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As e-commerce has revolutionized the habits and methods of mass consumption, the reliance of the real economy on the Internet for advertising and marketing has become more and more pronounced, and this phenomenon has been exacerbated by the COVID-19 pandemic. Many municipal governments in China have introduced policies to encourage the development of nighttime economy as an important means to revive urban vitality, stimulate mass consumption and promote economic development. This essay takes four established nighttime economy gathering places in Guangzhou as examples, and studies the symbolic consumption process in them from the theoretical perspectives of cultural economy, leisure economy, symbolic economy and cultural capital, thus pointing out the problems of cultural change and cultural vulgarization in the nighttime economy neighborhoods and giving constructive solutions and suggestions for improvement.

The ubiquitous presence of phenolic compounds in effluents poses a risk to aquatic organisms and human health. This study investigates the responses of the emerging algal-bacterial granular sludge process in treating phenolic wastewater. The results showed that phenol at 1, 10, and 100 mg/L had little effect on ammonia-N, chemical oxygen demand (COD), and phosphate-P removal. At the highest phenol concentration of 100 mg/L, the average removal rates of ammonia-N, COD, and phosphate-P were 94.8%, 72.9%, and 83.7%, respectively. The presence of phenol led to a decline in chlorophyll content of the algal-bacterial granular sludge, concurrently resulting in an increase in the abundance of microbial diversity. Algal-bacterial granular sludge exhibited mechanisms such as elevated extracellular polymeric substances (EPSs), superoxide dismutase (SOD), and catalase (CAT) production, which may aid in coping with oxidative stress from phenols. This research underscores the algal-bacterial granular sludge's potential for treating phenolic wastewater, thereby advancing knowledge in the field of phenol degradation with this innovative technology. [ABSTRACT FROM AUTHOR]

In modern scientific practice, it is necessary to consistently observe predetermined zones, with the expectation of detecting and identifying emerging targets or events inside such areas. This research presents an innovative imaging spectrometer system for the continuous monitoring of specific areas. This study begins by providing detailed information on the features and optical structure of the constructed instrument. This is then followed by simulations using optical design tools. The device has an F-number of 5, a focal length of 100 mm, a field of view of 3 × 7, and a wavelength range spanning from 400 nm to 600 nm. The optical path diagram demonstrates that the system's dispersion and imaging pictures can be distinguished, hence fulfilling the system's specifications. Furthermore, the utilization of a Modulation Transfer Function (MTF) graph has substantiated that the image quality indeed satisfies the specified criteria. To evaluate the instrument's performance in the spectrum observation of fixed regions, a region-monitoring-type slitless imaging spectrometer was built. The equipment has the capability to identify a specific region and rapidly capture the spectra of objects or events that are present inside that region. The spectral data were collected effectively by the implementation of image processing techniques on the captured photos. The correlation coefficient between these data and the reference data was 0.9226, showing that the device successfully measured the target's spectrum. Therefore, the instrument that was created successfully demonstrated its ability to capture images of the observed areas and collect spectral data from the targets located within those regions. [ABSTRACT FROM AUTHOR]

The synergistic effect of light stabilizer and antioxidant was used to improve the anti-aging properties of waste polypropylene recycled materials. The mechanical properties and surface morphology of waste polypropylene recycled materials after xenon lamp aging were tested. The effects of light stabilizer and antioxidant on the anti-aging properties of waste polypropylene recycled materials were discussed. The results show that the anti-aging effect of waste polypropylene recycled materials is better when the ultraviolet absorption light stabilizer (UV327) and hindered amine light stabilizer (770) are added together. When antioxidant 1010 and antioxidant 168 are added together with light stabilizer, synergistic effect can be produced to improve the anti-aging effect of waste polypropylene recycled materials. When the light stabilizer component (UV327/770) is 0.1 phr, the antioxidant (1010) is 0.1 phr, and the antioxidant (168) is 0.2 phr, the impact strength retention rate (90.3%) of the waste polypropylene recycled material is the best after 480 h aging, the retention rate of elongation at break (53.4%) and the retention rate of tensile strength (111.2%) are better, and the pulverization process is effectively delayed. [ABSTRACT FROM AUTHOR]

The study of urban building combinations is necessary to achieve sustainable urban development, as through such a study we can better grasp the process of urban development and evolution, guide the direction of future urban development, optimize the urban ecological environment, and improve urban livability. With the acceleration of China's urbanization process, the development and evolution of building combinations in China's urban areas are also gaining momentum. Therefore, it is of tremendous practical use to explore the laws related to mixed developments in urban areas to guide rational urban planning and the study of urban microclimates. The analysis is an important foundation for the development of urban landscapes and provides important scientific support for the optimization of the urban ecological environment and the improvement of livability levels. From the data on individual buildings in Guangzhou in 2017, this paper determined basic building combinations in the main urban area using two indexes for building height and building spacing, identified building combinations on a wider scale using a hot-spot analysis, and analyzed the spatial distribution of building combinations and the influence of macro and micro factors. Nine building combinations were identified on the basis of average height and spacing of building convergence surface. As the basic units, the nine basic types were further divided into different combinations to form complex and diverse three-dimensional representations of buildings in the main urban area. Building convergence surface with a scale of hundreds of meters constitute the basic unit of building combination in the main urban area, and are dominated by mixed land use types. The basic types, mainly composed of high-rise buildings, played an obvious role in indicating land use with differences in combinations of each functional area. The basic types of main urban areas have prominent circle differentiation, but the laws for the different types differ. Land price was the core constraining factor for the decrease in urban building height and population density from the urban center to the periphery, as well as the background factor related to differences in urban building combinations. The influence of green spaces, the Pearl River, and the main road on the type, height, and density of the building combination at a micro level complicated building combinations.