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Segmentation of tumor region in respiratory disease by extended algorithm

INTERNATIONAL JOURNAL OF MODERN PHYSICS C 2023年第12期34卷 2350164-2350164页

作者： Khorshidi, Abdollah Gerash Univ Med Sci Sch Paramed Gerash Iran Qaem Univ Soleimani Maktab Cent Branch Kerman Iran

Introduction: The expansion of pulmonary tumors and their alterations take place in a dynamic manner, so that vigorous segmentation of the obtained images is accurately ***: In this research, an extended algorithm in region growing was executed on CT lung tumors to investigate precise tumor region and edges. First, a new threshold via definition of greater target region around the initial tumor was implemented in MATLAB software. Second, nearby points were settled in an array and then these points were updated established upon the tumor growth to delineate the fresh tumor edges. Here, farthest distance from the center of color intensity point of the initial tumor was selected to grow the region in the algorithm. Third, fresh tumor boundary was determined via an interpolation between these fresh points by sketching lines from the tumor midpoint. Then, the edge correction was implemented and the fresh region was attached to the principal region to attain a segmented tumor ***: The proposed technique enhanced the tumor recognition by 96% and 91% maximum and minimum accuracy, respectively, in comparison with basilar method. In inclusive algorithm, the percentage of conformity had a positive effect on realization of the threshold value and renewal of the relative amount by 13% enhancement over accuracy assessment. Also when compared to basilar algorithm, it was found that at least 12% of the percentage differences in conformity segment the tumor area in lung CT images. The proposed algorithm with sufficient accuracy accelerates the segmentation process to delineate and improve the tumor edges by growing multiple selected regions. The algorithm also guarantees the independence of the results from the starting ***: According to the definition of the center of mass of the tumor color intensity, the proposed extended algorithm may be generalized to the 3D images regardless of the matrix size and the image thickness. The combination of t

关键词： Lung tumor edge area extension extended algorithm thresholding conformity accuracy CT image

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Extension of Local Association Rules Mining algorithm Based on Apriori algorithm

Extension of Local Association Rules Mining Algorithm Based ...

引用

2014 IEEE 5th International Conference on Software Engineering and Service Science

作者： Zhang Chun-sheng Li yan College of Computer Science and Technology Inner Mongolia University For Nationalities

ISBN: (纸本)9781479932795

the support is generally higher when the classical apriori algorithm is used as mining data based on association rules,if the support is small low then redundant frequent item set and redundant rules are produced large,so the local effective association rules has a larger confidence and a smaller support can not be mined out,which is the fatal defects of the classical apriori *** to the defects,the effectiveness of local rules is proved at first,meanwhile,two kinds of the correction algorithms are given: the one is apriori-con algorithm based on confidence and the other is apriori algorithm based on classification which is further divided into three kinds,aprioriclass-int algorithm based on interest classification,apriori-classpre algorithm based on forecast classification and apriori-classclr algorithm based on clustering *** correctness of the theory is proved in the article and the effective of the correction algorithms is showed by cases.

关键词： association rules Apriori algorithm defect extended algorithm

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Stability analysis of the extended ADI-FDTD technique including lumped models

引用

Science in China(Series F) 2008年第10期51卷 1607-1613页

作者： CHEN ZhiHui CHU QingXin College of Electronic and Information Engineering South China University of Technology Guangzhou 510640 China

The numerical stability of the extended alternating-direction-implicit-finite-difference-time-domain （ADI-FDTD） method including lumped models is analyzed. Three common lumped models are investigated： resistor, capacitor, and inductor, and three different formulations for each model are analyzed： the explicit, semi-implicit and implicit schemes. Analysis results show that the extended ADI-FDTD algorithm is not unconditionally stable in the explicit scheme case, and the stability criterion depends on the value of lumped models, but in the semi-implicit and implicit cases, the algorithm is stable. Finally, two simple microstrip circuits including lumped elements are simulated to demonstrate validity of the theoretical results.

关键词： ADI-FDTD extended algorithm lumped model numerical stability

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An extended algorithm of Flexibility Analysis in Chemical Engineering Processes

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Chinese Journal of Chemical Engineering 2001年第1期9卷 51-57页

作者：徐强陈丙珍何小荣 Tsing Hua Univ Dept Chem Engn Beijing 100084 Peoples R China

An extended algorithm of flexibility analysis with a local adjusting method for flexibility region of chemical processes, which is based on the active constraint strategy, is proposed, which fully exploits the flexibility region of the process system operation. The hyperrectangular flexibility region determined by the extended algorithm is larger than that calculated by the previous algorithms. The limitation of the proposed algorithm due to imperfect convexity and its corresponding verification measure are also discussed. Both numerical and actual chemical process examples are presented to demonstrate the effectiveness of the new algorithm.

关键词： flexibility analysis extended algorithm active constraint strategy

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A new two-dimensional squint mode SAR processor

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IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS 1996年第2期32卷 854-863页

作者： Franceschetti, G Lanari, R Marzouk, ES UNIV NAPLES DIPARTIMENTO INGN ELETTRI-80125 NAPLESITALY

This paper extends the processing capability of the wide angle synthetic aperture radar (WASAR) algorithm [14] to synthetic aperture radar (SAR) data acquired with the radar beam directed with an offset angle (squint angle) from the zero Doppler direction The key point of this work is the analytical evaluation of the system transfer function for the squinted geometry via the stationary phase method The range dependence of this new transfer function is compensated in two steps: a phase multiplication and a modified version of the basic fractional Fourier transform (FT). The performance of the extended algorithm is demonstrated by experiments with real and simulated data.

关键词： Doppler radar compensation digital simulation fast Fourier transforms frequency-domain analysis radar imaging radar signal processing radar theory synthetic aperture radar transfer functions WASAR analytical evaluation extended algorithm fractional Fouri Radar signal processing system transfer function Radar theory Fast Fourier transform compensated TRANSFER FUNCTIONS Digital simulation Radar beams Doppler radar Radar imaging

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