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Emitter-couple logic circuit design based on the threshold-arithmetic algebraic system

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Journal of Zhejiang University-Science C(Computers and Electronics) 2013年第10期14卷 808-814页

作者： Mao-qun YAO li-bin ZHANG Hangzhou Institute Service Engineering Hangzhou Normal University School of Information Science and Engineering Hangzhou Normal University

Based on the threshold-arithmetic algebraic system which has been proposed for current-mode circuit design,we propose a systematic methodology for emitter-couple logic(ECL)circuit *** to the traditional methodologies and the theory of differential current switches,the proposed methodology uses the HE map and the characteristics of the internal current signals of ECL circuits to determine the external voltage *** operations of the HE map are direct and simple,and the current signals are easy to add or subtract,which make this methodology more flexible,direct,and effective,and make it possible to design arbitrary binary and multi-valued logic *** example circuits are designed and simulated by HSPICE using 0.18μm TSMC *** results confirm the validity of the proposed methodology.

关键词： Threshold-arithmetic algebraic system HE map ECL circuit Current-mode circuits

Volterra filter modeling of a nonlinear discrete-time system based on a ranked differential evolution algorithm

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第8期15卷 687-696页

作者： De-xuan ZOU li-qun GAO Steven li School of Electrical Engineering and Automation Jiangsu Normal University School of Information Science and Engineering Northeastern University Graduate School of Business and Law RMIT UniversityGPO Box 2476 Melbourne 3001 Australia

This paper presents a ranked differential evolution(RDE) algorithm for solving the identification problem of nonlinear discrete-time systems based on a Volterra filter model. In the improved method, a scale factor, generated by combining a sine function and randomness, effectively keeps a balance between the global search and the local search. Also, the mutation operation is modified after ranking all candidate solutions of the population to help avoid the occurrence of premature convergence. Finally, two examples including a highly nonlinear discrete-time rational system and a real heat exchanger are used to evaluate the performance of the RDE algorithm and five other approaches. Numerical experiments and comparisons demonstrate that the RDE algorithm performs better than the other approaches in most cases.

关键词： Ranked differential evolution Identification problem Nonlinear discrete-time systems Volterra filter model Premature convergence

Bayesian Lasso with Neighborhood Regression Method for Gaussian Graphical Model

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Acta Mathematicae Applicatae Sinica 2017年第2期33卷 485-496页

作者： Fan-qun li Xin-sheng ZHANG Department of Statistics School of Management Fudan University Institute of Statistics and Applied Mathematics Anhui University of Finance and Economics

In this paper, we consider the problem of estimating a high dimensional precision matrix of Gaussian graphical model. Taking advantage of the connection between multivariate linear regression and entries of the precision matrix, we propose Bayesian Lasso together with neighborhood regression estimate for Gaussian graphical model. This method can obtain parameter estimation and model selection simultaneously. Moreover, the proposed method can provide symmetric confidence intervals of all entries of the precision matrix.

关键词： gaussian graphical model regression precision matrix Bayesian Lasso Frobenius loss

Effects of Micelle on Pyrazoles as Antioxidants in Radical-induced Oxidation of DNA

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Chemical Research in Chinese Universities 2013年第4期29卷 671-677页

作者： li Yan-feng liU Zai-qun Department of Organic Chemistry College of Chemistry Jilin University Changchun 130021 P. R. China

Effects of 4-（1,3-diphenyl-1H-pyrazol-5-yl）phenol（APP）,4-（1,5-diphenyl-lH-pyrazol-3-yl）phenol（BPP） and 4-（3,5-diphenyl-1H-pyrazol-1-yl）phenol（CPP） on 2,2＇-azobis-（2-amidinopropane hydrochloride）（AAPH）-induced oxidation of DNA were measured in the presence of various concentrations of Triton X-100,cetyltrimethylammonium bromide（CTAB）,or sodium dodecyl sulfate（SDS） in order to clarify the influence of neutral,cationic and anionic microenvironments on antioxidant capacities of APP,BPP and *** these surfactants can protect DNA against AAPH-induced oxidation,the pyrazoles in the presence of these surfactants functioned as prooxidants when the concentrations of Triton X-100 and CTAB ***,CPP exhibited antioxidant property with the increase of the concentration of *** the contrary,APP,BPP and CPP were antioxidants in the presence of various concentrations of *** added surfactants resulted in the complication of the microenvironments around DNA,pyrazoles and peroxyl radical（ROO＊） derived from *** anionic charge of SDS was beneficial to enhancing the antioxidant effectiveness of these *** can be concluded that the charge property of surfactants markedly influenced the behavior of an antioxidant in AAPH-induced oxidation of DNA.

关键词： Pyrazole Surfactant Oxidation DNA Free radical Microenvironment effect

Laboratory Experiments on an Internal Solitary Wave over a Triangular Barrier

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Journal of Ocean University of China 2019年第5期18卷 1061-1069页

作者： MU Haidi CHEN Xu li qun Key Laboratory of Physical Oceanography Ocean University of ChinaQingdao 266100China Polar Research Institute of China Shanghai 200136China

Laboratory experiments were conducted to investigate the evolution of interfacial internal solitary waves(ISWs)incident on a triangular *** with different amplitudes were generated by gravitational *** ISW energy dissipation and turbulence processes were calculated as waves passed over the triangular *** results showed that ISWs were reflecting back off the triangular barrier,and shoaling ISWs led to wave breaking and mixing when waves propagated over the *** instability created the dissipation of energy as it was transmitted from waves to *** rate of ISW energy dissipation,the maximum turbulent dissipation,and the buoyancy diffusivity linearly increased with the increase in the incident wave energy.

