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| 1 | Preliminary Scientific Results of Chang'E-1 Lunar Orbiter:Based on Payloads Detection Data in the First Phase显示文摘Chang'E-1 lunar Orbiter was launched by Long March 3A rocket from Xichang Satel-lite Launch Center at 18:05BT(Beijing Time) Oct.24,2007.It is the first step of its ambitious three-stage moon program,a new milestone in the Chinese space exploration history.The primary science objectives of Chang'E-1 lunar orbiter are to obtain three-Dimension(3D) stereo images of the lunar surface,to analyze the distribution and abundance of elements on the surface,to investigate the thickness of lunar soil,evaluate helium-3 resources and other characteristics,and to detect the space environment around the moon.To achieve the above four mission objectives,eight sets of scientific instruments are chosen as the payloads of the lunar orbiter,including a CCD stereo camera(CCD),a Sagnac-based interferometer spectrometer(ⅡM),a Laser Altimeter(LAM),a Microwave Radiometer(MRM),a Gamma-Ray Spectrometer(GRS),an X-ray spectrometer(XRS),a High-Energy Particle Detector(HPD),and two Solar Wind Ion Detectors(SWID).The detected data of the payloads show that all payloads work well.This paper introduces the status of payloads in the first phase and preliminary scientific results. | OUYANG Ziyuan JIANG Jingshan LI Chunlai SUN Huixian ZOU Yongliao LIU Jianzhong LIU Jianjun ZHAO Baochang REN Xin YANG Jianfeng ZHANG Wenxi WANG Jianyu MOU Lingli CHANG Jin ZHANG Liyan WANG Huanyu LI Yongquan ZHANG Xiaohui ZHENG Yongchun WANG Shijin BIAN Wei | 2008 | 空间科学学报2008，28，5： | 24 |
| 2 | Air route network optimization in fragmented airspace based on cellular automata显示文摘Air route network optimization,one of the essential parts of the airspace planning,is an effective way to optimize airspace resources,increase airspace capacity,and alleviate air traffic congestion.However,little has been done on the optimization of air route network in the fragmented airspace caused by prohibited,restricted,and dangerous areas(PRDs).In this paper,an air route network optimization model is developed with the total operational cost as the objective function while airspace restriction,air route network capacity,and non-straight-line factors(NSLF) are taken as major constraints.A square grid cellular space,Moore neighbors,a fixed boundary,together with a set of rules for solving the route network optimization model are designed based on cellular automata.The empirical traffic of airports with the largest traffic volume in each of the 9 flight information regions in China's Mainland is collected as the origin-destination(OD) airport pair demands.Based on traffic patterns,the model generates 35 air routes which successfully avoids 144 PRDs.Compared with the current air route network structure,the number of nodes decreases by 41.67%,while the total length of flight segments and air routes drop by 32.03% and 5.82% respectively.The NSLF decreases by 5.82% with changes in the total length of the air route network.More importantly,the total operational cost of the whole network decreases by 6.22%.The computational results show the potential benefits of the model and the advantage of the algorithm.Optimization of air route network can significantly reduce operational cost while ensuring operation safety. | Shijin WANG Xi CAO Haiyun LI Qingyun LI Xu HANG Yanjun WANG | 2017 | Chinese Journal of Aeronautics2017，30，3： | 16 |
