Living Heritage Protection in China Urban Renewal Planning: A Case Study of Quanzhou West Street

Living Heritage which is delivering the city’s character gene, also plays an important role in maintaining the vitality of the city. However, in the old towns of china, Living Heritage is always associated with aging population, bad infrastructure, complicity of property ownership and poor residents. The urban renewal planning in most cases of China was material-based planning, which focus on increasing the quality of infrastructure and local wealth. Living Heritage hasn’t received enough attention in the process and it was gradually dying. As a result, renewed cities always have an obvious reduction of vitality, personality and humane. The complicated situation in Quanzhou West Street is a microcosm of the old towns in China. A sociological research has already been conducted to evaluate the situation of Living Heritage there both qualitatively and quantitatively. With reference to several related cases, we offered a set of innovative strategy combinations to keep Living Heritage living in urban renewal

VCD: Visual Causality Discovery for Cross-Modal Question Reasoning

Existing visual question reasoning methods usually fail to explicitly discover the inherent causal mechanism and ignore jointly modeling cross-modal event temporality and causality. In this paper, we propose a visual question reasoning framework named Cross-Modal Question Reasoning (CMQR), to discover temporal causal structure and mitigate visual spurious correlation by causal intervention. To explicitly discover visual causal structure, the Visual Causality Discovery (VCD) architecture is proposed to find question-critical scene temporally and disentangle the visual spurious correlations by attention-based front-door causal intervention module named Local-Global Causal Attention Module (LGCAM). To align the fine-grained interactions between linguistic semantics and spatial-temporal representations, we build an Interactive Visual-Linguistic Transformer (IVLT) that builds the multi-modal co-occurrence interactions between visual and linguistic content. Extensive experiments on four datasets demonstrate the superiority of CMQR for discovering visual causal structures and achieving robust question reasoning.Comment: 12 pages, 6 figures. arXiv admin note: substantial text overlap with arXiv:2207.1264

New multi-soliton solutions for generalized Burgers-Huxley equation

The double exp-function method is used to obtain a two-soliton solution of the generalized Burgers-Huxley equation. The wave has two different velocities and two different frequencies

Observation of Ultrahigh Mobility Surface States in a Topological Crystalline Insulator by Infrared Spectroscopy

Topological crystalline insulators (TCIs) possess metallic surface states protected by crystalline symmetry, which are a versatile platform for exploring topological phenomena and potential applications. However, progress in this field has been hindered by the challenge to probe optical and transport properties of the surface states owing to the presence of bulk carriers. Here we report infrared (IR) reflectance measurements of a TCI, (001) oriented $Pb_{1-x}Sn_{x}Se$ in zero and high magnetic fields. We demonstrate that the far-IR conductivity is unexpectedly dominated by the surface states as a result of their unique band structure and the consequent small IR penetration depth. Moreover, our experiments yield a surface mobility of 40000 $cm^{2}/(Vs)$, which is one of the highest reported values in topological materials, suggesting the viability of surface-dominated conduction in thin TCI crystals. These findings pave the way for exploring many exotic transport and optical phenomena and applications predicted for TCIs