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199篇 您的检索式:作者名="Dwayne"
    题名 作者 年代 出处 被引量
1深凹露天转地下开采高陡边坡变形与破坏规律显示文摘以大冶铁矿为工程背景,采用相似材料模型实验和数值模拟计算相结合的方法,对深凹露天转地下开采高陡边坡的变形和破坏规律进行了系统研究.首先,模型相似实验中,采用百分表、压力传感器和近景摄影测量等手段监测模型的应力应变和破坏特征,对围岩位移和破坏裂纹进行系统分析,揭示了高陡边坡的变形和破坏基本规律.其次,采用有限差分软件,从地表沉降量、应力值变化和塑性区分布等方面与相似材料实验结果进行了对比分析.结果表明,高边坡竖向最大沉降为28.2mm,围岩破坏程度随着开采深度的增加递增,塑性区范围不断扩大,剪切破坏主要集中在两侧边坡的边脚部位.相似模型实验和数值模拟相结合可以较好地揭示深凹露天转地下开采过程中高陡边坡的变形和破坏基本特征,是一种较好的理论研究方法.宋卫东 杜建华 杨幸才 Dwayne D Tannant 2010北京科技大学学报2010,32,2:52
2A multi-step approach for block-cave production scheduling optimization显示文摘Production schedules that provide optimal operating strategies while meeting practical,technical,and environmental constraints are an inseparable part of mining operations.Relying only on manual planning methods or computer software based on heuristic algorithms will lead to mine schedules that are not the optimal global solution.Mathematical mine planning models have been proved to be very effective in supporting decisions on sequencing the extraction of material in mines.The objective of this paper is to develop a practical optimization framework for caving operations’production scheduling.To overcome the size problem of mathematical programming models and to generate a robust practical near-optimal schedule,a multi-step method for long-term production scheduling of block caving is presented.A mixed-integer linear programming(MILP)formulation is used for each step.The formulations are developed,implemented,and verifed in the TOMLAB/CPLEX environment.The production scheduler aims to maximize the net present value of the mining operation while the mine planner has control over defned constraints.Application and comparison of the models for production scheduling using 298 drawpoints over 15 periods are presented.Yashar Pourrahimian Hooman Askari-Nasab Dwayne D.Tannant 2013International Journal of Mining Science and Technology2013,23,5:13
3基于连续-非连续方法的裂隙破坏与相互作用研究显示文摘岩体内裂隙等非连续结构面对岩体的强度及变形等力学特性有着显著的影响,研究岩体裂隙起裂、扩展、相互作用和贯通机制,对工程岩体力学行为的表征和工程性能的评价十分重要。本文基于连续介质力学模型的离散元方法,通过考虑裂隙分布、模型加载条件及其与裂隙产状的关系,建立了一系列裂隙力学计算模型,研究了不同模型裂隙扩展演化特征和岩体破裂机制,分析了岩体裂隙扩展规律及其对岩体破坏路径和强度的影响,研究结果表明:(1)裂隙岩体模型加载条件下的破坏起裂点、最终贯通破坏特征及损伤分布受控于裂隙的产状及其与最大主压应力取向角度大小及围压大小。(2)裂隙弱面走向与最大主压应力取向斜交时,裂隙弱面在加载条件下其端部裂隙扩展、贯通破坏表现比较明显,反之,当裂隙弱面走向与最大主压应力取向一致时,裂隙弱面被动影响裂隙模型内新生裂隙的萌生、扩展和贯通模式,自身未出现新的扩展破坏。(3)裂隙数目的增多和围压的增大会显著增加模型内部剪切裂缝的数量和模型破坏后的破碎程度,模型内部的损伤区域主要围绕破裂面呈滑移线型交叉分布,非破裂面区域损伤呈条带状X型分布。(4)裂隙弱面走向与最大主压应力取向斜交时,裂隙对岩体模型强度的弱化程度高于裂隙弱面走向与最大主压应力取向一致的情况,而裂隙模型破坏后的残余强度则正好相反。赵海军 Dwayne Tannant 郭捷 冯雪磊 马凤山 2019工程地质学报2019,27,5:11
4Electronic word-of-mouth via consumer-opinion platforms: What motivates consumers to articulate themselves on the Internet?显示文摘Thorsten Hennig-Thurau Kevin P. Gwinner Gianfranco Walsh Dwayne D. Gremler 2004Journal of Interactive Marketing2004,,1:8
5Surface texture and friction characteristics of diamond-ground concrete and asphalt pavements显示文摘Recently,diamond grinding has gained increasing attention as pavement preservation treatment to restore desired surface characteristics,particularly friction.Compared to other pavement preservation treatments such as surface overlays and high friction surface treatments,diamond grinding may cost less,save construction time,or require minimum maintenance.Diamond grinding produces longitudinal,continuous,and line-type texture that contains corrugations with evenly spaced ridges.The improved surface texture will immediately enhance pavement surface friction and reduce the possibility of hydroplaning in rainy weather.However,little information has been documented