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| 1 | Metamodel-based Global Optimization Using Fuzzy Clustering for Design Space Reduction显示文摘High fidelity analysis are utilized in modern engineering design optimization problems which involve expensive black-box models.For computation-intensive engineering design problems,efficient global optimization methods must be developed to relieve the computational burden.A new metamodel-based global optimization method using fuzzy clustering for design space reduction(MGO-FCR) is presented.The uniformly distributed initial sample points are generated by Latin hypercube design to construct the radial basis function metamodel,whose accuracy is improved with increasing number of sample points gradually.Fuzzy c-mean method and Gath-Geva clustering method are applied to divide the design space into several small interesting cluster spaces for low and high dimensional problems respectively.Modeling efficiency and accuracy are directly related to the design space,so unconcerned spaces are eliminated by the proposed reduction principle and two pseudo reduction algorithms.The reduction principle is developed to determine whether the current design space should be reduced and which space is eliminated.The first pseudo reduction algorithm improves the speed of clustering,while the second pseudo reduction algorithm ensures the design space to be reduced.Through several numerical benchmark functions,comparative studies with adaptive response surface method,approximated unimodal region elimination method and mode-pursuing sampling are carried out.The optimization results reveal that this method captures the real global optimum for all the numerical benchmark functions.And the number of function evaluations show that the efficiency of this method is favorable especially for high dimensional problems.Based on this global design optimization method,a design optimization of a lifting surface in high speed flow is carried out and this method saves about 10 h compared with genetic algorithms.This method possesses favorable performance on efficiency,robustness and capability of global convergence and gives a new optimization strategy for engineering design optimization problems involving expensive black box models. | LI Yulin LIU Li LONG Teng DONG Weili | 2013 | Chinese Journal of Mechanical Engineering2013，26，5： | 13 |
| 2 | Export competitiveness of agricultural products and agricultural sustainability in China显示文摘The competitiveness of a country’s agricultural products is not only related to its capacity to export agricultural products,but also to the sustainability of its agricultural sector.How to improve the international competitiveness of a country’s agricultural products while maintaining the sustainability of its agricultural sector is a practical problem of great urgency for a country with a large agricultural sector such as China.With this in mind,this study should have a considerable policy and practical significance.We used two evaluation indices,namely trade competitiveness(TC)index and revealed comparative advantage(RCA)index,to measure and analyze the international competitiveness of six China’s representative agricultural products,i.e.,live pigs,live chickens,live cattle,apples,tea,and beer,and to examine the changing trends of these products’competitiveness during 1994-2013.The results indicate that the export competitiveness of China’s agricultural products is weak and likely to deteriorate further.However,some traditional agricultural products with distinctive regional characteristics,for example,tea and live pigs,are relatively strong internationally.To this end,China should vigorously promote the production and foreign trade in traditional agricultural products with distinctive regional characteristics.At the same time,comprehensive measures should be taken to enhance the international competitiveness of disadvantaged agricultural products. | LONG Yulin | 2021 | Regional Sustainability2021，2，3： | 2 |
| 3 | Oxygen vacancies enriched nickel cobalt based nanoflower cathodes: Mechanism and application of the enhanced energy storage显示文摘The rational design of oxygen vacancies and electronic microstructures of electrode materials for energy storage devices still remains a challenge. Herein, we synthesize nickel cobalt-based oxides nanoflower arrays assembled with nanowires grown on Ni foam via the hydrothermal process followed annealing process in air and argon atmospheres respectively. It is found that the annealing atmosphere has a vital influence on the oxygen vacancies and electronic microstructures of resulting NiCo_(2)O_(4) (NCO-Air) and CoNiO_(2) (NCO-Ar) products, which NCO-Ar has more oxygen vacancies and larger specific surface area of 163.48 m^(2)/g. The density functional theory calculation reveals that more oxygen