双螺旋的

For satisfying to process to keep a mother line, arc mother line, whole convex degree, half convex degree, ligarithmic curve cone, cylinder roll son of demand, ability according to design whet to submit have already corresponded form noodles of spiral lead a round, spiral lead Gun, double the song lead Gun, three convex Fengs to lead Gun, and arc plank and other similar of work piece etc..

为满足加工直母线、圆弧母线、全凸度、半凸度、对数曲线圆锥、圆柱滚子的需要，能根据设计磨出具有相应形面的螺旋导轮、螺旋导辊、双曲导辊、三凸峰导辊、以及圆弧支板以及其他类似的工件等。

Based on this property, by solving a series ODEs we construct a two-parametric family of helicoidal surfaces under cubic screw motion with prescribed mean curvature or Gauss curvature and solve an open problem left by Beneki.

基于这一点，当螺旋面的平均曲率或Gauss曲率为给定光滑函数时，本文选取伪正交标架，使得两类螺旋面的平均曲率和Gauss曲率的表达式相对简化，通过求解一系列的非线性常微分方程，即可确定一族生成曲线，从而最终确定平均血率或Gauss曲率为给定光滑函数的双参数族螺旋面，并在这一过程中解决了Beneki等人留下的一个公开问题。

The detective rate, the diagnose accordance rate, detection rate located coincident rate and absorbent gland metabasis rate were compared.

结果 B超、气钡双对比造影、结肠镜、螺旋CT扫描对病灶的发现率分别为64.5%、92.6%、94.1%、88.9%，诊断符合率分别为50.6%、83.6%、89.6%、80.2%，B超与另三种检查比较，病灶发现率、肠癌诊断符合率有显著性差异；肿瘤部位检查符合率四种检查无差异；B超和螺旋CT的淋巴结转移检出率有显著差异。

Results among 15 cases, eight cases of Loose bodies about right keen joint;three cases of left keen joint;three cases of both keen joint ;one case of pilosity dissociates bodies;two cases with joint effusion ;six cases with soft tissue swelling.16-slice SCT with 3D reconstruction demonstrated stereoscopic morphology of normal and lesions clearly with MPR correctly demonstrated details and density ,shape and size of lesions.conclusions Sixteen-slice SCT with 3D and MPR techniques can provide valuable spatial information of diseases in bones and joints of wrist and foot which correlated well with that of pathological anatomy .

结果 15例患者中，右侧膝关节游离体8例，左侧3例，双侧3例，多发游离体1例；其中2例伴有关节积液，6例有关节周围软组织肿胀。16层螺旋CT的3-D图像可清晰显示游离体的立体形态，MPR图像则可以多平面，多角度地观察游离体的大小、形态、密度、位置，对病变显示满意。结论多层螺旋CT重建能提供骨关节病变非常有价值的空间关系信息，其表现接近病理解剖，临床应用价值大，有利于临床医师选择治疗方案、制订手术计划。

A new method, step-search-diameter ,is presented to calculate the diameter of undirected double-loop networks G.

提出新的无向双环网络G的直径求解法———分步法；并得到一种新的直观图———螺旋环，研究了螺旋环的性质；给出了无向双环网络的直径d的显式公式；给出了N，s都固定的直径算法；在N固定，且2≤r

Objective To analyze the contrast enhancement appearances and patterns on dual phase helical CT scans in 21 cases with hepatic hypervascular metastases, and to discuss the value and pitfall of helical CT in diagnosing hepatic hypervascular metastases.

目的 分析 2 1例共 6 3个富血供肝转移灶在螺旋CT双期扫描中的表现，探讨螺旋CT在该病诊断中的价值和限度。

Purpose To evaluate the diagnostic value of thin-slice enhancement CT with hypotonic water-filling method in gastric carcinoma.

目的：探讨低张水充盈薄层螺旋CT增强扫描对胃癌的诊断价值。方法：对32例胃癌患者进行低张气钡双对比造影及低张水充盈薄层螺旋CT增强扫描，并与术后病理相对照。

Upon binding ATP or a nonhydrolyzable analog such as AMPPNP, RecA undergoes an allosteric transition into a high-affinity DNA-binding form. When RecA combines with dsDNA to form RecA-dsDNA nucleofiliment, it can unwind dsDNA and change the dsDNA structure.

在ATP或其类似物的辅助下，RecA可以直接与双股DNA结合而形成核丝，并将双股DNA加以解螺旋，并改变双股DNA的结构。

After analysis and research on the physical property and dehydrating specialty of the brown alga acid, it is determined that the single-and double screw dehydrators are in series connection used for the continual dehydration of the brown alga acid and the relevant dehydrating equipment is developed.

本文介绍了在分析褐藻酸的物性及脱水性能后，研究褐藻酸一次连续脱水达到含水率65%~70%的技术，进而确定采用单螺杆螺旋脱水机和双螺杆螺旋脱水机串联，进行褐藻酸的连续脱水，并研制了相应的脱水设备。

By utilizing three benezenemulticarboxylate derivatives (H2chdc, H2aip, NaH2sip), we obtain 12 coordination polymers. Especially, compelexes 1 and 2 are based on one-dimensional ···OHInOHIn···chains as building units, while complex 3 is based on double four-ring [In8(μ2-O)4(μ2-H2O)8]16+, complex 4 is based on trinuclear In3(μ3-O)(CO2)6, complexes 11 and 12 are both based on nested bistranded helices.

选择了三类取代苯羧酸配体： 2，5-二羟基-1，4-对苯二甲酸(2，5-H2chdc)； 5-氨基间苯二甲酸(5-H2aip)； 5-磺酸基间苯二甲酸钠盐(5-NaH2sip)和InCl3反应合成了十二个配位化合物：其中1、2以···OHInOHIn···链为构筑单元， 3以双四元环[In8(μ2-O)4(μ2-H2O)8]16+为构筑单元，4以棱柱状三核铟In3(μ3-O)(CO2)6为构筑单元，而11、12以嵌套的双股螺旋链为构筑单元。

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