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ROP GTPase-mediated auxin signaling regulates pavement cell interdigitation in Arabidopsis thaliana

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Journal of Integrative Plant Biology 2015年第1期57卷 31-39页

作者： Deshu lin Huibo Ren Ying fu Center for Genomics and Biotechnology Fujian Agriculture and Forestry University State Key Laboratory of Plant Physiology and Biochemistry College of Biological Sciences China Agricultural University

In multicellular plant organs, cell shape formation depends on molecular switches to transduce developmental or environmental signals and to coordinate cell-to-cell communi- cation. Plants have a specific subfamily of the Rho GTPase family, usually called Rho of Plants （ROP）, which serve as a critical signal transducer involved in many cellular processes. In the last decade, important advances in the ROP-mediated regulation of plant cell morphogenesis have been made by using Arubidopsis thaliana leaf and cotyledon pavement cells. Especially, the auxin-ROP signaling networks have been demonstrated to control interdigitated growth of pavement ceils to form jigsaw-puzzle shapes. Here, we review findingsrelated to the discovery of this novel auxin-signaling mecha- nism at the cell surface. This signaling pathway is to a large extent independent of the well-known Transport Inhibitor Response （TIR）-Auxin Signaling F-Box （AFB） pathway, and instead requires Auxin Binding Protein 1 （ABP1） interaction with the plasma membrane-localized, transmembrane kinase （TMK） receptor-like kinase to regulate ROP proteins. Once activated, ROP influences cytoskeletal organization and inhibits endocytosis of the auxin transporter PINt. The present review focuses on ROP signaling and its self-organizing feature allowing ROP proteins to serve as a bustling signal decoder and integrator for plant cell morphogenesis.

关键词： Auxin leaf pavement cell Rho of plants GTPase

DAWN: A Density Adaptive Routing for Deadline-Based Data Collection in Vehicular Delay Tolerant Networks

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Tsinghua Science and Technology 2013年第3期18卷 230-241页

作者： Qiao fu Bhaskar Krishnamachari lin Zhang the Department of Electronic Engineering Tsinghua University the Ming Hsieh Department of Electrical Engineering University of Southern California

Vehicular Delay Tolerant Networks （DTN） use moving vehicles to sample and relay sensory data for urban areas, making it a promising low-cost solution for the urban sensing and infotainment applications. However, routing in the DTN in real vehicle fleet is a great challenge due to uneven and fluctuant node density caused by vehicle mobility patterns. Moreover, the high vehicle density in urban areas makes the wireless channel capacity an impactful factor to network performance. In this paper, we propose a local capacity constrained density adaptive routing algorithm for large scale vehicular DTN in urban areas which targets to increase the packet delivery ratio within deadline, namely Density Adaptive routing With Node deadline awareness （DAWN）. DAWN enables the mobile nodes awareness of their neighbor density, to which the nodes＇ transmission manners are adapted so as to better utilize the limited capacity and increase the data delivery probability within delay constraint based only on local information. Through simulations on Manhattan Grid Mobility Model and the real GPS traces of 4960 taxi cabs for 30 days in the Beijing city, DAWN is demonstrated to outperform other classical DTN routing schemes in performance of delivery ratio and coverage within delay constraint. These simulations suggest that DAWN is practically useful for the vehicular DTN in urban areas.

关键词： delay tolerant networks node density adaptive routing deadline-based data collection channel capacity

Module Guard:A Gatekeeper for Dynamic Module Loading Against Malware

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Wuhan University Journal of Natural Sciences 2013年第6期18卷 489-498页

作者： DING shuang fu Jianming PENG Bichen School of Computer Wuhan University State Key Laboratory of Aerospace Information Security and Trusted Computing Ministry Education State Key Laboratory of Software Engineering Wuhan University

We analyze the attack steps of malware and focus on the malware loading. Our assumption is that a malware contains no less than one module, so monitoring module loading is indispensable to defeat malware. Moreover, we design security policies and employ these policies when a module is loaded by the operating system. These policies depend on properties of module, the connection to created modules, and the link to user intention. The properties of module and this connection can improve the accuracy of malware detection. User intention can be helpful to handle unknown module and enhances the flexibility of policy. Finally, ModuleGuard, a gatekeeper for dynamic module loading against malware, has been designed and implemented, which integrates these security policies. Our experimental results have shown the feasibility and effectiveness of our method.

关键词： module user intention security polices malware

Intermodel Diversity in the Zonal Location of the Climatological East Asian Westerly Jet Core in Summer and Association with Rainfall over East Asia in CMIP5 Models

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Advances in Atmospheric Sciences 2019年第6期36卷 614-622页

作者： Zhongda lin Yuanhai fu Riyu LU State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Climate Change Research Center Institute of Atmospheric Physics Chinese Academy of Sciences

The East Asian westerly jet(EAJ), an important midlatitude circulation of the East Asian summer monsoon system,plays a crucial role in affecting summer rainfall over East Asia. The multimodel ensemble of current coupled models can generally capture the intensity and location of the climatological summer EAJ. However, individual models still exhibit large discrepancies. This study investigates the intermodel diversity in the longitudinal location of the simulated summer EAJ climatology in the present-day climate and its implications for rainfall over East Asia based on 20 CMIP5 models. The results show that the zonal location of the simulated EAJ core is located over either the midlatitude Asian continent or the western North Pacific(WNP) in different models. The zonal shift of the EAJ core depicts a major intermodel diversity of the simulated EAJ climatology. The westward retreat of the EAJ core is related to a warmer mid–upper tropospheric temperature in the midlatitudes, with a southwest–northeast tilt extending from Southwest Asia to Northeast Asia and the northern North Pacific, induced partially by the simulated stronger rainfall climatology over South Asia. The zonal shift of the EAJ core has some implications for the summer rainfall climatology, with stronger rainfall over the East Asian continent and weaker rainfall over the subtropical WNP in relation to the westward-located EAJ core.

