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1.
Enzo Cartapati 《地震工程与工程振动(英文版)》2012,11(2):289-290
This discussion will address two aspects found in the paper:lack of proper information and some mistakes.
Lack of proper information
In Section 2 of the paper,a short review of the seismic events suffered by the Basilica and of the interventions of reconstruction which have followcd is presented,but the main effects of these events are not sufficiently highlightcd.In what follows,additional information is provided to allow a better understanding of the most recent retrofit intervention and of the seismic behavior of the Basilica in 2009. 相似文献
2.
The authors thank the discusser for his interest and careful review of the paper and his valuable comments.They also welcome this discussion,because it gives the authors the opportunity to clarify several points which were not explained in sufficient detail in the paper,due to space limitations.
The paper does not provide any personal or professional criticism of the discusser or his work and if any statement may have raised an ambiguous interpretation,this should be clarified and dismissed.Any inaccuracy in the reference's citation was not intentional.Some of the authors do not speak Italian;therefore they could not read directly and understand the paper cited by the discusser,which is in Italian. 相似文献
3.
Ping Jianjun 《中国地震研究》2004,18(2):188-199
Based on the extraction and calculation of the short-term seismic precursory information magnitude from the 114 major precursory observations in the North China region, and together with consideration of factors such as geological structure, seismicity, crustal thickness, and in particular, the current geodynamics of the region, the authors studied the time-space evolutionchara cteristics of the short-term earthquake precursory information magnitude and its relationship with earthquakes and proposed the index and method for the short-term synthetic prediction of earthquakes with Ms ≥ 5.0 in the North China region. The inspection through Rvidue shows that the method is effective to a effective to a certain extent for earthquake prediction. 相似文献
4.
Rainfall and Obtaining Information Regarding Earthquake Development Processes from Groundwater Level
Many factors can cause changes of groundwater level, such as the development process of an earthquake, rainfall, solid earth tides etc. Among these we are interested in information regarding earthquake development processes. Eliminating the influence of various disturbance factors is an effective way to obtain seismic development process information contained in the groundwater level. This paper provides two different ways to remove the rainfall effect, and compares the two methods by means of correlation analysis. Furthermore, based on these a logistic regression model is established to describe the seismicity level. 相似文献
5.
Active faults in Quaternary unconsolidated sediments are important indicators to determine paleoearthquake events,They can be studied by macroscopic geological survey,but some problems have been encountered,such as invisible active faults.The authors found an approach to solve these problems by microstructural observation.Firstly,oriented original-state samples of Quaternary Unconsolidated sediments in active fault zones are collected.Secondly,the samples are consolidated in laboratory.Thirdly,microstructureal slides are gound in three-dimension coordinate system.Lastly,microstructures are observed in the microscopic field.By this method,the movement properties of active faults can be determined in lack of the support of macroscopic data.The invisible faults in Quaternary unconsolidated sediments can be found and described.The mechanisms of die-out faults can be also studied.oreover,the boundaries between different unconsolidated sediments in engineering sites can be studied to judge whether they are active faults or not. 相似文献
6.
The 2009 L’Aquila, Italy earthquake highlighted the seismic vulnerability of historic masonry building structures due to improper "strengthening" retrofit work that has been done in the last 50 years. Italian seismic standards recommend the use of traditional reinforcement techniques such as replacing the original wooden roof structure with new reinforced concrete (RC) or steel elements, inserting RC tie-beams in the masonry and new RC floors, and using RC jacketing on the shear walls. The L’Aquila earthquake revealed the numerous limitations of these interventions, because they led to increased seismic forces (due to greater additional weight) and to deformation incompatibilities of the incorporated elements with the existing masonry walls. This paper provides a discussion of technical issues pertaining to the seismic retrofit of the Santa Maria di Collemaggio Basilica and in particular, the limitations of the last (2000) retrofit intervention. Considerable damage was caused to the church because of questionable actions and incorrect and improper technical choices. 相似文献
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8.
