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Fixed-Time Cluster Optimization for Multi-Agent Systems Based on Piecewise Power-Law Design

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IEEE/CAA Journal of Automatica Sinica 2024年第5期11卷 1301-1303页

作者： suna Duan Xinchun Jia Xiaobo Chi School of Mathematical Sciences Shanxi UniversityTaiyuan 030006China School of Automation and Software Engineering Shanxi UniversityTaiyuan 030013China

Dear Editor,This letter focuses on the fixed-time(FXT)cluster optimization problem of first-order multi-agent systems(FOMASs)in an undirected network,in which the optimization objective is the sum of the objective functions of all clusters.A novel piecewise power-law control protocol with cooperative-competition relations is ***,a sufficient condition is obtained to ensure that the FOMASs achieve the cluster consensus within an FXT.

关键词： agent cluster optimization

Fixed-Time Cluster Consensus for Multi-Agent Systems with Objective Optimization on Directed Networks

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Journal of Systems Science & Complexity 2023年第6期36卷 2325-2343页

作者： DUAN suna YU Zhiyong JIANG Haijun OUYANG Deqiang College of Mathematics and System Sciences Xinjiang UniversityUrumqi830017China Department of Mathematics The University of Hong KongHong Kong999077China

This paper studies the cluster consensus of multi-agent systems(MASs)with objective optimization on directed and detail balanced networks,in which the global optimization objective function is a linear combination of local objective functions of all ***,a directed and detail balanced network is constructed that depends on the weights of the global objective function,and two kinds of novel continuous-time optimization algorithms are proposed based on time-invariant and timevarying objective ***,by using fixed-time stability theory and convex optimization theory,some sufficient conditions are obtained to ensure that all agents'states reach cluster consensus within a fixed-time,and asymptotically converge to the optimal solution of the global objective ***,two examples are presented to show the efficacy of the theoretical results.

关键词： Cluster consensus directed and detail balanced network multi-agent systems(MASs) objective optimization

自体骨与富血小板纤维蛋白修复牙槽骨重度缺损

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中国组织工程研究 2025年第10期29卷 2044-2051页

作者：刘子略王智宋文尚李苏娜蔡世新衡水市人民医院口腔正畸修复科河北省衡水市053000 衡水市人民医院神经内科河北省衡水市053000

背景:有研究将富血小板纤维蛋白与自体骨联合应用于牙周骨缺损治疗取得了良好效果,但二者联合治疗牙槽骨重度缺损的研究目前较为匮乏。目的:观察自体骨移植与富血小板纤维蛋白联合修复牙槽骨重度缺损的效果。方法:选择2022年4月至2023年... 详细信息

背景:有研究将富血小板纤维蛋白与自体骨联合应用于牙周骨缺损治疗取得了良好效果,但二者联合治疗牙槽骨重度缺损的研究目前较为匮乏。目的:观察自体骨移植与富血小板纤维蛋白联合修复牙槽骨重度缺损的效果。方法:选择2022年4月至2023年2月衡水市人民医院收治的102例牙槽骨重度缺损患者,采取随机数字表法分为对照组(n=51)与观察组(n=51),两组患者均进行引导性组织再生手术,对照组术中采用自体骨填充骨缺损,观察组术中采用自体富血小板纤维蛋白与自体骨填充骨缺损。观察两组临床疗效、手术前后牙齿松动度、牙周微生态环境(探诊深度、临床附着丧失、出血指数)、牙槽骨高度及密度、龈沟液指标(转化生长因子β、丝氨酸蛋白酶抑制剂、基质金属蛋白酶3)变化及不良反应情况。结果与结论:术后6个月,两组治疗有效率比较差异无显著性意义(P> 0.05);观察组患者术后3,6个月的牙齿松动度及牙周探诊深度、临床附着丧失、出血指数均低于对照组(P <0.05),术后6个月的牙槽骨高度高于对照组(P <0.05),术后3,6个月的龈沟液转化生长因子β水平高于对照组(P <0.05),术后3,6个月的龈沟液丝氨酸蛋白酶抑制剂、基质金属蛋白酶3水平均低于对照组(P <0.05)。结果提示:在引导性组织再生手术中,采用自体富血小板纤维蛋白与自体骨联合填充可改善牙槽骨重度缺损患者的牙周微生态环境、减轻牙龈组织炎症、促进牙槽骨组织再生与修复、降低牙齿松动度。

关键词：牙槽骨缺损自体骨富血小板纤维蛋白引导骨组织再生骨移植材料

Effects of compound stimulation of fluid shear stress plus ultrasound on stem cell proliferation and osteogenesis

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Regenerative Biomaterials 2021年第6期8卷 199-208页

