oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 107 )

2018 ( 6159 )

2017 ( 6062 )

2016 ( 6176 )

Custom range...

Search Results: 1 - 10 of 334673 matches for " <br>裴华富 "
All listed articles are free for downloading (OA Articles)
Page 1 /334673
Display every page Item
IN-SITU MONITORING OF DISPLACEMENTS AND STABILITY EVALUATION OF SLOPE BASED ON FIBER BRAGG GRATING SENSING TECHNOLOGY
基于光纤光栅传感技术的边坡原位测斜及稳定性评估方法

PEI Huafu,YIN Jianhua,ZHU Honghu,HONG Chengyu,FAN Youhua,<br>,殷建华,朱鸿鹄,洪成雨,凡友
岩石力学与工程学报 , 2010,
Abstract: 首先介绍基于光纤布拉格光栅传感技术的新型原位测斜仪及其分析方法。根据光纤布拉格光栅波长变化与应变之间的线性关系求得原位测斜仪各测点的应变,然后通过梁的弯曲理论公式和差分算法,由测点应变计算出原位测斜仪各点的位移。该原位测斜仪克服了传统原位测斜仪精度低、耐久性差、操作繁琐等缺点。室内标定试验验证了该新型原位测斜仪和分析方法的有效性。针对攀田高速公路一路堑边坡,将3套新型光纤光栅原位测斜仪安装于该边坡同一剖面的3个钻孔里,并保证测斜仪贯穿了边坡内的潜在滑裂面,对该边坡进行现场监测。假设边坡滑动面为圆弧形,根据当前监测结果,以3个孔原位测斜仪所测应变之和最大为目标函数,以原位测斜仪在边坡坐标系中的位置和滑裂面的形状为约束条件,建立最优化数学模型来推求潜在滑裂面的具体位置。根据经典Bishop条分法计算得到了该潜在滑裂面对应的边坡安全系数,以评估该边坡当前的稳定性。本方法在基于边坡监测成果的边坡稳定性评估方面提出了新的可靠的途径。
Design and experimental verification of band-pass frequency selective surface based on metamaterial effective medium theory
基于超材料等效介质理论的带通频率选择表面设计及验证

WU Xiang,PEI Zhi-Bin,QU Shao-Bo,XU Zhuo,ZHANG Jie-Qiu,MA Hu,WANG Jia-Fu,WANG Xin-Hua,ZHOU Hang,<br>吴翔,志斌,屈绍波,徐卓,张介秋,,王甲,王新华,周航
红外与毫米波学报 , 2011,
Abstract: By adjusting the effective permittivity of the unit cell, a new method of constructing metamaterial band-pass frequency selective surface was proposed. The effective permittivity of continuous conducting wires is negative below the plasma frequency and thus a stop-band occurs. By combining the continuous conducting wires with cut wires, we realized a one-dimensional frequency selective surface. Both the theory analysis and simulation results demonstrated the facility and feasibility of the method. We also designed a wide-angle and polarization-independent frequency selective surface based on this method. Two samples were fabricated to validate the proposed method; the experiment results were fairly consistent with the simulation results. The proposed method eliminates the complicated calculation and excessive parameter optimization process. It paves a new way of designing frequency selective surfaces and is of important reference values for fabricating THz frequency selective surface as well as multi-band, tunable and miniaturized frequency selective surfaces.
gfrp土钉拉拔特性研究
朱鸿鹄,张诚成,,周游,施斌
岩石工程学报 , 2012,
Abstract: 由于传统土钉材料存在易腐蚀、耐久性差等缺点,近年来以gfrp为代表的新型土钉材料得到了高度重视。针对gfrp土钉受力特性,运用双曲线模型描述其在拉拔过程中剪应力–剪应变关系,采用数值方法求解拉拔控制方程,从而确定轴力、剪应力及位移沿钉长的分布。同时,通过室内gfrp模型土钉的拉拔试验,验证了该模型预测结果的准确性。在此基础上,对土钉直径、土–钉界面抗剪强度、土–钉模量比等参数进行了参数分析,并针对gfrp土钉容许拉拔力的确定提出了按位移控制的思路。
海相砂页岩型铜矿成矿模式与地质对比――以中国云南东川铜矿和阿富汗安纳克铜矿为例
高辉,,王安建,曹殿,范世家,梅燕雄
地质通报 , 2012,
Abstract: 从海相砂页岩型铜矿时空分布、经济特征、成矿地质背景与沉积环境入手,对中国云南东川-易门铜矿带和阿富汗安纳克铜矿床(带)等进行典型矿床分析与地质特征对比,从成矿物质来源、成矿机制(流体的性质、作用和动力学,金属元素迁移、富集、沉淀和就位机制)等方面对海相砂页岩型铜矿床成因进行探讨,系统分析各种“沉积-成岩-改造”成矿模式、成矿作用与过程,对阿富汗安纳克、云南东川落雪式铜矿床等沉积岩容矿的层状铜矿床成因模型进行总结;在此基础上,进一步深入阐述了海相砂页岩型铜矿成矿与超级古大陆事件的耦合性及衍生成矿作用。通过分析,对中国东川-易门铜矿带,以及与阿富汗安纳克铜矿床毗邻的新疆西昆仑成矿省的海相砂页岩型铜矿找矿前景进行评价和预测。
高速公路交通流数据检测系统设计
Design of the Expressway Traffic Flow Surveillance System
 [PDF]


