浅谈反映人体测量学来源的人体比例理论

人体测量学并不是现代社会的产物。有着很长发展历史的人体比例理论中就包含了现代人体测量学的基本内容,尽管其还不够系统完整,但至少说明了在艺术创作中诞生的人体比例理论对现代人体测量学的影响。并随着时间的推移而不断的完善发展,为现代人体测量学的系统提出奠定了坚实的基础。     

在ORACLE中通过优化软件设计来提高信息系统运行效率

在许多大型管理信息系统的中，信息量急剧增长。使用者不断提高硬件设备的性能，而系统的运行效率却没有相应提高，甚至出现下降。究其原因在规划和设计中，没有考虑运行效率，为此，结合应用软件的开发体会来阐述如何提高应用软件运行的效率。     

Optimization of the box section of the main girder of the bridge crane with the rail placed above the web plate

The paper considers the problem of optimization of the box section of the main girder of the bridge crane. Reduction of the girder mass is set as the objective function. The method of Lagrange multipliers was used as the methodology for approximate determination of optimum dependences of geometrical parameters of the box section. The criteria of permissible stresses and strains, lateral stability and dynamic stiffness were applied as the constraint functions. The obtained results of optimization of geometrical parameters were verified on numerical examples and the comparison with some solutions of cranes was made. The comparative analysis of the optimization results and the solutions was the basis for recommendations which are significant for designers during construction of cranes.     

FLASH教学中声音导入问题的浅析

目的:解决在FLASH中导入声音的问题.方法:对FLASH不支持的声音格式采取音频压缩的方法.结果:可成功将压缩后的声音文件导入到FLASH中.结论:在FLASH中使用声音可以使FLASH动画具有良好的动画效果.     

在ORACLE中通过优化软件设计来提高信息系统运行效率

在许多大型管理信息系统的中,信息量急剧增长。使用者不断提高硬件设备的性能,而系统的运行效率却没有相应提高,甚至出现下降,究其原因在规划和设计中,没有考虑运行效率,为此,结合应用软件的开发体会来阐述如何提高应用软件运行的效率。     

表征绕组特征的参数与绕组变形关系的仿真

为了提升变压器绕组变形判别精度,研究了表征绕组特征的参数与绕组变形关系的仿真方法.利用有限元方法建立表征绕组特征的参数与绕组变形关系的双绕组、同芯式变压器漏磁场模型,通过二维泊松方程混合边值的有限元解分析变压器绕组漏磁场,利用最小二乘算法基于所建立变压器漏磁场模型辨识可表征绕组特征的漏电感参数,通过所获取漏电感值与实际...     

浅议SSL-VPN系统在高校图书馆业务中的运用

VPN系统是目前较为有效、经济的一种联网方式,该文通过该系统的介绍,说明在目前高校图书馆采用VPN系统的必要性,及在图书采购中,供应商在可控情况下利用需求方提供图书馆管理系统,远程访问并进行图书编目加工.     

Training the officer of the deck

The need to train people for increasingly complex tasks given diminishing budgets makes simulation-based training attractive in both the commercial and military sectors. Training systems that use virtual environment (VE) technology are potentially both reconfigurable and portable. The same equipment could provide a wide range of simulations at or near the trainees' worksite, letting them train close to home. To explore the potential of VE technology for naval training, the US Navy is sponsoring the Virtual Environment Technology for Training (VETT) program at three Boston sites. The VETT program experiments with VE systems employing visual and audio feedback and haptic interaction (i.e. tactile and kinesthetic/force interactions). The experiments extend from basic research into human psychophysics to the development of human/machine interfaces and computational systems, and applied training. The goal of integrating basic and applied research in this way is to determine the advantages and limitations of VE technology for training. The initial project focuses on naval officers, specifically the officer of the deck on a submarine     

基于GPIB总线的温湿度综合实验系统的设计

本文探讨了GPIB测试系统的特点，阐述了温湿度综合实验系统的功能，给出了硬件设计原理和软件设计流程。     

狗股骨近侧端动脉血液供应的初步观察

应用动脉灌注法，观察股骨近侧端动脉血液供应有关的动脉血管来源，分支及走向，观察结果表明，供应股骨近侧端的血管主要有5条，股深动脉，旋股内动脉，旋股外动脉，臀前动脉和臀后动脉，在以上动脉中旋股内动脉是最主要的供血动脉，股后动脉后部发出的升支与臀后动脉，股深动脉和旋股内动脉的肌支在股后肌群中存在大量吻合支，故可认为，股后动脉也与股骨近侧端血液供应有关。     

Implementation of the velocities of the end-effector with the distributed arithmetic architecture

The fast implementation of the linear and of the angular velocities of the end-effector of robotic manipulators, using the distributed arithmetic technique is described. The linear and angular velocities of the end-effector as well as the positional and the orientational jacobian matrices is calculated by a cascade configuration of two pipelined arrays. The building blocks of the arrays are the distributed arithmetic-based circuits that implement the matrix-vector multiplications involved in the calculations. The digit-serial configuration of the proposed implementation of the linear and angular velocities of the end-effector is described, while the serial and the parallel configurations may result as special cases of the digit-serial configuration. The proposed distributed arithmetic computer architecture may be used in the real-time operation of the robot control system that requires the on-line computation of the position, of the linear and angular velocities of the end-effector and of the Jacobian matrix.     

