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Practical Considerations and Limitations of Using Leaf and Canopy Temperature Measurements as a Stomatal Conductance proxy:Sensitivity across Environmental Conditions,Scale,and Sample Size

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Plant Phenomics 2024年第2期6卷 416-432页

作者： Ismael K.Mayanja Christine H.Diepenbrock Vincent Vadez Tong Lei Brian N.Bailey Department of Biological Systems Engineering University of CaliforniaDavisDavisCAUSA Department of Plant Sciences University of CaliforniaDavisDavisCAUSA French National Research Institute for Sustainable Development(IRD) UMR DIADEUniversity of MontpellierMontpellierFrance

Stomatal conductance(gs)is a crucial component of plant physiology,as it links plant productivity and water loss through *** gs indirectly through leaf temperature(Tl)measurement is common for reducing the high labor cost associated with direct gs ***,the relationship between observed Tl and gs can be notably affected by local environmental conditions,canopy structure,measurement scale,sample size,and gs itself.

关键词： environmental temperature conditions canopy sample proxy scale leaf across conductance

Certificateless designated verifier proxy signature scheme for unmanned aerial vehicle networks

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Science China(Information Sciences) 2021年第1期64卷 79-93页

作者： Lei HE Jianfeng MA Limin SHEN Dawei WEI School of Computer Science and Technology Xidian University School of Computer and Communication Engineering Zhengzhou University of Light Industry School of Cyber Engineering Xidian University School of Computer Science and Technology Nanjing Normal University

Unmanned aerial vehicle(UAV) technologies have a promising application prospect. It is necessary to use digital signature schemes to protect the integrity and authentication of messages in the UAV networks. According to the characteristics of UAV networks, digital signature schemes should solve the problems of digital certificate management and key escrow, guarantee the real-time performance of UAV executing commands, and ensure that only the designated verifier can verify the signature. Therefore, we proposed a certificateless designated verifier proxy signature(CLDVPS) scheme which meets the requirements. We proved our signature scheme is existentially unforgeable under an adaptive chosen message attack in the random oracle model and compared the efficiency of our signature scheme with other signature *** implemented these signature schemes in jPBC to obtain the computing time and theoretically analyzed signature length of these signature schemes. The analysis results indicate that our CLDVPS scheme is more efficient than most of other related signature schemes on computation costs and also efficient on communication costs.

关键词： certificateless designated verifier proxy digital signature unmanned aerial vehicle

Threshold proxy quantum signature scheme with threshold shared verification

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Science China(Physics,Mechanics & Astronomy) 2008年第8期51卷 1079-1088页

作者： YANG YuGuang1,3,4 & WEN QiaoYan2 1 College of Computer Science and Technology,Beijing University of Technology,Beijing 100124,China 2 State Key Laboratory of Networking and Switching Technology,Beijing University of Posts and Tele-communications,Beijing 100876,China 3 State Key Laboratory of Integrated Services Network,Xidian University,Xi’an 710071,China 4 State Key Laboratory of Information Security(Graduate University of Chinese Academy of Sciences) ,Beijing 100049,China College of Computer Science and Technology Beijing University of Technology Beijing China State Key Laboratory of Integrated Services Network Xidian University Xi’an China State Key Laboratory of Information Security (Graduate University of Chinese Academy of Sciences) Beijing China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China

A threshold proxy quantum signature scheme with threshold shared verification is proposed. An original signer could authorize a group as its proxy signers. Then only t or more of n persons in the proxy group can generate the proxy signature on behalf of the original signer and any t-1 or fewer ones cannot do that. When the proxy signature needs to be verified,any t or more of n persons belonging to the verification group can verify the message and any t-1 or fewer ones cannot verify the validity of the proxy signature.

关键词： quantum signature threshold proxy quantum group signature threshold shared verification

Modeling TCP performance with proxy and ARQ

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第2期7卷 164-171页

作者：金彦亮杨宇航 Modern Communication Institute Shanghai Jiao Tong University Shanghai 200030 China

TCP/IP is a next generation key technology in the wireless communication network where the different characteristics of wireless and wired links result in performance degradation. We can use the proxy and automatic repeat request (ARQ) schemes to deal with this problem. In this work, we investigate the TCP performance over proxy and ARQ in the wireless network. Our analysis results showed that using the proxy can result in lower transfer latency and higher throughput and that ARQ can decrease the loss rate of wireless link and improve the performance with little additional latency. The analytical results were validated against simulations using the NS-2 with some more realistic parameters.

