无功补偿技术在区域气象中心供电系统中的应用   总被引：1，自引：1，他引：0  

仉安娜  唐远明  闫国祥  张玉锦  张诗甫  刘其海 《气象与环境学报》2007,23(1):34-38

介绍了供电保障系统在沈阳区域气象中心业务中的重要作用及无功补偿的基本原理,概述了在应用设计中选择无功补偿装置的配置地点及智能式复合开关无功补偿成套装置的性能、结构及特点,并从减少输电线路和变压器的损耗、增加变压器及输电线路的利用率、改善电压质量、获得力率电费奖励4个方面分析了无功补偿的经济价值。应用表明:采用无功补偿技术可节约资金20多万元,达到了预期改造的目的,经济效益和社会效益较为显著。  相似文献   

上海陆域古河道分布及对工程建设影响研究     

史玉金 《工程地质学报》2011,19(2):277-283

上海地区第四纪时期古河道发育,其中晚更新世以来的古河道对工程建设影响最大.根据大量钻孔及测试资料,研究了晚更新世末期古河道、全新世晚期吴淞江古河道和近代古河道的成因、分布规律及沉积物特征.在此基础上,结合上海市工程建设特点,系统分析了古河道对工程建设,尤其是地下空间开发的影响,成果可为工程勘察、设计、施工提供基础地质依...  相似文献   

标准化气象数据服务接口设计与实现     

许皓皓  姚日升  沃伟峰 《气象科技》2018,46(4):685-691

为统一气象应用系统数据对接方式,规范气象数据使用环境,以国省两级气象信息化行动方案为纲领,采用Spring Boot和Spring Cloud微服务框架,设计和开发了标准化气象数据服务接口。标准化气象数据服务接口遵循气象信息化标准体系,采集和加工各类气象数据后汇入气象数据资源池,统一通过RESTful API发布数据,为全宁波市气象应用系统提供标准化数据对接服务。该接口改变了应用程序直接读取数据库的旧模式,降低了应用系统的开发成本,同时加强了运维部门对各类气象数据访问的监控和管理。文章主要介绍了气象数据服务接口的设计和开发过程,并详细描述了开发过程中涉及的接口规范、业务流程和关键技术。  相似文献   

Neoarchean Magmatic Events in the Western Songnen Massif,Central Asian Orogenic Belt: Timing and Tectonic Significance     

WU Xinwei  LIU Zhenghong  LIU Yongjiang  ZHANG Chao  SHAO Jun  ZHANG Chao  ZHANG Yujin  GUO Wei  LIU Baoshan  ZHANG Guangyu 《《地质学报》英文版》2023,97(2):436-448

Whether a Neoarchean basement existing in the Songnen massif is currently debated. Identification of Archean magmatism from the Songnen Massif is helpful to resolve this issue. Here, we report newly discovered Neoarchean Shanquan pluton in the Western Songnen Massif. These Neoarchean Shanquan pluton are mainly composed of granites that are exposed near the town of Shanquan in Heilongjiang Province. LA-ICP-MS zircon U-Pb dating reveals that the sample 2015TW1 has an upper intercept age of 2801 ± ...  相似文献   

联合InSAR技术和地质数据反演普宁城区的地表沉降特征     

李冰峰  杨映新  王冬凯  伍玉金  张志友 《测绘通报》2021,(6):83-88

地表沉降是全球性的地质灾害之一,地表的迅速沉降会导致地表塌陷,从而破坏地下管道及地表建筑,最后造成巨大的经济损失甚至人员伤亡。我国地下工程及地表建筑扩建规模较大,这种地质灾害问题尤为突出。目前,监测地表形变的方法有很多,如水准测量、GPS、InSAR技术等。但通常情况下这些技术只能对地表的高程变化进行定量分析,而无法寻找灾害发生的诱因,缺少对地表沉降时空特征的定性分析。本文以广东普宁地区为例,将InSAR技术与该地区的水文地质特征相结合,从而实现对地表沉降监测从数据采集、处理到成因分析的整个流程的把控。InSAR技术可以验证地质特征的合理性,而地质特征又可以对监测范围及监测周期进行更科学的指导。本文通过这种分析方法,既调查出普宁城区的沉降区域,又对其背后成因进行了系统性的分析,为后续的防治措施及国土空间规划提供了更科学的指导。  相似文献   

Three‐dimensional texture of natural pseudotachylyte: Pseudotachylyte formation mechanism in hydrous accretionary complex          下载免费PDF全文

Yohei Hamada  Gaku Kimura  Jun Kameda  Asuka Yamaguchi  Mari Hamahashi  Rina Fukuchi  Yujin Kitamura  Shin'ya Okamoto 《Island Arc》2018,27(2)

