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| 1 | Mechanism of chain propagation for the synthesis of polyoxymethylene dimethyl ethers显示文摘Polyoxymethylene dimethyl ethers(PODE)were synthesized from the reaction of paraformaldehyde with dimethoxymethane(DMM)over different acid catalysts at different conditions.Products were found to follow the Schulz-Flory distribution law.The chain propagation proceeds through the insertion of an individual segment of CH2O one by one,while the simultaneous insertion of a few CH2O segments or their assembly is unlikely.Due to the restriction of this law,it is difficult to increase the selectivity to the desired products(e.g.,PODE3 4). | Yupei Zhao Zheng Xu Hui Chen Yuchuan Fu Jianyi Shen | 2013 | Journal of Energy Chemistry2013，22，6： | 36 |
| 2 | Enable Data Dynamics for Algebraic Signatures Based Remote Data Possession Checking in the Cloud Storage显示文摘Cloud storage is one of the main application of the cloud computing.With the data services in the cloud,users is able to outsource their data to the cloud,access and share their outsourced data from the cloud server anywhere and anytime.However,this new paradigm of data outsourcing services also introduces new security challenges,among which is how to ensure the integrity of the outsourced data.Although the cloud storage providers commit a reliable and secure environment to users,the integrity of data can still be damaged owing to the carelessness of humans and failures of hardwares/softwares or the attacks from external adversaries.Therefore,it is of great importance for users to audit the integrity of their data outsourced to the cloud.In this paper,we first design an auditing framework for cloud storage and proposed an algebraic signature based remote data possession checking protocol,which allows a third-party to auditing the integrity of the outsourced data on behalf of the users and supports unlimited number of verifications.Then we extends our auditing protocol to support data dynamic operations,including data update,data insertion and data deletion.The analysis and experiment results demonstrate that our proposed schemes are secure and efficient. | LUO Yuchuan FU Shaojing XU Ming WANG Dongsheng | 2014 | China Communications2014，11，11： | 4 |
| 3 | Investigation on the combustion characteristics of a diesel engine fueled with diesel–azides blends显示文摘 | Geng Fu Changlu Zhao Bolan Liu Fujun Zhang Siping Pang Yuchuan Li | 2011 | Applied Energy2011，，1： | 2 |
| 4 | Cluster-Based Content Download and Forwarding Scheme for Highway VANETs显示文摘The recent advances in wireless communication technology enable high-speed vehicles to download data from roadside units(RSUs). However, the data download volume of individual vehicle is rather restricted due to high mobility and limited transmission range of vehicles, bringing users poor performance. To address this issue, we exploit the combination of both clustering and carry-and-forward schemes in this paper. Our scheme coordinates the cooperation of multiple infrastructures, cluster formation in the same direction and data forwarding of reverse vehicles to facilitate the target vehicle to download large-size content in dark areas. The process of data dissemination and achievable data download volume are then derived and analyzed theoretically. Finally, we conduct extensive simulations to verify the performance of the proposed scheme. Results show significant benefits of the proposed scheme in terms of increasing data download volume and throughput. | mingsi zhang changle li tao guo yuchuan fu | 2018 | China Communications2018，15，4： | 2 |
| 5 | 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 |
| 6 | Thermal decomposition of dimethoxymethane and dimethyl carbonate catalyzed by solid acids and bases 显示文摘 | Fu Yuchuan Zhu Haiyan Shen Jianyi | 2005 | Thermochimica Acta2005，434，12： | 1 |
| 7 | Thermal Decomposition of Dimethoxymethane and Dimethyl Carbonate Catalyzed by SolidAcids and Bases显示文摘 | Fu Yuchuan Zhu Haiyan Shen Jianyi | | 0，，1： | 1 |
| 8 | TiO 2 nanotubes supported V 2 O 5 for the selective oxidation of methanol to dimethoxymethane显示文摘 | Jingwei Liu Yuchuan Fu Qing Sun Jianyi Shen | 2008 | Microporous and Mesoporous Materials2008，，1： | 1 |
| 9 | INTERFACIAL ACTIVITY BEHEAVIOR OF FLUX DURING ALUMINIUM BRAZING显示文摘A study on the interfacial activity behavior of flux during aluminium brazing has been madeby using metallography,SEM and electron prob techniques.The results show that the activity,of a flux is caused by the wetting of base metal with the liquid heavy metal reduced from theflux,thus,some regions of liquid alloy created,at which no aluminium oxide film covers on thesurfaces.The reduced metal drops are finally trapped in the fillet.The size of the metal dropsincreases with the decrease of brazing temperature. | ZHANG Qiyun LIU Shuqi LAN Tie FU Yuchuan Peking University,Beijing,China ZHANG Qiyun,Professor,Department of Chemistry,Peking University,Beijing,China | 1990 | Acta Metallurgica Sinica(English Letters)1990，3，7： | 1 |
| 10 | Thermal decomposition of dimethoxymethane and dimethyl carbonate catalyzed by solid acids and bases 显示文摘 | Fu Yuchuan Zhu Haiyan Shen Jianyi | 2005 | Thermochimiea Acta2005，434，12： | 1 |
| 11 | Thermal decomposition of dimethoxymethane and dimethyl carbonate catalyzed by solid acids and bases显示文摘 | Fu Yuchuan Zhu Haiyan Shen Jianyi | 2005 | Thermochimica Acta2005，434，12： | 1 |
| 12 | Thermaldecomposition of dimethoxymethane and dimethylcarbonate catalyzed by solid acids and bases 显示文摘 | FU Yuchuan ZHU Haiyan SHEN Jianyi | 2005 | Thermochimica Acta2005，434，1： | 1 |
