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排序方式: 共有3478条查询结果,搜索用时 15 毫秒
241.
Mandeep M. Sahani Tarek M. Daoud Ramin Sam Jerry Andrews Yuk Lun Cheng Carl M. Kjellstrand Todd S. Ing 《Hemodialysis international. International Symposium on Home Hemodialysis》2001,5(1):92-96
An aggressive dialysis in a grossly azotemic patient, especially one with severe metabolic acidosis, can lead to dialysis disequilibrium syndrome (DDS). Mild forms present as nausea, vomiting, restlessness, and headache. Severe manifestations include seizures, obtundation, coma, and even death. This clinical picture is caused by cerebral edema induced by one or more of the following mechanisms:
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242.
传感器网(WSN)综合了传感器技术、嵌入式计算技术、通信技术等,在人无法或很难到达的地方具有很高的利用价值。传感器网络能够应用于军事和民用方面,然而传感器网络中的节点数量众多,体积小,能量受限,因此如何降低节点的能量消耗。延长网络的寿命显的极为重要。文章介绍了传感器网络的结构,总结了传感器网络中的节能算法和协议,并提出了今后发展的方向。 相似文献
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Agent-based simulation has been a popular technique in modeling and analyzing electricity markets in recent years. The main
objective of this paper is to study existing agent-based simulation packages for electricity markets. We first provide an
overview of electricity markets and briefly introduce the agent-based simulation technique. We then investigate several general-purpose
agent-based simulation tools. Next, we review four popular agent-based simulation packages developed for electricity markets
and several agent-based simulation models reported in the literature. We compare all the reviewed packages and models and
identify their common features and design issues. Based on the study, we describe an agent-based simulation framework for
electricity markets to facilitate the development of future models for electricity markets. 相似文献
245.
传感器网络(WSN)综合了传感器技术、嵌入式计算技术、通信技术等,在人无法或很难到达的地方具有很高的利用价值。传感器网络能够应用于军事和民用方面,然而传感器网络中的节点数量众多,体积小,能量受限,因此如何降低节点的能量消耗,延长网络的寿命显的极为重要。文章介绍了传感器网络的结构,总结了传感器网络中的节能算法和协议,并提出了今后发展的方向。 相似文献
246.
The present research examined (a) the link between personal history of residential mobility and the self-concept and (b) the implications of such a link for positive affect in social interactions. Study 1 showed that the personal self was more central to the self-definition of frequent movers than to that of nonmovers, whereas the collective self was more central to the self-definition of nonmovers than to that of frequent movers. Results from a laboratory and a 2-week event sampling study (Studies 2 and 3) demonstrated that frequent movers felt happier when an interaction partner accurately perceived their personal selves, whereas nonmovers felt happier when a partner accurately perceived their collective selves. These findings present the first direct evidence on how personal history of residential mobility is linked to important individual differences in the self and positive affect in social interactions. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
247.
A novel autofocus algorithm for synthetic aperture radar (SAR) based on total variation is presented in this paper. The method,
which starts with a complex phasedegraded SAR image, after the phase errors model is introduced into the range-compressed
phase-history domain, carries out phase errors correction by changing the focus till the total variation of the azimuth profile
is maximized. Compared with the minimum entropy autofocus algorithm, the autofocus algorithm has less computational complexity
and is easier to implement. The simulation and the processing results of the measured data show the validity of the proposed
method.
Translated from Journal of Xidian University, 2006, 33(2): 167–172 [译自: 西安电子科技大学学报] 相似文献
248.
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250.
Reconfigurable Microwave Photonic Filter Using Multiwavelength Erbium-Doped Fiber Laser 总被引:1,自引:0,他引:1
Xinhuan Feng C. Lu H.Y. Tam P.K.A. Wai 《Photonics Technology Letters, IEEE》2007,19(17):1334-1336
A microwave photonic filter using a simple and novel multiwavelength erbium-doped fiber laser (EDFL) is proposed. The filter was experimentally demonstrated featuring tunability and reconfigurability by adjustment of the output from the EDFL. The experimental results show excellent agreement with the numerical simulations. 相似文献