By utilizing the in-use equipment,we focussed on the settlement of the difficult technical problems as too thick,strong rigidity and poor spinnability of the letus root silk.

Therefore,the clamp girder is featured with strong rigidity and small deformation,and clamping force is fully imposed on the carbon blocks,which lighten the weight of crane and enhance its reliability and prolong service life.

The excellences of high pure Al2O3 are stabile in chemical capability,good at biological consistent, of biological inertia, strong rigidity, good atwearability, and less than 1~2 scalar in the ratio of abrasion compared withother composites, which have been greatly applied as structure and syntheticmedicine materials.

GaN is a nitride semiconductor material with high meltpoint, strong rigidity, large direct energy band gap and chemically stable properties inair. It has a wide applied potential and a good market prospect at light emitting diodes(LEDs), blue light laser and ultraviolet (UV) detector.

The frame of phased array antenna is characterized with high accuracy and strong rigidity, large size and high process cost, and the processing of this frame long stands a difficult problem.

In cases of strong rigidity inhibition of crossed extensors was caused only by strong flexion (1-2 kg).

Thurston) for which a strong rigidity result is proved-similar to the one for complete hyperbolic manifolds in dimension exceeding two.

We introduce and briefly discuss strong rigidity, because it is in a sense a simpler property and may be easier to use in giving explicit construction.

Our matrices satisfy a somewhat stronger property, we will explain and call "strong rigidity".

We apply these results to ergodic theory, establishing new strong rigidity and superrigidity results for orbit equivalence relations.

It is an important topic to construct piecewise smooth surface interpolating to 3D scatted data not only in CAGD but also in finite element analysis and other fields. Although quadratic surface(cones,ellipsoids, etc. )has been widely used in the body shape design of airplane and CSG,it has got very little use in the interpolation to 3D scatted data.The main reason is that the quadratic surface has strong rigidity which makes it difficult to piece two quadratic surface patches together with even only C1...

It is an important topic to construct piecewise smooth surface interpolating to 3D scatted data not only in CAGD but also in finite element analysis and other fields. Although quadratic surface(cones,ellipsoids, etc. )has been widely used in the body shape design of airplane and CSG,it has got very little use in the interpolation to 3D scatted data.The main reason is that the quadratic surface has strong rigidity which makes it difficult to piece two quadratic surface patches together with even only C1 continuity.In this paper, a method of constructing piecewise quadratic surface interpolating to given 3D scatted data with VC1 continuity is presented.The methods based on a theorem given in the paper,which shows how many conditions are required to guarantee that two quadratic surface patches have VC1 cpntinuity on a plane. At first,for the given 3D data (xi,yi,zi,), a convex triangulation is constructed (only this case is considered) and a normal vector at each vertex is estimated. Then, a quadratic surface patch is defined over each space triangle, which satisfies the interpolating conditions at the three vertexes of the triangle. Because any two adjacent space triangles are uncoplane,there forms a "gap" between these two surface patches.The third step, three quadratic surface patches which are jointed with VC1 continuity are constructed to fill the "gap" .The fourth step, suitable boundary conditions are given to get reasonable continual equations. Finally, we obtain the required surface expressions by solving the continual equations and finding the parameter regions.This kind of surface needs a little information at each vertex and can becalculated conveniently.

The pyramidal folded-plate type space trusses structure is used for the roof of Beijing Collegiate Gymnasium. It has the merits of stronger rigidity, less internal forces and more rational interior space. But its boundary thrusts bring about unfavourable influences to the lower support structure. This paper presents the roof structure design using the four corner tubes and four horizontal trusses in-between to conform with the architectural requirements with big cantilever eaves and to act as thrust resisting...

The pyramidal folded-plate type space trusses structure is used for the roof of Beijing Collegiate Gymnasium. It has the merits of stronger rigidity, less internal forces and more rational interior space. But its boundary thrusts bring about unfavourable influences to the lower support structure. This paper presents the roof structure design using the four corner tubes and four horizontal trusses in-between to conform with the architectural requirements with big cantilever eaves and to act as thrust resisting system around the roof to absorb thrusts from space trusses. Dynamic analysis shows that the response of this type of roof structure to vertical vibration is fairly great and much attention has to be paid in design.

series of nematic liquid crystalline polymer azomethine liquid crystalline copolyether of lower phase transition temperature are synthesised with mesomorphic radical of strong rigidity and soft non-mesomorphic radical.It's properties of phase transition temperature and liquid crystalline phase are investigated by thermal platform polarizing microscope,differential scanning calorlmetry(DSC)and X-ray diffiration.The influences of non-mesomorphic radical on its phase transition temperature and crystaline...

series of nematic liquid crystalline polymer azomethine liquid crystalline copolyether of lower phase transition temperature are synthesised with mesomorphic radical of strong rigidity and soft non-mesomorphic radical.It's properties of phase transition temperature and liquid crystalline phase are investigated by thermal platform polarizing microscope,differential scanning calorlmetry(DSC)and X-ray diffiration.The influences of non-mesomorphic radical on its phase transition temperature and crystaline phase are discussed,the relation between its phase transition temperature and compositions of copolymerization are discussed as well.