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Search Results: 1 - 10 of 212268 matches for " 刘曦翔 "
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基于g/s模式架构的数字旅游服务平台研究
,苗放,王华军,,吴宇,
遥感技术与研究 , 2009,
Abstract: 空间信息技术的迅速发展使空间信息融入数字旅游成为可能,g/s模式是一种新型的空间信息网络服务模式,在研究数字旅游服务平台框架体系的基础上,研究并提出一种利用g/s模式架构数字旅游服务平台的方法和实现思路。最后给出了一个应用实例,验证了其可行性。
GLOBAL SEARCH ALGORITHM OF MINIMUM SAFETY FACTOR FOR SLOPE STABILITY ANALYSIS BASED ON ANNEALING SIMULATION
基于模拟退火算法的边坡最小安全系数全局搜索方法

Li Shouju,Liu Yingxi,He Xiang,Liu Yujing,
李守巨
,,,玉静

岩石力学与工程学报 , 2003,
Abstract: Based on the modified annealing simulation and simplified Bishop method for computing slope stability,an effective global minimization algorithm is presented for searching the minimal safety factor. The algorithm can simultaneously determine the minimal safety factor and the corresponding slip surface,and be applied to slopes with any geometry,layering,pore pressure and external load distribution. The application of the algorithm to slope stability problems shows that it can be used to search the global minimal safety factor for slope stability analysis by getting rid of local minimization.
IDENTIFICATION OF PERMEABILITY COEFFICIENT OF ROCK MASS IN DAM FOUNDATION BASED ON GENETIC NEURAL NETWORK
基于遗传神经网络的坝基岩体渗透系数识别

He Xiang,Li Shouju,Liu Yingxi,Zhou Yuanpai,
,李守巨,,周园π

岩石力学与工程学报 , 2004,
Abstract: The mathematical model of seepage field is introduced as the basis in identifying the permeability coefficient of the dam foundation by observing the dynamic information of the movement of underground water in seepage field. With the combination of genetic algorithm with artificial neural network,the newly established genetic neural network is of faster training speed and superior generating ability. The presented numerical example shows that the genetic neural network is of both higher computing efficiency and higher identification accuracy.
IDENTIFICATION WITH ARTIFICIAL NEURAL NETWORK OF LOAD PARAMETERS FROM UNDERGROUND EXPLOSION
基于人工神经网络的爆炸冲击荷载参数识别方法

Li Shouju,Liu Yingxi,He Xiang,Zhou Yuanpai,
李守巨
,,,周圆π

岩石力学与工程学报 , 2003,
Abstract: The artificial neural network model is used to identify the loads parameters from underground explosion according to the field measurement data of ground vibration and computed data with finite element method. The convergence rate of the artificial neural network is improved by using Levenberg-Marquardt optimization method. The influence of measurement noise on identified results is studied. The results of numerical computation show that the proposed identification method is of robustness and ability against measurement noise.
鄂尔多斯盆地大牛地奥陶系马五2段储层成岩相
白晓亮, 张哨楠, 丁晓琪, 杨鹏, 张亚, 王喆,
地质科技情报 , 2014,
Abstract: 通过岩心、薄片观察,结合测井、地球化学数据分析,认为大牛地马五2段主要有利储层发育的成岩作用为溶蚀作用、白云石化作用和破裂作用。综合分析得出马五2段储层成岩相主要包括泥质充填成岩相、去云化成岩相、去膏化成岩相以及白云石化成岩相,对马五2段成岩相的展布进行了深入分析,发现泥质充填成岩相主要沿岩溶沟槽的边缘分布,说明泥质充填相可能受古地貌的控制;去云化和去膏化成岩相主要在较高的部位发育;白云石化成岩相主要受沉积相分布的控制。对马五2段储集空间进行测井识别后认为,成岩相反映了沉积微相所决定的溶蚀差异特征;成岩相的分布反映了古地貌对岩溶储层的控制作用;白云石化成岩相为较为有利的储集相带分布区。
An Appropriate Parallel HMM for Speaker-Independent Speech Recognition
一种适于非特定人语音识别的并行隐马尔可夫模型