on the texture characteristics and long-term friction performance of diamond-ground pavements.A field evaluation was conducted to examine the surface texture and friction characteristics in diamondground concrete and asphalt pavements by the authors.Five pavement test sections,including two diamond-ground concrete pavements,one diamond-ground concrete bridge deck,one diamond-ground asphalt pavement,and one transversely tined concrete pavement,were selected for evaluation.Laser scanner testing was performed to capture both macro and microtexture profiles.Locked wheel testing was performed to measure the friction numbers.The test results were examined and compared so as to evaluate two performances,after construction and long-term friction performance of diamond-ground pavements.It was found that longitudinal diamond grinding can provide durable,satisfactory surface friction performance for both concrete and asphalt pavements.Shuo Li Dwayne Harris Tim Wells 2016Journal of Traffic and Transportation Engineering(English Edition)2016,3,5:5
6In vitro and in vivo application of RNA interference for targeting genes involved in peritrophic matrix synthesis in a lepidopteran system显示文摘大多数昆虫的 midgut 与一个半渗透的非细胞组成的试管被衬里, peritrophic 矩阵(下午) ,几丁质和蛋白质镇静。尽管各种各样的基因编码下午蛋白质被描绘了,我们他们在下午结构和功能的角色的理解是很有限的。为获得功能的信息的一条有希望的途径是 RNA 干扰,它被用来减少使用任何一个注射予幼虫以的双 stranded RNA 或喂的特定的 mRNAs 的层次。尽管这个方法很好在 dipterans 和甲虫类之昆虫被记录,它在 lepidopterans 的成功的报告被改变。在当前的学习,编码下午蛋白质的 silencing midgut 基因(昆虫肠的粘蛋白 1 ,昆虫肠的粘蛋白 4 ,下午蛋白质 1 )并且几丁质 biosynthetic 或修改的酶(几丁质 synthase-B 和几丁质 deacetylase 1 )在 noctuid 鳞翅类, Mamestra configurata ,在 vitro 并且在 vivo 被检验。在在主要 midgut 的 vitro 研究,上皮的房间准备揭示了尖锐、快速的 silencing (由 24 h ) 为编码几丁质 deacetylase 的基因 1 并且 silencing 的更慢的率(由 72 h ) 为编码下午蛋白质 1 的基因。肠的粘蛋白是的基因编码昆虫稍微由 72 h 的 silenced,而没有 silencing 为编码几丁质 synthase-B 的基因被检测。在 vivo,实验集中了于几丁质 deacetylase 1 基因是 silenced 到在 vitro 的最大的程度。与双 stranded RNA 的出生不满一月的婴儿和第四个中间形态幼虫的连续的喂导致了几丁质 deacetylase 的 silencing 1 由 24 和 36 h 分别地。喂单个剂量到出生不满一月的婴儿也由 24 h 导致了 silencing。当前的学习证明基因编码下午蛋白质能是为 RNA 干扰由的 silenced 和轮廓条件每在 lepidopterans 喂的 os。Umut Toprak Doug Baldwin Martin Erlandson Cedric Gillott Stephanie Harris Dwayne D. Hegedus 2013Insect Science2013,20,1:4
7Identification of the Mamestra configurata (Lepidoptera Noctuidae) peritrophic matrix proteins and enzymes involved in peritrophic matrix chitin metabolism显示文摘peritrophic 矩阵(下午) 为昆虫是必要的它由食物粒子,病原体,和毒素保护 midgut 上皮免受损坏的伤害的消化系统生理学。下午也由于它的 per os 可接近性是为新害虫控制策略的开发的一个吸引人的目标。理解 PM 怎么执行这些函数, PM 的分子的体系结构用 genomic 被检验, proteomic 在 Mamestra configurata 来临(鳞翅目:Noctuidae ) ,饰有十字架的 oilseed 的一个主要害虫在北美洲收割。PM 的液体层析双人脚踏车团 spectrometry 分析识别了是分类的 82 蛋白质:(i) peritrophins,与一个 CBDIII 领域包括一个新班;(ii ) 酶在几丁质修正(几丁质 deacetylases ) 包含了,消化(丝氨酸朊酶, aminopeptidases, carboxypeptidases,脂肪分解酵素和 α-amylase ) 或另外的反应(β-1,3-glucanase,碱的磷酸酶, dsRNase,虾红素, pantetheinase ) ;(iii ) 没有已知的 orthologs,由 polycalin, REPAT, serpin, C 类型 lectin 和 Lsti99/Lsti201 和 3 新奇蛋白质组成的一个异质的组。编码下午蛋白质的基因在 midgut 主要被表示。cDNAs 编码几丁质 synthase-2 (McCHS-2 ) , chitinase (McCHI ) ,和 β-N-acetylglucosaminidase (McNAG ) 酶,在下午几丁质新陈代谢包含了,也被识别。McCHS-2 表示对显示它为在 PM,的几丁质合成负责的 midgut 特定在 midgut 的唯一的几丁质的材料。相反,编码 chitinolytic 酶的基因在多重纸巾被表示。McCHS-2, McCHI,和 McNAG 在喂幼虫的 midgut 被表示,并且唠叨活动在 PM 是在场的。这个信息被用来产生鳞翅类的下午建筑学的一个更新的模型。Umut Toprak Martin Erlandson Doug Baldwin Steve Karcz Lianglu Wan Cathy Coutu Cedric Gillott Dwayne D. Hegedus 2016Insect Science2016,23,5:4
8Abusive supervision and work–family conflict: The path through emotional labor and burnout显示文摘Dawn Carlson Merideth Ferguson Emily Hunter Dwayne Whitten 2012The Leadership Quarterly2012,,5:2
