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面向RAFT共识的低能耗无线区块链分片算法

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电子科技大学学报 2024年第4期53卷 595-604页

作者：罗皓翔孙罡雷波电子科技大学光纤传感与通信教育部重点实验室成都611731 中国电信股份有限公司研究院北京102209

区块链系统由于共识协商需要多轮沟通,会消耗大量的能量。在一些无线网络中,节点电池容量有限,会迅速导致节点能量耗尽和脱机,从而影响共识性能。该文设计了一种面向RAFT共识的低能耗的分片算法,算法将无线区块链网络中的节点限制在基... 详细信息

区块链系统由于共识协商需要多轮沟通,会消耗大量的能量。在一些无线网络中,节点电池容量有限,会迅速导致节点能量耗尽和脱机,从而影响共识性能。该文设计了一种面向RAFT共识的低能耗的分片算法,算法将无线区块链网络中的节点限制在基于地理区域的分片上,从而避免节点参与全局共识。同时,还提出了一种分片后的能耗估算方法,简化了分片无线区块链网络的能量计算。在太赫兹和毫米波两个信号场景中得到的仿真结果均验证了该算法的有效性,能耗可降低98.36%,估算方法的最小误差仅为0.40%。

关键词：无线区块链网络 RAFT共识分片低能耗

Theoretical analysis and experiment of micromechanics and mechanics-optics coupling of distributed optic-fiber crack sensing

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中国科学：技术科学英文版 2011年第S1期54卷 185-191页

作者： LIU HaoWu 1,2.CHEN Jiang 2.sun Man 3 & DING Rui 2.1.{2. key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065,China 2.School of Water Resource Hydropower,Sichuan University,Chengdu 610065,China 3 School Electrical Engineering and Information,Sichuan University,Chengdu 610065,China Sichuan Univ State Key Lab Hydraul & Mt River Engn Chengdu 610065 Peoples R China Sichuan Univ Sch Water Resource Hydropower Chengdu 610065 Peoples R China Sichuan Univ Sch Elect Engn & Informat Chengdu 610065 Peoples R China

The micromechanical behaviors and mechanics-optics coupling effects of optic-fiber-concrete complex in the distributed optic-fiber sensing concrete-crack technology,which was used in health monitoring of Wu Gorge Bridge on Yangtze River and a large dam successfully,have been investigated.A micromechanical theoretical analysis method and micromechanical frictional contact bi-interface model,as well as a modified optical theoretical analysis method of the mechanics-optics coupling effects are presented.A series of verification experiments,including mechanical experiments and mechanics-optics coupling experiments,have been *** results of micromechanical theoretical analysis and the analysis of the modified theory of mechanics-optics coupling along with mechanical and optical experimental data are shown to be in close *** the micromechanical theory and the modified theory of mechanics-optics coupling with their analysis methods can not only enhance credibility of this novel distributed sensing technology but also provide a way to understand its sensing mechanism and optimize its technical details and system.

关键词： optic-fiber sensing mechanics-optics coupling micromechanics health monitoring concrete structure crack detection

In flight MTF monitoring and compensation for CCD camera on CBERS-02

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science China(Technological sciences) 2005年第S2期48卷 29-43页

作者： GU Xingfa1,2.3, LI Xiaoying1,2.4, MIN Xiangjun5, YU Tao1,2. sun Jijuan5, ZENG Yong1,2.4, XU Hua1,2.& GUO Ding2.6 1. state {2. Laboratory of Remote sensing science, Jointly Sponsored by the Institute of Remote sensing Applications of Chinese Academy of sciences and Beijing Normal University, Beijing 100101, China 2. The Center for National Spaceborne Demonstration, Beijing 100101, China 3. Institut National de la Recherche Agronomique, Climat Sol Environnement, 84914 Avignon, France 4. Graduate University of Chinese Academy of sciences, Beijing 100039, China 5. China Center for Resource Satellite Data and Application, Beijing 100830, China 6. University of Electronic science and Technology of China, Chengdu 610054, China state key Laboratory of Remote {2. science Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University 100101 Beijing China The Center for National Spaceborne Demonstration 100101 Beijing China Institut National de la Recherche Agronomique Climat Sol Environnement 84914 Avignon France Graduate University of Chinese Academy of sciences 100039 Beijing China China Center for Resource Satellite Data and Application 100830 Beijing China University of Electronic science and Technology of China 610054 Chengdu China

