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Multi-objective energy management for PHEV using Pontryagin's minimum principle and particle swarm optimization online

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Science China(Information Sciences) 2021年第1期64卷 263-265页

作者： yuying wang Xiaohong JIAO Institute of Electric Engineering Yanshan University

Dear editor,Plug-in hybrid electric vehicles (PHEVs),which can be charged through an external power grid,have been regarded as one of the research areas for the developing methods to reduce petroleum demand and exhaust *** management strategies (EMSs) are crucial for reducing the energy consumption for PHEVs because the power demands during the driving cycle are usually provided by multiple energy *** addition,PHEVs are often equipped with high-cost batteries,which need to be charged and discharged *** indicates that,to achieve the economic feasibility of PHEVs,battery health cannot be ignored with respect to energy management [1].

关键词： plug-in hybrid electric vehicle energy management strategy multi-objective Pontryagin's minimum principle particle swarm optimization

Speed Regulation Method Using Genetic Algorithm for Dual Three-phase Permanent Magnet Synchronous Motors

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CES Transactions on Electrical Machines and Systems 2023年第2期7卷 171-178页

作者： Xiuhong Jiang yuying wang Jiarui Dong the Department of School of Electronic Information Engineering Shenyang Aerospace UniversityShenyang110136China

Dual three-phase Permanent Magnet Synchronous Motor(DTP-PMSM)is a nonlinear,strongly coupled,high-order multivariable *** today’s application scenarios,it is difficult for traditional PI controllers to meet the requirements of fast response,high accuracy and good *** order to improve the performance of DTP-PMSM speed regulation system,a control strategy of PI controller based on genetic algorithm is ***,the basic mathematical model of DTP-PMSM is established,and the PI parameters of DTP-PMSM speed regulation system are optimized by genetic algorithm,and the modeling and simulation experiments of DTP-PMSM control system are carried out by MATLAB/*** simulation results show that,compared with the traditional PI control,the proposed algorithm significantly improves the performance of the control system,and the speed output overshoot of the GA-PI speed control system is *** anti-interference ability is stronger,and the torque and double three-phase current output fluctuations are smaller.

关键词： Dual three-phase permanent magnet synchronous motor Genetic algorithm PI control Speed regulation

State-of-the-art development about cryogenic technologies to support space-based infrared detection

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Chinese Journal of Aeronautics 2023年第12期36卷 32-52页

作者： yuying wang Jindong LI Xiang LI Hezhi SUN Institute of Spacecraft System Engineering China Academy of Space TechnologyBeijing 100094China Institute of Remote Sensing Satellite China Academy of Space TechnologyBeijing 100094China

As a key technology for space-based Earth observation and astronomical exploration,cooled mid-wavelength and long-wavelength Infrared(IR)detection is widely used in national defense,astronomy exploration,medical imaging,environmental monitoring,agricultural and other *** performances of IR detectors,including cut-off wavelength,detectivity,sensitivity and temperature resolution,plays a significant role in efficiently observing and tracking the low-temperature far-distance moving *** optimal detection performance requires the IR detectors to operate at cryogenic *** future development of space-based applications relies heavily on the mid-wavelength and long-wavelength IR detection technologies,which should be enabled by the long-life cryogenic refrigeration and high-efficiency energy transportation system operating below 40 K,to support the Earth observation and astronomical ***,the efficiency degradation caused by the super low temperature brings tremendous challenges to the life time of cryogenic refrigeration and energy transportation *** paper evaluates the influence of cryogenic temperature on the infrared detector performances,reviews the features,development and space applications of cryogenic cooling technologies,as well as the cryogenic energy transportation ***,it analyzes the future development trends and challenges in supporting the space-based IR detection.

关键词： Infrared detection Space application Mid-and long-wavelength IR detection Cryogenic cooler Energy transportation

Incorporating Linguistic Rules in Statistical Chinese Language Model for Pinyin-to-character Conversion

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High Technology Letters 2001年第2期7卷 8-13页

作者：刘秉权 wang Xiaolong wang yuying Department of Computer Science and Engineering Harbin Institute of Technology

An N-gram Chinese language model incorporating linguistic rules is presented. By constructing elements lattice, rules information is incorporated in statistical frame. To facilitate the hybrid modeling, novel methods such as MI-based rule evaluating, weighted rule quantification and element-based n-gram probability approximation are presented. Dynamic Viterbi algorithm is adopted to search the best path in lattice. To strengthen the model, transformation-based error-driven rules learning is adopted. Applying proposed model to Chinese Pinyin-to-character conversion, high performance has been achieved in accuracy, flexibility and robustness simultaneously. Tests show correct rate achieves 94.81% instead of 90.53% using bi-gram Markov model alone. Many long-distance dependency and recursion in language can be processed effectively.