作者： Lingzhi Jing suna Fan Xiang Yao Yaopeng Zhang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative MedicineCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620P.R.China Jinan Jinquan Bio-Technology Co.Ltd Jinan 250101P.R.China

Bone tissue with strong adaptability is often in a complex dynamical microenvironment in vivo,which is associated with the pathogenesis and treatment of orthopedic ***,it is of great significance to investigate the effects of corresponding compound stimulation on cell ***,a fluid shear stress(FSS)plus ultrasound stimulation platform suitable for cell studies based on a microfluidic chip was constructed and bone marrow mesenchymal stem cell(BMSC)was chosen as a model *** proliferation and osteogenesis of BMSCs under the compound stimulation of FSS plus ultrasound in growth medium without any soluble induction factors were firstly *** FSS stimulation and static culture conditions were also *** illustrated that suitable single FSS stimulation(about 0.06 dyn/cm^(2))could significantly enhance cell proliferation and osteogenesis simultaneously when compared to the static control,while greater FSS mitigated or even restricted these enhancing ***,ultrasound stimulation combined with this suitable FSS stimulation further accelerated cell proliferation as the intensity of ultrasound *** for the osteogenesis under compound stimulation,it was relatively restricted under lower ultrasound intensity(about 0.075W/cm^(2)),while promoted when the intensity became higher(about 1.75W/cm^(2)).This study suggests that both the cell proliferation and osteogenesis are very responsive to the magnitudes of FSS and ultrasound stimulations and can be both significantly enhanced by proper combination ***,these findings will provide valuable references for the construction of effective cell bioreactors and also the treatment of orthopedic diseases.

关键词： compound stimulation microfluidic chip stem cell cell proliferation cell differentiation

Advances and prospects of triboelectric nanogenerator for self-powered system

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International Journal of Smart and Nano Materials 2021年第3期12卷 233-255页

作者： Xuyao An Chunnan Wang Ruomei Shao Shuqing suna Shenzhen Key Laboratory for Minimal Invasive Medical Technologies Institute of Optical Imaging and SensingDepartment of Biomedical EngineeringShenzhen International Graduate SchoolTsinghua UniversityShenzhenChina Department of Physics Tsinghua UniversityBeijing China

Self-powered technology is a novel power supply *** recent years,self-powered intelligent products have attracted much *** nanogenerators(TENGs)can convert mechanical energy into electrical energy by contact and relative motion,thus providing the possibility of self-powering for electronic ***,TENG-based self-powered technologies are limited by low power output and poor conversion *** this review,we present the development of TENG-based self-powered systems,with the emphasis on the output power of TENG and how to improve *** on the above applications,we propose the idea of TENG-driven self-powered remote robots,providing promising scenarios of small remote robots for land rescue or underwater *** to the limited power output of the current TENGs,there are still some difficulties in driving the *** at the problems of low power supply and poor conversion efficiency,we introduce the current attempts to improve the power generation efficiency from the perspectives of mechanical structure,electrode materials and auxiliary *** also outline the applications of TENGs as power supply systems in various fields such as sensing,wearable devices,and collecting Marine ***,we forecast the development prospect of TENG.

关键词： Triboelectric nanogenerator self-power sensors remote robots

Does ***'s Wort cause regression in gastrointestinal system adenocarcinomas?

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World Journal of Gastrointestinal Oncology 2015年第11期7卷 369-374页

作者： Serap Karaarslan suna Cokmert Atilla Cokmez Department of Pathology Sifa University Faculty of Medicine Department of Medical Oncology Sifa University Faculty of Medicine Department of General Surgary Sifa University Faculty of Medicine

***'s Wort(SJW) is an old herb which has long been consumed widely for its anti-inflammatory,antiviral,and anti-depressive *** we present a detailed clinical evaluation of three cases(two colon and one duodenal adenocarcinoma) with remarkable and intensive lymphoplasmocytic host reaction,at the basal part of tumor,intensive fibrosis,giant cells,plasma cell increase in lymph nodes and few giant cells in germinal centers in resection *** observation of similar host reaction in those tumors having otherwise usual appearance was *** of the cases received neoadjuvant chemoradiotherapy or additional treatment before surgery but only *** cases are presented to increase the awareness about such *** research is needed to reveal the possible effect of SJW,which has long been consumed for different treatment purposes,on human tumors.

