检索结果-南通市图书馆

Nanogenerator-Based Self-Powered Sensors for Wearable and Implantable Electronics

在线全文

学校读者我要写书评

暂无评论

Research 2020年第1期2020卷 1576-1600页

作者： Zhe li Qiang Zheng Zhong lin Wang zhou li CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004China School of Material Science and Engineering Georgia Institute of Technology Atlanta GA 30332-0245USA

Wearable and implantable electronics(WIEs)are more and more important and attractive to the public,and they have had positive influences on all aspects of our *** a bridge between wearable electronics and their surrounding environment and users,sensors are core components of WIEs and determine the implementation of their many *** the existing sensor technology has evolved to a very advanced level with the rapid progress of advanced materials and nanotechnology,most of them still need external power supply,like batteries,which could cause problems that are difficult to track,recycle,and miniaturize,as well as possible environmental pollution and health *** the past decades,based upon piezoelectric,pyroelectric,and triboelectric effect,various kinds of nanogenerators(NGs)were proposed which are capable of responding to a variety of mechanical movements,such as breeze,body drive,muscle stretch,sound/ultrasound,noise,mechanical vibration,and blood flow,and they had been widely used as self-powered sensors and micro-nanoenergy and blue energy *** review focuses on the applications of self-powered generators as implantable and wearable sensors in health monitoring,biosensor,human-computer interaction,and other *** existing problems and future prospects are also discussed.

关键词： computer generator attractive

Troubleshooting algorithm for solving assignment problem and its applications

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2013年第1期24卷 165-172页

作者： li zhou Hailin Zou Yancun Yang Qian Gao School of Information and Electrical Engineering Ludong University

A new troubleshooting algorithm for solving assignment problem based on existing algorithms is proposed, and an analysis on the related theory is given. By applying the new troubleshooting algorithm to the Lagrange relaxation algorithm of the multi-dimensional assignment problem of data association for multi-passive-sensor multi-target location systems, and comparing the simulation results with that of the Hungarian algorithm which is the classical optimal solving algorithm, and the multi-layer ordersearching algorithm which is a sub-optimal solving algorithm, the performance and applying conditions of the new algorithm are summarized. Theory analysis and simulation results prove the effectiveness and superiority of the new algorithm.

关键词： assignment problem troubleshooting algorithm data association.

Knudsen cell and smog chamber study of the heterogeneous uptake of sulfur dioxide on Chinese mineral dust

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2014年第12期26卷 2423-2433页

作者： li zhou Weigang Wang Yanbo Gai Maofa Ge Beijing National Laboratory for Molecular Science (BNLMS) State Key Laboratory for Structural Chemistry of Unstable and Stable SpeciesInstitute of Chemistry Chinese Academy of Sciences Beijing National Laboratory for Molecular Science (BNLMS) State Key Laboratory for Structural Chemistry of Unstable and Stable SpeciesPeking University

The heterogeneous uptake processes of sulfur dioxide on two types of Chinese mineral dust（Inner Mongolia desert dust and Xinjiang sierozem） were investigated using both Knudsen cell and smog chamber system. The temperature dependence of the uptake coefficients was studied over a range from 253 to 313 K using the Knudsen cell reactor, the initial uptake coefficients decreased with the increasing of temperature for these two mineral dust samples, whereas the steady state uptake coefficients of the Xinjiang sierozem increased with the temperature increasing, and these temperature dependence functions were obtained for the first time. In the smog chamber experiments at room temperature, the steady state uptake coefficients of SO2 decreased evidently with the increasing of sulfur dioxide initial concentration from 1.72 × 1012 to 6.15 × 1012mol/cm3. Humid air had effect on the steady state uptake coefficients of SO2 onto Inner Mongolia desert *** about the understanding of the uptake processes onto mineral dust samples and the environmental implication were also discussed.

