检索结果-南通市图书馆

Horizontal Mergers between Asymmetric Low-Carbon Manufacturers

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 Science and Systems Engineering 2022年第5期31卷 619-647页

作者： Xiaogang lin Kangning Jin Wenhui fu Qiang lin School of Management Guangdong University of Technology Guangzhou 510520China School of Economics and Management South China Normal UniversityGuangzhou 510006China

Mergers have become an important means for low-carbon manufacturers to improve their efficiency and *** paper studies the impact of horizontal mergers between asymmetric low-carbon manufacturers on product diversity,profits,consumer surplus,and the *** the premerger model,we consider two asymmetric manufacturers in terms of market potential that produce two products and compete on prices and carbon *** the postmerger model,the two asymmetric manufacturers merge into one *** merged manufacturer can either continue to produce two products and collude on both products'prices and carbon emissions or enjoy both production and green technology investment cost savings to produce only one *** result suggests that when the merged manufacturer produces two products,the merger does not necessarily lead to higher prices,which stands in sharp contrast to the conventional ***,the merger always benefits the manufacturer but harms *** the merged manufacturer chooses to produce only one product,however,we confirm that the merger can lead to a win-win-win outcome,i.e.,the manufacturer,customers,and environment all become better off if either the production or investment savings are *** conventional wisdom shows that salient costing savings lead to price ***,we show that the merged manufacturer can charge consumers higher prices to provide lower-emission *** addition,we show that improving investment(production)cost savings is more effective for the merged manufacturer if these two cost savings are salient(not salient).Finally,the merged manufacturer should not reduce diversity if these two cost savings are relatively low because the profit and consumer surplus may be simultaneously *** also extend our base model to the case where there exist three manufacturers in the premerger model and the merged firm still operates in a competitive market.

关键词： Game theory asymmetric horizontal merger low-carbon manufacturing price and emission collusions productionand investmentcost synergies

Quasi-periodically Forced Logistic Map with Weak Liouvillean Frequency

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

Acta Mathematica Sinica,English Series 2024年第10期40卷 2411-2435页

作者： Jin Hao LIANG lin lin fu Department of Applied Mathematics Nanjing Forestry UniversityNanjing 210037P.R.China School of Mathematics and Statistics Shaoguan UniversityShaoguan 512005P.R.China

Consider a class of quasi-periodically forced logistic maps T×[0,1]■:(θ,x)→(θ+ω,c(θ)x(1-x))(T=R/Z),whereωis an irrational frequency and c(θ)is a specific bimodal *** prove that under weak Liouvillean condition on frequency,the strange non-chaotic attractor occurs with negative Lyapunov *** extends the result in[Bjerklov,CMP,2009].

关键词： Quasi-periodically forced logistic map strange non-chaotic attractor weak Liouvillean frequency Lyapunov exponent

Joint Continuity of Lyapunov Exponent for Finitely Smooth Quasi-periodic Schrodinger Cocycles

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2021年第7期37卷 1131-1142页

作者： Jin Hao LIANG lin lin fu Department of Applied Mathematics Nanjing Forestry UniversityNanjing 210037P.R.China Department of Mathematics Sun Yat-sen UniversityGuangzhou 510275P.R.China

We prove the joint continuity of Lyapunov exponent in the energy and the Diophantine frequency for quasi-periodic Schrodinger cocycles with the C^(2)cos-type *** particular,the Lyapunov exponent is log-Holder continuo... 详细信息

关键词： Schrodinger cocycle Lyapunov exponent C^(2)cos-type potential

A Survey on Distributed Network Localization from a Graph Laplacian Perspective

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2024年第1期37卷 273-293页

作者： HAN Zhimin lin Zhiyun fu Minyue Artificial Intelligence Institute School of AutomationHangzhou Dianzi UniversityHangzhou 310018China Shenzhen Key Laboratory of Control Theory and Intelligent Systems School of System Design and Intelligent ManufacturingSouthern University of Science and TechnologyShenzhen 518055China Peng Cheng Laboratory Shenzhen 518000China

Network localization serves as a fundamental component for enabling various position based operations in multi-agent systems,facilitating tasks like target searching and formation control by providing accurate position information for all nodes in the *** localization focuses on the challenge of determining the positions of nodes within a network,relying on the known positions of anchor nodes and internode relative *** the past few decades,distributed network localization has garnered significant attention from *** paper aims to provide a review of main results and advancements in the field of distributed network localization,with a particular focus on the perspective of graph *** to its favorable characteristics,graph Laplacian unifies various network localization,even when dealing with diverse types of internode relative measurements,into a unified protocol framework,which can be constructed by a linear method and ensure the global convergence.

