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流体中大直径支撑架的井壁壁厚研究

油气田地面工程 2009年第7期28卷 12-13页

作者：李卫峰渤海石油职业学院

井壁力学稳定性的相对强度主要取决于井壁或近井壁带岩石的强度,其承受附加流体应力的大小可通过公式计算。本文作者从支撑架所受静压及动压状况下入手,对支撑架所受的静压和动压进行详细的分析。通过试验和计算公式得出,当直径为4m、长... 详细信息

井壁力学稳定性的相对强度主要取决于井壁或近井壁带岩石的强度,其承受附加流体应力的大小可通过公式计算。本文作者从支撑架所受静压及动压状况下入手,对支撑架所受的静压和动压进行详细的分析。通过试验和计算公式得出,当直径为4m、长150m的大直径支撑架若想保证其稳定性,壁厚应设计成52mm以上。

关键词：流体储层直径井壁壁厚

Modified Adaptive Weighted Averaging Filtering Algorithm for Noisy Image Sequences

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Transactions of Tianjin University 2007年第2期13卷 103-106页

作者：李伟锋郁道银陈晓冬 School of Precision Instrument and Opto-Electronics Engineering Tianjin University

In order to avoid the influence of noise variance on the filtering performances, a modified adaptive weighted averaging (MAWA) filtering algorithm is proposed for noisy image sequences. Based upon adaptive weighted averaging pixel values in consecutive frames, this algorithm achieves the filtering goal by assigning smaller weights to the pixels with inappropriate estimated motion trajectory for noise. It only utilizes the intensity of pixels to suppress noise and accordingly is independent of noise variance. To evaluate the performance of the proposed filtering algorithm, its mean square error and percentage of preserved edge points were compared with those of traditional adaptive weighted averaging and non-adaptive mean filtering algorithms under different noise variances. Relevant results show that the MAWA filtering algorithm can preserve image structures and edges under motion after attenuating noise, and thus may be used in image sequence filtering.

关键词： adaptive weighted averaging image sequences motion trajectory noise variance

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红鳍笛鲷肌肉营养成分分析

海洋湖沼通报 2016年第6期 67-72页

作者：陈涛李伟峰广西北部湾海洋生物多样性养护重点实验室(钦州学院) 广西钦州535000 南宁学院科研处广西南宁530200

为评价红鳍笛鲷(lutjanus erythopterus)肌肉营养价值,使用国标方法测定分析了红鳍笛鲷肌肉营养成分。结果表明:红鳍笛鲷肌肉中粗蛋白、粗脂肪、粗灰分和水分分别为18.60%、0.18%、1.58%和79.80%,属于高蛋白、低脂肪鱼类。肌肉中含有18... 详细信息

为评价红鳍笛鲷(lutjanus erythopterus)肌肉营养价值,使用国标方法测定分析了红鳍笛鲷肌肉营养成分。结果表明:红鳍笛鲷肌肉中粗蛋白、粗脂肪、粗灰分和水分分别为18.60%、0.18%、1.58%和79.80%,属于高蛋白、低脂肪鱼类。肌肉中含有18种氨基酸,氨基酸总量为13.82%(鲜样),其中8种人体必需氨基酸总量为5.90%(鲜样),必需氨基酸占氨基酸总量的比值(WEAA/WTAA)为42.69%,必需氨基酸占非必需氨基酸的比值(WEAA/WNEAA)为74.49%,CS、AAS及EAAI(63.96)均较高;红鳍笛鲷的第一限制性氨基酸为缬氨酸,第二限制性氨基酸为苏氨酸或蛋氨酸+胱氨酸。肌肉中4种金属元素含量低于其他几种经济鱼类。红鳍笛鲷必需氨基酸的组成达到了FAO/WHO的标准,符合全鸡蛋蛋白模式。

关键词：红鳍笛鲷肌肉营养成分

国标《土工布及其相关产品平面内水流量测定》的制定与应用

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产业用纺织品 2005年第12期23卷 36-38页

作者：李伟锋中原工学院电气工程系郑州450007

介绍了土工布及其相关产品平面水流量测定的国标制定情况,叙述了该标准内容、指标等的主要确定依据,并对标准的应用情况进行了说明,以期标准的使用者能正确理解。

关键词：土工布平面内水流量测试国家标准制定应用

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原发性肝淋巴瘤伴贫血和低蛋白血症1例报告

临床肝胆病杂志 2021年第8期37卷 1911-1913页

作者：李伟锋吴帆暨南大学附属广州红十字会医院肝胆外科广州510220

原发性肝淋巴瘤(primary hepatic lymphoma,PHL)发病率低,约占肝脏恶性肿瘤的0.1%,占非霍奇金淋巴瘤的0.016%,占结外淋巴瘤的0.4%[1]。因此临床上对该病的认识不足,常常导致诊断困难甚至误诊。现对1例PHL患者进行报道,以提高对该病的认识。

关键词：淋巴瘤,非霍奇金贫血低蛋白血症

Depositional Environment and Origin of Inertinite-rich Coal in the Ordos Basin

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Acta Geologica Sinica(English Edition) 2024年第4期98卷 1064-1085页

作者： SHI Qingmin ZHAO Jun JI Ruijun XUE weifeng HAN Bo CAI Yue li Chunhao CUI Shidong College of Geology and Environment Xi’an University of Science and TechnologyXi’an 710054China Shaanxi Coal Chemical Industry Technology Research Institute Co. Ltd.Xi’an 710199China China National Logging Corporation Geological Research InstituteXi’an 710077China

Inertinite-rich coal is widely distributed in the Ordos Basin,represented by the No.2 coal seam of the Middle Jurassic Yan'an *** paper combined coal petrology and geochemistry to analyze the origin of inertinite,changes in the coal-forming environment and control characteristics of *** has shown that there are two forms of inertinite sources in the study *** typical fusinization,wildfire events also play a substantial role in inertinite *** are significant fluctuations in the coal-forming environment of samples at different *** samples were formed in dry forest swamp with low water levels and strong oxidation,which have a high inertinite content,and the samples formed in wet forest swamp and limnic showed low inertinite ***,the inertinite content of different origins does not fully correspond to the depositional environment characterized by dryness and *** inertinites were significantly influenced by climatic conditions,while pyrofusinite was not entirely controlled by climatic conditions but rather directly impacted by wildfire *** high oxygen level was the main factor causing widespread wildfire ***,the combination of wildfire activity and oxidation generates a high content of inertinite in the Middle Jurassic coal of the Ordos Basin.

关键词： inertinite-rich coal wildfire coal petrology geochemistry biomarkers depositional environment

库车坳陷白垩系砂岩储层石英溶蚀非均质性特征及其主控因素

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地质学报 2011年第2期85卷 256-261页

作者：韩登林李忠李维锋长江大学油气资源与勘探技术教育部重点实验室湖北荆州434023 长江大学地球科学学院湖北荆州434023 中国科学院地质与地球物理研究所北京100029

库车坳陷白垩系巴什基奇克组砂岩储层内石英颗粒溶蚀作用较发育,溶蚀主要发育在颗粒内部或颗粒边缘。储层内石英颗粒的溶蚀效应呈现出明显的平面非均质性特征,溶蚀增孔量高值区的储层内不仅在胶结物上富集方沸石胶结物,在粘土矿物组合... 详细信息

库车坳陷白垩系巴什基奇克组砂岩储层内石英颗粒溶蚀作用较发育,溶蚀主要发育在颗粒内部或颗粒边缘。储层内石英颗粒的溶蚀效应呈现出明显的平面非均质性特征,溶蚀增孔量高值区的储层内不仅在胶结物上富集方沸石胶结物,在粘土矿物组合上也表现出富伊利石贫高岭石的特征。通过层间泥岩硼元素含量的测定,对研究层段同沉积地层水体盐度进行恢复,其平面分布规律与石英颗粒溶蚀效应的非均质性特征基本一致,表明同沉积水体的盐度是储层内石英溶蚀非均质性特征的主控因素。

关键词：库车坳陷成岩作用石英溶蚀作用同沉积地层水

Cellular automata pedestrian movement model considering human behavior

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Chinese Science Bulletin 2003年第16期48卷 1695-1699页

作者： YANG lizhong, FANG weifeng, li Jian, HUANG Rui & FAN Weicheng State Key Laboratory of Fire Science, University of Science and Tech-nology of China, Hefei 230026, China Correspondence should be addressed to Yang lizhong (e-mail:zxd@ustc. ***) State Key Laboratory of Fire Science University of Science and Technology of China Hefei China

The pedestrian movement is more complex than vehicular flow for the reason that people are more flexible and intelligent than car. Without the limit of 搇anes?pedestrian movement is loose and free. Furthermore, they are easily affected by other walkers as well as the environ-ment around. In this paper some special technique is intro-duced considering human behavior to make the rules more reasonable. By simulating the two-dimension pedestrian movement, the phase transition phenomena of pedestrian movement, including the up walkers moving from the bottom to the upper boundary and the right walkers moving from the left to the right boundary, are presented. Studying on the effect of the system size on the critical density shows that the critical density is independent of the system size in the scope studied in this paper.

关键词：人类行为步行运动二维空间二维模型机器人步行模拟基本原理智能化相位转换

GFRP增强方钢管再生块体混凝土柱的受剪性能试验研究

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建筑结构学报 2020年第12期41卷 28-37,63页

作者：金和卯赵新宇李卫峰华南理工大学亚热带建筑科学国家重点实验室广东广州510641 中国建筑第五工程局有限公司深圳分公司广东深圳518054

对再生块体混凝土构件施加外部约束是提高其受力性能的有效途径,通过13根方钢管再生块体混凝土柱试件与10根GFRP增强方钢管再生块体混凝土柱试件的受剪性能试验,考察了废旧混凝土块体取代率、剪跨比、轴压比及环向GFRP层数等参数对试件... 详细信息

对再生块体混凝土构件施加外部约束是提高其受力性能的有效途径,通过13根方钢管再生块体混凝土柱试件与10根GFRP增强方钢管再生块体混凝土柱试件的受剪性能试验,考察了废旧混凝土块体取代率、剪跨比、轴压比及环向GFRP层数等参数对试件横向剪力-变形曲线与受剪承载力的影响,检验了采用现有设计公式预测试件受剪承载力的有效性。研究表明:方钢管再生块体混凝土柱及GFRP增强方钢管再生块体混凝土柱的受剪性能受剪跨比和轴压比的影响较大,其横向剪力-变形曲线随上述两参数变化呈现3种典型形态;当废旧混凝土块体取代率低于35%且新、旧混凝土强度差不超过15 MPa时,再生块体对柱受剪性能的影响总体较小;剪跨比不大于0.5时环向粘贴单层GFRP布对柱受剪承载力的提升无明显效果,而双层GFRP布可小幅提高柱的受剪承载力;相比现有钢管混凝土柱受剪承载力计算公式,所提计算式可较好地预测方钢管及GFRP增强方钢管再生块体混凝土柱的受剪承载力。

关键词：方钢管混凝土柱再生块体混凝土 GFRP 受剪试验受剪性能