In this study, we present a PSHA（Probabilistic Seismic Hazard Analysis） for the city of San Juan, which is located in the central-western region of Argentina（30°S-35.5°S; 66.5°W-71°W）. In addit...In this study, we present a PSHA（Probabilistic Seismic Hazard Analysis） for the city of San Juan, which is located in the central-western region of Argentina（30°S-35.5°S; 66.5°W-71°W）. In addition to crustal earthquakes provided by catalogues, recent paleoseismological and neotectonic investigations have permitted to consider events which occurred during the last 400 years.Four seismogenic sources that could cause damages to the studied site corresponding to Precordillera,Western Sierras Pampeanas, Basement of the Cuyana Basin and Cordillera Principal were identified.Based on the evaluation of the contribution of these sources,maximum moment magnitudes above 7.5（Mw） are expected.High values of SA（spectral acceleration）（0.2 and 1 s periods） and PGA（peak ground acceleration） were found in the city of San Juan, which suggests that it is located in a zone of high seismic hazard.Finally, the obtained SA spectra were compared with the seismic-resistant construction standards of Argentina INPRES-CIRSOC 103 [1]. Results suggest that for the city of San Juan and for a return period of475 years, it covers the seismic requirements of the structures.展开更多
In order to increase the productivity of construction industry, emerging technologies have been constantly introduced and applied in this traditional industry by pilot researchers. This paper provides an integrated mo...In order to increase the productivity of construction industry, emerging technologies have been constantly introduced and applied in this traditional industry by pilot researchers. This paper provides an integrated model of radio-frequency identification (RFID) and four-dimensional Computer-Aided Design (4D CAD) in construction management. RFID involves the use of tags that collect data and transmit data. RFID can collect data by radio waves instead of light waves. RFID technology is surpassing barcode technology where light waves are easily blocked and barcode labels are easy to fall off or become unreadable due to dust, dirt, or other contaminants. 4D CAD which involves 3D construction models and construction schedules presents visualized construction process. Integration of RFID and 4D CAD in this paper built a dynamic construction management and control system which would reduce the time of capturing data on site and control quality of construction materials efficiently. Pilot test result shows that a construction manager can easily understand how and what a complicated construction project will be accomplished. Although further analysis is necessary, RFID and 4D CAD show promises of being a beneficial technology in construction management.展开更多
The optoelectronic memristor integrates the multifunctionalities of image sensing,storage,and processing,which has been considered as the leading candidate to construct novel neuromorphic visual system.In particular,m...The optoelectronic memristor integrates the multifunctionalities of image sensing,storage,and processing,which has been considered as the leading candidate to construct novel neuromorphic visual system.In particular,memristive materials with all-optical modulation and complementary metal oxide semiconductor(CMOS)compatibility are highly desired for energy-efficient image perception.As a p-type oxide material,Cu_(2)O exhibits outstanding theoretical photoelectric conversion efficiency and broadband photoresponse.In this work,an all-optically controlled memristor based on the Cu_(2)O/TiO_(2)/sodium alginate nanocomposite film is developed.Optical potentiation and depression behaviors have been implemented by utilizing visible(680 nm)and ultraviolet(350 nm)light.Furthermore,a 7×9 optoelectronic memristive array with satisfactory device variation and environment stability is constructed to emulate the image preprocessing function in biological retina.The random noise can be reduced effectively by utilizing bidirectional optical input.Beneficial from the image preprocessing function,the accuracy of handwritten digit classification increases more than 60%.Our work presents a pathway toward high-efficient neuromorphic visual system and promotes the development of artificial intelligence technology.展开更多
文摘In this study, we present a PSHA（Probabilistic Seismic Hazard Analysis） for the city of San Juan, which is located in the central-western region of Argentina（30°S-35.5°S; 66.5°W-71°W）. In addition to crustal earthquakes provided by catalogues, recent paleoseismological and neotectonic investigations have permitted to consider events which occurred during the last 400 years.Four seismogenic sources that could cause damages to the studied site corresponding to Precordillera,Western Sierras Pampeanas, Basement of the Cuyana Basin and Cordillera Principal were identified.Based on the evaluation of the contribution of these sources,maximum moment magnitudes above 7.5（Mw） are expected.High values of SA（spectral acceleration）（0.2 and 1 s periods） and PGA（peak ground acceleration） were found in the city of San Juan, which suggests that it is located in a zone of high seismic hazard.Finally, the obtained SA spectra were compared with the seismic-resistant construction standards of Argentina INPRES-CIRSOC 103 [1]. Results suggest that for the city of San Juan and for a return period of475 years, it covers the seismic requirements of the structures.
文摘In order to increase the productivity of construction industry, emerging technologies have been constantly introduced and applied in this traditional industry by pilot researchers. This paper provides an integrated model of radio-frequency identification (RFID) and four-dimensional Computer-Aided Design (4D CAD) in construction management. RFID involves the use of tags that collect data and transmit data. RFID can collect data by radio waves instead of light waves. RFID technology is surpassing barcode technology where light waves are easily blocked and barcode labels are easy to fall off or become unreadable due to dust, dirt, or other contaminants. 4D CAD which involves 3D construction models and construction schedules presents visualized construction process. Integration of RFID and 4D CAD in this paper built a dynamic construction management and control system which would reduce the time of capturing data on site and control quality of construction materials efficiently. Pilot test result shows that a construction manager can easily understand how and what a complicated construction project will be accomplished. Although further analysis is necessary, RFID and 4D CAD show promises of being a beneficial technology in construction management.
基金supported by the NSFC for Distinguished Young Scholars(no.52025022)the NSFC Program(nos.U23A20568,52372137,52272140,52402175,and 52072065)+3 种基金the China Postdoctoral Science Foundation(GZB20240135)the“111”Project(no.B13013)the fund from Jilin Province(no.20230402072GH)the Fundamental Research Funds for the Central Universities(no.2412023YQ004).
文摘The optoelectronic memristor integrates the multifunctionalities of image sensing,storage,and processing,which has been considered as the leading candidate to construct novel neuromorphic visual system.In particular,memristive materials with all-optical modulation and complementary metal oxide semiconductor(CMOS)compatibility are highly desired for energy-efficient image perception.As a p-type oxide material,Cu_(2)O exhibits outstanding theoretical photoelectric conversion efficiency and broadband photoresponse.In this work,an all-optically controlled memristor based on the Cu_(2)O/TiO_(2)/sodium alginate nanocomposite film is developed.Optical potentiation and depression behaviors have been implemented by utilizing visible(680 nm)and ultraviolet(350 nm)light.Furthermore,a 7×9 optoelectronic memristive array with satisfactory device variation and environment stability is constructed to emulate the image preprocessing function in biological retina.The random noise can be reduced effectively by utilizing bidirectional optical input.Beneficial from the image preprocessing function,the accuracy of handwritten digit classification increases more than 60%.Our work presents a pathway toward high-efficient neuromorphic visual system and promotes the development of artificial intelligence technology.
