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Search Results: 1 - 10 of 99 matches for " 马凯 "
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对羊水栓塞本源性发生机制和有效治疗方法探讨
Fontal pathogenesis and effective therapies of amnioticfluid embolism

马凯
- , 2017,
Abstract: 在工作中,笔者遇到一例症状自发好转的羊水栓塞存活病例。这促使笔者对羊水栓塞的发生机制进行了新的探讨。发现羊水栓塞的临床表现应该用过敏性休克和弥散性血管内凝血的相互作用来解释。笔者对传统的羊水栓塞治疗方法进行了改进,并尝试性地提出了中医治疗弥散性血管内凝血的方法。
Clinically, I fell across a surviving case of amniotic fluid embolism whose symptoms improvedspontaneously. This case impelled me to investigate further the pathogenesis of amniotic fluid embolism. I found that thesymptoms of amniotic fluid embolism should be explained by the reciprocity of anaphylactic shock and disseminatedintravascular coagulation (DIC). Then I ameliorated the traditional therapies of amniotic fluid embolism and tentativelyadvanced the therapies with traditional Chinese medicine for DIC
应激不是应激性溃疡的主要病因
Stress is not the primary pathogeny of stress ulcer

马凯
- , 2016,
Abstract: 为了了解应激性溃疡的病因,笔者分析了应激和应激性溃疡的关系、幽门螺杆菌(Hp)感染和应激性溃疡的关系。从分析结果可以发现:应激不能解释应激性溃疡的临床表现;Hp感染可以较好地解释应激性溃疡的临床表现。由此提出假说:Hp感染是应激性溃疡的主要病因。应激性溃疡的治疗应该以抗Hp治疗为主。
To understand the pathogeny of stress ulcer, the author analyzed the relationships between stress ulcerand stress as well as Helicobacter pylori infection. It was found that stress can not be the explanation for the clinicalmanifestations of stress ulcer, while Helicobacter pylori infection can be. So this paper proposed a hypothesis: Helicobacterpylori infection is the primary pathogeny of stress ulcer. The treatment of stress ulcer should focus on suppressingHelicobacter pylori
建议对《临床麻醉学》部分插图进行修正
Advice to correct some figures in Clinical Anesthesiology

马凯
- , 2016,
Abstract: 通过查阅《麻醉解剖学》教材,发现《临床麻醉学》教材的部分插图存在标注或绘制不当。建议《临床麻醉学》的编者修正问题插图,以提高教材的科学性、权威性和可信度。
By referring to Anesthesia Anatomy textbook (by Zhang Licai), the author found that some figures inClinical Anesthesiology (by Guo Qulian and Yao Shanglong) are mistakenly labeled or improperly drawn. The authoradvised that the editors of Clinical Anesthesiology correct the figures to improve the scientific nature, authority andcredibility of the textbook
GIS simulation on the distribution of submerged macrophytes in Baoan Lake
保安湖沉水植物分布的GIS模拟

MA Kai,
马凯

生态学报 , 2003,
Abstract: 以GPS为辅助,在保安湖主体湖和桥墩湖进行沉水植物调查。将野外调查数据构建GIS数据库,基于GIS软件平台,运用Kringing插值法对保安湖沉水植物分布进行模拟。模拟结果清楚地显示出调查时保安湖沉水植物及4优势种(金鱼藻Ceratophyllum demersum L.、穗状狐尾藻Myriophyllum spicatum L.、微齿眼子菜Potamogeton maackianus A.Benn.及苦草Vallisneria spiralis L.)分别在湖中的分布情况。统计后结果表明沉水植物覆盖面积占全湖面积的92.9%,总生物量(湿重)为143682.4t。比较历史数据,发现湖中水生植被组成特征已由微齿眼子菜绝对优势转变为4种植物的共同优势。
面向集群环境的虚拟化GPU计算平台
Virtualized GPU computing platform in clustered system environment