关键词： Mineral dust Sulfur dioxide Uptake coefficient Temperature dependence

Robust nanoporous Cu/TiO_(2) ceramic filter membrane with promoted bactericidal function

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2022年第11期65卷 2687-2694页

作者： zhou li SHI ChunYing XU XiaoHong JIA ChuanCheng Center of Single-Molecule Sciences Institute of Modern OpticsFrontiers Science Center for New Organic Matter Tianjin Key Laboratory of Micro-scale Optical Information Science and TechnologyCollege of Electronic Information and Optical EngineeringNankai UniversityTianjin300350.China School of Chemistry and Chemical Enginering Shandong UniversityJinan 250100China

Filter membrane technology has been extensively used for water ***,due to their high brittleness and biological fouling,filter membranes will gradually *** we develop a robust Cu/TiO_(2) ceramic filter membrane for water treatment,which has excellent inherent antibacterial activities both in the dark and under visible light *** nanobelt TiO_(2) can be sintered into a nanoporous membrane structure by overlapping and interweaving with each other,thereby achieving high flux simultaneously and solving the problem of high brittleness of inorganic ***,such one-dimensional TiO_(2) nanostructures can provide more deposition sites for Cu nanoparticles with inherent antibacterial activity in the *** realise the surface plasmon resonance-enhanced antibacterial activity under visible light,Cu/TiO_(2) heterostructures are used.

关键词： filter membrane one-dimensional TiO_(2) Cu/TiO_(2)heterostructure antibacterial activity

Quorum systems for intrusion-tolerance based on trusted timely computing base

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2010年第1期21卷 168-174页

作者： Hua zhou Xiangru Meng li Zhang Xiangdong Qiao The Telecommunication Engineering Institute Air Force Engineering University Xi'an 710077 E R. China

Quorum systems have been used to solve the problem of data consistency in distributed fault-tolerance systems. But when intrusions occur, traditional quorum systems have some disadvantages. For example, synchronous quorum systems are subject to DOS attacks, while asynchronous quorum systems need a larger system size （at least 3f＋1 for generic data, and f fewer for self-verifying data）. In order to solve the problems above, an intrusion-tolerance quorum system （ITQS） of hybrid time model based on trust timely computing base is presented （TTCB）. The TTCB is a trust secure real-time component inside the server with a well defined interface and separated from the operation system. It is in the synchronous communication environment while the application layer in the server deals with read-write requests and executes update-copy protocols asynchronously. The architectural hybridization of synchrony and asynchrony can achieve the data consistency and availability correctly. We also build two kinds of ITQSes based on TTCB, i.e., the symmetrical and the asymmetrical TTCB quorum systems. In the performance evaluations, we show that TTCB quorum systems are of smaller size, lower load and higher availability.

关键词： network security intrusion-tolerance quorum system trusted timely computing base (TTCB) consistency availability.

Theoretical Investigation of Detailed Thermodynamic Character of Possible Difunctional Adducts Model

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2006年第5期25卷 533-542页

作者： CHANG Guan-Ru zhou li-Xin CHEN Dong Department of Chemistry Jinan University Guangzhou Guangdong 510632 China

The B3LYP/6-31G^＊ level of theory was used to optimize trans-[Pt（NH3）（Am）G-L], where Am = quinoline or thiazole and L is chosen as the model for functional groups of peptide side chains, and for adenine and guanine sites of DNA as the ultimate target of platinum anticancer drugs. Bond dissociating energy and stability energy of complexes are chosen to study detailedly thermodynamic character of possible difunctional adducts model. In order to investigate the influence of a polarizable environment on the energy of the Pt-L bond formation, we adopt a new bonding energy formula brought forward by lippard and his coworkers： △H（Sol） = △H（SCF）＋ △G（Solv）, which is quite appropriate to compare with what is found in experimental studies. Our calculated results demonstrate that N-containing ligands are more favored in view of thermodynamics both in gas phrase and in solution. However, it is worthly to be noted that addition of solvation free energies result in moderate correction of bonding energy in relative ordering, and the largest ones both present in imidazole ligand, not in guanine ligand. Finally, the nature of bond is analyzed in terms of partial charges distribution based on NBO population.