Melt‐origin pseudotachylyte is the most reliable seismogenic fault rock. It is commonly believed that pseudotachylyte generation is rare in the plate subduction zone where interstitial fluids are abundant and can trigger dynamic fault‐weakening mechanisms such as thermal pressurization. Some recent studies, however, have discovered pseudotachylyte‐bearing faults in exhumed ancient accretionary complexes, indicating that frictional melting also occurrs during earthquakes in subduction zones. To clarify the pseudotachylyte generation mechanism and the variation of slip behavior in the plate subduction zone, a pseudotachylyte found in the exhumed fossil accretionary complex (the Shimanto Belt, Nobeoka, Japan) was re‐focused and microscopic and three‐dimensional observations of the pseudotachylyte‐bearing fault were performed based on optical, electron, and X‐ray microscope images. Based on the patterns contained in the fragment, the pseudotachylyte is divided into four domains, although no clear domain boundaries or layering structures are not found. Three‐dimensional observation also suggests that the pseudotachylyte were fragmented or isolated by cataclasite or carbonate breccia. The pseudotachylyte was rather injected into the surrounding carbonate breccia, which is composed of angular fragments of the host rock and a matrix of tiny crystalline carbonate. The pseudotachylyte volume was extracted from the X‐ray microscope image and the heat abundance consumed by the pseudotachylyte generation was estimated at 2.18 MJ/m², which can be supplied during a slip of approximately 0.5 m. These observations and calculations, together with the results of the previous investigations, suggest hydrofracturing and rapid carbonate precipitation that preceded or accompanied the frictional melting. Dynamic hydrofracturing during a slip can be caused by rapid fluid pressurization, and can induce abrupt decrease in fluid pressure while drastically enhancing the shear strength of the shear zone. Consequently, frictional heating would be reactivated and generate the pseudotachylyte. These deformation processes can explain pseudotachylyte generation in hydrous faults with the impermeable wall rock.  相似文献   

Temporal stress variations along a seismogenic megasplay fault in the subduction zone: An example from the Nobeoka Thrust,southwestern Japan          下载免费PDF全文

Ryoji Kawasaki  Yoshitaka Hashimoto  Makoto Otsubo  Asuka Yamaguchi  Yujin Kitamura  Jun Kameda  Yohei Hamada  Rina Fukuchi  Gaku Kimura 《Island Arc》2017,26(3)

The Nobeoka Thrust, an ancient megasplay fault in the Shimanto Belt, southwestern Japan, contains fault rocks from the seismogenic zone, providing an accessible analog of active megasplay faults in deep subduction settings. In this study, the paleostress along the Nobeoka Thrust was analyzed using multiple inversion techniques, including k‐means clustering of fault datasets acquired from drillcores that intersected the thrust. The six resultant stress orientation clusters can be divided into two general groups: stress solutions with north–south‐trending σ₁ axes, and those with east–west‐trending σ₁ axes. These groups are characterized by the temporal changes for the orientations of the σ₁ and σ₃ principal stress axes that involve alternation between horizontal and vertical. The findings are probably due to a change in stress state before and after earthquakes that occurred on the fault; similar changes have been observed in active tectonic settings, such as the 2011 Tohoku‐Oki earthquake (Japan).  相似文献   

大兴安岭南段阿鲁科尔沁旗地区林西组沉积环境特征及其时限的地质意义     

董清水  何春生  楼仁兴  任锡钢  张超  张渝金  许圣传 《吉林大学学报(地球科学版)》2020,50(2):425-441

针对兴蒙—松嫩地区林西组沉积环境、沉积时限及古亚洲洋最终闭合时间等争议问题,通过对阿鲁科尔沁旗罕庙地区林西组的岩性、古生物、微量元素及碎屑锆石U-Pb测年等综合研究认为：林西组发育淡水双壳类和叶肢介化石,微量元素Sr/Ba值主要分布在0.05~0.18之间（平均值为0.12）,B/Ga值主要分布在1.84~3.22之间（平均值为2.50）,V/Cr值介于1.36~2.21之间（平均值为1.81）,其沉积时期应为缺氧或贫氧的淡水湖泊环境。结合林西组砂岩碎屑锆石具有多时代物源特征、最年轻年龄为251 Ma、沉积下限年龄为晚二叠世等特征推测,古亚洲洋在研究区的最终闭合时限应为中二叠世末期,晚二叠世时期研究区即已转化为陆相沉积。  相似文献   

长江河口滨海地区冲填土对地面沉降效应——以上海市临港新城为例   总被引：1，自引：0，他引：1  

史玉金  严学新  周念清 《工程地质学报》2007,15(3):391-394

长江河口滨海地区广泛分布有大量的冲填土,由于其形成时间短,具有欠固结特性,因此对地面沉降影响较大。本文首先阐述上海市临港新城区冲填土分布特征,并按其填料不同将其分类后计算出不同种类冲填土大面积堆载所引起下部土层的地面沉降量和冲填土本身固结产生的沉降量,并与总的地面沉降量相比较,得出结论,并对进一步开展工作提出建议。  相似文献   

福建屏南白水洋地貌特征及成因浅析   总被引：1，自引：0，他引：1  

梁诗经  文斐成  陈斯盾  揭育金  胡祚林  魏勇 《福建地质》2007,26(1):1-11

福建屏南白水洋不仅风光旖旎,更以"浅水广场"遐迩闻名,被誉为"天下绝景,宇宙之谜".经调查研究,白水洋是在地壳运动相对稳定时期由九岭溪和仙耙溪流水长期侵蚀形成的一个平底基岩河床,石英正长斑岩是构成平底基岩河床的物质基础,风化剥蚀、流水侵蚀是形成白水洋的主要外动力地质作用.流水侵蚀作用还形成形态各异的水蚀基岩波痕、水蚀凹槽、壶穴、流水侧蚀凹洞、弧形岸壁、波状岸壁、侵蚀阶地等地貌.  相似文献