Transformation of the analog: the case of the Saab BT 33 artilleryfire control simulator and the introduction of the digital computer ascontrol technology

This paper is about the development of modern artillery fire control simulators. The Saab BT 33 had few equals when it was operational in the early 1970s. The accounts describe the introduction of the digital computer and its victory over older control technologies during long-term social change. The case illustrates the role of engineering and craft in practice, ultimately to make the practice more controllable. The case also shows how piecemeal solutions risk becoming victims of technical innovations. The use of modern information technology for control and other purposes, only if socially accepted in its context within strong traditions, may be efficient     

Analysis of the propagation of the femtosecond laser pulse in the scattering medium

The problem of the propagation of the short light pulse in the scattering medium is considered within the radiative transfer theory. The novel approach to the accounting for the propagation path length dispersion in the small scattering angle approximation limit is proposed. The new type of the approximate solution for the medium with the high anisotropy of the scattering is formulated. The results of the numerical simulations of the proposed transient solution are presented. The application of the new solution to the polarized radiation problems is discussed.     

浅谈计算机信息技术在图书馆中的应用

在社会日益发展的今天,传统的图书馆服务模式已经无法适用新形势的发展要求,数字化、网络化等计算机信息技术的出现并应用,促使图书馆从传统功能模式向开放式、网络式的信息服务模式转变,由单一功能向多功能转变,从根本上推动了图书馆事业的发展。     

Shaping the Internet: the dynamics

Earlier, the author discussed five components of an Internet architecture (middleware; user interface; delivery system; application; and data). He completes that schema by describing the four dynamics: user processes, software development; data management; and system management. The distinction between components and dynamics can be illuminated by an analogy: if the components are features in a landscape, the dynamics are forces like wind and water currents that shape them. The components and dynamics are inseparable, and their interactions comprise the environment in which the Internet “lives”. Instead of trying to suggest the next level of detail for the four dynamics, the author gives examples of how the dynamics influence the evolution of the components and vice versa. The dynamics are susceptible to our influence (unlike the laws of gravity), so all of us have a hand in shaping the Internet by our choices as technology developers and users. The author looks at how the Internet components and dynamics affect one another     

Computer aided design education—The the more the education, the less the use

The use of computers does not at present fit comfortably into the world of the design engineer. To improve this situation, it is not the engineer but the computer that needs educating. The use of CAD requires a database combined with an engineering editor to allow evolutionary design. In the field of finite element analysis, CAD promises to save money while restoring the engineer to his proper position.     

复形法在永磁式力矩器设计中的应用

采用复形法对测量角位移及角速度用的挠性陀螺仪的永磁式力矩器进行了优化设计，有效地提高了该陀螺仪的跟踪速度。     

Implementing the directive for VDU work- the EU-state of the art

In order to improve occupational health and safety conditions in the workplace, several national directives and international standards have been defined. In 1990 the European Union (EU) defined such a directive, i.e. a minimal set of ergonomic requirements that should be met at workplaces equipped with Visual Display Units (VDUs). In order to put the directive to work, existing measurements have been reviewed to evaluate how far they support the implementation of the directive. The instrument that should be used finally for checking VDU-workplaces should not hinder the work flow and the organizational development of a company. The instrument should rather support the effective evaluation of all VDU-workplaces according to the directive. The investigations in this paper focus on the analysis of 18 techniques for measurement stemming from different disciplines. The directive addresses several different perspectives including human cognition, organization of work and technical features. However, an absence of comprehensive measurements has been identified. Most of the existing techniques for measurement focus either on users, user interfaces or on organizational issues. In order to support the development of a comprehensive instrument to check the minimal requirements of the EUdirective EU-CON, a technique for evaluation and re-design of VDU-work has been developed.     

A modification of the knapsack problem taking into account the effect of the interaction between the items

A generalization of the classical knapsack problem in which the effect of the selected items depends on the interactions between the items and may be arbitrary is considered. The mathematical model, the optimization algorithm, and the corresponding software are developed. The suggested approach is illustrated by a numerical example.     

On the Stability of the Discontinuous Particle Method for the Transfer Equation

The nonlinear transfer of mass, momentum, and energy is the main peculiarity of gas dynamics. A discontinuous particle method is proposed for its efficient numerical modeling. The method is described in detail in application to linear and nonlinear transfer processes. The necessary and sufficient monotonicity and stability condition of the discontinuous particle method for the regularized Hopf equation is obtained. On the simplest example of a discontinuous solution, the method’s advantages, which include the discontinuity widening over only one particle and the selfadaptation of the space resolution to the solution’s peculiarities, are shown.