结构工程

The steel-lined reinforced concrete penstock on downstream dam is a very important kind of non-bar hydraulic structure and is widely used in the hydraulic engineering.

坝后钢衬钢筋混凝土压力管道是非杆系结构中的重要一类，现有的基于弹性应力图形的设计理论和方法已难以满足工程要求。

Domestic large enterprises have built a first-class Technology Center is a national model CAD application engineering units, equipped with scientific and technical information, standards, structure, hydraulic, transmission, electrical and many other professional researchers, with senior professional titles 33 personnel, intermediate professional 404 titles of staff and a number of national patent technology, QY300, QY130H truck crane, QUY200 crawler crane on behalf of the domestic large-tonnage mobile crane the most cutting-edge technology research and development capacity and production levels, filled a number of national mobile crane technology gaps ; have a plate pre-processing, CNC plasma cutting, pentahedral processing center, the Russian landing boring, welding robot and so on more than 2000 sets of equipment, excellent manufacturing processing capacity, improve, reaching the advanced international level; has passed ISO9000 Quality Certification Center of China Quality system certification, access to American FMRC Company Registration Certificate of ISO9001, the leading product of three varieties of four won the national silver, truck crane for 15 years, was named the "National Customer Satisfaction Product", in which truck crane QY16 was the "National Consumer Trustworthy Gold China-made cars,"with the industry's only"°"products.

建有国内大型企业一流的技术中心，是国家CAD应用工程示范单位，设有科技信息、标准、结构、液压、传动、电气等多项专业研究，拥有高级专业技术职称人员33名、中级专业技术职称人员404名及多项国家专利技术，QY300、QY130H汽车起重机、QUY200履带吊代表了国内大吨位移动式起重机最前沿的技术研发能力和生产制造水平，填补了国家移动式起重机多项技术空白；拥有板材预处理、数控等离子切割、五面体加工中心、俄罗斯落地镗、焊接机器人等2000多台套设备，制造加工能力优良、完善，达到国际先进水平；已通过中国质量认证中心ISO9000质量体系认证，获得美国FMRC公司ISO9001注册资格证书，主导产品三个品种四次荣获国家银质奖，汽车起重机连续15年被评为"全国用户满意产品"，其中QY16汽车起重机获"全国消费者信得过国产车金奖"，为同行业唯一"金榜题名"产品。

And combining finite element method and periodic boundary conditions,this article has provided the solution process for asymptotic homogenization equation and the predicting effective mechanics properties method in engineering.

本文利用渐进均匀化理论，详细叙述了求解具有周期性细观单元结构的复合材料有效力学性能的方法，并结合有限元理论和周期性边界条件，给出了求解渐进均匀化方程的过程，为实际工程问题提供了预测材料力学性能的方法。

The restraint of parallelism and perpendicularity of conventional structures was eliminated. The system calibration and measurement process are simple, and easy to be realized in engineering.

该测量方法去除了传统测量结构的平行度和垂直度的约束，系统标定和测量过程简单，工程上容易实现。

With the structure of bearing perpendicularity and level load in the construction of tall buildings, shear wall will possess lateral resistance capacity on the one hand, and on the other hand it will avoid higher cost.

剪力墙作为承受垂直和水平荷载的结构，在高层房屋建筑中，既要发挥它具有足够的抗侧能力，又要克服其工程费用较高的缺点。

This paper describes a technique of introducing foreign gene into pla nt cells and the principles of the high-voltage discharge gene gun and its key s tructures. The velocity of the macroprojectile are measured with high speed phot ography.

本文介绍了一种用于植物基因工程领域的外源基因导入技术和高压放电基因枪的工作原理及关键结构，采用高速摄影法获得了射弹的运动速度。

By means of the new method in this paper, the 3-D photoelasticity analysis results of a bridge have been obtained, which well agree with the results of finite element method analysis.

由本方法通过对大型桥梁工程结构的三维光弹性应力分析，其结果是合理的，与有限元计算进行比较，二者符合良好。

The microstructure of the scaffold was observed under photomicroscope and scanning electron microscopy,and the in vitro degradation time,permeability,tensile-strength,porosity,shrinka...

实验结果显示：支架中的成纤维细胞、脂肪细胞及组织纤维间质完全去除，胶原纤维得到了松散，并维持其原有的天然三维网络多孔结构；该材料透水汽性处于3000g.m-2.d-1左右，适合创面恢复；体外降解时间处于25～50h之间，并可根据需要调整工艺条件控制降解时间；拉伸强度介于10.20～11.50MPa之间，具有良好的拉伸强度；收缩温度介于70～85℃之间。上述结果表明该材料已解决了猪脱细胞真皮基质渗透性差、降解速度过慢的缺点，并且其透气性和拉伸强度高、降解性优良且可控，符合组织工程支架材料的要求。

The usual method of testing concrete may test and destruct a phototype only once and can not define the position,scope of drawbacks of concrete.It also can not demonstrate the extent of structure damaged by the method.Nondestructive testing can abandon these shortcomings.So it is valued and applied in the engineering practice.

常规的混凝土检测采用破损检测，它只能对同一试件进行一次测试并损坏试件，而且无法检测出混凝土内部缺陷的位置与大小，也不能判断结构物遭受破坏的程度等，而无损检测方法可避免这些不足，因此在工程实际中日益得到重视和应用。

Structural content phut attacks water problem is issue of a kind of complex coupling drifting solid, have wide project application perspective.

梗概： 结构物砰击入水新问题是一类复杂的流固耦合新问题，具有广泛的工程应用前景。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