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Satellite constellation design with genetic algorithms based on system performance

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Journal of Systems Engineering and Electronics 2016年第2期27卷 379-385页

作者： xueying wang Jun Li Tiebing wang Wei An Weidong Sheng College of Electronic Science and Engineering National University of Defense Technology

Satellite constellation design for space optical systems is essentially a multiple-objective optimization problem. In this work, to tackle this challenge, we first categorize the performance metrics of the space optical system by taking into account the system tasks（i.e., target detection and tracking）. We then propose a new non-dominated sorting genetic algorithm（NSGA） to maximize the system surveillance performance. Pareto optimal sets are employed to deal with the conflicts due to the presence of multiple cost functions. Simulation results verify the validity and the improved performance of the proposed technique over benchmark methods.

关键词： space optical system non-dominated sorting genetic algorithm(NSGA) Pareto optimal set satellite constellation design surveillance performance

C60-based clustering scheme for sensor management in STSS

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Journal of Systems Engineering and Electronics 2015年第5期26卷 993-999页

作者： Tiebing wang Miao Li xueying wang Wei An Yiyu Zhou College of Electronic Science and Engineering National University of Defense Technology

Clustering-based sensor-management schemes have been widely used for various wireless sensor networks(WSNs), as they are well suited to the distributive and collaborative nature of WSN. In this paper, a C60-based clustering algorithm is proposed for the specific planned network of space tracking and surveillance system(STSS), where all the sensors are partitioned into 12 clusters according to the C60(or football surface) architecture, and then a hierarchical sensor-management scheme is well ***, the algorithm is applied to a typical STSS constellation,and the simulation results show that the proposed method has better target-tracking performance than the nonclustering scheduling method.

关键词： wireless sensor networks(WSNs) sensor management clustering C60 space tracking and surveillance system(STSS)

Effect of Ga content on corrosion behavior of Mg–Zn-Ga alloys in Hank's solution

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Progress in Natural Science:Materials International 2023年第6期33卷 954-964页

作者： Ziyue Zhang xueying wang Xiaolong Ma Yang Zheng Yan Li School of Materials Science and Engineering Beihang University Zhongfa Aviation Institute Beihang University School of Aeronautics and Astronautics Tiangong University Beijing Advanced Innovation Centre for Biomedical Engineering Beihang University

Mg–Zn-Ga alloys have been studied as potential biodegradable materials with excellent mechanical ***, its corrosion behavior under physiological conditions remains a subject of investigation for future applications. In this study, the corrosion behavior of extruded Mg–2Zn-x Ga(x = 1, 3, 5 and 7 wt%) in Hank’s solution was investigated. The corrosion products formed on the alloy surfaces were characterized by X-ray diffraction spectroscopy(XRD), scanning electron microscope(SEM) and Fourier-transform infrared spectroscopy(FT-IR). The corrosion products layer was found to consist of two distinct layers based on composition. The inner layer contained Mg(OH)2and carbonate, while the outer layer was composed of amorphous phosphate with Ca and Mg. The corrosion products layer exhibited a porous structure and was prone to detachment, particularly in regions undergoing non-uniform corrosion. Non-uniform corrosion behavior, attributed to micro-galvanic corrosion, was observed during the immersion of Mg–2Zn-x Ga alloys. With an increase in Ga content, the increased amount of Mg5Ga2phase intensify the non-uniform corrosion, resulting in an increased corrosion rate.

关键词： Magnesium alloys Mg–Zn-Ga Corrosion Amorphous phosphate

Dielectric Patch Resonator and Antenna

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China Communications 2023年第8期20卷 209-219页

作者： Jianxin Chen xueying wang Shichang Tang Yongle Wu School of Information Science and Technology and Research Center for Intelligent Information TechnologyNantong UniversityNantong 226019China Nantong Research Institute for Advanced Communication Technologies Chongchuan DistrictNantong 226019China School of Electronic Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China

This paper presents an overview of dielectric patch(DP)antennas developed in recent *** employed DP resonator composed of a DP and a bottom substrate is analyzed comprehensively here,enabling the easy realization of a quasi-planar DP *** combines the dual advantages of the conventional microstrip patch(MP)antenna and dielectric resonator(DR)antenna in terms of profile,gain,bandwidth,radiation efficiency,and design ***,the DP antenna inherits the multi-mode characteristic of the DR antenna,thus it has a large number of high-order modes,including TMmn mode and TEmn *** high-order modes are widely applied,for example,by combining with the dominant TM10 mode to expand the bandwidth,or selecting multiple higher-order modes to implement a high-gain ***,the non-radiation high-order modes are also utilized to produce natural radiation null in filtering antenna *** this paper,the design theories and techniques of DP antenna are introduced and investigated,including calculation and control methods of the resonant mode frequencies,analysis of the radiation mechanism,and applications of the multi-mode *** overview could provide guidance for the subsequent antenna design,thus effectively avoid time-consuming optimization.

