查询词典 specific gravity

This project studies the scale-dependent deformation behavior of the metal matrix composite, the void nucleation and void growth mechanisms at the micron/submicron scale. The main results are:(1) In prophase, growth and coalescence of the void embedded in the graded matrix are analyzed in detailed;(2) Based on the infinite solid model containing a micro-void, coupling effects of the void shape and the void size on the void growth are studied carefully, the results show that it seems to exist a critical equivalent void radius, which is associated with the material length. When radius of a microvoid is close to or smaller than the critical void radius, the micro-void growth rate is essentially eliminated;(3) The coupling effects of the particle shape and size on the mesoscopic stress fields within the particle and matrix are also investigated by introducing the conception of inclusion/matrix interfacial energy. The results show that the stress concentration factors within the particle and on the matrix/particle interface are also strongly size-dependent,so the void nucleation mechanism is size-dependent.(4) By employing a specific orthogonal curve coordinate frame and a 'kernel function' conception, a 'unified method'solving the spheriodal and spherical void problems is suggested; by this unified method, size-dependent plastic potentials of the porous materials containing the spheriodal or spherical voids are obtained, which extend the traditional Gurson model for the spherical void and GLD model for the spheriodal voids to the micron scale.(5) Based on the RVE model containing the spheriodal or spherical particles, the influences of the particle shape and size on the size-dependent mechanical behavior of metal matrix composite are studied.

中文摘要：本项目对金属基复合材料在微细观尺度下的尺度相关变形行为、孔洞形核及长大的机理和模型进行了研究，取得了如下主要结果：1）在前期研究中，探讨了基体的梯度分布对孔洞长大和聚合的影响；2）基于含孔洞的无限大体模型，探讨了孔洞形状和孔洞尺寸对其长大的耦合作用，结果表明：可能存在一个与材料特征长度相关的临界孔洞尺寸，当椭球孔洞的等效半径小于临界孔洞半径时，孔洞的长大受到明显抑制；3）通过引入基体/夹杂界面能的概念，分析了夹杂尺寸、夹杂形状对材料细观应力场的耦合影响，结果表明：颗粒内部和界面上的应力集中因子强烈地依赖于夹杂的尺寸和形状，因此，孔洞的形核机理是尺寸相关的；4）采用一种特殊的正交曲线坐标系和引入"核函数"的概念，"统一"地得到了含椭球和球形孔洞的材料的尺寸相关塑性势，它将传统的Gurson球形孔洞模型和GLD椭球孔洞模型推广到微尺度范围；5）基于含椭球和球形夹杂的体胞模型，初步研究了夹杂形状、夹杂尺寸对金属基复合材料尺寸相关力学行为的影响。

The use of regularization method for the restoration of blurred images of the algorithm, resulting in an image, and then adding noise to the input of specific parameters of regularization to restore its image.

详细说明：利用正则化方法对模糊图像进行恢复的算法，产生一幅图象，然后加入噪声后对特定的输入正则化参数其进行图象恢复。

Methylation is negative correlation with genetic transcription , and the mechanism is probably as follows : directly interfere the combination of specific transcripton and recognition site of each promoter ; mediated transcription inhibition by change the construction of chromatin; induced gene silencing by combination of methylation site and transcription inhibition. P16 gene is also called multiple tumor supresser gene , which is the best easily to methylate in the anti-oncogenes. P16 gene locates in 9p21 of mankind-chromatosome , and it's total length is 8.5kb .

甲基化与基因转录呈负相关，其机制可能是[3]：直接干扰特异的转录子和各自启动子识别位点的结合；通过改变染色质结构，介导转录抑制；甲基化DNA位点直接与转录抑制子结合，诱导基因沉默。p16基因又称为多肿瘤抑制基因( multiple tumor suppressor 1 ，MTS1) [4] ，是肺癌中最易发生甲基化的抑癌基因，该基因位于人类染色体9p21上，全长8.5kb ，由两个内含子和三个外显子组成。

Although there are methods for accurately detecting a specific methylated gene, this in no way proves causation of cancer.

虽然有许多方法可以对一种特异性的甲基化基因进行精确检测，但还不能证明它就是引起癌症的原因。

Currently, we are developing a more global methodology for fishing out tissue- and developmental stage-specific methylated sites.

现在，我们更进一步发展出更能广泛地在基因组中寻找甲基化片段以期待能够找出更多的组织特异性和不同时其的甲基化片段。

You might also want to create your own tools to gather metrics that are specific to your software.

您也可以创建您自己的测试工具来收集您产品特定的数据。

MATLAB applications, through redeployment of C++ language interface Mex, can be achievable in the MATLAB environment for the specific hardware interface signals.

而通过MATLAB应用程序接口Mex调用C++语言，可实现在MATLAB环境下对硬件端口信号的读写。

According to the actual field and specific requirements, it could be designed as single or multiple mezzanine, generally 2～3 layers.

根据实际场地和具体要求，可设计成单层或多层阁楼，一般为2～3层。

There is no specific cause for the condition and it is thought to stem from a number of potential factors from micro-organism invasion to an unhealthy lifestyle .

有没有具体的原因，条件，它被认为是干从一些潜在的因素，从微观生物入侵，以一种不健康的生活方式。

The second procedure is microanalysis. The purpose for this procedure is to let students get more specific and detailed information.

第二环节是微观剖析，目的在于使学生对语篇有更具体、更详尽的了解，产生深层理解能力。

Through comparing with the results by simulation to study the effects of theprojectile"s final velocity, the angle of rotation and the ballistic trajectory"s migration withdifferent projectile"s rotating speeds, different target"s moving speeds and differentpenetration angles.

通过比较数值模拟的结果来研究不同弹头转速、目标速度、侵彻角对侵彻过程中弹头最终速度、翻转角度和弹道偏移的影响。

I love stationery and all the accoutrement of writing.

我爱文具以及所有的书写的工具装备。