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Suitability projection for Chinese ski areas under future natural andsocioeconomic scenarios

Advances in Climate Change Research 2021年第2期12卷 224-239页

作者： DeNG Jie che Tao JIANG Tong DAI Li-Yun Heihe Remote Sensing experimental Research Station Key Laboratory of Remote Sensing of Gansu ProvinceNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou730000China Center for excellence in Tibetan Plateau earth Sciences Chinese Academy of SciencesBeijing100101China University of Chinese Academy of Sciences Beijing100049China Collaborative Innovation Center on Forecast and evaluation of Meteorological Disaster School of Geographic SciencesNanjing University of InformationScience&TechnologyNanjing210044China Jiangsu Center of Collaborative Innovation in Geographical Information Resource Development and Application Nanjing210000China

Ski tourism is extremely sensitive to climate change and is also heavily affected by socioeconomic *** some ski areas arestill profitable under current climate and socioeconomic conditions,they will become difficult to operate in the face of rising winter temper-atures,which will result in further economic losses,resource waste and environmental *** study projects variability in the suitability ofski area development across China in the coming *** suitability under three representative concentration pathway emission sce-narios(RCP2.6,RCP4.5 and RCP8.5),socioeconomic suitability under four shared socioeconomic pathways(SSP1,SSP2,SSP3,and SSP5)andintegrated suitability under four climatic-socioeconomic scenarios(RCP2.6-SSP1,RCP4.5-SSP2,RCP8.5-SSP3,and RCP8.5-SSP5)are ***,the suitability of 731 existing ski areas in China is *** results show a substantial decline in integrated suitabilityfor most regions of China except for some very cold areas,where higher air temperatures will make visitors feel more comfortable and therelatively poor socioeconomic conditions will improve in the 2030s,2050s and *** average higher integrated suitability area(integratedsuitability values greater than 0.5)under four climatic-socioeconomic scenarios decreases from the current 29.9%e14.4%,5.0%and 4.5%bythe 2030s,2050s and 2090s,*** RCP2.6-SSP1,the higher integrated suitability area is projected to decrease from the current28.0%e5.2%by the 2050s and then increase to 5.3%by the *** RCP4.5-SSP2,RCP8.5-SSP3,and RCP8.5-SSP5,the higher inte-grated suitability area is projected to continuously decrease from 30.3%,30.6%and 30.6%in the 2010s to 4.1%,4.4%and 4.4%in the 2090s,*** the 2090s,41,138 and 277 existing ski areas are projected to be closed under RCP2.6-SSP1,RCP4.5-SSP2,and RCP8.5-SSP3/RCP8.5-SSP5,*** is clear that emission pathways and climate change adaptation and mitigation

关键词： Suitability Ski tourism Climate change Socioeconomic development China

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User Selection Algorithms for Lowering Cross-Tier Interference in Heterogeneous Network

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China Communications 2016年第S1期13卷 116-123页

作者： che Linlin HAO Conghui HAN Dongsheng cheN Zhixiong School of electrical and electronic engineering North China Electric Power University

To lower the cross-tier intercell interference(ICI) between macrocell and microcell,three user selection algorithms for the heterogeneous network were proposed in this paper, assuming full knowledge of channelstate information at the transmitter. Algorithm 1 chooses microcell users whose interference channel matrix is parallel to that of a known user and targets at increasing user SINR. Algorithm 2 takes effect of chordal distance-channel norm balance on the system into account and predetermines the available user set from which it can choose service users. With comprehensive considerations to effect of interference signal and useful signal on system, Algorithm 3 set a weighting function as the objective function of user selection. Simulation results demonstrated that all three proposed algorithms could achieve user diversity gain while lowering cross-tier interference.

关键词： user selection cross-tier interference chordal distance channel norm heterogeneous network

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Provably Secure APK Redevelopment Authorization Scheme in the Standard Model

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Computers, Materials & Continua 2018年第9期56卷 447-465页

作者： Daofeng Li Mingxing Luo Bowen Zhao Xiangdong che School of Computer Electrical and informationGuang Xi UniversityNanning530004China Information Security and National Computing Grid Laboratory Southwest Jiaotong UniversityChengdu610031China Guangxi Colleges and Universities Key Laboratory of Multimedia Communications and Information Processing Guangxi UniversityNanning530004China School of Information Security&Applied Computing College of TechnologyEastern Michigan UniversityMichigan48197USA

The secure issues of APK are very important in Android *** order to solve potential secure problems and copyrights issues in redevelopment of APK files,in this paper we propose a new APK redevelopment mechanism(APK-SAN).By exploring sanitizable signature technology,APK-SAN allows the original developer to authorize specified modifier who can redevelop the designated source code of APK *** scheme does not require interactions between the developer and *** can reduce the communication overhead and computational overhead for ***,the signature of redeveloped APK files is valid and maintains the *** proposed APK-SAN signature can effectively protect the security of the redeveloped APK files and copyrights of the developer and modifier.