关键词： dielectric patch(DP)resonator DP antenna radiation mechanism multi-mode characteristic

Autophagy,ferroptosis,pyroptosis,and necroptosis in tumor immunotherapy

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Signal Transduction and Targeted Therapy 2022年第7期7卷 2311-2336页

作者： Weitong Gao xueying wang Yang Zhou Xueqian wang Yan Yu Department of Medical Oncology Harbin Medical University Cancer HospitalHarbin 150081China Department of Otolaryngology Head and Neck Surgery Xiangya HospitalCentral South Universitychangsha 410008China Department of Head and Neck Surgery Harbin Medical University Cancer HospitalHarbin 150081China

In recent years,immunotherapy represented by immune checkpoint inhibitors(ICIs)has led to unprecedented breakthroughs in cancer ***,the fact that many tumors respond poorly or even not to ICIs,partly caused by the absence of tumorinfiltrating lymphocytes(TILs),significantly limits the application of *** these immune“cold”tumors into“hot”tumors that may respond to ICIs is an unsolved question in cancer *** it is a general characteristic of cancers to resist apoptosis,induction of non-apoptotic regulated cell death(RCD)is emerging as a new cancer treatment ***,several studies have revealed the interaction between non-apoptotic RCD and antitumor ***,autophagy,ferroptosis,pyroptosis,and necroptosis exhibit synergistic antitumor immune responses while possibly exerting inhibitory effects on antitumor immune ***,targeted therapies(inducers or inhibitors)against autophagy,ferroptosis,pyroptosis,and necroptosis in combination with immunotherapy may exert potent antitumor activity,even in tumors resistant to *** review summarizes the multilevel relationship between antitumor immunity and non-apoptotic RCD,including autophagy,ferroptosis,pyroptosis,and necroptosis,and the potential targeting application of non-apoptotic RCD to improve the efficacy of immunotherapy in malignancy.

关键词： immunotherapy immunity breakthrough

Synthesis and application of a novel 9,9-diethyl-1,2-diaryl-1,9-dihydrofluoreno[2,3-d]imidazole for blue organic light emitting diode

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Chinese Chemical Letters 2020年第1期31卷 64-66页

作者： xueying wang Zhangcheng Liao Tianqi wang Haixia Lin Zixing wang Yongmei Cui Department of Chemistry College of Sciences.Shanghai UniversityShanghai 200444China Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai UniversityShanghai 200072China

Two novel 2-(4-(9,9-disubstitued-9 H-fluoren-2-yl)phenyl)-9,9-diethyl-l-phenyl-1,9-dihydrofluoreno-[2,3-d]imidazole derivatives 2 a and 2 b were synthesized and *** photophysical and electrochemical properties,thermal stability property,and electroluminescence(EL)performance of 2 b were *** fabricated device based on 2 b doping into 4,4’-N,N’-dicarbazole-biphenyl(5%)as an emitter present a maximum brightness of 1272 cd/m^2 at 4 V with the CIE coordinate of(0.1590,0.0465).

关键词： Fluorene Imidazole Photoluminescence Electroluminescence

Immobilization of carbonic anhydrase for facilitated CO2 capture and separation

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Chinese Journal of Chemical Engineering 2020年第11期28卷 2817-2831页

作者： Zhenhua Wu Yan Nan Yang Zhao xueying wang Shouying Huang Jiafu Shi Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering&TechnologyTianjin UniversityTianjin 300072China School of Environmental Science&Engineering Tianjin UniversityTianjin 300072China Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072China

Carbonic anhydrase(CA)as a typical metalloenzyme in biological system can accelerate the hydration/dehydration of carbon dioxide(CO2,the major components of greenhouse gases),which performer with high selectivity,environmental friendliness and superior ***,the free form of CA is quite expensive(~RMB 3000/100 mg),unstable,and non-reusable as the free form of CA is not easy for recovery from the reaction environment,which severely limits its large-scale industrial *** immobilization may solve these problems at the same *** this context,many efforts have been devoted to improving the chemical and thermal stabilities of CA through immobilization *** recently,a wide range of available inorganic,organic and hybrid compounds have been explored as carrier materials for CA immobilization,which could not only improve the tolerance of CA in hazardous environments,but also improve the efficiency and recovery to reduce the cost of large-scale application of *** excellent reviews about immobilization methods and application potential of CA have been *** contrast,in our review,we stressed on the way to better retain the biocatalytic activity of immobilized CA system based on different carrier materials and to solve the problems facing in practical operations *** concluding remarks are presented with a perspective on constructing efficient CO2 conversion systems through rational combining CA and advanced carrier materials.

