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Observability Analysis of Integrated Electricity and Heating Systems with Thermal quasi-dynamics in Pipelines

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CSEE Journal of Power and Energy Systems 2024年第3期10卷 1145-1158页

作者： Zhigang Li Wenjian Zheng Junbo zhao J.H.Zheng q.H.Wu School of Electric Power Engineering South China University of TechnologyGuangzhou 510641China Fuzhou Changle District Power Supply Company of State grid Fujian Electric Power Co. Ltd.Fuzhou 350000China Department of Electrical and Computer Engineering University of ConnecticutStorrsCT 06269USA CSEE IEEE

Observability analysis(OA)is vital to obtaining the available input measurements of state estimation(SE)in an integrated electricity and heating system(IEHS).Considering the thermal quasi-dynamics in pipelines,the measurement equations in heating systems are dependent on the estimated results,leading to an interdependency between OA and *** OA methods require measurement equations be known exactly before SE is performed,and they are not applicable to *** bridge this gap,a scenario-based OA scheme for IEHSs is devised that yields reliable analysis results for a predefined set of time-delay scenarios to cope with this *** its core procedure,the observable state identification and observability restoration are formulated in terms of integer linear *** tests are conducted to demonstrate the validity and superiority of the proposed formulation.

关键词： Integrated electricity and heating system measurement observability analysis state estimation thermal quasi-dynamics

Hole-doping and pressure effects on the Ⅱ-Ⅱ-Ⅴ based diluted magnetic semiconductor(Ba1-xKx)(Zn1-yMny)2As2

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Hole-doping and pressure effects on the Ⅱ-Ⅱ-Ⅴ based dilut...

Dynamic plugging regulating strategy of pipeline robot based on reinforcement learning

中国晶体学会第六届学术年会暨会员代表大会（极端条件晶体材料分会）

作者： F.Sun g.q.zhao C.A.Escanhoela Jr. B.J.Chen R.H.Kou Y.g.Wang Y.M.Xiao P.Chow H.K.Mao D.Haskel W.g.Yang C.q.Jin Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences Advanced Photon Source Argonne National Laboratory Center for High Pressure Science & Technology Advanced Research (HPSTAR) Collaborative Innovation Center of quantum Matter

We investigate doping-and pressure-induced changes in the electronic state of Mn 3d and As4p orbitals in Ⅱ-Ⅱ-V based diluted magnetic semiconductor(Ba,K)(Zn,Mn)Asto shed light into the mechanism of indirect exchange...

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Petroleum Science 2024年第1期21卷 597-608页

作者： Xing-Yuan Miao Hong zhao College of Mechanical and Transportation Engineering China University of PetroleumBeijing102249China

Pipeline isolation plugging robot (PIPR) is an important tool in pipeline maintenance operation. During the plugging process, the violent vibration will occur by the flow field, which can cause serious damage to the pipeline and PIPR. In this paper, we propose a dynamic regulating strategy to reduce the plugging-induced vibration by regulating the spoiler angle and plugging velocity. Firstly, the dynamic plugging simulation and experiment are performed to study the flow field changes during dynamic plugging. And the pressure difference is proposed to evaluate the degree of flow field vibration. Secondly, the mathematical models of pressure difference with plugging states and spoiler angles are established based on the extreme learning machine (ELM) optimized by improved sparrow search algorithm (ISSA). Finally, a modified q-learning algorithm based on simulated annealing is applied to determine the optimal strategy for the spoiler angle and plugging velocity in real time. The results show that the proposed method can reduce the plugging-induced vibration by 19.9% and 32.7% on average, compared with single-regulating methods. This study can effectively ensure the stability of the plugging process.

关键词： Pipeline isolation plugging robot Plugging-induced vibration Dynamic regulating strategy Extreme learning machine Improved sparrow search algorithm Modified q-learning algorithm

All-dielectric terahertz metasurface governed by bound states in the continuum with high-q factor

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The Journal of China Universities of Posts and Telecommunications 2024年第2期31卷 44-54页

作者： Li Kun zhao Xu Wang Meng Jia Xingning zhao Ruiqi Lu guizhen School of Integrated Circuit Science and Engineering Tianjin University of TechnologyTianjin 300384China School of Electronic and Electrical Engineering Ningxia UniversityYinchuan 750021China qILU Aerospace Information Research Institute Chinese Academy of Sciences(CAS)Jinan 250101China State Key Laboratory of Media Convergence and Communication Communication University of ChinaBeijing 100024China

