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无先兆性偏头痛患者力敏腧穴分布规律及红外特征研究
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作者 喻文 董志威 +5 位作者 李琳慧 廖璐 熊俊 黄彪 章海凤 付勇 《世界中医药》 CAS 北大核心 2024年第8期1159-1162,1167,共5页
目的:观察无先兆性偏头痛(MO)患者和健康受试者力敏腧穴体表分布情况,分析MO患者力敏腧穴分布规律及红外温度特征。方法:选取2019年12月至2022年3月就诊于江西中医药大学附属医院的60例MO患者和60例健康受试者作为研究对象,对120例研究... 目的:观察无先兆性偏头痛(MO)患者和健康受试者力敏腧穴体表分布情况,分析MO患者力敏腧穴分布规律及红外温度特征。方法:选取2019年12月至2022年3月就诊于江西中医药大学附属医院的60例MO患者和60例健康受试者作为研究对象,对120例研究对象进行体表力敏腧穴探查并记录,分析总结MO患者力敏腧穴分布与经脉、神经节段的位置关系;运用红外热成像技术(TTM)观察总结MO患者力敏腧穴红外特征。结果:MO组体表力敏腧穴出现率为88.3%(53/60),健康组为6.67%(4/60,P<0.01)。MO组力敏腧穴主要分布于胆经、肝经以及三焦经,率谷、风池、太冲穴区敏化率较高。MO组力敏腧穴多分布于三叉神经、C_(2)、C_(7)神经节段。力敏腧穴红外温度及部位特征表现为:MO患侧>MO健侧>健康受试者,MO患者颞部、目额部、后头部、前臂外侧、足背部力敏腧穴存在明显不规则热源分布。结论:MO患者力敏腧穴与传统经脉、神经节段位置密切相关,红外温度升高、体表不规则红外热源分布是其重要特征。 展开更多
关键词 无先兆性偏头痛 体表反应点 力敏腧穴 “快然” 传统经脉 神经节段 红外热成像 临床研究
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Fast method for spreading sequence estimation of DSSS signal based on maximum likelihood function 被引量:12
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作者 Yanhua Peng Bin Tang Ming Lv 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2010年第6期948-953,共6页
To estimate the spreading sequence of the direct sequence spread spectrum (DSSS) signal, a fast algorithm based on maximum likelihood function is proposed, and the theoretical derivation of the algorithm is provided. ... To estimate the spreading sequence of the direct sequence spread spectrum (DSSS) signal, a fast algorithm based on maximum likelihood function is proposed, and the theoretical derivation of the algorithm is provided. By simplifying the objective function of maximum likelihood estimation, the algorithm can realize sequence synchronization and sequence estimation via adaptive iteration and sliding window. Since it avoids the correlation matrix computation, the algorithm significantly reduces the storage requirement and the computation complexity. Simulations show that it is a fast convergent algorithm, and can perform well in low signal to noise ratio (SNR). 展开更多
关键词 direct sequence spread spectrum (DSSS) signal spreading sequence maximum likelihood estimation (MLE).
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Production of Rhenium by Transmuting Tungsten Metal in Fast Reactors with Moderator
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作者 Tsugio Yokoyama Yuki Tanoue +1 位作者 Atsunori Terashima Masaki Ozawa 《Journal of Energy and Power Engineering》 2016年第3期159-165,共7页
The feasibility of rhenium (Re) production by irradiating tungsten (W) metal in a medium size fast reactor was evaluated by using a Monte Carlo code. The fast reactor can produce about 50 kilograms of Re per every... The feasibility of rhenium (Re) production by irradiating tungsten (W) metal in a medium size fast reactor was evaluated by using a Monte Carlo code. The fast reactor can produce about 50 kilograms of Re per every 3 years, which corresponds 10% of Japanese domestic production. The specific activity of Re can be reduced below the exemption level or even the natural Re level if W and osmium is separated after the irradiation. The use of ZrD1.7 moderator reduces the specific activity by half compared to that of ZrH1.7 case, and even the no moderator case is permissible to produce the production of Re which has lower specific reactivity than that of natural Re. 展开更多
关键词 RHENIUM TUNGSTEN fast reactor TRANSMUTATION MVP ORIGEN2 specific activity.
