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Energy consumption simulations of rural residential buildings considering differences in energy use behavior among family members

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Building Simulation 2024年第8期17卷 1335-1358页

作者： Xi Luo lina Du School of Building Services Science and Engineering Xi'an University of Architecture and Technology(XAUAT)Xi'an 710055China State Key Laboratory of Green Building Xi'an 710055China

The“average occupant”methodology is widely used in energy consumption simulations of residential buildings;however,it fails to consider the differences in energy use behavior among family *** on a field survey on the Central Shaanxi Plain,to identify the energy use behavior patterns of typical families,a stochastic energy use behavior model considering differences in energy use behavior among family members was proposed,to improve the accuracy of energy consumption simulations of residential *** results indicated that the surveyed rural families could be classified into the following four types depending on specific energy use behavior patterns:families of one elderly couple,families of one middle-aged couple,families of one elderly couple and one child,and families of one couple and one ***,on typical summer days,the results of daily building energy consumption simulation obtained by the“average occupant”methodology were 25.39%and 28%lower than the simulation results obtained by the model proposed in this study for families of one elderly couple and families of one middle-aged couple,and 13.05%and 23.05%higher for families of one elderly couple and one child,and families of one couple and one *** typical winter days,for the four types of families,the results of daily building energy consumption simulation obtained by the“average occupant”methodology were 21.69%,10.84%,1.21%,and 8.39%lower than the simulation results obtained by the model proposed in this study,respectively.

关键词： typical energy use behavior pattern differences in occupant behavior building energy consumption simulation stochastic energy use behavior simulation

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Improved encoding structure and decoding algorithms for spinal codes

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Journal of Systems Engineering and Electronics 2022年第4期33卷 856-866页

作者： HUANG Wensha WANG lina School of Computer and Communication Engineering University of Science and Technology BeijingBeijing 100083China Shunde Graduate School University of Science and Technology BeijingBeijing 100083China

To improve the error correction performance, an innovative encoding structure with tail-biting for spinal codes is designed. Furthermore, an adaptive forward stack decoding(A-FSD) algorithm with lower complexity for spinal codes is proposed. In the A-FSD algorithm, a flexible threshold parameter is set by a variable channel state to narrow the scale of nodes accessed. On this basis, a new decoding method of AFSD with early termination(AFSD-ET) is further proposed. The AFSD-ET decoder not only has the ability of dynamically modifying the number of stored nodes, but also adopts the early termination criterion to curtail complexity. The complexity and related parameters are verified through a series of simulations. The simulation results show that the proposed spinal codes with tail-biting and the AFSD-ET decoding algorithms can reduce the complexity and improve the decoding rate without sacrificing correct decoding performance.

关键词： spinal code tail-biting encoding lower decoding complexity early termination strategy

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Advanced flexible electrode materials and structural designs for sodium ion batteries

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Journal of Energy Chemistry 2022年第8期31卷 108-128,I0004页

作者： lina Zhao Zhehao Qu Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Reactor Engineering Technology Research Institute China Institute of Atomic EnergyBeijing 102413China

With the spectacular rise of wearable and portable electronics,flexible power supplying systems with robust mechanical flexibility and high energy storage performance under various mechanical deformation conditions are imperative to be *** ion batteries(SIBs)with sustainable natural abundance,low cost and superb properties similar to equivalent lithium ion batteries(LIBs),which have shown significant potentials as energy source for flexible electronic *** this review,the recent advances in flexible electrode materials based on different types of conductive substrates are addressed and the strategies underlying rational design for flexible structures are highlighted,as well as their applications in flexible *** remaining key challenges in rational electrodes design are discussed,and perspectives for practical applications of flexible SIBs are proposed as general guidance for future research of high-performance flexible SIBs.

关键词： Flexible electronics Wearable devices Energy storage Sodium ion batteries Flexible electrode

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Spatio-temporal dynamics of cyanobacterial abundance and toxicity in a Mediterranean hypereutrophic lake

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Journal of Oceanology and Limnology 2023年第5期41卷 1834-1848页

作者： Salah ARIF Nawel DJEBBARI Saber BELHAOUES Hassen touati Mourad BENSOUILAH Eco-biology Laboratory for Marine Environments and Coastal Areas Faculty of SciencesMarine Sciences DepartmentUniversity of Badji MokhtarAnnaba 23000Algeria

