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| 1 | Heavy metals in rice and garden vegetables and their potential health risks to inhabitants in the vicinity of an industrial zone in Jiangsu, China显示文摘Contamination of soil and agricultural products by heavy metals resulting from rapid industrial development has caused major concern. In this study, we investigated heavy metal (Cu, Zn, Pb, Cr, Hg and Cd) concentrations in rice and garden vegetables, as well as in cultivated soils, in a rural-industrial developed region in southern Jiangsu, China, and estimated the potential health risks of metals to the inhabitants via consumption of locally produced rice and garden vegetables. A questionnaire-based survey on dietary consumption rates of foodstuffs showed that rice and vegetables accounted for 64% of total foodstuffs consumed, and over 60% of rice and vegetables were grown in the local region. Average concentrations of Cr, Cu, Zn, Cd, Hg and Pb were 0.75, 2.64, 12.00, 0.014, 0.006 and 0.054 mg/kg dw (dry weight) in rice and were 0.67, 1.18, 4.34, 0.011, 0.002 and 0.058 mg/kg fw (fresh weight) in garden vegetables, respectively. These values were all below the maximum allowable concentration in food in China except for Cr in vegetables. Leafy vegetables had higher metal concentrations than solanaceae vegetables. Average daily intake of Cr, Cu, Zn, Cd, Hg and Pb through the consumption of rice and garden vegetables were 5.66, 16.90, 74.21, 0.10, 0.04 and 0.43 μg/(kg·day), respectively. Although Hazard Quotient values of individual metals were all lower than 1, when all six metal intakes via self-planted rice and garden vegetables were combined, the Hazard Index value was close to 1. Potential health risks from exposure to heavy metals in self-planted rice and garden vegetables need more attention. | Hongbin Cao Jianjiang Chen Jun Zhang Hui Zhang Li Qiao Yi Men | 2010 | Journal of Environmental Sciences2010，22，11： | 61 |
| 2 | Spatial distribution pattern of Picea schrenkiana population in the Middle Tianshan Mountains and the relationship with topographic attributes显示文摘The spatial distribution of plant populations is an important feature of population structure and it determines the population's ecological preferences,biological characteristics and relationships with environmental factors.The point pattern analysis method was adopted to study the distribution pattern of Picea schrenkiana individuals of different size classes and the correlations between two size classes as well as the impact of topographical attributes on the population distribution.With increasing diameter at breast height,the plant density of the P.schrenkiana population showed a declining trend.Old trees showed a random distribution at a small spatial scale(0-12 m),whereas saplings,small trees and big trees all had an aggregated distribution at all scales.With the increase of tree age,the scales at which maximal aggregation occurred gradually increased and the aggregation strength decreased.At a small scale(0-16 m),all size classes showed a negative correlation and the larger the difference between tree size,the more significant the negative correlation.The number of medium,big and old trees had a significantly positive correlation with elevations,whereas the number of saplings and small trees was not significantly correlated with elevations.The numbers of saplings,small and medium trees showed a significant positive correlation with slope gradient,whereas the number of big trees was not significantly correlated,and the number of old trees was negatively correlated with gradient.With the exception of old trees,saplings,small,medium and big trees showed negative correlations with convexity index.The study provides a theoretical basis for the conservation,rehabilitation and sustainable management of forest ecosystems in the Tianshan Mountains. | YuTao ZHANG JiMei LI ShunLi CHANG Xiang LI JianJiang LU | 2012 | Journal of Arid Land2012，4，4： | 12 |