关键词： Distributed network localization graph Laplaian sensor network

Evaluation of health benefit using Ben MAP-CE with an integrated scheme of model and monitor data during Guangzhou Asian Games

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2016年第4期28卷 9-18页

作者： Dian Ding Yun Zhu Carey Jang Che-Jen lin Shuxiao Wang Joshua fu Jian Gao shuang Deng Junping Xie Xuezhen Qiu Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control College of Environmental and Energy South China University of Technology Guangzhou Higher Education Mega Center Guangzhou 510006 China. State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084 China USEPA/Office of Air Quality Planning & Standards RTP NC27711 USA Department of Civil Engineering Lamar University Beaumont TX 77710-0024 USA Department of Environmental Science and Engineering Tsinghua University Beijing 100084 China Department of Civil & Environmental Engineering University of Tennessee Knoxville TN 37996-2010 USA Chinese Research Academy of Environmental Sciences Beijing 100012 China

Guangzhou is the capital and largest city（land area：7287 km2）of Guangdong province in South *** air quality in Guangzhou typically worsens in November due to unfavorable meteorological conditions for pollutant *** the Guangzhou Asian Games in November 2010,the Guangzhou government carried out a number of emission control measures that significantly improved the air *** this paper,we estimated the acute health outcome changes related to the air quality improvement during the 2010 Guangzhou Asian Games using a next-generation,fully-integrated assessment system for air quality and health *** advanced system generates air quality data by fusing model and monitoring data instead of using monitoring data alone,which provides more reliable *** air quality estimates retain the spatial distribution of model results while calibrating the value with *** results show that the mean PM2.5concentration in November 2010 decreased by 3.5μg/m^3 compared to that in 2009 due to the emission control *** the analysis,we estimate that the air quality improvement avoided 106 premature deaths,1869 cases of hospital admission,and 20,026 cases of outpatient *** overall cost benefit of the improved air quality is estimated to be 165 million CNY,with the avoided premature death contributing 90%of this *** research demonstrates that Ben MAP-CE is capable of assessing the health and cost benefits of air pollution control for sound policy making.

关键词： Air quality Health benefit PM2.5 Ben MAP-CE Data fusion Model and monitor data

Experimental and numerical studies of a lean-burn internally-staged combustor

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2014年第3期27卷 488-496页

作者： fu Zhenbo lin Yuzhen Li lin Zhang Chi National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics School of Energy and Power Engineering Beihang University

A lean-burn internally-staged combustor for low emissions that can be used in civil avi-ation gas turbines is introduced in this paper. The main stage is designed and optimized in terms of fuel evaporation ratio, fuel/air pre-mixture uniformity, and particle residence time using commer-cial computational fluid dynamics （CFD） software. A single-module rectangular combustor is adopted in performance tests including lean ignition, lean blowout, combustion efficiency, emis-sions, and combustion oscillation using aviation kerosene. furthermore, nitrogen oxides （NOx） emission is also predicted using CFD simulation to compare with test results. Under normal inlet temperature, this combustor can be ignited easily with normal and negative inlet pressures. The lean blowout fuel/air ratio （LBO FAR） at the idle condition is 0.0049. The fuel split proportions between the pilot and main stages are determined through balancing emissions, combustion efficiency, and combustion oscillation. Within the landing and take-off （LTO） cycle, this combustor enables 42%NOx reduction of the standard set by the 6th Committee on Aviation Environmental Protection （CAEP/6） with high combustion efficiency. The maximum board-band pressure oscillations of inlet air and fuel are below 1%of total pressure during steady-state operations at the LTO cycle specific conditions.

