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Building Simulation 2022年第3期15卷 317-331页

作者： Rui Tang Cheng fan fanzhe Zeng wei Feng Institute for Environmental Design and Engineering University College LondonLondonUK Key Laboratory for Resilient Infrastructures of Coastal Cities(Shenzhen University) Ministry of EducationChina Sino-Australia Joint Research Center in BIM and Smart Construction Shenzhen UniversityShenzhenChina School of Municipal and Environmental Engineering Shenyang Jianzhu UniversityShenyangChina China Energy Group Lawrence Berkeley National LaboratoryBerkeleyCAUSA

Demand response(DR)of commercial buildings by directly shutting down part of operating chillers could provide an immediate power reduction for power *** this special fast DR event,effective control needs to guarantee expected power reduction and ensure an acceptable indoor *** study,therefore,developed a data-driven model predictive control(MPC)using support vector regression(SVR)for fast DR *** to the characteristics of fast DR events,the optimized hyperparameters of SVR and shortened searching range of genetic algorithm are used to improve the control ***,a comprehensive comparison with RC-based MPC is conducted based on three scenarios of power demand *** results show that the proposed SVR-based MPC could fulfill the control objectives of power demand and indoor temperature *** with RC-based MPC,the SVR-based MPC could alleviate the time/labor cost of model development without sacrificing the control performance of fast DR events.

关键词： demand response support vector regression machine learning building peak demand model predictive control smart grid

An Agent-based Simulation Model of Wheat Market Operation:The Benefit of Support Price

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Journal of Systems Science and Systems Engineering 2022年第4期31卷 437-456页

作者： Jingsi Huang fan Zhang Jie Song wei Li Department of Economy and Management North China Electric Power UniversityBaoding071000China Department of Industrial Engineering and Management Peking UniversityBeijing100871China

Grain security is one of the most important issues *** developing countries,including China,have adopted the Agriculture Support Price(ASP)program to stimulate farmers’enthusiasm for growing grain,to ensure self-sufficiency in grain and the stable development of the grain *** propose decision support for the government in designing a more reasonable support price in the ASP program,we formulate an agent-based model to simulate the operation of the wheat market in the harvest *** formulate the formation process of the market price influenced by farmers’expected sale price,processors’expected purchase price,and the ASP,the time series and regression methods are *** on the proposed market price model,to quantitatively analyze the grain transaction process and the ASP program’s impacts on market agents,we develop an agent-based simulation model to describe the adaptive evolution and interaction among market ***,we validate and implement the simulation model with public wheat market ***,insights and suggestions about the decision of the ASP program are provided.

关键词： Agent-based simulation(ABS) wheat market agriculture support price decision support public policy

Early stopping for the iterative decoding for Q-LDPC

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The Journal of China Universities of Posts and Telecommunications 2008年第1期15卷 28-31页

作者： ZHOU wei MEN Ai-dong QUAN zi-yi School of Telecommunication Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

Q-ary low-density parity-check （Q-LDPC） codes have a better performance than those of the binary low-density parity-check （B-LDPC） codes, at short and medium block lengths, but the decoder of Q-LDPC has more complexity. In this article, a new stop criterion is proposed. By analyzing the changes of the maximum posteriori probability of the variable node, the criterion decides whether the iteration of the decoder must be stopped. The simulation results show that the stop criterion can effectively reduce the computation complexity of the Q-LDPC decoder with negligible performance loss.

关键词： Q-ary LDPC stop criterion iterative decoding

Multi-objective clustering analysis via combinatorial pigeon inspired optimization

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Science China(Technological Sciences) 2020年第7期63卷 1302-1313页

作者： CHEN Lin DUAN HaiBin fan YanMing wei Chen Bio-inspired Autonomous Flight Systems Research Group School of Automation Science and Electrical EngineeringBeihang UniversityBeijing 100083China Peng Cheng Laboratory Shenzhen 518000China Shenyang Aircraft Design and Research Institute Aviation Industry Corporation of China(AV1C)Shenyang 110035China

Multi-objective data clustering is an important issue in data mining, and the realization of data clustering using the multiobjective optimization technique is a significant topic. A combinatorial multi-objective pigeon inspired optimization(CMOPIO)with ring topology is proposed to solve the clustering problem in this paper. In the CMOPIO, a delta-locus based coding approach is employed to encode the pigeons. Thus, the length of pigeon representation and the dimension of the search space are significantly reduced. Thereby, the computational load can be effectively depressed. In this way, the pigeon inspired optimization(PIO) algorithm can be discretized with an auxiliary vector to address data clustering. Moreover, an index-based ring topology with the ability of contributing to maintain flock diversity is adopted to improve the CMOPIO performance. Comparative simulation results demonstrate the feasibility and effectiveness of our proposed CMOPIO for solving data clustering problems.