关键词： TCP performance Wireless communication proxy ARQ

Cycladophora davisiana(Radiolarian)in the Bering Sea during the late Quaternary:A stratigraphic tool and proxy of the glacial Subarctic Pacific Intermediate Water

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Science China Earth Sciences 2005年第10期48卷 1698-1707页

作者： WANG Rujian1 & CHEN Ronghua2 1. State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China 2. The Key Laboratory of Submarine Geoscience, State Oceanic Administration, Hangzhou 310012, China Tongji University State Oceanic Administration

Cycladophora davisiana (Radiolarian) contents are counted in two cores of the Ber-ing Sea and correlated well with the oxygen isotopic records of ice in the deep core obtained by the Greenland Ice Sheet Project II (GISP 2) and deep-sea sediments (SPECMAP) of the world oceans. Millennial scale climatic events, for example, Younge Dryas and B?lling/Aller?d events, Heinrich1 and Dansgaard-Oeschger1events, recorded by C. davisiana percents are distin-guished from Core B4-2. C. davisiana events b, c1, c2, d, e1 and e2, respectively, corresponding to oxygen isotopic 2.0, 3.1, 3.3, 4.0, 5.1 and 5.3, are identified from Core B2-9. High resolution re-cords of C. davisian are tuned to the oxygen isotopic records in GISP 2 and SPECMAP and the depth-age frameworks are established in the two cores, supplying a stratigraphic base for future paleoceanographic and paleoclimatic studies. High C. davisiana during the glacial periods in the two cores indicate that they can serve as a proxy of the glacial Subarctic Pacific Intermediate Water, which verifies the glacial Subarctic Pacific Intermediate Water brought from the Bering Sea.

关键词： Cycladophora davisiana, stratigraphic tool, YD and B/A events, Heinrich 1 and D/O1 events, proxy of glacial Subarctic Pacific Intermediate Water, late Quaternary, Bering Sea.

Design and Implementation of a proxy Caching System for Streaming Media

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Wuhan University Journal of Natural Sciences 2004年第1期9卷 31-36页

作者： TanJin YuSheng-shengI ZhouJing-li CollegeofComputerScienceandTechnology HuazhongUniversityofScienceandTechnologyWuhan430074HubeiChina

With the widespread use of streaming media application on the Internet, a significant change in Internet workload will be provoked. Caching is one of the applied techniques for enhancing the scalability of streaming system and reducing the workload of server/network. Aiming at the characteristics of broadband network in community, we propose a popularity-based server-proxy caching strategy for streaming medias, and implement the prototype of streaming proxy caching based on this strategy, using RTSP as control protocol and RTP for content transport. This system can play a role in decreasing server load, reducing the traffic from streaming server to proxy, and improving the start-up latency of the client. Key words streaming server - proxy - cache - streaming media - real time streaming protocol CLC number TP 302 - TP 333 Foundation item: Supported by the National High Technology Development 863 Program of China (2001AA111011).Biography: Tan Jin (1962-), male, Ph. D candidate, research direction: network communications, multimedia technologies, and web caching.

关键词： streaming server proxy cache streaming media real time streaming protocol

Improvement of M-U-O and K-P-W proxy signature schemes

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Journal of Harbin Institute of Technology(New Series) 2002年第2期9卷 145-148页

作者：李继国曹珍富张亦辰 Dept. of Comp. Sci. and Eng. Harbin Inst. of Technol. Harbin 150001 China

The concept of proxy signature introduced by Mambo, Usuda, and Okamoto allows a designated person, called a proxy signer, to sign on behalf of an original signer in 1996. However, most existing proxy signature schemes does not support nonrepudiation. In this paper, we propose two secure nonrepudiable proxy signature schemes, which overcome disadvantages of M U O and K P W proxy signature schemes, respectively. The schemes proposed can withstand public key substitution attack and forge attack. In addition, our new schemes have some other advantages such as proxy signature key generation and updating using insecure channels. Our approach can also be applied to other ElGamal like proxy signature schemes.

关键词： nonrepudiable digital signature proxy signature multi-signature