In order to guarantee the dependability of supplying power,coal mine 60 KV transformer substation 6KV incline pairs of loop electric power system,can not allow two returning circuits run side by side.

It is not easy in view of the tradition after the tube welding method welding quality to control, to achiene with difficulty the welding the interior does not allow to have welds the dregs the request, passes though many years to try to find out, the practice, my factory proposes the manual argon arc welding scrteh coat, the manual are welding screen welding method.

Because the security mechanism of Windows system does not allow Win32 program to operate the hardware directly, the WDM driver based on Win2000 is developed. The driver shields some details of operating system and hardware, realizes the independence ofsoftware library, at the same time integrates the driver with the upper software utilizing the communication method, which has met the design needs of CNC system software.

For the feasibility of integrated generator excitation and governing control, their bandwidths are analyzed in the paper, which shows that the reason of the large difference between the bandwidths of excitation and governing control system is because that the mechanical structure of governor and the requirement to safety and reliability do not allow high speed and frequent operation, however, it has little relation with control law.

Results 387 families allowed the patients the right to know and agree on the facts of hospitalization,taking up 39.2%,but 599 did not allow,taking up 60.8.249 agreed on admission into the hospital,taking up 25.3% and 737 did not,taking up 74.7%.

Nowadays, a large change take place in the big circulation of international economy and the international market, which leads to three kinds of strength not allow to be neglected occur in enterprises -- the customer, the competition and the change, which also be called 3C.

Of the masses surveyed,84.2%(mainly children and adoles- cents,83%)realized the risk of playing with dogs,and 86.5% did not allow their dogs to enter their houses.

The BO3: BO4 ratio can be determined quantitivedly from 11B MAS NMR spectra of borate crystal,but the small variation of the 11B chemical shifts does not allow a more detailed linkage of the coordination polyhedra and their environments.

Mouse is not the natural host of HBV, so it can not allow HBV's infection and replication unless the viral genome is transfected into mouse hepatocytes by different means.

However, the restrictions on g(u) do not allow the resulting restoring force function to increase faster than the linear function u-1 for u>amp;gt;1.

At the same time, the results of calculating πs values in terms of the Debye-Hückel theory without consideration for the interaction of micelles do not allow explanation of the experimental regularities.

This finding does not allow the a prioridivision of the α band into the classical α1, α2, etc.

Unfortunately, the available data on radiation effects do not allow us to reliably estimate the resistance of a particular diagnostic component to radiation damage from neutrons, γ rays, and other particles.

However, enzymatic synthesis does not allow for site-specific incorporation of modified nucleotides.

There are six bed load formulas as proposed by Meyer- Peter, Einstein, Bagnold, Engelund, Yalin and Ackers-White respectively which are currently in use throughout the world.In this paper these formulas are transformed into relationships between same dimensionless parameters such that they can be compared directly. The results indicate that at low rates of transport, in spite of the fact that certain discrepencies existed between various formulas, and yet the difference is of minor importance from the practical...

There are six bed load formulas as proposed by Meyer- Peter, Einstein, Bagnold, Engelund, Yalin and Ackers-White respectively which are currently in use throughout the world.In this paper these formulas are transformed into relationships between same dimensionless parameters such that they can be compared directly. The results indicate that at low rates of transport, in spite of the fact that certain discrepencies existed between various formulas, and yet the difference is of minor importance from the practical view point of fluvial processes. Different formulas deviate widely at high rates of transport, and the experimental data available do not allow one to draw a definite conclusion. When the flow intensity is high, the transport rate of bed load as given by Einstein formula might be too small. Although Engelund formula gives a fairly good result for all flow conditions, there is much ground for believing that the theoretical derivation of the formula fails to be consistent after (?)>0.5 . It appears at present that the approach as proposed by Bagnold opens up a new prospect to the research of bed load transport.

In the classic solution of wave equation, it is required that the initial and boundary conditions should be smooth enough and any discontinuities are not allowed in medium coefficients. But for seismic exploration, it is often needed to take different medium coeffieients in different areas and in each area, the coefficient must be a constant. There are no classic solutions in such problems. For this reason, the concept of SOLUTION should be extended somehow. Relatively to the classic solution, the extended...

In the classic solution of wave equation, it is required that the initial and boundary conditions should be smooth enough and any discontinuities are not allowed in medium coefficients. But for seismic exploration, it is often needed to take different medium coeffieients in different areas and in each area, the coefficient must be a constant. There are no classic solutions in such problems. For this reason, the concept of SOLUTION should be extended somehow. Relatively to the classic solution, the extended solution is called "The Generalized Solution of the Defining Problem".

We computed the upward propagation and evolution of different kinds of perturbations in the solar atmosphere,using HSRA as the unperturbed model.The dynamical equation used is an one dimensional compressible flow equation under gravitational acceleration at the solar surface.Polytropic gas equations of different y's are used to close this equation set.Our results show that an upward progagated small perturbation can evolve into shocks at certain heights which are nearly independent of the thermodynamic processes...

We computed the upward propagation and evolution of different kinds of perturbations in the solar atmosphere,using HSRA as the unperturbed model.The dynamical equation used is an one dimensional compressible flow equation under gravitational acceleration at the solar surface.Polytropic gas equations of different y's are used to close this equation set.Our results show that an upward progagated small perturbation can evolve into shocks at certain heights which are nearly independent of the thermodynamic processes involved,but depending strongly upon the strength of the initial perturbation.But the existence and interference of the turbalent field in the solar atmosphere will not allow these perturbations to develop into shocks.This confirms the idea that the mechanical waves generated from the convection zone are not very effective in heating the chromosphere and corona.