共查询到6条相似文献,搜索用时 0 毫秒
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分形维数计算具有计算复杂度高、计算时间长等特点,严重影响计算的实时性。针对此问题,在充分分析分形维数计算内在特性的基础上,利用分形维数具有流水线计算的特点,提出了一种计算分形维数的流水线体系结构,可有效提高分形维数计算的实时性。由于嵌入式并行处理硬件平台资源有限,对分形维数计算实时性进行优化的同时还需要考虑资源消耗的优化。通过对不同级数流水线运行时间和资源消耗的分析,建立基于运行时间与资源消耗的优化目标函数,从而得到运行时间与资源消耗最优的流水线结构。并与已有的计算分形维数的并行算法进行对比分析,实验结果表明,本文提出的优化方法在提高计算实时性的同时有效降低了资源消耗,实现了运行时间与资源消耗的优化。 相似文献
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Quantification of structural changes in acute inflammation by fractal dimension,angular second moment and correlation 下载免费PDF全文
MARIJA STANKOVIC IGOR PANTIC SILVIO R. DE LUKA NELA PUSKAS IVAN ZALETEL SANJA MILUTINOVIC‐SMILJANIC SENKA PANTIC ALEXANDER M. TRBOVICH 《Journal of microscopy》2016,261(3):277-284
The aim of the study was to examine alteration and possible application of fractal dimension, angular second moment, and correlation for quantification of structural changes in acutely inflamed tissue. Acute inflammation was induced by injection of turpentine oil into the right and left hind limb muscles of mice, whereas control animals received intramuscular saline injection. After 12 h, animals were anesthetised and treated muscles collected. The tissue was stained by hematoxylin and eosin, digital micrographs produced, enabling determination of fractal dimension of the cells, angular second moment and correlation of studied tissue. Histopathological analysis showed presence of inflammatory infiltrate and tissue damage in inflammatory group, whereas tissue structure in control group was preserved, devoid of inflammatory infiltrate. Fractal dimension of the cells, angular second moment and correlation of treated tissue in inflammatory group decreased in comparison to the control group. In this study, we were first to observe and report that fractal dimension of the cells, angular second moment, and correlation were reduced in acutely inflamed tissue, indicating loss of overall complexity of the cells in the tissue, the tissue uniformity and structure regularity. Fractal dimension, angular second moment and correlation could be useful methods for quantification of structural changes in acute inflammation. 相似文献
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Roger G. Ulrich 《Microscopy research and technique》1988,10(1):53-65
Conventionally, all specimen vial and block labels are handwritten or typed, a labor-intensive process open to human error, particularly in a lab that processes large numbers of samples. The computer program described in this report was developed to reduce or elimiate this problem. The program is menu-driven, asking specific information from the user, and runs on an IBM PC (or compatible). It is designed to accurately produce specimen collection vial labels, resin block labels, and data sheets for inclusion in a research notebook. A task that in the past may have required much time at the typewriter can now be accomplished without error in a few minutes. Although designed to fit the needs of a pathology laboratory, the program (written in BASIC) can be easily modified to fit other applications. 相似文献
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Micrometer-scale three-dimensional data from fluorescence microscopes offer unique insight into cellular morphology and function by resolving subcellular locations of fluorescent dyes and proteins. To increase field-of-view size while using a high-resolution multiphoton microscope, we have created an automated system of rapidly acquiring overlapping image stacks from multiple fields-of-view along a nonplanar tissue surface. Each image stack is acquired only between the surface and the maximal penetrating depth, as determined by the image signal-to-background ratio. This results in the acquisition of the volume containing visible tissue along the tissue surface, excluding the empty volume above the tissue and the volume beyond the maximum imaging depth within the tissue. The automated collection of overlapping volumes is followed by reconstruction that can efficiently generate a single three-dimensional volume of the tissue surface. This approach yields data spanning multiple millimetres at micrometre resolution that is faster while requiring less work from the microscope operator. The advantages of the system are demonstrated by acquisition of data from intact, unfixed organs without a coverglass both in vivo and in situ. 相似文献
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Dominic S. Guevarra Akira Kyusojin Hiromi Isobe Yoshiaki Kaneko 《Precision Engineering》2002,26(4):389-395
This paper presents a new approach in lapping process in making appropriate condition to improve the manufacturing operations for ball screw. After grinding, high precision ball screw is lapped by highly skilled operators. These operators have the ability to control and maintain the lapping conditions by sensing the lapping torque manually. Prior to lapping process, the effective diameter must be measured to find out the effective threaded profile along the screw shaft. The section which has a large effective diameter will be primarily lapped wherein the lapping torque is high. The aim of this study is to establish a control scheme on the automatic lapping machine for high precision ball screw in both measuring and finishing process. A prototyped horizontal lapping machine with in-process torque monitoring system has been designed, built, and tested. This is to determine the relationship among lapping torque, effective diameter, and error on travel to establish the measurement system to control the finishing operations efficiently and eventually improve and eliminate the various sorts of error components in a ball screw. The experimental results showed that the new lapping method could adequately predict the effective diameter and error on travel by observing the lapping torque. 相似文献