Tugce Baser Kamran Nawaz Albert Chung Seikh Faysal Ozgun Alp Numanoglu 《地震工程与工程振动(英文版)》2023,(4):867-881
This study focuses on the field reconnaissance efforts for investigating ground deformation behavior and building foundation performance in Iskenderun. Many structures experienced significant damage or collapsed due to strong ground shaking in the coastal Iskenderun district of Hatay during the 2023 Kahramanmaras earthquake sequence. Many buildings were also impacted by ground failure due to liquefaction of deposits in the area. Preliminary information regarding the general subsurface profile an... 相似文献
9.
We discussants appreciate the authors’ investigation on the impacts of the vegetated channel walls and aspect ratio on flow velocity profiles,shear stress distribution and roughness coefficient of channel.The primary aim of this comment is to emphasize some of the points which were not considered by the authors during their study.The discussers would like to mention the following points regarding the paper. The expression of "wall vegetation" is a new term for the current literature.However the researchers have not given enough explanation about wall-vegetation.What is "wall vegetation"?Where can we observe wall-vegetation in nature?What are the characteristic species as "wall-vegetation"?We think that the clarification of this point will significantly improve the benefit of this study. 相似文献
10.
Information flow and controlling in regularization inversion of quantitative remote sensing 总被引：1，自引：0，他引：1
YANG Hua XU Wangli ZHAO Hongrui CHEN Xue & WANG Jindi Research Center for Remote Sensing GIS School of Geography Beijing Normal University State Key Laboratory of Remote Sensing Science Beijing Key Laboratory for Remote Sensing of Environment Digital Cities Beijing China Department of Mathematics Beijing Normal University Beijing China 《中国科学D辑(英文版)》2005,48(1):74-83
In order to minimize uncertainty of the inversed parameters to the largest extent by making full use of the limited information in remote sensing data, it is necessary to understand what the information flow in quantitative remote sensing model inversion is, thus control the information flow. Aiming at this, the paper takes the linear kernel-driven model inversion as an example. At first, the information flow in different inversion methods is calculated and analyzed, then the effect of information flow controlled by multi-stage inversion strategy is studied, finally, an information matrix based on USM is defined to control information flow in inversion. It shows that using Shannon entropy decrease of the inversed parameters can express information flow more properly. Changing the weight of a priori knowledge in inversion or fixing parameters and partitioning datasets in multi-stage inversion strategy can control information flow. In regularization inversion of remote sensing, information matrix based on 相似文献
11.
Study on NDVI-T_s space by combining LAI and evapotranspiration 总被引：1，自引：1，他引：1
Vegetation index and land surface temperature (Ts) are important parameters for land surface process modeling. The remotely sensed data in visible/near infrared and thermal infrared wavelengths have proven to be well suited to monitoring vegetation status, soil surface moisture conditions, drought and crop yield. More useful information can be created by integrated analyses of these two kinds of data, which will help us to study main principles of the temporal and spatial variations of land su… 相似文献
12.
Introduction In his Doctor thesis, PAN (2000) has roughly studied some about the influence of parameter uncertainty on seismic hazard analysis. The aim of this paper is especially to study the uncertainty influence extent of seismic hazard analysis result in a spot, owing to the uncertainty of seismicity parameters induced by variational statistical time ranges of various statistical regions in the whole country. The authors have inquired into the uncertain extents of influence of seismic p… 相似文献
13.
Izuru Takewaki 《地震工程与工程振动(英文版)》2013,12(3):501-501
The authors presented an interesting aspect in viscous or visco-elastic damper optimization under earthquake excitation. They also reviewed the research development in the field of passive damper optimization. 相似文献
14.
Introduction Seismic recording is the information recorded by seismograph when earthquake occurs, which is a kind of comprehensive information, including the characteristics of earthquake focus, propagation path of seismic wave and site response, etc. Therefore, we must try to distinguish source effect, propagation path and site response in the seismic recordings in order to obtain accu-rate parameters. The method of Atkinson has better solved the problem (Atkinson, Mereu, 1992), which is bas… 相似文献
15.
