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For the composites with a low content of TiC particle, the rupture manner was mainly the nucleation of cavity and following ductility splitting fracture. But for the composites with a high content of TiC particle, the cracking and decohesion of TiC particles were the main rupture mechanism. For the composite containing a middle TiC content, the rupture mechanism consisted of the above two styles, but the former was the dominating mechanism and the later was the subordinate mechanism.

对TiC体积分数较低的钢基复合材料,拉伸过程中TiC颗粒界面上的孔洞形核及随后塑性撕开机制是其断裂失效的主要机制;对TiC体积分数较高的钢基复合材料,拉伸过程中TiC颗粒的开裂及脱落是其断裂失效的主要机制:对TiC体积分数介于上述两者之间的钢基复合材料,拉伸过程中TiC颗粒界面上的孔洞形核及随后塑性撕开机制在其断裂失效过程中占主要地位,而TiC颗粒的开裂及脱落占次要地位。

First of all, this paper introduces the whole design project and interrelated knowledge about Non-destructive detection, ultrasonic detection, and Phased-Array ultrasonic detection Then the paper depicts the principle of Phased-Array focus and abstracts a set of math model and feasible arithmetic on the base of the real parameter of the system. Put forward several problems that exist during the course of system development and program. Introduce some measures of distinguish that are often used in non-destructive detecting and echo wave crest. Then I depict one of the measures in detail that used in the course of non-destructive detection, which is the way of distinguishing whether defects exist or not. Then provide part core program to realize it. This paper also provides main flow chart through analyzing how main control program controls different parts to make the whole system more effective.

然后在文中以较大的篇幅,描述了相控阵聚焦的原理,并根据该系统的实际参数,抽象出一套数学模型和可行的算法,在此基础上提出了在系统开发过程及编程实现过程中存在的一些问题;介绍了在无损检测中缺陷的分类和对回波峰常用的识别方法,详述了系统开发过程中使用的其中一种识别方法,即判别是否存在缺陷的算法,并给出实现之的部分核心程序;详述主控程序如何控制各部分并协调各相关软件的工作,使整个系统发挥最高效能,并给出主要设计框图和程序。

By using molecular dynamics simulation, the deposition process of cold spraying nano-scale Au particles on Au (001) surface and the morphological changes of the surface layers of the substrate and the particle are described, in which the many-body potential was used to calculate the interatomic force between the atoms.

通过对Au纳米粒子在Au基体上沉积过程的分子动力学模拟,再现了冷喷涂中Au纳米粒子在Au基体上沉积的过程以及粒子和基体表层的形貌变化;在撞击过程中,基体的局部区域有熔化现象,通过计算粒子原子进入基体表面层的数量及粒子与基体间的最终接触面积,探讨了影响喷涂粒子沉积过程的主要因素。

In terms of continuum mechanics and nonequilibrium irreversible thermodynamics theories, compressible Leonov constitutive model is derived to describe large recoverable elastic strain development in non-isothermal flow of compressible viscoelastic melts. It is tempting to specify the model and then compare it to basic rheological tests in the hope that such a model will yield a good description of the nonlinear viscoelasticity of polymer melts.

注射成型是聚合物的主要成型加工方法之一,成型过程中聚合物要经历熔体流动和固化等非等温、非平衡过程,由于聚合物的粘弹性,流动过程中建立的剪切应力、法向应力和大弹性形变在固化过程中不能完全松弛,在制品中形成残余应力和取向,对制品的机械和光学性能有着重要影响。

The method comprises the steps: S402: an inverse process multiplexing for a terminal to transmit channels; S404: CRC verifies a statistical module and judges whether CRC verified calculation in the inverse process is right and after relevant processing is taken according to the results of the judgment, the right circumstances in the CRC verification in the reverse process are added up; S406: the terminal outputs the link quality of the transmission channels according to the stastical results of the verified statistical module in the CRC; S408: RNC sends out request message for counting, and the terminal makes response to the counting in pre-set conditions and feedbacks the link quality of the transmission channels; S410: after receiving the counting response of the preset quantity, the RNC counts the link quality given feedback by the terminal and confirms whether to regulate power allocation of the signal channel loading MBMS according to the statistical results.

本发明提供了一种采用外码增强技术反馈链路质量的功率分配调整方法包括:S402,终端进行传输信道复用的逆过程;S404,CRC校验统计模块判断逆过程中的CRC校验计算是否正确,并且在根据判断结果进行相关处理后,统计逆过程中CRC校验的正确情况;S406,终端根据CRC校验统计模块的统计结果输出传输信道的链路质量;S408,RNC发送计数过程请求消息,并且终端在预定条件下响应计数,并反馈传输信道的链路质量;S410,RNC在接收到预定数量的计数响应后,统计终端反馈的链路质量,并根据统计结果确定是否调整承载MBMS的信道的功率分配。

The temperature of viscosity transition is different in different thermal processes.

