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Internal phosphate starvation signaling and external phosphate availability have no obvious effect on the accumulation of cadmium in rice

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Journal of Integrative Agriculture 2019年第9期18卷 2153-2161页

作者： WANG Xue-qing RUAN Wen-yuan yi ke-ke key Laboratory of Plant Nutrition and Fertilizer Ministry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences

Phosphorus(P)is a limiting nutrient element for *** obtain maximum crop yield,P fertilizer is often over-applied,which leads to accelerating exhaustion of phosphate resources and serious environmental *** the application of P fertilizer and enhancing the P utilization efficiency of crops are significant for the sustainable development of ***(Cd)contamination in rice is another serious agricultural ***,whether reducing the application of P fertilizer and enhancing the P utilization efficiency of crops will increase the risk of Cd accumulation in crops remains *** this study,we are aiming to elucidate the relationship between Cd and P in rice from physiological and genetic *** this purpose,the wild type(WT)rice plants and phosphate(Pi)-starvation signaling repressed mutant phr2 were used to analyze the relationship between Cd and ***,we found that Cd stress could promote P accumulation and induce Pi-starvation signaling in WT and phr2 shoots under Pi-sufficient condition in a PHOSPHATE STARVATION RESPONSE 2(PHR2)independent ***,the expression level of Cd transporter of OsNramp5 and the uptake speed of Cd2+were not obviously changed under Pi-sufficient and Pi-deficient ***,our Cd determination results showed that the Cd concentrations in WT and phr2 were not obviously changed under Pi-sufficient and Pi-deficient *** results indicate that the external P availability and internal Pi-starvation signaling cannot obviously affect the accumulation of Cd in rice seedling.

关键词： cadmium phosphorus Cd-accumulation Pi-starvation signaling Pi-availability

An accelerated augmented Lagrangian method for linearly constrained convex programming with the rate of convergence O(1/k^2)

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Applied Mathematics(A Journal of Chinese Universities) 2017年第1期32卷 117-126页

作者： ke yi-fen MA Chang-feng School of Mathematics and Computer Science & FJKLMAA Fujian Normal University Fuzhou 350117 China.

In this paper, we propose and analyze an accelerated augmented Lagrangian method（denoted by AALM） for solving the linearly constrained convex programming. We show that the convergence rate of AALM is O（1/k^2） while the convergence rate of the classical augmented Lagrangian method（ALM） is O1 k. Numerical experiments on the linearly constrained 1-2minimization problem are presented to demonstrate the effectiveness of AALM.

关键词： convex augmented constrained minimization accelerated Lagrangian linearly iteration sparse stopping

DAMAGE DETECTION STRATEGY FOR RETICULATED STRUCTURES BASED ON INCOMPLETE STRAIN MODE

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Acta Mechanica Solida Sinica 2011年第4期24卷 308-317页

作者： Zhao-Dong Xu ke-yi Wu key Laboratory of C&PC Structure of the Ministry of Education Southeast UniversityNanjing 210096China

Damage detection based on strain responses of vibration is highly attractive for monitoring long-span reticulated ***,there are a lot of structure members in reticulated structures and it is impossible to install strain sensors in each ***,how to locate and quantify damages with the incomplete mode shapes obtained from few strain sensors is a challenge topic.A new strategy,named incomplete strain mode damage detection（ISMDD） strategy,is proposed in this *** the strategy,the distribution of the strain sensors in the reticulated structures can be optimized through sensitive analysis on strain mode perturbation matrix,which can be obtained by perturbation *** assurance criterion（MAC） value is applied in damage location,and the members with relative large MAC values are defined as damage *** addition,damage index obtained by solving the perturbation equation is used for damage *** analysis on a long-span reticulated structure,including damage location and quantification for single-and multi-member damages,detection for different damage quantity,the effect analysis of sensor quantity,are performed to verify the effectiveness of the proposed ISMDD *** can be shown from the analysis that the ISMDD strategy is effective in damage location and quantification for both single-and multi-member *** the quantity of strain sensors has effect on damage location,but has no obvious influence on damage ***,the anti-noise pollution ability analysis of the ISMDD strategy is carried out,which shows that the ISMDD strategy has excellent anti-noise pollution ability for both single-and multi-damaged members.

