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Journal of Systems Science & Complexity 2020年第1期33卷 1-14页

作者： SONG Qijiang huang zhiyong School of Mathematics Renmin University of ChinaBeijing 100872China

This paper concerns the identification problem of scalar errors-in-variables(EIV)systems with general nonlinear output observations and ARMA observation *** independent and identically distributed(i.i.d.)Gaussian inputs with unknown variance,recursive algorithms for estimating the parameters of the EIV systems are *** general nonlinear observations,conditions on the system are imposed to guarantee the almost sure convergence of the estimates.A simulation example is included to justify the theoretical results.

关键词： ARMA noise α-mixing binary sensor errors-in-variables nonlinear observation recursive estimate stochastic approximation(SA) strongly consistent system identification

Identification of Linear Systems Using Binary Sensors with Random Thresholds

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Journal of Systems Science & Complexity 2024年第3期37卷 907-923页

作者： huang zhiyong SONG Qijiang School of Mathematics Renmin University of ChinaBeijing 100872China School of Mathematics Sino-French InstituteRenmin University of ChinaBeijing 100872China

In this paper,the problem of identifying autoregressive-moving-average systems under random threshold binary-valued output measurements is *** the help of stochastic approximation algorithms with expanding truncations,the authors give the recursive estimates for the parameters of both the linear system and the binary *** reasonable conditions,all constructed estimates are proved to be convergent to the true values with probability one,and the convergence rates are also established.A simulation example is provided to justify the theoretical results.

关键词： α-mixing binary sensor quantized system stochastic approximation stochastic thresh-old strongly consistent system identification

Cu/Co/Cr Nanocomposites Obtained from Hydrotalcite Precursors as Catalysts for Thermal Decomposition of Ammonium Perchlorate

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Acta Metallurgica Sinica(English Letters) 2014年第2期27卷 211-216页

作者： Hongbo Liu zhiyong huang Bingzhi Guo Qingze Jiao zhiyong Xiong School of Chemical Engineering and Materials Science Beijing Institute of Technology Zhuhai School of Chemical Engineering and Environment Beijing Institute of Technology College of Light Industry and Food Sciences South China University of Technology

A series of Cu/Co/Cr nanocomposites with different Cu/Co/Cr molar ratios were obtained by calcination of Cu/ Co/Cr hydrotalcites precursors, which were prepared by a co-precipitation reaction. X-ray diffraction, inductively coupled plasma analysis, and transmission electron microscopy were used to characterize the structure, composition, and mor- phology of Cu/Co/Cr nanocomposites. The results show that Cu/Co/Cr nanocomposites have both CuCr204 and CoCr204 spinel phase. The particle size of Cu/Co/Cr nanocomposites is 15-20 nm and the specific surface area is 95-115 m2/g. Cu/ Co/Cr nanocomposites were used as new catalysts for improving thermal decomposition of ammonium perchlorate （AP）. Their catalytic activities were investigated using differential thermal analysis and thermal gravimetric analyzer coupled with an online mass spectrometer. The results show that the decomposition temperature of AP lowered 132-146℃ by adding 4 wt% Cu/Co/Cr nanocomposites. Catalytic activities of the prepared nanocomposites depend on the calcinations temperature and addition amount of corresponding nanocomposites. The possible catalytic mechanism of Cu/Co/Cr nanocomposites was also studied and discussed.

关键词： Nanocomposite Thermal decomposition Catalytic activities 1

Micromechanical Modeling of Elastic-Viscoplastic Behavior of Armco-Fe at High Strain Rate

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Acta Mechanica Solida Sinica 2016年第6期29卷 655-662页

作者： zhiyong huang Haomin Wang Qingyuan Wang Muhammad Kashif Khan School of Aeronautics and Astronautics Sichuan University Faculty of Engineering Environment and Computing Coventry University

Heterogeneous dynamical stress-strain response of Armco-Fe was investigated at high strain rates through the Split Hopkinson Pressure Bar （SHPB） testing. It was found that the viscoplastic deformation in BCC ferrite grains is affected by the strain rate. Thermal softening and variation in crystal orientations under high-strain-rate loading were used in the elastic-viscoplastic modeling. The micromechanical analysis with self-consistent transition and homogenization was used for estimation of the global impact response of the material. The results from modeling were found in good agreement with the experimental data.

