碾压混凝土坝施工机械配套方案的模糊优选

本文针对碾压混凝土坝施工机械配套方案的多样性，复杂性和选择方案时证券条件的模糊性提出采用模糊优选方法和层次分析法相结合，对多个待选方案进行综合评价和优选。论述了评价系统的建立，评价指标隶属度的确定，以及用层次分析法确定各评价指标间的相对权重。并介绍了模糊优选程序及一个应用实例。     

Behavioral measurements on animals participating in space flight.

A twofold mission was established for a branch of the Aeromedical Field Laboratory: "(a) to measure animal behavior as affected by accleration, noise, vibration, weightlessness, ionizating radiation, temperature extremes, and other environments peculiar to space flight; (b) to adapt standard laboratory apparatus for use in these environments… . In adapting laboratory equipment for use in a space vehicle special consideration has to be given to volume, weight, and reduced electrical power." A miniaturized operant chamber for a mouse was developed and is shown in a figure. Special problems of engineering psychology applied to outer space flight are indicated. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The thermal control system

This paper presents the design, analysis and performance of the thermal control system ofAryabhata. A passive thermal control system, using flat absorber-AK-512 black paint for the outer surface of the satellite and a combination of solar reflector-AK-512 white paint and mechanical polishing for the inner surfaces, was employed to maintain the temperature of all the electronics subsystems onboard the satellite within the specified limits of 0°C and 40°C during the operational life of the satellite. The in-flight temperature data obtained from sixteen temperature sensors onboard the satellite was compared with the theoretically predicted temperature values and the agreement was good for all electronic subsystems housed within the framework of the satellite. The observed deviations in temperature for the tape recorder, proportional counter package and gas bottles of the spin-up system are attributed to the assumptions made for the mathematical model. It has been found that by improving these approximations, the deviations could be reduced to negligible values.     

Mate-seeking behavior and reduced mating byEphestia cautella (Walker) in a sex pheromone-permeated atmosphere

The mating rate ofEphestia cautella (Walker) was inversely related to the level of pheromone permeating the air. However, permeation did not prevent mating by altering the number of females calling or the frequency, duration, or pattern of male flight. Instead, permeation probably prevented mating by reducing the distance from which a male can respond to a female. The pheromone level necessary to achieve a particular reduction in mating increases with moth density.Mention of a commercial or proprietary product in this paper does not constitute an endorsement of that product by the USDA.Department of Entomology and Nematology, University of Florida, employed through a cooperative agreement with the Insect Attractants, Behavior, and Basic Biology Research Laboratory, Gainesville, Florida, 32604.     

Radar target detection as a function of search area and viewing distance.

The detection task employed a 9?-in. plan position indicator (PPI) and simulated targets. 30 Army trainees served as Ss. Each S performed the 9 combinations of viewing distance, (a) 6 ins., (b) 12 ins., (c) 18 ins., and, search area, (a) whole scope, (b) ? scope, and (c) –1–1??-diameter circle within the whole scope. A Treatments X Treatments X Subjects analysis of variance indicated significant main and interaction effects: as viewing distance increases, detection performance is degraded; as search area increases, detection performance is degraded; optimum viewing distance when searching the whole scope is approximately 12 ins., while optimum viewing distance for a small area (–1–1??-in. diameter) within a larger area is 6 ins. or less. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

垂直耦合式飞行时间计数器

本文介绍一种光导与闪烁体垂直耦合式的端盖飞行时间计数器,它既有较满意的物理特性,又满足了机械尺寸的要求,光导占用较小空间。时间分辨率(标准偏差)为150—217ps。     

多Agent环境下规划的验证方法

如何验证多ａｇｅｎｔ规划是一个非常重要的研究课题，因为该研究关系到规划的求解能否在分布式环境下有效地进行。在本文中，我们讨论了规划的验证方法，给出了压缩集合的生成算法，并给出了该算法的正确性证明，与Ｋａｔｚ等人所提出的算法不同，我们用正向邻接表和逆向邻接表来表示规划链关系Ｄ，用辅助数组来控制所用到的子图（即不是真正的生成子图，但由辅助数组即能看出当前所要处理的子图），提出了避免无用子图产生的方法。     

无人驾驶飞机机载传感器数字化研究与应用

综述了几种不同型号的无人驾驶飞机机动数字式大气数据传感器测量系统的应用研究，着重介绍了一种小型数字式高度－空速测量系统的实现方法．该系统由小型硅压用传感器和微处理器组成，可以满足研制中的小型无人机机载数字式自动驾驶仪的要求．这种测量系统体积小、重量轻、性能价格比高，可望在其它低成本无人驾驶飞行器上得到广泛应用．     

飞行器三维动画仿真

本文介绍了基于微机和图形加速卡的飞行器三维动画仿真，讨论了真实感三维实体动画的实现方法。利用飞行器三维动画仿真系统可方便建立飞行器实体模型，选择飞行器实体及运动数据，交互地观察飞行器运动画。     

致病菌快速检测管联合基质辅助激光解吸电离飞行时间质谱法鉴定即食食品中的大肠埃希氏菌O157:H7

目的 建立基于致病菌快速检测管技术联合基质辅助激光解吸电离飞行时间质谱法(matrix-assisted laser desorption ionization-time of flight mass spectrometry, MALDI-TOF MS)快速、高效、准确鉴定即时食品中大肠埃希氏菌(Escherichia coli, E. coli) O157:H7的方法。方法 选取改良胰蛋白胨大豆肉汤(modified tryptone soya broth, mTSB)为初筛培养基, 制作出针对即时食品中E. coli O157:H7的致病菌快速检测管, 初筛阳性结果采用MALDI-TOF MS技术鉴定。结果 5株常见E. coli O157:H7菌株均能特异检出, 而其他非E. coli O157:H7均未检出, 灵敏度可达51 CFU/mL; 通过对人工污染样品和自然样品检测, 鉴定结果和GB 4789.36—2016《食品安全国家标准 食品微生物学检验 大肠埃希氏菌O157:H7/NM检验》方法完全一致, 且检测效率提高了30%。结论 两种技术联合应用建立的鉴定即时食品中E. coli O157:H7的新方法, 操作简便、成本低廉, 适合推广, 为快速、准确鉴定即时食品中E. coli O157:H7打开了新思路。