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| 1 | Real-time transient stability assessment in power system based on improved SVM显示文摘Due to the strict requirements of extremely high accuracy and fast computational speed, real-time transient stability assessment(TSA) has always been a tough problem in power system analysis.Fortunately, the development of artificial intelligence and big data technologies provide the new prospective methods to this issue, and there have been some successful trials on using intelligent method, such as support vector machine(SVM) method.However, the traditional SVM method cannot avoid false classification, and the interpretability of the results needs to be strengthened and clear.This paper proposes a new strategy to solve the shortcomings of traditional SVM,which can improve the interpretability of results, and avoid the problem of false alarms and missed alarms.In this strategy, two improved SVMs, which are called aggressive support vector machine(ASVM) and conservative support vector machine(CSVM), are proposed to improve the accuracy of the classification.And two improved SVMs can ensure the stability or instability of the power system in most cases.For the small amount of cases with undetermined stability, a new concept of grey region(GR) is built to measure the uncertainty of the results, and GR can assessment the instable probability of the power system.Cases studies on IEEE 39-bus system and realistic provincial power grid illustrate the effectiveness and practicability of the proposed strategy. | Wei HU Zongxiang LU Shuang WU Weiling ZHANG Yu DONG Rui YU Baisi LIU | 2019 | Journal of Modern Power Systems and Clean Energy2019，7，1： | 14 |
| 2 | Analysis of DNA methylation variation in wheat genetic background after alien chromatin introduction based on methylation-sensitive amplification polymorphism显示文摘During the process of alien germplasm introduced into wheat genome by chromosome engineering, extensive genetic variations of genome structure and gene expression in recipient could be induced. In this study, we performed GISH (genome in situ hybridization) and AFLP (amplified fragment length po-lymorphism) on wheat-rye chromosome translocation lines and their parents to detect the identity in genomic structure of different translocation lines. The results showed that the genome primary struc-ture variations were not obviously detected in different translocation lines except the same 1RS chromosome translocation. Methylation sensitive amplification polymorphism (MSAP) analyses on genomic DNA showed that the ratios of fully-methylated sites were significantly increased in translo-cation lines (CN12, 20.15%; CN17, 20.91%; CN18, 22.42%), but the ratios of hemimethylated sites were significantly lowered (CN12, 21.41%; CN17, 23.43%; CN18, 22.42%), whereas 16.37% were fully-me-thylated and 25.44% were hemimethylated in case of their wheat parent. Twenty-nine classes of me-thylation patterns were identified in a comparative assay of cytosine methylation patterns between wheat-rye translocation lines and their wheat parent, including 13 hypermethylation patterns (33.74%), 9 demethylation patterns (22.76%) and 7 uncertain patterns (4.07%). In further sequence analysis, the alterations of methylation pattern affected both repetitive DNA sequences, such as retrotransposons and tandem repetitive sequences, and low-copy DNA. | ZHANG Yong LIU ZhaoHui LIU Cheng YANG ZuJun DENG KeJun PENG JinHua ZHOU JianPing LI GuangRong TANG ZongXiang REN ZhengLong | 2008 | Chinese Science Bulletin2008，53，1： | 8 |
| 3 | Assessment of structural stability in Bohai Sea area based on AHP-GDM model显示文摘The AHP-GDM model is used for the assessment of structural stability, with the Bohai Sea area as an example. In this model, the credit degree of each expert is calculated through the assessment matrix based on the similarity and diversity of vector. The comprehensive opinions of expert panel are quantitatively obtained by considering the effect of credit degree. According to the geological structural setting, the Bohai Sea is divided into twelve assessment zones of structural stability by non-uniform element method. The structural stability grade of each zone is obtained on the basis of the latest geophysical data, earthquake statistical data, and the information of fault activities, current stress field and crustal deformation. The results show that there are one relatively stable area, three relatively sub-stable areas, six relatively sub-unstable areas and two relatively unstable areas. The assessment results of non-uniform element method are very close with those of uniform grid method with size of 0.25° in longitude direction and 0.14° in latitude direction. However the workload of non-uniform element method is only 1/16 of the latter. Compared with traditional assessment methods of structural stability, a more objective and reliable assessment result can be obtained by combining non-uniform element method and AHP-GDM model. | XIU Zongxiang LIU Baohua XIE Qiuhong LI Xishuang LIU Chenguang PEI Yanliang ZHENG Yanpeng | 2013 | Acta Oceanologica Sinica2013，32，4： | 8 |