关键词： St.John’s Wort Adenocarcinoma Giant cell

Fiber diameters and parallel patterns:proliferation and osteogenesis of stem cells

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Regenerative Biomaterials 2023年第1期10卷 396-410页

作者： Zhanghong Gu suna Fan Subhas CKundu Xiang Yao Yaopeng Zhang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative MedicineCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620People’s Republic of China I3Bs-Research Institute on Biomaterials Biodegradables and BiomimeticsHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineUniversity of MinhoBarcoGuimar~aes 4805-017Portugal

Due to the innate extracellular matrix mimicking features,fibrous materials exhibited great application potential in *** developing excellent fibrous biomaterial,it is essential to reveal the corresponding inherent fiber features’effects on cell *** to the inevitable‘interference’cell adhesions to the background or between adjacent fibers,it is difficult to precisely reveal the inherent fiber diameter effect on cell behaviors by using a traditional fiber mat.A single-layer and parallel-arranged polycaprolactone fiber pattern platform with an excellent non-fouling background is designed and constructed *** this unique material platform,the‘interference’cell adhesions through interspace between fibers to the environment could be effectively ruled out by the non-fouling ***‘interference’cell adhesions between adjacent fibers could also be excluded from the sparsely arranged(SA)fiber *** influence of fiber diameter on stem cell behaviors is precisely and comprehensively investigated based on eliminating the undesired‘interference’cell adhesions in a controllable *** the SA fiber patterns,small diameter fiber(SA-D1,D1 means 1μm in diameter)may seriously restrict cell proliferation and osteogenesis when compared to the middle(SA-D8)and large(SA-D56)ones and SA-D8 shows the optimal osteogenesis enhancement *** the same time,the cells present similar proliferation ability and even the highest osteogenic ability on the densely arranged(DA)fiber patterns with small diameter fiber(DA-D1)when compared to the middle(DA-D8)and large(DA-D56)***‘interference’cell adhesion between adjacent fibers under dense fiber arrangement may be the main reason for inducing these different cell behavior trends along with fiber *** results and comparisons have illustrated the effects of fiber diameter on stem cell behaviors more precisely and objectively,thus providing valuable reference and guidance for developing effecti

关键词： single-layer and parallel arranged fiber patterns non-fouling background cell-fibrous material interaction cell differentiation

Tuning the base properties of Mg–Al hydrotalcite catalysts using their memory effect

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Journal of Energy Chemistry 2020年第7期29卷 229-236,I0008页

作者： Dahye Kwon Ji Yeon Kang suna an Inchan Yang Ji Chul Jung Department of Chemical Engineering Myongji UniversityYongin 17058Republic of Korea

Herein,the relationship between the structure and base properties of Mg–Al hydrotalcite catalysts was comprehensively investigated in relation to heat treatment and rehydration processes,which are well known as memory effects of *** structure of Mg–Al hydrotalcites changed from layered double hydroxide(LDH)to mixed metal oxide and subsequently to a spinel structure during heat treatment,and it was returned from mixed metal oxide to a LDH structure by *** on various characterizations,we successfully proposed a detailed mechanism of memory *** also confirmed that the Mg–Al hydrotalcites had weak or strong base sites and that their base properties could be systematically tuned by heat treatment and *** prepared Mg–Al hydrotalcites were applied to a model reaction,isomerization of glucose to fructose,as base *** the catalysts tested,the rehydrated Mg–Al hydrotalcite efficiently produced fructose due to its appropriate base and structure *** finally concluded that the base sites of Mg–Al hydrotalcites can be designed as desired by heat treatment and ***,through systematic design of the base sites of Mg–Al hydrotalcites,these can be promising catalysts for various heterogeneous reactions over base catalysts,giving excellent catalytic performances.

关键词： Mg–Al hydrotalcite Structure Base properties Heat treatment Rehydration

AIM Study on the Reaction of CH2SH Radical with Fluorine Atom

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Chinese Journal of Chemical Physics 2008年第2期21卷 123-130页

作者： Cui-hong suna Yan-li Zeng Ling-peng Meng Shi-jun Zheng Institute of Computational Quantum Chemistry Hebei Normal University Shijiazhuan& 050016 China Chemistry and Chemical Engineering College Shijiazhuang University Shijiazhuang 050035 China

The reaction of CH2SH radical with fluorine atom was studied at the levels of B3LYP/6-311G（d,p） and MP2（Full）/6-311G（d,p）. The computational results show that the reaction has three channels and proceeds by the addition of fluorine atoms on carbon or sulfur sites of CH2SH, forming initial intermediates. The calculated results show that the channel, in which fluorine attaches to the carbon atom to form CH2S and HF, is the most likely reaction pathway. Topological analysis of electron density was carried out for the three channels. The change trends of the chemical bonds on the reaction paths were discussed. The energy transition states and the structure transition regions （states） of the three channels were found. The calculated results show that the structure transition regions are broad in unobvious exothermic reactions or unobvious endothermic reactions, and are narrow in obvious exothermic reactions or obvious endothermic reactions.

关键词： Radical reaction Energy transition state Structure transition state Structure transition region Topological analysis of electronic density