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| 1 | Forecasting Scenario Generation for Multiple Wind Farms Considering Time-series Characteristics and Spatial-temporal Correlation显示文摘Scenario forecasting methods have been widely studied in recent years to cope with the wind power uncertainty problem. The main difficulty of this problem is to accurately and comprehensively reflect the time-series characteristics and spatial-temporal correlation of wind power generation. In this paper, the marginal distribution model and the dependence structure are combined to describe these complex characteristics. On this basis, a scenario generation method for multiple wind farms is proposed. For the marginal distribution model, the autoregressive integrated moving average-generalized autoregressive conditional heteroskedasticity-t (ARIMA-GARCH-t) model is proposed to capture the time-series characteristics of wind power generation. For the dependence structure, a time-varying regular vine mixed Copula (TRVMC) model is established to capture the spatial-temporal correlation of multiple wind farms. Based on the data from 8 wind farms in Northwest China, sufficient scenarios are generated. The effectiveness of the scenarios is evaluated in 3 aspects. The results show that the generated scenarios have similar fluctuation characteristics, autocorrelation, and crosscorrelation with the actual wind power sequences. | Qingyu Tu Shihong Miao Fuxing Yao Yaowang Li Haoran Yin Ji Han Di Zhang Weichen Yang | 2021 | Journal of Modern Power Systems and Clean Energy2021，9，4： | 3 |
| 2 | Corrosion behavior of Q235B carbon steel in simulated seawater pumped storage system under operational conditions显示文摘Seawater pumped storage systems have bright prospect for energy storage in the coming years.The operational conditions of seawater pumped storage system are complex and harsh,where metal materials suff er from severe general and local corrosion.The corrosion behavior of Q235B carbon steel in simulated seawater pumped storage system under operational conditions was studied by potentiodynamic polarization,cyclic potentiodynamic polarization,and scanning electron microscope(SEM).The results confi rm that the working pressure aff ected the corrosion resistance of Q235B carbon steel during the whole immersion period.The pressure promoted the electrochemical reaction of corrosion process and the corrosion rate increased with pressure at the initial immersion period.However,the stable rust layer formed after longtime immersion at diff erent pressures increased the corrosion resistance of carbon steel,and decreased the corrosion degree of carbon steel.Meanwhile,the working pressure aff ected the pitting corrosion behavior of Q235B carbon steel during the whole immersion period.The pitting corrosion potential was more negative and the tendency of pitting corrosion was higher at 4 MPa during the whole immersion period.However,pressure also accelerated the formation rate of protective rust layer on the steel surface.Q235B carbon steel has higher susceptibility to pitting corrosion at 4 MPa in the static seawater. | YANG Dan HUANG Yanliang LI Jianqiu GAO Yanming ZHAO Xia XU Weichen | 2020 | Journal of Oceanology and Limnology2020，38，5： | 2 |
| 3 | The Solar Upper Transition Region Imager(SUTRI)Onboard the SATech-01 Satellite显示文摘The Solar Upper Transition Region Imager(SUTRI)onboard the Space Advanced Technology demonstration satellite(SATech-01),which was launched to a Sun-synchronous orbit at a height of~500 km in 2022 July,aims to test the on-orbit performance of our newly developed Sc/Si multi-layer reflecting mirror and the 2k×2k EUV CMOS imaging camera and to take full-disk solar images at the Ne VII 46.5 nm spectral line with a filter width of~3 nm.SUTRI employs a Ritchey-Chrétien optical system with an aperture of 18 cm.The on-orbit observations show that SUTRI images have a field of view of~416×416 and a moderate spatial resolution of~8″without an image stabilization system.The normal cadence of SUTRI images is 30 s and the solar observation time is about16 hr each day because the earth eclipse time accounts for about 1/3 of SATech-01's orbit period.Approximately15 GB data is acquired each day and made available online after processing.SUTRI images are valuable as the Ne VII 46.5 nm line is formed at a temperature regime of~0.5 MK in the solar atmosphere,which has rarely been sampled by existing solar imagers.SUTRI observations will establish connections between structures in the lower solar atmosphere and corona,and advance our understanding of various types of solar activity such as flares,filament eruptions,coronal jets and coronal mass ejections. | Xianyong Bai Hui Tian Yuanyong Deng Zhanshan Wang Jianfeng Yang Xiaofeng Zhang Yonghe Zhang Runze Qi Nange Wang Yang Gao Jun Yu Chunling He Zhengxiang Shen Lun Shen Song Guo Zhenyong Hou Kaifan Ji Xingzi Bi Wei Duan Xiao Yang Jiaben Lin Ziyao Hu Qian Song Zihao Yang Yajie Chen Weidong Qiao Wei Ge Fu Li Lei Jin Jiawei He Xiaobo Chen Xiaocheng Zhu Junwang He Qi Shi Liu Liu Jinsong Li Dongxiao Xu Rui Liu Taijie Li Zhenggong Feng Yamin Wang Chengcheng Fan Shuo Liu Sifan Guo Zheng Sun Yuchuan Wu Haiyu Li Qi Yang Yuyang Ye Weichen Gu Jiali Wu Zhe Zhang Yue Yu Zeyi Ye Pengfeng Sheng Yifan Wang Wenbin Li Qiushi Huang Zhong Zhang | 2023 | Research in Astronomy and Astrophysics2023，23，6： | 1 |
