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81.
The wavelength dependence of the efficiency of an integrating sphere alters the relative spectral irradiance of the light-source system of which it is a part. Since the total radiance factor (reflected plus fluoresced energy) of a fluorescent material depends upon this irradiance, wavelength-dependent changes in the efficiency of the integrating sphere can lead to significant variations in the total radiance factor. Such variations can result from changes in the fractional area of the sample port, changes in the sphere wall coating, or the change from specular component included to excluded. Conditions minimizing the importance of these variations are described, but for the accurate colorimetry of fluorescent materials, the use of45°/0° geometry is recommended. 相似文献
82.
Bilattices and Modal Operators 总被引:1,自引:0,他引:1
83.
84.
The crystalline phases in the system (Ba, Ca) (Ti, Zr)O3 were identified and their lattice dimensions were determined from X-ray powder patterns of fired ceramic disks. Compositions near the BaTiO3 -BaZrO3 and CaTiO3 -CaZrO3 sides of the composition square gave evidence of complete solid solution, whereas all intermediate compositions contained two separate phases. Variations in the temperature of the Curie point and in aging rate were found to correlate reasonably well with variations in the character of the crystal structure. 相似文献
85.
A NUMBER OF CONCLUSIONS EMERGE FROM THE REVIEW OF RESEARCH IN THE FIELD OF INDIVIDUAL INTELLIGENCE TESTING. DEPARTURES FROM STANDARD PROCEDURES ARE MORE LIKELY TO AFFECT SPECIALIZED GROUPS THAN NORMAL GROUPS. SUSCEPTIBILITY TO SITUATIONAL VARIABLES, ESPECIALLY DISCOURAGEMENT, APPEARS MORE FREQUENTLY WITH YOUNGER THAN WITH OLDER SS. RAPPORT IS AN IMPORTANT VARIABLE IN THE E-S RELATIONSHIP. E DIFFERENCES OCCASIONALLY APPEAR, BUT REASONS FOR THE DIFFERENCES ARE NOT CLEAR. E'S EXPERIENCE IS USUALLY NOT A CRITICAL VARIABLE. WHITE ES MAY HAVE SOME SUBTLE DELETERIOUS EFFECT ON NEGRO SS' SCORES, BUT THE EVIDENCE IS NOT DEFINITIVE. INADEQUATE RESEARCH DESIGNS CHARACTERIZE MANY STUDIES ON E DIFFERENCES. A COMBINATION OF MAN AND MACHINE TEST ADMINISTRATION MAY SOLVE SOME OF THE PROBLEMS ENCOUNTERED IN INTELLIGENCE TESTING, BUT MANY QUESTIONS REMAIN UNANSWERED. (3 P. REF.) (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
86.
Lipid Oxidation in Chicken Muscles and Skin After Roasting and Refrigerated Storage of Main Broiler Parts 总被引:1,自引:0,他引:1
The muscles and attached skin of fresh chicken broiler parts, which were roasted in a convection oven and subsequently kept at 4°C for 4 days were analyzed for lipid oxidation products (LOP). Roasting and refrigerated storage significantly increased the amount of malonaldehyde which occurred faster in the skin than in the muscles. Also, after roasting, lipid oxidation fluorescence products increased in the aqueous phase and, after refrigerated storage, in the organic phase of Folch extracted muscles and skin. The lowest concentration of LOP was found in roasted, separated parts of broilers, especially in the drumsticks and wings as opposed to roasted carcass halves or quarters. The absolute amount of LOP in muscles and skin after roasting was a result of initial concentrations of LOP in raw samples and the type of roasted broiler parts. 相似文献
87.
There have been many attempts over the past few years by psychologists, philosophers, mathematicians, scientists, computer scientists, and others to contribute to the social realm by offering their expertise in solving the problems confronting society and individual man. A few years ago Fred J. Ricci wrote an article [21], in which a model of a human was attempted based on computer theory and verified with experimental findings. This paper is an extension of that work including a model on a hybrid computer that can be displayed on a modern display system (CRT). The model and research discussed in this paper is based on the principles of cybernetics and lend to conclusions which show the relationship between man's reflective and logical thought processes. Experimentation is carried out using the model developed to show the relationship of a time varying cultural environment, the input man receives from his sensors and the resultant action taken. The paper also reviews other feedback models related to behavior. 相似文献
88.
Abstract Research in distributed artificial intelligence planning has historically focused on two distinct classes of problems. One paradigm has been that of 'planning for multiple agents', which considers issues inherent in centrally directed multi-agent execution. The second paradigm has been 'distributed planning', where multiple agents more autonomously participate in coordinating and deciding upon their own actions. The work described in this paper is in the first category, planning for multiple agents. Taking the STRIPS representation of actions, and directed acrylic graphs (DAGs) as plan representations particularly well suited to parallel execution, it formally analyses the following question: how can a DAG plan be verified (i.e. how can we be sure such a plan will be correct, given our uncertainty about exactly when unconstrained parallel actions will be performed)? A method is presented for verifying the correctness of plans for multiple agents, represented as DAGs. The technique allows for the efficient analysis of a plan, despite its many potential execution histories. 相似文献
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90.