检索结果-南通市图书馆

2.09 9th International Conference on Electronic Measurement & Instruments（ICEMI’2.09）

作者： Meng Wang 1 2.Ming Deng 1 2.Qisheng Zhang 1 2.Kai Chen 1 2.1. Key Laboratory of Geo-detection(China University of Geosciences Beijing) ministry of education 2. China University of Geosciences Beijing School of Geophysics and Information Technology China University of Geosciences. No.2. Xueyuan Road Handian District Beijing

As a potential strategic resource in the future, natural gas hydrates has been highly appreciated by governments and scientists all over the world. The Marine Controlled Source Electromagnetic （CSEM） method has become one of the high techniques to explore this resource in seas. This paper presents the developed equipment for marine CSEM, including the towing controlled source electromagnetic emitter and receiver, as a part of the National 863 Program Marine CSEM survey technology for natural gas hydrates （2.06AA09A2.1）. Based on the EM theory, the measured field sources in a large range are correlated at the same time. To measure the regional field source signals accurately, it is required that the working clocks between the emitter and receiver as well as between different receivers must be consistent, so that the subsequent data processing and interpretation will have unified time coordinates. Much different from surveying on land, the instruments on seafloor for marine CSEM survey cannot receive GPS signals from satellites. Thus we need to study the synchronization technology for the instruments on seafloor. It contains two items. One is to perform time lock to the emitter and receiver consistent with the GPS time and put the GPS time into RTC chip before the instrument is put into the sea. The other is to keep the inner clocks of all instruments on seafloor absolutely consistent with errors less than 10 -8 s/s during the whole survey period （about half a month）, so that the emitter sends out controlled source signals and the receiver gets the signal both at planned times accurately. The development and realization of the technology mentioned above ensure the temporal consistency of the marine survey network, providing a unified time base for subsequent data inversion and interpretation.

关键词： Marine CSEM CSEM emission CSEM reception Time lock Synchronization.

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

优化试卷结构设计突出思维能力考查——2.2.年高考数学全国卷试题评析

引用

中国考试 2024年第7期 79-85页

作者： National education Examinations Authority 教育部教育考试院

2.2.年高考数学试题落实高考内容改革要求,贯彻考主干、考能力、考素养,重思维、重创新、重应用的指导思想,采用全新的试卷结构,减少试题数量,降低计算量,创新试题设计,加强思维考查力度,强化素养导向,服务拔尖创新人才选拔,助推素质教... 详细信息

2.2.年高考数学试题落实高考内容改革要求,贯彻考主干、考能力、考素养,重思维、重创新、重应用的指导思想,采用全新的试卷结构,减少试题数量,降低计算量,创新试题设计,加强思维考查力度,强化素养导向,服务拔尖创新人才选拔,助推素质教育发展。

关键词：高考内容改革高考数学思维能力拔尖创新人才选拔

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The integration of methanogenesis with denitrification and anaerobic ammonium oxidation in an expanded granular sludge bed reactor

引用

Journal of Environmental Sciences 2003年第3期15卷 423-432页

作者： ZHANG Dai-jun 1,2.(1. Department of Environmental Science, Chongqing University, Campus A, Chongqing 400044, China 2. Key Laboratory for the Southwest China Resources Exploitation and Environmental Disaster Control Engineering, ministry of education, China.) Department of Environmental Science Chongqing University China

The integration of methanogenesis with denitrification and anaerobic ammonium oxidation(ANAMMOX) was studied in an expanded granular sludge bed(EGSB) reactor in this work. Experimental results from the continuous treatment of wastewater with nitrite and ammonium, which lasted for 107 days, demonstrated that wastewater with high nitrite and ammonium could be anaerobically treated in an expanded granular sludge bed reactor. More than 91% to 97% of COD were removed at up to about 3.9 g COD/(L·d) of COD volumetric loading rate. More than 97% to 100% of nitrite was denitrified at up to about 0.8 g NO -_2.N/(L·d), which is 16 times higher than that in a conventional activated sludge system with nitrification/denitrification(0.05 gN/(L·d)). No dissimilatory reduction of nitrite to ammonium occurred in the process. However, maximum of about 40% ammonium was found to be lost. Batch tests of 15 days with sludge from the reactor showed that 100% of nitrite was denitrified completely, and about 3% of ammonium was removed when only ammonium (34.3 mg/L) and nitrite(34.3 mg/L) were added into the sludge suspension medium. Furthermore, about 15% of ammonium amounts were lost with organic COD addition. It suggested that the methanogenesis in the system could enhance ANAMMOX because of intermediate hydrogen produced during methanogenesis.