| 4 | An assessment of genetic relationships in cultivated tea clones and native wild tea in Taiwan using RAPD and ISSR markers 显示文摘 | Lai Jouann Yang Weichen Xiao Juying | 2001 | Botanical Bulletin of Academia Sinica2001，42，： | 1 |
| 5 | Rhesus monkeys exhibiting spontaneous ritualistic behaviors resembling obsessive-compulsive disorder显示文摘Obsessive-compulsive disorder(OCD)is a chronic and debilitating psychiatric disorder that affects∼2%–3%of the population globally.Studying spontaneous OCD-like behaviors in non-human primates may improve our understanding of the disorder.In large rhesus monkey colonies,we found 10 monkeys spontaneously exhibiting persistent sequential motor behaviors(SMBs)in individual-specific sequences that were repetitive,time-consuming and stable over prolonged periods.Genetic analysis revealed severely damaging mutations in genes associated with OCD risk in humans.Brain imaging showed that monkeys with SMBs had larger gray matter(GM)volumes in the left caudate nucleus and lower fractional anisotropy of the corpus callosum.The GM volume of the left caudate nucleus correlated positively with the daily duration of SMBs.Notably,exposure to a stressor(human presence)significantly increased SMBs.In addition,fluoxetine,a serotonergic medication commonly used for OCD,decreased SMBs in these monkeys.These findings provide a novel foundation for developing better understanding and treatment of OCD. | Rongwei Zhai Geya Tong Zheqin Li Weichen Song Yang Hu Sha Xu Qiqi Wei Xiaocheng Zhang Yi Li Bingbing Liao Chenyu Yuan Yinqing Fan Ge Song Yinyin Ouyang Wenxuan Zhang Yaqiu Tang Minghui Jin Yuxian Zhang He Li Zhi Yang Guan Ning Lin Dan JStein Zhi-Qi Xiong Zhen Wang | 2023 | National Science Review2023，10，11： | 1 |
| 6 | Model Predictive Direct Power Control of Grid-connected Converters Considering Unbalanced Filter Inductance and Grid Conditions显示文摘The grid-connected converter(GCC) is widely used as the interface between various distributed generations and the utility grid. To achieve precise power control for GCC, this paper presents a model predictive direct power control(MPDPC)with consideration of the unbalanced filter inductance and grid conditions. First, the characteristics of GCC with unbalanced filter inductance are analyzed and a modified voltage control function is derived. On this basis, to compensate for the power oscillation caused by unbalanced filter inductance, a novel power compensation method is proposed for MPDPC to eliminate the DC-side current ripple while maintaining sinusoidal grid current. Besides, to improve the control robustness against mismatched filter inductance, a filter inductance identification scheme is proposed. Through this scheme, the estimated value of filter inductance is updated in each control period and applied in the proposed MPDPC. Finally, simulation results in PSCAD/EMTDC confirm the validity of the proposed MPDPC and the filter inductance identification scheme. | Weichen Yang Shihong Miao Zhiwei Liu Ji Han Yulong Xiong Qingyu Tu | 2021 | Journal of Modern Power Systems and Clean Energy2021，9，6： | 1 |
| 7 | Tests on Half-Scale, Two-Story, Two-Bay, Moment-Resisting Hybrid Concrete Frames显示文摘 | Xue Weichen Yang Xinlei | 2009 | ACI Structural Journal2009，，5： | 1 |
| 8 | Beauty of Yixing Purple Sand Clay Teapots显示文摘Yixing clay is a type of clay from the region near the city of Yixing in Jiangsu Province,China.Its use dates back to the Song Dynasty (960-1279) | Kong Liangfa and Fan Weichen Yang Jing | 2009 | China & The World Cultural Exchange2009，75，11： | 0 |
| 9 | BUILDERS OF A VIBRANT CITY显示文摘The Capital Museum is hosting an exhibition to display the most outstanding photographs selected from the 12th'Love Bejing,Focus on Beijing'public photography cultural activity.The theme of this year's event is'Beijing:A Happy and Prosperous City:Two hundred photographs were selected and are on display at the museum.The photographs not only highlight Beijing's latest developments,but also show residents'love for their homeland,their pursuit of dreams,their contributions to society and their expectationsforabrighterfuture. | Zhang Hongpeng Dong Weichen He Rong Li Guodong Pan Zhiwang Wang Jianzhong Yang Jun Zhang Yunfang | 2021 | Beijing2021，，24： | 0 |
| 10 | Design,Fabrication and Assembly of the Solar Upper Transition Region Imager(SUTRI)显示文摘The Solar Upper Transition Region Imager(SUTRI)focuses on the solar transition region to achieve dynamic imaging observation of the upper transition region.In this paper,we report the optical system design,mechanical design,ultrasmooth mirror manufacture and measurement,EUV multilayer film coating,prelaunch installation and calibration for the SUTRI payload at IPOE,Tongji University.Finally,the SUTRI carried by the SATech-01 satellite was successfully set to launch.All functions of this telescope were normal,and the observation results obtained in orbit were consistent with the design. | Zhanshan Wang Jun Yu Runze Qi Chunling He Zhengxiang Shen Li Jiang Weichen Gu Jiali Wu Zhe Zhang Pengfeng Sheng Yifan Wang Yue Yu Zeyi Ye JingJing Xia Yujie Xing Hongfei Jiao Bin Ma Qiushi Huang Zhong Zhang Xianyong Bai Yuanyong Deng Hui Tian Nange Wang Lun Shen Song Guo Lei Jing Xiaobo Chen Yang Gao Xiaocheng Zhu Xiaofeng Zhang Junwang He Qi Shi Shuo Liu Xingzi Bi | 2023 | Research in Astronomy and Astrophysics2023，23，9： | 0 |