关键词： Chinese Pinyin-to-character conversion Rule-based language model N-gram language model Hybrid language model Element lattice Transformation-based error-driven learning

An equivalent ground thermal test method for single-phase fluid loop space radiator

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Chinese Journal of Aeronautics 2015年第1期28卷 86-92页

作者： Ning Xianwen wang yuying Zhang Jiaxun Liu Dongxiao Beijing Key Laboratory of Space Thermal Control Technology Beijing Institute of Spacecraft System Engineering (ISSE)

Thermal vacuum test is widely used for the ground validation of spacecraft thermal control system. However, the conduction and convection can be simulated in normal ground pressure environment completely. By the employment of pumped fluid loops＇ thermal control technology on spacecraft, conduction and convection become the main heat transfer behavior between radiator and inside cabin. As long as the heat transfer behavior between radiator and outer space can be equivalently simulated in normal pressure, the thermal vacuum test can be substituted by the normal ground pressure thermal test. In this paper, an equivalent normal pressure thermal test method for the spacecraft single-phase fluid loop radiator is proposed. The heat radiation between radiator and outer space has been equivalently simulated by combination of a group of refrigerators and thermal electrical cooler（TEC） array. By adjusting the heat rejection of each device, the relationship between heat flux and surface temperature of the radiator can be maintained. To verify this method,a validating system has been built up and the experiments have been carried out. The results indicate that the proposed equivalent ground thermal test method can simulate the heat rejection performance of radiator correctly and the temperature error between in-orbit theory value and experiment result of the radiator is less than 0.5 C, except for the equipment startup period. This provides a potential method for the thermal test of space systems especially for extra-large spacecraft which employs single-phase fluid loop radiator as thermal control approach.

关键词： spacecraft rejection orbit conduction branch pumped employment convection outer correctly

A biomimetic experimental study of magnesium ion mineralization in Mg-enriched aragonite

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Science China Earth Sciences 2019年第10期62卷 1619-1629页

作者： Qizhi YAO yuying wang Yifan ZHANG Han LI Gentao ZHOU School of Chemistry and Materials Science University of Science and Technology of ChinaHefei230026China CAS Key Laboratory of Crust-Mantle Materials and Environments School of Earth and Space SciencesUniversity of Science andTechnology of ChinaHefei230026China CAS Center for Excellence in Comparative Planetology Hefei230026China

In this work, we test the hypothesis that the Mg2+content in biogenic aragonite has a systematic relationship with biomolecules. A series of biomimetic experiments were conducted to show the dependence of Mg2+in aragonite on the model organic molecules added to the mineralizing solution, including the concentration of various organics, mineralization temperature, Mg/Ca ratio and Mg2+initial concentration. The mineralized products were characterized by powder X-ray diffraction(XRD), Fourier transform infrared spectroscopy(FT-IR), field emission scanning electron microscopy(FESEM), thermogravimetric analysis(TGA), and inductively coupled plasma-atomic emission spectrometry(ICP-AES). High Mg2+is detected in aragonite obtained in the presence of organics, whereas the lowest Mg2+is measured in aragonite without organics. Moreover, the concentration of Mg2+in aragonite increases gradually with the amended organics. Mg K-edge NEXAFS spectra show that the magnesium microenvironment in aragonite is similar to the organic-associated environment, indicating that the Mg2+ions are not on the aragonite lattices, but adhere to the intracrystalline organics. Furthermore, the mineralization temperature, Mg/Ca ratio and Mg2+content in mineralization medium significantly influence Mg2+content in aragonite, reiterating the effect of the microenvironment on aragonite biomineralization.