In this article, the approach of simulating ideal tarp scene was proposed to determine the MTF for CCD camera on CBERS-02. The MTF acquired from this technique was compared to those from some common methods. MTFs achieved from different approaches were employed to compensate the CCD images based on three restoration algorithms: the iterative method, the Wiener filter and the modified inverse filter (MIF). The two-dimensional MTF was established with the value at frequency 0.5 for 45° directional MTF as the value at its four corners. This article addressed the variations of the restored CCD images with different techniques of constructing two-dimensional MTF, restoring algorithms and determining the in-flight MTFs. Results showed images restored with the MTF determined from the technique of simulating ideal tarp scene represent the real scene best. And the restoration technique based on the MIF would produce better restored images than the other two techniques. This research also demonstrated that the two-dimensional MTF used for restoration should be interpolated under the control of the MTF for 45° axis, rather than by multiplying the cross-orbit MTF with along-orbit MTF.

关键词： CBERS-02 CCD MTF the technique of simulating ideal tarp scene.

Anisotropism of the Non-Smooth Surface of Butterfly Wing

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Journal of Bionic Engineering 2009年第1期6卷 71-76页

作者： gang sun~(1,2., Yan Fang~(1,2., Qian Cong~1, Lu-quan Ren~11. {2. Laboratory of Terrain-Machine Bionics Engineering (Ministry of Education, China), Jilin University,Changchun 13002., P. R. China2. School of Life science, Changchun Normal University, Changchun 130032. P. R. China [a]key Laboratory of Terrain-Machine Bionics Engineering (Ministry of Education China) Jilin University Changchun 130022 P. R. China [b]School of Life Science Changchun Normal University Changchun 130032 P. R. China

Twenty-nine species of butterflies were collected for observation and determination of the wing surfaces using a Scanning Electron Microscope(SEM).Butterfly wing surface displays structural anisotropism in micro-,submicro- and *** scales on butterfly wing surface arrange like overlapping roof *** are submicrometric vertical gibbosities,horizontal links,and nano-protuberances on the ***-incline-then-drip method and first-drip-then-incline method were used to measure the Sliding Angle(SA)of droplet on butterfly wing surface by an optical Contact Angle(CA)measuring system. Relatively smaller sliding angles indicate that the butterfly wing surface has fine self-cleaning *** different SAs in various directions indicate the anisotropic self-cleaning property of butterfly wing *** SAs on the butterfly wing surface without scales are remarkably larger than those with scales,which proves the crucial role of scales in determining the self-cleaning *** wing surface is a template for design and fabrication ofbiomimetic materials and self-cleaning *** work may offer insights into how to design directional self-cleaning coatings and anisotropic wetting surface.

关键词： micro-/nano-structure anisotropism self-cleaning super-hydrophobicity sliding angle

Improvement of a 3D radar backscattering model using matrix-doubling method

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science China Earth sciences 2010年第7期53卷 1029-1035页

作者： NI WenJian1,2. GUO ZhiFeng1 & sun GuoQing3 1 state {2. Laboratory of Remote sensing science, jointly sponsored by the Institute of Remote sensing Applications of Chinese Academy of sciences and Beijing Normal University, Beijing 100101, China 2.Graduate University of Chinese Academy of sciences, Beijing 100049, China 3 Department of Geography, University of Maryland, College Park, MD 2.042. USA 1. state key Laboratory of Remote {2. science jointly sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University Beijing 100101 China2. Graduate University of Chinese Academy of Sciences Beijing 100049 China3. Department of Geography University of Maryland College Park MD 27042 USA

Radiative transfer models have been widely used to simulate the radar backscattering from forested areas. A three-dimensional radar backscatter model of forest canopy developed in previous studies takes full account of spatial position of trees in a forest stand, and the interactions among crown, trunk and ground surface. The model predicted well for the co-polarized backscatter measurements, but underestimated the backscattering for cross-polarization, primarily because only the first-order scattering within tree crowns was considered in the model. The backscattering at cross-polarization depends strongly on multiple scatter- ing within tree crowns. To produce good estimations for cross-polarized component, the matrix-doubling method is employed here to compute multiple-scattering within the crown. The modified model is compared with the original model, and the field forest measurements and AIRSAR data are used for validation of the modified model. The cross-polarization backscattering is improved in different degrees for different crown structures and at different bands.