| 11 | Magnetocontrollable droplet mobility on liquid crystal-infused porous surfaces显示文摘Magnetocontrollable droplet mobility on surfaces of both solids and simple fluids have been widely used in a wide range of applications.However,little is understood about the effect of the magnetic field on the wettability and mobility of droplets on structured fluids.Here,we report the manipulation of the dynamic behaviors of water droplets on a film of thermotropic liquid crystals(LCs).We find that the static wetting behavior and static friction of water droplets on a 4’-octyl-4-biphenylcarbonitrile(8CB)film strongly depend on the LC mesophases,and that a magnetic field caused no measurable change to these properties.However,we find that the droplet dynamics can be affected by a magnetic field as it slides on a nematic 8CB film,but not on isotropic 8CB,and is dependent on both the direction and strength of the magnetic field.By measuring the dynamic friction of a droplet sliding on a nematic 8CB film,we find that a magnetic field alters the internal orientational ordering of the 8CB which in turn affects its viscosity.We support this interpretation with a scaling argument using the LC magnetic coherence length that includes(i)the elastic energy from the long-range orientational ordering of 8CB and(ii)the free energy from the interaction between 8CB and a magnetic field.Overall,these results advance our understanding of droplet mobility on LC films and enable new designs for responsive surfaces that can manipulate the mobility of water droplets. | Yang Xu Yuxing Yao Weichen Deng Jen-Chun Fang Robert LDupont Meng Zhang SimonČopar UrošTkalec Xiaoguang Wang | 2023 | Nano Research2023，16，4： | 0 |
| 12 | Cryogenian and Ediacaran integrative stratigraphy,biotas,and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas显示文摘The complex evolutionary history of the Qinghai-Tibetan Plateau and its surrounding areas,including the continental blocks(Indian,Lhasa,South Qiangtang,Tarim,Olongbuluk,Central Qilian,Alxa,North China,Yangtze,Central Iran and Oman)and the orogenic belts between them,has long been the frontier in Earth science research.The Cryogenian and Ediacaran strata are extensively distributed in these blocks.Specifically,relatively complete Cryogenian and Ediacaran successions have been discovered in Oman,Indian,Yangtze,and Tarim blocks,while only the Ediacaran successions have been reported in Iran,the South Qiangtang,Central Qilian,Alxa,and North China blocks.Based on previous studies together with the integration of new materials and advancement obtained through the Second Tibetan Plateau Scientific Expedition and Research,this review aims to synthesize a correlative stratigraphic framework of the representative Cryogenian and Ediacaran sequences from the Qinghai-Tibetan Plateau and its surrounding areas.Furthermore,the Cryogenian and Ediacaran biotas and major geological events in these areas are comprehensively discussed in aspects of current research status.The results indicate that,in general,Ediacaran fossils of each area exhibit distinct features in preservation and assemblage composition,but the typical late Ediacaran fossils Cloudina and Shaanxilithes have been reported from most of these areas.In addition to the two global Cryogenian glaciations,late Ediacaran glaciogenic deposits are extensively recorded in the areas within and around the northern QinghaiTibetan Plateau(including the North China,Alxa,Central Qilian,Olongbuluk,and Tarim blocks,and the North Qilian Accretionary Belt),as well as central and southern Iran.However,further research is required to determine the age,distribution,and origin of these late Ediacaran glaciogenic deposits.Meanwhile,the middle Ediacaran DOUNCE/Shuram Excursion is widely documented in the Qinghai-Tibetan Plateau and its surrounding areas.The available data show that,after the break-up of the Rodinia supercontinent,most of the continental blocks in the areas were located along the northern margin of East Gondwana and a few(such as North China)were located between the Gondwana and Laurentia.In general,the paleogeographic evolution of most of these blocks during the Cryogenian and Ediacaran remains disputatious,necessitating further research to resolve the controversies surrounding their paleogeographic reconstruction models during this critical time interval. | Lang SUN Malik Muhammad Saud Sajid KHAN Chuan YANG Zhixin SUN Bing PAN Shehryar AHMED Lanyun MIAO Weichen SUN Chunlin HU Xiaojuan SUN Cui LUO Bo CHEN Zongjun YIN Fangchen ZHAO Guoxiang LI Maoyan ZHU | 2024 | Science China Earth Sciences2024，67，4： | 0 |
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