可以接近的

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。

Though comparing Canny operator and center B spline dyadic wavelet, the following conclusion is proven in this dissertation: a Center B spline function has tight support and Canny operator hasn't. b Center B spline function asymptotic convergence to Gaussian function and the derivative of Center B spline function asymptotic convergence to Canny operator. c The derivative of fourth order center spline B function is more suitable as a optimal edge detector than Canny operator. d Center B spline function can balance the smoothing and approximation of original data, and the fourth center B spline function is the only optimal solution of two order smoothing problem. e The error between the valve of time-frequency uncertainty of the fourth center B spline function and the lower bound of time-frequency uncertainty does not exceed 0.143% of the lower bound. f The derivative of center spline B function can construct a stability dyadic wavelet and can give a fast algorithm for multiscale edge detection, but Canny operator can do neither.

作者给出了Canny算子与中心B样条二进小波严格的比较证明，得出如下结论：a中心B样条函数具有紧支集，Canny算子不具有紧支集。b中心B样条函数的极限收敛于高斯函数，中心B样条函数的导数收敛于Canny算子。c四阶中心B样条函数的导数比Canny算子更接近最佳边缘检测滤波器。d中心B样条函数比高斯函数更能兼顾对原函数平滑和逼近的折中要求，并且四阶中心B样条函数是二阶逼近问题的唯一最优解。e四阶中心B样条函数的时频测不准关系值与时频测不准关系下界的逼近误差不超过0.143％。f中心B样条函数的导数可以构成稳定的二进小波，存在快速的多尺度算法；而Canny算子不构成稳定的二进小波，无法给出快速的多尺度算法。

He states the technology of F5 company has the the rapiddest rate, largest size and the strongest expansibility, the documentation that put can achieve 2 trillion byte, the memory that he still discloses to the company that F5 company approachs most on the market at present can be offerred at the same time is 20 million byte merely, difference is very big between this.

他表示F5公司的技术具有最快的速度、最大的容量和最强的扩展性，存的文档可以达到2万亿字节，他同时还透露目前市场上最接近F5公司的公司所能提供的存储仅仅是2000万字节，这之间差距是很大的。

My daughter is 30 October, 2002 births, now shift the kindergarten (which is the pre-kindergarten taipans), she also did not learn in kindergarten alphabet and mathematical addition and subtraction, just learning to write the number but she would write their own name and simple Chinese characters, such as the large and small, days, years of age and so on, if she go to school in September next year if her age is close to seven-year-old, and some of the morning to learn that the girls, and some fear that children with schools do not study, I would now like to specifically requested during the summer school teachers taught her spelling, in the summer after first grade directly, I would like to ask the experts would that be feasible?

我的女儿是2002年10月30日出生，现在幼儿园上中班（所在幼儿园大班就是学前班），她在幼儿园还没有学习拼音及数学加减法，刚学习写数字但是她会写自己的名字和简单的汉字，如大、小、天、岁等，如果她明年九月份上学的话她的年龄已接近七岁了，有的说女孩子早上学好，有的又说怕孩子跟不上学校的学习，现在我想在暑假期间专门请学校老师教她拼音，在暑假后直接上小学一年级，请问专家这样可以吗？

The further away I hold my fingers from the nib of the pen the more flexibility I have in rotating the head of the pen to position it at different angles to the page which allows for different writing styles.

一个很具未来性的设计，我喜欢他的外观和在我手上的感觉，我发现我的拇指与食指越接近笔尖，越能控制笔触，而且旋转笔头於不同的角度可以写出不同风格的字。

The nervousness a typist feels, particularly near the end of a page when an error will require retyping the entire page, is eliminated in word processing since corrections can be made one letter, one word, one line, or one paragraph at a time after the page is typed, the word processor making all the necessary format adjustments for corrections automatically.

紧张情绪一打字员的感觉，特别是接近尾声的一个网页的时候，一个错误将需要输入口令整个页面，是消除在文字处理，因为改正，可以取得一信，一个字，一条线，或一个段落的时候，后一页是打字，文字处理机，使所有必要的格式调整，自动更正。

The results of his labor and dedication can be heard on seven titles for Real Music, Beyond the Horizon, Feather Light, Dream Spiral, The Edge of Forever, Winter Magic, Sweet Return and finally, Hilary Stagg ~ A Tribute.

他辛苦和奉献的成果可以Real Music的七个主题中体现出来，超越了界限，轻柔明亮，虚幻曲折，接近永恒，神秘的冬季，甜蜜的回归和Hilary Stagg 的礼物。

The stigmas are near the tips of the upside down umbrella-shaped style. Once the pollinators push their way into the inner chamber, they have a jolly time rolling in the pollen and slurping the nectar.

柱头的位置接近倒伞形结构的尖端(可以参考原始网页的图，左边是一般植物的花，右边是瓶子草的)，当授粉者钻进腔内的时候，它们会在花粉间钻动，啜食花蜜。

A better understanding of such behavior can both guide efforts to educate consumers about the risks associated with perishables that are approaching their expiration dates and help managers implement effective promotional strategies for these products throughout the course of their shelf lives.

对这种行为更透彻的理解可以指导如何使消费者认识到与接近保质期的易变质物品所联系的风险。这也同样能指导管理者们对这些仍在货架上的保质期内的物品如何实施有效的促销策略。

The conclusion provides the theoretical basis for applying appropriate restraining pressure to preventing frost heave in engineering field.

并不需要约束压力大到接近或等于&中断压力&的程度，而可以通过加筋或选择适当的结构形式提供约束压力使冻胀的土体向融土区的方向压缩，利用融土的压缩量抵消部分冻胀量，即可在约束压力较小的条件下，使建筑物发生的冻胀位移大大减小。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。