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| 1 | Holocene climate change and anthropogenic activity records in Svalbard: a unique perspective based on Chinese research from Ny-?lesund显示文摘Climate change in the Arctic region is more rapid than that in other areas owing to Arctic amplification.To better understand climate change and the driving mechanisms,long-term historical reconstructions throughout the Holocene and high-resolution records of the past few hundred years are required.Intense anthropogenic activities in the Arctic have had a great impact on the local environment.Here,we review the Holocene climate change record,responses of the ecosystems to climate change,and the anthropogenic impacts on the environment based mainly on Chinese research from Ny-?lesund.Climate reconstruction studies from Svalbard have revealed several cold episodes during the Holocene,which are consistent with ice rafting events in the North Atlantic region and glacier activity from Greenland,Iceland,and Svalbard.The ecosystem also showed corresponding responses to climate change,especially during the late Holocene.Over recent decades,anthropogenic activities have caused serious pollution and deterioration to the local environment in Svalbard in areas frequented by people.Greater environmental protection is therefore needed to reduce the anthropogenic impacts on the local environment. | YANG Zhongkang YUAN Linxi WANG Yuhong SUN Liguang | 2017 | Advances in Polar Science2017，28，2： | 2 |
| 2 | PASSIVE LOCATION AND TRACKING USING DOA AND TOA MEASUREMENTS OF SINGLE NONMANEUVERING OBSERVER显示文摘Passive location and tracking (PLAT) of a moving emitter can be implemented by multi-sited observers or by single maneuvering observer using DOA measurements only. In this article, the principle and method of passive location and tracking of a moving emitter by a single non-maneuvering observer using DOA and TOA measurements are presented and described. Computer simulation of PLAT of a moving emitter in two dimensional plane was implemented. It is shown that convergent and accurate tracking data can be obtained. | Zhongkang, Sun Ming, Zhang | 1990 | Chinese Journal of Aeronautics1990，5，1： | 1 |
| 3 | Position location technique and GDOP analysis in multistatic systems显示文摘 | He Lixing Sun Zhongkang | 1991 | Proceedings of CIE1991，4751，： | 1 |
| 4 | Passive Location Using TDOA Information in Multistations显示文摘 | Yang Lin Zhou Yiyu Sun Zhongkang | 1998 | Chinese Journal Of Aeronautics1998，11，1： | 1 |
| 5 | Unbiased Converted Measurements for Target Tracking 显示文摘 | Mo Longbin Song Xiaoquan Zhou Yiyu Sun Zhongkang | 1998 | IEEE Transactions on Aerospace and Electronic Systems (S0018-9251)1998，34，3： | 1 |
| 6 | The developing passive location technology 显示文摘 | Shan Yuehui Sun Zhongkang Huang Fukan | 2002 | Aerospace Electronic War- fare2002，，3： | 1 |
| 7 | A RECURSIVE AND PARALLEL FAST JPDA ALGORITHM显示文摘Joint Probabilistic Data Association (JPDA) is a very fine optimal multitarget tracking and association algorithm in clutter. However, the calculation explosion effect in computation of association probabilities has been a difficulty. This paper will discuss a method based on layered searching construction of association hypothesis events. According to the method, the searching schedule of the association events between two layers can be recursive and with independence, so it can also be implemented in parallel structure. Comparative analysis of the method with relative methods in other references and corresponding computer simulation tests and results are also given in the paper. | Cheng Hongwei Zhou Yiyu Sun Zhongkang(institute of Electronic Engineering, National University of Defense Technology, Hunan Changsha 410073) | 1999 | Journal of Electronics(China)1999，16，4： | 0 |
| 8 | A New Method for Recognizing Point Targets显示文摘ANewMethodforRecognizingPointTargetsLiHong,SunZhongkang&XuHuiInstituteofElectronicEngineering,NationalUniversityofDefenseTech... | Li Hong, Sun Zhongkang & Xu Hui Institute of Electronic Engineering, National University of Defense Technology, Changsha 410073, P. R. China | 1997 | Journal of Systems Engineering and Electronics1997，8，3： | 0 |