The Mediterranean basin is considered one of the most vulnerable areas in the world under the impacts of global warming and changes in precipitation ***,a shallow and polymictic freshwater lake located in northeastern Algeria(36°50′N,08°23′E),has recently experienced a significant proliferation of harmful cyanobacteria resulting in the generation of *** carried out this study in order to understand the succession patterns of dominant cyanobacteria and cyanotoxin production and the factors driving this in Oubeira Lake.A total of 26 cyanobacterial genera were identified,and among them Microcystis and Planktothrix accounted for more than 60%of the overall cell *** summer/fall period was dominated by Microcystis,Planktothrix,and in lesser extend by Cylindrospermum,*** the fall/winter transition,Dolichospermum,Pseudanabaena,and Aphanizomenon were the dominant ***,the bloom-forming cyanobacteria showed significant differences between months but not between *** microcystins(MC-LR)was detected in all collected samples(0.62-and 19.14-μg MC-LR equivalent/L),but appeared in high concentrations throughout the period of dominance of Microcystis and *** was more sensitive to nutrients than to *** was more dependent on temperature than on nutrients,which explains their coexistence during summer-fall ***,both genera are positively correlated with MC-LR and would probably be the main producers of ***,Dolichospermum,and Aphanizomenon co-occurred at the end of Planktothrix dominance period(December).Aphanizomenon and Pseudanabaena were correlated negatively with temperature and positively with water *** showed a strong positive correlation with *** Lake,could serve as a model of how cyanobacteria blooms may develop in lakes within Mediterranean climates.

关键词： Oubeira Lake cyanobacteria microcystin spatiotemporal variations shallow hypereutrophic lake

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Some New Trends of Deep Learning Research

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Chinese Journal of Electronics 2019年第6期28卷 1087-1091页

作者： MENG Deyu SUN lina School of Mathematics and Statistics Xi'an Jiaotong University Faculty of Information Technology Macau University of Science and Technology

Deep learning has been attracting increasing attention in the recent decade throughout science and engineering due to its wide range of successful *** real problems, however, most implementation stages for applying deep learning still require inevitable manual interventions, which naturally conducts difficulty in its availability to general users with less expertise and also deviates from the intelligence of humans. It is thus a challenging while critical issue to enhance the level of automation across all elements of the entire deep learning framework, like input amelioration, model designing and learning, and output adjustment. This paper tries to list several representative issues of this research topic, and briefly describe their recent research progress and some related works proposed along this research line. Some specific challenging problems have also been presented.

关键词： Deep learning Sample selection Data augmentation Small sample learning Generalization Interpretability Learning to learn

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TOPICS AND TRENDS OF THE ON-LINE PUBLIC CONCERNS BASED ON TIANYA FORUM

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Journal of Systems Science and Systems Engineering 2014年第2期23卷 212-230页

作者： lina Cao Xijin Tang Academy of Mathematics and Systems Science Chinese Academy of Sciences

Many social events spread fast through the Internet and arouse wide community discussions. Those on-line public opinions emerge into diverse topics along the time. Moreover, the strength of the topics is fluctuating. How to catch both primary topics and trend of topics over the shifting on-line discussions are not only of theoretical importance for scientific research, but also of practical importance for societal management especially in current China. To try the cutting-edge text analytic technologies to deal with unstructured on-line public opinions and provide support for social problem-solving in the big data era is worth an endeavour. This paper applies dynamic topic model （DTM） to explore the changing topics of new posts collected from Tianya Zatan Board of Tianya Club, the most influential Chinese BBS in China's Mainland. By analysis of the hot and cold terms trends, we catch the topics shift of main on-line concerns with illustrations of topics of school bus and environment in December of 2011. An algorithm is proposed to compute the strength fluctuation of each topic. With visualized analysis of the respective main topics in several months of 2012, some patterns of the topics fluctuation on the board are summarized.

关键词： Topic models dynamic topic model on-line topics evolution Tianya Club societal management

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Efficient enhancing scheme for TCP performance over satellite-based internet

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Journal of Systems Engineering and Electronics 2007年第1期18卷 177-182页

作者： Wang lina Gu Xuemai Information Engineering School Beijing Univ. of Science and Technology Beijing 100083 E R. China Communication Research Center Harbin Inst. of Technology Harbin 150001 P. R. China

Satellite link characteristics drastically degrade transport control protocol （TCP） performance. An efficient performance enhancing scheme is proposed. The improvement of TCP performance over satellite-based Interuet is accomplished by protocol transition gateways at each end of a satellite link. The protocol which runs over a satellite link executes the receiver-driven flow control and acknowledgements- and timeouts-based error control strategies. The validity of this TCP performance enhancing scheme is verified by a series of simulation experiments. Results show that the proposed scheme can efficiently enhance the TCP performance over satellite-based Internet and ensure that the available bandwidth resources of the satellite link are fully utilized.