| 4 | Runout prediction and dynamic characteristic analysis of a potential submarine landslide in Liwan 3-1 gas field显示文摘A large number of submarine landslides with different scales have been identified in the canyon area of the submarine pipeline route of Liwan 3-1 gas field. There is still much chance that submarine slope failures would happen, and the following mass movement would present great risk to the submarine pipeline. In view of this, a numerical prediction method based on Eulerian-Eulerian two-phase flow model is introduced to simulate the mass movement of potential submarine landslides. The sliding soil and ambient water are respectively simulated by Herschel-Bulkley rheology model and Newtonian fluid model. The turbulence is simulated using the k-e model. Compared with both the experiment data and Bing result, the two-phase flow model shows a good accuracy, and its result is more close to the actual situation; the dynamic coupling between soil and ambient water can be effectively simulated and the phenomena of hydroplaning and head detachment can be obtained.Finally, the soil movement of a potential submarine landslide is simulated as an example, according to the seismic profile in the canyon area. The result shows that the hydroplaning occurs during the movement process. The runout distance calculated by the two-phase flow model is 877 m, which is 27.1% larger than the Bing result.However, the peak front velocity of soil is relative small, with a maximum value of 8.32 m/s. The Bing program with a simple and rapid process can be used for a preliminary evaluation, while the two-phase flow model is more appropriate for an accurate assessment. | XIU Zongxiang LIU Lejun XIE Qiuhong LI Jiagang HU Guanghai YANG Jianghui | 2015 | Acta Oceanologica Sinica2015，34，7： | 6 |
| 5 | Editor's note显示文摘In this paper,a new version of the general form of the main inequality of Reich-Strebel is given.As applications,we improve the strong triangle inequality and generalize the Delta inequality in certain sense. | LIU ZongXiang XIE WeiXin WANG Pin YU You | 2014 | Science China(Information Sciences)2014，57，4： | 4 |
| 6 | A sequential GM-based PHD filter for a linear Gaussian system显示文摘The probability hypothesis density(PHD)flter provides an efciently parallel processing method for multi-target tracking.However,measurements have to be gathered for a scan period before the PHD flter can perform a recursion,therefore,signifcant delay may arise if the scan period is long.To reduce the delay in the PHD flter,we propose a sequential PHD flter which updates the posterior intensity whenever a new measurement becomes available.An implementation of the sequential PHD flter for a linear Gaussian system is also developed.The unique characteristic of the proposed flter is that it can retain the useful information of missed targets in the posterior intensity and sequentially handle the received measurements in time. | LIU ZongXiang | 2013 | Science China(Information Sciences)2013，56，10： | 3 |
| 7 | Identification of New Resistance Loci Against Sheath Blight Disease in Rice Through Genome-Wide Association Study显示文摘Sheath blight(SB) caused by the soil borne pathogen Rhizoctonia solani is one of the most serious global rice diseases. Breeding resistant cultivar is the most economical and effective strategy to control the disease. However, no rice varieties are completely resistant to SB, and only a few reliable quantitative trait loci(QTLs) linked with SB resistance have been identified to date. In this study, we conducted a genome-wide association study(GWAS) of SB resistance using 299 varieties from the rice diversity panel 1(RDP1) that were genotyped using 44 000 high-density single nucleotide polymorphism(SNP) markers. Through artificial inoculation, we found that only 36.5% of the tested varieties displayed resistance or moderate resistance to SB. In particular, the aromatic and aus sub-populations displayed higher SB resistance than the tropical japonica(TRJ), indica and temperate japonica