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您的检索式：作者名="Muhammad Khizer Ali"
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| 1 | Hyperspectral anomaly detection:a performance comparison of existing techniques显示文摘Anomaly detection in Hyperspectral Imagery(HSI)has received considerable attention because of its potential application in several areas.Numerous anomaly detection algorithms for HSI have been proposed in the literature;however,due to the use of different datasets in previous studies,an extensive performance comparison of these algorithms is missing.In this paper,an overview of the current state of research in hyperspectral anomaly detection is presented by broadly dividing all the previously proposed algorithms into eight different categories.In addition,this paper presents the most comprehensive comparative analysis to-date in hyperspectral anomaly detection by evaluating 22 algorithms on 17 different publicly available datasets.Results indicate that attribute and edge-preserving filtering-based detection(AED),local summation anomaly detection based on collaborative representation and inverse distance weight(LSAD-CR-IDW)and local summation unsupervised nearest regularized subspace with an outlier removal anomaly detector(LSUNRSORAD)perform better as indicated by the mean and median values of area under the receiver operating characteristic(ROC)curves.Finally,this paper studies the effect of various dimensionality reduction techniques on anomaly detection.Results indicate that reducing the number of components to around 20 improves the performance;however,any further decrease deteriorates the performance. | Noman Raza Shah Abdur Rahman M.Maud Farrukh Aziz Bhatti Muhammad Khizer Ali Khurram Khurshid Moazam Maqsood Muhammad Amin | 2022 | International Journal of Digital Earth2022，15，1： | 0 |
| 2 | Input series out putparallel based multi-modular boost half bridge DC-DC converter with a dynamic control scheme显示文摘Multi-modular system plays an important role in power system architecture because low voltage and low power converters can be connected in any combination parallel or series at input/output side in order to obtained any given power system specifications.Multi-modular boost half bridge DC-DC converter in the configuration of input series output parallel has been investigated in this paper.The boost half bridge DC-DC converters are connected in input series output parallel configuration in order to achieve equal input voltage sharing and output current sharing between the converters.This can be achieved with the help of dynamic control scheme which consists of two loops,a voltage loop and a current loop,for each module.Dynamic behavior of multi-modular converter configuration has been observe by varying the load condition.Moreover,the results obtained through multi-modular converter describe that the system has good dynamic and steady state response.Although two converter modules are focused in this paper but it can be modified to any number of modules. | SOOMRO Amir Mahmood SYED Amjad Ali KHIZER Arbab Nighat 廖晓钟 MANZOOR Muhammad Farhan | 2014 | Journal of Beijing Institute of Technology2014，23，4： | 0 |
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