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Trackingδ13C andδ18O fluctuations uncovers stable modes and key patterns of paleoclimate

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Geoscience Frontiers 2024年第4期15卷 115-133页

作者： Shifeng Sun haiying Wang Yongjian Huang School of Science China University of Geosciences(Beijing)Beijing 100083China State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences(Beijing)Beijing 100083China School of Earth Sciences and Resources China University of Geosciences(Beijing)Beijing 100083China

The examination of fluctuations in the correlations betweenδ13C andδ18O is of significant importance for the reconstruction of the Earth's climate history.A key challenge in paleoclimatology is finding a suitable method to represent the correlated fluctuation system betweenδ13C andδ*** method must be able to handle data sets with missing or inaccurate values,while still retaining the full range of dynamic information about the *** non-linear and complex correlations betweenδ13C andδ18O poses a chal-lenge in developing reliable and interpretable *** transition network,which involves embedding theδ13C andδ18O sequence into the network using phase space reconstruction,is a coarse-grained based *** approach is well-suited to nonlinear,complex dynamic systems,and is particularly adept at emerging knowledge from low-quality *** have effectively represented the fluctuations in the correlation betweenδ13C andδ18O since 66 million years ago(Ma)using a system of complex *** system,which has topological dynamical structures,is able to uncover the stable modes and key patterns in Cenozoic climate *** findings could help to improve climate models and predictions of future climate change.

关键词： Cenozoic climate dynamics Correlation analysis Complex network Coarse-grained methods Phase space reconstruction

Effect of CO_(2)flooding in an oil reservoir with strong bottom-water drive in the Tahe Oilfield,Tarim Basin,Northwest China

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Energy Geoscience 2024年第1期5卷 230-233页

作者： Li Zhang haiying Liao Maolei Cui R&D Center of Sustainable Development of Continental Sandstone Mature Oilfield Beijing100083China Petroleum Exploration and Production Research Institute SinopecBeijing100083China

The dissolution and diffusion of CO_(2)in oil and water and its displacement mechanism were investigated by laboratory experiment and numerical simulation for Block 9 in the Tahe oilfield,a sandstone oil reservoir with strong bottom-water drive in Tarim Basin,Northwest *** parameters were analyzed as solubility ratio of CO_(2)in oil,gas and water,interfacial tension,in-situ oil viscosity distribution,remaining oil saturation distribution,and oil *** results show that CO_(2)flooding could control water coning and increase oil *** the early stage of the injection process,CO_(2)expanded vertically due to gravity differentiation,and extended laterally under the action of strong bottom water in the intermediate and late *** CO_(2)got enriched and extended at the oil-water interface,forming a high interfacial tension zone,which inhibited the coning of bottom water to some extent.A miscible region with low interfacial tension formed at the gas injection front,which reduced the in-situ oil viscosity by about 50%.The numerical simulation results show that enhanced oil recovery(EOR)is estimated at 5.72%and the oil exchange ratio of CO_(2)is 0.17 t/t.

关键词： Strong bottom-water drive reservoir CO_(2)flooding Enhanced oil recovery Coning of bottom water Tahe oilfield Tarim Basin Northwest China

Peak Shaving Strategy of Concentrating Solar Power Generation Based on Multi-Time-Scale and Considering Demand Response

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Energy Engineering 2024年第3期121卷 661-679页

作者： Lei Fang haiying Dong Xiaofei Zhen Shuaibing Li School of New Energy and Power Engineering Lanzhou Jiaotong UniversityLanzhou730070China

According to the multi-time-scale characteristics of power generation and demand-side response(DR)resources,as well as the improvement of prediction accuracy along with the approaching operating point,a rolling peak shaving optimization model consisting of three different time scales has been *** proposed peak shaving optimization model considers not only the generation resources of two different response speeds but also the two different DR resources and determines each unit combination,generation power,and demand response strategy on different time scales so as to participate in the peaking of the power system by taking full advantage of the fast response characteristics of the concentrating solar power(CSP).At the same time,in order to improve the accuracy of the scheduling results,the combination of the day-ahead peak shaving phase with scenario-based stochastic programming can further reduce the influence of wind power prediction errors on scheduling *** testing results have shown that by optimizing the allocation of scheduling resources in each phase,it can effectively reduce the number of starts and stops of thermal power units and improve the economic efficiency of system *** spinning reserve capacity is reduced,and the effectiveness of the peak shaving strategy is verified.

