Optical molecular tomography(OMT)is a potential pre-clinical molecular imaging technique with applications in a variety of biomedical areas,which can provide non-invasive quantitative three-dimensional(3D)information ...Optical molecular tomography(OMT)is a potential pre-clinical molecular imaging technique with applications in a variety of biomedical areas,which can provide non-invasive quantitative three-dimensional(3D)information regarding tumor distribution in living animals.The construction of optical transmission models and the application of reconstruction algorithms in traditional model-based reconstruction processes have affected the reconstruction results,resulting in problems such as low accuracy,poor robustness,and long-time consumption.Here,a gates joint locally connected network(GLCN)method is proposed by establishing the mapping relationship between the inside source distribution and the photon density on surface directly,thus avoiding the extra time consumption caused by iteration and the reconstruction errors caused by model inaccuracy.Moreover,gates module was composed of the concatenation and multiplication operators of three different gates.It was embedded into the network aiming at remembering input surface photon density over a period and allowing the network to capture neurons connected to the true source selectively by controlling three different gates.To evaluate the performance of the proposed method,numerical simulations were conducted,whose results demonstrated good performance in terms of reconstruction positioning accuracy and robustness.展开更多
Based on the features of rock slope bioengineering protection,the ecology protection mechanism of the urban rock slope was discussed with the mechanics effect of plants and rock slope,and the reinforcement action mech...Based on the features of rock slope bioengineering protection,the ecology protection mechanism of the urban rock slope was discussed with the mechanics effect of plants and rock slope,and the reinforcement action mechanism of rock slope by plant root system was analyzed as well.Then,the corresponding mechanical model was proposed,from which the formula to calculate the increased shearing strength of the root system-earth compound body was derived.Moreover,the side slope rainfall interception,the runoff lagging,the soil antiseepage,and the soil layer consolidating effect were studied,respectively.Furthermore,the indoor model experiment of urban crag rock slope ecology protection was designed and completed,in which various grasses to plant in slope with different angles,solid earth forms,and the different strengthening earth mechanism were studied.Finally,the present method was applied in an engineering project,from which the antiwashing behavior of three kind of grasses(i.e.,the Bahiagrass,the tall fescue,and the Bermudagrass)planted in the slope with an angle of 38°,48°,and 58°,respectively,and different strengthening structures(i.e.,the diamond wire netting,the geocell and the threedimensional network)were obtained.The application results also show that the effect of geocell structure is the best one followed by the three-dimensional net and the diamond wire net.The antiwashing capability per unit area has a critical slope angle of about 25°.The reinforcing effect of Bermudagrass is better than the Bahiagrass and tall fescue.展开更多
基金supported by the National Natural Science Foundation of China(No.62101439)the Key Research and Development Program of Shaanxi(No.2023-YBSF-289).
文摘Optical molecular tomography(OMT)is a potential pre-clinical molecular imaging technique with applications in a variety of biomedical areas,which can provide non-invasive quantitative three-dimensional(3D)information regarding tumor distribution in living animals.The construction of optical transmission models and the application of reconstruction algorithms in traditional model-based reconstruction processes have affected the reconstruction results,resulting in problems such as low accuracy,poor robustness,and long-time consumption.Here,a gates joint locally connected network(GLCN)method is proposed by establishing the mapping relationship between the inside source distribution and the photon density on surface directly,thus avoiding the extra time consumption caused by iteration and the reconstruction errors caused by model inaccuracy.Moreover,gates module was composed of the concatenation and multiplication operators of three different gates.It was embedded into the network aiming at remembering input surface photon density over a period and allowing the network to capture neurons connected to the true source selectively by controlling three different gates.To evaluate the performance of the proposed method,numerical simulations were conducted,whose results demonstrated good performance in terms of reconstruction positioning accuracy and robustness.
文摘Based on the features of rock slope bioengineering protection,the ecology protection mechanism of the urban rock slope was discussed with the mechanics effect of plants and rock slope,and the reinforcement action mechanism of rock slope by plant root system was analyzed as well.Then,the corresponding mechanical model was proposed,from which the formula to calculate the increased shearing strength of the root system-earth compound body was derived.Moreover,the side slope rainfall interception,the runoff lagging,the soil antiseepage,and the soil layer consolidating effect were studied,respectively.Furthermore,the indoor model experiment of urban crag rock slope ecology protection was designed and completed,in which various grasses to plant in slope with different angles,solid earth forms,and the different strengthening earth mechanism were studied.Finally,the present method was applied in an engineering project,from which the antiwashing behavior of three kind of grasses(i.e.,the Bahiagrass,the tall fescue,and the Bermudagrass)planted in the slope with an angle of 38°,48°,and 58°,respectively,and different strengthening structures(i.e.,the diamond wire netting,the geocell and the threedimensional network)were obtained.The application results also show that the effect of geocell structure is the best one followed by the three-dimensional net and the diamond wire net.The antiwashing capability per unit area has a critical slope angle of about 25°.The reinforcing effect of Bermudagrass is better than the Bahiagrass and tall fescue.
