高分辨率模式下页切换技术及其在动态画面编程中的应用

随着计算机软件技术及其应用水平的不断提高，人机界面越来越受到软件设计和编制人员的关注，动态画面的显示是其中的主要方面。虽然现在WINDOWS系统及应用软件正在积极地开发和推广之中，但DOS环境下的人机界面以其界面灵活、操作简单仍得到许多过程控制软件开发者的使用。因此，我们认为，研究和开发DOS环境下的高质量的动态画面仍有其必要性。目前，计算机动画显示常用方法主要有三种：一是putimage方法即图形块移动法，它主要用于简单的动态画面显示；二是采用调色盘重置技术；三是采用显示页切换技术。其中，第3种方法操作简单、…     

机械振动对热作模具钢显微组织和热疲劳性能的影响

振动能量已被用于冶金和工程领域的许多方面。凝固过程中可用不同的方法提供振动，资料介绍了机械式、电磁式、声波式及超声波式振动对细化晶粒，增加密度，脱气，补缩，第二相形态、尺寸、分布都具有显著影响。然而，也有报导电磁和超声波振动成本高，必须有巨大的能量才有效，相对的机械振动（MV）由于其简单及成本低而应用较普遍。     

涟钢薄板坯连铸连轧控制系统中InTouch的应用

1 前言 InTouch是由美国Wonderware公司开发的组态软件，是FactorySuite2000中的一个核心组件。它具有可视化编程、使用简单、组态灵活、组网方便、与流行的数据库有良好的接口、可以和许多应用程序很好的协同工作等优点，有非常强大的监控功能。InTouch包括应用程序管理器、WindowMaker和WindowViewer三个主要程序以及诊断程序Wonderware Logger 。     

软管泵及其性能

软管泵比传统的许多液压泵结构简单、工艺先进，适用于多种混合流体。本文介绍了软管泵的工作原理、结构特点、性能参数。     

侧顶复吹AOD炉精炼不锈钢过程中钢水混合特性的初步研究

与其他的不锈钢精炼工艺相比，氩氧脱碳（AOD）工艺有许多明显的优点，在全世界得到了广泛的应用和推广。近年来，AOD炉精炼不锈钢的发展趋势是使用高铬高碳铁水作为主要原料，丁艺方式也从简单的侧吹发展为侧顶复吹（包括顶底复吹）以降低生产成本和能源消耗，减少废钢的消耗量。日前中国已采用了大型侧顶复吹AOD炉。     

群体智能

群体智能指许多简单个体通过相互合作产生复杂智能行为的特性。目前对群体智能的研究仍处于初级阶段，但是由于它在许多领域中都表现出令人满意的寻优性能，所以越来越受到相关领域学者的关注。本文对群体智能的概念、特点和主要模式进行了综述，并从人工智能和复杂性科学的角度对其作了进一步阐述。     

热电厂主控系统弱电选线改造

本钢新建热电厂主控系统二次回路采４８Ｖ弱电选线中间环节，但存在着许多问题，严重影响了正常的生产运行，在经过考察的基础上，自已动手将复杂的弱电控制系统改为回路简单清晰明了一对一控制，并完成了安全过渡工作。     

JW—3型介质雾化燃烧器的研制及应用

针对国内许多工业窑炉燃烧器烧重油或渣油时燃烧困难，特别是冷炉点火冒黑烟的问题，研制出JW－3型介质雾化燃烧器。它具有雾化好，燃烧完全，火焰温度高，结构简单、新颖，调节范围大，对窑炉的适应性好等优点。     

热电厂主控室系统弱电选线改造

本钢新建热电厂主控系统二次回路采用４８V弱电选线中间环节，但存在着许多问题．严重影响了正常的生产运行．在经过考察的基础上，自己动手将复杂的弱电控制系统改为回路简单、清晰明了的一对一控制，并完成了安全过渡工作．     

电流电压速断特性的新判据和相互配合

由电流，电压两种元件共同构成的电流，电压速断的可靠性和灵敏性必须用相同的标准来评价，而现用判据可靠系数和灵敏系数由于基于不同标准而引出许多问题，因此提出了新的判据，可靠度Ｃｋ和灵敏度ＣＬ，应用后效果很好，相互配合使用简单，准确。     

Judgments about forces in described interactions between objects.

In 4 experiments, participants made judgments about forces exerted and resistances put up by objects involved in described interactions. Two competing hypotheses were tested: (1) that judgments are derived from the same knowledge base that is thought to be the source of perceptual impressions of forces that occur with visual stimuli, and (2) that judgments are generated using simple models or heuristics for deriving force judgments from kinematic information. The results show some similarities with perceptual impression research, particularly that an active object is judged to exert more force on an inactive object than the latter exerts on the former. However, most of the available kinematic information had little or no effect on judgment, supporting the hypothesis that force judgments are generated according to simple rules. Presentation of information about damage to the objects resulted in use of all available kinds of information; this could reflect greater imageability of damage information than kinematic information. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Gas-chromatographic determination of dyphylline in serum and saliva

We describe a simple determination of dyphylline in serum and saliva by gas chromatography after solvent extraction. Dyphylline concentrations were found to be about 36% higher in saliva than in the corresponding serum.     

