This paper first deeply interprets the connotation of the“One Core,Two Lines,Four Dimensions”ideological and political teaching model in courses.Then,it explores the significant meaning of integrating this teaching ...This paper first deeply interprets the connotation of the“One Core,Two Lines,Four Dimensions”ideological and political teaching model in courses.Then,it explores the significant meaning of integrating this teaching model into the Interpretation of Concrete Plane Construction Drawings course.Finally,based on the challenges faced in this work,corresponding educational countermeasures are proposed to help improve the effectiveness and quality of ideological and political construction in the Interpretation of Concrete Plane Construction Drawings course and enhance the level of talent cultivation.展开更多
Conventional shot-gather migration uses a cross-correlation imaging condition proposed by Clarebout （1971）, which cannot preserve imaging amplitudes. The deconvolution imaging condition can improve the imaging ampli...Conventional shot-gather migration uses a cross-correlation imaging condition proposed by Clarebout （1971）, which cannot preserve imaging amplitudes. The deconvolution imaging condition can improve the imaging amplitude and compensate for illumination. However, the deconvolution imaging condition introduces instability issues. The least-squares imaging condition first computes the sum of the cross-correlation of the forward and backward wavefields over all frequencies and sources, and then divides the result by the total energy of the forward wavefield. Therefore, the least-squares imaging condition is more stable than the classic imaging condition. However, the least-squares imaging condition cannot provide accurate results in areas where the illumination is very poor and unbalanced. To stabilize the least-squares imaging condition and balance the imaging amplitude, we propose a novel imaging condition with structure constraints that is based on the least-squares imaging condition. Our novel imaging condition uses a plane wave construction that constrains the imaging result to be smooth along geological structure boundaries in the inversion frame. The proposed imaging condition improves the stability of the imaging condition and balances the imaging amplitude. The proposed condition is applied to two examples, the horizontal layered model and the Sigsbee 2A model. These tests show that, in comparison to the damped least-squares imaging condition, the stabilized least-squares imaging condition with structure constraints improves illumination stability and balance, makes events more consecutive, adjusts the amplitude of the depth layers where the illumination is poor and unbalanced, suppresses imaging artifacts, and is conducive to amplitude preserving imaging of deep layers.展开更多
One of the-world's most pertectly presefved settlements offers valuable insight into ancient urban planing construction techniquos and the vibrant religious and cultural exchanges along the Silk Road.
基金Exploration and Practice of the Ideological and Political Teaching Mode Based on the“One Core,Two Lines,Four Dimensions”Curriculum:Taking the“Concrete Flat Construction Drawing Interpretation”Course as an Example(Z233315S)。
文摘This paper first deeply interprets the connotation of the“One Core,Two Lines,Four Dimensions”ideological and political teaching model in courses.Then,it explores the significant meaning of integrating this teaching model into the Interpretation of Concrete Plane Construction Drawings course.Finally,based on the challenges faced in this work,corresponding educational countermeasures are proposed to help improve the effectiveness and quality of ideological and political construction in the Interpretation of Concrete Plane Construction Drawings course and enhance the level of talent cultivation.
基金financially supported by Important National Science and Technology Specific Projects of China(Grant No. 2011ZX05023-005-005)
文摘Conventional shot-gather migration uses a cross-correlation imaging condition proposed by Clarebout （1971）, which cannot preserve imaging amplitudes. The deconvolution imaging condition can improve the imaging amplitude and compensate for illumination. However, the deconvolution imaging condition introduces instability issues. The least-squares imaging condition first computes the sum of the cross-correlation of the forward and backward wavefields over all frequencies and sources, and then divides the result by the total energy of the forward wavefield. Therefore, the least-squares imaging condition is more stable than the classic imaging condition. However, the least-squares imaging condition cannot provide accurate results in areas where the illumination is very poor and unbalanced. To stabilize the least-squares imaging condition and balance the imaging amplitude, we propose a novel imaging condition with structure constraints that is based on the least-squares imaging condition. Our novel imaging condition uses a plane wave construction that constrains the imaging result to be smooth along geological structure boundaries in the inversion frame. The proposed imaging condition improves the stability of the imaging condition and balances the imaging amplitude. The proposed condition is applied to two examples, the horizontal layered model and the Sigsbee 2A model. These tests show that, in comparison to the damped least-squares imaging condition, the stabilized least-squares imaging condition with structure constraints improves illumination stability and balance, makes events more consecutive, adjusts the amplitude of the depth layers where the illumination is poor and unbalanced, suppresses imaging artifacts, and is conducive to amplitude preserving imaging of deep layers.
文摘One of the-world's most pertectly presefved settlements offers valuable insight into ancient urban planing construction techniquos and the vibrant religious and cultural exchanges along the Silk Road.
