查询词典 mechanical damage

For different silvicultural measures, the mechanical properties of Pinus sylvestris plantations were measured and analyzed. The results showed that the effect of silvicultural measures on many mechanical properties of Pinus sylvestris Plantations were not significant..In order to increase the mechanical properties of wood, growth-promoting and then get the better structure building lumber and glued lamination board, the stands on south slope or at the down of slope, and with density of 1.5m×1.0m, properly thinning could be selected. Results of this study can provide a theoretical base and good guidance for oriented breeding of Pinus sylvestris plantations.

摘 要：对不同培育措施的人工林樟子松木材力学指标进行测试和分析，结果表明：不同的培育措施（初植密度、间伐强度、坡向、坡位）对樟子松人工林木材的绝大多数力学强度指标有显著的影响，可选择阳坡、坡下、1.5m×1.0m、轻度间伐林分进行定向培育，来提高木材力学强度性能，从而加快林木生长，培育高产、优质的结构、建筑用材及胶合板材林。

The present invention provides a container comprising: a semi-enclosed container body including a tubular structure having two open ends and a bottom panel enclosing one end of the container body, the other end of the tubular structure opposite from the bottom panel forming a substantially continuous outwardly-extending peripheral flange; a lid for selectively converting the semi-enclosed container to a closed container; and a closure means for sealing the lid to the container body, the closure means comprising a mechanical interlocking seal and a slideable mechanical closure for sealing the mechanical interlocking seal.

本发明提供了一种容器(10)，它包括：半封闭的容器主体，包括具有两个开口端和一底板的空心结构，该底板封闭容器主体的一端，与底板相对的空心结构的另一端形成大致连续的向外延伸的周边突缘(25)；一个盖(40)，用于选择性地把半封闭容器转变成封闭的容器；和封闭装置(30)，用于把盖密封到容器主体上，该封闭装置包括机械互锁密封元件、和用于对机械互锁密封元件进行密封的可滑动的机械封闭元件(36)。

In carpet tufting process, the mechanical properties of tuft needles restrict the raising of the spindle's speed and also influence the vibrational property of the entire mechanical system of a tufting machine. However, the kinetic characteristic of the needles greatly depends on the mechanical design of the driving mechanism.

地毯簇绒过程中簇绒针的力学和运动性能制约了主轴转速的提高，影响着整个机械系统的振动特性，而簇绒针的运动性能直接取决于传动机构的设计。

This text aims at the problems in mechanical principle course , and puts forward that it must starts off from desalinating the specialty and strengthening the foundation, and confirms mechanical principle overall situation position and action in person of ability cultivates and breaks the fetter of teaching program , and quickens the mechanical principle course reformation

就《机械原理》课程存在问题，提出必须从淡化专业，加强基础出发，确定《机械原理》课程在人才培养全局中的地位和作用，以打破教学大纲束缚，加快机械原理课程改革。

After dialyzing for 10～20 min, SNP at a concentration of 1 μmol/L increased the induced responses to innocuous mechanical stimulation and decreased those to noxoius mechanical stimulation. The induced responses to both innocuous and noxious mechanical stimulations were all decreased after dialyzing the same dose of SNP for 20～30 min. The decrease was shown within 7～15 min dialysis when SNP was used at a concentration of 20 μmol/L.

脊髓深层神经元透析1 μmol/L SNP， 10～20 min后，非伤害性机械刺激诱发的反应增强，伤害性机械刺激诱发的反应减弱；透析20～30 min后，伤害性和非伤害性机械刺激诱发的反应均减弱；透析20 μmol/L SNP 7～15 min内伤害性和非伤害性机械刺激诱发的反应均降低。

The misdiagnosis to mechanical trouble comes from misjudging mechanical states, inaccurate diagnosis data, unreliable data, incorrect diagnosis reasoning, etc. The information properties of mechanical state play an important role in diagnosis.

