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Revealing high-dimensional dynamical symmetry in alignment magnetic resonance

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Science China(Physics,mechanics & Astronomy) 2024年第10期67卷 162-163页

作者： m.Suhail Zubairy Institute for Quantum Science and Engineering(IQSE)and Department of Physics and Astronomy Texas A&M UniversityCollege StationTexas 77843-4242USA

Symmetry permeates throughout science,underlying people's understanding on intriguing physical *** include conserved quantities,critical phenomena and selection *** symmetry,the counterpart of geometrical symmetry or static symmetry referring to the geometrical shape or structure of a physical system,is present in the motion behavior.

关键词： properties symmetry alignment

Distributed H2/H∞ Filter Design for Discrete-Time Switched Systems

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IEEE/CAA Journal of Automatica Sinica 2020年第1期7卷 158-168页

作者： Nezar m.Alyazidi magdi S.mahmoud Systems Engineering Department King Fahd University for Petroleum and Minerals

This paper addresses an infinite horizon distributed H2/H∞ filtering for discrete-time systems under conditions of bounded power and white stochastic signals. The filter algorithm is designed by computing a pair of gains namely the estimator and the coupling. Herein, we implement a filter to estimate unknown parameters such that the closed-loop multi-sensor accomplishes the desired performances of the proposed H2 and H∞ schemes over a finite horizon. A switched strategy is implemented to switch between the states once the operation conditions have changed due to disturbances. It is shown that the stability of the overall filtering-error system with H2/H∞ performance can be established if a piecewise-quadratic Lyapunov function is properly constructed. A simulation example is given to show the effectiveness of the proposed approach.

关键词： Bounded power stochastic disturbance discretetime systems H2/H∞ filtering infinite horizon multi-sensor switched systems

Direct microwave leaching conditions of rare earth elements in fluorescent wastes

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Journal of Rare Earths 2024年第6期42卷 1165-1174,I0007页

作者： A.Bilen B.Birol m.N.Saridede S.S.Kaplan m.S.Sonmez Department of metallurgical and materials Engineering Yildiz Technical UniversityIstanbulTurkey Department of Chemical Engineering and materials Science Stevens Institute of TechnologyNew JereyUSA Department of metallurgical and materials Engineering Istanbul Technical UniversityIstanbulTurkey

The luminescent phosphor powder in the fluorescent lamp constitutes 2%of the lamp’s *** can be mentioned that fluorescent wastes are a crucial raw material to produce rare earth *** the present study,microwave leaching process was conducted to dissolve rare earth elements yttrium(Y),europium(Eu),and remaining rare earth elements(REEs)present in the phosphor powder of the fluorescent *** the yields were *** the microwave leaching process,the effects of the temperature(80-160℃),acid type(hydrochloric acid(HCl),nitric acid(HNO_(3)),sulphuric acid(H_(2)SO_(4))),acid concentration(0.5-6 mol/L),solid to liquid ratio(0.1:10-0.5:10)and reaction time(5-90 min)parameters on leaching efficiencies of varying rare earth elements and calcium were *** highest yield was obtained in the direct microwave leaching of fluorescent waste with the experimental conditions of 6 mol/L HCl,160℃,0.1:10 solid-to-liquid ratio(S:L),and 90 *** energy calculations were made,and kinetic models of the reactions were obtained,and it is observed that Y and Eu dissolution is diffusion-controlled,on the other hand,lanthanum(La),cerium(Ce),and terbium(Tb)were examined to be chemical reaction ***,calcium(Ca)and gadolinium(Gd)seem coherent with the mixed ***,mathematical models of all experimental studies are created with the response surface Box-Behnken method and the correlation coefficients of all the models are over 90%.

关键词： Rare earth elements(REEs) Direct microwave leaching Fluorescent waste Kinetic models Response surface method

Fundamental Issues in Networked Control Systems

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IEEE/CAA Journal of Automatica Sinica 2018年第5期5卷 902-922页

作者： magdi S.mahmoud a mutaz m.Hamdan the systems engineering department king fahd university of petroleum and minerals

Abstract--This paper provides a survey on modeling and theories of networked control systems （NCS）. In the first part, modeling of the different types of imperfections that affect NCS is discussed. These imperfections are quantization errors, packet dropouts, variable sampling/transmission intervals, vari- able transmission delays, and communication constraints. Then follows in the second part a presentation of several theories that have been applied for controlling networked systems. These theories include： input delay system approach, markovian system approach, switched system approach, stochastic system approach, impulsive system approach, and predictive control approach. In the last part, some advanced issues in NCS including decentral- ized and distributed NCS, cloud control system, and co-design of NCS are reviewed. Index Terms--Decentralized networked control systems （NCS）, distributed networked control systems, network constraints, net- worked control system, quantization, time delays.

关键词： Decentralized networked control systems(NCS) distributed networked control systems network constraints networked control system quantization time delays

The role of N-glycosylation in cancer

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Acta Pharmaceutica Sinica B 2024年第3期14卷 1098-1110页

作者： Yu Lin David m.Lubman Department of Surgery University of Michigan Medical CenterAnn ArborMI 48109USA

Despite advances in understanding the development and progression of cancer in recent years,there remains a lack of comprehensive characterization of the cancer *** play an important role in medicine and are involved in various human disease conditions including ***-moieties participate in fundamental cancer processes like cell signaling,invasion,angiogenesis,and *** N-glycosylation significantly impacts cancer processes and targeted therapies in ***,understanding N-glycosylation in a tumor is essential for comprehending disease progression and discovering anti-cancer targets and biomarkers for therapy monitoring and *** review presents the fundamental process of protein N-glycosylation and summarizes glycosylation changes in tumor cells,including increased terminal sialylation,N-glycan branching,and ***,the role of N-glycosylation in tumor signaling pathways,migration,and metabolism are *** and glycopeptides as potential biomarkers for early detection of cancer based on site specificity have been ***,understanding and exploring the cancer glycoproteome,along with its role in medicine,implication in cancer and other human diseases,highlights the significance of N-glycosylation in tumor processes,necessitating further research for potential anticancer targets and biomarkers.