High power lens with a measurement water cell

A simple water cell can be used to increase the range of an ordinary lensometer by about three times by using an application of Snell's law. This technique can be very useful in low vision applications where other methods of measuring high plus ophthalmic lenses are always cumbersome and time consuming and sometimes inaccurate or inconclusive.     

Pitfalls in the determination of intraocular lens power without ultrasound

The rule is simple: An 18 diopter intraocular lens tends to restore the basic refraction. For each diopter of basic refraction to be corrected add or subtract 1.25 diopters. To determine the basic refraction a careful history and an examination of old glasses and past refraction records is necessary. When the basic refraction cannot be ascertained, capital errors may occur. Given the basic refraction, errors or several diopters are still apt to occur. Calculation of intraocular lens power based on K-readings and ultrasonic measurements is therefore always advisable and a must when there is doubt about the basic refraction.     

Predicting the efficiency of chemical processes in the treatment of ores and low-grade concentrates

The large body of knowledge about the relation between chemical process efficiency and mineralogical features is of only limited use. The profession ought to try to improve the methods of using information as well as adding to the knowledge. One attempt is described.Correlations between process efficiency factors and the mineralogical features of low-grade concentrates have been developed from both a theoretical analysis and experimental measurements. The ultimate recovery of a reactive phase in an inert matrix can be calculated from simple measurements of the particle size, porosity and pore size of the concentrate, and the grain size of the reactive mineral. The rate of recovery, up to 98% recovery, can be calculated from simple measurements of particle size, porosity, proportion of reactive mineral and tortuosity. Some details are given.The correlations are of potential use in process selection and preliminary design. Satisfactory predictions have been made for near-ideal systems. Improvements in the measurement of pore size and tests on more realistic materials are required. The ultimate benefit of the correlations will be determined by the magnitude and frequency of the effects of mineralogical features other than those specified above.     

Plasma levels of pregnancy-specific beta1-glycoprotein in normal pregnancy

Pregnancy-specific beta-glycoprotein (PSbetaG) is a major product of the trophoblast which has only recently been identified. Like human placental lactogen, the concentration of PSbetaG in maternal blood rises throughout pregnancy until about 34 weeks, thereafter tending to remain constant until term, with only a small day-to-day variation in individuals. The circulating maternal levels of PSbetaG between 34 weeks and term are about 200 mug/ml, 20 to 30 times greater than the levels of placental lactogen, thus allowing detection and measurement of PSbetaG by relatively simple techniques. The levels of PSbetaG are above the normal range in the majority of twin pregnancies. It is suggested that PSbetaG measurements may be useful in assessing placental function and may help in the detection of multiple pregnancies at an early stage of gestation.     

Determination of the renal clearance in combination with isotope nephrography

The possibilities of a determination of the renal clearance including the separation of sides with the help of simple nuclear-medical examination and measuring techniques are described. In 50 patients the determination of the effective flow of renal plasma was carried out with 131J-labelled iodohippuric acid. Methodic variants were compared. The examinations of the patient last one hour. They can be carried out in the outpatient department within the isotopic nephrography. In addition to this only several takings of blood samples are necessary. A catheterization of the urinary bladder as it is necessary for the classical determinations of the clearance is no more to be done. The results show that with the help of the methods described valuable quantitative informations about the function of the kidneys are to be got.     

Esthetic restorations for posterior teeth: practical and clinical considerations

The current abundance of posterior esthetic restorative materials and techniques may be confusing. This paper describes a simple and logical global concept that assists clinicians in choosing the appropriate therapeutic modality according to well-defined clinical criteria. Practical considerations about cavity preparation, base-lining, filling, luting, and finishing procedures are reviewed.     

Correlation of microstructure and fracture toughness in two 4340 steels

A correlation is made of plane strain fracture toughness and microstructure in two steels corresponding to AISI 4340 composition. The steels were deoxidized with aluminum and titanium-aluminum additions, respectively. In the case of the aluminum killed steel, austenitizing at temperatures above 950 °C led to large austenite grain sizes, whereas in the titanium steel grain sizes were maintained below about 70 μm even after austenitizing at temperatures approaching 1200 °C. This allowed a comparison of variations in plane strain fracture toughness with austenitizing temperature between microstructures that underwent large increases in grain size and those that did not. The results are interpreted using a simple fracture model which indicated that particle spacing is of primary importance in controlling toughness. The overall observed phenomenology, however, is not explainable using simple models that essentially require that either critical stresses or critical strains be achieved over distances scaling with microstructure. This finding suggests that more detailed crack tip models than presently exist are required if the full effects of heat treatment are to be understood and explained. Formerly Graduate Student at Brown University     

The generalized cone in human spatial organization

The generalized cone is one of the newer concepts useful for describing spatial structures, and it has become popular as a volumetric primitive in models of object recognition. Apart from this use of the concept (or perhaps underlying it), the generalized cone can be considered a species of spatial regularity. In the general definition of symmetry as invariance across transformation, the generalized cone is a combination of translation and dilation symmetry. In such symmetry, there is homogeneity both of the slants of edges and surfaces of an object about an axis and the radial positions of these features about the axis. The results of two research projects are reviewed suggesting that the generalized cone is useful in human spatial organization. In the first instance, each of the three simpler regular polyhedra, the Platonic Solids, are easiest to perceive and imaging when they are organized as generalized cones. In the second instance, people imagine simple rotations best when the symmetric space that would be traced by the motion is aligned with salient spatial reference systems.