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Aiming at the problem of insufficient impact resistance of the existing portal support, a kind of anti-impact support structure for multi-direction energy absorption was constructed by adding V-shaped groove to the beam structure and flexible chain support structures on both sides. Parameters such as total energy absorption, plastic strain and vertical displacement were used as analysis indexes to study the supporting performance of the support in the face of vertical impact and lateral impact, and the deformation degree for each structure of the support and the overall most vulnerable position were obtained. Under the vertical impact condition, the equivalent plastic strain position of the new support appeared at the middle joint of the top beam, and then the joint of the top beam should be thickened. In the whole process of vertical impact, the vertical displacement of the three hydraulic columns was not average, which indicated that the support was not very ideal in the face of concentrated impact. Under vertical impact conditions, the V-shaped groove had a small deformation in the face of the impact with large velocity, and a large deformation in the face of the impact with small velocity, which showed that the V-shaped groove had a certain response speed in the face of impact. Under lateral impact conditions, the equivalent plastic strain of the support was mainly concentrated at the connection between the flexible chain and the support when the impact velocity is low, and the annular base should be installed at the connection between the flexible chain and the support. The bearing capacity and total energy absorption of flexible chain support structure under lateral impact were slightly weaker than that of support under vertical impact, but they can play a good role in horizontal support.

The application of computer technology provides new ideas for the design of sculpture works. In this paper, with the support of virtual reality technology, the pixel set of each color block is extracted from the actual image to determine the location of the center point of the color block. Based on the extracted information, a visual color marking method is used to realize the 3D registration of the sculpture scene. In the virtual scene, through the virtual modeling of the sculpture work, a spline surface model was generated by applying sparse image sequences and optimally adjusted to transform the surface piece control point problem into a quadratic function of the network vertices. The mathematical logic properties of the virtual reality sculpture work wind direction improved by 22.5 points, the mathematical logic properties of the light design improved by 25.8 points, and the mathematical logic properties of the shadow design improved by 23.1 points. The virtual reality technology provides an interactive experience for the design of sculpture works.

In this paper, firstly, in the context of intelligence, using techniques such as hierarchical features, local perceptual field, weight sharing, and spatial subsampling make the convolutional neural network with representational learning ability, certain translation, scaling, and deformation invariance, which can accurately extract the features of target objects in graphic design elements. Next, the network structure, loss function, and optimization methods of MaskR-CNN are analyzed, and the MaskR-CNN convolutional neural network is implemented based on the TensorFlow framework, and the network is applied to the extraction of buildings from graphic design elements. Then the borrowed landscape technique in graphic design is used to enrich the combination form of elements of architectural design through the mirror effect of water landscape. The selected IALD dataset is composed of 180 data images and 180 corresponding labeled images, and the effect of high-resolution building extraction of graphic design elements based on the MaskR-CNN model is verified by simulation experiments. The simulation results show that Mask R-CNN improves the accuracy of building extraction from graphic design elements by 5.11%, mAP also improves by about 10.09%, and the inference time is less than 1 second; Mask R-CNN has good robustness and accuracy for building extraction from graphic design elements. This study has important research significance for the depth and development of the commercial architectural design.

The roadway anti-impact energy absorption support can effectively prevent the occurrence of rock burst, reduce the casualties and property losses caused by sudden disasters, and has achieved good application effect. The most important part is the energy absorption and anti-impact energy absorbing component. According to the principle of maximizing the plastic deformation area, a new type of energy absorption and anti-impact device with arc thin wall was presented to improve the shortcomings of the traditional device. In order to optimize the structure of the thin-wall energy absorption and anti-impact device, the properties of it was analyzed by using the method of finite element numerical simulation. At the same time, the energy absorption characteristics of the new type of composite corrugated column component for mining under different sidewall slopes and wall thicknesses are studied, so that the structure of the new type of composite corrugated column component for mining can reach the optimum. The results showed that: ①Under the same wall thickness, the peak bearing capacity Fmax, the average crushing bearing capacity Fmean, the total energy absorption E, and specific energy absorption ESA of the new device are higher than those of the traditional device, among which the average crushing bearing capacity Fmean has increased by 34.2%, total energy absorption has increased by nearly 33.6%, and specific energy absorption has increased by 127.4%. The new type of energy absorption device has obvious anti-impact performance advantages. ②With the decrease of the side wall slope, the peak crushing capacity Fmax and the fluctuation coefficient of the bearing capacity decrease, the average crushing capacity Fmean increases, and the total energy absorption E and the specific energy absorption ESA slightly increase. ③ As the thin-wall thickness of new device decreases, the crushing peak load, crushing average load, total energy absorption and specific energy absorption all decrease, while the load fluctuation coefficient decreases first and then increases. Through the analysis of the results, it is concluded that the structure of the new energy absorption device can meet the requirements of constant resistance and large deformation when the slope of side wall is 1.2 and the thickness is 7 mm, the component meets the requirements of constant resistance and large deformation; ④The fluctuation of bearing capacity curve can be further reduced by balancing the sidewall thickness and the contact friction coefficient between members and rigid plates.