关键词： methanogenesis denitrification ANAMMOX EGSB reactor

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

聚焦铸魂育人功能着力思维品质提升——2.2.年高考文科综合全国卷试题评析

引用

中国考试 2024年第7期 97-102页

作者： National education Examinations Authority 教育部教育考试院

2.2.年高考文科综合全国卷命题贯彻党的二十大精神和党的教育方针,通过有机融入习近平新时代中国特色社会主义思想,突出“五史”教育,铸牢中华民族共同体意识,弘扬中华优秀传统文化,落实立德树人根本任务。通过增强试题的开放性、综合性... 详细信息

2.2.年高考文科综合全国卷命题贯彻党的二十大精神和党的教育方针,通过有机融入习近平新时代中国特色社会主义思想,突出“五史”教育,铸牢中华民族共同体意识,弘扬中华优秀传统文化,落实立德树人根本任务。通过增强试题的开放性、综合性,创新设问方式、情境设计,突出对辩证思维、逻辑思维、创新思维等思维品质的考查引导,服务人才选拔与培养的质量提升。坚持依标命题,强调考查内容与课程标准相一致,考查要求与学业质量标准和教学实际相对接,助推课程改革平稳实施。

关键词：高考文科综合考试立德树人人才选拔考教衔接

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

坚持思想铸魂激发科学精神彰显语文实践——2.2.年高考语文全国卷试题评析

引用

中国考试 2024年第7期 72-78页

作者： National education Examinations Authority 教育部教育考试院

2.2.年高考全国卷语文试题发挥学科优势,坚持以习近平新时代中国特色社会主义思想铸魂育人,激励学生在实现中华民族伟大复兴的进程中开拓创新、奋发有为。试题突出对创新性思维品质的考查,引导学生掌握科学的世界观和方法论,学会正确的... 详细信息

2.2.年高考全国卷语文试题发挥学科优势,坚持以习近平新时代中国特色社会主义思想铸魂育人,激励学生在实现中华民族伟大复兴的进程中开拓创新、奋发有为。试题突出对创新性思维品质的考查,引导学生掌握科学的世界观和方法论,学会正确的思想方法,激发学生探索精神。各套试卷注重语文实践,创设生活情境,通过多种方式考查学生在真实情境中的语言运用能力。

关键词：高考试题内容改革语文实践试题评析

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

加强科学素养考查提高人才选拔质量——2.2.年高考理科综合全国卷试题评析

引用

中国考试 2024年第7期 91-96页

作者： National education Examinations Authority 教育部教育考试院

2.2.年高考理科综合全国卷试题落实立德树人根本任务,展现我国传统文化成果和科技成就,激发学生强国之志,发挥高考育人功能。试题加强考查科学素养,注重引导学生进行科学研究和实验探究,鼓励其运用所学知识解决生产生活中的实际问题,培... 详细信息

2.2.年高考理科综合全国卷试题落实立德树人根本任务,展现我国传统文化成果和科技成就,激发学生强国之志,发挥高考育人功能。试题加强考查科学素养,注重引导学生进行科学研究和实验探究,鼓励其运用所学知识解决生产生活中的实际问题,培养创新思维,激发学生崇尚科学、探索未知的兴趣。试题命制遵循高中课程标准,强化对学科必备知识的考查,引导教学回归基础,回归课堂,提质增效。

关键词：高考高考理科综合科学素养教考衔接

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

聚焦立德树人突出思维考查发挥导向作用——2.2.年高考英语全国卷试题评析

引用

中国考试 2024年第7期 86-90页

作者： National education Examinations Authority 教育部教育考试院

2.2.年高考英语科坚持落实立德树人根本任务,贯彻高考内容改革要求,引导学生德智体美劳全面发展。试题深化基础知识和关键能力考查,强化思维品质考查,服务国家人才选拔培养,加强教考衔接,发挥对高中英语教学的正向引导作用,助力教育高... 详细信息

2.2.年高考英语科坚持落实立德树人根本任务,贯彻高考内容改革要求,引导学生德智体美劳全面发展。试题深化基础知识和关键能力考查,强化思维品质考查,服务国家人才选拔培养,加强教考衔接,发挥对高中英语教学的正向引导作用,助力教育高质量发展。

关键词：高考英语立德树人思维品质人才选拔培养教考衔接

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Kinematics and dynamics of the Mesozoic orogeny and late-orogenic extensional collapse in the Sino-Mongolian border areas

引用

Science China Earth Sciences 2005年第7期48卷 849-862页

作者： ZHENG Yadong 1 & WANG Tao2.1. Key Laboratory of Orogenic Belts and Crustal Evolution (Peking University), ministry of education, Beijing 100871, China 2. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China Key Laboratory of Orogenic Belts and Crustal Evolution (Peking University) Ministry of Education Beijing 100871 China Institute of Geology Chinese Academy of Geological Sciences Beijinq 100037 China