Chen Yan-xiang,Dai Bei-qian,Zhou Xi,Liu Ming,
陈雁
,戴蓓蒨,,

电子与信息学报 , 2004,
Abstract: In this paper Parallel Hidden Markov Model(PHMM)made up of several parallel Markov chains is proposed to fit in with speaker-independent speech recognition. The performance is improved because of the fusion of different models from classification based speech recognition. By sharing states of fused models, making classification automatically during training and getting result from all classifications, the amount of storage and operation can be decreased. The experiment for speaker-independent recognition of mandarin isolated digit shows that the PHMM improves the recognition performance and noise robustness.
中成药上市后临床安全性评价研究模式的探索建立
郑文科,,,田然,郑蕊,李楠,任经天,杜晓,商洪才
中国中药杂志 , 2015,
Abstract: 中药安全性问题已经成为社会关注的热点,中成药上市后临床安全性评价亟需开展。然而,关于如何开展相关研究,具体操作步骤尚无标准可循,故此,急需建立一种临床安全性评价研究模式和方法以指导实践。笔者根据课题组前期开展的一系列研究,提出在中成药上市后临床安全性评价工作中的几点看法,包括明确临床安全性评价的目的与内容,确定评价工作的流程,制定安全性评估项目清单,并提出三级风险分类控制,最终探索性的形成临床安全性评价研究模式。该评价模式根据前期研究基础,通过项目清单评估的方式对中成药目标品种进行风险分级,并分别针对不同风险级别的品种采取相应措施,目的是使药品从高风险级别降到低风险级别,最后进入五步骤循环无端的常态化风险管理,即广泛收集风险信号,通过数据挖掘等技术对风险进行识别,以过程质量控制进行风险评估,采取风险最小化措施的风险管理,再次应用于临床进行后效评估。希望该文提出的评价模式和方法能够为将来开展的研究提供参考。
绝缘子安装结构对污闪电压的影响
李震宇,崔吉峰,周远,王礼田,,亚新,鲁斌,周国华
电网技术 , 2005,
Abstract:
鄂西地区三叠纪嘉陵江组二段与三段局部平行不整合识别及沉积古地理研究
Identification of the Accord Unconformity between the Middle and the Upper Jialingjiang Formation and Palaeogeography
 [PDF]

李朋,, 祝安安, 周向辉, 毛启
Advances in Geosciences (AG) , 2015, DOI: 10.12677/AG.2015.53017
Abstract:
研究区位于上扬子地块的中北缘,南秦岭造山带的南侧,西侧为米仓山断裂带与大巴山弧形断裂带,是北东向构造区与近东西向构造区的叠合位置,在构造分区上具有重要的意义,构造运动在本区具有敏感的响应。前人在对本区的研究中认为晚二叠世–早三叠世的地层中均为整合接触。但在本次调查过程中,通过沉积地层、构造资料的研究对比分析,识别出了嘉陵江组二段与三段(T1-2j2/T1-2j3)之间的局部平行不整合接触关系,代表区域内又一次差异升降运动。同时将印支运动在本区活动的时限由中晚三叠世向前推至早–中三叠世。
The study area is located on the northern edge of the Yangtze Block and the south side of the Southern Qinling orogenic belt, and on the west side of this area there are Micang mountain fault belt area and Dabashan arc fault belt area. This area is an overlaying zone between NE and EW trending structure, and it shows great influences on the structure partition, with sensitive response to tectonic movement in this area. The early study believes that the formations from the Late Permian to the Early Triassic are conformities. However, this study, from the analysis of sediment formations and structure, identifies the accord unconformity between the middle and the upper Jialingjiang formation (T1-2j2/T1-2j3), which stands for another differential subsidence. The latest effect time of Indosinian movement in this area is early-middle Triassic.
矿山地质环境地形地貌景观现状评估量化分级——以陕西省两个煤矿为例

煤田地质与勘探 , 2015,
Abstract: 矿山地质环境保护与恢复治理方案编制规范对地形地貌景观影响程度提出的评估指标在实际工作中存在着不确定性和难以操作、量化的问题。以陕西省彬县和神木县的两个煤矿为例,从场地建设和采煤引发的地面塌陷两个因子考虑,分别对规范中两个指标的影响程度提出了量化分级的数值区间。这套评估指标量化体系,为煤矿矿山地质环境保护与恢复治理方案报告的编制工作提出了可操作性较强的理论依据。
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