关键词： Armco-Fe high strain rate visco-plastic deformation self consistent SHPB

A ratiometric fluorescent probe for hypoxanthine detection in aquatic products based on the enzyme mimics and fluorescence of cobalt-doped carbon nitride

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Food Science and Human Wellness 2024年第2期13卷 879-884页

作者： Xin Wang Chengyi Hong Zhengzhong Lin zhiyong huang College of Ocean Food and Biological Engineering Jimei UniversityXiamen 361021China

A ratiometric fluorescent probe for hypoxanthine(Hx)detection was established based on the mimic enzyme and fluorescence characteristics of cobalt-doped graphite-phase carbon nitride(Co doped g-C_(3)N_(4)).In addition to emitting strong fluorescence,the peroxidase activity of Co doped g-C_(3)N_(4)can catalyze the reaction of O-phenylenediamine and H_(2)O_(2)to produce diallyl phthalate which can emit yellow fluorescence at 570 *** the decomposition of Hx by xanthine oxidase,Hx can be indirectly detected by the generating hydrogen peroxide based on the measurement of fluorescent ratio I(F_(570)/F_(370)).The linear range was 1.7-272.2 mg/kg(R^(2)=0.997),and the detection limit was 1.52 mg/kg(3σ/K,n=9).The established method was applied to Hx detection in bass,grass carp,and shrimp,and the data were verified by *** result shows that the established probe is sensitive,accurate,and reliable,and can be used for Hx detection in aquatic products.

关键词： Co doped g-C_(3)N_(4) Ratiometric fluorescent probe Hypoxanthine Freshness Aquatic products

The stable isotope geochemical characteristics of dissolved inorganic carbon in northern South China Sea

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Chinese Journal Of Geochemistry 2010年第3期29卷 287-292页

作者： LIU Qiming ZHANG Jinli huang zhiyong huang Ning School of Biotechnology Engineering Jimei University Xiamen 361021 China State Key Laboratory of Marine Environmental Science Xiamen University Xiarnen 361005 China

The isotopic composition of dissolved inorganic carbon (DIC) in marine and estuarine environments has been studied in some detail because of its role in determining the isotopic composition of inorganic/organic matter and its applications to the study of various natural processes. The δ13CDIC values of sea water are controlled by the sources and sinks of carbon and the results from isotope fractionation among solid, dissolved and gaseous phases. In this paper, based on the description of the stable isotope geochemical characteristics of dissolved inorganic carbon in northern South China Sea, the following conclusions were drawn: 1) the δ13CDIC values of natural waters are controlled by the sources and sinks of carbon and the results from isotope fractionation among solid, dissolved and gaseous phases. And the low seawater δ13CDIC values of northern South China Sea are accompanied by a low level of sea primary productivity in this region; 2) according to the parameter relationship (δ13CDIC-1.1 PO4) between δ13CDIC and PO4, it is indicated that northern South China Sea is the source of atmospheric CO2; and 3) nitrogen (N) and phosphorus (P) are the elements which are the basis for phytoplankton growth. Based on the analysis of seawater δ13CDIC values and PO4 and NO3+NO2 concentrations, our data show that N is a limiting nutrient in northern South China Sea.

关键词：同位素地球化学特征溶解无机碳南海北部 Sea 中国稳定二氧化氮浓度同位素组成

Development of a 16S r RNA gene-based microarray for the detection of marine bacterioplankton community

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Acta Oceanologica Sinica 2017年第10期36卷 106-114页

作者： ZHAO Wei WANG Jingjing LIANG Yajie huang zhiyong Tianjin Key Laboratory of Industrial Biological Systems and Process Engineering Tianjin Institute of Industrial Biotechnology Chinese Academy of Sciences

A better understanding of bacterioplankton community shifts following change in marine environments is critical to predict the marine ecosystem function. In order to get a snapshot of the microbial taxonomy profiling of a wide range marine area, a quick, convenient and low cost method would be favorable. In this study, we developed a 16S rRNA gene-based microarray using ARB software, which contained 447 probes targeting 160 families of marine bacteria. The specificity, sensitivity and quantitative capability of this microarray were assessed by single cloned16S rRNA genes. The reliability of this microarray was tested by eight environmental samples. The results showed that the microarray was specific, only 1.16% false results were detected in five single-clone hybridization tests. The microarray could detect DNA samples as few as 1 ng/μL and the signal intensity could reflect the relative abundance of the bacteria in the range of 1 ng/μL to 100 ng/μL of DNA concentration. Hybridization with environmental samples showed that it can discriminate bacterioplankton communities by sites and time. High throughput sequencing results from the eight samples confirmed the hybridization results. It indicated that this developed microarray could be used as a convenient tool to monitor the bacterioplankton community in marine environment.

