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The mechanical property testing shows that the seamless PLLA tubes perform excellent radial strength,which indicates that the mechanical properties of biodegradable stents made of these tubes was supposed to be excellent.PLLA and its composites were first used in preparing seamless tubes as antecedency of laser-cut biodegradable coronary stents in china.Finite element analyses of the biodegradable coronary stent model indicate the explorative design basically meets the requirement of reasonable and applicable stents.There is not such kind of research yet in domestic.Optimum laser-cuttting parameters of CO2 laser was cauculated based on experiential formula,within it,biodegradable coronary stents,especially those with complex structure would be manufacutured from seamless tubes quickly by laser microprocessing with high consistency to the design model.The processing efficiency of the CO2 laser demonstrated in experiential formula by us will play an important guiding role in manufacturing biodegradable stents by laser-processing.Our stents that ascribed to laser-cutted,slotted tube stent are proved to be biodegradable, self-expandable and good biocompatible,basically reach the international level on the aspest of manufacturing procedures and design.

研究结果表明:壳聚糖改性材料综合性能优于纯PLLA,更适合于作为可降解冠脉支架的原材料;自主设计的探索性自膨胀管状闭环型可降解冠脉支架的性能符合冠脉设计要求,设计、验证生物可降解冠脉支架模型的研究在国内还未见报道;制备的改性PLLA无缝管的力学性能优越,可通过激光切割获得冠脉支架,这是国内首次采用聚乳酸材料来制备通过激光加工出可降解冠脉支架的无缝管;二氧化碳激光器加工精度能达到加工要求,加工出来的血管支架名义设计与实测值误差小,实现了冠脉支架、尤其是带有复杂外观设计冠脉支架的快速化、规范化加工,对二氧化碳激光器加工聚乳酸材料的效果研究在国内外属于首创,获得的经验公式对日后的深入研究有重要的指导意义;制备的支架为激光切割管状闭环型冠脉支架,支架外观设计、支架加工手段、支架的性能都基本接近国际水平,支架样品符合设计的理念,可以实现自膨胀功能。

For early-stage brest cancer, neoadjuvant therapy has down-staging effect and is helpful for chemosensitivity evaluation and individualized therapy.

对于早期乳腺癌,新辅助化疗可使原发肿瘤降期以提高局部切除的可行性,并可早期评价化疗敏感性从而指导个体化治疗。

First, this paper, in the field of intrinsic geometry, studies the geometric problems on garment design, as well as applies the frame and semi-geodesic coordinates to prove the fundamental theorem of being a developable surface.

文中首先在内在几何学的层次上,研究了服装设计所涉及的几何学问题,应用标架与半测地坐标方法证明了曲面成为可展面的基本定理,研究了可展面的分类及其性质,考虑到服装三维几何造型的需要,证明了组合式可展面各组成片相切连接条件的命题,作为构造可展面的理论依据,证明了单参数平面族的包络面必为可展面的命题,在此基础上发展出服装几何造型的"刮大白"方法以及相关的三种构造可展面的解析方法。3D→2D的变换是三维服装CAD的重要内容之一,其几何学实质是曲面的定长映射,文中总结了定长映射即可展面在平面上展开的基本准则,在这一准则的指导下,结合服装设计与相关领域的要求,讨论了可展面在平面上展开的解析方法与数字方法,上述内容确立了服装设计几何学的基本框架。

In the first step of a design, performance estimation is a guider to developing a coarse grained reconfigurable architecture.

在设计初期,估计粗粒度可重构结构的性能,对粗粒度可重构结构设计具有指导意义。

At first, the conception of test task was proposed to explain the evident difference of parallel efficiency of test tasks. Then, the guideline of parallelism was developed, to weigh the parallelizability of different test tasks, as well as guiding the configuration of instrument source in the parallel test system. At last, with an example, the rationality of parallelizability and the practicability of parallelism were proved.

首先根据测试任务组的并行测试效率不同的现象,提出了测试任务可并行性的概念;然后给出了衡量可并行性的可并行度指标,用以定量地指导并行测试系统开发过程中仪器资源的配置;最后通过应用实例验证了可并行性概念的合理性、可并行度指标的实用性。

Develop and apply producibility and supportability guidelines and utilize formal tools such as design for manufacturability/assembly and maintainability analysis tools to improve product designs.

发布和使用产品可制造性和可支持性的指导方针,使用正式的工具如DFM/DFA和可维护性分析工具来改善产品设计。

Use the Marxist person harmonizes with nature to develop the thought to re- examine just modern mankind's civilization of be placed in the confused stage, the especially natural ecosystem environment was use by us a kind of way that depends on the excessiveness to consume the natural capital to seek the development, can get: Want the real realization Sustainable Development, can't develop the way to look for and can keep on to develop the mode from the economy alone, but must with the Marxism Sustainable Development thought for leading, carry out to develop completely.

用马克思主义人与自然和谐发展思想来重新审视正处于困惑阶段的现代人类文明,特别是自然生态环境被我们用一种依靠过度消耗自然资本来谋求发展的方式,就可以得出:要真正实现可持续发展,就不能单独从经济发展方式去寻求可持续发展模式,而必须以马克思主义可持续发展思想为指导,实现全面发展。

Under the guidance of systematology, this paper take advantage of a research method of combining development analysis and comparative analysis qualitative analysis and quantitative analysis, theoretical analysis and positive analysis. In the background of urban construction, it is intended to build a frame about study of city's sustainable development from symbiosis theory.

在研究过程中,本文借鉴了城市经济、可持续发展、共生理论等领域已有的研究成果,以系统思想为指导,采用定性分析与定量分析相结合、归纳与演绎相结合、理论分析与实证分析相结合等方法,以城市化为背景,建构了我国城市可持续发展过程中建立共生关系的研究框架。

The method and technology of GIS were introduced, instructed by new economy and sustainable development theory, colligated correlative knowledge, used CASECNUM to quantify sustainable development and to discover the evolvement and the causation which can make us understand our country and province complexion scientifically and constitute reasonable decision, it is significative to accelerate the sustainable development for our country.

本文引入GIS方法和技术,以新经济理论和可持续发展理论为指导,综合相关学科知识,应用基于新经济增长理论的可持续发展评估模型对可持续发展进行量化研究,揭示可持续发展程度的演化过程及变化原因,使我们能够科学认识我国国情、省情,制定科学合理的发展决策,对促进我国向可持续方向发展具有重大现实意义。

Hongrui company can provide various of modified enginnering plastics more than 100 species,including modified PA66,PA6,PP,PBT,PE,ABS,etc.;can provide many types of engineering plastic wares,including slipper,gear,plate,power,bottle,etc.;also can provide many service,including blendenting,mixing color,selecting suitable material,molding,infecting.etc.

目前鸿瑞公司可提供改性工程塑料PA66、PA6、PP、PC、PBT、PE、ABS等七大类百余个品种;可提供工业用尼龙滑块、滑轮、齿轮、板材、粉末、罐瓶等多种工程塑料制品;还可提供塑料粒子及塑料制品的配色、混色、选材、制模、注塑工艺指导等多项技术服务。

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推荐网络例句

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严,以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆,把帆卷起,系住。

Therefore, positively advances the interest rate marketability reform is one of current our country finance reform important tasks.

因此,积极推进利率市场化改革是当前我国金融改革的重要任务之一。