排序方式： 共有5条查询结果，搜索用时 15 毫秒
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Xier Luo Yu Zhou Bing Zhang Yi Zhang Xiaobo Wang Tong Feng Zhipeng Li Kuiqing Cui Zhiqiang Wang Chan Luo Hui Li Yanfei Deng Fenghua Lu Jianlin Han Yongwang Miao Huaming Mao Xiaoyan Yi Cheng Ai Shigang Wu Alun Li Zhichao Wu Zijun Zhuo Do Da Giang Bikash Mitra Mohammad Farhad Vahidi Shahid Mansoor Sahar Ahmed Al-Bayatti Eka Meutia Sari Neena Amatya Gorkhali Sigit Prastowo Laiba Shafique Guoyou Ye Qian Qian Baoshan Chen Deshun Shi Jue Ruan Qingyou Liu 《国家科学评论(英文版)》2020,7(3):686
Domesticated buffaloes have been integral to rice-paddy agro-ecosystems for millennia, yet relatively little is known about the buffalo genomics. Here, we sequenced and assembled reference genomes for both swamp and river buffaloes and we re-sequenced 230 individuals (132 swamp buffaloes and 98 river buffaloes) sampled from across Asia and Europe. Beyond the many actionable insights that our study revealed about the domestication, basic physiology and breeding of buffalo, we made the striking discovery that the divergent domestication traits between swamp and river buffaloes can be explained with recent selections of genes on social behavior, digestion metabolism, strengths and milk production. 相似文献
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Amer M. Magableh Osamah S. Badarneh Imran Shafique Ansari Taimour Aldalgamouni 《Journal of The Franklin Institute》2018,355(14):6877-6888
Transmit antenna selection with maximal ratio combining at the receiver (TAS/MRC) is a promising technique that can be used to avoid the hardware complexity of multiple input multiple output (MIMO) system without jeopardizing the diversity gain. The generalized Gaussian distribution (GGD) is used to model different kinds of additive noise including Gaussian, Laplacian, uniform, and impulsive. In this paper, we study the bit error performance of TAS/MRC system assuming flat Rayleigh fading channels perturbed by additive white generalized Gaussian noise (AWGGN). To this end, we provide a closed form expression for the average bit error rate of coherent modulation techniques in terms of Mejier’s G function that is readily available in many commercial mathematical software packages like MATLAB and Mathematica. Moreover, we study the asymptotic behavior of the BER at high signal to noise ratio (SNR). Analytical results are verified by simulation. 相似文献
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The study reviews the important role of information systems and their impact on educational planning and development. It also attempts to identify gaps in the provision of information needed by educational administrators who are key planners of education enterprise in Pakistan. It intended to determine their views about the development, objectives and needed services of a user centered information system for educational administrators. To achieve these objectives, a literature review, questionnaire survey and interviews were conducted. Thus, the educational administrators (i.e., registrars/deans/chairpersons in universities and principals of schools and colleges) were identified as the target population for the survey and were selected through cluster sampling. The respondents were from the Punjab province and Islamabad Capital Territory. In total, 297 (99%) responses were received and analyzed quantitatively. Interviews of purposively selected educational administrators were also conducted for a more in-depth understanding of respondents’ points of view. This triangulation of qualitative and quantitative methods helped in understanding the phenomena under study. Recommendations and conclusions are also drawn in the light of findings of the study. The study is the first one of its type that tried to probe the gaps in the process of accurate/valid information supply to educational administrators and planners. This gap is causing serious challenges for education in Pakistan. 相似文献
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The study reviews the important role of information systems and their impact on educational planning and development. It also attempts to identify gaps in the provision of information needed by educational administrators who are key planners of education enterprise in Pakistan. It intended to determine their views about the development, objectives and needed services of a user centered information system for educational administrators. To achieve these objectives, a literature review, questionnaire survey and interviews were conducted. Thus, the educational administrators (i.e., registrars/deans/chairpersons in universities and principals of schools and colleges) were identified as the target population for the survey and were selected through cluster sampling. The respondents were from the Punjab province and Islamabad Capital Territory. In total, 297 (99%) responses were received and analyzed quantitatively. Interviews of purposively selected educational administrators were also conducted for a more in-depth understanding of respondents’ points of view. This triangulation of qualitative and quantitative methods helped in understanding the phenomena under study. Recommendations and conclusions are also drawn in the light of findings of the study. The study is the first one of its type that tried to probe the gaps in the process of accurate/valid information supply to educational administrators and planners. This gap is causing serious challenges for education in Pakistan. 相似文献
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This study is qualitative in nature and aims at assessing the information needs and seeking behavior of educational administrators and finding related problems. Interviews of a purposive sample and review of related literature are among the major research methods. The study is based on interviews of 13 educational administrators and 32 information professionals from Punjab province and Islamabad Capital Territory (ICT) of Pakistan. The results correspond with the previous studies conducted in other countries. The educational administrators' information needs and seeking behavior reflect a kinship with their work settings and information environment that highlights a need to understand problem situations as an ancestor to understanding how they seek and use information. The study has identified a gap in the provision of needed information which hinders the realistic planning and decision making process. It has also highlighted the need of a National Information System for educational administrators in Pakistan. As this is the first study on this topic in Pakistan, the results can be useful to design information services and facilities for educational administrators in Pakistan and other developing regions of the globe with similar conditions. 相似文献
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