Restorative environments have a positive impact on improving the physical and mental health of the elderly. In China, the proportion of elderly residents in aging urban communities is significantly higher than in newly constructed ones, making it essential to understand the restorative potential of public open spaces (POSs) in these settings to promote the development of aging-in-place models. To investigate this issue, we employed the Fuzzy Delphi Method (FDM) and the Analytic Hierarchy Process (AHP) to construct an evaluation system for the restorative potential of public open spaces. Subsequently, we assessed the restorative effects of POSs in the Dabeizhuang community using 320 residents' questionnaires and the fuzzy comprehension evaluation method. The results indicate that the dimension of safety is the most critical factor in creating restorative environments. In contrast, the dimension of comfort is the primary reason affecting the current evaluation of the community's restorative environment. By establishing a restorative environment evaluation system, this research will facilitate the creation of more restorative environments in urban areas, thereby promoting active and healthy aging among elderly residents. [ABSTRACT FROM AUTHOR]

In this study, the digital image correlation (DIC) method and acoustic emission (AE) technology were combined to study the evolution of rock deformation localization in detail. The second-order spatial–temporal subset DIC (STS-DIC) algorithm was proposed and used for measuring strongly heterogeneous deformation fields of red sandstone specimens under uniaxial compression. The evolution of the deformation field was analyzed with a focus on the deformation localization stage. The length and width of the deformation localization band (DLB) were measured, and the relationships between the relative sliding rate of the DLB, the relative opening rate of the DLB, and the AE counts were identified. Deformation localization was found to result from the rapid evolution of the strain concentration before the peak stress. The complete development of the DLB is an inducing factor for catastrophic rock failure, and the failure modes of the rock specimens were consistent with the final state of the DLB. A good correlation was identified between the AE counts and the relative displacement rate of the DLB, and the sliding rate was found to have a significant influence on the AE counts. [ABSTRACT FROM AUTHOR]

To explore the causes of mine tremors in coal mines with sandstone roofs, a three-point bending loading experiment was designed for composite sandstone layers, and the fracture and interlayer shear slip characteristics of the composite sandstone layers were studied using optical measurement and acoustic emission techniques. The results show that the bending of the rock layers led to interlayer sliding deformation, while the fracturing greatly promoted interlayer sliding. The maximum interlayer slip accelerations during bending deformation and fracturing were 0.6 mm/s2 and 3.8 mm/s2, respectively. During the fracturing of the rock layers, the proportion of acoustic emission shear fracture events increased with the continuous occurrence of long-lasting and high-amplitude acoustic emission events. The mechanism of mine tremors in thick sandstone roofs is as follows: the increase in the area of the goaf causes rock bending deformation and fracturing, accompanied by interlayer shear slip, fracturing of the sandstone layer, and friction dislocation at the cementation surface of the adjacent sandstone layers, which jointly cause vibration of the roof. [ABSTRACT FROM AUTHOR]

