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A(t, m, n)-Group Oriented Secret Sharing Scheme

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Chinese Journal of Electronics 2016年第1期25卷 174-178页

作者： MIAO Fuyou fan yuanyuan WANG Xingfu XIONG Yan Moaman Badawy School of Computer Science and Technology University of Science and Technology of China

Basic(t, n)-Secret sharing(SS) schemes share a secret among n shareholders by allocating each a share. The secret can be reconstructed only if at least t shares are available. An adversary without a valid share may obtain the secret when more than t shareholders participate in the secret reconstruction. To address this problem, the paper introduces the notion and gives the formal definition of(t, m, n)-Group oriented secret sharing(GOSS); and proposes a(t, m, n)-GOSS scheme based on Chinese remainder theorem. Without any share verification or user authentication, the scheme uses Randomized components(RC) to bind all participants into a tightly coupled group, and ensures that the secret can be recovered only if all m(m ≥ t) participants in the group have valid shares and release valid RCs honestly. Analysis shows that the proposed scheme can guarantee the security of the secret even though up to m-1 RCs or t-1 shares are available for adversaries. Our scheme does not depend on any assumption of hard problems or one way functions.

关键词： Threshold secret sharing Group oriented Randomized components Share protection Chinese remainder theorem

Room temperature phosphorescence achieved by aromatic/perfluoroaromatic interactions

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Science China Chemistry 2022年第5期65卷 918-925页

作者： Qunhua Zhang yuanyuan fan Qiuyan Liao Cheng Zhong Qianqian Li Zhen Li Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials Sauvage Center for Molecular SciencesDepartment of ChemistryWuhan UniversityWuhan 430072China Institute of Molecular Aggregation Science Tianjin UniversityTianjin 300072China

Room temperature phosphorescence(RTP) has attracted much attention for the applications in information encryption,bioimaging,displaying,and so *** this work,persistent RTP emission is mainly achieved by the compact face-to-face packing modes with aromatic/perfluoroaromatic ***,it can be further optimized by halogen substitutions with heavy atom effect,electron-withdrawing property,and steric hindrance,resulting in the prolonged RTP ***,the multiple fluorine substitutions endowed these luminogens with the water-resistant property,resulting in the maintained RTP emission with water ***,the aromatic/perfluoroaromatic interactions are not only the efficient approach to achieve persistent RTP,but also extend their application to a humid environment or even in water.

关键词： room temperature phosphorescence aromatic/perfluoroaromatic interaction face-to-face packing

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Responsive Dual-Targeting Exosome as a Drug Carrier for Combination Cancer Immunotherapy

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Research 2021年第1期2021卷 1433-1444页

作者： yuanyuan fan Yingshun Zhou Meng Lu Haibin Si Lu Li Bo Tang College of Chemistry Chemical Engineering and Materials ScienceCollaborative Innovation Center of Functionalized Probes for Chemical ImagingKey Laboratory of Molecular and Nano ProbesMinistry of EducationShandong Normal UniversityJinan 250014China

Recently,combination immunotherapy,which incorporates the activation of the immune system and inhibition of immune escape,has been proved to be a new powerful strategy for more efficient tumor suppression compared to ***,the major challenge is how to integrate multiple immune drugs together and efficiently convey these drugs to tumor *** a variety of nanomaterials have been exploited as carriers for targeting tumor issues and the delivery of multiple drugs,their potential toxicity,immune rejection,and stability are still controversial for clinical ***,we proposed endogenic exosomes as drug carriers to deliver two antibodies acting as tumor-targeting molecules and block checkpoint inhibitors with specific response to the tumor microenvironment and costimulatory molecules for further improvement of therapeutic *** versatile exosomes exhibit excellent biocompatibility and provide a combination immunotherapy platform with synergistic advantages of activation of immune response and inhibition of immune escape.

关键词： drugs versatile Dual

Thermal conductivity of diamond/copper composites with a bimodal distribution of diamond particle sizes prepared by pressure infiltration method

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Rare Metals 2011年第4期30卷 408-413页

作者： CHEN Chao GUO Hong CHU Ke YIN Fazhang ZHANG Ximing HAN yuanyuan fan Yeming The General Research Institute of Nonferrous Metals Beijing Beijing 100088 China

The thermal conductivity of diamond/copper composites with bimodal particle sizes was studied. The composites were prepared through pressure infiltration of liquid copper into diamond preforms with a mixture of 40 and 100 pm-size diamonds. The permeability of the preforms with different coarse-to-fine volume ratios of diamonds was investigated. The thermal conductivity of the diamond/copper composites with bimodal size distribution was compared to the theoretical value derived from an analytical model developed by Chu. It is predicted that the diamond/copper composites could reach a higher thermal conductivity and their surface roughness could be improved by applying bimodal diamond particle sizes.