sub-populations. Seven varieties showed similar resistance levels to the resistant control YSBR1. GWAS identified at least 11 SNP loci significantly associated with SB resistance in the three independent trials, leading to the identification of two reliable QTLs, qSB-3 and qSB-6, on chromosomes 3 and 6. Using favorable alleles or haplotypes of significantly associated SNP loci, we estimated that both QTLs had obvious effects on reducing SB disease severity and can be used for enhancing SB resistance, especially in improving SB resistance of TRJ sub-population rice varieties. These results provided important information and genetic materials for developing SB resistant varieties through breeding. | CHEN Zongxiang FENG Zhiming KANG Houxiang ZHAO Jianhua CHEN Tianxiao LI Qianqian GONG Hongbing ZHANG Yafang CHEN Xijun PAN Xuebiao LIU Wende WANG Guoliang ZUO Shimin | 2019 | Rice science2019，26，1： | 3 |
| 8 | CSN6 promotes tumorigenesis of gastric cancer by ubiquitin-independent proteasomal degradation of p16INK4a显示文摘Objective: CSN6 is a vital subunit of the constitutive photomorphogenesis 9(COP9) signalosome(CSN), which is responsible for development disorders and promotes ubiquitin-26 S proteasome-dependent degradation in vitro and vivo.Its role in the tumor development of gastric cancer remains unclear.In this study, we investigated the role of CSN6 in gastric cancer progression.Methods: Human gastric cancer samples were collected and immunohistochemistry was performed to identify the role of CSN6 in gastric cancer.The cell proliferation was measured by CCK-8 and the EdU incorporation method.Immunofluorescence localization and a co-immunoprecipitation study were used to show the interaction between the protein CSN6 and p16.Ubiquitination assay was performed to validate whether ubiquitination is involved in CSN6-mediated p16 degradation.BALB/c nude mice were used to produce a tumor model in order to test the effect of CSN6 on cancer growth in vivo.Results: CSN6 expression was dramatically increased in gastric cancer tissues compared with paired adjacent non-tumor tissues and CSN6 was correlated with worse overall and disease-specific survival.Additionally, we also found that CSN6 downregulated p16 protein expression, thereby promoting gastric cancer cell growth and proliferation.Moreover, CSN6 interacted with p16 and a proteasome activator REGγ(PA28γ), thereby facilitating ubiquitin-independent degradation of p16.Conclusions: CSN6 promoted the loss of p16-mediated tumor progression and played an important role in regulating ubiquitin-independent proteasomal degradation of p16. | Wenqi Du Zongxiang Liu Wentao Zhu Tongtong Li Zhiman Zhu Lulu Wei Jun Song Dongsheng Pei | 2019 | Cancer Biology & Medicine2019，16，3： | 2 |
| 9 | Maneuvering tar- get tracking using fuzzy logic-based recursive least squares filter显示文摘 | Fan En Xie Weixin Liu Zongxiang | 2014 | Eurasip Journal on Advances in Sig- nal Processing2014，，： | 1 |
| 10 | OPTIMUM DESIGN OF HIGH-SPEED RAILWAY LOCOMOTIVE TRACTION GEAR显示文摘OPTIMUMDESIGNOFHIGH-SPEEDRAILWAYLOCOMOTIVETRACTIONGEARLiLixing;WangXiuqi;HeWeidong;ZhaoWenzhong;QianYuanmei(DalianRailwayInst... | Li Lixing Wang Xiuqi He Weidong Zhao Wenzhong Qian Yuanmei (Dalian Railway Institute) Liu Youmei Gui Linfang Xiao Peng Pan Xiaoming Xu Zongxiang (Zhuzhou Electric Locomotive Works ) | 1996 | Chinese Journal of Mechanical Engineering1996，9，4： | 1 |
| 11 | Sensory neuron- specific GPCR Mrgprs are itch receptors mediating chloroquine- induced pruritus显示文摘 | LIU Qin TANG Zongxiang SURDENIKOVA L | 2009 | Cell2009，139，7： | 1 |
| 12 | Efficient and Bio-inspired Conversion of Cellulose to Formic Acid Catalyzed by Metalloporphyrins in Alkaline Solution显示文摘 | Qiang Liu Doudou Zhou Zongxiang Li Weiping Luo Cancheng Guo | 2017 | Chinese Journal of Chemistry2017，35，7： | 1 |
| 13 | Study on the glacier variation and its runoff responses in the arid region of Northwest China显示文摘 | Chaohai Liu Ersi Kang Shiyin Liu Jianming Chen Zongxiang Liu | 1999 | Science in China Series D: Earth Sciences1999，，1： | 1 |
