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Plant Sensing and Signaling in Response to K＋-Deficiency

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Molecular Plant 2010年第2期3卷 280-287页

作者： Yi Wang Wei-Hua wu State Key Laboratory of Plant Physiology and Biochemistry (SKLPPB) National Plant Gene Research Centre (Beijing) College of Biological Sciences ChinaAgricultural University Beijing 100193 China

Potassium （K＋） is one of the essential macronutrients for plant growth and development. However, K＋ content in soils is usually limited so that the crop yields are restricted. Plants may adapt to K＋-deficient environment by adjusting their physiological and morphological status, indicating that plants may have evolved their sensing and signaling mechanisms in response to K＋-deficiency. This short review particularly discusses some components as possible sensors or signal transducers involved in plant sensing and signaling in response to K＋-deficiency, such as K＋ channels and transporters, H＋-ATPase, some cytoplasmic enzymes, etc. Possible involvement of Ca2＋ and ROS signals in plant responses to K＋-deficiency is also discussed.

关键词： K+-deficiency K+ channel K+ transporter Ca2+ signaling.

Effect of Ultra-Fast Cooling on Microstructure of Large Section Bars of Bearing Steel

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Journal of Iron and Steel Research International 2009年第5期16卷 61-65,80页

作者： SUN Yan-kun wu Di The Transportation Engineering College Civil Aviation University of China Tianjin 300300 China State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China

The ultra-fast cooling technology of large section bars and the microstrueture for different cooling patterns were studied by optical microscope, transmission electron microscope and energy spectrometer. The results indicated that the large section bars were passed through the zone of secondary carbide precipitation quickly by ultra-fast cooling technology （UFC） at instantaneous cooling rate of about 200 ℃/s and the finishing cooling temperature was higher than Ms. The lamellar spacing of pearlite decreased and the microhardness increased with decreasing the rereddening temperature. The precipitation of network carbide was restrained when re-reddening temperature was 690 ℃. And fine laminated pearlite was obtained through transformation of pseudopearlition that induced the reduction of the diameter of pearlite grain and refinement of the lamellar spacing of pearlite, so ideal microstructures of promoting spheroidizing annealing were obtained.

关键词： ultra-fast cooling technology pearlite network carbide re-reddening temperature

MAXIMUM TREES OF FINITE SEQUENCES

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Applied Mathematics(A Journal of Chinese Universities) 1995年第2期10卷 223-228页

作者： wu SHIQUAN Center for Mathematical Sciences Zhejiang University Hangzhou

Let n, s1, s2,..., sn be non-negative integers and M(s1, s2,...,sn) ={(a1, a2,..., a.)| ai is an integer and 0≤ai ≤si for each i}. In this paper, the cardinality of maximum trees of finite sequences in M(s1, s2,..., sn) sn) is obtained, which generalizes some of Frankl's results on families of finite sets with prescribed cardinalities for pairwise intersections.

关键词： Tree of subsets finite sequences tree of finite sequences.

Knowledge Distillation Facilitates the Lightweight and Efficient Plant Diseases Detection Model

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Plant Phenomics 2023年第3期5卷 501-519页

作者： Qianding Huang Xingcai wu Qi Wang Xinyu Dong Yongbin Qin Xue wu Yangyang Gao gefei Hao State Key Laboratory of Public Big Data College of Computer Science and TechnologyGuizhou UniversityGuiyang 550025China Text Computing&Cognitive Intelligence Engineering Research Center of National Education Ministry Guizhou UniversityGuiyang 550025China National Key Laboratory of Green Pesticide Guizhou UniversityGuiyang 550025China

Plant disease diagnosis in time can inhibit the spread of the disease and prevent a large-scale drop in production,which benefits food *** detection-based plant disease diagnosis methods have attracted widespread attention due to their accuracy in classifying and locating ***,existing methods are still limited to single crop disease *** importantly,the existing model has a large number of parameters,which is not conducive to deploying it to agricultural mobile ***,reducing the number of model parameters tends to cause a decrease in model *** solve these problems,we propose a plant disease detection method based on knowledge distillation to achieve a lightweight and efficient diagnosis of multiple diseases across multiple *** detail,we design 2 strategies to build 4 different lightweight models as student models:the YOLOR-Light-v1,YOLOR-Light-v2,Mobile-YOLOR-v1,and Mobile-YOLOR-v2 models,and adopt the YOLOR model as the teacher *** develop a multistage knowledge distillation method to improve lightweight model performance,achieving 60.4%mAP@.5 in the PlantDoc dataset with small model parameters,outperforming existing ***,the multistage knowledge distillation technique can make the model lighter while maintaining high *** only that,the technique can be extended to other tasks,such as image classification and image segmentation,to obtain automated plant disease diagnostic models with a wider range of lightweight applicability in smart *** code is available at https://***/QDH/MSKD.

