The regularization contributes to the resolution and stability in geophysical inversion. The authors apply dual-parameter shaping regularization to full waveform inversion, aiming at two points ： （ 1 ） improving th...The regularization contributes to the resolution and stability in geophysical inversion. The authors apply dual-parameter shaping regularization to full waveform inversion, aiming at two points ： （ 1 ） improving the boundary resolution, and （2） increasing convergence. Firstly, the forward modeling is done, and the inversion is processed with the optimal solution. Compared with classical Tikhonov regularization scheme, the method re fleets better resolution and stronger convergence. Then, Marmousi model is experimented and inversed, and the deep structure has a sharper outline. The phase residual comparison illustrates weaker cycle-slipping. And a choice scheme of parameter is applied in FWI.展开更多
The fluorescence emission wavelength [lambda(max(em))] values of three types of benzaldehyde derivatives, namely, ethylene acetals (1-Ys), 4-nitrophenylhydrazones (2-Ys) and phenylhydrazones (3-Ys), have been measured...The fluorescence emission wavelength [lambda(max(em))] values of three types of benzaldehyde derivatives, namely, ethylene acetals (1-Ys), 4-nitrophenylhydrazones (2-Ys) and phenylhydrazones (3-Ys), have been measured. Correlation analyses by the dual-parameter equation show that the lambda(max(em)) values of 1-Ys are mainly affected by the spin-delocalization effects of the substituents, while those of 2-Ys are mainly affected by the polar effects. However, those of 3-Ys are independent of the substituents.展开更多
A novel fiber optic sensor based on hydrogel-immobilized enzyme complex was developed for the simultaneous measurement of dual-parameter,the leap from a single parameter detecting fiber optic sensor to a fiber optic s...A novel fiber optic sensor based on hydrogel-immobilized enzyme complex was developed for the simultaneous measurement of dual-parameter,the leap from a single parameter detecting fiber optic sensor to a fiber optic sensor that can continuously detect two kinds of parameters was achieved.By controlling the temperature from high to low,the function of fiber sulfide sensor and fiber DCP sensor can be realized,so as to realize the continuous detection of dual-parameter.The different variables affecting the sensor performance were evaluated and optimized.Under the optimal conditions,the response curves,linear detection ranges,detection limits and response times of the dual-parameter sensor for testing sulfide and DCP were obtained,respectively.The sensor displays high selectivity,good repeatability and stability,which have good potentials in analyzing sulfide and DCP concentration of practical water samples.展开更多
By using 1-methyl-2-formyl-5 -Y-substituted pyrrole (4-nitrophenyl)hydrazones as a model for nitrogen-containing heterocyclic aromatic compounds, the emission wavelength [lambda(max(em))] values df their fluorescence ...By using 1-methyl-2-formyl-5 -Y-substituted pyrrole (4-nitrophenyl)hydrazones as a model for nitrogen-containing heterocyclic aromatic compounds, the emission wavelength [lambda(max(em))] values df their fluorescence spectra have been measured. Correlation results show that the Delta E-em values are mainly affected by polar effects, but spin-delocalizatin effects also exist.展开更多
For oil and gas pipeline monitoring applications, this paper proposed a dual-parameter fusion distributed fiber optic sensor system that enables distributed temperature and distributed vibration measurements in a sing...For oil and gas pipeline monitoring applications, this paper proposed a dual-parameter fusion distributed fiber optic sensor system that enables distributed temperature and distributed vibration measurements in a single fiber. Through the fiber-scattering spectrum time domain detection combined with coded pulse sequence and Raman scattering spectrum is obtained, which realizes high-resolution temperature measurement and wide-band vibrational wave measurement. The experimental results show that, on 10 km optical fiber measurement, temperature resolution up to 0.1?C and vibration response frequency range 20 Hz - 5 kHz. This sensing system achieves temperature and vibration dual-parameter measurements with fiber optics, greatly simplifying the system and facilitating installation and it can be widely used in oil and gas pipeline monitoring.展开更多
The fluorescence quenching coefficient (Ksv) and the quenching rate constant kq of ten para-substituted styrenes (1-Ys) have been measured and correlation-analyzed by both the dual-parameter equation (Eq. 1) with (ρx...The fluorescence quenching coefficient (Ksv) and the quenching rate constant kq of ten para-substituted styrenes (1-Ys) have been measured and correlation-analyzed by both the dual-parameter equation (Eq. 1) with (ρxσx+ρ'σ') and the single-parameter equation (Eq. 2) with ρxσx. Ex-cellent results have been obtained for the correlation of KSV against (ρxσmb+ρ'σ'JJ) or (ρxσ+ +ρ'σ'JJ). Our results suggest that, possibly, there might be no need to use excited-state substituent constant for the fluorecence quenching process of excited states of styrenes.展开更多
