Intrinsic frames of reference in spatial memory.

Three experiments investigated the frames of reference used in memory to represent the spatial structure of the environment. Participants learned the locations of objects in a room according to an intrinsic axis of the configuration; the axis was different from or the same as their viewing perspective. Judgments of relative direction using memory were most accurate for imagined headings parallel to the intrinsic axis, even when it differed from the viewing perspective, and there was no cost to learning the layout according to a nonegocentric axis. When the shape of the layout was bilaterally symmetric relative to the intrinsic axis of learning, novel headings orthogonal to that axis were retrieved more accurately than were other novel headings. These results indicate that spatial memories are defined with respect to intrinsic frames of reference, which are selected on the basis of egocentric experience and environmental cues. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

谷氨酸菌体的絮凝及分离

通过对谷氨酸菌体带电性质的测定，并采用脱乙酰甲壳素作絮凝剂对谷氨酸发酵液进行絮凝处理，研究了ｐＨ值、温度、絮凝剂的加入量及混合方式等因素对谷氨酸菌体絮凝的影响。     

数控工程质量测井仪的设计特点及应用

根据声波振动迭加原理、双发双收声幅补偿原理、等效声衰减系数概念和续至波能量积分处理方法研制出一种新的ＧＪＺ－Ａ型数控工程质量测井系统。该系统由声波、磁定位和自然伽马下井仪、深度系统、地面预处理电路、数据采集控制接口电路、４８６微机和热敏绘图仪等构成。实验测量和野外使用表明：用等效声衰减系数和续至波能量积分等参数能更精确地评价套管井一次界面和二次界面的水泥胶结质量。     

Symmetry exploitation in digital interpolators/decimators

This correspondence extends the symmetric FIR filter algorithms of the previous work of the author to the computation of interpolators and decimators. We will show that the number of arithmetic operations in digital interpolation and decimation can be significantly reduced. As a result, we introduce a new class of efficient interpolator and decimator structures     

The 1997 North American Interagency Intercomparison of Ultraviolet Spectroradiometers Including Narrowband Filter Radiometers

The fourth North American Intercomparison of Ultraviolet Monitoring Spectroradiometers was held September 15 to 25, 1997 at Table Mountain outside of Boulder, Colorado, USA. Concern over stratospheric ozone depletion has prompted several government agencies in North America to establish networks of spectroradiometers for monitoring solar ultraviolet irradiance at the surface of the Earth. The main purpose of the Intercomparison was to assess the ability of spectroradiometers to accurately measure solar ultraviolet irradiance, and to compare the results between instruments of different monitoring networks. This Intercomparison was coordinated by NIST and NOAA, and included participants from the ASRC, EPA, NIST, NSF, SERC, USDA, and YES. The UV measuring instruments included scanning spectroradiometers, spectrographs, narrow band multi-filter radiometers, and broadband radiometers. Instruments were characterized for wavelength accuracy, bandwidth, stray-light rejection, and spectral irradiance responsivity. The spectral irradiance responsivity was determined two to three times outdoors to assess temporal stability. Synchronized spectral scans of the solar irradiance were performed over several days. Using the spectral irradiance responsivities determined with the NIST traceable standard lamp, and a simple convolution technique with a Gaussian slit-scattering function to account for the different bandwidths of the instruments, the measured solar irradiance from the spectroradiometers excluding the filter radiometers at 16.5 h UTC had a relative standard deviation of ±4 % for wavelengths greater than 305 nm. The relative standard deviation for the solar irradiance at 16.5 h UTC including the filter radiometer was ±4 % for filter functions above 300 nm.     

金属及陶瓷材料冲蚀研究的进展

固体颗粒冲击材料表面造成的冲蚀磨损，受入射粒子及靶材性能等多种因素影响；本文综述了金属材料的微切削、挤压锻造、变形磨损及脱层冲蚀磨损模型和陶瓷材料的弹塑性、准静态及晶粒弹射等冲蚀模型，以及由于入射粒子碎裂引起的二次冲蚀模型，并讨论了冲蚀的影响因素。     

Study on Influence of Solute Atoms on Grain Boundary Character Distribution with Internal Friction Method

Based on the relationship between parameters of grain boundary internal friction peak(GBP)andgrain boundary character distribution(GBCD),and the internal friction results of Al-Mg,Al-Ga,Al-Cu andAl-Zn alloys,the addition of different kinds of solute atoms has different effects on GBCD.Among them,Mg atoms are able to concentrate and stabilize GBCD in AI-Mg alloys.The origin of these effects of soluteatoms on GBCD is also discussed.     

Effects of the Superlattice Structure on the Density of State of High Tc Cuprates

The effects of the superlattice structure along the c-axis on the single particle density of state (DOS) for high temperature superconductors are investigated by considering superlattice systems that consists of metals/insulators and d-wave superconductors (NS/IS superlattices). It is shown that the positions of the quasi-particle peak crucially depend on how the c-axis is modeled. Furthermore, a small current along c-axis can also change the density of state at zero energy, resulting in different behaviors for the the NS superlattice and the IS superlattice.     

经济发达地区小城镇规划中存在问题的深层思考──以长江三角洲为例

本文从小城镇研究的重要性出发，探讨了经济发达地区目前小城镇规划中存在的主要问题，对这些问题的机制进行了深入分析，并给出了小城镇发展的未来方向。     

乳状液膜用表面活性剂TH-1的合成与性能研究

本课题研究了适用于乳状液膜法的一种聚胺类高分子表面活性剂的合成及性能。采用红外吸收光谱和凝胶色谱法对高分子原材料和合成过程的中间体及表面活性剂产物进行了分析试验。实验结果表明：由它制成的乳状液稳定性好、耐酸碱、溶涨率低，是一种性能优良适合于乳状液膜用的表面活性剂。