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Grid-Connected/Islanded switching Control strategy for Photovoltaic storage Hybrid Inverters Based on Modified Chimpanzee Optimization Algorithm

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Energy Engineering 2025年第1期122卷 265-284页

作者： Chao Zhou NarisuWang Fuyin ni Wenchao Zhang school of Electrical and Information Engineering Jiangsu University of TechnologyChangzhou213001China Jiangsu Key Laboratory of Power Transmission&Distribution Equipment Technology Jiangsu University of TechnologyChangzhou213001China

Uneven power distribution,transient voltage,and frequency deviations are observed in the photovoltaic storage hybrid inverter during the switching between grid-connected and island *** response to these issues,this paper proposes a grid-connected/island switching control strategy for photovoltaic storage hybrid inverters based on the modified chimpanzee optimization *** proposed strategy incorporates coupling compensation and power differentiation elements based on the traditional droop ***,it combines the angular frequency and voltage amplitude adjustments provided by the phase-locked loop-free pre-synchronization control *** pre-synchronization is achieved by regulating the virtual current to zero and aligning the photovoltaic storage hybrid inverter with the grid ***,two novel operators,learning and emotional behaviors are introduced to enhance the optimization precision of the chimpanzee *** operators ensure high-precision and high-reliability optimization of the droop control parameters for photovoltaic storage hybrid inverters.A simulink model was constructed for simulation analysis,which validated the optimized control strategy’s ability to evenly distribute power under load *** strategy effectively mitigated transient voltage and current surges during mode ***,seamless and efficient switching between gridconnected and island modes was achieved for the photovoltaic storage hybrid *** enhanced energy utilization efficiency,in turn,offers robust technical support for grid stability.

关键词： Photovoltaic storage hybrid inverters modified chimpanzee optimization algorithm droop control seamless switching

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Based on non-targeted metabolomics for differential components screening of Rosae Chinensis Flos and Rosae Rugosae Flos and their quality evaluation

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Traditional Medicine Research 2025年第2期10卷 1-15页

作者： Xu Liang ni-Hui Zhang Zhi-Lai Zhan Guang-Lu Chang Yan Gao Xia Li Wen-Yuan Gao school of Pharmaceutical science and Technology Faculty of MedicineTianjin UniversityTianjin 300193China state Key Laboratory for Quality Ensurance and sustainable Use of Dao-di Herbs China Academy of Chinese Medical SciencesBeijing 100700China Key Laboratory of Modern Chinese Medicine Resources Research Enterprises Tianjin 300402China

Background:Rosa chinensis *** Rosa rugosa *** not only of ornamental value,but also edible flowers and the flower buds have been listed in the Chinese Pharmacopoeia as traditional *** two plants have some differences in efficacy,but the flower buds are easily confused for similar *** addition,large-scale cultivation of ornamental rose flowers may lead to a decrease in the effective components of medicinal ***,it is necessary to study the chemical composition and make quality evaluation of Rosae Chinensis Flos(Yueji)and Rosae Rugosae Flos(Meigui).Methods:In this study,40 batches of samples including Meigui and Yueji from different regions in China were collected to establish high-performance liquid chromatography ***,the fingerprints data was analyzed using principal component analysis,hierarchical cluster analysis,and partial least squares discriminant analysis analysis chemometrics to obtain information on intergroup differences,and non-targeted metabolomic techniques were applied to identify and compare chemical compositions of samples which were chosen from groups with large *** compounds were screened by orthogonal partial least-squares discriminant analysis and s-plot,and finally multi-component quantification was performed to comprehensively evaluate the quality of Yueji and ***:The similarity between the fingerprints of 40 batches roses and the reference print R was 0.73 to 0.93,indicating that there were similarities and differences between the *** principal component analysis and hierarchical cluster analysis of fingerprints data,the samples from different origins and varieties were intuitively divided into four *** least-squares discriminant analysis analysis showed that Meigui and Yueji cluster into two categories and the model was reliable.A total of 89 compounds were identified by high resolution mass spectrometry,mainly were flavonoids and flavon

