增强平行坐标技术可视性的研究

平行坐标是数据可视化领域中有着广泛应用的一种技术,为了增强其可视性提出了颜色比例法以区分相交折线,圆心角映射法展示信息的分布和坐标轴非等值变化显示重点区域详细信息。颜色比例法根据后一区间内直线段的颜色构成情况判断出与前一区间内直线段的对应关系;圆心角映射法展示一定条件下信息在多个维上的分布,将一个分组在相应维上占有的比例映射成对应圆心角的大小;坐标轴非等值变化通过多层焦点的交互控制实现,可以充分利用坐标轴空间,在观察重点区域详细信息的同时保持总体浏览。实验结果表明能够得到较好的可视化效果。     

论山水城市

文章回顾了作者对山水城市的认识发展过程。首次提出“奇妙的深 华文化沃土的钱学森现象”,并追溯其产生的背景渊源。剖析了该设想从酝酿到发展的过程。综合评估了该理念,并提出了发展与深化的建议,包括分成五个层次,规划设计构思的灵感线索,中西方文化的有机综合等。     

大型河流—三角洲沉积储层精细描述方法

概括地论述了大庆油田应用现代沉积和露头研究中的层次分析思想和自创的模式预侧描述法,成功地研制出依据油田密井网测井资料和大型河流—三角洲特有的沉积规律与模式,由大到小、由粗到细分层次逐级解剖砂体几何形态和内部建筑结构,精细地建立储层地质模型,系统描述储层宏观非均质体系的研究方法。该方法将整套储层划分为岩相段、单一旋回层(或单砂层)、沉积微相(或相对均质单元)、单砂体、建筑结构单元、层内非均质等6个描述层次,并对砂体井间连续性、几何形态与边界位置、厚度与渗透率的平面非均质性采用模式化预测性描述,较好地解决了储层复杂非均质体系描述和井间砂体预测的难题。     

Laterality of subcortical involvement and psychological functions.

Differences in psychological effects between lateralized cortical and subcortical brain lesions were assessed within a neuropsychological framework. The relative predominance of specific and nonspecific systems in the elaboration of incoming data at these cerebral levels and their participation in cognition and perceptual events was described. It was concluded that bilateral primacy of subcortical diffuse systems in contradistinction to unilateral primacy of cortical specific systems may account for observed differences between lateralized cortical and subcortical brain lesions. (3 p. ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Optimization of Water Supply Systems: Risk Analysis and Reliability of Supply

T he problem of determining minimum premissible storage in the optimization of water distribution networks is assessed by means of evaluating the reliability of the system operation during range crisis events. Reliability is treated in both a deterministic and probabilistic manner, and an illustration of the analysis given for a typical scenario on an existing network.     

Effects of low and high dietary levels of beta-aminopropionitrile (BAPN) on the performance of laying chickens

In two experiments, commercial laying pullets and hens were fed diets containing either low or high concentrations of beta-aminopropionitrile (BAPN), the toxin present in some legume seeds in the genus Lathyrus. BA PN was fed as mono-beta-aminopropionitrile fumarate. The main effects of feeding BAPN to laying birds appear to be on shell formation, egg weight and egg production. Heavier eggs, abnormal in shape and shell texture, were frequently obtained when BAPN was included in the diet. Effects on both egg weight and egg malformation were observed with or without a reduction in egg production. The toxic level of BA PN fumarate in the diet of laying birds appears to lie between 0.1 and 0.2 g kg^?1. Considering BAPN content in seeds of different Lathyrus species and the level of active constituent of BAPN fumarate which had adverse effects, it was found that Lathyrus seeds which contain BAPN as a toxic constituent have margins of safety and could be utilised to constitute a proportion of the layer diets without any deleterious effects.     

热激弛豫过程动力学方程的建立及计算机模拟

用热激去极化电流(TSDC)法对半绝缘GaAs(SI—GaAs)退火前后的深能级进行了测量,并推导出这一热激弛豫过程的一般动力学方程,用曲线拟合的方法对热激活能E,动力学阶数b等拟合,并用计算机模拟其理论曲线,理论与实验吻合。     

A topology for secure MVS systems

Ultimate protection of computers against programming users appears unachievable. True security seems within reach only within systems without programming users. However, programming has to be done within each computing centre. To meet these conflicting ends, this paper proposes a means of isolating any enterprise's vital data from abuse by fully mutually isolating systems at three security levels from one another.The approach proposed is already partly implemented in major computing centres, though with an effectiveness far from that required. Specifically, it is shown that shared DASD degrades the overall security level to that of the least secure system connected. A higher degree of security, as this paper suggests, is reachable in current systems by defining and implementing a three-level (minimal) topology as part of an overall security strategy.     

The Spectrum of Doubly Ionized Tungsten (W III)

The spectrum of doubly ionized tungsten (W III) was produced in a sliding-spark discharge and recorded photographically on the NIST 10.7-m normal-incidence vacuum spectrograph in the 600–2680 Å spectral region. The analysis has led to the establishment of 71 levels of the interacting 5d⁴, 5d³ 6s and 5d² 6s² even configurations and 164 levels of the interacting 5d³ 6p and 5d² 6s 6p odd ones. A total of 2636 lines have been classified as transitions between the 235 experimentally determined levels. Comparison between the observed levels and those calculated from matrix diagonalizations with least-squares fitted parameters shows an rms deviation of ±87 cm⁻¹ for the even configurations and ±450 cm⁻¹ for the odd ones.     

Tsc measurements of coupled levels in ion implanted Si

Thermally Stimulated Current (TSC) measurements have been made on deep states in ion implanted silicon. The nature of the resulting curves and the relationship of the peak to valley transition currents clearly preclude the conventional analysis based on independent emission to the valence band. The results have been analyzed with a model based on coupled levels with interlevel transitions and the fit yields reasonable energy levels and exponential pre-factors. The measurements were made by using shallow n⁺ guard ring diodes implanted with a low dose (3×10¹³ ions/cm²) of 1 MeV B⁺ ions and annealed at 350‡C for one hour. The energy was selected so that the end of the ion track would be in the depletion region of the diodes.