关键词： Sanitizable signature APK signature mechanism redevelopment ID-based signature scheme

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Synthesis and Crystal Structure of a Three-dimensional (3D) Complex Mn(H_2O)_2(HNic)_2 (HNic=2-Hydroxynicotinic Acid)

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Chinese Journal of Structural chemistry 2006年第5期25卷 572-576页

作者： LI Yu-Mei che Yun-Xia ZHeNG Ji-Min Department of chemistry Nankai University Tianjin 300071 China

The title complex Mn（H2O）2（HNic）2 （C22H12MnN2O8, Mr = 367.18） crystallizes in monoclinic, space group P21/c with a = 7.5735（8）, b = 12.5295（13）, c = 7.6466（8）A.β = 101.2790（10）°, Z = 2, V= 711.59（13） A^3, D, = 1.714 g/cm^3,μ（MoKa） = 0.974 mm^-1, F（000） = 374, R1 （1255 observed reflections （Ⅰ 〉 2σ（Ⅰ）） = 0.0250） and wR2 = 0.0662 （all data）. In this paper, we report the complexation of Mn（Ⅱ） by the bidentate ligand 2-hydroxynicotinic acid （HNic）. In the crystal the Mn（Ⅱ） ion exhibits a deformed octahedron structure. The title complex Mn（H2O）2（HNic）2 has a three-dimensional （3D） network structure extended by hydrogen bonds, which are formed by two typical eight-membered hydrogen-bonded rings.

关键词： complex crystal structure three-dimensional network

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electrocatalytic reduction of CO_(2) on chiral Cu surfaces

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Chinese Journal of Structural chemistry 2023年第8期42卷 1-3页

作者： Yuxi Fang Lu Han Shunai che School of chemistry and chemical engineering Frontiers Science Center for Transformative MoleculesState Key Laboratory of Metal Matrix CompositesShanghai KeyLaboratory for Molecular Engineering of Chiral DrugsShanghai Jiao Tong University800 Dongchuan RoadShanghai200240China School of chemical Science and engineering Tongji University1239 Siping RoadShanghai200092China

Carbon dioxide reduction products ranging from small molecules tobiomolecules are highly diverse in natural *** of carbon dioxide to produce a variety of products is one of themost efficient methods to understand *** applications of CO_(2)electro-reduction products in the transportation industry include theproduction of synthetic fuels,such as methanol and ethanol,which canbe used as alternatives to fossil ***,CO_(2)electro-reductionproducts can be used to produce chemicals and materials used in manyareas in industry,such as plastics and lubricants[1].

关键词： dioxide catalytic chiral

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experimental test of an extension of the Rosenzweig-Porter model to mixed integrable-chaotic systems experiencing time-reversal invariance violation

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Chinese Physics B 2024年第12期33卷 203-213页

作者： Xiaodong Zhang Jiongning che Barbara Dietz Lanzhou Center for Theoretical Physics Key Laboratory of Theoretical Physics of Gansu Provinceand Key Laboratory of Quantum Theory and Applications of the Ministry of EducationLanzhou UniversityLanzhou 730000China Center for Theoretical Physics of Complex Systems Institute for Basic Science(IBS)Daejeon 34126Korea Yangtze Delta Region Institute University of Electronic Science and Technology of ChinaHuzhou 313001China Basic Science Program Korea University of Science and Technology(UST)Daejeon 34113Korea

We report on the theoretical and experimental investigations of the transition of a typical quantum system with mixed regular-integrable classical dynamics to one with violated time-reversal(T)*** measurements are performed with a flat superconducting microwave resonator with circular shape in which chaoticity is induced by using either long antennas or inserting two circular disks into the cavity,and by magnetizing a ferrite disk placed at its center,which leads to violation of T *** propose an extension of the Rosenzweig-Porter(RP)model,which interpolates between mixed regular-chaotic instead of integrable dynamics and fully chaotic dynamics with violated T-invariance,and derive a Wigner-surmise like analytical expression for the corresponding nearest-neighbor spacing *** propose a procedure involving this result and those for the RP model to determine the size of T-invariance violation and chaoticity and validate it employing the experimental eigenfrequency spectra.

关键词： wave chaos quantum chaos quantum billiards microwave billiards random matrix theory microwave experiments

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Structural stability and magnetism of metastable Ni-Pt intermetallic compounds studied by ab initio calculation

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Science China(Technological Sciences) 2009年第9期52卷 2681-2687页

作者： che XingLai LI JiaHao DAI Ye LIU BaiXin Advanced Materials Laboratory Department of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

The self-consistent electronic structure calculations were carried out with the accurate frozen-core full-potential projector augmented-wave method on 13 Ni-Pt intermetallic compounds of simple crystalline structures,i.e. A15,D019,D03 and L12 Ni3Pt and NiPt3,and α-NiAs,B1,B2,L2a,and L10 NiPt. The calculations reveal that the L12 Ni3Pt,L10 NiPt and L12 NiPt3 are energetically more stable than their respective competitive structures,indicating that the three structures may be formed in some appropriate conditions. The obtained results match well with the experimental observation or other theory predictions. It is found that there is hybridization between Ni 3d and Pt 5d states,which may significantly affect the structural stability and magnetism of metastable Ni-Pt intermetallic compounds.