关键词： Aragonite Magnesium content Organics Calcium carbonate Biomineralization

Engineering Multipedal DNA Walker on Paper for Sensitive Electrochemical Detection of Plant MicroRNA

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Chinese Journal of Chemistry 2022年第23期40卷 2808-2814页

作者： Xiaojuan Liu Junzhu Xiang Hao Cheng yuying wang Feng Li College of Chemistry and Pharmaceutical Sciences Qingdao Agricultural UniversityQingdaoShandong 266109China College of Plant Health&Medicine Qingdao Agricultural UniversityQingdaoShandong 266109China

MicroRNAs (miRNAs) are vital regulators in both plants and animals. Therefore, it is highly desirable to develop portable and user-friendly biosensors for convenient and sensitive detection of miRNAs. Herein, a novel paper-based electrochemical biosensor was intelligently engineered for the detection of plant miRNA based on a smart DNA walking machine and λ-exonuclease (λ-Exo)-assisted target recycling amplification. Using TaMIR5086 as a target plant miRNA, the presence of TaMIR5086 could initiate the target recycling process and activate the DNA walker to move along the track on the paper. Then, numerous electroactive molecules-labeled single-strand DNA (ssDNA) would be released and adsorbed onto the surface of screen-printed electrode, generating a remarkably increased electrochemical signal. Benefitting from the dual amplification, the developed biosensor exhibits excellent analytical performance toward TaMIR5086 with a detection limit down to 0.37 pmol/L. Furthermore, the paper-based biosensor could be applied for the analysis of target miRNA in complex biological samples, which found great potential in the fields of miRNA analysis and plant biology research.

关键词： RNA recognition Electrochemistry Sensor DNA walker on paper Target recycling amplification

Crystal structures and microwave dielectric properties of Sr_(2)MgWO_(6) ceramics at different sintering temperatures

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Journal of Materiomics 2022年第1期8卷 79-87页

作者： Jiqing Lv Zhikai Cao yuying wang Feng Shi Jing wang School of Material Science&Engineering Shandong University of Science and TechnologyQingdao266590China School of Materials Science and Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan250353China

Sr_(2)MgWO_(6)(SMW)is a typical perovskite oxide compound,but there has been little research on the effects of processing on its dielectric *** this work,SMW ceramics were prepared by solid-state synthesis with sintering at 1450℃,1475℃,1500℃and 1525℃,*** results confirmed that the samples possessed double perovskite structure(Fm-3m).The Raman and FTIR spectra were used to study the lattice vibrational *** FPSQ model was used to obtain the fitting curves of the FTIR spectra and derive the intrinsic properties of the material that were found to be in agreement with the measured *** structure-property relationships were successfully established based on the Raman mode *** optimal sintering temperature of SMW ceramics was identified as 1475℃due to the excellent performances characteristics(ε_(r)=16.97,Q×f=23,872 GHz,τ_(f)=-35.38 ppm/℃)obtained at this *** study explored the relationships among the crystal structures,lattice vibrational characteristics and dielectric properties of SMW ceramics,so as to further understand their dielectric response mechanism and lay a solid theoretical foundation for the development of microwave ceramics.

关键词： Microwave dielectric ceramics Crystal structures Intrinsic properties Lattice vibrational characteristics Structure-property relationships

N_2O Emission from Paddy Field under Different Rice Planting Modes

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Wuhan University Journal of Natural Sciences 2006年第4期11卷 989-996页

作者： wang yuying ZHU Bo wang Yanqiang GAO Meirong MA Xiumei Institute of Mountain Hazards and Environment ChineseAcademy of Sciences Chengdu 610041 Sichuan China Graduate University of Chinese Academy of Sciences Beijing 100049 China College of Resources and Environment Southwest Agricultural University Chongqing 400716 China

Measurements of N2O emissions from conventional rice cultivation （CRC）, CRC with straw mulching, system of rice intensification （SRI） and SRI with plastic film mulching were conducted through static chamber/gas-chromatography techniques. The results show that daily fluctuation of N2O emissions in jointing stage are much higher than in others. A type peak of N2O seasonal emission presented between jointing and bearing stages companying with high daily average temperature and low precipitation. Biomass and leaf stomatal conductance were observed. Total quantities of N2O emission were budgeted. The results showed that after jointing stage the average N2O emission flux of SRI with plastic film mulching increased significantly than CRC with straw mulching and SRI, the leaf stomatal conductance of those showed the same trend （p〈 0.05）. Yield and total quantity of N20 emission in CRC with straw mulching enhanced 13. 7% and 10.7% compared with those of CRC, respectively. The total quantity of N20 emissions reduced 3. 6% in SRI with plastic film mulching compared with CRC, however, the yield increase of that was not significant.

关键词： nitrous oxide emission rice olanting mode oaddv field