vacancies can provide more electrons to adsorb –OH free anions resulting in superior electrochemical energy storage performance. Therefore, the assembled asymmetric supercapacitor of NCO-Ar//active carbon delivers an excellent energy density of 112.52 Wh/kg at a power density of 558.73 W/kg and the fabricated NCO-Ar//Zn battery presents the specific capacity of 180.20 mAh/g and energy density of 308.14 Wh/kg. The experimental measurement and theoretical calculation not only provide a facile strategy to construct flower-like mesoporous architectures with massive oxygen vacancies, but also demonstrate that NCO-Ar is an ideal electrode material for the next generation of energy storage devices. | Jiahui Ye Xingwu Zhai Long Chen Wen Guo Tiantian Gu Yulin Shi Juan Hou Fei Han Yi Liu Changchun Fan Gang Wang Shanglong Peng Xuhong Guo | 2021 | Journal of Energy Chemistry2021，30，11： | 2 |
| 4 | NiCo_(2)S_(4)/N microspheres grown on N,S co-doped reduced graphene oxide as an efficient bifunctional electrocatalyst for overall water splitting in alkaline and neutral pH显示文摘It is of vital importance to design efficient and low-cost bifunctional catalysts for the electrochemical water splitting under alkaline and neutral pH conditions.In this work,we report an efficient and stable NiCo_(2)S_(4)/N,S co-doped reduced graphene oxide(NCS/NS-rGO)electrocatalyst for water splitting,in which NCS microspheres are composed of one-dimentional(1D)nanorods grown homogeneously on the surface of NS-rGOs).The synergetic effect,abundant active sites,and hybridization of NCS/NS-rGO endow their outstanding electrocatalytic performance for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)in both alkaline and neutral conditions.Furthermore,NCS/NS-rGO employed as both anode and cathode in a two-electrode alkaline and neutral system electrolyzers deliver 10 mA/cm^(2) with the low cell voltage of 1.58 V in alkaline and 1.91 V in neutral condition.These results illustrate the rational design of carbon-supported nickel-cobalt based bifunctional materials for practical water splitting over a wide pH range. | Haoquan Li Long Chen Pengfei Jin Yafei Li Jianxiang Pang Juan Hou Shanglong Peng Gang Wang Yulin Shi | 2022 | Nano Research2022，15，2： | 1 |
| 5 | Exogenous Spermidine Promotes Somatic Embryogenesis of Cunninghamia lanceolata by Altering the Endogenous Phytohormone Content显示文摘In order to study how exogenous hormones in C.lanceolata(gymnosperm)regulate somatic embryogenesis,we measured the endogenous phytohormones of two genotypes with different somatic embryogenesis efficiency and found that an increase in endogenous concentrations of IAA and ABA may be correlated to more efficient somatic embryogenesis.By applying exogenous spermidine,we found that exogenous hormones may affect somatic embryogenesis efficiency through affecting the endogenous phytohormone content.Based on these results,further studies can be conducted whereby the concentration of exogenous hormones or the levels of endogenous phytohormones by molecular methods are regulated to promote somatic embryogenesis.Our research may benefit the long-term economic output of the forestry industry and lays the foundation to studying the molecular mechanism that controls somatic embryogenesis efficiency. | Dandan Wang Yulin Guo Xiaofei Long Yan Pan Dingjie Yang Rui Li Ye Lu Ying Chen Jisen Shi Jinhui Chen | 2020 | Phyton-International Journal of Experimental Botany2020，89，1： | 1 |
| 6 | Emergy Analysis of the Agricultural Eco-economic System in Dongting Lake Area of Hunan Province显示文摘[Objective]The research aimed to discuss eco-efficiency of the agro-ecosystem in Dongting Lake area of Hunan.[Method]By referring to emergy research method,emergy structure,function and efficiency of the system were analyzed according to emergy input-output data of the system in 2009.[Result]The system had developed economy,and mechanization and modernization degrees were higher.Emergy output of the system was unbalanced,and market pricing of the agricultural product was significantly lower,especially farming product.Seen from sustainable development index and environmental loading ratio of the system,the system was full of vitality and development potential.The pressure of natural resources and environment was not very great,but the system accommodated too many populations.[Conclusion]Basic direction of the agricultural policy in the zone was further shortening industrial and agricultural price scissors,continuing to implement price protection of the farming product,adjusting agricultural and product structures and transferring surplus labor. | Yulin Zhu Chang Tan Mingjie Li Yuzi Long Maoxi Wang Maozhang Hou Xiaomin Li | 2013 | Meteorological and Environmental Research2013，4，11： | 0 |