关键词： N-Glycosylated proteins Cancer signaling Cancer angiogenesis Cancer metabolism Cancer biomarkers

A FLEXIBLE OBJECTIVE-CONSTRAINT APPROACH AND A NEW ALGORITHm FOR CONSTRUCTING THE PARETO FRONT OF mULTIOBJECTIVE OPTImIZATION PROBLEmS

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Acta mathematica Scientia 2024年第2期44卷 702-720页

作者： N.HOSEINPOOR m.GHAZNAVI Faculty of mathematical Sciences Shahrood University of TechnologyShahroodIran

In this article, a novel scalarization technique, called the improved objective-constraint approach, is introduced to find efficient solutions of a given multiobjective programming problem. The presented scalarized problem extends the objective-constraint problem. It is demonstrated that how adding variables to the scalarized problem, can lead to find conditions for (weakly, properly) Pareto optimal solutions. Applying the obtained necessary and sufficient conditions, two algorithms for generating the Pareto front approximation of bi-objective and three-objective programming problems are designed. These algorithms are easy to implement and can achieve an even approximation of (weakly, properly) Pareto optimal solutions. These algorithms can be generalized for optimization problems with more than three criterion functions, too. The effectiveness and capability of the algorithms are demonstrated in test problems.

关键词： multiobjective optimization Pareto front scalarization objective-constraint approach proper efficient solution

Double compound combination synchronization among eight n-dimensional chaotic systems

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Chinese Physics B 2018年第8期27卷 150-158页

作者： Gamal m mahmoud Tarek m Abed-Elhameed Ahmed A Farghaly Department of mathematics Faculty of Science Assiut University

Depending on double compound synchronization and compound combination synchronization, a new kind of syn- chronization is introduced which is the double compound combination synchronization （DCCS） of eight n-dimensional chaotic systems. This kind may be considered as a generalization of many types of synchronization. In the communica- tion, based on many of drive and response systems, the transmitted and received signals will be more secure. Using the Lyapunov stability theory and nonlinear feedback control, analytical formulas of control functions are obtained to insure our results. The corresponding analytical expression and numerical treatment are used to show the validity and feasibility of our proposed synchronization scheme. The eight memristor-based Chua oscillators are considered as an example. Other examples can be similarly investigated. The proposed synchronization technique is supported using the mATLAB simula- tion outcomes. We obtain the same results of numerical treatment of our synchronization using simulation observations of our example.

关键词： double compound synchronization compound combination synchronization chaotic system Lya-punov stability

The Triple Helix of innovation as a double game involving domestic and foreign actors

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Journal of Data and Information Science 2024年第1期9卷 82-100页

作者： Eustache mêgnigbêto University of Antwerp Antwerpen 2000Belgium

Purpose:The collaboration relationships between innovation actors at a geographic level may be considered as grouping two separate layers,the domestic and the *** the level of each layer,the relationships and the actors involved constitute a Triple Helix *** paper distinguished three levels of analysis:the global grouping together all actors,the domestic grouping together domestic actors,and the foreign related to only actors from partner ***/methodology/approach:Bibliographic records data from the Web of Science for South Korea and West Africa breakdown per innovation actors and distinguishing domestic and international collaboration are analyzed with game *** core,the Shapley value,and the nucleolus are computed at the three levels to measure the synergy between ***:The synergy operates more in South Korea than in West Africa;the government is more present in West Africa than in South Korea;domestic actors create more synergy in South Korea,but foreign more in West Africa;South Korea can consume all the foreign synergy,which is not the case of West *** limitations:Research data are limited to publication records;techniques and methods used may be extended to other research *** implications:West African governments should increase their investment in science,technology,and innovation to benefit more from the synergy their innovation actors contributed at the foreign ***,the results of the current study may not be sufficient to prove that greater investment will yield benefits from foreign ***/value:This paper uses game theory to assess innovation systems by computing the contribution of foreign actors to knowledge production at an area *** proposes an indicator to this end.

关键词： Triple Helix Game theory Core Shapley value Nucleolus South Korea West Africa

Validation of adherence prediction system for lifestyle interventions in nonalcoholic fatty liver disease

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World Journal of Gastroenterology 2024年第20期30卷 2629-2632页

作者： meer m Chisthi Department of General Surgery Government Medical College PathanamthittaKonni 689691KeralaIndia

This editorial delves into the research article by Zeng et al published in the latest issue of World Journal of *** manuscript contributes significantly to addressing the global health issue of nonalcoholic fatty liver disease(NAFLD)by introducing and validating the Exercise and Diet Adherence Scale(EDAS).The article effectively conveys the importance of the study,highlighting the prevalence of NAFLD,the lack of approved drugs for its treatment,and the crucial role of lifestyle *** use of the Delphi method for scale development and the subsequent evaluation of its reliability add scientific rigor to the *** results demonstrate that the scale is correlated with key lifestyle indicators,which makes it a promising tool for assessing patient adherence to *** identification of specific score thresholds for predicting adherence to daily calorie intake and exercise adds practical value to the *** differentiation among scores indicative of good,average,and poor adherence enhances its clinical *** conclusion,the manuscript introduces EDAS,a valuable instrument that can contribute substantially to the field of NAFLD research and clinical practice.

关键词： Nonalcoholic fatty liver disease Lifestyle interventions Adherence assessment Exercise and Diet Adherence Scale Delphi method