The method of terahertz(THz)resonance with a high-quality(high-q)factor offers a vital physical mechanism for metasurface sensors and other high-q factor ***,it is challenging to excite the resonance with a high-q factor in metasurfaces with proper sensitivity as well as figure of merit(FOM)***,an all-dielectric metasurface composed of two asymmetrical rectangular blocks is *** and silicon are the materials applied for the substrate and cuboids *** distinct resonance governed by bound states in the continuum(BIC)is excited by forming an asymmetric cluster by a novel hybrid method of cutting and moving the *** investigation focuses on analyzing the transmission spectra of the metasurface under different variations in structural parameters and the loss of silicon refractive *** the proposed defective metasurface serves as a transmittance sensor,it shows a q factor of 1.08×10^(4)and achieves an FOM up to 4.8×10^(6),which is obtained under the asymmetric parameter equalling 1μ***,the proposed defective metasurface is sensitive to small changes in refractive *** the thickness of the analyte is 180μm,the sensitivity reaches a maximum value of 578 gHz/***,the proposed defective metasurface exhibits an extensive number of possible applications in the filters,biomedical diagnosis,security screening,and so on.

关键词： terahertz(THz)metasurface high-quality(high-q)factor bound states in the continuum figure of merit(FOM)

Effect of β-carotene on selected indices of in vitro rumen fermentation in goats

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Effect of β-carotene on selected indices of in vitro rumen ...

Preparation of entangledW states based on the cavity qED system

The Ⅶ International Symposium on the Nutrition of Herbivores(ISNH-7)

作者： H.-X.Yan L.-S.Sun g.-q.zhao~1 College of Animal Science and Technology,Yangzhou University Yangzhou 225009,P.R.China

Three goats fitted with rumen fistula were used as donors ofrumen *** were incubated in vitro with buffered tureen fluid for 24 *** levels of β-carotene(five groups:10,50,100,200, 500 mg/l)were added as five treatment groups to determine whether it affected rumen fermentation in vitro as compared with blank samples used as ***-N concentrations with 50,100 and 200 mg β-carotene/I group were found significantly lower than that in blank samples(Pgroups were higher than in blanks,while those found in 200 and 500 mg/I groups were significantly higher(P0.05),although propionate and butyrate concentrations *** is concluded that β-carotene can enhance the utilization of NH-N by rumen microorganisms and thus promote their growth in vitro.

关键词： β-carotene rumen fermentation goat in vitro

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Chinese Physics B 2024年第9期33卷 290-296页

作者： Ke Li Jun-Long zhao Department of Physics Shanghai Second Polytechnic UniversityShanghai 201209China quantum Information Research Center Shangrao Normal UniversityShangrao 334001China

We present a qubit-loss-free(qLF)fusion scheme for generating large-scale atom W states in cavity quantum electrodynamics(qED)*** to the most current fusion schemes which are conditioned on the case where one particle can be extracted from each initial W state to the fusion process,our scheme will access one or two particles from each W *** on the atom–cavity-field detuned interaction,three jWin+m+t states can be generated from the jWin,jWim,and jWit states with the help of two auxiliary atoms,and three jWin+m+t+q states can be generated from jWin,jWim,jWit,and a jWiq state with the help of three auxiliary *** the numerical simulations of the resource cost of fusing three small-size W states based on the previous schemes,our fusion scheme seems to be more *** qLF fusion scheme can be generalized to the case of fusing k different or identical particle W ***,with no qubit loss,it greatly reduces the number of fusion steps and prepares W states with larger particle numbers.

关键词： W state detuned interaction state fusion cavity quantum electrodynamics

Safety-Constrained Multi-Agent Reinforcement Learning for Power quality Control in Distributed Renewable Energy Networks

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Computers, Materials & Continua 2024年第4期79卷 449-471页

作者： Yongjiang zhao Haoyi Zhong Chang Cyoon Lim Department of Computer Engineering Chonnam National UniversityYeosu59626South Korea

This paper examines the difficulties of managing distributed power systems,notably due to the increasing use of renewable energy sources,and focuses on voltage control challenges exacerbated by their variable nature in modern power *** tackle the unique challenges of voltage control in distributed renewable energy networks,researchers are increasingly turning towards multi-agent reinforcement learning(MARL).However,MARL raises safety concerns due to the unpredictability in agent actions during their exploration *** unpredictability can lead to unsafe control *** mitigate these safety concerns in MARL-based voltage control,our study introduces a novel approach:Safety-ConstrainedMulti-Agent Reinforcement Learning(SC-MARL).This approach incorporates a specialized safety constraint module specifically designed for voltage control within the MARL *** module ensures that the MARL agents carry out voltage control actions *** experiments demonstrate that,in the 33-buses,141-buses,and 322-buses power systems,employing SC-MARL for voltage control resulted in a reduction of the Voltage Out of Control Rate(%***)from0.43,0.24,and 2.95 to 0,0.01,and 0.03,***,the Reactive Power Loss(q loss)decreased from 0.095,0.547,and 0.017 to 0.062,0.452,and 0.016 in the corresponding systems.