杨经纬,马凯,龙翔
- , 2016, DOI: 10.13700/j.bh.1001-5965.2015.0731
Abstract: 摘要 针对集群系统的多节点多GPU环境,提出一种新型虚拟化GPU计算平台。该平台实现对集群系统所有节点上GPU资源的统一抽象与管理,构建公共GPU资源池。原有GPU应用程序可以不经任何修改而迁移到虚拟化GPU计算平台,并具备访问资源池内任何GPU的能力,编程人员无需显式针对多节点多GPU应用展开MPI编程。应用程序摆脱了单个节点上GPU资源的限制,并具备无差别地访问集群系统中任何可用GPU资源的能力,能有效提高系统总体资源利用率以及吞吐量。采用流水化通信技术,实现对虚拟化GPU计算平台的运行时开销以及节点间数据传输延迟的隐藏。实验表明:与非流水化通信相比,系统总体数据传输延迟降低了50%~70%,具备与节点机本地数据传输等同的通信性能。
Abstract:A virtualized GPU computing platform is proposed for clustered systems, which are often equipped with GPUs in some nodes. All GPUs in system are uniformly abstracted as virtualized ones in a commonly accessed resource pool. Legacy GPU programs can execute on the virtualized GPU computing platform without any modification and any free virtualized GPU in the common resource pool is available to it, which relieves the burden of MPI programming. The platform frees programs with the limit of GPUs in local node and makes it possible for them to access any available GPU in distributed nodes, leading to higher system utilization and throughput. Based on pipelined communication, the run-time overhead and inter-node transmitting latency in virtualized GPU computing platform are hidden by intra-node memory copying and GPU computing. Compared with the non-pipelined communication, the total transmission latency is decreased by approximately 50%-70%. It results in a comparable performance with intra-node local data transmission.
喀什地区冬季果园微环境的低温特征分析
马凯,闫鹏,韩立群
经济林研究 , 2015,
Abstract:
纤维增强复合材料层板高速倾斜冲击损伤数值模拟
马凯,许希武,古兴瑾
复合材料学报 , 2013,
Abstract: 根据复合材料三维黏弹性本构关系,建立了纤维增强复合材料层板高速倾斜冲击损伤的数值分析模型。该模型在复合材料层间引入界面单元模拟层间分层,结合三维Hashin失效准则进行单层板面内损伤识别,引入材料刚度折减方案,采用非线性有限元方法,研究高速倾斜冲击下复合材料层板的破坏过程和损伤特性。研究结果表明:层板的主要损伤形式是层间分层、基体微裂纹和纤维断裂;冲击速度不变而入射角度增大时,剩余速度减小,层板损伤面积在一定入射角度范围内有明显变化;入射角度不变而冲击速度增大时,剩余速度增大,层板损伤面积在一定速度范围内也有明显变化。
高韧性煤层综放开采难冒放机理及弱化效果研究
马文强,王同旭,马凯
煤炭科学技术 , 2015,
Abstract: 为改善高韧性煤层综放开采顶煤冒放性,以煤样物理力学参数测定试验为基础,从理论方面对高韧性特厚煤层综放开采顶煤难冒放机理和弱化机理进行了分析;运用UDEC模拟软件从初采和正常推进2个阶段对顶煤冒放情况进行了数值模拟。结果表明:高韧性煤层弹性模量小于顶板岩层时,在矿山压力作用下,顶煤的变形挠度大于顶板,导致顶板不能将矿山压力较好的传递给顶煤,综放作业时顶煤难破碎垮落,易形成悬顶,冒放性较差,不利于顶煤的回收;对顶煤采取弱化措施后,回采时顶板垮落情况明显改善,直接顶随采随冒,较好的充填了采空区,顶煤冒放性较好。
交通规划四阶段法在物流需求预测中的应用
马凯,艾力??斯木吐拉
重庆交通大学学报(自然科学版) , 2009, DOI: 10.3969/j.issn.1674-0696.2009.04.26
Abstract: :?结合交通规划四阶段法的特点,在城市物流规划中的物流需求预测基础上,研究了物流需求分阶段的预测方法,并对物流需求预测模型进行了应用分析,最后基于四阶段物流需求预测,论述了相应的城市物流调查与分析的内容和方法。
金莲花产量抽样调查的样地最小面积与形状研究
李永宁,马凯,黄选瑞
草业学报 , 2011,
Abstract: 抽样调查是植物资源调查的一种重要方法,样地的面积与形状是抽样调查的基础,影响着调查的效率与精度。为确定野生金莲花产量抽样调查的最适样地面积与形状,设计了边长或半径逐步增大的正方形、长方形、圆形3种样地,选择了GeneralizedMitscherlich方程、Richard方程与Logistic方程拟合变异系数-面积的变化趋势。提出了以变异系数的变化率与调查费用最小为判据,确定样地最小面积的2种方法,并对不同形状的样地进行比较以确定适合的样地形状。结果表明,3种变异系数-面积曲线的拟合效果均较好,相关指数均达到0.94以上,但以Logistic方程最为稳定。以变化率确定的最小面积,同一样地形状表现为Richard方程>Logistic方程>GeneralizedMitscherlich方程;采用同一个回归方程,样地最小面积表现为圆形>正方形>长方形,正方形与长方形较为接近。基于最小费用研究表明,同一样地形状采用不同回归方程所得最小费用相近,但最小面积各不相同;对于同一回归方程,样地最小面积同样表现为圆形>正方形>长方形,正方形与长方形相近的趋势。最后,综合确定正方形样地的最小样地面积为36m2(6m×6m),长方形为32m2(8m×4m),圆形为78.5m2(半径5m)。不同形状的样地,从所能达到的最小变异系数、相同面积与精度时的调查费用与不同回归模型反映的稳定性来说,长方形样地最好,正方形次之,但二者相差不大,圆形最差。
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