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Rehan, Muhammad,Mobeen, Muhammad Bilal,Tufail, Muhammad,Ahn, Choon Ki IEEE 2018 IEEE transactions on circuits and systems. a publi Vol.65 No.9
<P>This brief provides a novel criterion for the analysis of convergence of states of an infinite impulse response (IIR) digital filter to a bounded region under the influence of composite effects of quantization and overflow nonlinearities. The developed criterion is less conservative in its approach in terms of analyzing stability than conventional methods and can be employed for implementation of an IIR filter on comparatively smaller hardware word-length than existing methods. The conventional approaches consider asymptotic stability of a filter with respect to the quantization noise; however, quantization in digital filters can result into bounded oscillation and lead to infeasibility of the asymptotic stability. Therefore, a less conservative stability analysis together with estimation of steady-state region of convergence for an IIR filter is provided. In addition, the conventional approaches, analyzing stability, and steady-state region of convergence, may not guarantee an overflow oscillation-free realization of a filter. Consequently, a condition for estimating the steady-state region of convergence (along with the filter stability) with an additional constraint that the filter’s state should not overflow in the bounded region has been derived. A comparative analysis with conventional methods is provided in simulation results.</P>
Muhammad Modassar Ali Nawaz Ranjha,Bakhtawar Shafique,Lufeng Wang,Shafeeqa Irfan,Muhammad Naeem Safdar,Mian Anjum Murtaza,Muhammad Nadeem,Shahid Mahmood,Ghulam Mueen-ud-Din,Hafiz Rehan Nadeem 경희대학교 융합한의과학연구소 2023 Oriental Pharmacy and Experimental Medicine Vol.23 No.1
Pomegranate (Punica granatum) acts as a therapeutic fruit possessing different bioactive compounds. Different compartments of pomegranate (P. granatum) like seed, peel, juice and leaves are rich in potential bioactive compounds. Pomegranate contains sinapyl, coniferyl, ellagic acid, cinnamic acid, genistein, linoleic acid, anthocyanin, gallic acid, catechin, quercetin, rutin, kaempferol, cyanidin, punicalin, delphinidin, punicalagin, chlorogenic acid, coumaric acid, luteolin and pelletierine alkaloids, flavonoids, anthocyanin and caffeic acid. Pomegranate also exhibits significant anti-oxidative, anti-hypertensive, cardioprotective and anti-diabetic properties and anti-carcinogenic possessions including prevention of prostate cancer; reduction in colon inflammation, prevention of skin tumorigenesis, improvement in renal function and reduction in metastatic melanoma growth. This review summarizes the current available data on the phytochemistry, bioavailability and therapeutic importance of potential bioactive compounds of pomegranate.
Muhammad Riaz,Muhammad Ashraf,Keum-Shik Hong,Gyoung-Hahn Kim,Muhammad Rehan 제어로봇시스템학회 2015 제어로봇시스템학회 국제학술대회 논문집 Vol.2015 No.10
This article addresses the synchronization problem for two different chaotic systems with state time-delays, disturbances, and mutually Lipschitz nonlinearities. For analysis of the two different kind of chaotic oscillators, adaptive control theory, mutually Lipschitz condition and linear matrix inequalities (LMIs) based methodology are utilized to suppress the synchronization error and mismatch between the master-slave chaotic in the presence of disturbances and state delays. A novel adaptive control scheme for the synchronization of such systems is established that guarantees the convergence of the error trajectory and ensures the stability of the synchronization error system. In the end, established adaptive control law is verified by a numerical example of two different, popular in electronics, chaotic Chua’s circuit and Rossler system.
Distributed Consensus Control of One-Sided Lipschitz Nonlinear Multiagent Systems
Rehan, Muhammad,Jameel, Atif,Ahn, Choon Ki IEEE 2018 IEEE transactions on systems, man, and cybernetics Vol.48 No.8
<P>This paper addresses the distributed consensus controller design approaches for one-sided Lipschitz nonlinear multiagents by employing relative state feedback. A new treatment for one-sided Lipschitz nonlinearity is rendered from the consensus control point of view. By employing the quadratic inner-boundedness and the one-sided Lipschitz constraints, a sufficient condition for asymptotic consensus of nonlinear systems under strongly connected communication topologies is provided. Further, a robust consensus protocol design scheme for the nonlinear multiagents is derived by ensuring the <TEX>${L_{2}}$</TEX> stability of the consensus error system. Furthermore, a novel robust consensus control scheme against amplitude-bounded perturbations is developed that guarantees asymptotic convergence of the consensus error into a compact set. Extensions to the proposed methodologies for the leader-following consensus for a spanning tree communication topology with the leader as the root are addressed. In contrast to the conventional consensus control methodologies, this paper is less conservative and can be applied to a broader class of nonlinear multiagent systems. Moreover, the proposed consensus control approach is less conservative for robustness against disturbances owing to its ability to handle amplitude-bounded disturbances and due to the relaxation of a balanced communication topology. A numerical simulation study is provided for the consensus control of eight mobile agents.</P>
Development of High-Efficiency Flexible CZTSe Solar Cell Prepared by Na and K Alkali Doping
Muhammad Rehan(무함마드 레한),Ara Cho(조아라),Awet Mana Amare(아웻 마나 아마래),Kihwan Kim(김기환),Inyoung Jeong(정인영),Jun-Sik Cho(조준식),Joo Hyung Park(박주형),Jae Ho Yun(윤재호),Jihye Gwak(곽지혜),Donghyeop Shin(신동협) 한국신재생에너지학회 2022 한국신재생에너지학회 학술대회논문집 Vol.2022 No.4
Global Formulation and Motion Planning for a Sphere Rolling on a Smooth Surface
Muhammad Rehan,Mahmut Reyhanoglu 제어·로봇·시스템학회 2018 International Journal of Control, Automation, and Vol.16 No.6
This paper studies the motion planning problem for a rolling sphere on an arbitrary smooth manifold embedded in R³. The sphere is allowed to roll on the surface without slipping or twisting. A mathematical model describing the kinematics of the sphere is developed in a geometric form so that the model is globally defined without singularities or ambiguities. An algorithm for constructing a path between specified initial and final configurations is presented. The algorithm utilizes the nonholonomic nature of the system. The theoretical results are specialized for two specific surfaces defined in R³, namely a flat surface and the surface of a stationary sphere.