关键词： Peak shaving strategy concentrating solar power multi-time-scale demand-side response rolling optimization

Aging Mechanism and Life Estimation of Photovoltaic Inverter DC-link Capacitors in Alternating Humid and Thermal Environment

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Chinese Journal of Electrical Engineering 2024年第1期10卷 48-62页

作者： Quanyi Gao Shuaibing Li Yi Cui Yongqiang Kang haiying Dong School of New Energy and Power Engineering Lanzhou Jiaotong UniversityLanzhou 730070China State Key Laboratory of Large Electric Drive System and Equipment Technology Tianshui 741000China School of Engineering University of Southern QueenslandSpringfield 4300Australia

DC-link capacitors play a vital role in managing ripple voltage and current in converters and various *** study focuses on exploring the aging characteristics of DC-link capacitors in alternating humid and thermal environments aligned with the operational conditions in photovoltaic and wind power *** to relevant power equipment standards,we designed a 24-h alternating humid and thermal aging environment tailored to the requirements of DC-link *** aging test platform is established,and 20 widely used metallized polypropylene film capacitors are selected for *** such as the capacitance,equivalent series resistance(ESR),and phase angle are assessed during aging,as well as the onset time and extent of aging at various *** study focuses on the aging mechanisms,analyzing electrode corrosion,the self-healing process,and dielectric *** the aging characteristics enabled us to calculate the lifespan of the capacitor and predict it under different degrees of capacitance *** results show that under alternating humid and thermal conditions,capacitance attenuation and ESR increase exhibit exponential nonlinearity,influenced by factors such as the oxidation and self-healing of capacitive metal electrodes,dielectric main-chain fracture,and crystal *** study underscores the pivotal role of encapsulation in determining the aging decay time.

关键词： DC-link capacitors aging mechanism life prediction metallized film capacitors

The influence of wing morphology upon intraspecific divergence in birds: A global study of subspecies richness

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Avian Research 2024年第2期15卷 196-201页

作者： haiying Fan Weibin Guo Buge Lin Zhiqing Hu Changcao Wang Shaobin Li School of Life Sciences Jinggangshan UniversityJi’An343009China State Key Laboratory of Biocatalysis and Enzyme Engineering School of Life SciencesHubei UniversityWuhan430062China College of Life Science Yangtze UniversityJingzhou434023China

Since the time of Darwin,subspecies have been recognized as an initial stage in the evolution of ***,the impact of dispersal on subspecies richness in birds globally has received little attention,despite dispersal being a key factor in determining the rate of evolution and playing a significant role in evolutionary ***,it is important to conduct a comprehensive study to address this *** this study,we aimed to assess the association between subspecies richness(measured by the number of subspecies)and dispersal ability(measured by the hand-wing index)on a global scale,using a dataset of over 7000 bird *** results revealed a negative correlation between dispersal ability and the number of subspecies,without any quadratic *** wing is a crucial phenotypic trait for birds,and the concept of subspecies is important in speciation theory and conservation ***,our findings not only enhance our understanding of the association between avian morphological traits and evolutionary divergence but also have implications for the conservation of avian species diversity.

关键词： Dispersal Gene flow Hand-wing index Subspecies richness

MYB2 and MYB108 regulate lateral root development by interacting with LBD29 in Arabidopsis thaliana

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Journal of Integrative Plant Biology 2024年第8期66卷 1675-1687页

作者： Feng Zhang Junxia Wang Tingting Ding Xuefeng Lin haiying Hu Zhaojun Ding Huiyu Tian The Key Laboratory of Plant Development and Environmental Adaptation Biology Ministry of EducationSchool of Life SciencesShandong UniversityQingdao 266237China Advanced Medical Research Institute Cheeloo College of MedicineShandong UniversityJinan 250012China

AUXIN RESPONSE FACTOR 7(ARF7)-mediated auxin signaling plays a key role in lateral root(LR)development by regulating downstream LATERAL ORGAN BOUNDARIES DOMAIN(LBD)transcription factor genes,including LBD16,LBD18,and *** proteins are believed to regulate the transcription of downstream genes as homodimers or ***,whether LBD29 forms dimers with other proteins to regulate LR development remains ***,we determined that the Arabidopsis thaliana(L.)*** transcription factors MYB2 and MYB108 interact with LBD29 and regulate auxin-induced LR *** MYB2 and MYB108 were induced by auxin in an ARF7-dependent *** of MYB2 by fusion with an SRDX domain severely affected auxin-induced LR formation and the ability of LBD29 to induce LR *** contrast,overexpression of MYB2 or MYB108 resulted in greater LR numbers,except in the lbd29 mutant *** findings underscore the interdependence and importance of MYB2,MYB108,and LBD29 in regulating LR *** addition,MYB2–LBD29 and MYB108–LBD29 complexes promoted the expression of CUTICLE DESTRUCTING FACTOR 1(CDEF1),a member of the GDSL(Gly-Asp-Ser-Leu)lipase/esterase family involved in LR *** summary,this study identified MYB2–LBD29 and MYB108–LBD29 regulatory modules that act downstream of ARF7 and intricately control auxin-mediated LR development.

