检索结果-南通市图书馆

Towards net zero carbon buildings:Accounting the building embodied carbon and life cycle-based policy design for Greater Bay Area,China

在线全文

学校读者我要写书评

暂无评论

Geoscience Frontiers 2024年第3期15卷 284-297页

作者： Hanwei liang Xin Bian liang Dong Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Research Center of Urban Sustainable Development/School of Geographical Sciences Nanjing University of Information Science&Technology(NUIST)Nanjing 210044China Department of Architecture and Civil Engineering Chalmers University of TechnologySE-41296 GothenburgSweden Shenzhen Research Institute(SRI) City University of Hong KongShenzhenChina Department of Public and International Affairs(PIA) City University of Hong Kong999077Hong Kong Special Administrative Region School of Energy and Environment(SEE) City University of Hong Kong999077Hong Kong Special Administrative RegionChina Centre for Public Affairs and Law City University of Hong Kong999077Hong Kong Special Administrative RegionChina

Carbon mitigation of buildings is critical to promote a net-zero *** international society has vigorously promoted“Net Zero Carbon Buildings”across the globe,and accounting for building carbon emissions is critical to support this *** carbon,which represents carbon emissions from the entire lifecycle of the buildings,is fundamental for realizing the idea of zero ***,only limited studies have been conducted so far that take into account the city *** paper aimed to act as a first try to account for the embodied carbon emissions in buildings in 2020 for the Guangdong-Hong Kong Macao Greater Bay Area in China(GBA).We integrated remote sensing techniques such as night-time light data(NLT)and building material flows analysis to calculate and spatialize the newly generated building material stocks(MS).Based on the MS data,we further applied life cycle assessment(LCA)to assess the embodied carbon in the *** results highlighted that over 163 million tons of embodied carbon in buildings of GBA are expected to be generated,from 497 million tons of newly generated building MS in *** embodied carbon in each life cycle stage is valuable for further lifecyclebased policy designs for:(i)supporting the updating of the green building certification system with consideration of the embodied carbon;(ii)promoting the green building material application and certification;and(iii)reducing the embodied carbon intensity from compact urban planning policy,such as the urban agglomeration policies in *** goal of this paper was to shed a light on reducing carbon emissions from the perspective of the entire lifecycle and promote the development of net zero carbon buildings in China and Asia-Pacific.

关键词： Net zero carbon building Embodied carbon Life cycle assessment Life cycle-based policies Greater Bay area

Ranking all decision making units based on their elementary differences

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 Engineering and Electronics 2009年第4期20卷 732-740页

作者： Yang Feng liang liang Bi Gongbing Ling Liuyi Management School Univ. of Science and Technology of China Hefei 230026 P. R. China

Traditional DEA-based ranking techniques have some pitfalls such as ignoring the inherent differences among decision making units （DMUs）, or lacking a common weight-based ranking, etc. To overcome these obstacles, the paper first examines the possible differences among all DMUs such as the technical efficiency difference, the preference structure difference and the within-group position difference. Based upon the above differences this paper induces an integrated ranking measurement which helps to give a fair and full ranking for all DMUs under evaluation. Following the three types of differences, this approach behaves greatly elaborately, accurately and reasonably. Finally, the results from the Olympics achievement evaluation approve the acceptability of this approach.

关键词： data envelopment analysis technical efficiency preference structure within-group position cluster analysis ranking.

Integrating dual-role variables in data envelopment analysis

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2010年第5期21卷 771-776页

作者： Feng Yang liang liang Zhaoqiong Li Shaofu Du School of Management University of Science and Technology of China Hefei 230026 P. R. China

Traditional data envelopment analysis（DEA） theory assumes that decision variables are regarded as inputs or outputs,and no variable can play the roles of both an input and an output at the same *** fact,there exist some variables that work as inputs and outputs simultaneously and are called dual-role *** DEA models cannot be used to appraise the performance of decision making units containing dual-role *** paper analyzes the structure and properties of the production systems comprising dual-role variables,and proposes a DEA model integrating dual-role *** the proposed model is illustrated to evaluate the efficiency of university departments.