The Sino-Mongolian border areas underwent two important tectonic events during Mesozoic time after late Paleozoic orogeny: a late Triassic to earlier Jurassic contractional event that resulted in a large-scale south-vergent thrust during the orogeny and a late Jurassic-earlier Cretaceous extensional event in a north-south direction that formed a metamorphic core complex. The kinematic and dynamic analyses show that the thrust sheet moved southwards with a kinematic vorticity number of ca. -0.10 and sub-horizontal maximum compressive stress axis that belongs to a contraction-thickening shear. The upper plate of the late-orogenic detachment relatively moved in a 165°direction. The average kinematic vorticity in its earlier stage was 0.74 that belongs to simple shear dominated shearing and related to the maximum compressive stress axes dipping at ～66°, while the later average kinematic vorticity was ～0.55°that belongs to pure shear dominated shearing with sub-vertical maximum compressive stress axes. This suggests that the thrusting led to the crust thickened and the lower plate rocks that were originally located in the upper crust depressed through a brittle-ductile transition zone into the lower crust and became warmer. The heated rocks trended to uplift since their increasing volume and decreasing density while the loading of the upper-plate rocks increased due to the structural thickening. Under the combined effect of the loading and the thermal-uplifting, the ductile shear zone in between increased in its component of vertical pure shear. Once its pure-shear component exceeded its simple-shear one the ductile shear zone became an extension-thinned shear zone. This progressive transitional process reflects internal and essential temporal and spatial relationships: the extensional factor nucleated during the crust thickening by thrusting and increase of the extensional factor finally led to late-orogenic collapse.

关键词： Mesozoic thrusting,late-orogenic collapse,kinematic vorticity number,stress state.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Two-dimensional thermoelasticity solution for functionally graded thick beams

引用

Science China(Physics,Mechanics & Astronomy) 2006年第4期49卷 451-460页

作者： Lü Chaofeng1, CHEN Weiqiu1 & ZHONG Zheng2.1. Department of Civil Engineering, Zhejiang University, Hangzhou 31002., China 2. Key Laboratory of Solid Mechanics of ministry of education, School of Aerospace Engineering and Ap- plied Mechanics, Tongji University, Shanghai 2.0092. China Department of Civil Engineering Zhejiang University Hangzhou 310027 China Key Laboratory of Solid Mechanics of ministry of education School of Aerospace Engineering Applied Mechanics Tongji University Shanghai 200092 China

Two-dimensional thermoelasticity analysis of functionally graded thick beams is presented using the state space method coupled with the technique of differential quadrature. Material properties vary continuously and smoothly through the beam thickness, leading to variable coefficients in the state equation derived from the elasticity equations. Approximate laminate model is employed to translate the state equation into the one with constant coefficients in each layer. To avoid numerical instability, joint coupling matrices are introduced according to the continuity conditions at interfaces in the approximate model. The differential quadrature procedure is applied to discretizing the beam in the axial direction to make easy the treatment of arbitrary end conditions. A simply-supported beam with exponentially varying material properties is considered to validate the present method. Numerical examples are performed to investigate the influences of relative parameters.

关键词： state equation differential quadrature approximate laminate model joint coupling matrices thermal stresses.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Quick image-processing method of UAV without control points data in earthquake disaster area

引用

中国有色金属学会会刊：英文版 2011年第S3期21卷 523-528页

作者： LI Chang-chun1, ZHANG Guang-sheng1, LEI Tian-jie2. 3, GONG A-du2. 3 1. School of Surveying & Land Information Engineering, Henan Polytechnic University, Jiaozuo 454000, China 2. Key Laboratory of Environmental Change and Natural Disaster, ministry of education, Beijing Normal University, Beijing 100875, China 3. ministry of Civil Affairs/ministry of education of China Academy of Disaster Reduction and Emergency Management, Beijing Normal University, Beijing 100875, China [a] School of Surveying & Land Information Engineering Henan Polytechnic University Jiaozuo 454000 China [b] Key Laboratory of Environmental Change and Natural Disaster Ministry of Education Beijing Normal University Beijing 100875 China [c] ministry of Civil Affairs/ministry of {2. of China Academy of Disaster Reduction and Emergency Management Beijing Normal University Beijing 100875 China

The methods of unmanned aerial vehicles images splicing rapidly and rectifying without control points data, only using auxiliary data recorded by unmanned aerial vehicle (UAV) system, were researched. Two algorithms were proposed, including UAV images auto- splicing rapidly after image blocking and UAV images rectifying based on pseudo center points of auxiliary data. When SIFT algorithm for UAV images splicing is applied, the accuracy is very high, but the efficiency is very low. The splicing efficiency is improved greatly based on SIFT algorithm after image blocking. The results show that rectifying accuracy is very high and has no visual dislocation when pseudo center points of auxiliary data is applied.

关键词： unmanned aerial vehicles SIFT algorithm blocking quickly splicing rectification

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：