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Integrated Gas Sensor Based on MEMS

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稀有金属材料与工程 2006年第A3期35卷 173-175页

Integrated gas sensor suspending bridge style micro-structure has been developed on Al_2O_3 new type membrane based on ***_4 gas sensing unit and CO gas sensing unit were fabricated separately on 4 unit array style suspending bridge *** have studied on time-sequence modulation form voltage pulse heating method which forms different work temperature

关键词： Al2O3 membrane micro-structure gas sensor

A new proof of Honeycomb Conjecture by fractal geometry methods

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Frontiers of Mechanical Engineering 2013年第4期8卷 367-370页

作者： tong zhang Kai DING Research Center for Solid Mechanics Beihang University School of Engineering Brown University School of Instrument Science and Optical Engineering Beihang University

Based on fractal geometry,we put forward a concise and straightforward method to prove Honeycomb Conjecture—a classical mathematic *** wins the most efficient covering unit in the twodimensional space,compared with the other two covering units—triangle and *** this point of view,honeycomb is treated as a hierarchical fractal structure that fully fills the ***,the total side length and area are easily calculated and from the results,the covering efficiency of each possible unit is provided quantitatively.

关键词： Honeycomb Conjecture fractal geometry hierarchical fractal structure

Temperate ice layer found in the upper area of Jima Yangzong Glacier,the headstream of Yarlung Zangbo River

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Science Bulletin 2016年第8期61卷 619-621页

作者： tong zhang Minghu Ding Cunde Xiao Dongqi zhang Zhiheng Du Institute of Climate System Chinese Academy of Meteorological SciencesBeijing 100081China State Key Laboratory of Cryospheric Sciences Cold and Arid Regions Environmental and Engineering Research InstituteChinese Academy of SciencesLanzhou 730000China

For the first time we investigate the basal thermal condition in the upper area of Jima Yangzong Glacier, the headstream of Yarlung Zangbo River, using ground-penetrating radar techniques. With common offset and common mid-point surveys we analyze the radar velocities in ice with respect to cold-temperate ice transi- tion surface （0.1751 0.0028 m ns-~） and ice-bedrock interface （0.1657 ＋ 0.0033 m ns-a）, indicating a radar velocity of 0.1410 4- 0.0154 m ns-1 for the temperate ice layer （16.6 ~ 1.8 m）. We estimate that the temperate ice layer has a water content of around 6 % 4- 4 %, suggesting that the Jima Yangzong Glacier, previously known as continental-type, now possibly becomes polythermal.

关键词： Jima Yangzong Glacier YarlungZangbo River - Ground-penetrating radar Radarvelocity - Englacial water content Polythermal

Optimal two-iteration sculling compensation mathematical framework for SINS velocity updating

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Journal of Systems Engineering and Electronics 2014年第6期25卷 1065-1071页

作者： tong zhang Kang Chen Wenxing Fu Yunfeng Yu Jie Yan School of Astronautics Northwestern Polytechnical University

A new two-iteration sculling compensation mathematical framework is provided for modern-day strapdown inertial navigation system（SINS） algorithm design that utilizes a new concept in velocity updating. The principal structure of this framework includes twice sculling compensation procedure using incremental outputs from the inertial system sensors during the velocity updating interval. Then, the moderate algorithm is designed to update the velocity parameter. The analysis is conducted in the condition of sculling motion which indicates that the new mathematical framework error which is smaller than the conventional ones by at least two orders is far superior. Therefore, a summary is given for SINS software which can be designed with the new mathematical framework in velocity updating.

关键词： strapdown inertial navigation system(SINS) two-iteration velocity updating sculling optimized coefficients

Hot spots enriched plasmonic nanostructure-induced random lasing of quantum dots thin film

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Chinese Physics B 2018年第4期27卷 497-502页

作者： Feng Shan Xiao-Yang zhang Jing-Yuan Wu tong zhang Joint International Research Laboratory of Information Display and Visualization School of Electronic Science and Engineering Southeast University Nanjing 210096 China Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology Ministry of Education and School of Instrument Science and Engineering Southeast University Nanjing 210096 China Suzhou Key Laboratory of Metal Nano-Optoelectronic Technology Suzhou Research Institute of Southeast University Suzhou 215123 China

Here,a plasmon-enhanced random laser was achieved by incorporating gold nanostars（NS） into disordered polymer and Cd Se/Zn S quantum dots（QDs） gain medium films,in which the surface plasmon resonance of gold NS can greatly enhance the scattering cross section and bring a large gain *** random distribution of gold NS in the gain medium film formed a laser-mode *** a single-pulse pumping,the scattering center of gold NS-based random laser exhibits enhanced performance of a lasing threshold of 0.8 m J/cm^2 and a full width as narrow as 6 nm at half *** utilizing the local enhancement characteristic of the electric field at the sharp apexes of the gold NS,the emission intensity of the random laser was *** addition,the gold NS showed higher thermal stability than the silver nanoparticles,withstanding high temperature heating up to 200？*** results of metal nanostructures with enriched hot spots and excellent temperature stability have tremendous potential applications in the fields of biological identification,medical diagnostics,lighting,and display devices.

