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As the concluding activity of the Spring Festival in Northwest China, Liaogan is a distinctive local folk religious practice. This article, taking Qingyang City, Gansu Province, as a case study, employs anthropological fieldwork methods to present the entire process of the Liaogan ritual, trace its historical development and folk cultural connotations, and analysis the role of Liaogan in shaping social cohesion and the daily lives of Northwest people. The paper posits that Liaogan originates from humanity's shared belief in fire and the god of fire, representing a remnant of primitive religious beliefs. The purpose of Liaogan is to ward off evil, eliminate diseases and disasters, and fulfill people's hopes for a bountiful harvest. In this beautiful prayer process, a daily social function of purifying the soul and maintaining social relationships manifests itself in seemingly unconscious activities and continues to serve a symbolic social function in modern society.

An adaptive tracking algorithm based on Extended target Probability Hypothesis Density (ETPHD) filter is proposed for extended target tracking problem with priori unknown target birth intensity.The algorithm is implemented by gaussian mixture, where the target birth intensity is generated by measurement-driven, and the persistent and the newborn targets intensity are respectively predicted and updated. The simulation results show that the proposed algorithm improves the performance of the probability hypothesis density filter in the extended target tracking.

For the problems that Gamma Gaussian Inverse Wishart Cardinalized Probability Hypothesis Density (GGIW-CPHD) filter cannot accurately estimate the extended target shape and has a bad tracking performance under the condition of low SNR, a new generalized labeled multi-Bernoulli algorithm based on Gaussian process regression is proposed. The algorithm adopts the star convex to model the extended target, and realizes the online learning of the Gaussian process by constructing the state space model to complete the estimation of the extended target shape. At the same time, in the low SNR environment, the target motion state is tracked by the good tracking performance of the generalized label Bernoulli filter. Simulation results show that for any target with unknown shape, the proposed algorithm can well offer its extended shape and in the low SNR environment it can greatly improve the accuracy and stability of target tracking.

With the growing complexity of the business context, companies are confronting more challenging Product Development (PD) projects because of the potential risks externally brought by the partners’ participation and internally accumulated through the activities’ execution. In this paper, we formulate and decompose a PD project in a hierarchical way, and the obtained end elements perceived as objects are built into a number of Design Structure Matrices (DSMs) and Domain Mapping Matrices (DMMs). We also propose a conceptual model of change occurring and change propagation, base on which the potential change propagating channels are discovered through observing and tracking change occurring and change propagation in DSMs and DMMs. Associated with the depth-first and breath-first search methods executed in matrices the critical objects during change propagation are discovered and the implicit change propagating channels cross multiple fields are identified. As the exploratory results, the critical objects taking account of change propagation are highlighted as the contribution to change management in PD project.

With the development of mobile Internet in China and the popularity of mobile phones and various mobile devices, the demand for APP interaction design is becoming more and more common. China’s APP interface design industry started late, and a large number of international and standardized design styles have occupied the APP application market. Chinese traditional culture is extensive and profound, with rich cultural connotation and historical deposits. How to apply traditional cultural elements to APP interactive interface design and how to display traditional culture through APP interaction are the topics we want to study. We should give traditional Chinese culture vitality in the new era, and integrate it into the interactive interface of modern apps, so that traditional Chinese culture can be more widely inherited and carried forward.

As sound therapy, Songbo Sound Therapy is widely used around the world for the treatment of sleep disorders and physiotherapy. Therefore, it is of great significance to explore consumers’ willingness to purchase Songbo Bowl products and their influencing factors to enhance consumers’ willingness to purchase and to promote the high-quality development of China’s sound therapy instrument industry. The empirical results show that among the four dimensions affecting consumers’ willingness to buy, consumers’ price sensitivity, awareness and trust significantly affect consumers’ willingness to buy, and consumers’ perceived value is also a factor affecting willingness to buy. From the study of the four dimensions of willingness to buy, this paper finds that young people in faster-developing cities have a higher demand for Songbo products used to alleviate insomnia and other diseases, and at the same time, sound therapy is included in the national health insurance for the first time in 2022, which indicates that the sound therapy products have gone to the public. Targeted countermeasures and recommendations from the government level. The government should increase the publicity and promotion of sound therapy products, enhance consumer awareness and health consciousness, and establish a sound product feedback system and regulatory mechanism.