《中国地震研究》1994,(1)
In this paper,the authors have summarized the kinematic and dynamic features of seismic waves observed by downhole seismometers in China.The features of seismic waves recorded on ground and downhole as well as in soil layer and bedrock layer,including amplitude,traveltime,spectrum and wave field are discussed individually and then explained integrally in term of the effects of soft covering layer.This research result has been applied to the establishment of downhole seismic stations,the location of fractures in oil fields and the measurement of seismic focus parameters and structural parameters of media. 相似文献
16.
Zhou Shiyong Zhu LingrenSeismological Bureau of Xinjiang Uygur Autonomous Region Urumqi China 《中国地震研究》1996,(2)
During the preparation process of a great earthquake, there are certain patterns of less randomness but more order in the space-time distribution of micro-earthquakes, which had been proved by seismic events and experiments. The information entropy concerning the dimension of the order in seismic distribution is systematically defined from the point of modern statistical physics in this paper. Relations of dynamic variations of information entropy with a strong shock occurrence time and the distribution of information with a strong shock occurrence place were approached through seismic data from the Wuqia, Xikar, Wushi, and Manasi regions in Xinjiang. It is indicated that before strong earthquakes, the value of information entropy often noticeably drops in seismic region, and generally much lower in the epicentral area than the surrounding regions. These two characters are of important significance in strong shock risk region determination and large shock tendency prediction. 相似文献
17.
In the Rhine-Meuse delta in the south-western part of the Netherlands,the morphology of the river branches is highly dependent on the erodibility of the subsoil.Erosion processes that were initiated after closure of the Haringvliet estuary branch by a dam(in 1970),caused a strong incision of several connecting branches.Due to the geological evolution of this area the lithology of the subsoil shows large variations in highly erodible sand and poorly erodible peat and clay layers.This study shows how the geological information can be used to create 3D maps of the erodibility of the sub-soil, and how this information can be used to schematize the sub-soil in computational models for morphological simulations.Local incisement of sand patches between areas with poorly erodible bed causes deep scour holes,hence increasing the risk on river-bank instability(flow slides) and damage to constructions such as groynes,quays,tunnels, and pipelines.Various types of mathematical models,ranging from 1D(SOBEK) to quasi-3D(Delft3D) have been applied to study the future development of the river bed and possible management options.The results of these approaches demonstrate that models require inclusion of a layer-bookkeeping approach for sub-soil schematization, non-uniform sediment fractions(sand-mud),tidal and river-discharge boundary conditions,and capacity-reduction transport modeling.For risk-reducing river management it has been shown how the development of the river bed can be addressed on a large scale and small scale.For instance,the use of sediment feeding and fixation of bed can be proposed for large-scale management,while monitoring and interventions at initiation of erosion can be proposed as response to small-scale developments that exceed predefined intervention levels. 相似文献
18.
P. H. Santschi 《中国科学D辑(英文版)》2005,48(4)
Recent sediments in lakes and gulfs are a sensi-tive recorder of the information about environmentalchanges in the catchment areas during recent geologi-cal history. Precise determination of the ages of sedi-ments is the key to deciphering the environmental re-cords. The 210Pb dating technique and the markertechnique based on fallout radionuclide 137Cs havefound wide applications in sedimentation rate on atime scale of several tens to one hundred years, as wellas the varve chron… 相似文献
19.
Introduction The observation records of strong ground motion previously, on the one hand, supplied basicdata both to research on earthquake engineering and to constitute the criterion of aseismatic de-signing of all project structures; on the other hand, it provided important information for the re-search on the process of epicenter burst in seismology. With the development of research on strongground motion observation, especially the development of the new generation accelerograph,which… 相似文献
20.
Introduction The accumulation of high precision GPS data has great significance for understanding and explaining crustal movement and establishing the geodynamical model correctly. However, it is an important basic task to study block movement with the displacement data which covers the datum influence information, as well as the deformation information of the block and abnormal deforma-tion information in the block such as fault or zone of fracture and so on. Firstly steady or com-parativel… 相似文献