To quantify the seismic resilience of buildings,a method for evaluating functional loss from the component level to the overall building is proposed,and the dual-parameter seismic resilience assessment method based on...To quantify the seismic resilience of buildings,a method for evaluating functional loss from the component level to the overall building is proposed,and the dual-parameter seismic resilience assessment method based on postearthquake loss and recovery time is improved.A threelevel function tree model is established,which can consider the dynamic changes in weight coefficients of different category of components relative to their functional losses.Bayesian networks are utilized to quantify the impact of weather conditions,construction technology levels,and worker skill levels on component repair time.A method for determining the real-time functional recovery curve of buildings based on the component repair process is proposed.Taking a three-story teaching building as an example,the seismic resilience indices under basic earthquakes and rare earthquakes are calculated.The results show that the seismic resilience grade of the teaching building is comprehensively judged as GradeⅢ,and its resilience grade is more significantly affected by postearthquake loss.The proposed method can be used to predict the seismic resilience of buildings prior to earthquakes,identify weak components within buildings,and provide guidance for taking measures to enhance the seismic resilience of buildings.展开更多
A novel Mach–Zehnder interferometer(MZI)sensor based on multiple supermode interferences that can be used for dualparameter measurements of temperature and strain is proposed and demonstrated.The MZI is made by splic...A novel Mach–Zehnder interferometer(MZI)sensor based on multiple supermode interferences that can be used for dualparameter measurements of temperature and strain is proposed and demonstrated.The MZI is made by splicing a coupled four-core sapphire-derived fiber(FSDF)between two single-mode fibers,utilizing the differences in temperature response and strain response of different supermodes in the FSDF to realize the simultaneous measurement of the two parameters.Experimental results demonstrate that the proposed MZI can achieve up to 1600μεand 1000℃ measurements with a temperature-strain cross-sensitivity of approximately 0.075℃/με.展开更多
This study proposes a dual-parameter sensor to simultaneously measure curvature and temperature using a 3D-printed seven-core optical fiber inscribed with a fiber Bragg grating(FBG).The seven-core fiber used was prepa...This study proposes a dual-parameter sensor to simultaneously measure curvature and temperature using a 3D-printed seven-core optical fiber inscribed with a fiber Bragg grating(FBG).The seven-core fiber used was prepared by 3D-printing fiber technology of great flexibility in both structure and material.Attributed to the asymmetrical structure of this 3 Dprinted fiber,the sensor is capable of distinguishing the bending directions.Furthermore,the sensing characteristics and the directional recognition mechanism of the sensor are analyzed through both theoretical simulations and experimental investigations.The proposed sensor incorporates two sensing elements,specifically the Mach-Zehnder interferometer(MZI)and FBG.The combination of the MZI and FBG in the sensor enables simultaneous measurement of curvature and temperature.This vector sensor has a sensitivity of 25.782 nm/m-1in the curvature range of 0-1.518 m^(-1),when the bending is applied along the defined direction of 30°.Within the temperature range of 20.0-110.0℃,the temperature sensitivity is 34 pm/℃.Experimental results validate the excellent performance of the proposed sensor,providing an efficient and scalable solution for dual-parameter sensing in future industrial and environmental applications.展开更多
Stretchable thermoelectric-based self-powered sensors have attracted widespread attention for wearable electronic devices.However,the development of thermoelectric materials with wearable comfort,green,and multimodal ...Stretchable thermoelectric-based self-powered sensors have attracted widespread attention for wearable electronic devices.However,the development of thermoelectric materials with wearable comfort,green,and multimodal synergy remains chal-lenging.In this paper,we prepared a poly(3,4-ethylenedioxythiophene)/multi-walled carbon nanotube(PEDOT/MWCNT)-based thermoelectric fabric for self-powered strain-temperature dual-parameter sensing via spraying and in situ bio-polymer-ization.Compared with ferric chloride(FeCl_(3)),used in chemical polymerization,the PEDOT thermoelectric fabric prepared by enzymatic polymerization is not doped with metal