| 3 | Stress Corrosion Cracking of Nitrogen-containing Stainless Steel 316LN in High Temperature Water Environments显示文摘Stress corrosion cracking(SCC) of stainless steels and Ni-based alloys in high temperature water coolant is one of the key problems affecting the safe operation of nuclear power plants(NPPs).The nitrogen-added stainless steel is a kind of possible candidate materials for mitigating SCC since reducing the carbon content and adding nitrogen to offset the loss in strength caused by the decrease in carbon content can mitigate the problem of sensitization.However,the reports of SCC of nitrogen-added stainless steels in high temperature water are few available.The effects of applied potential and sensitization treatment on the SCC of a newly developed nitrogen-containing stainless steel(SS) 316LN in high temperature water doped with chloride at 250 ℃ were studied by using slow strain rate tests(SSRTs).The SSRT results are compared with our data previously published for 316 SS without nitrogen and 304NG SS with nitrogen,and the possible mechanism affecting the SCC behaviors of the studied steels is also discussed based on SSRT and microstucture analysis results.The susceptibility to cracking of 316LN SS normally increases with increasing potential.The susceptibility to SCC of 316LN SS was less than that of 316 SS and 304NG SS.Sensitization treatment at 700 ℃ for 30 h showed little effect on the SCC of 316LN SS and significant effect on the SCC of 316 SS.The predominant cracking mode for the 316LN SS in both annealed state and the state after the sensitization treatment was transgranular.The presented conditions of mitigating stress corrosion cracking are some useful information for the safe use of 316LN SS in NPPs. | YANG Wu LI Guangfu HUANG Chunbo ZHOU Jianjiang LU Zhanpeng | 2010 | Chinese Journal of Mechanical Engineering2010，23，6： | 9 |
| 4 | Progress of anti-vascular endothelial growth factor therapy for ocular neovascular disease: benefits and challenges显示文摘 | Xu Jianjiang Li Yimin Hong Jiaxu | 2014 | Chinese Medical Journal2014，，8： | 9 |
| 5 | Multiple-target tracking with adaptive sampling intervals for phased-array radar显示文摘A novel adaptive sampling interval algorithm for multitarget tracking is presented.This algorithm which is based on interacting multiple models incorporates the grey relational grade(GRG) into the particle swarm optimization(PSO).Firstly,the desired tracking accuracy is set for each target.Secondly,sampling intervals are selected as particles,and then the advantage of the GRG is taken as the measurement function for resource management.Meanwhile,the fitness value of the PSO is used to measure the difference between desired tracking accuracy and estimated tracking accuracy.Finally,it is suggested that the radar should track the target whose prediction value of the next sampling interval is the smallest.Simulations show that the proposed method improves both the tracking accuracy and tracking efficiency of the phased-array radar. | Zhenkai Zhang Jianjiang Zhou Fei Wang Weiqiang Liu Hongbing Yang | 2011 | Journal of Systems Engineering and Electronics2011，22，5： | 9 |
| 6 | Ethylene oligomerization by novel iron(Ⅱ) diimine complexes/MAO显示文摘Two novel Fe(Ⅱ) diimine complexes have been synthesized. In combination with MAO, they generate active catalytic systems that oligomerize ethylene with both high catalytic activity and high selectivity for a-olefins. The effects of substituents on the aryl ring, reaction temperatures and molar ratios of Al/Fe on catalytic activity and product distribution are studied. | WANG Hang, YAN Weidong, JIANG Tao, LIU Binbin, XU Wenqing, MA Jianjiang & HU YouliangState Key Laboratory of Engineering Plastics, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China Graduate Student of | 2002 | Chinese Science Bulletin2002，47，19： | 8 |
| 7 | MmWave Beamforming for UAV Communications with Unstable Beam Pointing显示文摘Millimeter wave(mmWave) communications of unmanned aerial vehicles(UAVs) have drawn dramatic attentions for its flexibility on a variety of applications.Recently,channel tracking base on the spatial features has been proposed to solve the problem of beam misalignments due to the UAV navigation.However,unstable beam pointing caused by the non-ideal beam tracking environment may impact the performance of mmWave systems significantly.In this paper,an improved beamforming method is presented to overcome this shortcoming.Firstly,the effect of the beam deviation is analyzed through the establishment of the equivalent data rate.Then,combining the quantification of spatial angle and the improved orthogonal matching pursuit(OMP) algorithm,an optimized beam corresponding to the beam deviation is obtained.Simulation results show that the optimized beam of the proposed approach can effectively improve the spectral efficiency without improving the complexity when the beam pointing is unstable. | Weizhi Zhong Lei Xu Qiuming Zhu Xiaomin Chen Jianjiang Zhou | 2019 | China Communications2019，16，1： | 7 |
| 8 | Clinical Efficacy of Oral Ganciclovir for Prophylaxis and Treatment of Recurrent Herpes Simplex Keratitis显示文摘 | Xin Wang Linnong Wang Nianlang Wu Xinjun Ma Jianjiang Xu | 2015 | Chinese Medical Journal2015，，1： | 7 |