关键词： Rosa chinensis Jacq. Rosa rugosa Thunb. metabolomics chemometrics multiple component quantification quality evaluation

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A combined IR and XRD study of natural well crystalline goethites(α-FeOOH)

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Acta Geochimica 2022年第5期41卷 794-810页

作者： stephan Kaufhold Kristian ufer Melanie Hein niko Gotze Reiner Dohrmann Bundesanstalt fur Geowissenschaften und Rohstoffe BGRStilleweg 230655 HannoverGermany Landesamt fur Bergbau Energie und GeologieLBEGStilleweg 230655 HannoverGermany

Goethite(a-FeOOH)is one of the most abundant minerals on the Earth surface,occurring in temperate,tropical and equatorial *** in goethite can be substituted by many cations such as Al,ni for instance.A large amount of research has been conducted on the effect of varying elemental compositions(mainly Al-content)on the spectral features of goethites with most of the studies based on materials synthesized with different elemental *** different elemental ratios,however,may not only affect the composition of the products but also their crystallinity and/or particle size and *** parameters are known to affect results of both X-ray diffraction(XRD)and infrared spectroscopy(IR).These methods are predominantely used to characterize *** the present study,therefore,a significant set of natural goethites was considered in order to investigate the effect of elemental composition on XRD and IR *** focus was on crystallised samples which had a limited chemical variability but artefacts caused by the presence of admixtures could be excluded in most *** of all Rietveld refinement was optimized based on varying different parameters.A fairly good correlation of Rietveld derived crystallite sizes and specific surface area determined by N-adsorption(ssA)was found which proves the importance of considering the crystallite size parameters for Rietveld refinement and at the same times proves the quality of *** IR spectroscopy yet published relations of band position and Al-content could be confirmed despite the fact that the range of Al-contents was ***,the band position of the Fe–O stretching,previously used as proxy for crystallinity assessment,was found to be least variable hence contradicting yet published *** results were also published for the effect of the Al-content on the position of the asymmetric FeOH stretching band at 450 *** goethites investigated in the present study indicate that the crystall

关键词： Crystallinity Goethite IR-spectrometry X-ray diffraction XRD rietveld refinement Characterization

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基于AHP的传统村落“活态”评价研究——以中国贵州省铜仁市传统村落为例

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城市建筑 2025年第1期22卷 13-18,65页

作者：倪默璘刘泽倪琪九州大学人间环境学府北京工业大学城市建设学部大连民族大学建筑学院

可以预见未来中国农村的发展趋势是传统农业农村被现代农业农村取代,演绎传统村落的生态舞台发生了变化。面向未来,传统村落在多大程度上还保持着“活态”,或者说传统村落的“活态”由哪些要素构成是本文的关注点。文章以贵州省铜仁市... 详细信息

可以预见未来中国农村的发展趋势是传统农业农村被现代农业农村取代,演绎传统村落的生态舞台发生了变化。面向未来,传统村落在多大程度上还保持着“活态”,或者说传统村落的“活态”由哪些要素构成是本文的关注点。文章以贵州省铜仁市的传统村落为案例,通过实地调查、文献检索等方法收集第一手数据信息构建评价体系,运用AHP对案例村落进行“活态”评价,寻求和把握使传统村落处于“活态”的要素,为传统村落面向未来发展如何保持活力提供参考依据。

关键词：传统村落 “活态”化层次分析法(AHP) 铜仁地区

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Recent progress in MnBi2nTe3n+1 intrinsic magnetic topological insulators: crystal growth, magnetism and chemical disorder

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National science Review 2024年第2期11卷 65-80页

作者： Chaowei Hu Tiema Qian ni ni Department of Physics and Astronomy and California Nano systems Institute University of California-Los Angeles