关键词： remote sensing forestry electromagnetic propagation radar backscattering model matrix-doubling

Initial COVID-19 severity influenced by SARS-CoV-2.specific T cells imprints T-cell memory and inversely affects reinfection

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Signal Transduction and Targeted Therapy 2024年第6期9卷 2791-2803页

作者： gang Yang Jinpeng Cao Jian Qin Xinyue Mei Shidong Deng Yingjiao Xia Jun Zhao Junxiang Wang Tao Luan Daxiang Chen Peiyu Huang Cheng Chen Xi sun Qi Luo Jie Su Yunhui Zhang Nanshan Zhong Zhongfang Wang The Affiliated Hospital of Kunming University of science and Technology.Department of Respiratory and Critical Care Medicine The First People’s Hospital of Yunnan provinceKunmingYunnanChina Guangzhou National Laboratory BiolandGuangzhouGuangdongChina state key Laboratory of Respiratory Disease&National Clinical Research Center for Respiratory Disease Guangzhou Institute of Respiratory Healththe First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou Medical UniversityGuangzhouChina

The immunoprotective components control COVID-19 disease severity,as well as long-term adaptive immunity maintenance and subsequent reinfection risk discrepancies across initial COVID-19 severity,remain ***,we longitudinally analyzed SARS-CoV-2.specific immune effectors during the acute infection and convalescent phases of 165 patients with COVID-19 categorized by *** found that early and robust SARS-CoV-2.specific CD4^(+)and CD8^(+)T cell responses ameliorate disease progression and shortened hospital stay,while delayed and attenuated virus-specific CD8^(+)T cell responses are prominent severe COVID-19 *** antiviral antibody generation rather than titer level associates with severe ***,initial COVID-19 severity imprints the long-term maintenance of SARS-CoV-2.specific adaptive immunity,demonstrating that severe convalescents exhibited more sustained virus-specific antibodies and memory T cell responses compared to mild/moderate ***,initial COVID-19 severity inversely correlates with SARS-CoV-2.reinfection ***,our study unravels the complicated interaction between temporal characteristics of virus-specific T cell responses and COVID-19 severity to guide future SARS-CoV-2.wave management.

关键词： severity immunity infection

Development of a Pt(Ⅱ) compound based on indocyanine green@human serum albumin nanoparticles:integrating phototherapy,chemotherapy and immunotherapy to overcome tumor cisplatin resistance

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Rare Metals 2024年第11期 6006-6022页

作者： Xue-Yu Man Ze-Wen sun Shan-He Li gang Xu Wen-Juan Li Zhen-Lei Zhang Hong Liang Feng Yang state key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources/key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China) School of Chemistry and Pharmaceutical SciencesCollaborative Innovation Center for Guangxi Ethnic MedicineGuangxi Normal University

Cisplatin resistance is the main cause for the failure of cancer *** solve the problem,we proposed to develop a novel human serum albumin(HSA)nanoplatform to integrate chemotherapy,photothermal therapy(PTT) and *** this end,we obtained a platinum compound(C5) with significant cytotoxicity in the cisplatin-resistant SKOV-3 cells(SKOV-3/DDP),and then innovatively constructed photosensitizer(indocyanine green(ICG))-encapsulated HSAC5 complex nanoparticles(ICG@HSA-C5 NPs).The ICG@HSA-C5 NPs exhibited excellent photothermal performances in vitro and in ***,the in vivo results revealed that HSA enhanced the antitumor effect of C5 and that the combination of chemotherapy and PTT could significantly inhibit cisplatin-resistant tumor growth and improved the targeting abilities of C5 and ICG,and reduced their side *** also confirmed that ICG@HSA-C5 NPs killed the SKOV-3/DDP cells via gasdermin E(GSDME)-mediated pyroptosis and pyroptosis-induced immune responses,thereby synergistically leading to the death of the SKOV-3/DDP cells.