| 3 | Early Permian–Late Triassic Magmatism in the Tuotuohe Region of the Qinghai–Tibet Plateau: Constraints on the Tectonic evolution of the Western Segment of the Jinshajiang Suture显示文摘In this paper we present new zircon U–Pb ages, whole-rock major and trace element analyses, and zircon Hf isotopic data for magmatic rocks in the Tuotuohe region of the western segment of the Jinshajiang suture. Our aim is to constrain the Early Permian–Late Triassic tectonic evolution of the region. Zircons from the magmatic rocks of the Tuotuohe region are euhedral–subhedral in shape and display fine-scale oscillatory zoning as well as high Th/U ratios(0.4–4.6), indicating a magmatic origin. The zircon U–Pb ages obtained using LA–ICP–MS are 281 ± 1 Ma, 258 ± 1 Ma, 244 ± 1 Ma, and 216 ± 1 Ma, which indicate magmatism in the Early Permian–Late Triassic. A diorite from Bashihubei(BSHN) has SiO2 = 57.18–59.97 wt%, Al2O3 = 15.70–16.53 wt%, and total alkalis(Na2O + K2O) = 4.46–6.34 wt%, typical of calc-alkaline and metaluminous series. A gabbro from Bashibadaoban(BSBDB) belongs to the alkaline series, and is poor in SiO2(45.46–54.03 wt%) but rich in Al2O3(16.19–17.39 wt%) and total alkalis(Na2O + K2O = 5.48–6.26 wt%). The BSHN diorite and the BSBDB gabbro both display an enrichment of LREEs and LILEs and depletion of HFSEs, and they have no obvious Eu anomaly; they have relatively low MgO contents(2.54–4.93 wt%), Mg# values of 43 to 52, and low Cr and Ni contents(8.07–33.6 ppm and 4.41–14.2 ppm, respectively), indicating they differentiated from primitive mantle magmas. They have low Nb/U, Ta/U, and Ce/Pb ratios(1.3–9.6, 0.2–0.8, and 0.1–18.1, respectively), and their initial Hf isotopic ratios range from +9.6 to +16.9(BSHN diorite) and +6.5 to +12.6(BSBDB gabbro), suggesting their primary magmas were derived mainly from the partial melting of a mantle wedge that had been metasomatized by subduction fluids. Taking all the new data together, we conclude that the western and eastern segment of the Jinshajiang suture regions underwent identical processes of evolution in the Early Permian–Late Triassic: oceanic crust subduction before the Early Permian, continental collision during the Early–Middle Triassic, and post-collisional extension from the Late Triassic. | QIAN Ye SUN Fengyue LI Bile LI Shijin ZHAO Junwei | 2014 | Acta Geologica Sinica(English Edition)2014，88，2： | 12 |
| 4 | Chang'E-1 Lunar Mission:An Overview and Primary Science Results显示文摘Chang'E-1 is the first lunar mission in China,which was successfully launched on Oct.24th,2007.It was guided to crash on the Moon on March 1,2009,at 52.36°E,1.50°S,in the north of Mare Fecunditatis.The total mission lasted 495 days,exceeding the designed life-span about four months.1.37Terabytes raw data was received from Chang'E-1.It was then processed into 4Terabytes science data at different levels.A series of science results have been achieved by analyzing and applicating these data,especially 'global image of the Moon of China's first lunar exploration mission'.Four scientific goals of Chang'E-1 have been achieved.It provides abundant materials for the research of lunar sciences and cosmochemistry.Meanwhile these results will serve for China's future lunar missions. | Ouyang Ziyuan Li Chunlai Lu Chang Liu Jianzhong Zou Yongliao Zhang Hongbo Jianjun Zuo Wei Su Yah Wen Weibin Bian Wei Zhao Baochang Wang Jianyu Yang Jianfeng Chang Jin Wang Huanyu Zhang Xiaohui Wang Shijin Wang Min Ren Xin Mu Lingli Kong Deqing Wang Xiaoqian Wang Fang Geng Liang Zhang Zhoubin Zheng Lei Zhu Xinying Zheng Yongchun Li Junduo Zou Xiaoduan Xu Chun Shi Shuobiao Gao Yifei Gao Guannan | 2010 | 空间科学学报2010，30，5： | 11 |