Open Journal of Transportation Technologies (OJTT) , 2014, DOI: 10.12677/OJTT.2014.34016
Abstract:
系统由现场交通流采集系统和远程数据处理中心两部分组成。现场交通流采集系统采用基于GMR的地磁式车辆检测器作为交通流数据检测传感器,各设备之间采用无线自组网方式进行数据传输。远程数据处理中心与现场交通流采集系统通过GPRS或3G通信,可实现交通流数据远程集中控制和管理。本系统环境适应性强,安装维护方便,具有一定的实用价值。
Through analyzing the characteristics of various traffic flow data detection methods and the envi-ronment of the expressway traffic, this paper designs the expressway traffic flow surveillance system which includes live traffic flow data acquisition system and remote data processing center. Live traffic flow data acquisition system uses the vehicle detector based on GMR as traffic flow sensors. With GPRS or 3G network, traffic flow data are transmitted to remote data processing center which can realize the centralized control and management for the data of traffic flow. This system has environment adaptability and high detection reliability, and can be applied to ex-pressway network traffic guidance and effective emergency evacuation.
Integration and Fusion of Multi source Information and its Optimized Using in RS Image Based Mapping
多源信息的集成与融合及其在遥感制图中的优化利用

QI Qing wen,PEI Xin fu,<br>齐清文,
地理科学进展 , 2001,
Abstract: The integration & fusion of multi source information is one of the key problems in Geo information Science. Its significance is linked closely with the feature of geo information, the technological characteristics of information gathering, as well as the feature of system for information processing. This paper expounded the author's study on the method, the latest techniques and the application, of integration & fusion for multi source information, detailed in three respects, i.e., the integration & fusion of information from different RS sensors and platform, the integration & fusion of RS information with non RS information, and the integration & fusion of GIS data in different format. Furthermore, the author analyzed the optimized using of this technique, taking the RS image based investigation of soil erosion in Loess Plateau as an example, including the analysis of technical workflow for RS based image mapping, the analysis of various information sources and the method information fusion, as well as information transformation technology from RS based image to GIS database, etc. The paper concluded that for the purpose of optimum utilization of information from various sources, the integration & fusion of multi source information is remarkably important, and the methods & techniques related in this paper are highly efficient and usable.
TECTONIC SETTINGS OF THE FORMATION OF STRATABOUND DEPOSITS AND THEIR METALLIZATION IN SOUTH-EASTERN CHINA
我国东南部地区层控矿床形成的构造环境和成矿作用

WU Liang-shi,PEI Rong-fu,<br>吴良士,
地球学报 , 1989,
Abstract: The formation of stratabound mineral deposits must be provided with two basic conditions:Source beds and geological driving actions (Geological processes of enrichment). In south eastern China, the source beds mainly occur in Presinian, Sinian-Early Cambrian and Devonian-Early carboniferous strata and the location of the ores are controlled by structural environments of the sedimentary formations formed in different periods. The transitional belt between the marine and continental fades is the most favourable for the formation of source beds. Therefore, there is a certain regularity in ppatial distribution of source beds, which controls the distribution of stratabound mineral deposits. The geological driving actions in south-eastern China have many forms, i. e. faulting, folding, volcanic activity and intrusi-ms. However, most of the stratabound mineral deposits were formed by under the influence of combined actions. The intensity and frequency of geoiogica! driving actions and their combination forms will decide the characteristics of the stratabound mineral deposits.
P-SV Wave Reflection Coefficient Approximations and Characteristics of AVO Attributes
1:2500万世界大型、超大型矿床成矿图编制及全球矿产成矿规律研究与评价