关键词： data envelopment analysis efficiency evaluation dual-role variable.

Probing dark matter spikes via gravitational waves of extreme-mass-ratio inspirals

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2022年第10期65卷 45-52页

作者： Gen-liang Li Yong Tang Yue-liang Wu University of Chinese Academy of Sciences(UCAS) Beijing 100049China School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUCASHangzhou 310024China International Center for Theoretical Physics Asia-Pacific(ICTP-AP UNESCO)UCASBeijing 100190China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China

The exact properties of dark matter remain largely unknown despite the accumulating evidence. If dark matter is composed of weakly interacting massive particles, it would be accreted by the black hole in the galactic center and form a dense, cuspy *** friction from this spike may have observable effects in a binary system. We consider extreme-mass-ratio inspiral(EMRI) binaries comprising massive black holes harbored in dark matter spikes and stellar mass objects in elliptic orbits. We find that the gravitational-wave waveforms in the frequency domain can be substantially modified. In particular, we show that dark matter can suppress the characteristic strain of a gravitational wave at low frequency but enhance it at a higher *** effects are more dramatic as the dark matter density increases. The results indicate that the signal-to-noise ratio of EMRIs can be strongly reduced near 10^(-3)-0.3 Hz but enhanced near 1.0 Hz with a higher sensitivity, which can be probed via the future space-borne gravitational-wave(GW) detectors, LISA and TAIJI. The findings will have important impacts on the detection and parameter inference of EMRIs.

关键词： dark matter gravitational wave black hole

同方期刊数据库

Reliability Assessment of a New General Matching Composed Network

在线全文

学校读者我要写书评

暂无评论

China Communications 2024年第2期21卷 245-257页

作者： Zhengyuan liang Junbin liang Guoxuan Zhong Guangxi Key Laboratory of Multimedia Communications and Network Technology School of ComputerElectronics and InformationGuangxi UniversityNanning 530004China Jiangxi Engineering Laboratory of IoT Technologies for Crop Growth Ji’an 343000China

The reliability of a network is an important indicator for maintaining communication and ensuring its stable operation. Therefore, the assessment of reliability in underlying interconnection networks has become an increasingly important research issue. However, at present, the reliability assessment of many interconnected networks is not yet accurate,which inevitably weakens their fault tolerance and diagnostic capabilities. To improve network reliability,researchers have proposed various methods and strategies for precise assessment. This paper introduces a novel family of interconnection networks called general matching composed networks(gMCNs), which is based on the common characteristics of network topology structure. After analyzing the topological properties of gMCNs, we establish a relationship between super connectivity and conditional diagnosability of gMCNs. Furthermore, we assess the reliability of g MCNs, and determine the conditional diagnosability of many interconnection networks.

关键词： conditional diagnosability interconnection networks network reliability super connectivity

Study on UV, IR and NMR Spectra of Double Hydrogen-bonded Complexes

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2006年第2期25卷 143-148页

作者： ZHU liang-liang TENG Qi-Wen WU Shi Department of Chemistry Zhejiang University Hangzhou 310027 China

AM 1, PM3 and DPT methods were used to study on the hydrogen-bonded dimer of melamine and [ 1,3] dioxane-2,4,6-trione. The electronic spectra, IR and NMR spectra of some complexes were calculated with INDO/SCI, AM 1 and B3LYP/6-31G（d） methods, respectively. It is demonstrated that the negative stability energy is responsible for the formation of the complexes. Stabilization energies of these complexes were altered among the variations of electric property and steric effects of the monomers. HOMO-LUMO energy gaps were shrunk and the blue-shift of absorptions in the electronic spectra occurred. The vibrations of N-H bonds and chemical shifts of the protons changed with the formation of hydrogen bonds.

