ISSN:0253-3839    

DOI:10.1080/02533839.1986.9676923

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

This study aims to apply modified and parallel models to the study of the engineering properties of lateritic gravels. These two models; using the reduction in the maximum grain sizes, are based on the investigation of the in situ grain size distribution of lateritic gravels. The elastic moduli are also estimated by the differential scheme of composite materials in different proportions of laterite to gravels.

ISSN:0253-3839    

DOI:10.1080/02533839.1986.9676924

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

Internal waves in open channels of various depths are studied, in this paper, and a wetted cross section with an elliptical bottom is considered. The frequencies of the first three sloshing modes of internal waves in two superposed fluids contained in an elliptical channel are calculated for various ratios of the depths of the two layers. Numerical solutions converge to analytical solutions based on the shallow water theory as the depth of the thin lower layer approaches zero. Also, solutions for the frequencies of the longitudinal modes of progressive internal waves in two superposed fluid layers contained in an elliptical channel are calculated for various ratios of the depths of the two layers and for two different wave numbersk.

ISSN:0253-3839    

DOI:10.1080/02533839.1986.9676925

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

A numerical method is used to compute the characteristics of an externally pressurized journal bearing. Results indicate that the squeeze term due to the oil pocket has very small effect on the bearing characteristics. At lower rotational speeds, double‐row hydrostatic journal bearings have higher damping coefficients than the single‐row bearings and, therefore, have a better stability. However, the stiffness coefficient and the loading capacity are lowered when using double‐row bearings.

ISSN:0253-3839    

DOI:10.1080/02533839.1986.9676926

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

PID control has been widely used in industry for a long time. Under certain circumstances, it is necessary to retune the PID controller to obtain good performance. Recently, the developments in modern control theories and computing techniques have made automatic tuning of the PID controller feasible which provides better performance. In this paper, an adaptive PID controller based on explicit criterion minimization having the same structure as conventional PID controller is proposed. This new controller's design is based on the method of Ljung and Trulsson. Various properties of the method are described. Simulation studies using the new method show that the performance is satisfactory for control of minimum phase and nonminimum phase systems.

ISSN:0253-3839    

DOI:10.1080/02533839.1986.9676927

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

The Sturm‐Liouville eigenvalue problem can be dealt with as a linear algebraic form by using expansions of orthogonal functions and particular orthogonality. Due to the available recursive relation, these linear algebraic equations can be solved as a straightforward substitution. In order to speed up the convergence, an iterative improvement is used for finding eigenvalues.

ISSN:0253-3839    

DOI:10.1080/02533839.1986.9676928

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

In dye liquor, the hydrophobic group of acid dyestuff molecules often interacts with one another to form aggregates. For the purpose of investigating the aggregative effect of acid dyestuff on the activation energy of wool dyeing, this study derives a rate equation based on the theory of Langmuir chemisorption and deals with the activation energy of wool dyeing under different dyeing temperatures and dyestuff concentrations.

ISSN:0253-3839    

DOI:10.1080/02533839.1986.9676929

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

The performance of an adaptive reservation multiaccess technique is studied in this paper. The concept of differential PCM in digital communications is applied for each user to issue request in demand. Analysis for Poisson inputs, both transient and steady‐state, have been successfully completed. The validity of analysis is also verified by computer simulations. Through examples we witness that this protocol not only shows good performance but also has good adaptability and robustness.

ISSN:0253-3839    

DOI:10.1080/02533839.1986.9676930

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

The finite element solutions of Navier‐Stokes and energy equations for steady laminar flow and heat transfer around square prisms, with attack angles of 0° and 45° have been obtained for a gas ofPr=0.7. The variations of surface shear stress, local pressure and Nusselt number are obtained over the entire prism surface including the zone beyond the point of separation. The predicted values of drag coefficients, the location of. separation, the average Nusselt number and the plots of velocity flow fields and isotherms are also presented. The trend of the present numerical results seems reasonable.

ISSN:0253-3839    

DOI:10.1080/02533839.1986.9676931

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

In this study, numerical solutions of the equations governing time‐dependent, viscous, incompressible fluid flow past a circular cylinder are presented for Reynolds numbers 100, 200, and 500. These solutions are based on the use of body‐fitted coordinate systems having a coordinate line coinciding with the body contour regardless of its shape.

ISSN:0253-3839    

DOI:10.1080/02533839.1986.9676932

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor