川南地区页岩气民营化发展调查     

杨红伟  高德  罗自力  刘勇  郑杰  谢启艳 《宜宾学院学报》2014,14(6):62-65

针对我国首个居民使用页岩气镇——宜宾市珙县上罗镇,通过走访、问卷调查、咨询专家及现场考察方式,主要从市场、需求、价格、影响因素等方面进行调查;分析并提出对页岩气开采应减少水资源污染、提供能源补贴,鼓励使用新型能源并积极推进页岩气民营化的进度.  相似文献   

600MW机组对冲燃烧锅炉运行问题分析及解决     

潘存华  彭荣  李德 《巢湖学院学报》2014,(6):104-107

针对某电厂600MW对冲燃烧型锅炉运行出现的问题,理论分析结合试验调整,解决运行出现的问题。结果表明:减小磨煤机分离器挡板开度及燃尽风的旋流强度有助于煤粉在炉内的燃烬;合理的提高运行氧量,可以减少炉膛出口CO数值;调平一次风风速、减小炉内温度场偏差及降低炉膛出口烟气温度可以降低过热器、再热器管壁温度,有效解决管壁超温现象。  相似文献   

改变音乐节拍对脑电功率谱变异的影响及其心理意义     

张德乾  刘健  林梦 《绵阳师范学院学报》2014,(2):56-62

目的旨在探索音乐节拍对大脑活动主要区域信息加工过程中的脑电波谱变异.方法采用自编的音乐播放软件给被试分别播放(42、65、120 BPM)3种音乐节拍的65 dB音乐,每种节拍曲目播放5 min,并采集16脑区的脑电信号进行离线分析.结果 (1)与安静状态相比播放音乐时被试在7个波段的脑电波谱功率显著降低;播放音乐时脑电波谱重心频率向低频段移动,表明疲劳程度增加;(2)改变音乐节拍显著降低α1波频段的功率而增加α2波频段的功率;(3)从频段功率占比看,加快音乐节拍节奏增加高频段脑电波活动,降低节拍节奏增加低频段活动而降低高频段脑电波活动.结论音乐节拍显著影响脑电波谱功率变异,65 BPM的中等节奏音乐有利于注意力集中和放松休息,120 BPM快节奏音乐有利于激活唤醒水平,加快运动,改变音乐节拍增加注意负荷,消耗更多的心理加工资源,其意义有待于进一步探索.  相似文献   

技能类运动竞赛裁判员评分合理性评价方法研究   总被引：9，自引：0，他引：9  

陈志强  卢芬  杨德芳 《中国体育科技》2001,37(8):23-25

本研究依据定量的评价方法，对技能类运动竞赛裁判员在执行裁判中主观评分的公正性、合理性进行优劣排序评价，以期裁判员在执行裁判中进一步做到公正、准确。  相似文献   

注重物理科学方法教育,培养学生创造能力     

岳德才 《济宁师范专科学校学报》2006,27(3):90-91

物理科学方法教育有利于学生能力的培养,科学世界观的形成,以及对物理知识的掌握和对物理规律的认识。而物理科学方法教育要以物理实验为基础,结合物理概念、规律和物理学史进行方法教育。  相似文献   

Modelling and analysis of a basilica under earthquake loading   总被引：1，自引：0，他引：1  

E. Mele  A. De Luca  A. Giordano 《Journal of Cultural Heritage》2003,4(4):355-367

In this paper a basilica-type church is analysed in order to assess its structural behaviour and seismic vulnerability. For this purpose, an effective two-step procedure has been used, consisting of: (a) 3D static and dynamic linear analyses of the structural complex, and (b) 2D nonlinear push-over analysis of the single macro-elements. The results obtained through push-over analyses have been compared to the collapse loads derived from limit analysis, proving the ability of finite element (F.E.) nonlinear model to provide reliable simulation of the actual response of masonry elements. Then, the strength demand on each single structural macro-elements, resulting from the 3D linear analyses, has been compared to the macro-element ultimate strength capacity. The comparison demand vs. capacity has been carried out for all transversal and longitudinal macro-elements of the church, allowing a direct, though approximate, assessment of the seismic safety level of the church. The comparison demand vs. capacity confirms the susceptibility of this type of buildings to extensive damage and possibly to collapse, as frequently observed. The insertion of rigid diaphragms, which represents a widely used retrofit technique, has also been investigated; such intervention triggers concentration of strength demand in the stiffest macro-elements, so that the seismic capacity of the building is not necessarily increased.  相似文献   

The Democratization of Travel: The Travel Agent in American History     

Hugh De Santis 《Journal of American culture (Malden, Mass. : 2003)》1978,1(1):1-17

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Software     

Carol J. De Vita 《Archives and Museum Informatics》1993,7(4):24-26

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The universities and the government in Sri Lanka   总被引：1，自引：0，他引：1  

Kingsley De Silva 《Minerva》1978,16(2):251-272

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Incidence and risk for traumatic and overuse injuries in top-level road cyclists     

De Bernardo N  Barrios C  Vera P  Laíz C  Hadala M 《Journal of sports sciences》2012,30(10):1047-1053

All traumatic and overuse injuries occurring during an average period of 4 years (2002/09) in a group of 51 currently active road top-level cyclists were retrospectively registered through clinical interviews. Average age was 25.8 years. Average training and competition period was 28.3 ± 2.4 h a week. Only 8 cyclists (15.6%) were completely free from lesions during the period of study. The remaining 43 cyclists suffered a total of 112 lesions; however, 9 out of these were unrelated to their cycling practice. These 103 cycling-related injuries include 50 (48.5%) traumatic and 53 (51.5%) overuse injuries. Twenty-eight fractures were reported, the clavicle being the most frequently affected bone (11 cases). The 68.5% of overuse injuries were located in the lower limbs. Most overuse injuries (89.6%) occurred during the training period. According to the injury abbreviated scale (AIS), severe lesions were only found in 4 cases (8% of traumatic injuries). Overall injury rates were 0.50 per racer/year, 2.02 per studied racer, and 0.007 per 1000 km of training and competition. Active professional top-level cyclists are exposed to a high injury risk. According to the scarce previously published data the current study provides relevant information on the injury occurrence of still active top-level road cycling.  相似文献