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Genetic regulation of shoot architecture in cucumber

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Horticulture Research 2021年第1期8卷 2054-2067页

作者： xiaofeng liu Jiacai Chen Xiaolan Zhang State Key Laboratories of Agrobiotechnology Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable CropsCollege of HorticultureChina Agricultural UniversityBeijing 100193China

Cucumber(Cucumis sativus L.)is an important vegetable crop species with great economic *** architecture determines the visual appearance of plants and has a strong impact on crop management and *** most model plant species,cucumber undergoes vegetative growth and reproductive growth simultaneously,in which leaves are produced from the shoot apical meristem and flowers are generated from leaf axils,during the majority of its life,a feature representative of the Cucurbitaceae *** substantial advances achieved in understanding the regulation of plant form in Arabidopsis thaliana,rice,and maize,our understanding of the mechanisms controlling shoot architecture in Cucurbitaceae crop species is still *** this review,we focus on recent progress on elucidating the genetic regulatory pathways underlying the determinant/indeterminant growth habit,leaf shape,branch outgrowth,tendril identity,and vine length determination in *** also discuss the potential of applying biotechnology tools and resources for the generation of ideal plant types with desired architectural features to improve cucumber productivity and cultivation efficiency.

关键词： flowers architectural shoot

Processing Constrained K Closest Pairs Query in Spatial Databases

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Wuhan University Journal of Natural Sciences 2006年第3期11卷 543-546页

作者： liu xiaofeng liu Yunsheng XIAO Yingyuan College of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074Hubei China

In this paper, constrained K closest pairs query is introduced, wbich retrieves the K closest pairs satisfying the given spatial constraint from two datasets. For data sets indexed by R trees in spatial databases, three algorithms are presented for answering this kind of query. Among of them, two-phase Range＋Join and Join＋Range algorithms adopt the strategy that changes the execution order of range and closest pairs queries, and constrained heap-based algorithm utilizes extended distance functions to prune search space and minimize the pruning distance. Experimental results show that constrained heap-base algorithm has better applicability and performance than two-phase algorithms.

关键词： spatial databases query processing R-tree closest pairs query constrained closest pairs query

Tracking Your Browser with High-Performance Browser Fingerprint Recognition Model

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China Communications 2020年第3期17卷 168-175页

作者： Wei Jiang Xiaoxi Wang Xinfang Song Qixu liu xiaofeng liu Chinese Academy of Cyberspace Studies Beijing 100010China College of Computer Science Beijing University of TechnologyBeijing100124China Beijing Information Technology College Beijing100015China Institute of Information Engineering Chinese Academy of SciencesBeijing100093China University of Chinese Academy of Sciences Beijing100049China

As the cyber security has attracted great attention in recent years,and with all kinds of tools’(such as Network Agent,VPN and so on)help,traditional methods of tracking users like log analysis and cookie have been not that *** for some privacy sensitive users who changed their browser configuration frequently to hide *** Browser Fingerprinting technology proposed by Electronic Frontier Foundation(EFF)gives a new approach of tracking users,and then our team designed an enhanced fingerprint dealing solution based on browser fingerprinting *** enhanced solution plays well in recognizing the similar fingerprints,but it is not that *** we improve the algorithm and propose a high-performance,efficient Browser Fingerprint Recognition *** new model reforms the fingerprint items set by EFF and propose a Fingerprint Tracking Algorithm(FTA)to deal with collected *** can associate users with some browser configuration changes in different periods of time quickly and *** testing with the experimental website built on the public network,we prove the high-performance and efficiency of our algorithm with a 20%time-consuming decrease than ever.

关键词： browser fingerprint AHP fingerprint tracking algorithm

Data-driven electrical resistance tomography for robotic large-area tactile sensing

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Science China(Information Sciences) 2024年第9期67卷 336-337页

作者： Wendong ZHENG Huaping liu xiaofeng liu Fuchun SUN School of Electrical Engineering and Automation Tianjin University of Technology Department of Computer Science and Technology Tsinghua University Key Laboratory of Maritime Intelligent Cyberspace Technology (Hohai University) Ministry of Education

Tactile sensing plays a crucial role in enabling robots to safely interact with objects in dynamic environments [1].Given that potential physical contact can occur at any location during robot interaction, there is a ... 详细信息

关键词： Robot applications

Fluvial terraces and their implications for Weihe River valley evolution in the Sanyangchuan Basin

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Science China Earth Sciences 2017年第3期60卷 413-427页

作者： GAO HongShan LI ZongMeng liu xiaofeng PAN BaoTian WU YaJie liu FenLiang Key Laboratory of Western China's Environmental System Ministry of EducationCollege of Earth and Environmental SciencesLanzhou UniversityLanzhou 730000China Lanzhou Institute of Seismology China Earthquake AdministrationLanzhou 730000China

Fluvial terraces are important geomorphic markers for modern valley *** coupled with numeric ages,terraces can provide abundant information about tectonic,climatic,paleohydrological and the paleoenvironmental *** the basis of the paleomagnetic,electron spin resonance(ESR) and optically stimulated luminescence(OSL) dating,in addition to an investigation of local loess-paleosol sequences,we confirmed that 13 fluvial terraces were formed,and then preserved,along the course of the Upper Weihe River in the Sanyangchuan Basin over the past 1.2 *** of the characteristics and genesis of these terraces indicate that they resulted from the response of this particular river system to climate change over an orbital *** changes can further be placed within the context of local and regional tectonic uplift,and represent an alternation between lateral migration and vertical incision,dependent upon the predominance of climatic and tectonic controls during different *** of the terraces are strikingly similar in that they have several meters of paleosols which have developed directly on top of fluvial deposits located on the terrace treads,suggesting that the abandonment of terraces due to river incision occurred during the transitions from glacial to interglacial *** temporal and spatial differences in the distribution patterns of terraces located on either side of the river valley indicate that a tectonic inversion occurred in Sanyangchuan Basin at-0.62 Ma,and that this was characterized by a transition from overall uplift to depression induced by fault *** studies of the Basin's terraces indicate that formation of the modern valley of the Upper Weihe River may have begun in the late Early Pleistocene between1.4-1.2 Ma.