The search for magnetic topological materials has been at the forefront of condensed matter research for their potential to host exotic states such as axion insulators, magnetic Weyl semimetals, Chern insulators,etc. To date, the MnBi2nTe3n+1family is the only group of materials showcasing van der Waals-layered structures, intrinsic magnetism and non-trivial band topology without trivial bands at the Fermi level. The interplay between magnetism and band topology in this family has led to the proposal of various topological phenomena, including the quantum anomalous Hall effect, quantum spin Hall effect and quantum magnetoelectric effect. Among these, the quantum anomalous Hall effect has been experimentally observed at record-high temperatures, highlighting the unprecedented potential of this family of materials in fundamental science and technological innovation. In this paper, we provide a comprehensive review of the research progress in this intrinsic magnetic topological insulator family, with a focus on single-crystal growth, characterization of chemical disorder, manipulation of magnetism through chemical substitution and external pressure, and important questions that remain to be conclusively answered.

关键词： MnBi2Te4 magnetic topological insulator magnetism tuning antiferromagnetism ferromagnetism pressure chemical doping

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Ordered proposition fusion based on consistency and uncertainty measurements

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science China(Information sciences) 2017年第8期60卷 117-135页

作者： Dayou LIU Yungang ZHU ni ni Jie LIU College of Computer science and Technology Jilin University Key Laboratory of symbolic Computation and Knowledge Engineering of Ministry of Education Jilin University Beijing Entry-Exit Inspection and Quarantine Bureau

The fusion of ordered propositions is an important and widespread problem in artificial intelligence,but existing fusion methods have difficulty handling the fusion of ordered propositions. In this paper, we propose a solution based on consistency and uncertainty measurements. The main contributions of this paper are as follows. First, we propose the concept of convexity degree, mean, and center of basic support function to comprehensively describe the basic support function of ordered propositions. second, we introduce entropy as a measure of uncertainty in the basic support function of ordered propositions. Third, we generalize the indeterminacy of the basic support function and propose a novel method to measure the consistency between two basic support functions. Finally, based on the above researches, we propose a novel algorithm for fusing ordered propositions. Theoretical analysis and experimental results demonstrate that the proposed method outperforms state-of-the-art methods.

关键词： uncertainty processing ordered proposition evidence theory dempster rule of combination information fusion

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Hepatitis C:a successful story of cure

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science Bulletin 2016年第24期61卷 1884-1887页

作者： Yi ni Department of Infectious Diseases Molecular VirologyUniversity Hospital Heidelberg 69120 Heidelberg Germany

On september 23, the 2016 Lasker-DeBakey clinical medical research award ceremony was celebrated in New York City. This annual prize has been awarded by the Lasker Foundation for over 71 years, and it is the most prestigious biomedical award in the United states, popu- larly known as ＂America＇s Nobel Prize＂. Indeed, 87 Lasker laureates have received the Nobel Prize, including 41 within the last 30 years （one example is the Chinese pharmaceutical chemist Youyou Tu, who won the 2011 Lasker-DeBakey award and four years later received the Nobel Prize）. This year, the honor went to Ralf F. W. Bartenschlager （Heidelberg University, Germany）, Charles M. Rice （Rockefeller University, NY, UsA）, and Michael J. sofia （Arbutus Biopharma, PA, UsA） for the development of cell culture system to study the replication of Hepatitis C virus （HCV） and for the use of this system to develop drugs capable of eliminating Hepatitis C.