ions,making the thermoelectric performance of flexible wearable fabrics more stable.In addition,the energy-filtration effect of PEDOT and MWCNT efficiently enhanced the thermoelectric performance of the fabric.The fabric has over 320%elongation potential and excellent breathability while exhibiting excel-lent wearability.Moreover,the fabric-based sensor had a wide strain range(1-100%)and temperature detection limit(1℃).In addition,fabric-based sensors were tested by sewing them directly onto clothing or attachment accessories,and showed a rapid response to changes in human joint bending and microenvironmental temperature differences.Moreover,the sensor could be integrated into an intelligent firefighting suit,to continuously and synergistically monitor health abnormalities in firefighter's body movement and temperature thresholds in the micro-environmental temperature of the suit.The developed self-powered dual-parameter wearable sensor shows fascinating potential for applications in human health monitoring,human-computer interaction devices,and intelligent robotics.展开更多
Nitrogen hyperfine splitting constants (aN values) of seven symmetrically para-disubstituted diphenyl nitroxides (1-Y's) were measured by EPR and used in conjunction with five literature values in our correlation ...Nitrogen hyperfine splitting constants (aN values) of seven symmetrically para-disubstituted diphenyl nitroxides (1-Y's) were measured by EPR and used in conjunction with five literature values in our correlation analysis. The correlation of these ON values by single-parameter Eq. 1 and dual-parameter Eq. 2 shows that the application of Eq. 2 does not significantly improve the correlation. But our data can also be interpreted by the proposition that the spin-delocalization effect is not completely nonexistent and that it might have revealed itself through the aN values of two very weakly polar substituents with pronounced spin-stabilizing abilities, i.e., SMe and SiMe3.展开更多
In this paper,it is shown that the differential reflectivity Z_(DR) is related to drop size distribution(DSD)and the spectral shape variation of different truncated diameters.Z_(DR) is a sensitive function to variatio...In this paper,it is shown that the differential reflectivity Z_(DR) is related to drop size distribution(DSD)and the spectral shape variation of different truncated diameters.Z_(DR) is a sensitive function to variation of DSD of the spectra.The effects of shape variation of DSD on rainfall can be deduced with a(Z_H,Z_(DR))dual-parameter technique,which is effective to improve the accuracy of rainfall measurement and is of the priority of identifying large particles of hydrometeors(especially hailstone)from the rain region.展开更多
文摘The regularization contributes to the resolution and stability in geophysical inversion. The authors apply dual-parameter shaping regularization to full waveform inversion, aiming at two points ： （ 1 ） improving the boundary resolution, and （2） increasing convergence. Firstly, the forward modeling is done, and the inversion is processed with the optimal solution. Compared with classical Tikhonov regularization scheme, the method re fleets better resolution and stronger convergence. Then, Marmousi model is experimented and inversed, and the deep structure has a sharper outline. The phase residual comparison illustrates weaker cycle-slipping. And a choice scheme of parameter is applied in FWI.
文摘The fluorescence emission wavelength [lambda(max(em))] values of three types of benzaldehyde derivatives, namely, ethylene acetals (1-Ys), 4-nitrophenylhydrazones (2-Ys) and phenylhydrazones (3-Ys), have been measured. Correlation analyses by the dual-parameter equation show that the lambda(max(em)) values of 1-Ys are mainly affected by the spin-delocalization effects of the substituents, while those of 2-Ys are mainly affected by the polar effects. However, those of 3-Ys are independent of the substituents.
基金Funded by the Natural Science Foundation of Hubei Province(No.2022CFB861)the Wenhua College Research and Innovation Team(No.2022T01)。
文摘A novel fiber optic sensor based on hydrogel-immobilized enzyme complex was developed for the simultaneous measurement of dual-parameter,the leap from a single parameter detecting fiber optic sensor to a fiber optic sensor that can continuously detect two kinds of parameters was achieved.By controlling the temperature from high to low,the function of fiber sulfide sensor and fiber DCP sensor can be realized,so as to realize the continuous detection of dual-parameter.The different variables affecting the sensor performance were evaluated and optimized.Under the optimal conditions,the response curves,linear detection ranges,detection limits and response times of the dual-parameter sensor for testing sulfide and DCP were obtained,respectively.The sensor displays high selectivity,good repeatability and stability,which have good potentials in analyzing sulfide and DCP concentration of practical water samples.
