Seasonal variations of Aulacoseira granulata population abundance in the Pearl River Estuary     

Chao Wang  Xinhui LiZini Lai  Xichang TanShixun Pang  Wanling Yang 《Estuarine, Coastal and Shelf Science》2009

  相似文献   

Tyrosinase, a new innate humoral immune parameter in large yellow croaker （Pseudosciaena crocea R）     

王淑红  王艺磊  张子平  谢芳靖  林鹏  邰振刚 《中国海洋湖沼学报》2009,27(3):527-535

We evaluated the immune response to infection with a pathogen in large yellow croaker(Pseudosciaena crocea Richardson).The fish were given an intraperitoneal(i.p.) injection of Vibrio parahaemolyticus or sterile sea water(control).We collected blood sera from the fish 0.17,1,2,4,8,12,or 16 d after injection(dpi).We measured tyrosinase activity and the concentrations of lysozyme,NOS,and antibodies.Serum tyrosinase activity was significantly higher at 0.17 and 4 dpi than in the control group,and peaked at 8 d...  相似文献   

中国海岸带综合管理指标体系构建的初步研究   总被引：1，自引：0，他引：1  

魏莱  魏皓 《海岸工程》2009,28(2):25-33

将"驱动力-压力-状态-影响-响应"(DPSIR)框架应用于构建中国海岸带综合管理(ICZM)指标体系中是一个新的研究领域.在介绍我国海岸带生态环境恶化的状况和DPSIR框架应用的基础上,构建了包含4类驱动力指标、5类压力指标、6类状态指标、2类影响指标、5类响应指标的"中国ICZM指标体系", 以期能为我国的ICZM提供一种简化的概念框架.  相似文献   

重庆荣昌井水温同震-震后响应特征及机理研究     

巩浩波  来贵娟  李翠平  李光科 《中国地震》2022,38(4):737-750

利用位于华蓥山断裂带的重庆荣昌井水温数字化分钟值观测资料,统计分析了该井水温对2008年1月—2021年9月全球M_S≥7.0、川滇地区M_S≥6.0、重庆及周边地区M_S≥4.0共273次地震的同震-震后响应动态特征,对井水温同震优势方向成因和机理进行了深入研究,获得以下认识:(1)荣昌井水温同震-震后响应能力较好,对近震和远震均可记录到;该井水温同震响应由深及浅的顺序发生,响应持续时间随观测深度的增加而增加,响应幅度随观测深度的增加而减小,且该井水温同震-震后响应持续时间较同井水位的长;(2)自观测以来,荣昌井多层水温同震响应方向均为上升,说明单个井水温对不同地震的同震响应存在优势响应方向,水温的同震特征更依赖于井孔自身观测条件的影响;荣昌井水温同震响应优势方向上升可能是地震波的扰动造成井下深部气体释放,并沿裂隙上升进入井含水层系统而引起;(3)荣昌井水位-水温对中、远场地震的同震为同向上升正相关关系或振荡—上升,对近场地震的同震为水位下降—水温上升的反相关关系,可能是近场地震和中、远场地震引起的水位同震响应变化机制不一致...  相似文献   

Research status of earthquake forecasting in hydraulicfracturing induced earthquakes          下载免费PDF全文

Qian Wang  Xinxin Yin  Changsheng Jiang  Cong Jiang  Yan Zhang  Hongyu Zhai  Yanbao Zhang  Guijuan Lai  Fengling Yin 《地震科学（英文版）》2021,34(3):286-298

In the new types of industrial activities including unconventional energy extraction associated with shale gas and hot dry rock, gas reservoir operations, CO2 geological storage, undergoing research on induced earthquake forecasting has become one of the forward positions of current seismology. As for the intense actual demand, the immature research on induced earthquake forecasting has already been applied in pre-assessment of site safety and seismic hazard and risk management. This work will review systematically recent advances in earthquake forecasting induced by hydraulic fracturing during industrial production from four aspects: earthquake occurrence probability, maximum expected magnitude forecasting, seismic risk analysis for engineering and social applications and key scientific problems. In terms of earthquake occurrence probability, we introduce statistical forecasting models such as an improved ETAS and non-stationary ETAS and physical forecasting models such as Seismogenic Index (SI) and hydro-mechanism nucleation. Research on maximum expected magnitude forecasting has experienced four stages of linear relationship with net injection volume of fluid, power exponential relationship and physical forecasting regarding fault parameters. For seismic risk analysis, we focus on probabilistic seismic hazard assessment and quantitative geological susceptibility model. Furthermore, this review is extended to key scientific problems that contain obtaining accurate fault scale and environmental stress state of reservoir, critical physical process of runaway rupture, complex mechanism of fault activation as well as physical mechanism and modeling of trailing effect. This work in understanding induced earthquake forecasting may contribute to unconventional energy development and production, seismic hazard mitigation, emergency management and scientific research as a reference.  相似文献   

Exploring Earth’s boundaries with Donald V. Helmberger          下载免费PDF全文

Voon Hui Lai 《地震科学（英文版）》2022,35(1):63-66

  相似文献   

Machine-learning-enabled discrete element method: Contact detection and resolution of irregular-shaped particles     

Zhengshou Lai  Qiushi Chen  Linchong Huang 《国际地质力学数值与分析法杂志》2022,46(1):113-140

  相似文献