关键词： River terrace Valley evolution Tectonic activity Climate change Sanyangchuan Basin

Evolutionary Game-theoretic Analysis for Residential Users Considering Integrated Demand Response

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Journal of Modern Power Systems and Clean Energy 2021年第6期9卷 1500-1509页

作者： Bingtuan Gao Chen Chen Yanhui Qin xiaofeng liu Zhenyu Zhu School of Electrical Engineering Southeast University Electric Power Research Institute of State Grid Xinjiang Electric Power Co. Ltd. School of Electrical Engineering Nanjing Normal University

As an important part of demand side,residential users have the characteristics of imperfect rationality and strong randomness,which are rarely considered in the existing ***,to effectively improve the energy efficiency,integrated demand response(IDR)is proposed as an effective measure to reduce the local energy supply *** paper focuses on a scenario for IDR programs,in which the intelligent building aggregator(IBA)wants to encourage residential users to participate in IDR according to a proper contract price *** analyze how the participation degree tendency evolves over time,an evolutionary game approach is proposed considering residential users’bounded-rationality.A symmetric evolutionary game model and an asymmetric evolutionary game model are established,and the stability of equilibrium points in the above models is *** results show that different contract price policies will obviously influence residential users’strategy,and affect the stable equilibrium points of the evolutionary *** simulation results provide an effective reference for IBA to set proper and effective price incentives.

关键词： Contract price evolutionary game intelligent community energy consumption behavior integrated demand response(IDR)

Single femtosecond laser beam induced nanogratings in transparentmedia - Mechanisms and applications

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Journal of Materiomics 2019年第1期5卷 1-14页

作者： Bo Zhang xiaofeng liu Jianrong Qiu State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou310027China College of Material Science and Engineering Zhejiang UniversityHangzhou310027China

Single femtosecond laser beam induced nanograting structure in transparent media has attracted extensive attention in many fields of science and technology in the past *** the excellent physicochemical properties and promising applications,it will continue to be a hot topic in the field of laser-matter interaction in the *** the recent ten years,both fundamental research and practical application have gained tremendous *** have witnessed the finding of novel fresh phenomena,imaginative physical models and promising technologies related to femtosecond laser induced nanogratings in transparent ***,despite those achievements,numerous issues related to mechanism,material dependence and process are still far from completely *** review will focus on recent research progress including basic properties,theory models,control methods and potential *** in recent five years are discussed in detail and several core issues are specially *** future developing trend is also prospected.©2019 The Chinese Ceramic Society.

关键词： Femtosecond laser Laser micromachining Nanograting Transparent medium Self-assembly

Game-theoretic energy management with storage capacity optimization in smart grids

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Journal of Modern Power Systems and Clean Energy 2018年第4期6卷 656-667页

作者： Bingtuan GAO xiaofeng liu Cheng WU Yi TANG School of Electrical Engineering Southeast University

With the development of smart grids, a renewable energy generation system has been introduced into a smart house. The generation system usually supplies a storage system with the capability to store the produced energy for satisfying a user's future demand. In this paper,the main objective is to determine the best strategies of energy consumption and optimal storage capacities for residential users, which are both closely related to the energy cost of the users. Energy management with storage capacity optimization is studied by considering the cost of renewable energy generation, depreciation cost of storage and bidirectional energy trading. To minimize the cost to residential users, the non-cooperative game-theoretic method is employed to formulate the model that combines energy consumption and storage capacity *** distributed algorithm is presented to understand the Nash equilibrium which can guarantee Pareto optimality in terms of minimizing the energy cost. Simulation results show that the proposed game approach can significantly benefit residential users. Furthermore, it also contributes toreducing the peak-to-average ratio(PAR) of overall energy demand.

关键词： Demand-side management Non-cooperative game Nash equilibrium Storage capacity optimization Energy consumption scheduling

Cyclostationary Feature Detection Based Spectrum Sensing Algorithm under Complicated Electromagnetic Environment in Cognitive Radio Networks

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China Communications 2015年第9期12卷 35-44页

作者： Yang Mingchuan Li Yuan liu xiaofeng Tang Wenyan Communication Research Center Harbin Institute of Technology Key Lab.for Spacecraft TT&C and Communication under the Ministry of Education Instrument Science and Technology Postdoctoral Station Harbin Institute of Technology

This paper focuses on improving the detection performance of spectrum sensing in cognitive radio(CR) networks under complicated electromagnetic environment. Some existing fast spectrum sensing algorithms cannot get specific features of the licensed users'(LUs') signal, thus they cannot be applied in this situation without knowing the power of noise. On the other hand some algorithms that yield specific features are too complicated. In this paper, an algorithm based on the cyclostationary feature detection and theory of Hilbert transformation is proposed. Comparing with the conventional cyclostationary feature detection algorithm, this approach is more flexible i.e. it can flexibly change the computational complexity according to current electromagnetic environment by changing its sampling times and the step size of cyclic frequency. Results of simulation indicate that this approach can flexibly detect the feature of received signal and provide satisfactory detection performance compared to existing approaches in low Signal-to-noise Ratio(SNR) situations.

关键词： cognitive radio cyclostationary feature detection Hilbert transformation