检索结果-南通市图书馆

Science China(Information Sciences) 2022年第2期65卷 218-224页

作者： jiankai ZHU Pengcheng ZHANG Rui yang Zenghui WANG Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China University of Michigan-Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong University

Optical interferometry is a highly sensitive method for detecting the miniscule resonant motion in two-dimensional(2D) nanoelectromechanical systems(NEMS). However, the technique to control the interferometry signal strength has not been fully understood. In this work, we present analytical modeling of an effective method for tuning motion-to-signal responsivity in interferometric detection of 2D molybdenum disulfide(MoS) NEMS resonators. We show that the responsivity can be tuned very efficiently, all the way from maximum to 0, by varying the vacuum gap underneath the 2D membrane electrostatically. We further show that the gate voltage corresponding to 0 responsivity, which means no motion signal can be detected,varies with the MoSthickness, diameter, pre-strain, and initial vacuum gap. Our findings provide an important guideline for optimizing measurement conditions when detecting motion in 2D NEMS structures using laser interferometry.

关键词： MoS$_{2}$ 2D NEMS resonators laser interferometry responsivity

Compressive mechanical properties and shape memory effect of NiTi gradient lattice structures fabricated by laser powder bed fusion

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International Journal of Extreme Manufacturing 2022年第4期4卷 189-205页

作者： Wei Chen Dongdong Gu Jiankai Yang Qin yang Jie Chen Xianfeng Shen Jiangsu Provincial Engineering Laboratory for Laser Additive Manufacturing of High-Performance Metallic Components College of Materials Science and TechnologyNanjing University of Aeronautics and AstronauticsYudao Street 29Nanjing 210016People's Republic of China Institute of Machinery Manufacturing Technology China Academy of Engineering PhysicsMianyangSichuan 621000People's Republic of China

Laser additive manufacturing (AM) of lattice structures with light weight, excellent impact resistance, and energy absorption performance is receiving considerable attention in aerospace, transportation, and mechanical equipment application fields. In this study, we designed four gradient lattice structures (GLSs) using the topology optimization method, including the unidirectional GLS, the bi-directional increasing GLS, the bi-directional decreasing GLS and the none-GLS. All GLSs were manufactureed by laser powder bed fusion (LPBF). The uniaxial compression tests and finite element analysis were conducted to investigate the influence of gradient distribution features on deformation modes and energy absorption performance of GLSs. The results showed that, compared with the 45° shear fracture characteristic of the none-GLS, the unidirectional GLS, the bi-directional increasing GLS and the bi-directional decreasing GLS had the characteristics of the layer-by-layer fracture, showing considerably improved energy absorption capacity. The bi-directional increasing GLS showed a unique combination of shear fracture and layer-by-layer fracture, having the optimal energy absorption performance with energy absorption and specific energy absorption of 235.6 J and 9.5 J g-1 at 0.5 strain, respectively. Combined with the shape memory effect of NiTi alloy, multiple compression-heat recovery experiments were carried out to verify the shape memory function of LPBF-processed NiTi GLSs. These findings have potential value for the future design of GLSs and the realization of shape memory function of NiTi components through laser AM.

关键词： additive manufacturing laser powder bed fusion gradient lattice structures deformation behavior shape memory effect

Cultivation of gut microorganisms of the marine ascidian Halocynthia roretzi reveals their potential roles in the environmental adaptation of their host

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Marine Life Science & Technology 2022年第2期4卷 201-207页

作者： yang yang Yuting Zhu Haiming Liu jiankai Wei Haiyan Yu Bo Dong Ministry of Education Key Laboratory of Marine Genetics and Breeding College of Marine Life SciencesOcean University of ChinaQingdao266003China Laboratory for Marine Biology and Biotechnology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao266237China Institute of Evolution and Marine Biodiversity Ocean University of ChinaQingdao266003China

It has long been known that abundant symbiotic bacteria exist in the tunic and gut of marine ascidians,and that these play crucial roles in host development,physiological metabolism,and environmental adaptation.However,the identity,roles and functions of these symbiotic bacteria are known for only a few strains.In this study,we isolated and cultivated 263 strains of microorganisms from the intestine of the marine ascidian Halocynthia roretzi through a combination of aerobic and anaerobic culture approaches.Most cultivated species,both aerobic and anaerobic,from ascidian stool samples belonged to the genus Bacillus based on 16S rDNA sequencing identification and phylogenetic assays.The distribution of cultured bacteria varied with seasonal changes in environmental conditions.To explore the functions of cultured bacteria,we screened out a strain of Serratia sp.whose extracts showed high antibacterial activity against aquatic pathogens.These findings revealed the potential roles of gut microorganisms in ascidian defense and environmental adaptation,thus providing insights into the interaction and co-evolution between gut bacteria and their hosts.