关键词： zonal location East Asian westerly jet summer rainfall intermodel diversity CMIP5

Temperature characteristics of wood during microwave treatments

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Journal of Forestry Research 2018年第6期29卷 1815-1820页

作者： Hui Xiao Lanying lin Feng fu Research Institute of Wood Industry Chinese Academy of Forestry Research Institute of Forestry New Technology Chinese Academy of Forestry

In order to investigate the temperature characteristics of wood during microwave(MW) treatments,optical fiber sensors were used to measure wood(Pinus sylvestris L. var. mongolica Litv.) temperatures. The results show that the development of internal temperatures in wood basically includes two patterns during the process of MW treatment. The first may be divided into three phases: warming, constant temperature, and a sharply rising phase. The second pattern may be divided into two phases: warming, and constant temperature. The maximum temperature(MT) and rate of temperature increase(RTI)rose as the microwave power increased. The initial wood moisture content decreased while the period of constant temperature fell. Temperatures varied in different positions in the wood. The order of MT and RTI levels were the upper surface, center, bottom surface and the end *** the direction of wood thickness, the closer the monitoring point was to the generator, the faster the temperature increased. The MT and RTI of the end point was a minimum value because of the rapid removal of steam.

关键词： Microwave treatment Pinus sylvestris var. mongolica Initial moisture content Microwave power Temperature characteristics

Limit theorems for supremum of Gaussian processes over a random interval

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Applied Mathematics(A Journal of Chinese Universities) 2018年第3期33卷 335-343页

作者： lin fu-ming PENG Zuo-xiang School of Statistics and Management Shanghai University of Finance and Economics School of Mathematics and Statistics Sichuan University of Science & Engineering School of Mathematics and Statistics Southwestern University

Let {X(t), t ≥ 0} be a centered stationary Gaussian process with correlation r(t)such that 1-r(t) is asymptotic to a regularly varying function. With T being a nonnegative random variable and independent of X(t), the... 详细信息

关键词： stationary Gaussian process supremum of a process regularly varying functions random intervals

PARAMETERS OF WATER CIRCULATION NETWORK FOR A DISTRICT HEATING AND COOlinG SYSTEM

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Journal of Hydrodynamics 2000年第1期12卷 87-95页

作者： fu, lin Pan, Jihong Jiang, Yi Shandong Univ of Technology Jinan China

In a district heating and cooling system, i.e. Beijing combined heating cooling and power (CHCP) system studied here, the high temperature water generated by two cogeneration plants circulates through a network between the plants and heat substations. At heat substations, the supply water of high temperature from the network drives absorption chillers for air-conditioning in summer and meets space heating demands in winter or domestic hot water demands by heat exchangers in the whole year. The parameters, i.e. supply/return water temperatures in the network, have a great impact on primary energy consumption (PEC) of the absorption chillers, circulation pumps and domestic hot water (DHW), which is studied in this paper.

关键词： Boiler circulation Energy utilization Hot water heating Parameter estimation Water cooling systems

Two Theorems on the Commutativity of Arbitrary Rings

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Acta Mathematica Sinica,English Series 2001年第1期17卷 133-140页

作者： Chang lin fu Xin Song YANG Department of Mathematics Harbin Univrsity of Science and Technology

We prove a theorem on the commutativity of the PI ring and use it to generalize a famous theorem of Herstein.

关键词： PI rings Commutativity Strong property F_k

Trust Evaluation Model Based on PSO and LSTM for Huge Information Environments

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Chinese Journal of Electronics 2021年第1期30卷 92-101页

作者： ZHANG lin HUANG Yanwen XUAN Jie fu Xiong lin Qiaomin WANG Ruchuan College of Computer Nanjing University of Posts and Telecommunications Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks

Due to the challenge of increasing data volume, the traditional trust model is unable to manage data with high efficiency and effectively extract useful information hidden in big data. To fully utilize big data and combine machine learning with trust evaluation, a trust evaluation model based on Long short-term memory(LSTM) is presented. The powerful learning ability,expressive ability and dynamic timing of LSTM can be applied to study data while avoiding the vanishing and exploding gradient phenomena of traditional Recurrent neural networks(RNNs) to ensure that the model can learn sequences of random length and provide accurate trust evaluation. Targeting the performance instability caused by the LSTM model’s random initialization of weights and thresholds, Particle swarm optimization(PSO), one of the intelligent algorithms, is introduced to find global optimal initial weights and *** proved that the trust model proposed in this paper has high accuracy and contributes a new idea for trust evaluation in big data environments.

关键词： LSTM model accurate trust evaluation traditional trust model vanishing particle swarm optimisation exploding gradient phenomena Long short-term memory big data environments huge information Big Data traditional Recurrent neural networks recurrent neural nets data volume powerful learning ability neural nets learning (artificial intelligence) trust evaluation model machine learning PSO