关键词： metallic matrix composites thermal conductivity diamonds copper size distribution pressure infiltration

Measurements and Characterization for the Vehicle-to-Infrastructure Channel in Urban and Highway Scenarios at 5.92GHz

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China Communications 2022年第4期19卷 28-43页

作者： yuanyuan fan Yi Feng Liu Liu Shuoshuo Dong Zhaoyang Su Jiahui Qiu Xiaobo Lin School of Electronic and Information Engineering Beijing Jiaotong UniversityBeijing 100044China China United Network Communications Group Co. Ltd.Beijing 100033China

In the future smart transportation system, reliable vehicle-to-infrastructure(V2 I) communication is very important to ensure vehicle driving safety and to improve vehicle driving efficiency. In this paper, V2 I channel measurements at 5.92 GHz are conducted in typical urban and highway *** frequency and bandwidth of transmission, as well as the deployment of the RSU(roadside unit) and the OBU(on board unit), are selected by considering the recommendation proposed by 3 GPP TR 36.885. Then,based on the measured data, the key channel characteristic parameters of the V2 I channel are extracted,including path loss, root-mean-square delay spread,stationarity distance, and Doppler spread, etc. Also,the statistical characteristics of the parameters, including time-varying and Doppler characteristics, are investigated and characterized. The work in this paper helps researchers design technology and communication systems in similar scenarios.

关键词： vehicle-to-infrastructure channel characterization measurement urban scenario highway scenario

Dual interfacial engineering for efficient Cs_(2)AgBiBr_(6) based solar cells

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Journal of Energy Chemistry 2021年第2期30卷 372-378,I0013页

作者： Tao Luo Yalan Zhang Xiaoming Chang Junjie fang Tianqi Niu Jing Lu yuanyuan fan Zicheng Ding Kui Zhao Shengzhong(Frank)Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an 7J0119ShaanxiChina Dalian National Laboratory for Clean Energy iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

The emerging lead-free halide double perovskite solar cells have attracted widespread attentions due to their long-term stability and non-toxicity, but suffer from the low device performance. One efficiencylimiting factor is the improper contacts between the halide double perovskite and anode/cathode electrodes. Here, we improve the efficiency and stability of the bismuth-halide double perovskite based solar cells by a synergistic interface design for both electron and hole transport layers(ETL/HTL). The results show that the modification of the TiO_2 ETL with a thin hydrophobic C60 layer and replacement of the lithium-doped small molecule HTL with an un-doped conjugated polymer lead to higher surface quality of perovskite film and better energy-level alignment at the contacts. As a result, the optimized device shows reduced trap density, suppressed charge recombination and enhanced charge extraction, leading to an increase of 69% in device efficiency. In addition, the device also exhibits superior stability in ambient environment, heat stress and light bias after interface optimization. This work provides an efficient strategy for the device optimization of the emerging lead-free perovskite solar cells.

关键词： Perovskite solar cells Double perovskites Synergistic interfacial engineering Efficiency and stability

Chemical and spectroscopic characteristics of humic acid from a clay loam soil in Ontario after 52 years of consistent fertilization and crop rotation

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Pedosphere 2021年第1期31卷 204-213页

作者： Nan ZHAO Xixiang YANG Guocheng HUANG Yizhong LU Jing ZHANG yuanyuan fan Craig F.DRURYS Xueming YANG School of Envionmental Science and Enginering.Suen Nat sen Lniversity Gnongzhow 510275China School of Chemistry Guangzhou Key Labovatory of Analytical Chemistry fo BiomedicineSouth China Normal UniversityGuangshou 510006China College of Resources and Environmental Sciences China Agricnltural UniversityBejing 100193China Key Latborafory of Enwinomental Namo Technologr and Heath Eect.Research Cemter for Ecr Ewinxumertad Sciences Chimese Academy of Sciences.Berjing 100085China Harroge Re searh and Devebopmenr Cenre Agrienilure and Agri Fod CanadaHarmOnario NOR IG0Camada