9LZW data compression 显示文摘Dwayne P 1992The Computer Application Journal Circuit Cellar Inc1992,,7:1
10Predicting the service life of concrete marine structures; an environmental methodology显示文摘Stephen L A Dwayne A J Matthew A M 1998ACI Structural Journal1998,95,1:1
11Prediction and verification of electromagnetic forces in helical coil launches 显示文摘ENGEL T DWAYNE S NUNNALLY W 2003IEEE Transactions on Magnetics2003,39,1:1
12Yield Components of Biomass in Switchgrass显示文摘Boe Arvid Beck Dwayne L 2008Crop Science2008,,4:1
13Improved affordability of high precision submarin inertial navigation by insertion of rapidly developing fiber optic gyro technology显示文摘Dwayne W H 2000IEEE2000,,:1
14Predicting the service life of concrete structures: an environmental methodology 显示文摘Stephen L A Dwayne A J Matthew A M 1998ACI Structural Journal1998,95,2:1
15Two Brassica napus polygalacturonase inhibitory protein genes are expressed at different levels in response to biotic and abiotic stresses显示文摘Rugang Li Roger Rimmer Min Yu Andrew G. Sharpe Ginette Séguin-Swartz Derek Lydiate Dwayne D. Hegedus 2003Planta2003,,2:1
16Predieting the service life of concrete marine structures:An environmental methodology显示文摘STEPHEN L A DWAYNE A J MATTHEN A M 1998ACI Structural Journal1998,95,2:1
17Measuring switching Costs in IT outsourcing services 显示文摘Dwayne Whitten Robin L Wakefield 2006The Journal of Strategic Information Systems2006,15,3:1
18Investiga- tion into the behavior of armature ejecta in electromagnetic launchers显示文摘David A Wetz Jr Trevor J Watt Dwayne Surls 2011IEEE Trans Plasma Sci2011,39,3:1
19Predicting the service life of concrete marine structures: an environmental methodology 显示文摘STEPHEN L A DWAYNE A J MATTHEW A M 1998ACI Structural Journal1998,95,1:1
20Proteomics analysis of Trichoplusia ni midgut epithelial cell brush border membrane vesicles显示文摘The insect midgut epithelium is composed of columnar, goblet, and regenerative cells. Columnar epithelial cells are the most abundant and have membrane protrusions that form the brush border membrane (BBM) on their apical side. These increase surface area available for the transport of nutrients, but also provide opportunities for interaction with xenobiotics such as pathogens, toxins and host plant allelochemicals. Recent improvements in proteomic and bioinfbrmatics tools provided an opportunity to determine the proteome of the T. ni BBM in unprecedented detail. This study reports the identification of proteins from BBM vesicles (BBMVs) using single dimension polyacrylamide gel elec? trophoresis coupled with multi-dimensional protein identification technology. More than 3000 proteins were associated with the BBMV of which 697 were predicted to possess either a signal peptide, at least one transmembrane domain or a GPI-anchor signal. Of these, bioinfbrmatics analysis and manual curation predicted that 185 may be associated with the BBMV or epithelial cell plasma membrane. These are discussed with respect to their predicted functions, namely digestion, nutrient uptake, cell signaling, development, cell-cell interactions, and other functions. We believe this to be the most detailed proteomic analysis of the lepidopteran midgut epithelium membrane to date, which will provide information to better understand the biochemical, physiological and pathological processes taking place in the larval midgut.Muhammad Afzal Javed Cathy Coutu David A. Theilmann Martin A. Erlandson Dwayne D. Hegedus 2019Insect Science2019,26,3:1
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