关键词： Power quality control multi-agent reinforcement learning safety-constrained MARL

Underlying anti-hypertensive mechanism of the Mizuhopecten yessoensis derived peptide NCW in spontaneously hypertensive rats via widely targeted kidney metabolomics

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Food Science and Human Wellness 2024年第1期13卷 472-481页

作者： Wenjun Xue Wenzhu zhao Sijia Wu Zhipeng Yu School of Food Science and Engineering Hainan UniversityHaikou 570228China College of Food Science and Engineering Bohai UniversityJinzhou 121013China Lab of Nutrition and Functional Food Jilin UniversityChangchun 130062China

The angiotensin-converting enzyme(ACE)inhibitory peptide NCW derived from Mizuhopecten yessoensis has been demonstrated to have significant in vivo anti-hypertensive effects,however,its anti-hypertensive mechanism is still not fully *** study established a UPLC-q-TRAP-MS/MS-based widely targeted kidney metabolomics approach to explore the changes of kidney metabolic profiles and to clarify the antihypertensive mechanism of peptide NCW in spontaneously hypertensive rats(SHRs).Multivariate statistical analysis indicated that the kidney metabolic profiles were clearly separated between the SHR-NCW and SHRUntreated groups.A total of 85 metabolites were differentially regulated,and 16 metabolites were identified as potential kidney biomarkers,e.g.,3-hydroxybutyrate,malonic acid,deoxycytidine,and L-aspartic *** peptide NCW might regulate kidney metabolic disorder of SHRs to alleviate hypertension by suppressing inflammation and improving nitric oxide production under the regulation of linoleic acid metabolism,folate related pathways,synthesis and degradation of ketone bodies,pyrimidine metabolism,β-alanine metabolism,and retinal metabolism.

关键词： ACE inhibitory peptide Kidney Mechanism Metabolomics Spontaneously hypertensive rats

The pathogenic mechanism of syndactyly type V identified in aHoxd13q50R knock-in mice

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Bone Research 2024年第2期12卷 349-360页

作者： Han Wang Xiumin Chen Xiaolu Meng Yixuan Cao Shirui Han Keqiang Liu Ximeng zhao Xiuli zhao Xue Zhang McKusick-Zhang Center for genetic Medicine State Key Laboratory of Complex Severe and Rare DiseasesDepartment of Medical GeneticsInstitute of Basic Medical Sciences Chinese Academy of Medical SciencesSchool of Basic Medicine Peking Union Medical CollegeBeijing 100005China Department of Orthopedics State Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100730China

Syndactyly type V (SDTY5) is an autosomal dominant extremity malformation characterized by fusion of the fourth and fifthmetacarpals. In the previous publication, we first identified a heterozygous missense mutation q50R in homeobox domain (HD) ofHOXD13 in a large Chinese family with SDTY5. In order to substantiate the pathogenicity of the variant and elucidate the underlyingpathogenic mechanism causing limb malformation, transcription-activator-like effector nucleases (TALEN) was employed togenerate a Hoxd13q50R mutant mouse. The mutant mice exhibited obvious limb malformations including slight brachydactyly andpartial syndactyly between digits 2-4 in the heterozygotes, and severe syndactyly, brachydactyly and polydactyly in *** on BMP2 and SHH/gREM1/AER-FgF epithelial mesenchymal (e-m) feedback, a crucial signal pathway for limbdevelopment, we found the ectopically expressed Shh, grem1 and Fgf8 and down-regulated Bmp2 in the embryonic limb bud atE10.5 to E12.5. A transcriptome sequencing analysis was conducted on limb buds (LBs) at E11.5, revealing 31 genes that exhibitednotable disparities in mRNA level between the Hoxd13q50R homozygotes and the wild-type. These genes are known to be involvedin various processes such as limb development, cell proliferation, migration, and apoptosis. Our findings indicate that the ectopicexpression of Shh and Fgf8, in conjunction with the down-regulation of Bmp2, results in a failure of patterning along both theanterior-posterior and proximal-distal axes, as well as a decrease in interdigital programmed cell death (PCD). This cascadeultimately leads to the development of syndactyly and brachydactyly in heterozygous mice, and severe limb malformations inhomozygous mice. These findings suggest that abnormal expression of SHH, FgF8, and BMP2 induced by HOXD13q50R may beresponsible for the manifestation of human SDTY5.

关键词： BMP2 mechanism finding