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	BIRD plus : Design of a Lightweight Communication Compressor for Resource-Constrained Distribution Learning Platforms 期刊论文 OAI收割 IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS, 2024, 卷号: 35, 期号: 11, 页码: 2193-2207 作者: Wu, Donglei; Yang, Weihao; Zou, Xiangyu; Feng, Hao; Tao, Dingwen \| 收藏 \| 浏览/下载：9/0 \| 提交时间：2024/12/06 Indexes Costs Computational modeling Distance learning Computer aided instruction Training Tensors Distributed learning communication compression random sampling neural network
	Effects of the sampling spacing on the spatial variability in soil organic carbon, total nitrogen, and total phosphorus across a semiarid watershed 期刊论文 OAI收割 ARCHIVES OF AGRONOMY AND SOIL SCIENCE, 2020, 页码: 16 作者: Zhang, Pingping; Wang, Yunqiang; Zhang, Xingchang \| 收藏 \| 浏览/下载：29/0 \| 提交时间：2021/03/18 Geostatistics maximum sampling distance sampling strategy scale spatial heterogeneity
	Effects of the sampling spacing on the spatial variability in soil organic carbon, total nitrogen, and total phosphorus across a semiarid watershed 期刊论文 OAI收割 ARCHIVES OF AGRONOMY AND SOIL SCIENCE, 2020, 页码: 16 作者: Zhang, Pingping; Wang, Yunqiang; Zhang, Xingchang \| 收藏 \| 浏览/下载：33/0 \| 提交时间：2020/12/23 Geostatistics maximum sampling distance sampling strategy scale spatial heterogeneity
	Detecting spatial aggregation from distance sampling: a probability distribution model of nearest neighbor distance 期刊论文 OAI收割 ECOLOGICAL RESEARCH, 2013, 卷号: 28, 期号: 3, 页码: 397-405 作者: Gao, Meng \| 收藏 \| 浏览/下载：24/0 \| 提交时间：2013/08/15 Spatial Point Pattern Negative Binomial Distance Sampling Barro Colorado Island Panama
	A design of beam shaping unit for 193nm lithography illumination system using angular spectrum theory (EI CONFERENCE) 会议论文 OAI收割 6th International Symposium on Precision Engineering Measurements and Instrumentation, August 8, 2010 - August 11, 2010, Hangzhou, China 作者: Zhao Y.; Zhang W.; Zhang W.; Li S.; Gong Y. 收藏 \| 浏览/下载：20/0 \| 提交时间：2013/03/25 Off-axis illumination (OAI) technology is widely used to enhance resolution for deep ultraviolet lithography. The realizing methods of OAI include geometrical optics method and physical optics method. However the former has the disadvantage of weak intensity distribution controlling ability and the latter introduces simulation errors evidently when dealing with near field diffraction propagation. A diffractive optical element (DOE) designing method using plane wave angular spectrum theory is presented in this paper. Several kinds of OAI modes at near field away from DOE can be realized and simulation errors and the size of illuminator are also reduced. According to studying the relationships of the sampling point distance of DOE light beam propagation distance and the structure of the beam shaping unit a method of determining the designing parameters is discussed. Using this method several illumination modes are realized and simulation results show that all diffraction efficiencies reach up to 84%. The method of DOE manufacturing is analyzed at last and it is proven to be feasible. 2010 SPIE.
	Game Vertebrate Densities in Hunted and Nonhunted Forest Sites in Manu National Park, Peru 期刊论文 OAI收割 BIOTROPICA, 2010, 卷号: 42, 期号: 2, 页码: 251-261 作者: Endo W; Peres CA; Salas E; Mori S; Sanchez-Vega JL 收藏 \| 浏览/下载：32/0 \| 提交时间：2010/08/24 bushmeat defaunation distance sampling forest vertebrates hunting indigenous people Manu National Park trophic cascade
	A high-accuracy parameter estimation algorithm for jointless Frequency-shift track circuit (EI CONFERENCE) 会议论文 OAI收割 ISECS International Colloquium on Computing, Communication, Control, and Management, CCCM 2008, August 3, 2008 - August 4, 2008, Guangzhou, China 作者: Zheng X. 收藏 \| 浏览/下载：29/0 \| 提交时间：2013/03/25 FSK (Frequency Shift keying) signal which has advantages of narrow-bandwidth strong anti-interference ability long transmission distance and so on is used in jointless Frequency-shift track circuit to send different kinds of control signals. However as FSK is non-linearly modulated parameter estimation with high accuracy is hard to realize. Based on the spectrum analysis complement with time-frequency distribution a highaccuracy FSK signal parameter estimation algorithm is put forward in this paper. According to the signal characteristics under-sampling and ZFFT are used to improve the accuracy of spectrum analysis and the base frequency resolution meets system requirement of 0.02Hz. Wigner-Ville distribution has an excellent time-frequency concentration while serious cross-term interference at the same time. Through the design of kernel function the cross-terms are almost suppressed and the upper/down side frequency resolution meets the system requirement of 0.2Hz. The effectivities of all the methods mentioned above have been proved by MATLAB simulation which pave a solid way for the development of high-accuracy FSK signal parameter estimation devices. 2008 IEEE.