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SPIRALS IN 2-D GAS DYNAMICS SYSTEMS

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Journal of Computational Mathematics 1999年第5期17卷 463-474页

作者： gu, XC Yang, SL tao, LX Jiamusi Univ Dept Math Jiamusi 154000 Peoples R China Acad Sinica Inst Appl Math Beijing 100080 Peoples R China Concordia Univ Dept Comp Sci Montreal PQ Canada

In this paper, the phenomena of spirals are numerically presented by MmB scheme [1] for initial value problems of 2-D gas dynamics (gamma = 1.4), which include 2-D Riemann problems and continuous initial value problems. The numerical results are well coincide with on the exact solution in [2] and the conjectures on solution structure in [3] for 2-D isentropic and adiabatic flows. In isentropic flow, for high speed rotation (v(0)/c(0) > root 2), there is a region of vacuum at the origin and for low speed rotation (v(0)/c(0) < root 2), there is no vacuum, and for adiabatic flow, the structure of spirals is also discussed.

关键词： spiral MmB scheme conservation laws

Signaling pathways and intervention therapies in sepsis

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Signal Transduction and Targeted Therapy 2021年第12期6卷 3567-3602页

作者： yun-yu Zhang Bo-tao Ning Department of Pediatric Intensive Care Unit Shanghai Children’s Medical CenterSchool of MedicineShanghai Jiao Tong University200127 ShanghaiChina

Sepsis is defined as life-threatening organ dysfunction caused by dysregulated host systemic inflammatory and immune response to *** decades,advanced understanding of host–microorganism interaction has gradually unmasked the genuine nature of sepsis,guiding toward new definition and novel therapeutic *** clinical manifestations and outcomes among infectious patients have suggested the heterogeneity of immunopathology,while systemic inflammatory responses and deteriorating organ function observed in critically ill patients imply the extensively hyperactivated cascades by the host defense *** focusing on microorganism pathogenicity,research interests have turned toward the molecular basis of host *** progress has been made regarding recognition and management of clinical sepsis,incidence and mortality rate remain ***,clinical trials of therapeutics have failed to obtain promising *** far as we know,there was no systematic review addressing sepsis-related molecular signaling pathways and intervention therapy in *** studies have succeeded to confirm novel functions of involved signaling pathways and comment on efficacy of intervention therapies amid ***,few of these studies attempt to elucidate the underlining mechanism in progression of sepsis,while other failed to integrate preliminary findings and describe in a broader *** review focuses on the important signaling pathways,potential molecular mechanism,and pathway-associated therapy in ***-derived molecules interacting with activated cells possess pivotal role for sepsis pathogenesis by dynamic regulation of signaling ***-talk and functions of these molecules are also discussed in ***,potential novel therapeutic strategies precisely targeting on signaling pathways and molecules are mentioned.

关键词： sepsis mentioned finding

Volume of Singular Hyperbolic Sets

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Acta Mathematica Sinica,English Series 2021年第10期37卷 1507-1512页

作者： Dao Fei ZHANG yun tao ZANG Mathematics Institute University of WarwickCoventryCV47ALUK School of Mathematical Sciences East China Normal UniversityShanghai 200062P.R.C

Let X be a C^(1+)vector field on a compact Riemannian manifold M with dimension d≥***Λbe a transitive singular hypebolic set with positive *** show thatΛ=M andΛis a uniformly hyperbolic set without singularities.

关键词： Uniformly hyperbolic singular hyperbolic volume

A New Type of Absorbance Sensors Based on Long-Period Fiber Gratings

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Chinese Physics Letters 2011年第5期28卷 128-131页

作者： LUO tao gu Zheng-Tian Laboratory of Photo-electric Functional Films College of ScienceUniversity of Shanghai for Science and TechnologyShanghai 200093

A new absorbance sensor based on long-period fiber gratings(LPFGs)is presented,The measurand is coated on the cladding of the *** is found that the depth of the stop band of the LPFG spectrum will be strongly affected by the absorbance of the measurand if an optimum coating thickness is *** analysis showsthat within the optimal thickness range,the cladding modes could transform into the overlay modes and interact with the measurand more *** absorbance sensitivity of 7×10^(3)is available when the sensor structure is optimized.

关键词： fiber cladding optimum

Influences of preload on the friction and wear properties of high-speed instrument angular contact ball bearings

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Chinese Journal of Aeronautics 2018年第3期31卷 597-607页

作者： tao ZHANG Xiaoyang CHEN Jiaming gu Zhengliang WANG Research Institute of Bearings Shanghai University Shanghai 200072 China Shanghai Tian An Bearing Co. Ltd Shanghai 201108 China

For starved-oil or solid lubrication of high-speed instrument angular contact ball bearings, friction heating and wear are the main reasons of bearing failures. This paper presents a dynamic wear simulation model to investigate the impacts of different preload methods and the changes of preload caused by wear on bearing wear life. The integral value QV of stress and sliding velocity in the contact ellipses between a ball and the inner and outer races determines friction heating and wear. The changes of QV with the friction coefficient and the wear volume under constantforce preload and fixed-position preload are analyzed. Results show that under the same initial preload, the QV decreases with an increase of the friction coefficient for both preload methods, and the latter is slightly larger. The wear of the ball and the race is equivalent to the ball diameter *** QV of constant-force preload is almost not changed with a decrease of the ball diameter, but for fixed-position preload, the value decreases firstly and then increases substantially due to insufficient preload, and slipping occurs, the ball diameter is reduced by 0.025%, while the preload is reduced by 60.33%. An estimation of the bearing wear life under different preload methods requires a consideration of the changes in the wear rate of bearing parts.