关键词： Aerobic culture Anaerobic culture Ascidian Defense Gut microorganism

Multitarget tracking control algorithm under local information selection interaction mechanism

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Intelligent and Converged Networks 2021年第2期2卷 91-100页

作者： Jiehong Wu Jinghui yang Weijun Zhang jiankai Zuo School of Computer Science Shenyang Aerospace UniversityShenyang 110136China Department of Computer Science and Technology Tongji UniversityShanghai 201804China

This study focuses on the problem of multitarget tracking.To address the existing problems of current tracking algorithms,as manifested by the time consumption of subgroup separation and the uneven group size of unmanned aerial vehicles(UAVs)for target tracking,a multitarget tracking control algorithm under local information selection interaction is proposed.First,on the basis of location,number,and perceived target information of neighboring UAVs,a temporary leader selection strategy is designed to realize the local follow-up movement of UAVs when the UAVs cannot fully perceive the target.Second,in combination with the basic rules of cluster movement and target information perception factors,distributed control equations are designed to achieve a rapid gathering of UAVs and consistent tracking of multiple targets.Lastly,the simulation experiments are conducted in two-and three-dimensional spaces.Under a certain number of UAVs,clustering speed of the proposed algorithm is less than 3 s,and the equal probability of the UAV subgroup size after group separation is over 78%.

关键词： multitarget tracking time-consuming grouping local information selection interaction temporary leader selection strategy subgroup size

Technical pathways of dual carbon control in China’s buildings sector

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碳中和(英文)

碳中和(英文) 2022年第1期1卷 389-398页

作者： Wei Xu Deyu Sun jiankai Dong Shuai Huang Shuo yang China Institute of Building Environment and Energy China Academy of Building ResearchBeijing 100013PR China School of Architecture Harbin Institute of TechnologyKey Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and TechnologyMinistry of Industry and Information TechnologyHarbin 150090China

Reducing carbon emissions in the buildings sector is of great significance to the realization of China’s carbon peak and neutrality goals.By analyzing factors influencing buildings carbon emissions at the operational stage,this paper applies the China Building Carbon Emission Model(CBCEM)to make medium and long-term forecasts of China’s building operation carbon emissions,discussing the goals and realization paths of China’s dual carbon goals in the buildings sector.The results show that building operation carbon emissions,according to the current development model in the buildings sector,will peak in 2038-2040 with a peak carbon emission of about 3.15 billion tons of CO_(2);however,by 2060,carbon emissions will still be 2.72 billion tons of CO_(2),falling short of China’s dual carbon goals.The carbon saving effects of three scenarios,namely clean grid priority,building photovoltaic priority and energy efficiency enhancement priority,were measured and shown to be significant in all three scenarios,but the building photovoltaic priority and energy efficiency enhancement priority scenarios were superior in comparison.

关键词： Buildings sector Carbon peak Carbon neutrality Forecast model Technical pathways China building carbon emission model

Effect of Different Calcination Temperatures on the Structure and Properties of Zirconium-Based Coating Layer Modified Cathode Material Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_(2)

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Acta Metallurgica Sinica(English Letters) 2022年第6期35卷 985-995页

作者： Zijun Liao jiankai Kang Qi Luo Caifeng Pan Jiangdong Chen Xiaolong Mo Hanbo Zou Wei yang Shengzhou Chen School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China Institute of Energy and Catalysis Guangzhou UniversityGuangzhou 510006China Key Laboratory of Fuel Cell Technology of Guangdong Province Guangzhou 510006China

