Abstract.The pollution of microplastics in the environment has attracted worldwide attention, and research and reports on microplastic pollution in soil have gradually increased in recent decades. Currently, microplastic particles can be accurately detected through Raman spectroscopy or Fourier-transform infrared spectroscopy, allowing for individual particle analysis and visual identification of suspicious microplastic particles. However, analyzing a large number of particles using spectroscopic detection techniques is time-consuming, thus there is an urgent need to develop a new detection technology … Read more →

Abstract.In contemporary society, elevators stand as indispensable facilitators, particularly for users in tall buildings, contributing significantly to convenience. Their role becomes even more crucial for individuals with disabilities, serving as a vital means of transport to enable them to partake in modern life. However, a challenge emerges in the form of buildings erected during the 1970s or 1980s, lacking initial designs of elevators. This absence of elevator well designs presents substantial issues for building users, especially residents. However, many of these buildings have not reached the … Read more →

Abstract.This experiment uses polyglutamic acid water-soluble fertilizer produced from glutamic acid fermentation waste liquid as the experimental fertilizer to study its impact on maize yield and quality in maize cultivation. The results showed that compared to farmers who are accustomed to fertilization, the application of the new water-soluble polyglutamic acid fertilizer reduced the bald head length of corn by 0.7 cm; The weight of 100 grains of corn increased by 0.7g, resulting in an increase of 26.7 kilograms of corn per mu, with a yield increase of 5%. Read more →

Abstract.The study of cyclic graphs has always been a hot topic in the field of graph theory and has received widespread attention from graph theory practitioners. If an n-order graph G exactly contains cycles of all lengths from 3 to n, then the graph is called a pan cycle graph. This article proves that, after excluding some special cases, when the number of edges in graph G is greater than or equal to C2n-3+12, graph G must be a pan cyclic graph. Read more →

Abstract.Effective cost control during the bidding stage of construction projects is crucial for the success of project management. The process starts from a thorough pre bidding stage, including feasibility studies, risk assessments, and realistic budget formulation. In the bidding process, setting clear standards, evaluating suppliers, and evaluating based on various factors such as cost, technical qualifications, and past performance are key steps. Through comprehensive measures, it can be ensured to minimize risks and improve project efficiency to the greatest extent possible. Read more →

Abstract.Hydroxyapatite, with excellent biocompatibility, biological activity, and biological affinity, is the main inorganic component of human bones and teeth. It can promote bone tissue regeneration and has important applications in bone tissue engineering fields such as bone defect repair and bone replacement. In this study, calcium acetate solution and diammonium dihydrogen phosphate solution had been mixed to prepare calcium phosphate through aqueous precipitation reaction. The testing results of scanning electron microscopy and X-ray diffraction show that the morphology of the product can be … Read more →

Abstract.Situational language teaching is one of the more common methods in English classrooms. It is to create authentic situations for students to make connections in the process of acquiring knowledge, allowing students to naturally work through their prior knowledge and life experiences. Although this teaching method has certain advantages, there are limitations in its application, and it is challenging to use it flexibly to achieve teaching objectives in the background of the English new curriculum standard in China. Read more →

Abstract.In order to ensure China's grain output and food security, we should upgrade the grade of farmland, increase farmers' income, and realize the storage of grain in the land and the storage of grain in technology. While promoting the planning tasks of high-standard farmland construction projects issued by the state and Shaanxi Province, through the determination of soil nutrient indicators in the proposed high-standard farmland area in Fengxiang District, it is pointed out that the average content of soil organic matter in the study area was 12.18 g/kg, which was relatively insufficient as a … Read more →

Abstract.With the continuous advancement of education and teaching reform, higher requirements have been put forward for English teaching. In China, the continuation task has been incorporated into the National Matriculation English Test for testing students’ comprehensive English ability since 2016. However, it also has become a burden that most teachers and students are anxious about. In senior high school English classrooms, teachers are required to integrate reading and writing effectively so as to achieve the purpose of cultivating students’ core competency. Hence, based on schema theory, this … Read more →

Abstract.Polyglutamic acid produced from the mother liquor of glutamic acid crystals was used as a test fertiliser to study its application in cucumber cultivation. The results showed that the application of polyglutamic acid fertiliser could increase cucumber plant height, plant pitch, number of leaves, root dry matter weight, promote cucumber growth, increase cucumber single melon weight and total yield, and at the same time, it could increase the content of Vc and soluble sugar in cucumber fruits and improve the quality of cucumber. Among them, the application of polyglutamic acid fertiliser … Read more →

Abstract.The goaf of coal mine is accompanied by residual coal, and the possibility of spontaneous combustion determines whether the mine can work safely. Therefore, the division of "three zones" of spontaneous combustion in goaf under different working conditions is of great significance. This paper takes the 3154 fully mechanized coal face of Longmen Xianan Coal Mine as the research background to explore the "three belts" distribution under the Y-type ventilation mode. Based on the laboratory measured coal related spontaneous combustion characteristic parameters, the division standard of "three … Read more →

Abstract.According to the actual requirements, it is necessary to design a line connecting the 150MW hydropower station and the 230KV hydropower station. The first is to plan the overall process of the project, by consulting the data, objectively evaluating the transmission line parameters, combining Matlab and Excel to calculate the transmission line parameters, including barrier current calculation and safety analysis, and finally combining power system simulation and cost calculation, the only one is selected from hundreds of scenarios. Rationale, power flow analysis, and power loss analysis are … Read more →

Abstract.With the wide application of ground drive screw pump in the process of oil production, the wear problem of screw pump sucker rod-tubing is becoming more and more prominent. In order to systematically study the wear of the rod and tube of the screw pump production well and quantify the wear of the rod and tube, this paper establishes a calculation model of the contact force of the screw pump sucker rod by analyzing the force of the rod and tube string in the three-dimensional wellbore trajectory. Based on the indoor rod and tube wear simulation experiment, combined with the wear efficiency … Read more →

Abstract.This article investigates the impact of exercise on endothelial cell function and its underlying mechanisms. Endothelial cells play a key role in maintaining cardiovascular health, and their dysfunction is closely associated with various cardiovascular diseases. Research shows that exercise improves endothelial function through various mechanisms, including increasing the production of nitric oxide (NO), reducing inflammation levels, improving lipid metabolism, and promoting angiogenesis. These effects collectively contribute to reducing the risk of cardiovascular diseases. It is hoped to … Read more →