| 5 | Geochronology, Geochemistry and Sr-Nd-Pb-Hf Isotopes of No. I Complex from the Shitoukengde Ni–Cu Sulfide Deposit in the Eastern Kunlun Orogen, Western China: Implications for the Magmatic Source, Geodynamic Setting and Genesis显示文摘The Shitoukengde Ni-Cu deposit, located in the Eastern Kunlun Orogen, comprises three mafic–ultramafic complexes, with the No. I complex hosting six Ni-Cu orebodies found recently. The deposit is hosted in the small ultramafic bodies intruding Proterozoic metamorphic rocks. Complexes at Shitoukengde contain all kinds of mafic-ultramafic rocks, and olivine websterite and pyroxene peridotite are the most important Ni-Cu-hosted rocks. Zircon U-Pb dating suggests that the Shitoukengde Ni-Cu deposit formed in late Silurian(426–422 Ma), and their zircons have εHf(t) values of-9.4 to 5.9 with the older T_(DM1) ages(0.80–1.42 Ga). Mafic-ultramafic rocks from the No. I complex show the similar rare earth and trace element patterns, which are enriched in light rare earth elements and large ion lithophile elements(e.g., K, Rb, Th) and depleted in heavy rare earth elements and high field strength elements(e.g., Ta, Nb, Zr, Ti). Sulfides from the deposit have the slightly higher δ^(34)S values of 1.9–4.3‰ than the mantle(0 ± 2‰). The major and trace element characteristics, and Sr-Nd-Pb and Hf, S isotopes indicate that their parental magmas originated from a metasomatised, asthenospheric mantle source which had previously been modified by subduction-related fluids, and experienced significant crustal contamination both in the magma chamber and during ascent triggering S oversaturation by addition of S and Si, that resulted in the deposition and enrichment of sulfides. Combined with the tectonic evolution, we suggest that the Shitoukengde Ni-Cu deposit formed in the post-collisional, extensional regime related to the subducted oceanic slab break-off after the Wanbaogou oceanic basalt plateau collaged northward to the Qaidam Block in late Silurian. | LI Liang SUN Fengyue LI Bile LI Shijin CHEN Guangjun WANG Wei YAN Jiaming ZHAO Tuofei DONG Jun ZHANG Dexin | 2018 | Acta Geologica Sinica(English Edition)2018，92，1： | 10 |
| 6 | Optimization of Air Route Network Nodes to Avoid ″Three Areas″ Based on An Adaptive Ant Colony Algorithm显示文摘Air route network(ARN)planning is an efficient way to alleviate civil aviation flight delays caused by increasing development and pressure for safe operation.Here,the ARN shortest path was taken as the objective function,and an air route network node(ARNN)optimization model was developed to circumvent the restrictions imposed by″three areas″,also known as prohibited areas,restricted areas,and dangerous areas(PRDs),by creating agrid environment.And finally the objective function was solved by means of an adaptive ant colony algorithm(AACA).The A593,A470,B221,and G204 air routes in the busy ZSHA flight information region,where the airspace includes areas with different levels of PRDs,were taken as an example.Based on current flight patterns,a layout optimization of the ARNN was computed using this model and algorithm and successfully avoided PRDs.The optimized result reduced the total length of routes by 2.14% and the total cost by 9.875%. | Wang Shijin Li Qingyun Cao Xi Li Haiyun | 2016 | Transactions of Nanjing University of Aeronautics and Astronautics2016，33，4： | 8 |
| 7 | Recent Progress in Automotive Gasoline Direct Injection Engine Technology显示文摘Gasoline direct injection(GDI)engines are currently the dominant powertrains for passenger cars.With the implementation of increasingly stringent fuel consumption and emission regulationsworldwide,GDI engines are facing challenges owing to high particulate matter emissions and a tendency to knock,leading to a change in the research and design(R&D)issues compared with those in the twentieth century.This paper reviews the progress in research regarding GDI engine technologies over the past 20 years,focusing on combustion system configurations,and also highlights common issues in GDI R&D,including pre-ignition and deto-knock,soot formation and PM emissions,injector deposits and gasoline compression ignition(GCI).First,an overview of recent developments in the field as driven by regulations is provided,following which progress in injection and combustion systems is examined.Third,the review addresses the occurrence and mechanism of deto-knock and considers means of suppressing this phenomenon.The fourth section discusses soot formation mechanisms and particulate matter emission characteristics of GDI engines and describes the application of gasoline particulate filter(GPF)after-treatment.The subsequent section summarizes studies regarding injector deposit formation,as well as pioneering research into GCI combustion modes.Finally,a summary and future prospects for GDI engine technologies are provided. | Shijin Shuai Xiao Ma Yanfei Li Yunliang Qi Hongming Xu | 2018 | Automotive Innovation2018，1，2： | 8 |