| 9 | On the Small SNR Processing Ability of IR Point Target Detection显示文摘: Three-dimensional (3-D) matched filtering has been suggested as a powerful processing technique for detecting weak, moving IR point target immersed in a noisy Held. Based on the theory of the 3-D matched filtering and the optimal linear processing, the optimal point target detector is being analyzed in this paper. The performance of the detector is introduced in detail. The results provide a standard reference to evaluate the performance of any other point target detection algorithms. | Song, Liuping Sun, Zhongkang | 1993 | Journal of Systems Engineering and Electronics1993，4，3： | 0 |
| 10 | Records in palaeo-notch sediment: changes in palaeoproductivity and their link to climate change from Svalbard显示文摘Palaeo-notch sediment, accumulated in lacustrine environment, is a reliable proxy material for palaeoclimatic and palaeoenvironmental research. In this study, we collected a palaeo-notch sediment profile from the Blomstrandhalv?ya, used multiple geochemical proxies to reconstruct palaleoproductivity variations, and investigated their link to climatic records from surrounding regions. C/N atomic ratios and carbon isotope indicate that organic matter in the sediment is mainly derived from lacustrine algae. Toward the surface sediment, the TOC, TN, P contents and the reconstructed palaeoproductivity show remarkable fluctuations with several peaks and troughs, opposite to the variation trend of the CaCO3 contents. Changes in the reconstructed palaeoproductivity are in good agreement with palaeoclimatic records from the surrounding regions, and three interruptions are likely linked to the well-known cooling periods around 1900 BP, 2800 BP and 4200 BP. Thus palaeoproductivity variations on the Blomstrandhalv?ya are mainly driven by climate changes; palaeoproductivity increase during warmer periods, and vice versa. This study will help the research of Arctic lake ecosystem and its response to climate change. | YANG Zhongkang WANG Yuhong SUN Liguang | 2018 | Advances in Polar Science2018，29，4： | 0 |
| 11 | Application of Heterogeneous Multiple Feature Data Fusion to Multitarget Association and Tracking显示文摘In this paper we discuss a kind of multitarget tracking and association method based on the data fusion of heterogeneous multiple feature data gained by a sensor such as space state, signal amplitude, Doppler frequency and so on. In order to introduce quantitatively those heterogeneous multiple feature data which are possibly gailied by a sensor into the discussion of tracking and association problem, we define a correlation measure which we explain as the generalization of conventional association decision. In conventional Nearest Neighbor method, the decision function can take only two values, 1 or 0, to represent the decision of association or not association. In our method, correlation measure can take any real value from 0 to 1 to represent the extent of correlation. Considering the practical circumstances that some feature data might not be easily gained continuously, we introduce an effective factor to deal with these cases. In the paper we also discuss the comparative computer simulation tests and give the results. | Hongwei, Cheng Yiyu, Zhou Zhongkang, Sun | 1998 | Journal of Systems Engineering and Electronics1998，9，3： | 0 |
| 12 | Passive target tracking using marginalized particle filter显示文摘A marginalized particle filtering (MPF) approach is proposed for target tracking under the background of passive measurement.Essentially,the MPF is a combination of particle filtering technique and Kalman filter. By making full use of marginalization,the distributions of the tractable linear part of the total state variables are updated analytically using Kalman filter,and only the lower-dimensional nonlinear state variable needs to be dealt with using particle filter.Simulation studies are performed on an illustrative example,and the results show that the MPF method leads to a significant reduction of the tracking errors when compared with the direct particle implementation.Real data test results also validate the effectiveness of the presented method. | Zhan Ronghui Wang Ling Wan Jianwei Sun Zhongkang | 2007 | Journal of Systems Engineering and Electronics2007，18，3： | 0 |
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