关键词： Geostationary satellites Protocol transition gateway Transport control protocol

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AN ASYMPTOTIC BEHAVIOR AND A POSTERIORI ERROR ESTIMATES FOR THE GENERALIZED SCHWARTZ METHOD OF ADVECTION-DIFFUSION EQUATION

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Acta Mathematica Scientia 2018年第4期38卷 1227-1244页

作者： Salah BOULAARAS Mohammed Said touati BRAHIM Smail BOUZENADA Abderrahmane ZARAI Department of Mathematics College of Sciences and Arts Al-Ras Qassim University Kingdom of Saudi Arabia Laboratory of Fundamental and Applied Mathematics of Oran (LMFAO) University of Oran 1 Ahmed Benbella Oran Algeria Department of Mathematics and Computer Science Larbi Tebessi University 12002 Tebessa Algeria

In this paper, a posteriori error estimates for the generalized Schwartz method with Dirichlet boundary conditions on the interfaces for advection-diffusion equation with second order boundary value problems are proved by using the Euler time scheme combined with Galerkin spatial method. Furthermore, an asymptotic behavior in Sobolev norm is de- duced using Benssoussau-Lions＇ algorithm. Finally, the results of some numerical experiments are presented to support the theory.

关键词： a posteriori error estimates GODDM advection-diffusion Galerkin method Benssoussan-Lions' algorithm

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Generalization of integral inequalities and (c_1,c_1) stability of neutral differential equations with time-varying delays

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Journal of Systems Engineering and Electronics 2017年第2期28卷 347-360页

作者： Shuli Guo lina Han Key Laboratory of Complex System Intelligent Control and Decision School of Automation Beijing Institute of Technology Mathematics Institute Oxford University Department of Cardiovascular Internal Medicine Nanlou Branch of Chinese PLA General Hospital

A uniform stability analysis is developed for a type of neutral delays differential equations which depend on more general nonlinear integral inequalities. Many original investigations and results are obtained. Firstly, generations of two integral nonlinear inequalities are presented, which are very effective in dealing with the complicated integro-differential inequalities whose variable exponents are greater than zero. Compared with existed integral inequalities, those proposed here can be applied to more complicated differential equations, such as time-varying delay neutral differential equations. Secondly, the notions of (ω, Ω) uniform stable and (ω, Ω) uniform asymptotically stable, especially (c1, c1) uniform stable and (c1, c1) uniform asymptotically stable, are presented. Sufficient conditions on about (c1, c1) uniform stable and (c1, c1) uniform asymptotically stable of time-varying delay neutral differential equations are established by the proposed integral inequalities. Finally, a complex numerical example is presented to illustrate the main results effectively. The above work allows to provide further applications on the proposed stability analysis and control system design for different nonlinear systems. © 2017 Beijing Institute of Aerospace Information.

关键词： Control system stability Differential equations Nonlinear equations Time delay Time varying control systems

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Determinants of quinolone resistance in Escherichia coli causing community-acquired urinary tract infection in Bejaia,Algeria

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Asian Pacific Journal of Tropical Medicine 2014年第6期7卷 462-467页

作者： Yanat Betitra Vinuesa Teresa Vinas Miguel touati Abdelaziz Laboratoire d'ecologie Microbiologie.Universite A/Mira de Bejaia Laboratory of Molecular Microbiology and Antibiotics Dept.Pathology and Experimental therapeutics.Medical SchoolUniversity of Barcelona

Objective:To investigate the mechanisms of quinolone resistance and the association with other resistance markers among Esherichia coli(***) strains isolated from outpatient with urinary tract infection in north of ***:A total of 30 nalidixic acid-resistant *** isolates from outpatient with urinary tract infections from January 2010 to April 2011 in north of Algeria(Bejaia) were *** susceptibility was determined by disc diffusion assay,minimal inhibitory concentrations(MIC) of quinolone were determined by *** in the Quinolone Resistance-Determining Region(QRDR) of gyra and parC genes and screening for qnr(A,B and S) and bla genes were done by PCK and UNA ***:Most of the *** isolates(56.66%) were shown to carry mutations in gyrA and parC,igyra:Ser83Leu + Asp87Asn and parC:***.16.66 had only an alteration in gyrA:*** isolate produced qnrB-like and two *** isolates were CTXM-15 producers associated with TEM-1 producing in one ***-expression of bla_(LTV,M)_(15) and qnrB was determined in one *** ***:Our findings suggested the community emergence of gyrA and parC alterations and Qnr determinants that contributed to the development and spread of fluoroquinolone resistance in Algerian *** isolates.

关键词： Escherichia coli Community-acquired urinary tract infection QRDR Qnr ESBL

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