| 9 | Optimum selection of common master image for ground deformation monitoring based on PS-DInSAR technique显示文摘Considering the joint effects of various factors such as temporal baseline, spatial baseline, thermal noise, the difference of Doppler centroid frequency and the error of data processing on the interference correlation, an optimum selection method of common master images for ground deformation monitoring based on the permanent scatterer and differential SAR interferometry (PS-DInSAR) technique is proposed, in which the joint correlation coeficient is used as the evaluation function. The principle and realization method of PS-DInSAR technology is introduced, the factors affecting the DInSAR correlation are analysed, and the joint correlation function model and its solution are presented. Finally an experiment for the optimum selection of common master images is performed by using 25 SAR images over Shanghai taken by the ERS-1/2 as test data. The results indicate that the optimum selection method for PS-DInSAR common master images is effective and reliable. | Zhu Zhengwei Zhou Jianjiang | 2009 | Journal of Systems Engineering and Electronics2009，20，6： | 6 |
| 10 | An Improved Algorithm for Optimizing MapReduce Based on Locality and Overlapping显示文摘MapReduce is currently the most popular programming model for big data processing, and Hadoop is a well-known MapReduce implementation platform. However, Hadoop jobs suffer from imbalanced workloads during the reduce phase and inefficiently utilize the available computing and network resources. In some cases, these problems lead to serious performance degradation in MapReduce jobs. To resolve these problems, in this paper,we propose two algorithms, the Locality-Based Balanced Schedule(LBBS) and Overlapping-Based Resource Utilization(OBRU), that optimize the Locality-Enhanced Load Balance(LELB) and the Map, Local reduce, Shuffle,and final Reduce(MLSR) phases. The LBBS collects partition information from input data during the map phase and generates balanced schedule plans for the reduce phase. OBRU is responsible for using computing and network resources efficiently by overlapping the local reduce, shuffle, and final reduce phases. Experimental results show that the LBBS and OBRU algorithms yield significant improvements in load balancing. When LBBS and OBRU are applied, job performance increases by 15% from that of models using LELB and MLSR. | Jianjiang Li Jie Wang Bin Lyu Jie Wu Xiaolei Yang | 2018 | Tsinghua Science and Technology2018，23，6： | 5 |
| 11 | Frequency and Similarity-Aware Partitioning for Cloud Storage Based on Space-Time Utility Maximization Model显示文摘With the rise of various cloud services, the problem of redundant data is more prominent in the cloud storage systems. How to assign a set of documents to a distributed file system, which can not only reduce storage space, but also ensure the access efficiency as much as possible, is an urgent problem which needs to be solved.Space-efficiency mainly uses data de-duplication technologies, while access-efficiency requires gathering the files with high similarity on a server. Based on the study of other data de-duplication technologies, especially the Similarity-Aware Partitioning(SAP) algorithm, this paper proposes the Frequency and Similarity-Aware Partitioning(FSAP) algorithm for cloud storage. The FSAP algorithm is a more reasonable data partitioning algorithm than the SAP algorithm. Meanwhile, this paper proposes the Space-Time Utility Maximization Model(STUMM), which is useful in balancing the relationship between space-efficiency and access-efficiency. Finally, this paper uses 100 web files downloaded from CNN for testing, and the results show that, relative to using the algorithms associated with the SAP algorithm(including the SAP-Space-Delta algorithm and the SAP-Space-Dedup algorithm), the FSAP algorithm based on STUMM reaches higher compression ratio and a more balanced distribution of data blocks. | Jianjiang Li Jie Wu Zhanning Ma | 2015 | Tsinghua Science and Technology2015，20，3： | 4 |
| 12 | A New Method for Calculating Priorities in AHP | XU Zeshui LU Jianjiang(Institute of Communications Engineering, Nanjing 210016, Jjangsu, China) | 1999 | Systems Science and Systems Engineering1999，9，2： | 4 |