关键词： ab initio study magnetism metastable phases

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Synthesis and Crystal Structure of Co(DMSO)_2(H_2O)_2(SCN)_2 with One-dimensional Hydrogen-bonded Structure (DMSO = Dimethylsulfoxide)

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Chinese Journal of Structural chemistry 2006年第6期25卷 643-646页

作者： WeI Rong-Min che Yun-Xia ZHeNG Ji-Min Departmentof Biology chemistry Tianjin Normal University Tianjin 300071 China

The title complex Co（DMSO）2（H2O）2（SCN）2 has been prepared and structurally characterized. It crystallizes in monoclinic, space group P21/n with a= 5.1981（9）, b = 11.944（2）, c = 12.646（2） A,β = 98.686（2）°, V = 776.2（2） A^3, C6H16CoN2O4S4, Mr = 367.38, Z = 2, De = 1.572 g/cm^3, F（000） = 378 and μ（MoKa） = 1.646 mm^-1. The structure was refined to R= 0.0232 and wR = 0.0645 for 1241 observed reflections with I 〉 2σ（I）. In the title complex, each Co（II） atom is octahedrally coordinated by four O atoms from two DMSO ligands and two water molecules as well as two N atoms from SCN^- ions. The title molecules are connected to each other through intermolecular hydrogen bonds to form a 1-D structure extended by eight-membered Co2O4H2 rings.

关键词： dimethylsulfoxide thiocyanate group supramolecule,complex intermolecular hydrogen bond

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Integral stormwater management master plan and design in an ecological community

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Journal of environmental Sciences 2014年第9期26卷 1818-1823页

作者： Wu che Yang Zhao Zheng Yang Junqi Li Man Shi Key Laboratory of Urban Stormwater System and Water environment Beijing University of Civil Engineering and ArchitectureMinistry of Education Beijing Yuren Rainwater eco-technology Co. Ltd. China Aviation Planning and Construction Development Co. Ltd.

Urban stormwater runoff nearly discharges directly into bodies of water through gray infrastructure in China, such as sewers, impermeable ditches, and pump stations. As urban flooding, water shortage, and other environment problems become serious, integrated water environment management is becoming increasingly complex and challenging. At more than 200 ha, the Oriental Sun City community is a large retirement community located in the eastern side of Beijing. During the beginning of its construction, the project faced a series of serious water environment crises such as eutrophication, flood risk, water shortage, and high maintenance costs. To address these issues, an integral storrnwater management master plan was developed based on the concept of low impact development （LID）. A large number of LID and green stormwater infrastructure （GSI） approaches were designed and applied in the community to replace traditional stormwater drainage systems completely. These approaches mainly included bioretention （which captured nearly 85th percentile volume of the annual runoff in the site, nearly 5.4 x 10^5 m3 annually）, swales （which functioned as a substitute for traditional stormwater pipes）, waterscapes, and stormwater wetlands. Finally, a stormwater system plan was proposed by integrating with the gray water system, landscape planning, an architectural master plan, and related consultations that supported the entire construction period. After more than 10 years of planning, designing, construction, and operation, Oriental Sun City has become one of the earliest modem large-scale LID communities in China. Moreover, the project not only addressed the crisis efficiently and effectively, but also yielded economic and ecological benefits.

关键词： ecological communityOriental Sun CityIntegral stormwater managementMaster planGreen stormwater infrastructureLow impact development

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GASPeRMeATION OFγ-Al2 O3 MODIFIeD MeSOPOROUSCeRAMIC MeMBRANe

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催化学报 1996年第5期17卷 442-446页

作者： Xu Zhongqiang che ShanghaiResearchInstituteofPetrochemicalTechnology ShanghaiResearchInstituteofPe

ＧＡＳＰＥＲＭＥＡＴＩＯＮＯＦγ┐Ａｌ２Ｏ３ＭＯＤＩＦＩＥＤＭＥＳＯＰＯＲＯＵＳＣＥＲＡＭＩＣＭＥＭＢＲＡＮＥＸｕＺｈｏｎｇｑｉａｎｇ，ＣｈｅｎＱｉｎｇｌｉｎｇ（ＳｈａｎｇｈａｉＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅｏｆ... 详细信息

ＧＡＳＰＥＲＭＥＡＴＩＯＮＯＦγ┐Ａｌ２Ｏ３ＭＯＤＩＦＩＥＤＭＥＳＯＰＯＲＯＵＳＣＥＲＡＭＩＣＭＥＭＢＲＡＮＥＸｕＺｈｏｎｇｑｉａｎｇ，ＣｈｅｎＱｉｎｇｌｉｎｇ（ＳｈａｎｇｈａｉＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅｏｆＰｅｔｒｏｃｈｅｍｉｃａｌＴｅｃｈ...

关键词：气体渗透氧化铌薄膜陶瓷分离

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