| 8 | Inhibitory effects of the extracts with different solvents from three compositae plants on cyanobacterium Microcystis aeruginosas显示文摘The algicidal activity of the terrestrial plants is a novel and promising means for alga control of eutrophic waters.In this study,three compositae plants - Artemisia annua(A.annua),Conyza canadensis(C.canadensis),and Erigeron annuus(E.annuus) were selected and antialgal activity of petroleum ether(PE),ethyl acetate(EA) and ethanol extracts of these plants on blue algae Microcystis aeruginosa was investigated.The result shows the EA extracts of these plants present the stronger inhibitory effects.The results of the further separation of PE and EA extracts according to water-solubility and acidity or alkalinity show that fatty acids and terpenoids in A.annua,terpenoids and organic acid in C.Canadensis and E.Annuus may be the main antialgal active constituents.This study suggested that the EA extracts of these plants could become the potential algicide to prevent water blooming. | NI LiXiao HAO XiangYang LI ShiYin CHEN ShiJin REN GaoXiang ZHU Liang | 2011 | Science China Chemistry2011，54，7： | 7 |
| 9 | Combination of biodiesel-ethanol-diesel fuel blend and SCR catalyst assembly to reduce emissions from a heavy-duty diesel engine显示文摘在这研究,减少 NOx 和微粒的努力有关系(下午) 从两个都使用 NOx overanAg/Al2O3 催化剂和 biodiesel-ethanol-diesel 燃料的乙醇选择的催化减小(SCR ) 的一个柴油发动机的排出物相配(柴油机) 在一张引擎凳子上,测试被讨论。与柴油相比,柴油机的使用由于下午的可溶的器官的部分(SOF ) 的增加增加了下午排出物 14% ,但是它极大地减少了 Bosch 烟数字由 60%80% 根据从欧洲静止周期(转换字符) 的 13 模式测试的结果测试。SCR 催化剂在由乙醇的 NOx 减小是有效的,并且 NOx 变换是约 73% 。全部的烃(THC ) 和公司排出物在 NOx 过程的 SCR 期间显著地增加了。二个柴油机氧化催化剂(文档) 集会在 Ag/Al2O3 变换器以后被使用移开公司和 HC。不同氧化催化剂在下午排放上出现在效果对面。下午作文分析表明在彻底的下午的氧化催化剂的网效果是 SOF 减小和下午的硫酸盐形成上的综合效果。引擎凳子测试结果显示甚至没有使用柴油机粒子过滤器(DPF ) ,柴油机和一个 SCR 催化剂集会的联合能为 NOx 和下午排出物控制提供好处。 | SHI Xiaoyan YU Yunbo HE Hong SHUAI Shijin DONG Hongyi LI Rulong | 2008 | Journal of Environmental Sciences2008，20，2： | 6 |
| 10 | Research Progress of Active Ingredients and Pharmacological Action of Honeysuckle显示文摘Honeysuckle,the dry flower bud or with open flower of Lonicera japonica in caprifoliaceae,has been touted as a cure-all for heat-clearing and detoxifying effect.Honeysuckle contains abundant components such as volatile oil,flavonoids and organic acids,playing the role of antibiosis,antivirus,antiphlogosis,immunopotentiation and antioxidation.The active ingredients and pharmacological action of honeysuckle are reviewed in the paper,so as to lay the foundation for further application of honeysuckle in veterinary clinic. | Zhang Zhimei Guo Shijin Fu Shijun Xu Qianqian Yang Limei Zhang Ying Wang Yanping Ma Li Wang Jianjun Shen Zhiqiang | 2014 | Animal Husbandry and Feed Science2014，6，1： | 4 |
| 11 | Distribution of glycerol dialkyl glycerol tetraethers in surface soils along an altitudinal transect at cold and humid Mountain Changbai:Implications for the reconstruction of paleoaltimetry and paleoclimate显示文摘Glycerol Dialkyl Glycerol Tetraethers(GDGTs)serve as important tools for the quantitative reconstruction of paleoclimate and paleoecology in both continental and marine environments.Previous studies of GDGTs in the terrestrial environments focused primarily on the soils from the relatively warm-humid or cold-dry regions.However,it is still unclear how GDGTs