Lithium-rich manganese-based oxides have the advantages of high discharge specific capacity, so they are potential candidates for advanced lithium battery cathode materials. However, they also have drawbacks to be solved such as serious irreversible loss of capacity and voltage decay in the cycling process. Surface coating method was used in this paper to modify the lithium-rich manganese-based oxide(LRMO,Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_(2)) to improve its electrochemical properties. Zirconium-based compounds coated LRMO materials(ZBC@LRMO) were obtained via the reaction of lithium hydroxide with zirconium n-butanol and subsequent thermal treatment at different temperatures. The results of X-ray diffraction and transmission electron microscopy confirm that the crystal structure and composition of the ZBC coating layer vary with the calcination temperature. The coating layer obtained at 600 ℃ is composed of tetragonal ZrO_(2) and Li_(2)ZrO_(3). The ZBC@LRMO sample with tetragonal ZrO =2 and Li_(2)ZrO_(3) composite exhibits the best electrochemical performance: the discharge capacity of ZBC@LRMO can reach 296 mAh g^(-1) at 0.1 C and 120 mAh g^(-1) at high rate of 5 C.

关键词： Lithium-ion battery Cathode material Zirconium-based compounds coating Calcination temperature Electrochemical performance

Laser Additive Manufacturing of Bio-inspired Metallic Structures

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Chinese Journal of Mechanical Engineering(Additive Manufacturing Frontiers) 2022年第1期1卷 28-38页

作者： Jiankai Yang Dongdong Gu Kaijie Lin Yicha Zhang Meng Guo Luhao Yuan Han Zhang Hongmei Zhang Jiangsu Provincial Engineering Laboratory for Laser Additive Manufacturing of High-Performance Metallic Components College of Materials Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjing 210016China ICB-COMM CNRS UMR 6303UTBM–Universitéde Technologie Belfort-MontbéliardSevenansFrance

High-performance/multifunctional metallic components primarily determine the service performance of equip-ment applied in the aerospace,aviation,and automobile industries.Organisms have developed structures with specific properties over millions of years of natural evolution,thereby providing inspiration for the design of high-performance structures to satisfy the increasing demands of modern industries.From the perspective of manufacturing,the ability of conventional processing technologies is inadequate for fabricating these complex structural configurations.By contrast,laser additive manufacturing(AM)is an effective method for fabricating complex metallic bio-inspired structures owing to its layer-by-layer deposition advantage.Herein,recent devel-opments in the laser AM of bio-inspired cellular,plate,and truss structures,as well as the materials used in laser AM for bio-inspired printing are briefly reviewed.The organisms being imitated include butterfly,Norway spruce,mantis shrimp,beetle,and water spider,which expand the diversity of multifunctional structures for laser AM.The mechanical properties and functions of laser-AM-processed bio-inspired structures are discussed.Additionally,the challenges,possible outcomes,and directions of utilizing laser AM technology to fabricate high-performance/multifunctional metallic bio-inspired structures in the future are outlined.

关键词： Laser additive manufacturing(AM) Laser powder bed fusion(LPBF) Bio-inspired Biomimicry Property Functionality

Biosynthesis and Immunological Evaluation of a Dual-Antigen Nanoconjugate Vaccine Against Brucella melitensis

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Engineering 2023年第10期29卷 95-109页

作者： Jing Huang Yufei Wang Kangfeng Wang Shulei Li Peng Sun Yan Guo jiankai Liu Ruifu yang Ming Zeng Chao Pan Hengliang Wang Li Zhu State Key Laboratory of Pathogen and Biosecurity Beijing Institute of BiotechnologyBeijing 100071China Beijing Minhai Biotechnology Co. Ltd.Beijing 102600China State Key Laboratory of Pathogen and Biosecurity Beijing Institute of Microbiology and EpidemiologyBeijing 100071China The Third Medical Center PLA General HospitalBeijing 100039China College of Life Science Hebei UniversityBaoding 071002China