关键词： ARF7 auxin lateral roots LBD29 MYB108 MYB2

Parallelogram 3d-4f-5d heterometallic clusters based on trilacunary tungstoantimonates with excellent proton conductivity

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Chinese Chemical Letters 2024年第3期35卷 528-531页

作者： haiying Wang Han Xu Chaolong Chen Yingjie Zhu Yikang Zhang Dongdi Zhang Jingyang Niu Henan Key Laboratory of Polyoxometalate Chemistry College of Chemistry and Molecular SciencesHenan UniversityKaifeng 475004China School of Pharmaceutical Science&Yunnan Key Laboratory of Pharmacology for Natural Products Kunming Medical UniversityKunming 650500China Collaborative Innovation Center of Chemistry for Energy Materials State Key Laboratory of Physical Chemistry of Solid Surface and Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Two 3d-4f-5d heterometallic cluster-containing polyoxometalates,formulated as Na_(22){(SbW_(9)O_(33))_(4)[La_(3)W_(6)MO_(18)(H_(2)O)_(8)(CH_(3)COO)_(4)]_(2)}·nH_(2)O(abbreviated as La_(6)M_(2),M=Co/Mn)were synthesized and structurally ***-crystal X-ray diffraction analyses reveal that the polyanions of La_(6)Co_(2)and La_(6)Mn_(2)consist of the uncommon 3d-4f-5d clusters{La_(6)W_(12)Co_(2)}and{La_(6)W_(12)Mn_(2)},which are encapsulated by four trilacunary Keggin tungstoantimonates to form the parallelogram-shaped title ***,the polyanions can be extended into a two-dimensional(2D)frame by the linkage of peripheral Na+*** inner space of the 2D layer was filled with water molecules and thus an H-bonded network was formed,which is expected to exhibit a fascinating proton *** study of water-assisted proton conduction demonstrated that La_(6)Co_(2)and La_(6)Mn_(2)were temperature-and humiditydependent proton conductors,respectively,and the proton conductivities could reach 1.3×10^(-2)and 2.3×10^(-2)S/cm at 65℃and 90%RH conditions.

关键词： Polyoxometalate Parallelogram Heterometallic 3d-4f-5d cluster Proton conductivity

A Cascading Fault Path Prediction Method for Integrated Energy Distribution Networks Based on the Improved OPA Model under Typhoon Disasters

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Energy Engineering 2024年第10期121卷 2825-2849页

作者： Yue He YaxiongYou ZhianHe haiying Lu Lei Chen Yuqi Jiang Hongkun Chen Guangzhou Power Supply Bureau Guangdong Power Grid Co.Ltd.CSGGuangzhou510000China School of Electrical Engineering and Automation Wuhan UniversityWuhan430072China

In recent times,the impact of typhoon disasters on integrated energy active distribution networks(IEADNs)has received increasing attention,particularly,in terms of effective cascading fault path prediction and enhanced fault recovery *** this study,we propose a modified ORNL-PSerc-Alaska(OPA)model based on optimal power flow(OPF)calculation to forecast IEADN cascading fault *** first established the topology and operational model of the IEADNs,and the typical fault scenario was chosen according to the component fault probability and information *** modified OPA model consisted of two layers:An upper-layer model to determine the cascading fault location and a lower-layer model to calculate the OPF by using Yalmip and CPLEX and provide the data to update the upper-layer *** approach was validated via the modified IEEE 33-node distribution system and two real *** results showed that the fault trend forecasted by the novel OPA model corresponded well with the development and movement of the typhoon above the *** proposed model also increased the load recovery rate by>24%compared to the traditional OPA model.

关键词： IEADNs OPA model cascading fault path prediction fault probability optimal power flow typical fault scenario

Machine learning optimization strategy of shaped charge liner structure based on jet penetration efficiency

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Defence Technology（防务技术） 2024年第9期39卷 23-41页

作者： Ziqi Zhao Tong Li Donglin Sheng Jian Chen Amin Yan Yan Chen haiying Wang Xiaowei Chen Lanhong Dai State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 100049 China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China

Shaped charge liner(SCL)has been extensively applied in oil recovery and defense *** superior penetration capability through optimizing SCL structures presents a substantial challenge due to intricate rate-dependent processes involving detonation-driven liner collapse,high-speed jet stretching,and *** study introduces an innovative optimization strategy for SCL structures that employs jet penetration efficiency as the primary objective *** strategy combines experimentally validated finite element method with machine learning(FEM-ML).We propose a novel jet penetration efficiency index derived from enhanced cutoff velocity and shape characteristics of the jet via machine *** index effectively evaluates the jet penetration ***,a multi-model fusion based on a machine learning optimization method,called XGBOOST-MFO,is put forward to optimize SCL structure over a large input *** strategy's feasibility is demonstrated through the optimization of copper SCL implemented via the FEM-ML ***,this strategy is extended to optimize the structure of the recently emerging CrMnFeCoNi high-entropy alloy conical liners and hemispherical copper ***,the strategy can provide helpful guidance for the engineering design of SCL.

关键词： Jet penetration efficiency Shaped charge liner FEM-ML XGBOOST MFO High-entropy alloy