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| 1 | Some properties of the alternating separation (AS), alternating projection (AP) and ASAP algorithm显示文摘This paper analyzes some properties of the alternating separation (AS) and alternating projection (AP) algorithm. The analysis shows that AS converges to the optimal point steadily but slowly, while AP converges to the optimal point quickly but is prone to immersing into the local extreme of the maximum likelihood (ML) criterion. To avoid their disadvantages and make use of their advantages, ASAP, which is the combination of AS and AP, is proposed. Simulation results show that the ASAP algorithm has the ability of estimating the direction of arrival more accurately and converging to optimal point more quickly. | SHAOChao LUGuangyue BAOZheng | 2004 | Science in China(Series F)2004，47，4： | 1 |
| 2 | A NOVEL DIRECTION OF ARRIVAL ESTIMATOR显示文摘A Direction Of Arrival(DOA) estimator based on the signal separation principle is introduced, and one of representative multidimensional estimators is established by introducing Matrix Operator projection signal steering Vector Excision(MOVE) operation. Thanks to Alternating Separation (AS) technique, the multidimensional problem is transformed into a series of one-dimensional optimal ones. Furthermore, an equivalent simplified implementation of the AS is obtained. Finally the definiteness and uniqueness of the estimator are analyzed. | ShaoChao LuGuangyue BaoZheng | 2004 | Journal of Electronics(China)2004，21，2： | 1 |
| 3 | 显示文摘 | SHAOChao WANGChun-hong(邵超 王春红) | 2014 | 模式识别与人工智能2014，27，2： | 1 |
| 4 | Synthesis of halide perovskite microwires via methylammonium cations reaction显示文摘Low-dimensional halide perovskites(HPs)have received considerable attention in recent years due to their novel physical properties such as compositional flexibility,high quantum yield,quantum size effects and superior charge transport.Here we show room temperature solution synthesis of 1D organic-inorganic lead bromide perovskite microwires(MWs).Our method uses acetone as a reactant,and when CH3NH3PbBr3 is immersed,acetone reacts with CH3NH3+cations in the CH3NH3PbBr3 single crystal by the dehydration condensation.The reaction generates a large(CH3)2C=NHCH3+A-site which cannot be accommodated by the cuboctahedron formed by the corner-sharing[PbBr6]4−octahedral,leading to the transition of corner-sharing octahedra to face-sharing triangular prism and the crystal structure transformation from 3D to 1D.The formation process of(CH3)2C=NHCH3PbBr3 MWs does not involve any ligands,templates or catalysts.A two-terminal memory device was constructed using the(CH3)2C=NHCH3PbBr3 MWs,showing great potential of the method in fabrication of electronic and optoelectronic devices. | Wei Wang Jinhui Gong Siyu Guo Lin Jiang Shaochao Liu Li Wang | 2020 | Frontiers of Materials Science2020，14，3： | 0 |
| 5 | Why m〉1 in the FCM Algorithm显示文摘The Fuzzy c-means (FCM) algorithm is one of the most widely used clustering algorithms. It is well known that the weighting exponent m greatly influences the performance of the FCM algorithm. Although it is argued that m can be any value from negative infinityto positive infinity, a popular choice of m in practice still belongs to (1,+∞) or an even more narrow interval. It is commonly supposed that the FCM algorithm does not output the coincident cluster centers. Therefore, the trivial fixed point of the FCM algorithm is expected to be unstable. In this paper, it is proved that the trivial fixed point of the FCM algorithm will be stable with a high probability when m is less than 1. In other words, we present a theoretical explanation why m>1 should hold for the FCM algorithm based on the criterion of stability of the trivial solution of the FCM algorithm. By this new explanation, we also discovered that the choice of the weighting exponent m depended not only on the characteristics of the data set, but also on the structure of the FCM algorithm itself. Our experimental results also supported our theoretical explanation about the weighting exponent m in the FCM algorithms fully. | YUJian SHAOChao LINYoufang HUANGHoukuan | 2005 | Chinese Journal of Electronics2005，14，2： | 0 |
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