Long-term fertilization and crop rotation can influence both organic C sequestration as well as the C composition of soils and the more resistant organic C compounds contained in humic acid(HA). This study examined the effects of fertilization and cropping type(monoculture corn(MC) and Kentucky bluegrass sod(KBS) and corn-oat-alfalfa-alfalfa rotation(RC)) on the HA composition of soil from a 52-year field study in southern Ontario, Canada. Humic acid samples were extracted from soil, and elemental analysis, infrared spectroscopy, solid state 13C nuclear magnetic resonance spectra, and electron paramagnetic resonance methods were used to determine the influence of the cropping type on the characteristics of HA. Both fertilization and cropping type affected the chemical characteristics of HA. Fertilization led to a 5.9% increase in C, a 7.6% decrease in O, and lower O/C and(N + O)/C ratios in HA as compared to the corresponding non-fertilized treatments. Rotation resulted in a lower proportion of C(48.1%) and a greater(N + O)/C ratio(0.7) relative to monoculture cropping. Infrared spectroscopy analysis showed that HA contained more C-O groups in fertilized soil than in non-fertilized soil under MC and KBS. Fertilization increased the O-alkyl-C, phenolic-C, and free radical contents of HA relative to non-fertilization treatments. Rotation decreased the aliphatic and carboxyl groups and increased the O-alkyl, carbohydrate, aryl, and phenolic groups and free radicals, relative to MC and KBS. Both long-term crop rotation and fertilization dramatically modified the soil HA composition. Significant relationships were observed between the molecular composition of HA and soil organic C. Hence, humic acid characterization could be used as an indicator of the long-term sustainability of crop management practices.

关键词： corn humification process infrared spectroscopy Kentucky bluegrass sod molecular composition soil organic C

How temperature and hydrostatic pressure impact organic room temperature phosphorescence from H-aggregation of planar triarylboranes and the application in bioimaging

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Science China Chemistry 2023年第3期66卷 816-825页

作者： Liangjing Tu yuanyuan fan Changjiang Bi Leyi Xiao Yonggang Li Aisen Li Weilong Che Yujun Xie Yufeng Zhang Shuping Xu Weiqing Xu Qianqian Li Zhen Li Institute of Molecular Aggregation Science Tianjin UniversityTianjin 300072 China Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials Department of ChemistryWuhan UniversityWuhan 430072China State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China School and Hospital of Stomatology Wuhan UniversityWuhan 430079China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New CityFuzhou 350027China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Tianjin UniversityTianjin 300072China

Highly efficient persistent organic room temperature phosphorescence(RTP) has attracted increasing attention because of promising applications in fields of chemical sensors, optoelectronic devices, information security, and bioimaging, etc. Wherein,the crystal engineering of H-aggregation offers stabilization for long-lived triplet exciton for RTP, but the related research is rare because of the scarcity of ideal phosphorescent H-aggregate. Herein, we designed planar tricoordinate organoboron derivatives with molecular arrangement in ideal H-aggregation. The integration of Br atom can largely enhance RTP efficiency through increasing SOC effect, while the antiparallel molecular arrangement causes annihilation of triplet exciton. Thanks to good selfassembly property, their RTP can even be observed in PMMA matrix with doping ratio of merely 1 wt%. We further found that the cryogenic temperature contributes to stabilizing triplet exciton in H-aggregation, leading to red-shifted phosphorescence. By applying high hydrostatic pressure, the phosphorescence was largely enhanced and redshifted, demonstrating the crucial role of H-aggregation on RTP property. In phosphorescent tissue imaging of live mouse, nanoparticles of BrBA exhibited high contrast image via eliminating the interference of autofluorescence.

关键词： room temperature phosphorescence H-aggregation planar triarylboranes bioimaging

The Research Framework Model of Rapid Assessment and Emergency Plan Selection for Urban Flood Disaster

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World Journal of Engineering and Technology 2017年第3期5卷 103-108页

作者： Junai Yan yuanyuan fan Shuwei Jing School of Management Science and Engineering Shanxi University of Finance & Economics Taiyuan China

Given that it is difficult to assess the harmfulness and make emergency response timely in the early stage when flood disasters happen in cities for that the data are complex and rapidly changing, this article constructs a rapid assessment model, namely Simple Simos Procedure and PROMTHEE II Model (SSPPM), to assess the severity of flood disaster occurring in cities at the early stage based on a view of the rapid flood disaster assessment. On this basis, the fuzzy VIKOR method is applied to choose a scientific emergency plan. This article aims to construct a research framework model, which can provide some practice implications to reduce the losses caused by flood disaster.

关键词： Flood Disaster Rapid Assessment Emergency Plan