| 7 | 2-21 Attempt to Study the a-decay of 216U by 40Ca+natHf Reaction显示文摘An attempt has been made recently to synthesize very neutron-decient 216U isotope in 40Ca+natHf reaction atthe gas-lled recoil separator SHANS[1]. A beam of 40Ca12+ at an energy of Elab=194.6 MeV was delivered by thesector focusing cyclotron of the Heavy Ion Research Facility in Lanzhou (HIRFL). The average beam intensity wasabout 100 pnA. Self-support targets of natural hafnium foils with thickness of 420 g/cm2 was mounted in a edframe. Evaporation residues recoiled from the target were separated from the primary beam by the separator andthen implanted into the Si-box detector (consist of three position sensitive silicon detectors and eight non-positionsensitive silicon detectors)[2]. In order to distinguish the -decay events from the implantation events, two multi-wire proportional counters (MWPCs) were mounted upstream from the Si-box detector. Behind the Si-box detectora fourfold segmented Clover detector was installed for -ray studies. | Yang Huabin Zhang Zhiyuan Ma Long Yu Lin Jiang Jian Gan Zaiguo Wang Jianguo Tian Yulin Huang Tianheng Wang Yongsheng Sun Mingdao | 2014 | IMP & HIRFL Annual Report2014，，1： | 0 |
| 8 | Research on Influence of Guilin Topography on Haze显示文摘This paper analyzed space-time distribution features of haze at different topographical representative stations using haze days observation data of 50 years in different meteorological observatories of Guilin to study the topography influence on haze. Different topographical representative stations were classified into four types of mountain,hill,river and city. Mountain stations were classified into two types,surrounded by mountains and faced with mountains on two sides. Under parallel comparison method,change features of wind direction,wind speed,temperature and haze days at different meteorological observatories were analyzed to investigate the topography influence on haze with pollution increase factors excluded. The study found that the city station had the biggest haze occurrence rate,followed by the mountain station surrounded by the mountains,and the river station had the smallest haze occurrence rate. Urban heat island wind can easily cause urban pollutants concentration around the city center,and the terrain blocking to the wind is not conducive to the spread of pollutants,but the water vapor over the river can reduce the haze. | Long Fengxiang Bai Xianda Zhang Yulin | 2017 | Meteorological and Environmental Research2017，8，4： | 0 |
| 9 | Space Life Science of China显示文摘In the past two years,China’s space life science has made great progress.Space biomedical and life science programs have carried out ground-based research for the first batch of projects,and are preparing to carry out space-based experiments along with the construction of China’s space station.And space life science payload of the space station completed the development of positive samples.Thus,with the development of lunar exploration and Mars exploration projects,astrobiology research has also made a lot of basic achievements.On the basis of summarizing the development of space life science in China,this paper mainly introduces the important progress of payload technology and life science research. | MA Hong CHEN Yu REN Hao LI Xiaoqiong YANG Chunhua LI Bo HAN Chu ZHANG Ying LI Yujuan LONG Mian ZHUANG Fengyuan DENG Yulin | 2020 | 空间科学学报2020，40，5： | 0 |
| 10 | 利用^(36)Ar与^(40)Ar束流合成非常缺中子的锕系核显示文摘In order to systematically investigate the-decay properties of U-isotopes near the N=126 shell and study the fine structures of 218Pa and 211−213Th,enriched targets,180W,182Wand 176Hf,were bombarded by the 36Ar and 40Ar beams provided the Heavy Ion Research Facility in Lanzhou(HIRFL).Combinations of beam and target as well as the beam energy,beam intensity,target thickness,irradiation time were listed in Table 1.Fusion-evaporation residues(ERs)were recoiled from the targets and separated from the primary beams using the gas filled recoil separator,SHANS[1].After passing through a multi-wire proportional chamber,the ERs were implanted into a Si-box detector[2]amounted at the focal plane of SHANS.Gamma rays emitted from the ERs were detected by three Ge detectors attached to the Si-box.All-decay and gamma-ray signals were registered and proceeded by a digital data acquisition system. | Huang Minghui Gan Zaiguo Zhang Zhiyuan Yang Huabin Ma Long Yang Chunli Zhao Zhen Wang Jianguo Tian Yulin Wang Yongsheng Zhou Houbing Zhou Shangui He Xiaotao Wang Shouyu | 2018 | IMP & HIRFL Annual Report2018，，1： | 0 |
| 11 | New Short-lived Neutron-de cient Isotope ^(220)Np显示文摘Alpha decay,as a pervasive decay mode of unstable heavy nuclei,plays a crucial role in the identification of new superheavy elements and investigation on nuclear structure of exotic nuclei near the proton drip line. | Zhang Zhiyuan Gan Zaiguo Yang Huabin Ma Long Huang Minghui Yang Chunli Zhang Mingming Tian Yulin Wang Yongsheng Sun Mingdao Lu Hongyang Zhang Wenqiang Zhou Houbin Wang Xiang Wu Chenguang Duan Limin Huang Wenxue Liu Zhong Ren Zhongzhou Zhou Shangui Zhou Xiaohong Xu Hushan Tsyganov Yury Voinov Alexey Polyakov Alexander | 2019 | IMP & HIRFL Annual Report2019，，1： | 0 |