| 14 | Track-Oriented Marginal Poisson Multi-Bernoulli Mixture Filter for Extended Target Tracking显示文摘In this paper,we derive and propose a track-oriented marginal Poisson multi-Bernoulli mixture(TO-MPMBM)filter to address the problem that the standard random finite set filters cannot build continuous trajectories for multiple extended targets.First,the Poisson point process model and the multi-Bernoulli mixture(MBM)model are used to establish the set of birth trajectories and the set of existing trajectories,respectively.Second,the proposed filter recursively propagates the marginal association distributions and the Poisson multi-Bernoulli mixture(PMBM)density over the set of alive trajectories.Finally,after pruning and merging process,the trajectories with existence probability greater than the given threshold are extracted as the estimated target trajectories.A comparison of the proposed filter with the existing trajectory filters in two classical scenarios confirms the validity and reliability of the TO-MPMBM filter. | DU Haocui XIE Weixin LIU Zongxiang LI Liangqun | 2023 | Chinese Journal of Electronics2023，32，5： | 0 |
| 15 | New computing method of weighted coefficients for tracking a maneuvering target using PDAF in the presence of clutter显示文摘To avoid or reduce the influence of unpredictable motion mode on data association,a new computing method of weighted coefficients of measurements for PDAF is presented in which it is assumed that the current turn rate of a maneuvering target changes within a limited range and its turn may be in arbitrary direction during data association.Thus,the predicted center for computing the weighted coefficients is a curved surface in 3-D space,which differs from the predicted center for setting up a validation gate,namely,a point in 3-D space.The distance between a measurement and the curved surface is used to compute its weighted coefficient.To reduce the computational complexity of weighted coefficients,the formulas for computing the maneuvering direction angle and turn rate corresponding to a measurement are presented.Simulation results show the proposed method reduces the percentage of lost tracks and improves the state estimation accuracy in tracking a maneuvering target using PDAF in the presence of clutter. | Liu Zongxiang Xie Weixin Huang Jingxiong | 2009 | Journal of Systems Engineering and Electronics2009，20，5： | 0 |
| 16 | Rational design of large anomalous Nernst effect in Dirac semimetals显示文摘Anomalous Nernst effect generates a transverse voltage perpendicular to the temperature gradient.It has several advantages compared with the longitudinal thermoelectricity for energy conversion,such as decoupling of electronic and thermal transports,higher flexibility,and simpler lateral structure.However,a design principle beyond specific materials systems for obtaining a large anomalous Nernst conductivity(ANC)is still absent.In this work,we theoretically demonstrate that a pair of Dirac nodes under a Zeeman field manifests an odd-distributed,double-peak anomalous Hall conductivity curve with respect to the chemical potential and a compensated carrier feature,leading to an enhanced ANC compared with that of a simple Weyl semimetal with two Weyl nodes.Based on first-principles calculations,we then provide two Dirac semimetal candidates,i.e.,Na3Bi and NaTeAu,and show that under a Zeeman field,they exhibit a sizable ANC value of 0.4 Am^(-1)K^(-1) and 1.3 Am^(-1)K^(-1),respectively,near the Fermi level.Such an approach is also applicable to ferromagnetic materials with intrinsic Zeeman splitting,as exemplified by a hypothetical alloy NaFeTe2Au2,exhibiting an ANC as high as 3.7 Am^(-1)K^(-1) at the Fermi level.Our work provides a design principle with a prototype band structure for enhanced ANC pinning at the Fermi level,shedding light on the inverse design of other specific functional materials based on electronic structure. | Panshuo Wang Zongxiang Hu Xiaosong Wu Qihang Liu | 2023 | npj Computational Materials2023，，1： | 0 |
| 17 | A Low Complexity Distributed Multitarget Detection and Tracking Algorithm显示文摘In this paper,we propose a low complexity distributed approach to address the multitarget detection/tracking problem in the presence of noisy and missing data.The proposed approach consists of two components:a distributed flooding scheme for measurements exchanging among sensors and a sampling-based clustering approach for target detection/tracking from the aggregated measurements.The main advantage of the proposed approach over the prevailing Markov-Bayes-based distributed filters is that it does not require any priori information and all the information required is the measurement set from multiple sensors.A comparison of the proposed approach with the available distributed clustering approaches and the cutting edge distributed multi-Bernoulli filters that are modeled with appropriate parameters confirms the effectiveness and the reliability of the proposed approach. | FAN Jiande XIE Weixin LIU Zongxiang | 2023 | Chinese Journal of Electronics2023，32，3： | 0 |
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