关键词： plasmon gain medium gold nanostars random laser

Silver nanowire ring resonator

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Chinese Science Bulletin 2010年第24期55卷 2649-2651页

作者： GUO Xin zhang XiNing tong LiMin State Key Laboratory of Modern Optical Instrumentation Department of Optical Engineering Zhejiang University Hangzhou 310027 China

We demonstrate a silver nanowire ring resonator with a ring diameter of 10.2μ*** ring cavity is formed by coupling both ends of a 145-nm-diameter single silver nanowire into a closed loop.A Q-factor of 160 and a free spectral range of 10.6 nm are obtained for light centered around 800 *** self-coupled ring structure offers opportunities for realizing compact plasmonic resonators with tight confinement for hybrid optical and plasmonic signal processing.

关键词：银纳米线环形谐振腔自由光谱范围混合信号处理封闭循环共振器耦合腔环结构

Visual exploration of multi-dimensional data via rule-based sample embedding

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Visual Informatics 2024年第3期8卷 53-56页

作者： tong zhang Jie Li Chao Xu College of Intelligence and Computing Tianjin UniversityTianjinChina

We propose an approach to learning sample embedding for analyzing multi-dimensional *** basic idea is to extract rules from the given dataset and learn the embedding for each sample based on the rules it *** approach can filter out pattern-irrelevant attributes,leading to significant visual structures of samples satisfying the same rules in the *** addition,analysts can understand a visual structure based on the rules that the involved samples satisfy,which improves the projection’s pattern *** research involves two methods for achieving and applying the ***,we give a method to learn rule-based embedding for each ***,we integrate the method into a system to achieve an analytical *** on real-world dataset and quantitative experiment results show the usability and effectiveness of our approach.

关键词： Tabular data Multi-dimensional exploration Embedding projection Rule Visual analytics

Efficient and genotype independent maize transformation using pollen transfected by DNA-coated magnetic nanoparticles

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Journal of Integrative Plant Biology 2022年第6期64卷 1145-1156页

作者： Zuo-Ping Wang Zhong-Bao zhang Deng-Yu Zheng tong-tong zhang Xiang-Long Li Chun zhang Rong Yu Jian-Hua Wei Zhong-Yi Wu Beijing Key Laboratory of Agricultural Genetic Resources and Biotechnology Institute of BiotechnologyBeijing Academy of Agriculture and Forestry SciencesBeijing 100097China College of Life Sciences Capital Normal UniversityBeijing 100048China

Current gene delivery methods for maize are limited to specific genotypes and depend on timeconsuming and labor-intensive tissue culture ***,we report a new method to transfect maize that is culture-free and genotype *** enhance efficiency of DNA entry and maintain high pollen viability of 32%-55%,transfection was performed at cool temperature using pollen pretreated to open the germination aperture(40%–55%).Magnetic nanoparticles(MNPs)coated with DNA encoding either red fluorescent protein(RFP),β-glucuronidase gene(GUS),enhanced green fluorescent protein(EGFP)or bialaphos resistance(bar)was delivered into pollen grains,and female florets of maize inbred lines were *** fluorescence was detected in 22%transfected pollen grains,and GUS stained 55%embryos at 18 d after *** fluorescence was detected in both silk filaments and immature *** T1 generation of six inbred lines showed considerable EGFP or GUS transcripts(29%–74%)quantitated by polymerase chain reaction,and 5%–16%of the T1 seedlings showed immunologically active EGFP or GUS ***,1.41%of the bar transfected T1 plants were glufosinate resistant,and heritable bar gene was integrated into the maize genome effectively as verified by DNA *** results demonstrate that exogenous DNA could be delivered efficiently into elite maize inbred lines recalcitrant to tissue culture-mediated transformation and expressed normally through our genotype-independent pollen transfection system.

关键词： exogenous genes genotype independence magnetic nanoparticles maize inbred lines pollen transfection pollen aperture

Self-adaptability and topological deformation of Ganlan architectural heritage:Conservation and regeneration of Lianghekou Tujia village in Western Hubei,China

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Frontiers of Architectural Research 2022年第5期11卷 865-876页

作者： tong zhang Han Xu Chuan Wang School of Architecture Southeast UniversityNanjing210096China Visual Image Research Base of Chinese Nation Southeast UniversityNanjing210096China

The authenticity of architectural heritage is interpreted differently in diverse cultural *** this inspire the conservation and contemporary regeneration of architectural heritage to adapt to the changing needs of modern life and society,rather than static exhibits in museums?This research focuses on Ganlan(pile-built timber construction)architecture to demonstrate how adaptive conservation and regeneration can keep traditional construction systems living and ***,a vernacular architectural archetype in the humid subtropical regions of Asia,has the following common features:free plans with an assembling frame structure,open and interactive envelopes to cope with the hot and damp climate,and stilts to deal with the rugged *** research employed a threefold method of field investigation,topological deformation,and experimental design in examining Lianghekou,a historic Tujia village in Western Hubei,*** findings reveal that Tujia people build their stilt houses with adaptable features to meet the changing functional requirements and variable *** traditions can be transmitted into the contemporary design,as our experimental design *** self-adaptability and topological deformation of Ganlan architectural heritage demonstrate a unique perspective of understanding authenticity,and contribute toward innovative application in the conservation and regeneration of vernacular architecture.

关键词： Self-adaptability Topological deformation Ganlan architecture Stilt house Lianghekou village Vernacular architectural heritage