关键词： CFD Combustor Gas turbine Low emission NOx

Analysis of the Relationship between the Cloud Water Path and Precipitation Intensity of Mature Typhoons in the Northwest Pacific Ocean

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2020年第4期37卷 359-376页

作者： shuang LUO Yunfei fu Shengnan ZHOU Xiaofeng WANG Dongyong WANG School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China Shanghai Ecological Forecasting and Remote Sensing Center Shanghai 200030China Anhui Meteorological Observatory Hefei 230026China

The relationship between precipitation intensity and cloud water in typhoon systems remains *** study combined time-and space-synchronized precipitation and spectral data obtained by the Precipitation Radar(PR)as well as the Visible and Infrared Scanner(VIRS)onboard the TRMM satellite,to overcome the limitations of precipitation properties and cloud parameters not being synchronized in previous studies.A merged dataset of near-surface rain rate(RR)and corresponding cloud water path(CWP)was established and used to analyze the potential correlation between cloud microphysical properties and precipitation,to deepen our understanding of the evolution of cloud to *** addition,25 collocated satellite overpasses of mature typhoon cases in the Northwest Pacific Ocean from 1998 to 2012 were obtained,and the relationships between the CWP and RR of 144515 pixels were analyzed in *** results show that the CWP and RR of mature typhoon systems with different precipitation types,precipitation cloud phases,and vertical depths of precipitation can be fitted by a notable sigmoid function,which may be useful for estimating CWP and parameterizing precipitation in ***,the relationship was applied and tested with an independent sample to show that RR is a significant indicator of CWP.

关键词： cloud water path convective precipitation stratiform precipitation TRMM tropical cyclone

Aircraft engine fault detection based on grouped convolutional denoising autoencoders

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2019年第2期32卷 296-307页

作者： Xuyun fu Hui LUO Shisheng ZHONG lin lin Department of Mechanical Engineering Harbin Institute of Technology at Weihai School of Mechatronics Engineering Harbin Institute of Technology

Many existing aircraft engine fault detection methods are highly dependent on performance deviation data that are provided by the original equipment manufacturer. To improve the independent engine fault detection ability, Aircraft Communications Addressing and Reporting System(ACARS) data can be used. However, owing to the characteristics of high dimension, complex correlations between parameters, and large noise content, it is difficult for existing methods to detect faults effectively by using ACARS data. To solve this problem, a novel engine fault detection method based on original ACARS data is proposed. First, inspired by computer vision methods, all variables were divided into separated groups according to their correlations. Then, an improved convolutional denoising autoencoder was used to extract the features of each group. Finally, all of the extracted features were fused to form feature vectors. Thereby, fault samples could be identified based on these feature vectors. Experiments were conducted to validate the effectiveness and efficiency of our method and other competing methods by considering real ACARS data as the data source. The results reveal the good performance of our method with regard to comprehensive fault detection and robustness. Additionally, the computational and time costs of our method are shown to be relatively low.

关键词： Aircraft engines Anomaly detection Convolutional Neural Network(CNN) Denoising autoencoder Engine health management Fault detection

Unbound^(28)O,the heaviest oxygen isotope observed:a cutting-edge probe for testing nuclear models

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2024年第2期35卷 1-2页

作者： Jian-Guo Li Bai-Shan Hu shuang Zhang fu-Rong Xu School of Physics and State Key Laboratory of Nuclear Physics and TechnologyPeking UniversityBeijing 100871China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Southern Center for Nuclear-Science Theory(SCNT) Institute of Modern PhysicsChinese Academy of SciencesHuizhou 516000China

The beyond-dripline oxygen isotopes^(27,28)O were recently observed at RIKEN,and were found to be unbound decaying into^(24)O by emitting *** unbound feature of the heaviest oxygen isotope,^(28)O,provides an excellent test for stateof-the-art nuclear *** atomic nucleus is a self-organized quantum manybody system comprising specific numbers of protons Z and neutrons N.

关键词： testing quantum system