respond to environmental variables in the cold-humid regions.Here,we collected soils along an altitudinal transect of Mountain(Mt.)Changbai,which has a typical cold-humid climate,to investigate the distribution of GDGTs and the response of GDGT-based proxies to changes in climate along the transect.The shift in the distribution of archaeal isoprenoidal GDGTs(iso GDGTs)revealed that the archaeal community varied significantly along the transect,which can affect the relationship between TEX_(86)and mean annual air temperature(MAT).In addition,the increased temperature seasonality at higher altitudes exerted a significant impact on TEX_(86).We proposed a global calibration of TEX_(86)for the growing season temperature reconstruction in the soil environments:T=85.19×TEX_(86)-46.30(R^2=0.84,p<0.001).The methylation indices for 5-methyl branched GDGTs(br GDGTs)including MBT′_(5me)and MBT_(5/6),showed correlation with soil water content but no relationship with MAT,indicating that MBT′_(5me)and MBT_(5/6)from cold-humid environments may be not suitable for temperature and altitude reconstruction.In contrast,the recently developed p H proxies,including MBT′_(6me)(the methylation index for 6-methyl br GDGTs),CBT(Cyclisation index of Branched Tetraethers),IR_(IIa’)(Isomer ratio of IIa′)and IR_(IIIa′)(Isomer ratio of IIIa′)exhibited significant correlations with soil p H,suggesting these proxies can still be used for soil p H reconstruction in the coldhumid regions.The combination of MBT′_(5me)and MBT′_(6me)was strongly related to different types of climate(cold-dry,warmhumid,cold-humid,and warm-dry).For example,MBT′_(5me)<0.65 and MBT′_(6me)>0.55 are diagnostic for the cold-humid climate.Thus,the combination of MBT′_(5me)and MBT′_(6me)has the potential as a tool for the identification of different types of paleoclimate. | Yue LI Shijin ZHAO Hongye PEI Shi QIAN Jingiie ZANG Xinyue DANG Huan YANG | 2018 | Science China Earth Sciences2018，61，7： | 4 |
| 12 | Effects of Shuanghuanglian Propolis Oral Liquid on Growth Performance,Slaughter Performance and Meat Quality of Broilers显示文摘[Objective] The paper was to investigate the effects of adding Shuanghuanglian propolis oral liquid in drinking water on growth performance,slaughter performance and meat quality of broilers. [Method]Ninety one-day-old broilers were randomly divided into three groups( group Ⅰ,group Ⅱ and group Ⅲ) : group Ⅰ was the control group,and groups Ⅱ and Ⅲ were added 0. 5 and 1. 0 mL / L Shuanghuanglian propolis oral liquid in drinking water,respectively.[Result] Compared with broilers in group I,the average daily feed intakes of broilers in group Ⅱ and group Ⅲ were increased by 0. 86%( P > 0. 05) and 1. 10%( P > 0. 05),respectively; the average daily gains were increased by 2. 33%( P < 0. 05) and 4. 43%( P < 0. 05),respectively; the feed gain ratios were decreased by 1. 05%( P >0. 05) and 2. 63%( P <0. 05),respectively; the slaughter rates were increased by 0. 94%( P >0. 05) and 1. 70%( P <0. 05),respectively; the eviscerated rates were increased by 0. 52%( P > 0. 05) and 1. 15%( P > 0. 05),respectively; the semi-eviscerated rates were increased by 1. 51%( P < 0. 05) and 2.23%( P < 0. 05),respectively; the breast muscle rates were increased by 3. 77%( P < 0. 05) and 5. 51%( P < 0. 05),respectively; the leg muscle rates were increased by 1. 96%( P > 0. 05) and 4. 09%( P < 0. 05),respectively; the lightness( L*) were decreased by 0. 96%( P > 0. 05) and 1. 47%( P > 0. 05),respectively; the redness( a*) were increased by 1. 24%( P < 0. 05) and 1. 86%( P < 0. 05),respectively; the yellowness( b*) were decreased by 0. 44%( P >0. 05) and 1. 03%( P <0. 05),respectively; the drip losses were decreased by 1. 22%( P <0. 05) and 1. 56%( P <0. 05),respectively; the cooking losses were decreased by 1. 76%( P > 0. 05) and 2. 89%( P < 0. 05),respectively. [Conclusion]Adding 0. 5 and 1. 0 mL / L Shuanghuanglian propolis oral liquid in drinking water could improve growth performance,slaughter performance,meat quality of broilers,and the dose of 1. 0 mL / L is recommended in clinical application. | Ma Li Yang Limei Shen Zhiqiang Wang Yanping Xu Qianqian Zhang Ying Guo Shijin | 2016 | Animal Husbandry and Feed Science2016，8，4： | 4 |