关键词： melamine dioxane-2,4,6-trione hydrogen bonds B3LYP

The Faber Operator Acting on BMOA,BMO-Teichmüller Space and Chord-arc Curves

在线全文

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 2359-2387页

作者： Tai liang LIU Yu liang SHEN Department of Mathematics Soochow UniversitySuzhou 215006P.R.China

After reviewing Grunsky operator and Faber operator acting on Dirichlet space,we discuss the boundedness of Faber operator on BMOA,a new subject which turns out to be closely related to the BMO theory of the universal Teichmüller *** particular,we show that the Faber operator acts as a bounded operator on BMOA if the symbol conformal map stays nearly to the base point in the BMO-Teichmüller ***,we obtain several results on quasiconformal mappings,BMOTeichm¨uller space and chord-arc curves as *** by-products,this provides a complex analysis approach to the boundedness of the Cauchy integral acting on BMO functions on a chord-arc curve near to the unit circle in the BMO-Teichmüller space.

关键词： Faber operator quasiconformal mapping quasicircle BMO-Teichmüller space chord-arc curve Grunsky operator BMO BMOA Carleson measure Cauchy integral

Large-eddy simulation and linear acoustic modeling of entropy mode oscillations in a model combustor with coolant injection

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2018年第8期31卷 1691-1702页

作者： Man ZHANG An liang AECC Commercial Aireraft Engine Co. LTD Shanghai 200241 China

Lean-burn combustor is particularly susceptible to combustion instability and the unsteady heat release is usually considered as the excitation of the self-maintained thermoacoustic oscillations. The transverse coolant injection is widely used to reduce the temperature of burnt gas, but on the other hand, it will introduce temperature fluctuation inside the ***, it is necessary to consider the influence of the coolant injection on combustion instability, and evaluate its dynamic feature. In this paper, Large-Eddy Simulation（LES） of the self-excited pressure oscillations in a model combustor with coolant injection is carried out. The analysis of transient flow characteristics and the identification of the pressure modes confirm that one of the low frequency pressure oscillations is related to entropy fluctuations, which is known as rumble combustion instability. The LES results show that transient coolant injection is another excitation of temperature fluctuation other than unsteady combustion. The amplitude of the entropy mode oscillation increases with increasing coolant air mass whereas the change of its frequency is insignificant. According to the major feature of entropy wave oscillation caused by coolant injection, a compact coolant injection model is proposed and applied in the One Dimensional（1 D） Acoustic Network Method（ANM）. Key correlations used in the model match well with LES data in low frequency range. This means that the coolant injection model is a complex one reflecting the interaction of the fluctuating coolant mass, pressure and temperature. Finally, the combustion instability frequencies and modes predicted by acoustic network method are also in good agreement with LES results.

关键词： Acoustic wave Combustion instabilityCoolant injection Entropy LES Network method Rumble Self-excited

Full ranking procedure based on best and worst frontiers

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2015年第3期26卷 514-522页

作者： Feng Yang Fei Du liang liang Liuyi Ling School of Management University of Science and Technology of China

In the traditional data envelopment analysis （DEA） structure, the efficiency score for one decision making unit （DMU） is calculated by measuring the distance of the evaluated DMU to the best practice frontier. Recent researches have provided the reasonability of considering the worst practice frontier as a supple- ment to the traditional DEA techniques. The existing researches take only one type of frontier into account, and they cannot com- pare the evaluated DMU with both the best and the worst perform- ing DMUs. A DEA-based procedure is developed to consider the best and the worst frontiers in the same scenario where the ratio of two distances （RDS） measure is proposed. The principal appli- cation of this approach is for ranking, and, as a complement tool, for performance evaluation. The proposed approach can be used in a wide range of applications such as the performance evaluation of employees and others. Finally, a bookstore data set is used to illustrate the proposed approach.

关键词： data envelopment analysis (DEA) ranking best frontier worst frontier.