PEI Rong-fu,MEI Yan-xiong,<br>,梅燕雄
地球学报 , 2006,
Abstract: 为了使P-SV波反射系数随入射角的变化特征更为明确,便于利用多种属性进行AVO分析和参数反演,本文首先用斯奈尔定律将AKI&RICHARDS给出的P-SV波反射系数近似公式中与横波反射角有关的角度项余弦表示成入射角的正弦,然后对改写后的表达式按入射角的正弦进行二项式展开,对展开结果取前两项,并引入二倍角来保留与入射角有关的角度项余弦对反射系数的贡献,最后得到了一个形式简单、不涉及横波反射角和透射角的P-SV波反射系数近似公式。为了验证新公式的近似精度,我们选用了岩性界面条件下的不同实际含油气砂岩模型进行了定量计算,并与P-SV反射系数公式的解析解及AKI等近似公式进行了对比研究。对比结果表明:新的近似公式以内能够准确反映P-SV转换波的振幅随偏移距变化的规律,体现了很高的近似精度,甚至比AKI等原近似公式的效果还好。在此基础上,通过对新近似公式不同形式的表述,详细分析了不同AVO属性组合反映的背景趋势及在25个不同含油气地层模型上的AVO交绘图特征,同时还讨论了利用这些不同形式的AVO属性来提取密度差、速度差等基本地层参数的过程和构建多种地震属性剖面的方法。通过分析和讨论可以得出:本文给出的近似公式不仅具有较高的精度,而且还可以利用这些新的AVO属性及其组合构成多种属性的AVO交绘图特别是可以构建ΛΡ和ΜΡ型流体因子、剪切模量、及纵横波速比等非常规地震属性剖面。这些结论对于P-SV波AVO分析和多波AVO理论研究都具有重要意义。
REGIONAL METALLOGENETIC ENVIRONMENTS AND BASIC FEATURES OF ORE-FORMING PROCESS IN EASTERN CHINA
中国东部地区区域成矿环境与成矿作用的基本特征

PEI Rong-fu,WU Liang-shi,<br>,吴良士
地球学报 , 1990,
Abstract: <正> 中国东部地区经历了漫长而复杂的地质作用。在前中生代曾发生两次较大的地质事件:一是在早古生代,西伯利亚陆壳及其南侧陆缘与华北陆壳及其北侧陆缘区开始拼撞,至中—晚海西期沿着索伦山—西拉木伦河一线呈近东西向拼合;二是大约在晚中元古代,华南陆究及其南侧陆缘区与华北陆壳开始拼撞,至印支期基本上沿大别—淮阴一线呈近东西向拼合。于是,在中国东部形成三个性质不同的构造区域及与之相间的二条拼合构造带,从北向南为:以华力西褶皱为基底的北方(蒙古—西伯利亚)陆壳及陆缘构造域。
REGIONAL METALLOGENETIC CONDITIONS OF THE MESOZOIC VOLCANICS IN SOUTH CHINA
中国东南部中生代火山岩区域成矿条件

PEI Rong-fu,WU Liang-shi,<br>,吴良士
地球学报 , 1987,
Abstract: The regional metallogenetic condition of the volcanics in South China depends firstly upon the characteristics of volcanic basins. Accordingly, three types of volcanic basin have been recognized, i.e., Mesozoic superimposed type (Fig. 1) Paleozoic superimposed type (Fig. 2) and explosive type (Fig. 3). Each of them has its own types of mineral deposits (Table 1). The conditions of development of the volcanic cycle controls the ore-bearing degree of the. volcanic basin, and generally speaking, the better developed volcanic formations are of the better mineralization possibilities (Fig. 4). "The principal lithological (petrological) character"of the basin-the bulk composition of its total volcanics predominates oyer the metallogenic attribute of the basin. When "the principal lithological character"is of intermdiate volcanic rock,the metallogenic attributes of the rocks would be of Fe, V, Au, S, and P; in the case of intermediate-acidic volcanics, the attributes would be of Pb, Zn, Ag, Cu, and Au; and acidic ones, Pb, Zn, W, Mo, and Sn (Table 3). The most favourable ore-forming conditions are provided by the subvolcanic rocks and volcano-intrusive rocks whose principal lithological character is similar to that of the same volcanic basin, and moreover, the best occurrence site for ore bodies is situated at the front position of intrusive rocks (Fig. 6). The fractures, especially the persistently active ones, control not only the formation of volcanic basins and the eruption of volcano, but also metallogenesis. Besides, the derived fractures and two sets of intersecting fractures (Fig. 7) as well as the breccia belt (Fig. 8) are also favourable storage structures for ores. Wall rock alteration may be classified as regional and metallogenic wall rock alterations. The former is only restricted to the alteration of the volcanic rock of the early stage caused by regional volcanic eruption of the late stage, which has nothing to do with ore formation. But the latter is closely connected with metallogenesis, with certain alteration corresponding to certain relevant minerals (Table 5). Moreover, wall rock alteration is of zoning character. The more distinct the zoning of alteration, the better the ores are developed, and the more concentrated the ore bodies are in the intensely altered parts (Fig. 9 and 10).
Page 1 /334673
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.