关键词： microarray bacterioplankton community 16S rRNA gene marine environment

Friction measurement of aircraft wing based on optimized FlowNet2.0

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Chinese Journal of Aeronautics 2023年第11期36卷 91-101页

作者： Hongjiang QIAN zhiyong huang Jian WANG Yeting XU Xiucheng DONG Jiebin SHEN School of Aeronautics and Astronautics Sichuan UniversityChengdu 610065China School of Electrical Engineering and Electronic Information Xihua UniversityChengdu 610039China

Few studies have applied the deep optical flows model to global friction measurements of aircraft *** study used an optimized FlowNet2.0 model to measure friction of wing based on fluorescent oil film,which achieved the first integration of deep learning and friction *** input images of the traditional FlowNet2.0 model were extended to multiple images so that more flow features and details could be with *** is the specific part of optimization that will also further improve the measurement accuracy of *** experimental results show that the optimized FlowNet2.0 model reduces the Mean Absolute Percentage Error(MAPE)error by 8.51%and increases Root Mean Square Error(RMSE)by only 0.0138 when compared to the hybrid optical flow method,which indicate that the optimized FlowNet2.0 model has great potential for friction *** in continuous transonic wind tunnel tests demonstrate that FlowNet2.0 can calculate clearer and more accurate flow velocity than hybrid optical flow,and the solved friction magnitude distribution is consistent with the actual flow,which will be of great practical application in wind tunnel engineering.

关键词： Optical flows Deep learning Friction Wind tunnels Flow velocity Measurement

Liftoff of a New Hovering Oscillating-wing Micro Aerial Vehicle

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Journal of Bionic Engineering 2021年第3期18卷 649-661页

作者： Xiangcong Zhou Deyuan Zhang zhiyong huang Xiaogang Song Hao Liu Lin Feng Institute of Bionic and Micro-Nano Systems School of Mechanical Engineering and AutomationBeihang UniversityBeijing 100191China Beijing Advanced Innovation Center for Biomedical Engineering Beihang UniversityBeijing 100191China Graduate School of Engineerings Chiba University Chiba 263-8522Japan Shanghai Jiao Tong University and Chiba University International Cooperative Research Center Shanghai 200240China

Hovering ability forms the basis for space operations of Micro Aerial Vehicles(MAVs).The problem of uneven load puts high demands on the wing *** this paper,a new hovering-mode for MAVs,inspired by flapping flight in bees and hummingbirds but using high-aspect-ratio and low-stress wings,is *** from the flapping actuations that occur at the wing roots,the two wings are driven back and forth in a straight *** simplify the design and control the angle of attack,passive wing rotation is *** numerical results and analysis show that the maximum stress of the oscillating wing is approximately 1/6 of that of the flapping wing when the lift of the oscillating wing is twice that of the flapping wing.A theoretical aerodynamic model of the kinematics of the vehicle's driving mechanism was developed to fulfill its *** measurements indicate that the vehicle generates a sufficiently high cycle-averaged vertical thrust(71 g)for liftoff at a maximum frequency of 5.56 Hz,thereby validating the proposed aerodynamic ***,liftoff performance is presented to visually demonstrate the vertical take-off capabilities and hovering potential of the aeromechanical solution.

关键词： bioinspired oscillating-wing high aspect ratio low-stress wings micro aerial vehicles vertical take-off and hovering

Nebulized heparin for inhalation injury in burn patients:a systematic review and meta-analysis

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Burns & Trauma 2020年第1期8卷 293-302页

作者： Xiaodong Lan zhiyong huang Ziming Tan Zhenjia huang Dehuai Wang Yuesheng huang Department of burn and plastic surgery Chengdu Second People’s HospitalChengdu610021China Department of Wound Repair Institute of Wound RepairShenzhen People’s Hospitalthe First Affiliated Hospital of South University of Science and Technologyand the Second Clinical Medical College of Jinan UniversityShenzhen518020China

Background:Smoke inhalation injury increases overall burn *** applied heparin attenuates lung injury in burn animal models of smoke *** is uncertain whether local treatment of heparin is benefit for burn patients with inhalation *** systematically reviewed published clinical trial data to evaluate the effectiveness of nebulized heparin in treating burn patients with inhalation ***:A systematic search was undertaken in PubMed,the Cochrane Library,Embase,Web of Science,the Chinese Journals Full-text Database,the China Biomedical Literature Database and the Wanfang Database to obtain clinical controlled trails evaluating nebulized heparin in the treatment of burn patients with inhalation *** and clinical characteristics,interventions and physiological and clinical outcomes were *** Risk of Bias Evaluation Tool and the Newcastle–Ottawa Scale were used to evaluate data *** publication bias was assessed by Egger’s test.A sensitivity analysis was conducted to assess the stability of the *** meta-analysis was conducted in R 3.5.1 ***:Nine trials were eligible for the systematic review and *** heparin can reduce lung injury and improve lung function in burn patients with inhalation injury without abnormal coagulation or bleeding,but the findings are still *** in the heparintreated group was lower than that of the traditional treatment group(relative risk(RR)0.75).The duration of mechanical ventilation(DOMV)was shorter in the heparin-treated group compared to the traditional treatment group(standardized mean difference(SMD)−0.78).Length of hospital stay was significantly shorter than that in the traditional treatment group(SMD−0.42),but incidence rates of pneumonia and unplanned reintubation were not significantly different in the study groups(RRs 0.97 and 0.88,respectively).No statistically significant publication biases were detected f

关键词： Burns Inhalation injury Heparin Systematic review