关键词： multi-objective data clustering combinatorial multi-objective pigeon inspired optimization delta-locus based coding pigeon representation

Prior-guided GAN-based interactive airplane engine damage image augmentation method

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Chinese Journal of Aeronautics 2022年第10期35卷 222-232页

作者： Rui HUANG Bokun DUAN Yuxiang ZHANG wei fan School of Computer Science and Technology Civil Aviation University of ChinaTianjin 300300China

Deep learning-based methods have achieved remarkable success in object detection,but this success requires the availability of a large number of training *** sufficient training images is difficult in detecting damages of airplane *** augmenting images by rotation,flipping,and random cropping cannot further improve the generalization ability of existing deep *** propose an interactive augmentation method for airplane engine damage images using a prior-guided GAN to augment training *** method can generate many types of damages on arbitrary image regions according to the strokes of *** proposed model consists of a prior network and a *** Prior network generates a shape prior vector,which is used to encode the information of user *** GAN takes the shape prior vector and random noise vectors to generate candidate *** damages are pasted on the given positions of background images with an improved Poisson *** compare the proposed method with traditional data augmentation methods by training airplane engine damage detectors with state-ofthe-art object detectors,namely,Mask R-CNN,SSD,and YOLO *** results show that training with images generated by our proposed data augmentation method achieves a better detection performance than that by traditional data augmentation methods.

关键词： Airplane engine Damage detection Data augmentation GAN Interactive

A novel phosphate ligand used for the Rh-catalyzed hydroformylation of cyclohexene in a thermoregulated PEG biphase system

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Chinese Chemical Letters 2007年第8期18卷 933-935页

作者： wei wei Yan Hua Wang Jing Yang Jiang zi Lin Jin State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian 116012 China

A novel phosphate ligand, tri-（methoxyl polyethylene glycol）-phosphate （TMPGPA）, has been synthesized and used in the Rhcatalyzed hydroformylation of cyclohexene in a thermoregulated PEG biphase system. Under the optimized conditions, pressure = 5 MPa （H2：CO = 1：1）, P/Rh = 10 （molar ratio）, reaction time = 4 h and temperature = 120 ℃, the conversion of cyclohexene and the yield of aldehyde are 99%. The catalyst retained in PEG phase can be easily separated from the organic phase containing product by simple phase separation and reused ten times without obvious loss in activity.

关键词： Thermoregulated PEG biphase system Hydroformylation Phosphate ligand Rhodium Cyclohexene

Simultaneous enhancement of red luminescence and thermal stability of a novel red phosphor:A Li^(+)-Eu^(3+)co-occupied site strategy in BaAl_(2)Ge_(2)O_(8)lattices

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Journal of Rare Earths 2024年第10期42卷 1846-1854页

作者： wei Zhang Changjian Wang Xusheng Qiao Xianping fan State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China Ocean Academy Zhejiang UniversityZhoushan316021China

The rapid development of phosphor-converted white light emitting diodes(pc-WLEDs)requires new red phosphors with efficient and thermally stable luminescence for high-quality warm-white ***,it is still a challenge to discover red phosphors with facile synthesis,high internal quantum efficiency(IQE),excellent thermal stability and high color ***,a novel red-emitting Eu^(3+)activated barium dialuminum digermanate(BaAl_(2)Ge_(3)O_(8),EAGO)phosphor showing strong red emission at 610 nm was *** IQE is improved from 32.91%to 78.84%by employing a charge compensation *** lithium-ion co-dop ed BAGO:Eu^(3+)phosphor exhibits a nearly twofold increase in integral photoluminescence(PL)intensity and the high color purity reaches 94.17%.Impressively,the PL intensity of the BAGO:Eu^(3+),Li^(+)phosphor drops by only 2.6%at 150℃of that at room ***,the pc-WLED using the red BAGO:Eu^(3+),Li^(+)phosphor exhibits white light with the chromaticity coordinate of(0.3515,0.3495),a high color-rendering index of 92 and a low correlated color temperature of 4746 *** these results manifest that BAGO:Eu^(3+),Li^(+)phosphor is a suitable red phosphor for nearultraviolet(NUV)chip-based pc-WLEDs.