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A 10kW-scale Distributed Power Plant of Natural Gas-Proton Exchange Membrane Fuel Cell 被引量:1
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作者 BAO Cheng SU Qingquan +5 位作者 MI Wanliang LI Zhiyuan HI Quan JI Zhonghua LIU Zhixiang MAO Zongqiang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2010年第6期988-994,共7页
A 10 kW-scale natural gas fueled proton exchange membrane fuel cell(PEMFC) distributed power plant is presented in this paper,which is designed for cogeneration of power and heat. With homemade catalysts for CO remova... A 10 kW-scale natural gas fueled proton exchange membrane fuel cell(PEMFC) distributed power plant is presented in this paper,which is designed for cogeneration of power and heat. With homemade catalysts for CO removal in a two-stage methanation process and integrated reactor in the fuel processing system,the reformed fuel with CO molar fraction less than 10-5 is obtained for the fuel cell stack. Based on Matlab/Simulink/Stateflow and xPC Target platform,a rapid control prototype(RCP) is developed for real-time condition management,signal tracking and parameter tuning,data storing,and man-machine interaction. In a typical running with 4.3 kW stack power,the hydrogen production efficiency,gross power generation efficiency and heat recovery efficiency approach to 76%,41% and 50%,respectively. The peak stack power reaches 7.3 kW. Though there is still considerable dis-tance to long-term operation at 10 kW-scale net power generation,it is a milestone for the PEMFC-based stationary application in China. 展开更多
关键词 proton exchange membrane fuel cell natural gas 10kW-scale power plant two-stage methanation xPC-based rapid control prototype
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Fast Texture Segmentation Based on Semi-Local Region Descriptor and Active Contour 被引量:10
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作者 Nawal Houhou Jean-Philippe Thiran Xavier Bresson 《Numerical Mathematics(Theory,Methods and Applications)》 SCIE 2009年第4期445-468,共24页
In this paper, we present an efficient approach for unsupervised segmentation of natural and textural images based on the extraction of image features and a fast active contour segmentation model. We address the probl... In this paper, we present an efficient approach for unsupervised segmentation of natural and textural images based on the extraction of image features and a fast active contour segmentation model. We address the problem of textures where neither the gray-level information nor the boundary information is adequate for object extraction. This is often the case of natural images composed of both homogeneous and textured regions. Because these images cannot be in general directly processed by the gray-level information, we propose a new texture descriptor which intrinsically defines the geometry of textures using semi-local image information and tools from differential geometry. Then, we use the popular Kullback-Leibler distance to design an active contour model which distinguishes the background and textures of interest. The existence of a minimizing solution to the proposed segmentation model is proven. Finally, a texture segmentation algorithm based on the Split-Bregrnan method is introduced to extract meaningful objects in a fast way. Promising synthetic and real-world results for gray-scale and color images are presented. 展开更多
关键词 Semi-local image information Beltrami framework metric tensor active contour Kullback-Leibler distance split-Bregman method.
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Rapid natural resolution of intracranial hematoma 被引量:1
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作者 吴明灿 刘建雄 +4 位作者 罗国才 张志文 闵杰 余辉 姚远 《Chinese Journal of Traumatology》 CAS 2004年第2期96-100,共5页
Objective:To investigate the clinical character istics of intracranial hematoma and the mechanism involved in its rapid natural resolution. Methods:Seventeen cases of intracranial hematoma with typical clinical and CT... Objective:To investigate the clinical character istics of intracranial hematoma and the mechanism involved in its rapid natural resolution. Methods:Seventeen cases of intracranial hematoma with typical clinical and CT manifestations were retrospectively studied. Results:Intracranial hematoma was found obviously decreased in size within 72 h after its occurrence in 8 cases. The rest 9 cases presented co mplete resolution. Conclusions:Rapid natural resolution of acute epidural hematom a is mostly found in teenagers and the resolution is correlated with cranial fra cture at the hematoma site. As for acute subdural hematoma, its rapid resolution is associated with the transfer of cerebrospinal fluid toward subdural space, t he lavage effect, and the compression caused by the increased intracranial press ure or the space left resulting from redistribution of the hematoma in brain atr ophy. 展开更多
关键词 Intracranial hematoma Rapid natural resolution
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C–H bond activation in the total syntheses of natural products 被引量:2
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作者 Pengyu Tao Yanxing Jia 《Science China Chemistry》 SCIE EI CAS CSCD 2016年第9期1109-1125,共17页
The transition metal-mediated C–H bond activation has emerged as a powerful and ideal method for the total syntheses of natural products and pharmaceuticals, and has had a significant impact on synthetic planning and... The transition metal-mediated C–H bond activation has emerged as a powerful and ideal method for the total syntheses of natural products and pharmaceuticals, and has had a significant impact on synthetic planning and strategy in complex natural products.In this review, we describe selected recent examples of the transition metal-mediated C–H bond activation strategies for the rapid syntheses of natural products. 展开更多
关键词 C-H activation transition metal natural product total synthesis
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Take only pictures, leave only...fear? The effects of photography on the West Indian anole Anolis cristatellus 被引量:2
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作者 Brian HUANG Katie LUBARSKY Tiffany TENG Daniel T. BLUMSTEIN 《Current Zoology》 SCIE CAS CSCD 北大核心 2011年第1期77-82,共6页
Ecotourism encourages an environmentally friendly exploration of the world's natural habitats. Tourists often engage in wildlife photography, an activity that is generally not considered disturbing to animals. We inv... Ecotourism encourages an environmentally friendly exploration of the world's natural habitats. Tourists often engage in wildlife photography, an activity that is generally not considered disturbing to animals. We investigated the effects of cam- era-related stimuli to determine whether shutter noise and/or flash affected the immediate behavior of female crested anoles Ano- lis cristaellus. Anoles decreased their display rate following stimuli that included shutter noises, but did not change their behavior in response to flash or silence treatments. To determine the relative importance of this response, we observed anole behavior fol- lowing playbacks of calls from kestrels Falco sparverius, a predator, and bananaquits Coereba flaveola, a non-predator. Anoles decreased display rates following kestrel calls when compared to their response to bananaquit calls. Furthermore, anoles spent a greater proportion of time displaying following bananaquit calls compared to both kestrel calls and silence. The magnitude of response to shutter noises was about the same as that to predator calls. This demonstrates that photography may not be as benign as commonly believed, and we should consider whether restrictions on camera noises should be implemented to reduce ani- mal disturbance 展开更多
关键词 Antipredator Behavior ECOTOURISM PHOTOGRAPHY Anoles Multimodal Risk Assessment
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