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强混响条件下基于广义互相关的声源定位算法改进

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计测技术 2018年第1期38卷 43-47页

作者：蒋相斌白宗龙孙金玮黄博妍哈尔滨工业大学黑龙江哈尔滨150001

针对特定声场环境,提出了一种强混响条件下基于广义互相关的声源定位算法的改进措施,即利用混响成分中包含的声源位置信息,提高声源定位的正确率。混响与噪声是影响声源定位的两个主要因素。目前声源定位的主要方法都是以降低信号中混... 详细信息

针对特定声场环境,提出了一种强混响条件下基于广义互相关的声源定位算法的改进措施,即利用混响成分中包含的声源位置信息,提高声源定位的正确率。混响与噪声是影响声源定位的两个主要因素。目前声源定位的主要方法都是以降低信号中混响与噪声成分为目标的,如波束成形、空间谱估计以及到达时间差法等。其中,基于广义互相关的声源定位算法属于到达时间法的常用方法,具有实时性强与高鲁棒性的优势。本文采用镜像源模型对室内环境进行建模,分析声源到双麦克风的传播路径,利用混响中存在的声源位置信息剔除错误定位结果,从而提高定位正确率。最后,利用蒙特卡洛法对本文提出的方法进行验证,结果表明:该算法提高了强混响低信噪比条件下的声源定位正确率。

关键词：声源定位到达时间法镜像源模型广义互相关

北京市怀柔区水资源存量及变动表编制技术问题探讨

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中国水利 2017年第3期 16-19页

作者：赵泓漪白国营孙晋炜唐东徐晨阳北京市水文总站北京100089 北京市水利规划设计研究院北京100044 北京市怀柔区水务局北京101400

编制水资源存量及变动表是国家生态文明建设的基础性工作,也是与国际水资源环境经济核算体系接轨的基本要求。根据国家统一部署和相关技术要求,在分析北京市怀柔区水资源特征与开发利用实际基础上,确定编制原则与技术框架,将表中的核算... 详细信息

编制水资源存量及变动表是国家生态文明建设的基础性工作,也是与国际水资源环境经济核算体系接轨的基本要求。根据国家统一部署和相关技术要求,在分析北京市怀柔区水资源特征与开发利用实际基础上,确定编制原则与技术框架,将表中的核算要素分为三类,分别确定核算方法,并提出了独立于核算表的合理性分析方式,探讨了水资源存量及变动表编制过程中相关技术问题的处理方法,以期为更多地区开展类似工作提供试点经验,从而推动水资源资产负债表编制工作。

关键词：水资源存量及变动表编制技术怀柔区

深圳市生产建设项目水土保持监督管理工作探讨

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中国水土保持 2019年第2期 14-15,24页

作者：任亮许文盛孙金伟黄金权张平仓长江水利委员会长江科学院湖北武汉430010

深圳市地处我国改革开放的前沿阵地,随着城市化进程的加快,大规模城市基础设施建设引发了严重的水土流失危害,破坏城市生态环境,降低市政管网运行效能,影响全市治水成效。面对水土流失问题,近年来深圳市按照法律赋予的职责开展水土保持... 详细信息

深圳市地处我国改革开放的前沿阵地,随着城市化进程的加快,大规模城市基础设施建设引发了严重的水土流失危害,破坏城市生态环境,降低市政管网运行效能,影响全市治水成效。面对水土流失问题,近年来深圳市按照法律赋予的职责开展水土保持管理工作,创新监督管理工作思路,完善配套制度和技术保障体系,在水土流失治理上取得了阶段性成效。总结了深圳市水土保持监督管理工作的经验,分析了监督管理中存在的一些问题,并根据新形势对水土保持监督管理的要求,谈了对后续工作的几点思考,可为类似城市的水土保持监督管理工作提供借鉴和参考。

关键词：深圳市生产建设项目水土保持监督管理

松辽盆地北部青山口组夹层型页岩油形成地质条件及勘探潜力

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大庆石油地质与开发 2024年第3期43卷 38-48页

作者：蒙启安张金友吴伟康德江王金伟于丹孙祖宇刘丽娟刘帅刘金凤张智聪于婷婷多资源协同陆相页岩油绿色开采全国重点实验室黑龙江大庆163712 中国石油大庆油田有限责任公司黑龙江大庆163458 中国石油大庆油田有限责任公司勘探开发研究院黑龙江大庆163712

松辽盆地北部青山口组是大庆油田重要的页岩产油层,主要发育泥纹型和夹层型2种类型的页岩油,其中泥纹型页岩油已经在Q9油层取得效益勘探,夹层型页岩油近2年也受到了广泛关注,部分探井取得较好效果,展现了一定的资源规模,是大庆油田增储... 详细信息