关键词： Plant diagnosis image

Effect of polycarboxylate-type superplasticizer on the paste fluidity based on the water film thickness of flocs

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Science China(Technological Sciences) 2014年第8期57卷 1522-1531页

作者： wu Qiong AN XueHui LIU ChunNa State Key Laboratory of Hydroscience and Engineering Tsinghua University

The excess water film theory and the properties of flocs are integrated to examine the effect of the polycarboxylate-type superplasticizer on the paste fluidity. The theory states that excess water can surround the flocs rather than the particles and that the cell consists of a floc and a superficial water film. Experiments on limestone powder pastes were conducted to verify the theory. The superplasticizer dosage （sp%） and the water-powder ratio by volume （Vw/Vv） were systematically varied. A sedimentation balance method was used to measure the size distribution of the flocs in the limestone powder pastes. The water film thickness （WFT） of flocs was then calculated and shown to determine the paste fluidity. Based on this WFT of flocs, the effect of the sp on the paste fluidity was determined and then compared with the effect of water.

关键词： water film thickness of flocs superplasticizer sedimentation balance method fluidity limestone powder paste

High Efficiency Dust Scrubbers for Continuous Miner in Underground Mines

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Journal of Central South University 2000年第4期12卷 205-211页

作者： wu Chao GU De-sheng College of Resources Environment and Civil EngineeringCentral South UniversityChangsha 410083China

Based on the experimental data by a full scale test model and the relevant existing achievements, four new concepts of group dust scrubbers were designed in the paper. The new dust scrubbers consist of two to four common dust separators in series: wet fan, wet Venturi and foam filter bed. Wetting and foaming agents are used to increase the efficiency of dust separation. High efficiency is not required for each part of the group dust scrubbers, but the whole system has a high working reliability. All parts of the group dust scrubbers have the most suitable separating efficiency for different size and concentration of dust particles in airflow, according to their technical features. Four group dust scrubbers have a high efficiency from 94.4% to 99.7% for separating respirable dust at a rational cost.

关键词： group dust scrubber foaming agent wetting agent wet-fan scrubber wet-Venturi scrubber foam filter bed continuous miner underground mine

Ultra-slow Bright and Dark Optical Solitons in Cold Media

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Communications in Theoretical Physics 2006年第2期45卷 335-342页

作者： YANG Xiao-Xue wu Ying physics Department Huazhong University of Science and Technology Wuhan 430074 China School of Physical Science and Information Technology Liaocheng UniversityLiaocheng 252059 China

We present a systematic study on the formation of ultra-slow bright and dark optical solitons in highly resonant media. By investigating four life-time broadened atomic systems, i.e., three-state A-type and cascade-type schemes, and four-state N-type and cascade-type schemes, we show that the formation of such ultra-slow solitons in cold atomic systems is a fairly universal phenomenon.

关键词： ultra-slow and super-luminal propagation electromagnetically induced transparency solitons

How does a strong surrounding magnetic field influence the evolution of a supernova remnant?

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Research in Astronomy and Astrophysics 2019年第9期19卷 21-28页

作者： Dan wu Meng-Fei Zhang College of Information Science and Technology Beijing Normal UniversityBeijing100875China University of Chinese Academy of Sciences Beijing100049China Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing100101China

We simulate the evolution of supernova remnants(SNRs) in a strong magnetic field. Usually,supernovae explode in a normal interstellar medium with magnetic field of no more than 50 μG, which has been well studied. However, the surrounding magnetic field will be much stronger in some situations, such as in a galactic center. Therefore, we try to explore these situations. The simulations show that a strong magnetic field of 1 mG will align the motion of ejecta in a way similar to a jet. The ejecta propagating perpendicularly to the magnetic field will be reflected and generate a strong reverse shock. When the reverse shock converges in the explosion center, it will more or less flow along the central magnetic field. Finally,most of the ejecta will propagate parallel to the magnetic field.

关键词： ISM:supernova remnants ISM:magnetic fields magnetohydrodynamics

STRONG CONSISTENCY OF M ESTIMATOR IN LINEAR MODEL FOR NEGATIVELY ASSOCIATED SAMPLES

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Journal of Systems Science & Complexity 2006年第4期19卷 592-600页

作者： Qunying wu Department of Maths and Physics Guilin University of Technology Ouilin 541004 China.

This paper discusses the strong consistency of M estimator of regression parameter in linear model for negatively associated samples. As a result, the author extends Theorem 1 and Theorem 2 of Shanchao YANG （2002） t... 详细信息

关键词： Linear model M estimator negatively associated sample strong consistency.