空心

A Material nonlinear finite element analysis for the cast-in-place reinforced concrete hollow slab that occurs from initial loading, cracking, yielding to failing is carried on. The cracking load, ultimate load, the displacement rules and the principal stress distribution rules of the hollow slab under the vertical loads are obtained. A Material nonlinear finite element analysis for the single span hollow flat-plate floor is also carried on. The function of the concealed wide-flat beams is definite by analyzing the principal stress distribution diagram. The calculating results verify the theoretical analysis and give some important conclusions which are great useful to improve the constructing of the new flat-plate floor.

其次对空心板进行了从加荷、开裂、屈服直至破坏的全过程材料非线性有限元计算，得到了空心板在竖向荷载作用下的开裂荷载、极限荷载及位移和应力分布规律；还对单跨无梁楼盖进行了材料非线性有限元计算，通过分析主应力场明确了柱上暗扁梁的作用；有限元计算的结果验证了以上的理论分析并得到了一些重要的结论，对改进现浇空心板无梁楼盖的构造措施有重要的参考价值。

And by using the initial conditions as well as the end conditions, the dynamic problem is then transferred to a second kind Volterra integral equation about the function of the axial strain with respect to time which can also be solved successfully by the interpolation method. For piezoelectric and pyroelectric hollow cylinders, by following the solving procedure for elastic hollow cylinder and by using the electric boundary conditions, the dynamic problems are transferred to two Volterra integral equations about two functions of time, one is axial strain and the other is related to electric displacement, which can also be solved efficiently and quickly by employing interpolation method. The elastodynamic solutions of hollow spheres, which are made of elastic, piezoelectric and pyroelectric materials, respectively, for spherically symmetric problems are also obtained.

对于弹性空心圆柱，通过引入一特定函数将非齐次边界条件化为齐次边界条件，然后利用正交展开技术，导出关于时间函数的方程，再结合初始条件和端部边界条件，将原问题转化为关于一个时间函数的第二类Volterra积分方程，运用插值法可给出此积分方程的解；对于压电和热释电空心圆柱，利用求解弹性空心圆柱相似的方法，再结合电学边界条件，原问题转化为关于两个时间函数（轴向应变和与电位移有关的函数）的第二类Volterra积分方程组，同样可用插值法来构造相应的递推公式高效地求解此积分方程组。

Compared with the ordinary plate beamless roof, the cast-in-place reinforced concrete spatial core beamless roof has two prominent diversities, one is buries the hollow cylinder in the floor to form the hollow floor in advance, the other is equipped with wide-flat beams between the frame.

和普通平板无梁楼盖相比，现浇钢筋混凝土空心板无梁楼盖有两个突出的不同点，一是在楼板内预埋空心圆筒形成空心楼板，二是在框架之间设有暗扁梁。

objective to compare the effects of hip arthroplasty and ao compressive cannular in treatment of the displaced fracture of femoral neck in elderly.methods from 1995.5 to 2004.11, 78 elderly patients of over 65 years old with displaced femoral neck fracture were operated with hip arthroplasty and ao compressive cannular.

目的 比较人工关节置换术与ao加压空心螺钉术治疗老年人有移位股骨颈骨折的疗效。方法将1995年5月～2004年11月我院收治的78例年龄在65周岁以上的有移位的新鲜股骨颈骨折患者进行回顾性研究，将病例分为a、b两组，a组为人工关节置换组，b组为ao加压空心螺钉治疗组。ao加压空心螺钉治疗组随访12～91个月，平均41.7个月，随访人工关节置换组12～96个月，平均40.3个月。

Based on situation of teaching and learning of coreless transformer and structure study of coreless transformer,the equivalent circuit of coreless transform based on CCVS is constructed.

结合空心变压器的电气分析在教学中的特点，分析了空心变压器的基本结构和基本特点，运用电流控制电压源 CCVS对之进行了等效变换，然后将空心变压器的输入电路和输出电路看成一端口，运用戴维南定理分别对其输入端口和输出端口等效成一个电压源与一个电阻的串联形式，并进行了详细的讨论

Nimbya alternantherae SF-193 is a strong phytopathogenic fungus that could cause foliar and stem necrosis of Alternanthera philoxeroides and inhibit the growth of the weed in the field.

假隔链格孢SF-193是空心莲子草的强致病菌，能引起空心莲子草快速发病，有效地抑制空心莲子草生长。

Through detailed theory analysis and formulas, the paper raveled out the limitation of big section and small section, and got conclusion that current transformer with big section and high quality PCB rogowski coils has the same measure principle as the one with ideal rogowski coils, which provides the theoretical basis for optimization design of current transformer with PCB rogowski coils and its application in the power system of mining area.

文章通过详细的理论分析和推导，解除了对截面大小的这一限制，得出大截面、高精度的PCB空心线圈电流互感器具有和理想空心线圈电流互感器相同测量原理的结论，为PCB空心线圈电流互感器的优化设计和在矿区电力系统中的应用提供了理论基础。

Combined with successful application of cast-in-place concrete GBF thin wall box structure system in residential building works of Shanxi coal central hospital,from formwork,reinforcement work,box installation and allocation,concrete work,construction supervision and other aspects study is made.

1概述GBF薄壁箱体现浇空心混凝土结构体系借鉴了预应力空心板为减轻自重，将板的腹部适当挖空的形式，不同之处在于它是全现浇的，整体性比预应力空心楼盖改善很多，且空心率大很多。与普通楼盖体系相比，该楼盖的自重明显减轻，对结构的抗震有利。

Hollow sucker rod is a kind of special product designed for production of high pour point, high condensation, high paraffin crude oil. Its connector and coupling is welded with sucker rod body in friction welding. We can get the function from the hole of hollow sucker rod. The properties of hollow sucker

空心抽油杆是用于开采&高凝、高粘、高含蜡&原油的专用产品，它是将空心杆头、接箍通过摩擦焊，焊接到无缝钢管两端形成的抽油杆，其管柱内部形成一条通道，利用这一孔道实现空心抽油杆的各种功能。

Chained small hollow concrete block masonries were tested under different vertical loads in comparison with 137 common ones . Failure mechanism was analyzed and verified and its shear strength formula obtained .

通过不同正压力下137片连锁式混凝土小型空心砌块砌体和137片普通混凝土小型空心砌块砌体的抗剪试验，分析和验证破坏机理，得出连锁式混凝土小型空心砌块砌体的抗剪承载力计算公式。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。