The application of 3D visualization technology in building construction has also increased. The study used Revit software to construct a 3D building information model (BIM) for the exhibition space of Chuzhou Higher Education City Development Collaborative Innovation Center to achieve a 3D visualization display; based on the 3D visualization, a particle swarm optimization (PSO) algorithm was used to find the optimal path for the exhibition space, so as to achieve the layout design of the exhibition space. The PSO algorithm was optimized in terms of inertia weight, acceleration coefficient, and initial population to obtain the improved PSO (IPSO) algorithm. The experimental results showed that the optimal path found by the IPSO algorithm was 78.56 meters in distance, 98.2 seconds in time consumption, and 50.11% in smoothness, which were better than the other two algorithms. Meanwhile, the IPSO algorithm had a lower value of particle fitness function, indicating that the IPSO algorithm had the highest performance and the strongest path finding ability among the three algorithms. It is confirmed that it is feasible to use the IPSO algorithm for optimal visit path finding in 3D environment. It is effective to visualize the exhibition space in 3D by constructing a BIM.

In order to develop a kind of APAP double-release pellet capsules, which was prepared with the manual filling method, the immediate and sustained release pellets of a certain proportion were prepared by the fluidized bed coating and the extrusion spheroidization process, respectively. It was founded that both the prepared immediate-release pellets and sustained-release pellets had smooth and round surfaces. The particle size distribution ranged evenly from 16 to 35 mesh. Response surface plots showed that the optimal preparation prescription for immediate-release pellets were that ethanol concentration (X1) 70%, APAP 20%, MCC (X2) 40%, PVP K30 (X3) 20%, and sucrose pellet core 20%; and the optimal preparation prescription for sustained-release pellets were that HPMC concentration (X*3) 6.5%, APAP 30%, EC (X*1) 20%, MCC (X*2) 40%, PVP K30 4%, and lactose 6%. The results of pharmacokinetic analysis revealed that, after the APAP double-release pellet was orally administered, compared with that of conventional tablets, the plasma APAP levels in the blood circulation dramatically rose to significant peaks as a result of the quick and slow release of APAP from the capsules, which significantly prolonged the effective time of drugs in blood. Finally, immediate and sustained antipyretic-analgesic effects were obtained.

As a witness to history, industrial heritage embodies the cultural, technological, and economic values of a particular era. Transforming it into a cultural and creative park can imbue new functions and vitality, supporting and promoting sustainable urban development. This paper focuses on the Mili Cultural and Creative Park in Quanzhou as its research subject. Through interviews and questionnaire analyses from the perspective of tourists, five evaluation factors are extracted: spatial environmental elements, social cultural elements, landscape and greening elements, supporting facilities elements, and transportation and location elements. An analysis of tourist satisfaction using the semantic differential method reveals a higher satisfaction with spatial environmental elements, social cultural elements, and landscape and greening elements, while satisfaction with supporting facilities elements and transportation location elements is low. Additionally, the modified IPA method is employed for the analysis, revealing poor overall performance in supporting facilities elements and transportation and location elements. In subsequent efforts, priority should be given to improving the quantity and reasonable distribution of garbage cans, organization of events in the park, traffic conditions outside the park, parking around the park, and park accessibility. The aim is to further optimize the environment after the reuse of industrial heritage, enhance tourist satisfaction, and promote urban sustainability. [ABSTRACT FROM AUTHOR]

Overlying strata movement has an important effect on the stability of coal along goaf. In order to study the impact of overlying strata movement on the stability of coal during fully mechanized top-coal caving mining, a simulation experiment was conducted on the Liuxiang Coal Mine using digital image correlation (DIC) and stress electric measurement methods. The characteristics of overlying strata movement, stress concentration and deformation evolution of coal, and interlayer sliding between coal and rock are analyzed. The following conclusions could be drawn. The movement of overlying strata can be classified into two stages: the first stage is characterized by vertical displacement, while the second stage is characterized by horizontal displacement. In the first stage, the vertical movement of overlying strata causes the vertical stress concentration of the coal. In the second stage, the horizontal movement causes frictional sliding between coal and rock, which produces a shearing effect on the coal. Under these two effects, the coal along goaf gradually reaches its strength limit, and local deformation occurs, and the micro-cracks are further concentrated and fused in this area. When macro-cracks are formed, occur and expand unstable, the elastic energy is released suddenly, which will lead to dynamic disasters such as rock bursts. [ABSTRACT FROM AUTHOR]