关键词： internal solitary waves Particle Image Velocimetry(PIV) turbulent dissipation rate ridge

Study on the Free-Surface Flow of Silicon Melt in the Crucible

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Rare Metals 1989年第1期9卷 39-44页

作者： li, Yingchun Wan, qun Fu, Qin General Research Inst for Non-ferrous Metals China

The flow of a free-surface layer melt in a crucible has been studied by observing the movement of the particle on the free-surface of a silicon melt. A new view on the transportation of impurities in the melt is presented. The experimental results verify the effect of the free-surface layer melt's flow on the distribution of impurities in the as-grown crystal.

关键词： Crystals Growing

Graph Neural Network Based Column Generation for Energy Management in Networked Microgrid

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Journal of Modern Power Systems and Clean Energy 2024年第5期12卷 1506-1519页

作者： Yuchong Huo Zaiyu Chen qun li Qiang li Minghui Yin the School of Automation Nanjing University of Science and TechnologyNanjing 210094China the State Grid Jiangsu Electric Power Co. Ltd.Research InstituteNanjing 211103China

In this paper,we apply a model predictive control based scheme to the energy management of networked microgrid,which is reformulated based on column *** column generation is effective in alleviating the computational intractability of large-scale optimization problems,it still suffers from slow convergence issues,which hinders the direct real-time online *** this end,we propose a graph neural network based framework to accelerate the convergence of the column generation *** acceleration is achieved by selecting promising columns according to certain stabilization method of the dual variables that can be customized according to the characteristics of the ***,a rigorous energy management method based on the graph neural network accelerated column generation model is developed,which is able to guarantee the optimality and feasibility of the dispatch *** computational efficiency of the method is also very high,which is promising for real-time *** conduct case studies to demonstrate the effectiveness of the proposed energy management method.

关键词： Column generation energy management graph neural network machine learning microgrid

Proteomic Analysis of Rice Plasma Membrane-associated Proteins in Response to Chitooligosaccharide Elicitors

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Journal of Integrative Plant Biology 2007年第6期49卷 863-870页

作者： Fang Chen qun li Zuhua He State Key Laboratory of Plant Molecular Genetics Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences the Chinese Academy of Sciences Shanghai 200032 China

Chitooligomers or chitooligosaccharides （COS） are elicitors that bind to the plasma membrane （PM） and elicit various defense responses. However, the PM-bound proteins involved in elicitor-mediated plant defense responses still remain widely unknown. In order to get more information about PM proteins involved in rice defense responses, we conducted PM proteomic analysis of the rice suspension cells elicited by COS. A total of 14 up- or downregulated protein spots were observed on 2-D gels of PM fractions at 12 h and 24 h after COS incubation. Of them, eight protein spots were successfully identified by MS （mass spectrography） and predicted to be associated to the PM and function in plant defense, including a putative PKN/PRK1 protein kinase, a putative pyruvate kinase isozyme G, a putative zinc finger protein, a putative MAR-binding protein MFP1, and a putative calcium-dependent protein kinase. Interestingly, a COS-induced pM5-like protein was identified for the first time in plants, which is a transmembrane nodal modulator in transforming growth factor-β（TGFβ） signaling in vertebrates. We also identified two members of a rice polyprotein family, which were up-regulated by COS. Our study would provide a starting point for functionality of PM proteins in the rice basal defense.

关键词： defense response plasma membrane proteomics rice chitooligosaccharide.

Interaction of an anticyclonic eddy with sea ice in the western Arctic Ocean:an eddy-resolving model study

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Acta Oceanologica Sinica 2013年第3期32卷 54-62页

作者： li qun ZHANG Zhanhai WU Huiding Polar Research Institute of China State Oceanic Administration National Marine Environmental Forecasting Center State Oceanic Administration

The dramatic decline of summer sea ice extent and thickness has been witnessed in the western Arctic Ocean in recent decades, which has motivated scientists to search for possible factors driving the sea ice variability. An eddy-resolving, ice-ocean coupled model covering the entire Arctic Ocean is implemented, with focus on the western Arctic Ocean. Special attention is paid to the summer Maskan coastal current （ACC）, which has a high temperature （up to 5℃ or more） in the upper layer due to the solar radiation over the open water at the lower latitude. Downstream of the ACC after Barrow Point, a surface-intensified anticyclonic eddy is frequently generated and propagate towards the Canada Basin during the summer season when sea ice has retreated away from the coast. Such an eddy has a warm core, and its source is high-temperature ACC water. A typical warm-core eddy is traced. It is trapped just below summer sea ice melt water and has a thickness about 60 m. Temperature in the eddy core reaches 2-3℃, and most water inside the eddy has a temperature over 1℃. With a definition of the eddy boundary, an eddy heat is calculated, which can melt 1 600 km2 of 1 m thick sea ice under extreme conditions.

关键词： eddy-resolving anticyclonic eddy sea ice western Arctic Ocean Alaskan coastal current