关键词： Carbon dioxide Carbonic anhydrase Enzyme immobilization Capture and separation Carrier materials

Creation of cytochrome P450 catalysis depending on a non-natural cofactor for fatty acid hydroxylation

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Journal of Energy Chemistry 2023年第4期79卷 31-36页

作者： Qing Li Xiaojia Guo xueying wang Junting wang Li Wan Haizhao Xue Zongbao K.Zhao Laboratory of Biotechnology Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Dalian Key Laboratory of Energy Biotechnology Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

Cytochrome P450 enzymes catalyze diverse oxidative transformations at the expense of reduced nicotinamide adenine dinucleotide phosphate(NADPH),however,their applications remain limited largely because NADPH is cost-prohibitive for biocatalysis at scale yet tightly regulated in host cells.A highly challenging task for P450 catalysis has been to develop an alternative and biocompatible electrondonating *** we engineered P450 BM3 to favor reduced nicotinamide cytosine dinucleotide(NCDH)and created non-natural cofactor-dependent P450 *** outstanding mutants were identified with over 640-fold NCDH preference improvement and good catalytic efficiencies of over15,000 M^(-1)s^(-1)for the oxidation of the fatty acid probe 12-(para-nitrophenoxy)-*** docking analysis indicated that these mutants bear a compacted cofactor *** fusing with an NCD-dependent formate dehydrogenase,fused proteins functioned as NCDH-specific P450catalysts by using formate as the electron ***,these mutants and fusions catalyzed NCDH-dependent hydroxylation of fatty acids with similar chain length preference to those by natural P450 BM3 in the presence of NADPH and also similar regioselectivity for subterminal hydroxylation of lauric *** P450 BM3 and its variants are catalytically powerful to take diverse substrates and convey different reaction paths,our results offer an exciting opportunity to devise advanced cell factories that convey oxidative biocatalysis with an orthogonal reducing power supply system.

关键词： Biocatalysis Cytochrome P450 Directed evolution Fatty acid hydroxylation Non-natural cofactor Synthetic biology

Synergistic antibacterial photocatalytic and photothermal properties over bowl-shaped TiO_(2)nanostructures on Ti-19Zr-10Nb-1Fe alloy

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Regenerative Biomaterials 2022年第1期9卷 271-279页

作者： Yan Wu Zichao Deng xueying wang Aihua Chen Yan Li School of Materials Science and Engineering Beihang UniversityBeijing 100191China Beihang Hangzhou Innovation Institute Yuhang Beihang UniversityHangzhou 310023China Biomaterials Laboratory of the Medical Device Inspection Institute National Institutes for Food and Drug ControlBeijing 102629China Beijing Advanced Innovation Centre for Biomedical Engineering Beihang UniversityBeijing 100191China

As implant substitutes are increasingly applied to the clinic,the infection caused by implants has become one of the most common complications,and the modification of the antibacterial function of the implant can reduce such *** this work,a well-defined bowl-shaped nanostructure coating with photocatalytic and photothermal synergistic antibacterial properties was prepared on Ti-19Zr-10Nb-1Fe(TZNF)*** coating is obtained by spin-coating and sintering TiO_(2)precursors templated from self-assembled microspheres of polystyrenepoly(4-vinylpyridine)(PS-P4VP)amphiphilic block polymer on TZNF ***-P4VP provides the bowl-shaped TiO_(2)nanostructures doped with C,N elements,reducing the band-gap of TiO_(2),which can absorb near-infrared(NIR)light to release reactive oxygen species and produce photothermal *** bowl structure is expected to enhance the utilization of light via the reflection in the confined *** bowl-shaped surface has 100%antibacterial rates after 30 min of NIR light *** addition to antibacterial properties,the bowl-shaped surface has better hydrophilicity and protein adsorption *** amount of protein adsorbed on TZNF with the bowl-shaped structures was six times that of ***,the bowl-shaped nanostructure can promote the proliferation and adhesion of osteoblasts,the cell proliferation rate was increased by 10–30%.

关键词： bowl-shape TiO_(2) Ti-19Zr-10Nb-1Fe alloy antibacterial photocatalytic photothermal