机械作用

The effects of high-energy ball milling including the fining and mechanochemical on the carbothermal reduction nitridation of alumina were investigated.

研究了高能球磨氧化铝的细化和机械力化学作用及球磨对碳热还原反应合成氮化铝的影响。

For example, manufacturing errors, especially errors of profile and position, assembly errors, nonplanar characteristics of dynamic parameters of components (such as the distribution of mass, inertia forces, etc.), deformation of components, external environments (such as the temperature, the field of the gravity), varying of the condition and so on, all that will disturb the planar constraints, and make it uncertain.

根据广义约束的观点，由于机械的工作受到各种内部和外部约束（包括几何约束、运动约束、动力约束及工作环境条件的约束等）的综合作用，实际上要保证这些约束精确的平面性是不可能的。

The advantages of dual grafts for bridging defects are as follows:(1) mechanical fixation is better than fixation by a single onlay bone graft;(2) the two grafts add strength and stability;(3) the grafts form a trough into which cancellous bone may be

双侧植骨桥接骨缺损的优点包括：①机械固定作用比单侧贴附植骨更好；②双侧植骨可增加强度和稳定性；③双侧的植骨可形成一骨槽，可在其中压紧松质骨；④与单侧植骨不同，双侧植骨在愈合过程中可防止挛缩的纤维组织危害移植的松质骨。

The adantages of dual grafts for bridging defects are as follows:(1) mechanical fixation is better than fixation by a single onlay bone graft;(2) the two grafts add strength and stability;(3) the grafts form a trough into which cancellous bone may be packed; and (4) during healing the dual grafts, unlike a single graft, preent contracting fibrous tissue from compromising transplanted cancellous bone.

双侧植骨桥接骨缺损的优点包括：①机械固定作用比单侧贴附植骨更好；②双侧植骨可增加强度和稳定性；③双侧的植骨可形成一骨槽，可在其中压紧松质骨；④与单侧植骨不同，双侧植骨在愈合过程中可防止挛缩的纤维组织危害移植的松质骨。

BACKGROUND: Guided tissues regeneration has been successfully used in the treatment of periodontal diseases by using biocompatible membrane to prevent tooth epithelial cell growing towards root and to facilitate the formation of a certain gap which is favorable for periodontal membrane cells to occupy the surface of the root, thereby to rebuild the peridental structure.

背景：引导组织再生已成功地应用到牙周病的治疗，应用生物相容性膜，依靠其机械屏障作用能阻止牙龈上皮根向生长，并形成一定的间隙以利于牙周膜细胞占据根面，进而重建牙周结构。

AIM: To evaluate the plerosis function of microwave after the machine injury of facial nerve.

目的：探讨面神经机械损伤后微波的促修复作用。

The above-mentioned results illustrate: the mechanism of pseudobulbar palsy treated with nape needle was possible about brain plasticity after stroke, for example, it could relieve spasm of muscle, recovery muscle strength, facilitate pharyngeal muscle to move coordinated; formate long term protention with uninterrupt mechamism stimulations , reconstructe damaged reflex arch ; accelerate blood circulation, ameliorate ischemia and anoxia; influence metabolism of angeogenesis growth factors, improve angiogenesis and protect neurons.

项针治疗脑卒中后假性延髓麻痹的疗效肯定，其机理可能主要与缓解肌肉痉挛，恢复肌力，促进咽部肌肉的协调运动；对病变部位长期不断的机械刺激，形成长期强化作用，使受损反射弧得以重建；促进血液循环，改善病变局部缺血缺氧状态；影响血管生成生长因子的代谢，促进血管生成，保护神经元等，脑卒中后脑可塑性改变有关。

During the last decade, the presumed etiology of glaucoma has changed from a pured pressure concept to a combined mechanical and vascular theory.

近10a来，青光眼病因假设已经从单纯的眼压方面进步到机械和血管联合作用学说。

H2 has the tendency of accelerating synthesis. And the mechanism is that H2 can not only accelerate the refinedness of the powder particle of Ti, make the novel surface of fracture clean, but also enhance the activation of Titanium.

结果表明，在5种不同球磨环境下用Ti粉和活性炭粉都能合成TiC，其中在H2环境下的合成速度最快。H2对TiC的机械合金化合成具有加速作用，其机理是H2不仅能促使Ti与活性炭粉末细化，使断裂的新鲜表面保持清洁，而且能使Ti的活性增强。

In this paper, two assemblies of special test equipments have been designed and fabricated by authors in our laboratory: namely Catalyst Molding Process Analyzer and Catalyst Mechanical Process Tester. These new skills are developed for the dynamic studies on whole mold forming process and crushing process of Fe-Cr WGHS catalyst pellet. Based on the orthogonal experimental design, the effects of some factors during the forming process of solid catalyst, such as predensification proportion, calcination time, calcination temperature and content of graphite on the mechanical strength of catalyst pellets are systematically examined, and the molding conditions have been optimized. Based on the experimental data, the relationship between catalyst density and forming pressure are educed, and the physical significances of some related parameters are described. The parameter of macro scopic elastic moduls has been suggested to character the mechanical properties of molding catalyst. The effects of molding pressure on mechanical properties of catalyst pellets are discussed, and results show that there exists a optimal molding pressure for the ideal mechanical properties: when over-high or over-low pressure is applied, the specific surface area and side crushing strength of catalyst pellets will decreased. The "rebound effect" will be undermined by the unsuitable pressure maintain process, resulting in the apparent decrease of mechanical strength of catalyst pellets.

本研究通过自行设计制造的催化剂模压成型过程分析仪（Catalyst Molding Process Analyzer， CMPA）和催化剂力学性质测试仪（Catalyst Mechanical Properties Tester， CMPT），以Fe-Cr系高温变换催化剂片剂为研究对象，对成型过程和受压破碎过程提供了全过程动态研究的新手段；本研究利用正交实验设计方法考察了固体催化剂成型过程中诸因素（包含预密致比例、煅烧时间、煅烧温度和石墨含量等）对催化剂成型体强度的影响，并对成型条件进行了优化；根据实验结果，关联确定了固体催化剂成型过程中的密度－压力关系式，并对方程中诸因子的物理意义进行了描述；提出了一种利用宏观弹性模量来表征成型催化剂的力学性质的方法；研究讨论了成型压力对催化剂成型体强度性质的影响，结果表明：对于催化剂成型体的强度和比表面性质，成型压力存在着一个最佳值，过高的成型压力会导致比表面积和侧压强度的降低；不适当的成型压力的维持时间会破坏&压力回弹&作用，造成催化剂成型体的机械强度明显降低。

Do you know, i need you to come back

你知道吗，我需要你回来

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。