In this paper,the simulation models ARMA(17,16) of combustion chamber noise and dynamical pressure were given by employing the time series Autoregression Moving Average Models in using the measured noise data of the annular combustion chamber of the aero - engine and the noise data of time history were also predicted by these models.

Through the combined technologies experiment of dynamical pressure water infusion in the coal seam,tunnelling with the pneumatic pick and handpick,U-bar support and I-bar spreader bar support,we have found the ways to solve the problems such as the great pressure,being soon in bad repair,being hard to uphold,and short using cycles of the tunnels in Lugou Coal Mine.

Taking gear without tooth face invalidation such as agglutination and abrasion as a precondition,and according to the relation between maximal oil film thickness and tooth face roughness of elastic liquid dynamical pressure lubricate theory,viscosity of gear lubricities oil was educed by reliable method in this paper,and calculated formula has been elicited and applied.

By using model test of simulated materials and finite element calculation and theory deduce, the alternate exterior entry surrounding rock stability in dynamical pressure area is systemically studied.

Meanwhile, a theoritical analysis ismade of dynamical pressure and numerial calculation is worked out, whichalmost agree with the test results obtained.

Meanwhile, a theoritical analysis is made of dynamical pressure and numerial caculation is worked out, which almost agree with the test results obtained.

The mechanical effects produced by the V-shape notch, which is under both the dynamical pressure of explosive shock wave and the quasi-static pressure of explosive sas, are discussed in detail.

Wall static pressure pulsations were taken at inlet and outlet of compressor and at the outlet of single-stage rotor with high frequency and dynamical pressure transducer. Investigation was also made to the pressure pulsations of different outlet volumes by time-domain analysis and frequency-domain analysis. It gave out the time-frequency diagrams,3D power spectrums,and self-correlation and cross-correlation analysis result.

The dynamical characteristics of the gas flow in Turbo-Disk LP-MOCVD chamber is analysed. The dynamical pressure model of suppressing in desorption during InGaAlP epitaxial layer grown by LP-MOCVD at high growth temperature around 700℃ is presented. The effects of the growth parameters such as the disk speed and the reaction pressure on in composition in InGaAlP epitaxial layers are explained based on our model.

On basis of impulse-response function and through Fourier transform,solution of complementary function and Romberg integration,this method gets a formula to compute time domain of the dynamical pressure caused by the incident wave in finite water depth. Accordingly,it completes the computation and improves the precision of calculated results.

With nuclear exploding simulation set,a model experiment of steel cylindrical in dense sand was completed and the time history curve of dynamical pressure was measured.

The impulsive dynamical pressure from frequent blasting has a strong influence on designed tunnel contour,construction error and stability of surrounding rock in the course of excavating tunnel.

Based on the finite Element theory of interaction between fluid and solid, two kinds of Visual Fortran procedures are adopt in this thesis to calculate the dynamical response of Aqueduct with water: One can present the response of water body's dynamical pressure as well as all kinds of dynamical response of structure by solving Finite Element fluid-solid coupling equations when taking no account of the sloshing of water body;

They are not stripped by dynamical pressure of the intergalactic gas but stay in the galaxy until they are disrupted by formation of massive stars.

The test tube is equipped with dynamical pressure sensors which are placed directly under pressure holes inside the tube.

The performance of the network is independent of whether the raw parameters are used, or the electric field and square root of the dynamical pressure.

In disturbed conditions the magnetosphere appears to be much more sensitive to variations of the solar-wind dynamical pressure than in periods of positiveDst.

Strong hard particle precipitation occurred in the initial phase for both storms, associated with high solar wind dynamical pressure.

This paper presents an explanation of the average features of Evershed flow. Because the inertial force of Evershed flow is small compared to the gravity, Lorentz force and pressure gradient, the perturbation method could be used by adopting a small parameter which is the ratio of the typical dynamical pressure and magnetic pressure. Therefore, the dynamical processes associated with the global Evershed flow can be divided into a basic state and a perturbed state. The equations of the basic...

This paper presents an explanation of the average features of Evershed flow. Because the inertial force of Evershed flow is small compared to the gravity, Lorentz force and pressure gradient, the perturbation method could be used by adopting a small parameter which is the ratio of the typical dynamical pressure and magnetic pressure. Therefore, the dynamical processes associated with the global Evershed flow can be divided into a basic state and a perturbed state. The equations of the basic state are the same as those of mag-netostatic equilibrium between the pressure gradient, Lorentz force and gravity. The flow pattern of the theoretical results agrees well with the basic features of Evershed flow as shown by the Figures 3 and 4. The perturbed state describes the driving force for the Ever-shed flow. The Evershed flow opposes to the pressure gradient at the photosphere as the pressure in the umbra is less than that outside the sunspot. Based on the analysis of the present paper, this pressure gradient is balanced by the Lorentz force and gravity, and the driving force of the Evershed flow requires only a lower order of magnitude, and is not difficult to support from the centrifuge, perturbed Lorentz force or pressure gradient.

According to the theory of the resistivity of manganin alloy given by Yosida. K.. the resistivity is proportional to the following quantitieswhere E, is the Fermi energy of an electron, v is the volume of the conductor S is the spin of the manganese ion. D is the exchange integral function. Substituting into the formula of resistance, it is givenThen the author derives the relations of the former three terms in the right hand of this e-quation to V/V. and by means of the hydrostatic compression curve, gets the...

According to the theory of the resistivity of manganin alloy given by Yosida. K.. the resistivity is proportional to the following quantitieswhere E, is the Fermi energy of an electron, v is the volume of the conductor S is the spin of the manganese ion. D is the exchange integral function. Substituting into the formula of resistance, it is givenThen the author derives the relations of the former three terms in the right hand of this e-quation to V/V. and by means of the hydrostatic compression curve, gets the relation of R/R with respect to p as followingthe relation with the dynamical pressure is The results are compared with the experimental works both abroad and at home,they are very in accord with each other.

In this article,the test results of statical lateral pressure and dynamicallateral pressure caused by the flow of store material to the wall of silo arebriefly described. The distribution curve of dynamical lateral pressure alongthe height of the silo wall is plotted. The relevant over-pressure coefficientis obtained and the necessary experimental data are provided for "DesignStandard for Reinforced Concrete Silos". Meanwhile, a theoritical analysis ismade of dynamical pressure and numerial calculation...

In this article,the test results of statical lateral pressure and dynamicallateral pressure caused by the flow of store material to the wall of silo arebriefly described. The distribution curve of dynamical lateral pressure alongthe height of the silo wall is plotted. The relevant over-pressure coefficientis obtained and the necessary experimental data are provided for "DesignStandard for Reinforced Concrete Silos". Meanwhile, a theoritical analysis ismade of dynamical pressure and numerial calculation is worked out, whichalmost agree with the test results obtained.