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Apatite Fission Track Thermochronology of Granite from the Xiazhuang Uranium Ore Field,South China:Implications for Exhumation History and Ore Preservation

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Acta Geologica Sinica(English Edition) 2024年第2期98卷 430-440页

作者： sun Yue CHEN Zhengle PAN Jiayong HUO Hailong LI Haidong sun Junjie XU Guangchun state key Laboratory of Nuclear Resources and Environment School of Earth SciencesEast China University of TechnologyNanchang 330013China Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China No.2.0 Research Institute CNNCShaoguanGuangdong 512029China

Xiazhuang uranium ore field,located in the southern part of the Nanling Metallogenic Belt,is considered one of the largest granite-related U regions in South *** this paper,we contribute new apatite fission track data and thermal history modeling to constrain the exhumation history and evaluate preservation potential of the Xiazhuang Uranium ore *** Triassic outcrop granite samples collected from different locations of Xiazhuang Uranium ore field yield AFT ages ranging from 43 to 2. Ma with similar mean confined fission track lengths ranging from 11.8±2.0 to 12.9±1.9μm and Dpar values between 1.01 and 1.51μ*** robustness time-temperature reconstructions of samples from the hanging wall of Huangpi fault show that the Xiazhuang Uranium ore field experienced a time of monotonous and slow cooling starting from middle Paleocene to middle Miocene(~60-10 Ma),followed by relatively rapid exhumation in the late Miocene(~10-5 Ma)and nearly thermal stability in the Pliocene-Quaternary(~5-0 Ma).The amount of exhumation after U mineralization since the Middle Paleogene was estimated as~4.3±1.8 km according to the integrated thermal history *** studies indicate that the ore-forming ages of U deposits in the Xiazhuang ore field are mainly before Middle Paleocene and the mineralization depths are more than 4.4±1.2.***,the exhumation history since middle Paleocene plays important roles in the preservation of the Xiazhuang Uranium ore field.

关键词： apatite fission track exhumation history ore preservation Xiazhuang Uranium ore field South China

UDT:U-shaped deformable transformer for subarachnoid haemorrhage image segmentation

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CAAI Transactions on Intelligence Technology 2024年第3期9卷 756-768页

作者： Wei Xie Lianghao Jin Shiqi Hua Hao sun Bo sun Zhi{2. Tu Jun Liu Hubei Provincial key Laboratory of Artificial Intelligence and Smart Learning Central China Normal UniversityWuhanChina School of Computer science Central China Normal UniversityWuhanChina National Language Resources Monitoring and Research Center for Network Media Central China Normal UniversityWuhanChina The First Affiliated Hospital of Dalian Medical University DalianChina state key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhanChina Information Systems Technology and Design Pillar Singapore University of Technology and DesignSingaporeSingapore

Subarachnoid haemorrhage(SAH),mostly caused by the rupture of intracranial aneu-rysm,is a common disease with a high fatality *** lesions are generally diffusely distributed,showing a variety of scales with irregular *** complex characteristics of lesions make SAH segmentation a challenging *** cope with these difficulties,a u-shaped deformable transformer(UDT)is proposed for SAH ***,first,a multi-scale deformable attention(MSDA)module is exploited to model the diffuseness and scale-variant characteristics of SAH lesions,where the MSDA module can fuse features in different scales and adjust the attention field of each element dynamically to generate discriminative multi-scale ***,the cross deformable attention-based skip connection(CDASC)module is designed to model the irregular edge char-acteristic of SAH lesions,where the CDASC module can utilise the spatial details from encoder features to refine the spatial information of decoder ***,the MSDA and CDASC modules are embedded into the backbone Res-UNet to construct the proposed *** experiments are conducted on the self-built SAH-CT dataset and two public medical datasets(GlaS and MoNuSeg).Experimental results show that the presented UDT achieves the state-of-the-art performance.

关键词： image segmentation medical image processing