| 13 | FUZZY PRINCIPAL COMPONENT ANALYSIS AND ITS KERNEL-BASED MODEL显示文摘Principal Component Analysis(PCA)is one of the most important feature extraction methods,and Kernel Principal Component Analysis(KPCA)is a nonlinear extension of PCA based on kernel methods.In real world,each input data may not be fully assigned to one class and it may partially belong to other classes.Based on the theory of fuzzy sets,this paper presents Fuzzy Principal Component Analysis(FPCA)and its nonlinear extension model,i.e.,Kernel-based Fuzzy Principal Component Analysis(KFPCA).The experimental results indicate that the proposed algorithms have good performances. | Wu Xiaohong Zhou Jianjiang | 2007 | Journal of Electronics(China)2007，24，6： | 4 |
| 14 | Metamorphism and Zircon Geochronological Studies of Metagabbro Vein in the Yushugou Granulite-Peridotite Complex from South Tianshan,China显示文摘Yushugou granulite-peridotite complex,located at the east part of the northern margin of South Tianshan,may represent an ophiolitic slice subducted to 40–50 km depth with high-pressure granulite facies metamorphism.Although a lot of studies have been conducted on rocks in this belt,the rock association and tectonic background of the ophiolitic slice are still in dispute.A detailed study on petrology,phase equilibrium modeling and U-Pb zircon ages have been performed on the metagabbro vein in peridotite unit to constrain the tectonic evolution of the Yushugou granulite-peridotite complex.Three stages of mineral assemblage in the metagabbro were defined as stage I:Cpx^A+Opx^A+Pl^A,which represents the original minerals of the metagabbro vein;stage II:Cpx^B+Opx^B+Pl^B+Spl,which represents the mineral assemblage of granulite facies metamorphism with peak P-T conditions of 4.2–6.9 kbar and 940–1070℃;stage III is characterized by the existence of prehnite,thomsonite and amphibole in the matrix,indicating that the metagabbro vein may be influenced by fluids during retrograde metamorphism.Combined with the crosscut relationship,it can be deduced that the metagabbro vein,together with the peridotite in Yushugou granulite-peridotite complex has experienced similar high-temperature granulite facies metamorphism.The zircon chronological data shows that the protolith age of the metagabbro vein is 400.5±6.2 Ma,reflecting Devonian magmatism event and the granulite facies metamorphism occurred at^270 Ma which may be related to the post-collisional magmatism. | Lu Zhang Jianjiang Zhu Bin Xia Cong Zhang Lifei Zhang | 2019 | Journal of Earth Science2019，30，6： | 3 |
| 15 | A Raw Signal Simulator for Bistatic SAR显示文摘This article proposes a new efficient raw signal simulator for the bistatic synthetic aperture radar(SAR) based on 2D fast Fourier transform(FFT) to deal with cases of both ideal trajectory and trajectory deviation.It begins with analyzing the geometric configuration and the range history of the bistatic SAR in side-looking and squint modes of ideal trajectory as well as trajectory deviation.Then a detailed and mathematical study is conducted on the equivalence relation of bistatic-to-monostatic applications(BTMA) in the case of ideal trajectory and trajectory deviation.Also a set of formulas are derived for the equivalence relation between bistatic SAR and monostatic SAR on some reasonable assumptions.Therefore,the application of the simulation method based on the 2D FFT for the monostatic SAR can be extended to the case of bistatic SAR.Finally,the simulation results prove the validity of this method.By comparing the efficiency of the proposed method with that of the time domain method,it is shown that the former is a few orders of magnitude higher. | Xia Weijie,Zhou Jianjiang College of Information Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China | 2009 | Chinese Journal of Aeronautics2009，22，4： | 2 |
| 16 | Highly active multivalent multielement catalysts derived from hierarchical porous TiNb_(2)O_(7) nanospheres for the reversible hydrogen storage of MgH_(2)显示文摘Critical limitations in applying MgH_(2) as a hydrogen-storage medium include the high H_(2) desorption temperature and slow reaction kinetics.In this study,we synthesized hierarchical porous TiNb_(2)O_(7) spheres in micrometer scale built with 20-50 nm nanospheres,which showed stable activity to catalyze hydrogen storage in MgH_(2) as precursors.The addition of 7 wt.%TiNb_(2)O_(7) in MgH_(2) reduced the dehydrogenation onset temperature from 300 to 177℃.At 250℃,approximately 5.5 wt.%H_(2) was rapidly released in 10 min.Hydrogen uptake was detected even at room temperature under 50 bar hydrogen;4.5 wt.%H_(2) was absorbed in 3 min at 150℃,exhibiting a superior low-temperature hydrogenation performance.Moreover,nearly constant capacity was observed from the second cycle onward,demonstrating stable cyclability.During the ball milling and initial de/hydrogenation process,the high-valent Ti and Nb of TiNb_(2)O_(7) were reduced to the lower-valent species or even zero-valent metal,which in situ created multivalent multielement catalytic surroundings.A strong synergistic effect was obtained for hybrid oxides of Nb and Ti by density functional theory(DFT)calculations,which largely weakens the Mg-H bonding and results in a large reduction in kinetic barriers for hydrogen storage reactions of MgH_(2).Our findings may guide the further design and development of high-performance complex catalysts for the reversible hydrogen storage of hydrides. | Lingchao Zhang Ke Wang Yongfeng Liu Xin Zhang Jianjiang Hu Mingxia Gao Hongge Pan | 2021 | Nano Research2021，14，1： | 2 |
