According to the structural properties and the vibration displacement of the box girder bridge, the element space damping matrix of the box girder bridge is derived on the principle of energy. The expression for this damping matrix is presented in this paper,which can be used for engineering.

The static stability factor of double-leg thin-wall high piers under the action of construction loads is deduced and presented by a simple algebraic expression by making use of the Principle of Energy.

Based on the feature of density flow movement and varying mechanism of water body weight ratio along the channel, a formula for sedimentation caused by density flow was deduced by the principle of energy, which was used for calculating sedimentation of the approaching channel of Dayuandu Lock.

For analysing of the way of practical application of ATT7022B in ARM in detail,the identity and principle of energy chip ATT7022B are introduced,and combining with the applications of protection devices in the mine for the parameters collection,the design of LPC2292 and ATT7022B hardware interface and software programming are given.

A new method for calculating wellbore pressure of pumping wells is obtained based on conservation principle of energy and multi - phase flow regularity, combining with production characters of pumping wells, the outflow curve of pumping wells is calculated.

According to the principle of Energy Bandgap Thoery and Optical Absorption Principle of semiconductor materials, four different structures have been designed as (a)Quartz/Ge/Si;

A geometrically attractive and covariant derivation of the balance laws from the principle of energy balance in terms of this stress is presented.

From the results of tensile, compression, and three-point bend testing of specimens, the parameters of elasticity and strength for an "equivalent" orthotropic body have been determined on the basis of Bolotin's principle of energy smoothing.

Then based on principle of energy equilibrium we propose a global infrared image synthesis model for urban scene, discuss the specific forms for various parts of the scene and compute their surface temperature.

We propose to reconcile these apparently contradictory results by combining the virial theorem and a principle of energy partitioning between energy storage elements in a system with dissipation.

During this period, Helmoltz (über die Erhaltung der Kraft, 1847) showed that the principle of energy conservation may be applied to living systems.

In some quantum mechanical problems involving singular states usually exists phase angle uncertainty. Recently in the investigation of the scattering of a Dirac particle with the charge Ze and a fixed magnetic monopole, Kazama, Yang and Goldharber [2] introduced some extra magnetic moments in order to eliminate the phase angle uncertainty. In this paper, instead of introducing any extra magnetic moment we use the adjusted framework of quantum mechanics suggested in [3], the criterion of orthogonality and the...

In some quantum mechanical problems involving singular states usually exists phase angle uncertainty. Recently in the investigation of the scattering of a Dirac particle with the charge Ze and a fixed magnetic monopole, Kazama, Yang and Goldharber [2] introduced some extra magnetic moments in order to eliminate the phase angle uncertainty. In this paper, instead of introducing any extra magnetic moment we use the adjusted framework of quantum mechanics suggested in [3], the criterion of orthogonality and the variation principle of energy (indefinite phase as a variation parameter) to determine the phase angle, the scattering cross section and the bound states uniquely. These principles for the determination of the solution have been tested for its correctness, because the result is consistent with the solution of reference [2]. By using these principles the problems of scattering and bound states of systems consisting of a charged magnetic monopole and a charged Dirac particle, as well as the monopole pair are exactly solved.

The behaviour of rigid-plastic cylindrical shell under explosive loads has been studied and the number solution of shell motion and stress field given in references[1]、[2]. On this basis, this paper makes a further investigation and achieves an analytical solution according to the principle of energy distribution. Therefore, it is simple in calculation, compatible with real conditions and valuable to engineering application.

The dynamic properties of the unstable (fast) propagation of cracks, especially the rule of the variation of propagating velocity, are discussed. The case to be considered is that the extension of cracks is not very long (as the cases of rapid crack propagation under impulsive load) , the main idea of this paper is that the rapid propagation of cracks may be treated as a vibration problem and is connected to the basic conceptions of fracture mechanics (such as criterior of fracture, etc.) by the principle...

The dynamic properties of the unstable (fast) propagation of cracks, especially the rule of the variation of propagating velocity, are discussed. The case to be considered is that the extension of cracks is not very long (as the cases of rapid crack propagation under impulsive load) , the main idea of this paper is that the rapid propagation of cracks may be treated as a vibration problem and is connected to the basic conceptions of fracture mechanics (such as criterior of fracture, etc.) by the principle of energy equivalence. The rapid propagation of cracks is essentially a specific type of the transient vibration of elastic bodies, with the boundary conditions varying with the time. Under the assumption of equivalence, the above problem may be treated as the initial-value problem of a damped system with multiple degrees of freedom, considering the nonlinear effect of stiffness due to the extension of crack. After further simplification, it is deduced to a transient response problem of a damped nonlinear system of single degree of freedom under the initial condition of displacement, so that the solution can be obtained numerically. The fundamental conceptions for which the model is constituted, is the principle of the whole amount of energies being equivalent between the model and practical element, and the primary (main) hypothesis is that the fracture energy dissipated during the propagation oi crack is equivalent to the damping energy of the model system. The DCB specimens are taken as an example for explaining the theory and computing procedure. Numerical examples are calculated and compared with experimental results.In order to record the complete procedure of the rapid propagation and arrest of the crack by experiments, a new method of eddy-current type is developed.Computational results of several specimens of different materials are all coincided well with the experiments. So it can be concluded that the computational model can be used at least for such cases. Further research would be studied for more compli cate cases.