文摘By using 1-methyl-2-formyl-5 -Y-substituted pyrrole (4-nitrophenyl)hydrazones as a model for nitrogen-containing heterocyclic aromatic compounds, the emission wavelength [lambda(max(em))] values df their fluorescence spectra have been measured. Correlation results show that the Delta E-em values are mainly affected by polar effects, but spin-delocalizatin effects also exist.
文摘For oil and gas pipeline monitoring applications, this paper proposed a dual-parameter fusion distributed fiber optic sensor system that enables distributed temperature and distributed vibration measurements in a single fiber. Through the fiber-scattering spectrum time domain detection combined with coded pulse sequence and Raman scattering spectrum is obtained, which realizes high-resolution temperature measurement and wide-band vibrational wave measurement. The experimental results show that, on 10 km optical fiber measurement, temperature resolution up to 0.1?C and vibration response frequency range 20 Hz - 5 kHz. This sensing system achieves temperature and vibration dual-parameter measurements with fiber optics, greatly simplifying the system and facilitating installation and it can be widely used in oil and gas pipeline monitoring.
基金Project supported by the National Natural Science Foundation of China
文摘The fluorescence quenching coefficient (Ksv) and the quenching rate constant kq of ten para-substituted styrenes (1-Ys) have been measured and correlation-analyzed by both the dual-parameter equation (Eq. 1) with (ρxσx+ρ'σ') and the single-parameter equation (Eq. 2) with ρxσx. Ex-cellent results have been obtained for the correlation of KSV against (ρxσmb+ρ'σ'JJ) or (ρxσ+ +ρ'σ'JJ). Our results suggest that, possibly, there might be no need to use excited-state substituent constant for the fluorecence quenching process of excited states of styrenes.
基金The National Key Research and Development Program of China(No.2023YFC3805003)。
文摘To quantify the seismic resilience of buildings,a method for evaluating functional loss from the component level to the overall building is proposed,and the dual-parameter seismic resilience assessment method based on postearthquake loss and recovery time is improved.A threelevel function tree model is established,which can consider the dynamic changes in weight coefficients of different category of components relative to their functional losses.Bayesian networks are utilized to quantify the impact of weather conditions,construction technology levels,and worker skill levels on component repair time.A method for determining the real-time functional recovery curve of buildings based on the component repair process is proposed.Taking a three-story teaching building as an example,the seismic resilience indices under basic earthquakes and rare earthquakes are calculated.The results show that the seismic resilience grade of the teaching building is comprehensively judged as GradeⅢ,and its resilience grade is more significantly affected by postearthquake loss.The proposed method can be used to predict the seismic resilience of buildings prior to earthquakes,identify weak components within buildings,and provide guidance for taking measures to enhance the seismic resilience of buildings.
基金supported by the National Key Research and Development Program of China(No.2023YFB3209500)the National Natural Science Foundation of China(No.U2241237)+1 种基金the China Postdoctoral Science Foundation(No.2024M751934)the Postdoctoral Fellowship Program of CPSF(No.GZC20240973)。
文摘A novel Mach–Zehnder interferometer(MZI)sensor based on multiple supermode interferences that can be used for dualparameter measurements of temperature and strain is proposed and demonstrated.The MZI is made by splicing a coupled four-core sapphire-derived fiber(FSDF)between two single-mode fibers,utilizing the differences in temperature response and strain response of different supermodes in the FSDF to realize the simultaneous measurement of the two parameters.Experimental results demonstrate that the proposed MZI can achieve up to 1600μεand 1000℃ measurements with a temperature-strain cross-sensitivity of approximately 0.075℃/με.
