨筒中不断地上下、左右相互置换位置产生激烈的运动,由磨介重力以及螺旋回转产生的挤压力对物料进行摩擦、冲击、剪切作用而粉碎。
With the different loading ratio of parallel to axis and normal to axis direction , damage defects will occur bulking problem . by varying the degree of material anisotropy relative to the loading axis such as poisson ' s ratio and shear modulus , crack growth bulking strain value parallel to or normal to the loading axis is different . the parameters controlling the growth or arrest of the delamination damage are identified as the geometry and the depth of defects and radius of cylindrical etc . at last , it was investigated that the delamination damage is often induced by the tip of matrix damage under higher stress 研究结果表明:壳体筒段受轴向拉伸和内压载荷作用时,轴向和环向载荷的比率不同,母层和子层可能发生拉伸屈曲,也可能发生收缩屈曲,或者同时发生拉伸和压缩屈曲;母层与子层各向异性存在差异,即泊松比与剪切模量不匹配时,将使子层板的边界上承受压缩和剪切作用,当分层达到临界状态则发生屈曲,当母层与子层的各向异性差异越大,则发生分层屈曲的可能性越大;分层损伤的屈曲应变值与子层自身的弹性模量、分层子层的形状、厚度以及圆柱半径等因素有关。
The interaction effects between circular interfacial cracks or rigid line inclusions and a screw dislocation located either outside or inside inhomogeneity under antiplane shear , the electroelastic interaction between a piezoelectric screw dislocation located either outside or inside inhomogeneity and circular interfacial cracks and rigid lines under longitudinal mechanical and inplane electrical loads in linear piezoelectric materials and the elastic interaction between an edge dislocation located either outside or inside inhomogeneity and interfacial crack along a circular inhomogeneity are dealt with in this paper 本文首次对位错与圆形弹性夹杂界面典型缺陷的力、电干涉进行研究,解决了无穷远反平面剪切作用下螺型位错与含界面裂纹或界面刚性线圆形夹杂的弹性干涉问题;无穷远纵向剪切和面内电场共同作用下压电螺型位错与含界面裂纹或界面刚性线圆形压电夹杂的力电耦合效应问题:刃型位错与含界面裂纹圆形弹性夹杂的干涉问题。