FoxBASE与高级语言接口程序的设计

在计算机的应用编程中，经常会遇到在ＦｏｘＢＡＳＥ环境下使用高级语言的问题。本文通过实例及对数据库结构的分析，介绍了ＦｏｘＢＡＳＥ与高级语言接口程序的功能、原理及简单的设计方法。     

Computer software as text

Participatory design strategies have placed the user at the center of the design process, leaving computer software designers without guidelines for how to design and implement the software system. This paper aims to bring the designer back to the center of the design process. and the way of doing it is to consider computer software as text. Three different text theories are presented in order to explain what is meant by text, namely pragmatics, structuralism and deconstructivism. Finally it is discussed how the design processes should be understood, and how they should be organized when taking the text point of view of computer software.     

厅堂音质的听觉化模拟技术

厅堂音质的听觉化模拟技术是计算机技术、室内声学、电声技术相结合的双耳听觉化模拟技术，是新一代的厅堂音质ＣＡＤ技术的关键。同时听觉化模拟技术也为未来新的立体声制式的出现提供了可能性，这对未来的数字立体声广播、多媒体广播都可能产生巨大的潜在影响。本文对此项技术的原理、声场模拟、听演化实现过程、软件研究及应用前景等作了简要的介绍。     

计算机轧辊管理软件

使用计算机管理轧辊可以非常方便地查询每一条轧辊的材质、产地、车削情况使用情况及该辊的轧制产量等数据，并可根据要求打印表格或轧辊消耗报表。     

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由于天然气输气管线埋在地下，在通球清管过程中，球的运行情况不能直接观察，管线入口和出口压力在球运行过程中的变化也不能提前预测，也难准确控制进气量，使球能以１ｍ／ｓ的速度到达出口，为此进行了天然气输气管线清管通球计算机仿真系统的设计与实现的研制。该仿真系统是在深入分析和研究天然气输气管线清管通球运行规律的影响因素的基础上，以数据库管理、计算机仿真技术和人工智能等新技术为主要工具来开发的。着重介绍了该仿真系统的总体结构与功能设计，软件编程与调试。该仿真系统能真实仿真清管球在管线内运行，通过对靖边—榆林输气管线多次清管通球的运行过程实际模拟，其符合率在９３％以上。     

煤矿微机安全生产监测监控系统

本文介绍了分站式系统、无分站式系统以及复全式系统的特点，主要论述了复合式微机安全生产监测监控的结构、性能和应用。     

Efficient Reflectance and Visibility Approximations for Environment Map Rendering

We present a technique for approximating isotropic BRDFs and precomputed self-occlusion that enables accurate and efficient prefiltered environment map rendering. Our approach uses a nonlinear approximation of the BRDF as a weighted sum of isotropic Gaussian functions. Our representation requires a minimal amount of storage, can accurately represent BRDFs of arbitrary sharpness, and is above all, efficient to render. We precompute visibility due to self-occlusion and store a low-frequency approximation suitable for glossy reflections. We demonstrate our method by fitting our representation to measured BRDF data, yielding high visual quality at real-time frame rates.     

Boundary Constrained Swept Surfaces for Modelling and Animation

Due to their simplicity and intuitiveness, swept surfaces are widely used in many surface modelling applications. In this paper, we present a versatile swept surface technique called the boundary constrained swept surfaces. The most distinct feature is its ability to satisfy boundary constraints, including the shape and tangent conditions at the boundaries of a swept surface. This permits significantly varying surfaces to be both modelled and smoothly assembled, leading to the construction of complex objects. The representation, similar to an ordinary swept surface, is analytical in nature and thus it is light in storage cost and numerically very stable to compute. We also introduce a number of useful shape manipulation tools, such as sculpting forces, to deform a surface both locally and globally. In addition to being a complementary method to the mainstream surface modelling and deformation techniques, we have found it very effective in automatically rebuilding existing complex models. Model reconstruction is arguably one of the most laborious and expensive tasks in modelling complex animated characters. We demonstrate how our technique can be used to automate this process.     

YKGX—1油库微机控制管理系统

本文介绍了一种分布式油库自动化控制,管理微机系统YKGX-1。重点介绍了其功能、组成、原理及特点。经实际运行证明,YKGX-1系统实现了油库收、发、存、管理一体化,系统自动化程度高,发油精度优于3‰。     

适用于实时协同编著系统的并发控制研究

实时协同编著系统是最受欢迎的实时ＣＳＣＷ应用系统之一，适用于实时协同编著系统的并发控制用于解决参与协同工作用户对共享对象操作时存在的冲突问题。本文对这种新的并发控制与适用于分布式数据库系统等的传统并发控制进行了比较，讨论了一些适用于实时协同编著系统并发控制方法的新评价参数，分析了传统并发控制方法应用到实时协同编著系统时所遇到的问题。最后，我们介绍了一些文献中已有原型系统所使用的并发控制方法。