| 17 | Crystal-KMC: Parallel Software for Lattice Dynamics Monte Carlo Simulation of Metal Materials显示文摘Kinetic Monte Carlo(KMC) is a widely used method for studying the evolution of materials at the microcosmic level. At present, while there are many simulation software programs based on this algorithm, most focus on the verification of a certain phenomenon and have no analog-scale requirement, so many are serial in nature. The dynamic Monte Carlo algorithm is implemented using a parallel framework called SPPARKS, but it does not support the Embedded Atom Method(EAM) potential, which is commonly used in the dynamic simulation of metal materials. Metal material — the preferred material for most containers and components — plays an important role in many fields, including construction engineering and transportation. In this paper, we propose and describe the development of a parallel software program called Crystal-KMC, which is specifically used to simulate the lattice dynamics of metallic materials. This software uses MPI to achieve a parallel multiprocessing mode, which avoid the limitations of serial software in the analog scale. Finally, we describe the use of the parallel-KMC simulation software Crystal-KMC in simulating the diffusion of vacancies in iron, and analyze the experimental results. In addition, we tested the performance of Crystal-KMC in 'meta-Era' supercomputing clusters, and the results show the Crystal-KMC parallel software to have good parallel speedup and scalability. | Jianjiang Li Peng Wei Shaofeng Yang Jie Wu Peng Liu Xinfu He | 2018 | Tsinghua Science and Technology2018，23，4： | 2 |
| 18 | Reactive scheduling of multiple EOSs under cloud uncertainties:model and algorithms显示文摘Most earth observation satellites(EOSs)are low-orbit satellites equipped with optical sensors that cannot see through clouds.Hence,cloud coverage,high dynamics,and cloud uncertainties are important issues in the scheduling of EOSs.The proactive-reactive scheduling framework has been proven to be effective and efficient for the uncertain scheduling problem and has been extensively employed.Numerous studies have been conducted on methods for the proactive scheduling of EOSs,including expectation,chance-constrained,and robust optimization models and the relevant solution algorithms.This study focuses on the reactive scheduling of EOSs under cloud uncertainties.First,using an example,we describe the reactive scheduling problem in detail,clarifying its significance and key issues.Considering the two key objectives of observation profits and scheduling stability,we construct a multi-objective optimization mathematical model.Then,we obtain the possible disruptions of EOS scheduling during execution under cloud uncertainties,adopting an event-driven policy for the reactive scheduling.For the different disruptions,different reactive scheduling algorithms are designed.Finally,numerous simulation experiments are conducted to verify the feasibility and effectiveness of the proposed reactive scheduling algorithms.The experimental results show that the reactive scheduling algorithms can both improve observation profits and reduce system perturbations. | WANG Jianjiang HU Xuejun HE Chuan | 2021 | Journal of Systems Engineering and Electronics2021，32，1： | 2 |
| 19 | Quantificational Etching of AAO Template显示文摘Ni nanowires 被电极淀积在从 命令solution.Well 的 Ni nanowire 数组 withcontrollable 长度当时是的合成电解质的模板用磷的 acidand 的混合物由 AAO 的部分移动做了的多孔的阳极化的 aluminumoxide ( AAO )准备铬的酸( 6 wt % H3PO4:1.8 wt % H3CrO4 ) Ni nanowire 数组的 .The 图象是学习 byscanning 电子显微镜学( SEM )决定在蚀刻时间和 lengthof Ni nanowire arrays.The | Guojun SONG Dong CHEN Zhi PENG Xilin SHE Jianjiang LI Ping HAN | 2007 | Journal of Materials Science & Technology2007，23，3： | 2 |
| 20 | Significant effect of NH4+ on cordycepin production by submerged cultivation of medicinal mushroom Cordyceps militaris显示文摘 | MAO Xianbing ZHONG Jianjiang | 2006 | Enzyme Microb Tech2006，38，34： | 1 |
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