Review of the Stanford-Binet Intelligence Scale: Fourth edition.

This article discusses the Stanford-Binet, Fourth Edition (1986). Psychologists using it for the first time may be surprised to discover that the test resembles a new test more than a revision of the old instrument. Differences between this edition and earlier versions are noted. For example, reliance on age levels is gone from the new test. Other changes in test format are discussed. Also noted are problems the test presents for the examiner. For example, instructions and scoring guidelines are sometimes inadequate. The article reviews the adequacy of the technical manual, standardization of the test, the internal consistency reliability of this Fourth Edition, and its validity. The reviewers suggest that practitioners may wish to become well-acquainted with the new Stanford-Binet so that its use might be an option for them, but they should not give the test a superior rating just because of its name. Given the hefty cost of the instrument and the time needed to master it, potential users with limited budgets and limited time may well find that their evaluation needs can be adequately filled by using another test of cognitive ability already in their possession. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Control Lyapunov functions for adaptive nonlinear stabilization

For the problem of stabilization of nonlinear systems linear in unknown constant parameters, we introduce the concept of an adaptive control Lyapunov function (aclf) and use Sontag's constructive proof of Artstein's theorem to design an adaptive controller. In this framework the problem of adaptive stabilization of a nonlinear system is reduced to the problem of nonadaptive stabilization of a modified system. To illustrate the construction of aclf's we give an adaptive backstepping lemma which recovers our earlier design.     

A theorem on neutral delay systems

It is known that the stabilization of neutral delay differential tems requires first the stabilization of the difference operator or D-operator. In case all delays in the system are commensurable, necessary and sufficient conditions for the existence of suitable derivative feedback for the stabilization of the D-operator have been known for some time [14]. In this note we derive a result in the case of noncommensurable delays analogous to the known results for the commensurable delay case.     

蜂窝式轴压构件腹板局部稳定问题研究

运用有限元分析软件ANSYS得出实腹式构件在轴心压力作用下的腹板弹性屈曲系数，验证有限元模型建立的准确性。然后运用ANSYS软件计算蜂窝式构件在轴力作用下腹板弹性屈曲系数，研究其随参数变化的趋势。     

Adaptive Stabilization for a Class of Dynamical Systems with Nonlinear Delayed State Perturbations

The time delays and uncertainties are always encountered in varies of engineering systems, and are the major sources of instability. It is important to investigate the stability and stabilization of those systems. A great deal of attention has been devoted in recent years to the stability analysis and design of controller for the linear uncertainty systems with time-delays[1-7] . For the systems with pseudolinear delay state perturbations, the effective controller also has been designed[8]. It…     

Analysis and design of a stabilized fly ash as pavement base material

The main objective of this study is to utilize a class F fly ash as base material in road pavements. Since class F fly ashes do not manifest desirable engineering properties for this purpose, it was decided to stabilize the material with cement. Fly ash may be utilized with or without aggregate as a pavement layer. It should be noted that, in this research only aggregate free stabilized mixtures (fly ash and cement only) were used since the aim was to utilize high volumes of this waste material. Cement content in the stabilized, laboratory prepared samples were between 2%, 4%, 8%, and 10% by total weight. Initially, Texas triaxial test was carried out to justify the suitability of the fly ash as pavement material. Then, mechanical tests were performed to obtain the fundamental properties of the cement stabilized material in order to analyze the pavement structure. Under repeated wheel loading, fatigue cracking is the primary mode of failure of stabilized materials in which cracks initiate due to the repeated tensile stresses. Utilizing an accelerated full scale road test data for the fatigue performance of cement stabilized fly ash and performing a mechanistic-empirical design procedure, required layer thickness for different lives were obtained for different amount of cement content.     

Use of observers for the inversion of nonlinear maps

In this paper we deal with the problem of the inversion of nonlinear maps. The first contribution of the paper is the definition, in a formal framework, of some problems related to map inversion, which are already present in the literature, for instance in the robotics area and in observer theory. The second and the main contribution consists in the solution of such problems by means of observers, for which some structures are proposed, for the state estimation of a time-varying nonlinear system associated with the given map and reference trajectory.     

Effect of stabilisation treatment of rice bran on functional properties of protein concentrates

The functional properties of differently dried protein concentrates prepared from unstabilised, acid-stabilised, heat-stabilised and parboiled rice bran were evaluated. Freeze-dried protein concentrates from all types of bran exhibited similar nitrogen solubilities. Both cabinet-and roller-dried protein concentrates had lower nitrogen solubilities than freeze-dried samples except for cabinet-dried concentrate from heat-stabilised bran. The functional properties (bulk density, water and fat absorption, emulsification and foaming capacity) of protein concentrates prepared from acid-stabilised rice bran were not significantly different from those prepared from untreated bran. Freeze-dried protein concentrates from both heat-stabilised and parboiled rice bran had low water absorption capacity and high fat absorption capacity. Cabinet-dried samples did not exhibit any foaming or emulsification capacity, thereby indicating a greater extent of denaturation. Thus, the study indicated that in addition to stabilisation treatment functionality was also influenced by the drying technique employed.     

Generation of stable limit cycles in controllable linear systems

In this paper we prove that any controllable linear systems , admits a polynomial feedback u= u(x) such that the closed-loop system admits an orbitally asymptotically stable limit cycle.Moreover, we prove that for any positive integer n, there exists an nth-order polynomial, autonomous, ordinary differential equation with a unique limit cycle.     

Definitions of terms for practical superconductors 1. Fundamental states and flux phenomena

The definitions of terms used in describing the phenomenology and measurement practices of practical superconductive materials are proposed. The definitions cover the subject categories of: 1. fundamental states and flux phenomena, 2. critical parameters, 3. fabrication, stabilization, and transient losses, and 4. Josephson phenomena. It is intended that these terms will become the basis for the development of standard measurement practices and responses are invited.