关键词： damage detection reticulated structure strain responses optimal sensor placement

IC Cloud: Enabling Compositional Cloud

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International Journal of Automation and computing 2011年第3期8卷 269-279页

作者： yi-ke Guo Li Guo Department of Computing Imperial College London London SW7 2BZ UK

Cloud computing has attracted great interest from both academic and industrial communities. Different paradigms, architectures and applications based on the concept of cloud have emerged. Although many of them have been quite successful, efforts are mainly focusing on the study and implementation of particular setups. However, a generic and more flexible solution for cloud construction is missing. In this paper, we present a composition-based approach for cloud computing （compositional cloud） using Imperial College Cloud （IC Cloud） as a demonstration example. Instead of studying a specific cloud computing system, our approach aims to enable a generic framework where wrious cloud computing architectures and implementation strategies can be systematically studied. With our approach, cloud computing providers/adopters are able to design and compose their own systems in a quick and flexible manner. Cloud computing systems will no longer be in fixed shapes but will be dynamic and adjustable according to the requirements of different application domains.

关键词： Cloud computing compositional cloud infrastructure as a service (IaaS) cloud service cloud elasticity.

An improved morphological weighted dynamic similarity measurement algorithm for time series data

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International Journal of Intelligent Computing and Cybernetics 2018年第4期11卷 486-495页

作者： ke yi Zhou Shaolin Hu School of Automation and Information Engineering Xi’an University of TechnologyXi’anChina School of Automation Foshan UniversityFoshanChina

Purpose–The similarity measurement of time series is an important research in time series detection,which is a basic work of time series clustering,anomaly discovery,prediction and many other data mining *** purpose of this paper is to design a new similarity measurement algorithm to improve the performance of the original similarity measurement *** subsequence morphological information is taken into account by the proposed algorithm,and time series is represented by a pattern,so the similarity measurement algorithm is more ***/methodology/approach–Following some previous researches on similarity measurement,an improved method is *** new method combines morphological representation and dynamic time warping(DTW)technique to measure the similarities of time *** the segmentation of time series data into segments,three parameter values of median,point number and slope are introduced into the improved distance measurement *** effectiveness of the morphological weighted DTW algorithm(MW-DTW)is demonstrated by the example of momentum wheel data of an aircraft attitude control ***–The improved method is insensitive to the distortion and expansion of time axis and can be used to detect the morphological changes of time series *** results confirm that this method proposed in this paper has a high accuracy of similarity *** implications–This improved method has been used to solve the problem of similarity measurement in time series,which is widely emerged in different fields of science and engineering,such as the field of control,measurement,monitoring,process signal processing and economic ***/value–In the similarity measurement of time series,the distance between sequences is often used as the only detection *** results of similarity measurement should not be affected by the longitudinal or transverse stretching and translation changes of the sequence,s

关键词： Dynamic time warping Morphological representation Similarity measurement Time series data

Snake-Hot-Eye-Assisted Multi-Process-Fusion Target Tracking Based on a Roll-Pitch Semi-strapdown Infrared Imaging Seeker

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Journal of Bionic Engineering 2022年第4期19卷 1124-1139页

作者： Jian Chen Zichao Zhang ke yi Yu Han Zhang Ren College of Engineering China Agricultural UniversityBeijing 100083China key Laboratory of Urban Land Resources Monitoring and Simulation Ministry of Natural ResourcesShenzhen 518000China Systems Engineering Research Institute China State Shipbuilding Corporation LimitedBeijing 100094China College of Water Resources and Civil Engineering China Agricultural UniversityBeijing 100083China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China

Aiming at intercepting large maneuvering targets precisely,the guidance law of advanced self-seeking missiles requires not only inertial line-of-sight(LOS)angular rate but also target maneuvering ***,the semi-strapdown stabilization platform has lost the ability to measure the inertial LOS angular rate directly,which needs to be extracted by numerical *** differential operation commonly used in traditional methods can magnify the measurement error of the sensor,resulting in insufficient calculation accuracy of the line-of-sight angular *** analyzing the mathematical relationship between the missile-target relative motion and the angle tracking system,a multi-process-fusion integrated filter model of relative motion and angle tracking is *** overcome the defect that the infrared seeker cannot directly measure the missile-target distance,following the snake-hot-eye visual mechanism,a visual bionic imaging guidance method of estimating the missile-target relative distance from the infrared images is proposed to improve the observability of the filter ***,target-tracking simulations verify that the estimation accuracy of target acceleration is improved by four times.