关键词： nonclassical transplatin antitumor drug difunctional adduct DFT

Comparison of adaptive structural damage identification techniques in nonlinear hysteretic vibration isolation systems

在线全文

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2013年第4期12卷 659-667页

作者： Mu Tengfei zhou li Jann N.Yang State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and Astronautics Department of Civil and Environmental Engineering University of California

Early structural damage identification to obtain an accurate condition assessment can assist in the reprioritization of structural retrofitting schedules in order to guarantee structural safety. Nowadays, seismic isolation technology has been applied in a wide variety of infrastructure, such as buildings, bridges, etc., and the health conditions of these nonlinear hysteretic vibration isolation systems have received considerable attention. To effectively detect structural damage in vibration isolation systems based on vibration data, three time-domain analysis techniques, referred to as the adaptive extended Kalman filter （AEKF）, adaptive sequential nonlinear least-square estimation （ASNLSE） and adaptive quadratic sum-sqnares error （AQSSE）, have been investigated. In this research, these analysis techniques are compared in terms of accuracy, convergence and efficiency, for structural damage detection using experimental data obtained through a series of laboratory tests based on a base-isolated structural model subjected to E1 Centro and Kobe earthquake excitations. The capability of the AEKF, ASNLSE and AQSSE approaches in tracking structural damage is demonstrated and compared.

关键词： structural health monitoring parameter identification damage tracking nonlinear hysteretic system experimental verification

Effect of Si content on impact-abrasive wear resistance of Al2O3p/steel composites prepared by squeeze casting

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2018年第9期25卷 984-994页

作者： De-hong Lu Hai-zhou li Bo Ren Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093 Yunnan China

The 40Cr steel matrix composites were reinforced with Al203 particulates （Al2O3p） through Si adding to improve the impact-abrasive wear resistance, in which Si powder ranging up to 25% of the AlzO3p weight was added into the Al2O3p preforms; then, the composites were fabricated by squeeze casting. For all composites, alumina particles are evenly distributed, and Si powder is dissolved in the matrix. Without Si powder addition, the 40Cr steel matrix contains only pearlite; however, ferrite appears and increases with Si powder addition. In the impact-abrasive wear tests, the impact frequency is 80 min^-1 and the impacting energy is 2 J. With increasing Si powder, the wear of the composites first decreases obviously, reaches the minimum at 10% and then increases. The effect of Si addition on the wear resistance can be attributed to two reasons： one is increasing the hardness of the matrix, and the other is improving the interfacial bonding between Al2O3p and steel. The wear mechanism of the composites is abrasive wear when the Si powder is 〈 10 wt%. Otherwise, it is a mixed mode of abrasive and delamination wear.

关键词： Steel matrix composite Si Impact-abrasive wear Wear mechanism Al2O3 particulate Squeeze casting

Nonlocal optical conductivity of Fermi surface nesting materials

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2023年第4期66卷 112-123页

作者： Xiamin Huang Xiao Jiang Bing Huang zhou li GBA Branch of Aerospace Information Research Institute Chinese Academy of SciencesGuangzhou 510700China Beijing Computational Science ResearchCenter Beijing 100193China University of Chinese Academy of Sciences Beijing 100049China Guangdong Provincial Key Laboratory of Terahertz Quantum Electromagnetics Guangzhou 510700China

We investigate the nonlocal optical conductivity of Fermi surface nesting materials that support charge density waves(CDWs)or spin density waves(SDWs).The nonlocal optical conductivity contains information on correlations in electron fluids,which could not be accessed by standard optical probes.A half-metal emerges from doping a CDW,and similarly,a spin-valley halfmetal emerges from doping an *** on the parabolic band approximation,we find that the Drude peak is shifted to a higher frequency and splits into two peaks in the nonlocal optical *** attribute this to the two Fermi velocities in the half-metal or spin-valley half-metal states.

关键词： density functional theory near-field spectroscopy charge density wave optical conductivity