在不同的热过程中,粘度发生转折变化的温度不同,在升温过程中,发生在850℃左右,在过热100℃和无过热的降温过程中,分别发生在750℃和650℃左右。

Precursors of sulfates and alkali halides prepared in co-deposition process were mixed homogenously, annealed at high temperature and then formed CoO and NiO fibers, XRD, XPS, Raman and SEM were used to characterized the samples, the growth of these fibers might be a special LS mechanism: soluble precursors in molten salt decomposed gradually to form initial crystal nucleus and succeeding particles adhered to these nucleus and grew anisotropically in the special high temperature fluent medium, the higher decomposition temperature and solubility of the precursor are two key factors in this method, which are in favor of a longer growth process and result in larger sizes of the final metal oxides crystals.

以共沉淀方法生成硫酸盐与碱金属卤化物融盐的均匀混合前驱物,在高温下退火制备出了CoO和NiO的晶须,以XRD和XPS等对成份进行了分析,SEM分析了形貌特征,研究了不同前驱物热分解特性,认为本方法是一种简单的LS生长机制:可溶性前驱物于融盐中热分解后逐渐析出成核,后续的粒子附着在核上,在融盐环境下沿一定方向作准一维生长,其产物形貌之不同源于硫酸盐的高分解温度和在融盐中的可溶性,导致晶体生长过程中成核过程与生长过程竞争的结果对一般前驱物结果的偏移。

Objective: The experiment will to observe: 1、the compound composed of carriers and rhBMP-2 excels or is similar to autologous iliac crest in posterolateral intertransverse spine arthrodesis in rabbits, 2、it may eliminated thd nonuions, 3、To explore the biologic process in spine arthrodesis and the role that accelaterated spine arthrodesis, 4、the roles of HA in spine fusion, by those compounds are used in posterolateral intertransverse fusion in rabbits.

目的:本实验通过rhBMP-2、HA复合物在兔子腰椎后外侧横突间融合的过程,观察了解:(1)rhBMP-2复合物在兔子腰椎后外侧横突间融合中,其作用能否优于或至少与自体髂骨相同,能否取代自体髂骨,免去取骨术。(2) rhBMP-2复合物的应用能否消除不融合的发生。(3)进一步了解脊柱融合的生物学过程,及rhBMP-2在脊柱融合生物学过程中所起的作用。(4)探讨HA在脊柱融合中的作用。

In order to verify the accuracy of heat transfer coefficient,2D nonlinear finite element axisymmetric model is established by the means of finite element software MSC.Marc, which is utilized to simulate the transient temperature field coupled with phase transformation process and nonlinear synthetic surface heat transfer coefficient of several typical steels in the different quenchants.

Marc作为模拟平台,建立了淬火过程二维非线性有限元模型,模拟淬火过程中的瞬态温度场,在模拟过程中以多种常用钢在不同淬火介质中的非线性表面综合换热系数为边界条件,同时耦合了相变过程的影响。

In addition, the blank holding force that is required to avoid wrinkle and rupture during conical part deep drawing is researched. The necessity of reasonable blank holding force in pressing is expounded. From the view of mechanical analysis, the wrinkle critical condition of side-wall is derived for the first time by the stress state of side-wall, the main deformation region on blank. According to the critical condition of plastic instability for flange, side--wall, corner of punch on blank, The blank holding force in conical part deep drawing is divided into four different regions within its forming figure. The basic principle of reasonable blank holding force during stamping is summarized and provided. The mathematical model of reasonable blank holding force that avoids the wrinkle and rupture is established and verified by the finite element numerical simulation and the grid experiment method. The result shows that it is accurate and reliable.

此外,本文还研究了圆锥形件拉深成形过程中,随着拉深变形过程的进行,毛坯为避免产生起皱、破坏缺陷而对压边力的需求情况,阐明了圆锥形件拉深成形过程中压边力合理变化的必要性;由毛坯主要变形区悬空锥壁部分的受力变形情况,从力学分析的角度,首次推导得出了圆锥形零件悬空锥壁起皱失稳的临界条件;并根据主要变形区法兰、悬空锥壁及凸模圆角部分的塑性失稳临界条件,在其成形范围图中,将圆锥形件成形过程中的压边力划分为四个区域;总结并提出了圆锥形件成形过程中压边力合理变化的基本原则;建立了防止起皱、破坏缺陷产生的压边力合理变化的数学模式,并得到了有限元数值模拟及网格实验法的验证,证实了理论分析结果的正确性和可靠性。

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Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书,王祥生,李德昌。安徽省首次发现嗜群血蜱。

Chapter Three: Type classification of DE structure in Sino-Tibetan languages.

第三章汉藏语&的&字结构的类型划分。