关键词： Angular contact ball bearings Bearing life Dynamic model Preload methods Wear rate

3D fracture modelling and limit state analysis of prestressed composite concrete pipes

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Frontiers of Structural and Civil Engineering 2019年第1期13卷 165-175页

作者： Pengfei HE Yang SHEN yun gu Pangyong SHEN School of Aerospace Engineering and Applied Mechanics Tongji UniversityShanghai 200092China Shanghai SMI Engineering Project Management Co. Ltd.Shanghai 201103China

In this manuscript,we study fracture of prestressed cylindrical concrete *** concrete pipes play a major role in tunneling and underground *** structure is modelled fully in 3D using three-dimensional continuum elements for the concrete structure which beam elements are employed to model the *** allows the method to capture important phenomena compared to a pure shell model of concrete.A continuous approach to fracture is chosen when concrete is subjected to compressive loading while a combined continuous-discrete fracture method is employed in *** model is validated through comparisons with experimental data.

关键词： cylindrical concrete structures limit state analysis 3D fracture modelling prestressed composite pipes reinforced concrete three-point bending test

Experimental study of wind loads on gable roofs of low-rise buildings with overhangs

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Frontiers of Structural and Civil Engineering 2018年第3期12卷 300-317页

作者： Peng HUANG Ling tao Ming gu Yong QUAN i University Shanghai 200092China

Gable roofs with overhangs （eaves） are the common constructions of low-rise buildings on the southeastern coast of China, and they were vulnerable to typhoons from experience. The wind pressure distributions on gable roofs of low-rise buildings are investigated by a series of wind tunnel tests which consist of 99 test cases with various roof pitches, height-depth ratios and width-depth ratios. The block pressure coefficients and worst negative （block） pressure coefficients on different roof regions of low-rise buildings are proposed for the main structure and building envelope, respectively. The effects of roof pitch, height-depth ratio, and width-depth ratio on the pressure coefficients of each region are analyzed in detail. In addition, the pressure coefficients on the roofs for the main structure and building envelope are fitted according to roof pitch, height-depth ratio and width-depth ratio of the low-rise building. Meanwhile, the rationality of the fitting formulas is verified by comparing the fitting results with the codes of different countries. Lastly, the block pressure coefficients and worst negative pressure coefficients are recommended to guide the design of low-rise buildings in typhoon area and act as references for the future＇s modification of wind load codes.

关键词： low-rise building gable roof wind loads wind tunnel test block pressure coefficient load code

Synthesis of flexible inter-plant heat exchanger networks: A decomposition method considering intermedium fluid circles

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CHINESE JOURNAL OF CHEMICAL ENGINEERING 2024年第11期75卷 62-73页

作者： tao, Ran gu, Siwen Liu, Linlin Du, Jian Dalian Univ Technol Sch Chem Engn Inst Proc Syst Engn Dalian 116023 Peoples R China Changzhou Inst Technol Sch Photoelect Engn Changzhou 213032 Peoples R China

The traditional methods for synthesizing flexible heat exchanger networks (HENs) are not directly applicable to inter-plant HEN challenges, primarily due to the spread of system uncertainty across plants via intermedium fluid circles. This complicates the synthesis process significantly. To tackle this issue, this study proposes a decomposed stepwise methodology to facilitate the flexible synthesis of the interplant HENs performing indirect heat integration. A decomposition strategy is proposed to divide the overall network into manageable sub-networks by dissecting the intermedium fluid circles. To address the variability in intermedium fluid temperatures, a temperature fluctuation analysis approach is developed and a heuristic rule is introduced to maintain the temperature feasibility of the intermedium fluids. To ensure adequate flexibility and cost-effectiveness of the designed networks, flexibility analysis and network retrofit steps are conducted through model-based optimization techniques. The efficacy of the method is demonstrated through two case studies, showing its potential in achieving the desired operational flexibility for inter-plant HENs. (c) 2024 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

关键词： Inter-plant heat exchanger networks (HENs) Indirect heat integration Flexible synthesis Flexible analysis Decomposition method

Discrimination-Aware Domain Adversarial Neural Network

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Journal of Computer Science & Technology 2020年第2期35卷 259-267页

作者： yun-yun Wang Jian-Min gu Chao Wang Song-Can Chen Hui Xue College of Computer Science and Engineering Nanjing University of Posts and Telecommunications Nanjing 210046China Jiangsu Key Laboratory of Big Data Security and Intelligent Processing Nanjing 210046China College of Computer Science and Technology/College of Artificial Intelligence Nanjing University of Aeronautics and AstronauticsNanjing 210023China Key Laboratory of Pattern Analysis and Machine Intelligence Ministry of Industry and Information Technology Nanjing 210023China School of Computer Science and Engineering Southeast UniversityNanjing 210096China

The domain adversarial neural network(DANN)methods have been successfully proposed and attracted much attention *** DANNs,a discriminator is trained to discriminate the domain labels of features generated by a generator,whereas the generator attempts to confuse it such that the distributions between domains are *** a result,it actually encourages the whole alignment or transfer between domains,while the inter-class discriminative information across domains is not *** this paper,we present a Discrimination-Aware Domain Adversarial Neural Network(DA2NN)method to introduce the discriminative information or the discrepancy of inter-class instances across domains into deep domain ***2NN considers both the alignment within the same class and the separation among different classes across domains in knowledge transfer via multiple *** results show that DA2NN can achieve better classification performance compared with the DANN methods.

关键词： adversarial learning inter-class separation deep neural network discrimination-aware domain adaptation