CARS光谱测温及仪器狭缝函数对测量的影响

设计了一种利用光参量振荡器(OPO)来代替染料激光器的宽带相干反斯托克斯喇曼散射(CARS)光谱测温实验装置。为了提高CARS测量温度的精度,测量和分析了检测系统中狭缝函数对测量结果的影响,确定了狭缝函数的具体形式。将测量结果与热电偶读数比较,发现在温度范围300K～1200K内,温度测量的不确定度小于2%。     

坐标旋转法的收敛性,误差估计及扩展

本文通过推广正规序列的定义,得到一个不等式,由此证明了统一计算初等函数数值的坐标旋转法的收敛性,作了误差估计,并拓广了所计算的函数范围,成为快速计算所有初等函数的统一算法．     

An estimate of the incidence of dark cutting beef in the United Kingdom

Eight slaughterplants with throughputs ranging from 20 to 300 animals per day were examined to estimate the incidence of dark cutting beef in the United Kingdom. Four thousand, eight hundred and sixteen animals were surveyed and information concerning animal category, source, season and preslaughter handling conditions recorded. Muscle samples were removed to estimate glycogen concentration and after incubation, ultimate pH. The overall incidence of dark cutting (pHu ≥ 6·0) was 4·1%. Increased incidence was associated with short (≤ 20 miles) and long (≥ 150 miles) transport distances. Slaughter on the day of arrival rather than overnight lairage also increased the incidence. Plants were classified into small (killing ≤ 50 animals per day) or large (killing ≥ 100 per day). Eighty per cent of the animals slaughtered passed through the large plants, and a higher incidence was also associated with these plants. Bulls had the highest incidence and heifers the lowest. A seasonal effect was recorded with the highest incidence found between July and October. The results, however, indicate that factors in addition to those examined are also important.     

Lever controls on specialised farm equipment: some control/response stereotypes

Linearly arranged banks of hydraulic control levers constitute common control layouts on many specialized pieces of equipment used in agriculture, especially in California. Such controls are used to control multi-function equipment with various types of articulating mechanisms performing both linear and rotary translations in order to effect pitch, roll and yaw movements; also other movements such as clamping and encircling. Stereotypes regarding the control of the motion of a cube with six degrees of freedom by a single control lever were assessed. Results generally were consistent with previous work except for the case of the up/down motion of the cube for which a strongly anomalous phenomenon was found. Stereotypes for the assignment of cube motions to sets of multiple control levers were found to be weak or non-existent.     

李霁野外国小说译介选材与翻译策略的生态理性

中国著名的文学家、翻译家李霁野在文学创作、文学翻译方面成就斐然,但作为翻译家的李霁野却很少被研究。本研究从生 态翻译学的视角探究李霁野译介外国小说所依赖的生态翻译环境及使用的翻译策略。李霁野外国小说译介的选材主要来自前苏 联革命小说和女性主义解放小说《简·爱》等。李霁野译介外国小说的翻译策略主要有直译为主、意译为辅和欧化译。通过研究以期 对李霁野的外国小说翻译活动作出较为全面的归纳和提供新的视角。     

Three-dimensional automated nanoparticle tracking using Mie scattering in an optical microscope

The forward scattering of light in a conventional inverted optical microscope by nanoparticles ranging in diameter from 10 to 50nm has been used to automatically and quantitatively identify and track their location in three-dimensions with a temporal resolution of 200ms. The standard deviation of the location of nominally stationary 50-nm-diameter nanoparticles was found to be about 50nm along the light path and about 5nm in the plane perpendicular to the light path. The method is based on oscillating the microscope objective along the light path using a piezo actuator and acquiring images with the condenser aperture closed to a minimum to enhance the effects of diffraction. Data processing in the time and spatial domains allowed the location of particles to be obtained automatically so that the technique has potential applications both in the processing of nanoparticles and in their use in a variety of fields including nanobiotechnology, pharmaceuticals and food processing where a simple optical microscope maybe preferred for a variety of reasons.