This paper deals with the evaluations of lower and upper bounds of dynamic responses and natural frequencies for structures with uncertain interval parameters. The structural physical parameters, geometric dimensions and initial conditions can be considered as interval parameters. The modified Chebyshev interval method (MCIM) is presented to handle the uncertainties. In comparison with the Chebyshev interval method (CIM), MICM provides with tighter bounds of the time responses and natural frequencies without a significant increase in computation time. Monte Carlo method is also used to provide with exact bounds. MICM, CIM and Monte Carlo method are applied for structures with interval parameters, and the efficiency and accuracy of CIM and MCIM are verified.

Many constitutive models’ finite element (FE) models and lumped parameter models included have been presented for rubber bushings. In general, the FE models cannot be directly used in mechanical multibody systems with bushings, and the lumped parameter models can not consider the coupled modes of deformation of bushings. For this reason, a two-dimensional lumped parameter model for rubber bushings is presented, which considers the coupled radial-torsional deformation and can be easily implemented into mechanical multibody systems. FE method is used to simulate the rubber bushing subjected to a coupled radial-torsional deformation. A procedure to determine the model parameters is presented. The proposed coupled bushing model and a traditional one-dimensional bushing model are applied into a simple multibody system and compared. Simulation results show the coupled radial-torsional behavior of the bushing.

At present, the world is undergoing profound changes unseen in a century, and the international political and economic governance system is undergoing profound changes. Protectionism and antiglobalization are on the rise, and the normalization of COVID-19 prevention and control has intensified international investment and economic and trade frictions. The domestic and foreign environment faced by the overseas investment and merger of Chinese power enterprises is increasingly complex, and the potential risks and uncertainties are increasing. Combing the energy industry key risk points of transnational mergers and acquisitions, this paper analyse the energy industry transnational M&A project political risk and legal risk evaluation method, and put forward the company transnational M&A project political risk and legal risk prevention strategy.

Severe ecological and environmental problems have deeply threatened the sustainable development of human society. In response to the severe challenges faced by mankind, the green development of coal enterprises has become an irreversible wave. This article analyzes the relevant conditions of China’s coal resources based on the 2020 World Energy Statistical Yearbook published by BP, and estimates the peak coal resources based on the Hubbert Peak Model, expounding the need for coal companies to develop green development and coal companies Develop a practical and feasible path for green development, and contribute to the green transformation and development of Chinese coal enterprises. The optimization path is mainly reflected in the following aspects: the government needs to increase policy support, enterprises actively improve the level of green development, and strengthen the team building of high-quality employees.

The thermal reservoir in Taiyun area mainly consists of Ordovician and Cambrian carbonate formations. The target interval of example well contains more than 95% carbonate, being thick, argilliferous and have well-developed natural fissures and rich hot water. However, sometimes stimulation is necessary to achieve the designed water production rate. In this paper, multistage alternating injection acid fracturing technology is selected according to lithologic characteristics of geothermal reservoir. A gel acid, which is a composite of 20%HCl+0.8%SHY1+2% corrosion inhibitor+1.5% iron ion stabilizer+1% cleanup additive, is optimized and developed by experimental tests. Its viscosity can reach 27 mPa·s. Then, pumping schedule of multi-stage alternate injection acid fracturing is optimized by numerical simulator of acid fracturing design. It is shown from job pressure of field sample well that resistance reduction ability of gel acid needs to be further improved. Moreover, from the analysis results of pressure decline after acid fracturing, the fluid efficiency is 42.32%, net pressure is 3.3 MPa, and the dynamic fracture length is 107m, the maximum fracture width is 8.6mm by fitting treatment pressure. The water production increase factor reaches 1.2 after acid fracturing treatment. Therefore, the acid fracturing treatment is successful.