| 12 | Transport and inhibition mechanism for VMAT2-mediated synaptic vesicle loading of monoamines显示文摘Monoamine neurotransmitters such as serotonin and dopamine are loaded by vesicular monoamine transporter 2(VMAT2)into synaptic vesicles for storage and subsequent release in neurons.Impaired VMAT2 function underlies various neuropsychiatric diseases.VMAT2 inhibitors reserpine and tetrabenazine are used to treat hypertension,movement disorders associated with Huntington’s Disease and Tardive Dyskinesia.Despite its physiological and pharmacological significance,the structural basis underlying VMAT2 substrate recognition and its inhibition by various inhibitors remains unknown.Here we present cryo-EM structures of human apo VMAT2 in addition to states bound to serotonin,tetrabenazine,and reserpine.These structures collectively capture three states,namely the lumen-facing,occluded,and cytosol-facing conformations.Notably,tetrabenazine induces a substantial rearrangement of TM2 and TM7,extending beyond the typical rocker-switch movement.These functionally dynamic snapshots,complemented by biochemical analysis,unveil the essential components responsible for ligand recognition,elucidate the proton-driven exchange cycle,and provide a framework to design improved pharmaceutics targeting VMAT2. | Yuwei Wang Pei Zhang Yulin Chao Zhini Zhu Chuanhui Yang Zixuan Zhou Yaohui Li Yonghui Long Yuehua Liu Dianfan Li Sheng Wang Qianhui Qu | 2024 | Cell Research2024，34，1： | 0 |
| 13 | 2-14 Production of New Nuclides 216U and 215U显示文摘The study on the decay properties of new isotopes located far from the beta stability line is current the focus of nuclear physics. For isotopes in the region Z >82 and N <126, -emission prevails as radioactive decay mode and -spectroscopy is the most important tool to obtain information on the nuclear structure. In the heavy nuclei region with N=124 and 126 isotones, an intruder state (h9=2.f7=2)8+ based on the attractive interaction of f7=2 protons and f5=2 neutrons has been significantly observed, which increases the binding energy of this configuration with increasing proton number. | Yang Huabin Gan Zaiguo Zhang Zhiyuan Ma Long Yu Lin Jiang Jian Wang Jianguo Tian Yulin Wang Yongsheng Ding Bing Sun Mingdao Huang Tianheng Wang Kailong | 2015 | IMP & HIRFL Annual Report2015，，1： | 0 |
| 14 | Space Life Science of China显示文摘With the human space exploration activities, space life science is an emerging interdiscipline,which covers a wide range of researches. Based on our country's manned space station and recoverable satellite science experimental platform, the development of space life science research is very important to acquire new knowledge or new technological innovation, to give further services to the human space exploration activities,to improve the national economic and social development. Both ground-based and flight applied studies were continuously performed in the previous 2 years. Here, we review and summarize the researches on space life sciences contributed by Chinese scientists. | MA Hong REN Hao LI Xiaoqiong YANG Chunhua CHEN Yu WANG Rui YING Zhang WANG Changyong ZHOU Jin LI Hong JIANG Xiaoxia ZHANG Fengzhi HAO Tong ZHU Huimin DONG Xiaohui ZHENG Huiqiong WANG Lihua SUN Weining TONG Guanghui ZHENG Weibo ZHANG Tao LONG Mian LIU Hong ZHUANG Fengyuan DENG Yulin | 2018 | 空间科学学报2018，38，5： | 0 |
| 15 | Linear Power Amplifier Modeling Based on Predistortion Technology显示文摘Different power amplifier(PA) models have their own effects on PA linearization. In this paper, the nonlinear characteristic of the radio frequency power amplifier(RF PA) is simulated based on the two models combining predistortion technology, and the nonlinear effects of the two models are analyzed, respectively. The simulation results show that Power Series model normalized mean square error(NMSE) is-37.8 d B, which is less than Power Series model-30.4 d B before loading predistortion technology. NMSE of the two systems are-23.4 d B and-26.0 d B respectively, while Saleh model compensates better than the Power Series model combing predistortion technology. The error vector magnitude(EVM) of Power Series model is only 6.75%, whereas the Saleh model EVM is 9.99%, indicating that Power Series model can better describe the nonlinear characteristic of PA. It will have a positive effect on improving the power utilization of wireless communication system. | XIE Yulin XIE Wei CHEN Long XIONG Jie LEI Gui | 2017 | Wuhan University Journal of Natural Sciences2017，22，5： | 0 |
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