松辽盆地北部青山口组是大庆油田重要的页岩产油层,主要发育泥纹型和夹层型2种类型的页岩油,其中泥纹型页岩油已经在Q9油层取得效益勘探,夹层型页岩油近2年也受到了广泛关注,部分探井取得较好效果,展现了一定的资源规模,是大庆油田增储建产的重要接替领域。基于钻井、测井、岩心和实验分析资料,通过对青山口组沉积相、砂体分布、储层宏微观特征和含油性的系统分析,明确了松辽盆地白垩系青山口组夹层型页岩油形成的地质条件及勘探潜力。结果表明:青山口组沉积时期,主要发育北部和西部物源,沉积微相类型主要为水下分流河道、河口坝、远砂坝、席状砂、浊积砂和砂质碎屑流,夹层砂岩在全区大面积分布,沿着物源方向逐渐减薄;夹层型页岩油砂岩储层主要发育粒间孔和溶蚀孔,有效孔隙度一般为6%~12%,页岩储层主要发育粒间孔、晶间孔、有机生烃缝等,砂岩和页岩均具有较好的储集能力;青山口组夹层型页岩油源储一体近距离运移立体成藏,砂岩、页岩普遍含油,在成熟烃源岩内为纯油区,大规模连续成藏;按照有效烃源岩范围、砂岩分布范围、储层特征、黏土矿物含量、油水关系等地质条件,综合划分了青山口组夹层型页岩油发育的有利区带,初步估算资源量潜力为25×10^(8) t,展现出良好的勘探前景。主要参数对比结果表明,齐家南和古龙西地区夹层砂岩相对较厚、源岩品质相对较好,是近期增储建产的现实区带。

关键词：松辽盆地北部青山口组夹层型页岩油地质条件勘探潜力

维普期刊数据库博看期刊

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车窗升降控制器的防夹测控算法

中国科技论文在线 2010年第8期5卷 615-618页

作者：王晓明韩阳任少义王丹雷涛孙金玮哈尔滨工业大学电气工程及自动化学院哈尔滨150001

首先给出车窗升降传动系统模型并进行参数计算,并就电动机-减速器-旋转直线变换-车窗及其升降轨道系统的结构建立模型和进行参数计算,特别给出旋转霍尔脉冲-车窗提升当量的表达式。给出电流检测法、电流纹波检测法和旋转脉冲的加速度检... 详细信息

首先给出车窗升降传动系统模型并进行参数计算,并就电动机-减速器-旋转直线变换-车窗及其升降轨道系统的结构建立模型和进行参数计算,特别给出旋转霍尔脉冲-车窗提升当量的表达式。给出电流检测法、电流纹波检测法和旋转脉冲的加速度检测法以及混合算法的系统结构,通过对比说明各种算法和系统的优缺点。

关键词：永磁直流电机车窗升降防夹算法

Treatment of malignant glioma using hyperthermia

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Neural Regeneration Research 2013年第29期8卷 2775-2782页

作者： Jiahang sun Mian Guo Hengyuan Pang Jingtao Qi jinwei Zhang Yunlong Ge Department of Neurosurgery the Second Affiliated Hospital of Harbin Medical University

Thirty pathologically diagnosed patients with grade Ⅲ-Ⅳ primary or recurrent malignant glioma （tumor diameter 3-7 cm） were randomly divided into two groups. The control group underwent conventional radiotherapy and chemotherapy. In the hyperthermia group, primary cases received hyperthermia treatment, and patients with recurrent tumors were treated with hyperthermia in com- bination with radiotherapy and chemotherapy. Hyperthermia treatment was administered using a 13.56-MHz radio frequency hyperthermia device. Electrodes were inserted into the tumor with the aid of a CT-guided stereotactic apparatus and heat was applied for 1 hour. Dudng 3 months a^er hyperthermia, patients were evaluated with head CT or MRI every month. Gliomas in the hyper- thermia group exhibited growth retardation or growth termination. Necrosis was evident in 80% of the heated tumor tissue and there was a decrease in tumor diameter. Our findings indicate that ra- dio frequency hyperthermia has a beneficial effect in the treatment of malignant glioma.

关键词： neural regeneration glioma radio frequency hyperthermia necrosis malignant tumor recurrence CT MRI intracranial hypertension clinical effects grants-supported paper neuroregeneration

Numerical Simulation of Mechanical Compaction of Deepwater Shallow Sediments

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Journal of Ocean University of China 2018年第1期17卷 53-64页

作者： sun Jin WU Shiguo DENG Jingen LIN Hai ZHANG Hanyu WANG Jiliang GAO jinwei Laboratory of Marine Geophysics&Geo-Resources Institute of Deep-Sea Science and EngineeringChinese Academy of SciencesSanya 572000China Qingdao National Laboratory for Marine Science and Technology Qingdao 266237China College of Earth Sciences University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing 102249China CNOOC China Limited Tianjin Branch Tianjin 300451China