| 13 | CNOP-P-based parameter sensitivity for double-gyre variation in ROMS with simulated annealing algorithm显示文摘Reducing the error of sensitive parameters by studying the parameters sensitivity can reduce the uncertainty of the model,while simulating double-gyre variation in Regional Ocean Modeling System(ROMS).Conditional Nonlinear Optimal Perturbation related to Parameter(CNOP-P)is an effective method of studying the parameters sensitivity,which represents a type of parameter error with maximum nonlinear development at the prediction time.Intelligent algorithms have been widely applied to solving Conditional Nonlinear Optimal Perturbation(CNOP).In the paper,we proposed an improved simulated annealing(SA)algorithm to solve CNOP-P to get the optimal parameters error,studied the sensitivity of the single parameter and the combination of multiple parameters and verified the effect of reducing the error of sensitive parameters on reducing the uncertainty of model simulation.Specifically,we firstly found the non-period oscillation of kinetic energy time series of double gyre variation,then extracted two transition periods,which are respectively from high energy to low energy and from low energy to high energy.For every transition period,three parameters,respectively wind amplitude(WD),viscosity coefficient(VC)and linear bottom drag coefficient(RDRG),were studied by CNOP-P solved with SA algorithm.Finally,for sensitive parameters,their effect on model simulation is verified.Experiments results showed that the sensitivity order is WD>VC>>RDRG,the effect of the combination of multiple sensitive parameters is greater than that of single parameter superposition and the reduction of error of sensitive parameters can effectively reduce model prediction error which confirmed the importance of sensitive parameters analysis. | YUAN Shijin ZHANG Huazhen LI Mi MU Bin | 2019 | Journal of Oceanology and Limnology2019，37，3： | 3 |
| 14 | Hierarchical Carbon Microtube@Nanotube Core-Shell Structure for High-Performance Oxygen Electrocatalysis and Zn-Air Battery显示文摘Zinc-air batteries(ZABs)hold tremendous promise for clean and efficient energy storage with the merits of high theoretical energy density and environmental friendliness.However,the performance of practical ZABs is still unsatisfactory because of the inevitably decreased activity of electrocatalysts when assembly into a thick electrode with high mass loading.Herein,we report a hierarchical electrocatalyst based on carbon microtube@nanotube core-shell nanostructure(CMT@CNT),which demonstrates superior electrocatalytic activity for oxygen reduction reaction and oxygen evolution reaction with a small potential gap of 0.678 V.Remarkably,when being employed as air-cathode in ZAB,the CMT@CNT presents an excellent performance with a high power density(160.6 mW cm^−2),specific capacity(781.7 mAhgZn^−1)as well as long cycle stability(117 h,351 cycles).Moreover,the ZAB performance of CMT@CNT is maintained well even under high mass loading(3 mg cm−2,three times as much as traditional usage),which could afford high power density and energy density for advanced electronic equipment.We believe that this work is promising for the rational design of hierarchical structured electrocatalysts for advanced metal-air batteries. | Wenfu Xie Jianming Li Yuke Song Shijin Li Jianbo Li Mingfei Shao | 2020 | Nano-Micro Letters2020，12，8： | 3 |
