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| 1 | A refined coherent point drift(CPD)algorithm for point set registration显示文摘The coherent point drift (CPD) algorithm is a powerful approach for point set registration. However, it suffers from a serious problem-there is a weight parameter w that reflects the assumption about the amount of noise and number of outliers in the Gaussian mixture model, and its value has an influence on the point set registration performance In the original CPD algorithm, the value of w is set manually, and hence an improper value will lead to poor registration results. To solve this problem, a fully automatic algorithm for the selection of an optimal weight parameter is proposed using a hybrid optimization scheme that combines the genetic algorithm with the Nelder-Mead simplex method. The experiments show that the refined CPD algorithm is more effective and extends the original CPD algorithm in its methodology and applications. | WANG Peng WANG Ping QU ZhiGuo GAO YingHui SHEN ZhenKang | 2011 | Science China(Information Sciences)2011，54，12： | 9 |
| 2 | Contour detection improved by frequency domain filtering of gradient image显示文摘We propose an intermediate computational step,frequency domain filtering of gradient image,to improve contour detection performance of gradient-based edge detectors.This step is inspired by analyzing the spectrum distribution of object contours and texture edges in the frequency domain of gradient image.We illustrate the principle and efect of this step by adding it to the Canny edge detector.The resulting operator can selectively retain object contours and region boundaries,and meanwhile can dramatically reduce non-meaningful elements caused by textured background.We use several types of images to compare the proposed method and other related methods qualitatively and quantitatively.Experimental results show that the proposed method can efectively enhance the contour detection of Canny edge detector and achieves similar detection performance to two other related methods but runs faster. | QU ZhiGuo GAO YingHui WANG Ping WANG Peng TAN XianSi SHEN ZhenKang | 2014 | Science China(Information Sciences)2014，57，1： | 2 |
| 3 | Detection of moving small target in IR clutter background containing sea and sky areas显示文摘 | Gao Yinghui Li J icheng Shen Zhenkang | 2005 | SPIE Infrared Components and their Applications2005，5640，： | 1 |
| 4 | Dim-Point Target Detecting From Image Sequences显示文摘 | Li Zhiyong Shen Zhenkang | 1993 | SPIE1993，，： | 1 |
| 5 | Method for searching bridge in IR images显示文摘 | Haixin Chen Zhenkang Shen Jianjun Shen | 1998 | IEEE Aerospace and Electronics Systems Magazine1998，13，7： | 1 |
| 6 | Method for searching bridge in IR images显示文摘 | Chen Haixin Shen Zhenkang Shen Jianjun | | 0，，13： | 1 |
| 7 | Low-temperature Li-S batteries enabled by all amorphous con version process of organosulfur cathode显示文摘The high degree of crystallinity of discharging in termediates of Li-S batteries(Li_(2)S_(2)/Li_(2)S)causes a severe capacity attenuation at low temperatures.Herein,a sulfur-rich polymer is fabricated,which enables all the discharging in termediates to exist in an amorphous state without long-range order,promoti ng the substantial conversion of discharging intermediates and enhancing Li-S batteries'performance at low temperatures greatly.This cathode material exhibits excellent performance both at room and low temperatures.Even under an extremely low temperature(-40℃),the discharge capacity can remain 67% of that at room temperature.Besides,in-situ UV/Vis spectroscopy and density functional theory calculations reveal that this organosulfur cathode undergoes a new mechanism during discharge.Li_(2)S_(6) and Li_(2)S_(3) are the primary discharging intermediates that are quite different from conventional Li-S batteries.These results provide a new directi on for a broader range of applications of Li-S batteries. | Zhenkang Wang Xiaowei Shen Sijie Li Yuxuan Wu Tingzhou Yang Jie Liu Tao Qian Chenglin Yan | 2022 | Journal of Energy Chemistry2022，31，1： | 1 |
| 8 | Meth- od for Searching Bridge in IR Images 显示文摘 | Chen Haixin Shen Zhenkang Shen Jianjun | 1998 | IEEE Aerospace and Electronics Systems Magazine1998，13，7： | 1 |
| 9 | High electrocaloric cooling power of relaxor ferroelectric BaZr_xTi_(1–x)O_3 ceramics within broad temperature range显示文摘Electrocaloric effect(ECE) is much promising to realize high efficiency and environment friendly solution in solid cooling devices. Relaxor ferroelectrics are good candidates for the materials with high electrocaloric cooling power. In this paper, relaxor ferroelectric Ba(Zr_xTi_(1–x))O_3(BZT, x = 0.2, 0.21, 0.22, 0.23)ceramics were prepared with their temperature change(DT) induced by the ECE and electrocaloric strength(DT/E) measured within broad temperature range. It is found that the BZT21(x = 0.21) exhibits the largest DT of $4.67 K and a high DT/E value of $0.46 km/MV at 9.9 MV/m and 25 °C. BZT21 also exhibits apparent relaxor ferroelectric response, showing a very broad EC peak in the temperature interval between 15 °C and 50 °C. Moreover, the relationship between EC properties and relaxor features was analyzed by piezoresponse force microscopy test. The results reveal that more dispersed phase structures induce additional configurational entropy, which is in favor for the enhanced EC performance. The interplay and compromise between the kinetic and thermodynamic mechanisms of domain switching determines the optimal composition for the EC performances of the BZT ceramics. | Jianfeng Qian Penghao Hu Chen Liu Jianyong Jiang Zhenkang Dan Jing Ma Yuanhua Lin Ce-Wen Nan Yang Shen | 2018 | Science Bulletin2018，63，6： | 0 |
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