To study the compaction law and overpressure evolution in deepwater shallow sediments, a large-strain compaction model that considers material nonlinearity and moving boundary is formulated. The model considers the dependence of permeability and material properties on void ratio. The modified Cam-Clay model is selected as the constitutive relations of the sediments, and the deactivation/reactivation method is used to capture the moving top surface during the deposition process. A one-dimensional model is used to study the compaction law of the shallow sediments. Results show that the settlement of the shallow sediments is large under their own weight during compaction. The void ratio decreases strictly with burial depth and decreases more quickly near the seafloor than in the deeper layers. The generation of abnormal pressure in the shallow flow sands is closely related to the compaction law of shallow sediments. The two main factors that affect the generation of overpressure in the sands are deposition rate and permeability of overlying clay sediments. Overpressure increases with an increase in deposition rate and a decrease in the permeability of the overlying clay sediment. Moreover, an upper limit for the overpressure exists. A two-dimensional model is used to study the differential compaction of the shallow sediments. The pore pressure will still increase due to the inflow of the pore fluid from the neighboring clay sediment even though the deposition process is interrupted.

关键词： mechanical compaction deepwater shallow sediments compaction law shallow water flow overpressure evolution

The Seismogenic Structure of the 2010 Suining Ms 5.0 Earthquake and its Geometry,Kinematics and Dynamics Analysis

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Acta Geologica Sinica(English Edition) 2011年第6期85卷 1277-1285页

作者： LU Renqi HE Dengfa JOHN Suppe MA Yongsheng GUAN Shuwei sun Yanpeng GAO jinwei Institute of Oil and Gas School of Earth and Space Sciences Peking University Beijing 100871 China College of Energy Resources China University ofGeosciences Beijing 100083 China The Department ofGeosciences TaiWan University. TaiPei 13-318 China Oil fieldExploration Production Department SINOPEC Beijing 100728 China Research Institute of Petroleum and Development of China Beijing 100083 China

In January 2010, the Suining Ms5.0 earthquake occurred in central Sichuan Basin, with the epicenter in Moxi-Longnvsi structural belt and a focal depth of 10 km. Based on structural interpretations of seismic profiles in this area, we recognized a regional detachment fault located at a depth of 9-10 km in the Presinian basement of the Suining area, transferring its slipping from NW to SE orientation. This detachment fault slipped from NW to SE, and underwent several shears and bends, which caused the basement to be rolled in and the overlaying strata fold deformation. It formed a fault-bend fold in the Moxi area with an approximate slip of 4 km. Correspondingly, the formation of the Moxi anticline is related to the detachment fault. With the earthquake＇s epicenter on the ramp of the detachment fault, there is a new point of view that the Suining earthquake was caused by re-activation of this basement detachment fault. Since the Late Jurassic period, under the influence of regional tectonic stress, the detachment fault transfered its slip from the Longmen Mountains （LMS） thrust belt to the hinterland of the Sichuan Basin, and finally to the piedmont zone of southwest Huayingshan （HYS）, which indicates that HYS might be the final front area of the LMS thrust belt.

关键词： Suining Ms5.0 earthquake Seismic interpretation Detachment fault Moxi anticline Longmen Mountains Sichuan Basin

Sediment Compaction and Pore Pressure Prediction in Deepwater Basin of the South China Sea: Estimation from ODP and IODP Drilling Well Data

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Journal of Ocean University of China 2018年第1期17卷 25-34页

作者： XIE Yangbing WU Tuoyu sun Jin ZHANG Hanyu WANG Jiliang GAO jinwei CHEN Chuanxu Laboratory of Marine Geophysics and Georesources Institute of Deep-Sea Science and Engineering Chinese Academy of Sciences Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and Technology Department of Earth and Environment Sciences University of Windsor ON

Overpressure in deepwater basins not only causes serious soft sediment deformation, but also significantly affects the safety of drilling operations. Therefore, prediction of overpressure in sediments has become an important task in deepwater oil exploration and development. In this study, we analyze the drilling data from ODP Leg 184 Sites 1144, 1146, and 1148, and IODP Leg 349 Sites U1431, U1432, U1433, and U1435 to study the sediment compaction and controls in the northern South China Sea. Sedimentation rate, sediment content, distribution area, and buried depth are the factors that influence sediment compaction in the deepwater basin of the South China Sea. Among these factors, the sediment content is the most important. The fitted normal compacted coefficients and mudline porosity for an interval of 50 m shows disciplinary variation versus depth. The pore pressure predicted from different fitted results shows varying overpressure situations. The normal compaction trend from Site 1144 reflects the porosity variation trend in stable deposition basins in the northern South China Sea. The predicted pore pressure shows overpressure at Site 1144, which is attributed to compaction disequilibrium. Nevertheless, the mixed lithology column may influence the predicted overpressure at Site 1148, which is responsible for the confusing result. Above all, we find that sediment compaction should serve as a proxy for pore pressure in the deepwater basin of the South China Sea.

关键词： normal compaction pore pressure prediction deepwater basin South China Sea