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In order to study the structure of face contacted blocks,the movability of three kinds of the face contacted block has been studied by vector analysis ,the scope of key blocks is dwindled, and the base for further study of the structure face contacted blocks has been established.

为研究面接触块体结构，运用矢量分析法判别了大同采场上覆岩层常见的 3种面接触块体的可动性，缩小了找关键块体的范围，对面接触块体结构的深入研究奠定了基

The invention relates to a nut (10) comprising an outer body (16) with an axial passage (22), an inner body which can be movably placed in the passage along an axial direction and which is divided along said axial direction into at least two jaws (18, 20), each jaw bearing an inner thread segment (24) on its radial inner surface, first guiding means (26) located on the outer body, as well as second guiding means (30) located on the jaws and co-operating with the first guiding means so that the jaws are radially displaced towards the exterior when the outer body is displaced in the unscrewing direction relatively to the inner body et radially displaced towards the inside when the outer body is displaced in the screwing direction relatively to the inner body.

本发明涉及一种螺母(10)，它包括：一个带轴向通孔(22)的外体(16)；一个内体，位于通孔(22)中，可沿轴向移动，并且沿所述的轴向方向至少分成两个滑块(18、20)，它们各自在其径向的内表面上具有内螺纹部分(24)。在外体上有第一导向装置(26)，同样滑块上有第二导向装置(30)，第二导向装置与第一导向装置共同起作用，所以，当外体相对于内体沿旋松方向作相对滑移时，滑块径向地向外滑移，并且，如果外体相对于内体沿拧紧的方向滑移，则滑块径向地向内滑移。

The parent element is divided into four sub-areas,and the natural coordinates of the vertices of the sub-areas and the shape functions are used to calculate the temperature at the vertices of corresponding sub-areas in real coordinate system.

首先把母元等分成4个子块，然后利用子块顶点的自然坐标和单元的形函数，求出实际单元中对应子块的顶点温度，利用子块顶点温度判断是否有等值线通过。

For wedge grafts the cuts are made at a right angle to the crest. Jones[1] et al. have found that full-thickness iliac grafts harvested with a power saw are stronger than those harvested with an osteotome, presumably because of less microfracturing of bone with the saw.

与髂嵴成直角可切取楔形骨块，Jones[1]等发现以动力锯切取的全厚髂骨块的强度要高于骨刀切取的骨块，可能是因为应用骨刀切取对髂骨块可造成更多的显微骨折。

For wedge grafts the cuts are made at a right angle to the crest. Jones[1] et al. hae found that full-thickness iliac grafts harested with a power saw are stronger than those harested with an osteotome, presumably because of less microfracturing of bone with the saw.

与髂嵴成直角可切取楔形骨块，Jones[1]等发现以动力锯切取的全厚髂骨块的强度要高于骨刀切取的骨块，可能是因为应用骨刀切取对髂骨块可造成更多的显微骨折。

It underwent the collision event of the Southern China plate with the North China plate at early Triassic, overthrust napping event of continental, and continental spread structure event beginning at Cretaceous. I...

它已经历三迭纪早期华南陆块与华北陆块的碰撞事件、大陆逆掩推覆构造事件及后期白垩纪早期开始的大陆伸展构造事件，是我国华南陆块与华北陆块之间的重要过渡单元。

Thermal effect on the equivalent spring constants of double-clamped beams with two kinds of mass arrangements including central mass and side mass were studied by theoretical analysis and finite element simulation.

通过理论研究和有限元仿真分析了热效应对两种不同质量块布局的双端固支梁的等效弹簧系数的影响，两种质量块分别布局为质量块与梁对称布置和质量块位于梁平面一侧布置。

And according to the directions, the Bandelet blocks were classified into two sorts: the Bandelet blocks with geometrical directions and the Bandelet blocks without geometrical directions, and the different characteristics of the two sorts of Bandelet blocks were analyzed in order to distinguish the noise and signal, and the weak contrast features and the strong contrast features.

根据图像增强方向将Bandelet块分为两类：有几何方向的Bandelet块和无几何方向的Bandelet块，并分析了这两类Bandelet块系数的不同特征，从而区分出噪声和信号、清晰边缘和脆弱边缘。

During the process of the fore mentioned analyses, some tentative works as follows were done.(1)On the basis of the fundamental of spatial analytic geometry, the basic method for displaceable block searching was put forward and the relevant program was written. With this program one can easily search out all the displaceable blocks and omitting of blocks, which is very common in searching blocks manually, can be avoided.(2)The coefficient of stability of blocks with failure mode II-2(that is, sliding on a single sliding surface, but confined by near intersecting line )was deduced.(3)The multi-cavern effect of Laxiwa underground caverns was studied on the assumption that all of the caverns were full face tunneled at the same time.(4)The stability classification scheme of rock mass surrounding large scale underground caverns was established. In addition to inherit the merits of the method of engineering geological

在完成上述工作的过程中，本论文主要在以下几个方面进行了一些探索：①基于空间解析几何原理，提出了块体搜索的基本思路并编制出相应的程序，基本实现了块体搜索的自动化，既大大缩短了块体搜索时间，又能防止因人工搜索引起的遗漏；②推导出Ⅱ-2型(单滑面滑动，但受侧限面约束)块体的稳定性系数计算公式；③以数值模拟方法论证了拉西瓦地下厂房洞室群全断面一次开挖时群洞效应的具体特点；④以岩体质量、开挖效应、群洞效应和次生灾害效应为评价指标，建立了&大型地下洞室群围岩稳定性分类&方案；该方案既继承了水电行业规范&围岩工程地质分类&法的优点，又综合考虑了大型地下洞室群的工程特点。

Methods:Twelve patients with fresh transverse fracture of patella were reviewed in the study.The hemarthrosis,blood clot,fracture fragments and soft tissues between them were cleared with arthroscopy.With the help of C-arm X-ray,the fracture was reduced with manipulation method.After the articular facet reached anatomical reduction,two Kirschners were inserted percutaneously from proximal end to distal end of fracture to fix the fragments,Two hollow screw were put along the approach of Kirschners,and tension band fixation was performed with the shape of "8".Results:All the patients were followed up averagely 12.4 months.

12例新鲜髌骨横骨折患者通过关节镜清理关节腔内的血凝块、碎骨块和骨折块之间嵌顿的软组织，直视下观察骨折复位情况以指导骨折复位固定，在C形臂X线透视下帮助骨折复位，关节镜观察关节面解剖复位后，经皮从近折端向远折端平行打入2枚克氏针固定骨折块，顺克氏针拧入2枚中空螺钉，拔除克氏针，顺螺钉空心导入钢丝，行张力带&8&字固定。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。