Brucellosis,caused by Brucella,is one of the most common zoonosis.However,there is still no vaccine for human use.Although some live attenuated vaccines have been approved for animals,the protection effect is not ideal.In this study,we developed a dual-antigen nanoconjugate vaccine containing both polysaccharide and protein antigens against Brucella.First,the antigenic polysaccharide was covalently coupled to the outer membrane protein Omp19 using protein glycan coupling technology,and then it was successfully loaded on a nano-carrier through the SpyTag/SpyCatcher system.After confirming the efficient immune activation and safety performance of the dual-antigen nanoconjugate vaccine,the potent serum antibody response against the two antigens and remarkable protective effect in non-lethal and lethal Brucella infection models were further demonstrated through different routes of administration.These results indicated that the dual-antigen nanoconjugate vaccine enhanced both T helper 1 cell(Th1)and Th2 immune responses and protected mice from Brucella infection.Furthermore,we found that this protective effect was maintained for at least 18 weeks.To our knowledge,this is the first Brucella vaccine bearing diverse antigens,including a protein and polysaccharide,on a single nanoparticle.Thus,we also present an attractive technology for co-delivery of different types of antigens using a strategy applicable to other vaccines against infectious diseases.

关键词： Protein glycan coupling technology(PGCT) Dual-antigen Nanoconjugate vaccine Brucella melitensis

Plasmonic Refractive Index Sensors Based on One-and Two-Dimensional Gold Grating on a Gold Film

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Photonic Sensors 2020年第4期10卷 375-386页

作者： jiankai ZHU Xiangxian WANG Yuan WU Yingwen SU Tianxu JIA Hua yang Liping ZHANG Yunping QI Xiaolei WEN School of Science Lanzhou University of TechnologyLanzhou 730050China College of Physics and Electronic Engineering Northwest Normal UniversityLanzhou 730070China Center for Micro-and Nanoscale Research and Fabrication University of Science and Technology of ChinaHefei 230026China

In this paper,we propose two kinds of composite structures based on the one-and two-dimensional(1D&2D)gold grating on a gold film for plasmonic refractive index sensing.The resonance modes and sensing characteristics of the composite structures are numerically simulated by the finite-difference time-domain method.The composite structure of the 1D gold semi-cylinder grating and gold film is analyzed first,and the optimized parameters of the grating period are obtained.The sensitivity and figure of merit(FOM)can reach 660 RIU/nm and 169 RIU-1,respectively.Then,we replace the 1D grating with the 2D gold semi-sphere particles array and find that the 2D grating composite structure can excite strong surface plasmon resonance intensity in a wider period range.The sensitivity and FOM of the improved composite structure can reach 985 RIU/nm and 298 RIU-1,respectively.At last,the comparison results of the sensing performance of the two structures are discussed.The proposed structures can be used for bio-chemical refractive index sensing.

关键词： Surface plasmon refractive index sensor grating

The secretion profile of mesenchymal stem cells and potential applications in treating human diseases

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Signal Transduction and Targeted Therapy 2022年第4期7卷 1047-1065页

作者： Yuyi Han Jianxin yang jiankai Fang Yipeng Zhou Eleonora Candi Jihong Wang Dong Hua Changshun Shao Yufang Shi Department of Ophthalmology The Affiliated Hospital of Jiangnan University214000 WuxiChina The Third Affiliated Hospital of Soochow University Institutes for Translational MedicineState Key Laboratory of Radiation Medicine and ProtectionKey Laboratory of Stem Cells and Medical Biomaterials of Jiangsu ProvinceMedical College of Soochow University215000 SuzhouChina Department of Experimental Medicine TORUniversity of Rome Tor Vergata00133 RomaItaly IDI-IRCCS 00166 RomeItaly Department of Medical Oncology The Affiliated Hospital of Jiangnan University214000 WuxiChina

Mesenchymal stromal/stem cells(MSCs)possess multi-lineage differentiation and self-renewal potentials.MSCs-based therapies have been widely utilized for the treatment of diverse inflammatory diseases,due to the potent immunoregulatory functions of MSCs.An increasing body of evidence indicates that MSCs exert their therapeutic effects largely through their paracrine actions.Growth factors,cytokines,chemokines,extracellular matrix components,and metabolic products were all found to be functional molecules of MSCs in various therapeutic paradigms.These secretory factors contribute to immune modulation,tissue remodeling,and cellular homeostasis during regeneration.In this review,we summarize and discuss recent advances in our understanding of the secretory behavior of MSCs and the intracellular communication that accounts for their potential in treating human diseases.

关键词： diseases homeostasis potential