关键词： Roll-pitch semi-strapdown Infrared imaging seeker Target tracking Biological visual mechanism Snake hot eye Integrated filter

A new ventilation mode of air conditioning in subway vehicles and its air distribution performance

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Energy and Built Environment 2021年第1期2卷 94-104页

作者： Zhiyuan Chang ke yi Weiwei Liu School of Energy Science&Engineering Central South UniversityChangshaHunanChina CRRC Zhuzhou Electric Locomotive Co. Ltd.ZhuzhouHunanChina

The traditional ventilation mode of subway vehicles adopts the form that the inlets and outlets are placed on the upper part of the *** air distribution formed in this mode often cause serious problems of thermal comfort and energy *** order to solve these problems caused by the traditional ventilation mode,a new hybrid ventilation mode was *** hybrid ventilation mode uses both upper and underside air supply inlets.A method for evaluating the air distribution performance of subway air conditioning was *** method applies non-uniformity coefficients,maximum temperature difference,air diffusion performance index,modified energy utilization coefficient and Air short-circuit comprehensive *** short-circuit comprehensive coefficient was a new index to evaluate the degree of air short-circuit of supply *** on the airflow simulation,the air distribution performance for the hybrid ventilation mode was evaluated using these indexes,and compared with the traditional ventilation *** results show that compared with the traditional ventilation mode,the hybrid ventilation mode has more uniform temperature distribution,better thermal comfort,higher energy utilization efficiency and lower degree of air short-circuit of supply air.

关键词： Air conditioning supply Air distribution performance Air short-circuit Subway

Hybrid decompression technique and two-level corpectomy are effective treatments for three-level cervical spondylotic myelopathy

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第9期10卷 696-701页

作者： Yong LIU ke-yi YU Jian-hua HU Department of Orthopaedics Peking Union Medical College HospitalPeking Union Medical College Chinese Academy of Medical Sciences Beijing 100730 China

The optimal surgical strategy for multilevel cervical spondylotic myelopathy （CSM） has not been defined, and few comparative researches between hybrid decompression and multilevel corpectorny have been conducted. Here, we reported 28 patients of three-level CSM, of whom 12 underwent hybrid decompression and 16 two-level corpectomy, with each type of procedure chosen according to radiologic characteristics of those patients. Clinical and radiologic parameters of both groups showed various degrees of improvement. However, no statistically significant differences in Japanese Orthopedic Association （JOA） score improvement rate, graft fusion rate, post-operative neck disability index （NDI） or segmental lordosis between the two groups were found. We conclude that both hybrid decompression and two-level corpectomy could obtain satisfying clinical efficacy in the management of three-level CSM for appropriate patients.

关键词： Three-level cervical spondylotic myelopathy (CSM) Hybrid decompression Corpectomy

Effective Variational Data Assimilation in Air-Pollution Prediction

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Big Data Mining and Analytics 2018年第4期1卷 297-307页

作者： Rossella Arcucci Christopher Pain yi-ke Guo Data Science Institute Department of ComputingImperial College LondonLondonSW72AZUnited Kingdom Department of Earth Science&Engineering Imperial College LondonLondonSW72AZUnited Kingdom

Numerical simulations are widely used as a predictive tool to better understand complex air flows and pollution transport on the scale of individual buildings,city blocks,and entire *** improve prediction for air flows and pollution transport,we propose a Variational Data Assimilation(VarDA)model which assimilates data from sensors into the open-source,finite-element,fluid dynamics model *** is based on the minimization of a function which estimates the discrepancy between numerical results and observations assuming that the two sources of information,forecast and observations,have errors that are adequately described by error covariance *** conditioning of the numerical problem is dominated by the condition number of the background error covariance matrix which is *** this paper,a preconditioned VarDA model is presented,it is based on a reduced background error covariance *** Empirical Orthogonal Functions(EOFs)method is used to alleviate the computational cost and reduce the space *** results are provided assuming observed values provided by sensors from positions mainly located on roofs of buildings.

关键词： data assimilation reduced order space big data preconditioning