| 15 | Cutting path-dependent machinability of SiCp/Al composite under multi-step ultra-precision diamond cutting显示文摘Particle-tool interactions,which govern the synergetic deformation of SiC particle reinforced Al matrix composites under mechanical machining,strongly depend on the geometry of particle position residing on cutting path.In the present work,we investigate the influence of cutting path on the machinability of a SiCp/Al composite in multi-step ultra-precision diamond cutting by combining finite element simulations with experimental observations and characterization.Be consistent with experimentally characterized microstructures,the simulated SiCp/Al composite is considered to be composed of randomly distributed polygonally-shaped SiC particles with a volume fraction of 25 vol%.A multi-step cutting strategy with depths of cut ranging from 2 to 10 lm is adopted to achieve an ultimate depth of cut of 10 lm.Intrinsic material parameters and extrinsic cutting conditions utilized in finite element simulations of SiCp/Al cutting are consistent with those used in corresponding experiments.Simulation results reveal different particle-tool interactions and failure modes of SiC particles,as well as their correlations with machining force evolution,residual stress distribution and machined surface topography.A detailed comparison between numerical simulation results and experimental data of multi-step diamond cutting of SiCp/Al composite reveals a substantial impact of the number of cutting steps on particle-tool interactions and machined surface quality.These findings provide guidelines for achieving high surface finish of SiCp/Al composites by ultra-precision diamond cutting. | Shijin LU Junjie ZHANG Zengqiang LI Jianguo ZHANG Xiaohui WANG Alexander HARTMAIER Jianfeng XU Yongda YAN Tao SUN | 2021 | Chinese Journal of Aeronautics2021，34，4： | 3 |
| 16 | Simulation and experimental research on methods to suppress ferroresonance in potential transformers显示文摘Ferroresonance in distribution networks is usually hard to be identified and predicted because it is nonlinear and dependent on multiple factors and conditions.This study discusses different common antiferroresonance methods by numerical simulations and experimental tests.In order to study the reliability of the anti-ferroresonance measures,a 10 kV ferroresonance testing system was setup.Then a number of simulations and experiments were carried out to show the ferroresonance phenomena initiated by single-phase grounding faults and/or single-phase disconnection faults.In addition,potential transformer models with the characteristic of non-linear magnetic excitation were developed and used in PSCAD-based simulation studies.These studies investigated the performance of primary resonance eliminators and arc suppression coils on restraining the ferroresonance under multiple power system parameters and initialisations.In addition,a joint anti-ferroresonance method is proposed and verified.The simulation and experimental studies can provide guidelines for evaluating the anti-ferroresonance methods in distribution networks. | Hongwen Liu Ke Wang Junhui Zhao Hao Li Shijin Tian | 2018 | Journal of Control and Decision2018，5，2： | 2 |
| 17 | The space environment monitor aboard FY-2 satellite显示文摘The space environment monitor (SEM) aboard FY-2 satellite consists of the high energy particle detector (HEPD) and the solar X-ray flux detector (SXFD). The SEM can provide real-time monitoring of flare and solar proton event for its operation at geostationary orbit and is also the first Chinese space system for monitoring and alerting solar proton event. During the 23rd solar maximum cycle, almost all the solar proton events that took place in this period are monitored and some of them are predicted successfully by analyzing the characteristics of X-ray flare monitored by the SEM. Some basic variation characteristics of particle at geostationary orbit are found such as day-night periodic variation of particle flux, the electron flux with energy >1.4 MeV in the scope from 10 to 200/cm2.s-sr and the proton flux with energy >1.1 MeV in the scope from 600 to 8000/cm2-s.sr during the time with no magnetic storm and solar eruption. | ZHU Guangwu LI Baoquan WANG Shijin LIN Hua'an LIANG Jinbao SUN Yueqiang WU Weiqi | 2005 | Science China(Physics,Mechanics & Astronomy)2005，48，1： | 2 |