关键词： BaAl_(2)Ge_(2)O_(8):Eu^(3+) Red phosphor Charge compensation High quantum efficiency Excellent thermal stability Rare earths

The Yield and Water Use Efficiency to First Cutting Date of Siberian Wildrye in North China

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Agricultural Sciences in China 2011年第11期10卷 1716-1722页

作者： LI zi-zhong ZHANG wei-hua GONG Yuan-shi Department of Soil and Water Sciences China Agricultural University Beijing 100193 P.R.China

A field experiment study was conducted in Bashang Plateau in North China in 2008 to determine the effect of three first cutting dates on the growth and water use efficiency （WUE） of Siberian wildrye （Elymus sibiricus L.） in the agropastoral ecotone of North China （APENC）. The experiment was conducted in a split plot design with three replications with water supply regime as the main plot treatment and first cutting date as the subplot treatment. Two water supply regimes were used, which included rain-fed treatment as control （CK） and a single irrigation and straw mulch treatment （W）. Three first cutting date treatments were conducted at early heading stage on July 1 （E）, at late heading stage on July 12 （L）, and at flowering stage on July 27 （F）, respectively. The results showed that the forage yield and WUE were the lowest at early heading stage harvest, while the highest at flowering stage either in CK or W treatment. Under combined CK and W treatments, average forage yields of the F subplots were 2 900 and 6 703 kg ha-~, and the values of WUE were 0.82 and 2.28 kg m-3, respectively. Under the CK treatment, forage yields of the E and L subplots were 43.8 and 41.9% lower than the F subplots, and their values of WUE were 46.2 and 50.3% lower than F, respectively. Under the W treatment, the forage yields of the E and L subplots were 74.9 and 61.6% lower, and their values of WUE were 78.1 and 63.3% lower, respectively, as compared with F subplots. Therefore, earlier first cutting did not increase the regrowth of Siberian wildrye and improve the mismatch between rainy season and the period of high growth potential of the grass in the semiarid APENC.

关键词： siberian wildrye first cutting date forage yield water use efficiency North China

Recombinant protein production in the filamentous fungus Trichoderma

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Chinese Journal of Chemical Engineering 2021年第2期34卷 74-81页

作者： Huiling wei Mengyue Wu Aili fan Haijia Su Beijing Key Laboratory of Bioprocess College of Life Science and TechnologyBeijing University of Chemical TechnologyNorth Third Ring Road 15Chaoyang DistrictBeijing 100029China

Trichoderma is an ascomycete fungal genus widely distributed in the *** species were selected,engineered and utilized for protein production for *** high extracellular secretion capability and eukaryotic post-translational modification machinery make Trichoderma *** interesting *** this review,we summarized the recombinant proteins produced in Trichoderma since 2014,concerning their origins,hosts,promoters,terminators,signal peptides,yields and commonly used ***,strategies and merging trends in protein production and strain engineering are classified and summarized regarding codon optimization,promoter utilization,transcription factor regulation,post-translational modification and proteolytic degradation *** state-of-art biotechnologies and more available expression platforms,Trichoderma *** be more successful hosts to produce recombinant proteins as desired,*** enzyme formula for efficient cellulose degradation or functional protein with high purity and yield.

关键词： Trichoderma Heterologous expression Protein Catalysis Biotechnology

Reading comprehension based on visualization of eye tracking and EEG data

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Science China(Information Sciences) 2020年第11期63卷 276-289页

作者： Shiwei CHENG Yilin HU Jing fan Qianjing wei School of Computer Science and Technology Zhejiang University of Technology

Using eye tracking technology can help us understand reading behavior. Furthermore, sharing the teacher’s eye tracking features resulted in improving the students’ comprehension of the same reading material [1]. On ... 详细信息

关键词： N/A null no key words eye tracking EEG