对机械状态的误诊断是对机械状态的一种歪曲反映，误诊断原因是多方面的，包括诊断数据的不准确性、诊断依据的不可靠性、诊断推理的不合理性等。

PAA/PVA IPN hydrogels were prepared by a sequential method by which acrylic acid firstly. polymerizes and cross-links in PVA/water solution with UV irradiation,then PVA physical cross-linked hydrogels are formed in cross-linked PAA networksby freezing-thawing. The orthogonal test design method was used to optimize theexperimental conditions based on the mechanical and swelling properties of thehydrogels. The effect of the PAA and crosslinking agent contents on the microscopicmorphology of the PAA/PVA IPN xerogel was investigated by transmission electronmicroscopy, and on the mechanical properties of the hydogels was studied bymeasurements of mechanical properties.

针对水凝胶强度、生物相容性和刺激响应性的需要，选择了以PVA和PAA为复合水凝胶的基本分子结构；采用顺序IPN方法制备PAA／PVA IPN水凝胶，即将单体丙烯酸与PVA溶液共混，AA经紫外光辐射聚合交联在PVA溶液中形成PAA化学交联网络，再经冰冻—解冻循环过程在PAA网络内形成PVA物理交联网络。

3D-CTM (Coupled Thermo-Mechanical Forming Simulation) software for precision forging process of aero-engine blade was developed. The key technologies of 3D coupled rigid-viscoplastic thermo-mechanical FEM simulation of blade forging process were studied systematically. By using the remeshing method of contracting from the boundary to the inner, new mesh system from old distorted mesh system can be obtained. A method of modifying the position of nodes touching on the die according to its original normal was proposed to avoid "dead lock" problem due to uncontinuity of normal of scatted die meshes. The pseudo-static iterative algorithm was used to simplify the coupled thermo-mechanical computation. In particular, formulations to determine relaxation factor β was established for rigid viscoplastic FEM adopting penalty function method, and an improved cubic factor rapid algorithm derived from these formulations was proposed by combining with the advantage of advance and retreat search method.

采用基于边界构形的内缩法，实现了三维畸变网格的重新划分；提出了初矢修正法对触模节点的位置进行修正，解决了由于离散的模具网格的法矢不连续造成的&死锁&问题；采用准静态迭代法简化了速度场和温度场耦合计算过程；特别是针对减速因子β的选取，建立了适用于三维复杂成形过程刚粘塑性罚函数法有限元三次因子法的计算公式，并结合进退搜索法提出了改进的三次因子快速算法，提高了模拟计算效率和稳定性，在此基础之上，开发了面向叶片精锻过程的三维刚粘塑性热力耦合有限元模拟分析系统(3D-CTM)，系统的可靠性得到了圆柱体镦粗的验证。

Regarding to the Mechanical wave on Physics teaching, the traditional method usually fail to offer a direct and clear description and demonstration on the effectiveness of Mechanical wave, for this reason the MathCAD software has been adopted, with the various functions the MathCAD software offers, such as calculation, function chart drawing and cartoon designing, men can describe and demonstrate exactly how the Mechanical wave transmits, intervenes and superposes, and define and research the Doppler effect.

物理学在处理机械波的教学过程中，传统方法读其现象的描绘和演示不直观也不方便，现利用MathCAD提供的强大数值计算、函数图像创建和快速灵活的动画设计功能对机械波的传播、干涉和迭加进行了精确描述和动画演示，并对阻尼

First, the computation theory of the anti-sliding pile has been researched including interaction between the pile and tho landslide, the mechanical model of the pile and the calculation method of the internal force of the pile with prestressed anchor cable. Second, the internal force status, the mechanical computation model and the design method of the foundation beam with prestressed anchor cable have been analyzed. Finally, by the example, engineering instance and the geology mechanical model test, the main results and conclusions deduced from the thesis have been compared and validated.

论文首先对抗滑桩的相关设计计算理论进行了研究，包括抗滑桩与边坡岩土体的相互作用，抗滑桩的力学计算模型以及预应力锚索抗滑桩的内力计算方法；其次对预应力锚索地梁的受力状态、计算模型以及设计方法进行了分析研究：最后结合工程实例和地质力学模型试验对相关结论进行了分析比较、验证。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。