| 18 | Optimal precursors of double-gyre regime transitions with an adjoint-free method显示文摘In this paper, we find the optimal precursors which can cause double-gyre regime transitions based on conditional nonlinear optimal perturbation (CNOP) method with Regional Ocean Modeling System (ROMS). Firstly, we simulate the multiple-equilibria regimes of double-gyre circulation under different viscosity coefficient and obtain the bifurcation diagram, then choose two equilibrium states (called jet-up state and jet-down state) as reference states respectively, propose Principal Component Analysis-based Simulated Annealing (PCASA) algorithm to solve CNOP-type initial perturbations which can induce double-gyre regime transitions between jet-up state and jet-down state. PCASA algorithm is an adjoint-free method which searches optimal solution randomly in the whole solution space. In addition, we investigate CNOP-type initial perturbations how to evolve with time. The results show:(1) the CNOP-type perturbations present a two-cell structure, and gradually evolves into a three-cell structure at predictive time;(2) by superimposing CNOP-type perturbations on the jet-up state and integrating ROMS, double-gyre circulation transfers from jet-up state to jet-down state, and vice versa, and random initial perturbations don't cause the transitions, which means CNOP-type perturbations are the optimal precursors of double-gyre regime transitions;(3) by analyzing the transition process of double-gyre regime transitions, we find that CNOP-type initial perturbations obtain energy from the background state through both barotropic and baroclinic instabilities, and barotropic instability contributes more significantly to the fast-growth of the perturbations. The optimal precursors and the dynamic mechanism of double-gyre regime transitions revealed in this paper have an important significance to enhance the predictability of double-gyre circulation. | YUAN Shijin LI Mi WANG Qiang ZHANG Kun ZHANG Huazhen MU Bin | 2019 | Journal of Oceanology and Limnology2019，37，4： | 1 |
| 19 | A generalized foley-sammon transform based on generalized fisher discriminant criterion and its application to face recognition显示文摘 | Guo Yuefei Li Shijin Yang Jingyu | 2003 | Pattern Recognition Letter2003，24，： | 1 |
| 20 | Advance in Effect of Veterinary Drug Residues on Ecological Environment显示文摘Thousands of tons of pharmaceutically active substances are used in veterinary medicines in intensive livestock and poultry production,but most of the drugs are poorly absorbed by animals and excreted with the animal feces. The veterinary medicines can cause various kinds of harmful impact to the environment.Now the relevant research has been a hot all over the world. With the feces excreted to the environment,the veterinary medicines can be accumulated in the soil and water,and produce all sorts of reaction. Some medicines can cause toxic effect to animals,plants and microorganisms. The article summarized the residue,the environmental impact,the transformation and the development direction of the veterinary medicine in the environment to supply frame of reference for further research. | Zhang Zhimei Fu Shijun Guo Shijin Zhang Ying Ma Li Yang Limei Wang Jianjun Shen Zhiqiang | 2015 | Animal Husbandry and Feed Science2015，7，3： | 1 |
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