关键词：丙型肝炎病毒 Michael 故事治愈诺贝尔奖生物制药开发能力培养系统

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A Characterization of T_(2g+1,2) among Alternating Knots

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Acta Mathematica sinica,English series 2021年第12期37卷 1841-1846页

作者： Yi ni Department of Mathematics CaltechMC 253-371200 E California BlvdPasadenaCA 91125USA

Let K be a genus g alternating knot with Alexander polynomial Δ_(K)(T)=Σ_(i=-g)^(g)a_(i)T^(i).We show that if |a_(g)|=|a_(g-1)|,then K is the torus knot T_(2g+1,±2).This is a special case of the Fox Trapezoidal ***... 详细信息

关键词： Alternating knots Alexander polynomial strongly quasipositive fibered knots

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signature of helium rain and dilute cores in Jupiter’s interior from empirical equations of state

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Earth and Planetary Physics 2020年第2期4卷 111-119页

作者： DongDong ni state Key Laboratory of Lunar and Planetary sciences Macao University of Science and Technology Institute for Planets and Exoplanets University of California

Measurements of Jupiter’s gravity field by Juno have been acquired with unprecedented precision, but uncertainties in the planet’s hydrogen–helium equation of state(EOs) and the hydrogen–helium phase separation have meant that differences remain in the interior model predictions. We deduce an empirical EOs from Juno gravity field observations in terms of the hydrostatic equation and then investigate the structure and composition of Jupiter by comparison of the empirical EOs with Jupiter’s adiabats obtained from the physical EOs. The deduced helium mass fraction suggests depletion of helium in the outermost atmosphere and helium concentration in the inner molecular hydrogen region, which is a signature of helium rain in Jupiter’s interior. The deduced envelope metallicity(the heavy-element mass fraction) is as high in the innermost envelope as 11–13 times the solar value. such a high metallicity provides sharp support to the dilute core model with the heavy elements dissolved in hydrogen and expanded outward. No matter how the core mass is varied, the empirical EOs derived from the two-layer interior model generally suggests higher densities in the innermost envelope than does the best-fit Jupiter’s adiabat;this result is, again, a signature of dilute cores in Jupiter’s interior. Moreover, no matter the core mass,the empirical EOs is found to exhibit an inflexion point in the deep interior, around 10 Mbar, which can be explained as the combined effect of helium concentration in the upper part and dilute cores in the lower part.

关键词： Jupiter,interior abundances,interiors geophysics

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Experimental isothermal section phase diagram of Ho-Fe-In at 773 K and magnetic properties of Ho_(12)Fe_(2.08)In_(2.92) alloy

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Rare Metals 2021年第4期40卷 987-994页

作者： Xiang Chen Chao ni The College of Physics and Electronic Information Engineering Neijiang Normal UniversityNeijiang 641002China The Ames Laboratory U.S.Department of EnergyIowa State UniversityAmesIA 50011-3020USA

The isothermal section of the Ho-Fe-In system at 773 K has been constructed by X-ray powder *** known structure ternary compound Er_(12)Fe_(2) In_(3)-type Ho_(12)Fe_(2) In_(3) has been *** the same time,solid solutions are not detected in Ho-Fe-In system at 773 *** magnetic transition and magnetocaloric effect of Ho_(12)Fe_(2.08)In_(2.92) alloy with Er_(12)Fe_(2) In_(3)-type structure were investigated by magnetic susceptibility and isothermal magnetization *** normal antiferromagnetic-paramagnetic transition and another abnormal one are discovered at 18 and 76 K in ground state,*** to a first-order field-induced metamagnetic transition(antiferromagnetic-ferromagnetic) at/below the Neel temperature of 18 K),the negative entropy changes are observed at corresponding *** is only a second-order ferromagnetic-paramagnetic transition near Curie temperature(TC),the maximum entropy change(Δ_(smax)) values are-6.14 J·kg^(-1)·K^(-1) at 3 K and 7.88 J·kg^(-1)·K^(-1) at 28 K in a field range of 0-7 *** reversible relative cooling power corresponding to negative entropy change can reach about 600 J·kg^(-1) in an wide operating temperature region Δ_(Tcycl)=74 K from 16 to90 K,which suggests that Ho_(12)Fe_(2.08)In_(2.92) could be a potential material for magnetic refrigeration in the corresponding temperature range.

关键词： Re_(3(x+y))(T2)_(x)X_(y)phase Metamagnetic transition Magnetothermal properties Ho-Fe-In alloy

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