螺旋

The mathematical model of ruled helicoids on torus is constructed and two expression methods of ruled helicoids are discussed.

基于圆柱螺旋面和圆环螺旋线的形成原理，构建了圆环直纹螺旋面的数学模型，讨论了圆环直纹螺旋面的两种表示方法。

In order to get the 'three parameters changeable' formulaof the nonlinear spring design engineering, spring diameter, spring wirediameter and helix angle changed coinstantaneous based on spring designtheory that wildly used before is considered, the model results is showedsuccessfully in Unigraphics Solutions software by using Ugopen/APItechnology.

本文中通过考虑弹簧螺旋角的影响，在原有弹簧设计理论的基础上，通过同时改变弹簧中径、簧丝直径和螺旋角三个螺旋弹簧设计参数的方法，得到了满足刚度性能要求的&三变&螺旋弹簧的设计方法，并在三维CAD软件UGII中成功的实现了这种弹簧的三维实体数据模型的建立工作。

Based on the stress analysis to spired axis mechanism,in the aspect of sliding part which smoothes through alveolus intersection, theresearch of parameters optimization, about the middle alveolus of spired axis andthe dimension of sliding part, has been studied. To the problem that the reverseportion at the both sides of spired axis lashed fiercely and fraies quickly, thearticle finely analyses the best curve of alveolus when adding cushiony spring atthe both sides.

在对螺旋轴机构进行受力分析的基础上，从滑块顺利通过齿槽交叉点的要求方面，对螺旋轴中间段齿槽和滑块的尺寸进行了参数优化分析；针对螺旋轴两端曲线齿槽反向段在高速工作时冲击大、磨损快的问题；从减少滑块在齿槽反向段运动的冲击方面，比较分析了圆弧、抛物线、三角函数等曲线作为螺旋轴齿槽反向段曲线的加速度，提出了较优的(来源：ABCab论bf文网www.abclunwen.com)反向段曲线。

In Polymer, helix is a quite universal configuration Recent experiments show thatsome polymers such as bacterial flagellar filaments can form bistable helices in ionsolutions, which means that left handed helix and right handed helix can coexist in thesame environment The mechanism of this phenomenon has not been explainedsatisfactorily.

在高分子中，螺旋是一种很普遍的高分子组态。近来实验发现，一些高分子，如细菌鞭毛丝，在离子溶液中能够形成双稳态螺旋，即左螺旋与右螺旋在相同的条件下能够同时存在。

The batch seeded isothermal desupersaturation experiments of SPM in aqueous solution were carried out and the overall crystal growth kinetics parameters were determined by the nonlinear optimization techniques. Assuming that the volume diffusion rate at growth is equal to the mass transfer rate at dissolution under the same conditions, the two-step crystal growth rate parameters can be determined. At the fow supersaturation, the surface integration rate is proportional to relative surface supersaturation.

通过测量螺旋霉素均相成核动力学，获得了表面能的值，估算出表面熵因子的值在1.41～1.56之间，从而可以推断出螺旋霉素晶体生长的表面反应速率同表面相对过饱和度成线性关系，这种生长机理同第四章得到的结果是相吻合的；利用估算的表面熵因子的值，把螺旋霉素晶体看作为简单的立方科瑟尔晶体，根据能量最低原理，对螺旋霉素的晶体生长进行了模拟。

Based on membrane extraction and helical tube technique, the mass transfer performance of some membrane modules with a different helically wound hollow-fibre was studied with the system of 30%TBP-water and phenol as the solute. The effects of two phase flow rates, geometry of the membranes on mass transfer coefficients were investigated.

在对中空纤维膜萃取以及螺旋管技术进行充分调研的基础上，选择水-苯酚- 30 %TBP煤油为实验体系，溶质由水相萃取到有机相，在不同结构的单束螺旋状中空纤维膜器中研究了螺旋管纤维膜管内外流速以及螺旋管结构等因素对传质系数的影响。

Results we found positive labeling for both anp and nos in different types of cells including the spiral modiolar artery, stria vascularis, spiral limbus, spiral ligaments, basilar membrane, organ of corti, spiral ganglion, and macula sacculi. however, no immunoactivity was found in the reissner membrane and tectorial membrane.

结果 在耳蜗各转螺旋动脉和血管纹，螺旋缘、螺旋韧带和corti器显示双阳性染色，螺旋神经节细胞及囊斑神经上皮细胞膜及轴突nos阳性染色，胞质anp阳性染色；盖膜、前庭膜阴性染色。

In bioconv ertion experiment for spiramycin of No.5 transformant, the bioconversion product was analysed with TLC, bioautography, HPLC and mass spectrum.Results showed that the bioconvert product is propionyspiramycin. Propionyl acylase gene was l ocolized on 0.53 kb insert DNA fragment of recombinant pasmid pLJM95. Analysis result of DNA sequence showed that content of G+C is 68.2% for 0.53kb insert DNA fragment .

以No.5转化子对螺旋霉素进行生物转实验，其转化产物经薄层层析，生物显迹，高压液相色谱及质谱分析表明，与标准丙酰螺旋霉素一致，这说明 No.5 转化子具有将螺旋霉素生物转化为丙酰螺旋霉素的能力，丙酰化酶基因位于重组质粒，pIJM95 0.53kb 插入DNA片段上。

AQP3, 7, 8 distribute in a similar manner which is surrounding the membranous labyrihth, including Cortis organ, inner and outer spiral sulcus, stria vascularis, fibrocytes of the spiral ligament and the spiral limbus, saccular and utricular wall, endolymphatic sac and spiral ganglion.

AQP3，7，8三者的分布类似，在螺旋神经节和包绕膜迷路的组织中表达，包括Corti's器、内外螺旋沟、血管纹、螺旋韧带纤维细胞、螺旋缘、椭圆囊壁、球囊壁、内淋巴囊等。

Additionally, cross section curve of helix wire, contact radius, clearance angle, width and ratio in wires same layer were obtained.

为了掌握轴向载荷下螺旋钢丝的变形特性以合理设计钢丝绳，推导了螺旋钢丝轴应变显式表达式，给出了螺旋钢丝截面曲线表达式和同层螺旋钢丝正好满足接触时钢丝的半径及接触半径、间隙角、间隙值和间隙率表达式。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了