| 13 | Structur- al, acidic and redox properties of V2Os-TiO2-SO42- catalysts 显示文摘 | Sun Qing Fu Yuchuan Liu Jingwei | 2008 | Applied Catalysis A : General2008，334，12： | 1 |
| 14 | Cooperative Content Caching and Delivery in Vehicular Networks: A Deep Neural Network Approach显示文摘The growing demand for low delay vehicular content has put tremendous strain on the backbone network.As a promising alternative,cooperative content caching among different cache nodes can reduce content access delay.However,heterogeneous cache nodes have different communication modes and limited caching capacities.In addition,the high mobility of vehicles renders the more complicated caching environment.Therefore,performing efficient cooperative caching becomes a key issue.In this paper,we propose a cross-tier cooperative caching architecture for all contents,which allows the distributed cache nodes to cooperate.Then,we devise the communication link and content caching model to facilitate timely content delivery.Aiming at minimizing transmission delay and cache cost,an optimization problem is formulated.Furthermore,we use a multi-agent deep reinforcement learning(MADRL)approach to model the decision-making process for caching among heterogeneous cache nodes,where each agent interacts with the environment collectively,receives observations yet a common reward,and learns its own optimal policy.Extensive simulations validate that the MADRL approach can enhance hit ratio while reducing transmission delay and cache cost. | Xuelian Cai Jing Zheng Yuchuan Fu Yao Zhang Weigang Wu | 2023 | China Communications2023，20，3： | 0 |
| 15 | Observing eddy dye patches induced by shear instabilities in the surf zone on a plane beach显示文摘The effects of surf zone eddy generated by alongshore currents on the deformation and transport of dye are still poorly understood,and related tracer release experiments are lacking.Therefore,a tracer release laboratory experiment was conducted under monochromatic,unidirectional incident waves with a large incident angle(30°)on a plane beach with a 1:100 slope in a large wave basin.A charge-coupled device suspended above the basin recorded the dye patch image.The evolution of eddy dye patch was observed and the transport and diffusion were analyzed based on the collected images.Subsequently,a linear instability numerical model was adopted to calculate the perturbation velocity field at the initial stage.The observation and image processing results show that surf zone eddy patches occurred and were separated from the original dye patches.Our numerical analysis results demonstrate that the structure of the perturbation velocity field is consistent with the experimental observations,and that the ejection of eddy patches shoreward or offshore may be ascribed to the double vortex. | Chunping Ren Nannan Fu Chong Yu Yuchuan Bai Kezhao Fang | 2024 | Acta Oceanologica Sinica2024，43，3： | 0 |
| 16 | IoV and Blockchain-Enabled Driving Guidance Strategy in Complex Traffic Environment显示文摘Diversified traffic participants and complex traffic environment(e.g.,roadblocks or road damage exist)challenge the decision-making accuracy of a single connected and autonomous vehicle(CAV)due to its limited sensing and computing capabilities.Using Internet of Vehicles(IoV)to share driving rules between CAVs can break limitations of a single CAV,but at the same time may cause privacy and safety issues.To tackle this problem,this paper proposes to combine IoV and blockchain technologies to form an efficient and accurate autonomous guidance strategy.Specifically,we first use reinforcement learning for driving decision learning,and give the corresponding driving rule extraction method.Then,an architecture combining IoV and blockchain is designed to ensure secure driving rule sharing.Finally,the shared rules will form an effective autonomous driving guidance strategy through driving rules selection and action selection.Extensive simulation proves that the proposed strategy performs well in complex traffic environment,mainly in terms of accuracy,safety,and robustness. | Yuchuan Fu Changle Li Tom H.Luan Yao Zhang | 2023 | China Communications2023，20，12： | 0 |
| 17 | Sulfonated carbon materials with hydrophilic and lipophilic properties显示文摘Two acidic carbon materials(H-PRC and HS-C) were used as catalysts for the condensation reaction of methanol with formaldehyde to produce dimethoxymethane(DMM) in aqueous solution(hydrophilic system) and for the etherification of isopentene with methanol to produce tert amyl methyl ether(TAME) in toluene solution(lipophilic system). Microcalorimetric adsorptions of water and benzene showed that the HS-C was highly hydrophilic without the lipophilicity, while the H-PRC exhibited both the hydrophilicity and lipophilicity. Thus, the HS-C was well dispersed in aqueous solution and difficult to separate from it. On the other hand, the H-PRC was highly active, more active than the acidic resin(D008) and sulfuric acid, for the synthesis of DMM in aqueous solution. The H-PRC was also highly active, more active than the HS-C,for the etherification of isopentene with methanol to produce TAME in toluene solution, probably owing to its amphiphilic surface property as well as its strong surface acidity as measured by the microcalorimetric adsorption of NH3. | Yupei Zhao Hui Chen Yu'an Huang Yu Zhao Yuchuan Fu Jianyi Shen | 2014 | Journal of Energy Chemistry2014，23，2： | 0 |
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