基金supported by the National Natural Science Foundation of China(No.62475142)the Jiangsu Province’s Industry Outlook and Key Core Technologies-Key Projects(No.BE2022055-4)+5 种基金the Henan Key Laboratory of Laser and Opto-electric Information Technology(No.JG2023-RF01)the Science and Technology Commission of Shanghai Municipality,China(No.SKLSFO2024-01)the Exchange Project for Key Lab of Optical Fiber Sensing and Communications(Ministry of Education of China)Henan Key Laboratory of Laser and Opto-electric Information Technology(No.JG2023-RF01)the Laboratory of Science and Technology on Marine Navigation and Control,China State Shipbuilding Corporation(No.2023010102)the 111 Project(No.D20031)。
文摘This study proposes a dual-parameter sensor to simultaneously measure curvature and temperature using a 3D-printed seven-core optical fiber inscribed with a fiber Bragg grating(FBG).The seven-core fiber used was prepared by 3D-printing fiber technology of great flexibility in both structure and material.Attributed to the asymmetrical structure of this 3 Dprinted fiber,the sensor is capable of distinguishing the bending directions.Furthermore,the sensing characteristics and the directional recognition mechanism of the sensor are analyzed through both theoretical simulations and experimental investigations.The proposed sensor incorporates two sensing elements,specifically the Mach-Zehnder interferometer(MZI)and FBG.The combination of the MZI and FBG in the sensor enables simultaneous measurement of curvature and temperature.This vector sensor has a sensitivity of 25.782 nm/m-1in the curvature range of 0-1.518 m^(-1),when the bending is applied along the defined direction of 30°.Within the temperature range of 20.0-110.0℃,the temperature sensitivity is 34 pm/℃.Experimental results validate the excellent performance of the proposed sensor,providing an efficient and scalable solution for dual-parameter sensing in future industrial and environmental applications.
基金supported by the National Key R&D Program of China(2021YFC2104000)Postgraduate Research&Practice Innovation Program of Jiangsu Province(KYCX22_2349)+1 种基金National Natural Science Foundation of China(22109054)China Postdoctoral Science Foundation(2021M691264).
文摘Stretchable thermoelectric-based self-powered sensors have attracted widespread attention for wearable electronic devices.However,the development of thermoelectric materials with wearable comfort,green,and multimodal synergy remains chal-lenging.In this paper,we prepared a poly(3,4-ethylenedioxythiophene)/multi-walled carbon nanotube(PEDOT/MWCNT)-based thermoelectric fabric for self-powered strain-temperature dual-parameter sensing via spraying and in situ bio-polymer-ization.Compared with ferric chloride(FeCl_(3)),used in chemical polymerization,the PEDOT thermoelectric fabric prepared by enzymatic polymerization is not doped with metal ions,making the thermoelectric performance of flexible wearable fabrics more stable.In addition,the energy-filtration effect of PEDOT and MWCNT efficiently enhanced the thermoelectric performance of the fabric.The fabric has over 320%elongation potential and excellent breathability while exhibiting excel-lent wearability.Moreover,the fabric-based sensor had a wide strain range(1-100%)and temperature detection limit(1℃).In addition,fabric-based sensors were tested by sewing them directly onto clothing or attachment accessories,and showed a rapid response to changes in human joint bending and microenvironmental temperature differences.Moreover,the sensor could be integrated into an intelligent firefighting suit,to continuously and synergistically monitor health abnormalities in firefighter's body movement and temperature thresholds in the micro-environmental temperature of the suit.The developed self-powered dual-parameter wearable sensor shows fascinating potential for applications in human health monitoring,human-computer interaction devices,and intelligent robotics.
基金Project supported by the National Natural Science Foundation of China.
文摘Nitrogen hyperfine splitting constants (aN values) of seven symmetrically para-disubstituted diphenyl nitroxides (1-Y's) were measured by EPR and used in conjunction with five literature values in our correlation analysis. The correlation of these ON values by single-parameter Eq. 1 and dual-parameter Eq. 2 shows that the application of Eq. 2 does not significantly improve the correlation. But our data can also be interpreted by the proposition that the spin-delocalization effect is not completely nonexistent and that it might have revealed itself through the aN values of two very weakly polar substituents with pronounced spin-stabilizing abilities, i.e., SMe and SiMe3.
基金National Disaster Reduction Foundation(96-020-01-07)of China,KZ 951-B1-405 Western Brilliance of the Chinese Academy of Sciences.
文摘In this paper,it is shown that the differential reflectivity Z_(DR) is related to drop size distribution(DSD)and the spectral shape variation of different truncated diameters.Z_(DR) is a sensitive function to variation of DSD of the spectra.The effects of shape variation of DSD on rainfall can be deduced with a(Z_H,Z_(DR))dual-parameter technique,which is effective to improve the accuracy of rainfall measurement and is of the priority of identifying large particles of hydrometeors(especially hailstone)from the rain region.
