Shengsong Wu, Litao Luo
Abstract.The treatment of fluorine-containing wastewater has been a hot topic in the field of water treatment, with the increasing emission standards, the current treatment of fluorine-containing wastewater has entered a policy and technology-driven phase, and the method of fluoride removal chemicals is simple and efficient in actual treatment, with significant advantages. This paper summarises the types and technological progress of fluoride removal agents in recent years, and puts forward the direction of future research and optimisation.
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Shihu Gao, Jing Wu, Xin Peng
Abstract.In the construction of subgrade filling, a lot of high quality fillers is needed to control the settlement under traffic loading. However, under the theme of environmental protection, the filling materials are becoming harder to obtain. At the same time, there will be a lot of waste soil in the river construction, waste soil treatment is also a big problem. Based on this, this paper uses the waste soil solidification treatment as the subgrade filler to solve the above problems. In order to verify the feasibility of solidified soil as subgrade filler, indoor compaction test with different …
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Xinkun Song
Abstract.As a strategy for adjusting the layout of the agricultural industry, the relocation of tea from the south to the north is gradually unfolding in the Qinba Mountain area. Soil nematodes, as important indicator organisms in soil ecosystems, have a sensitive community structure and metabolic footprint to changes in soil ecological environment during the process of southward tea migration. This article comprehensively elaborates on the structural characteristics and metabolic footprint of soil nematode communities in the Qinba Mountain area, and deeply analyzes their synergistic changes during the …
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Yanyuan Shen, Bingqing Hou, Xianyan Zhao, Yang Cao, Wenxiao Hu, Jilei Xu, Zhixing Li, Yanqi Hu, Lei Qiu
Abstract.Chemical substances of tobacco raw materials are closely related to product style and aroma quality. In this experiment, the alkaloid content, amino acid content, non-volatile organic acids and aroma-causing substances of domestic cigar tobacco were dynamically tested by high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS), and compared with those of Dominican cigar tobacco during the fermentation process. Under the proposed fermentation conditions, the alkaloid content of domestic cigar tobacco showed an overall decreasing trend, and the alkaloid content at the end of …
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Xingci Qi, Zijia Wang, Xiruo Liu, Huaidong Wen, Haoyu Zhou, Shaohan Wei, Zelong Gong, Kongyin Zhao, Xiaoyin Wang
Abstract.Ag3PO4 has attracted attention for its excellent photoresponsive utilization and good catalytic performance. However, Ag3PO4 nanoparticles are prone to aggregation and difficult to recycle. In this paper, NaAlg@Ag3PO4 photocatalytic material were prepared in-situ growth method using NaAlg as a carrier. And the NaAlg@Ag3PO4 water solution was used as the casting solution. Three different crosslinking agents, oxalic acid (OA), CaCl2 and CuSO¬4, were used to crosslink NaAlg@Ag3PO4, resulting in three photocatalytic composite membranes, denoted as OA@NaAlg@Ag3PO4, CaAlg@Ag3PO4 and CuAlg @Ag3PO4. …
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Pingyu Huang
Abstract.This paper provides a comprehensive review of the seismic design and renovation strategies for reinforced concrete (RC) structures in civil engineering. It begins with an introduction to the importance of seismic design, considering the potential threat of earthquakes to RC structures. It then elaborates on current seismic design codes, principles, and methods, including seismic load calculations, structural system design, and detailing requirements. Retrofit strategies such as reinforcement with fiber-reinforced polymers (FRP), steel sheaths, and seismic isolation techniques were also …
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Chongzheng Li
Abstract.Against the backdrop of global urbanization, this article addresses the issue of infrastructure disaster prevention and mitigation. By examining the current status and challenges of global infrastructure disasters, it highlights the dual responsibilities of civil engineers in both the prevention and response phases of infrastructure disasters. It systematically elaborates on the core role of civil engineers in disaster prevention and response, and proposes the necessity of advocating resilience design to enhance infrastructure’s resistance, recovery, adaptability, and sustainability …
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Yuan Tao, Bingru Zhang
Abstract.To evaluate the stability of amine absorbents in low-flow, low-concentration, and low-partial-pressure CO₂ absorption-desorption cycles, two key performance parameters were analyzed: the ratio of apparent cycle capacity to maximum cycle capacity (ACCR/MCCR) and the 20-cycle retention capacity. These metrics were applied to assess the absorption stability, desorption properties, and cyclical performance of ethanolamine (MEA), triethylenetetramine (TETA), N-methyldiethanolamine (MDEA), and the MDEA/TETA blend. Experimental results demonstrated that the ACCR/MCCR directly quantifies the …
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Lulu Miao
Abstract.Runoff simulation plays a crucial role in hydrological research and water resource management for scientific planning and flood control strategy formulation. To address runoff data non-stationarity, this study develops a VMD-CNN-LSTM ensemble model integrating Variational Mode Decomposition, Convolutional Neural Network, and Long Short-Term Memory network, aiming to enhance simulation accuracy and model generalization. Validated using 2008-2016 daily runoff data from the Wuding River Basin, the model demonstrates superior performance with training and testing period R2 values of 0.955 and …
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Lianjie Ding
Abstract.In order to improve the seismic performance of bridge structures, bridge isolation technology is increasingly innovating. However, current research is often limited by the contradiction between vertical bearing stiffness and seismic isolation performance: ensuring the daily operation of bridges requires high vertical stiffness load-bearing, while seismic isolation requires low dynamic stiffness. In response to this contradiction, this article proposes a Variable Stiffness Self centering Three dimensional Isolator (VSSC3DI), which consists of three parts: a vertical quasi zero stiffness …
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Genli Tang, Qiuyan Liu, Huajun Ding
Abstract.Based on the concept of CDIO Engineering Education, this paper systematically discusses the problems existing in the current master's course teaching of engineering management specialty, and constructs the master's course teaching mode of Engineering Management Specialty Based on the concept of CDIO by analyzing the core characteristics of CDIO mode and the requirements of MEM course teaching, aiming to realize the organic unity of knowledge transfer and practical innovation, effectively improve the teaching effect of the master's course of engineering management specialty, and effectively …
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Xiaofei Tan
Abstract.This study discusses the application strategies of artificial intelligence in middle school English teaching. First of all, this research analyzes the main problems in English teaching, including the difficulty of satisfying students' individual needs, the single teaching resources and the heavy burden of teachers. Then, it digs out the importance of artificial intelligence in English teaching, such as improving teaching efficiency, meeting individual needs and enriching teaching resources. On this basis, the specific application strategies are put forward, including the development of …
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Mengnan Zhang
Abstract.Despite the fact that the continuation task has various benefits for improving students’ language proficiency, it may also lead to writing anxiety among students. This paper begins by explaining the concepts of continuation task and English writing anxiety, and subsequently analyzes the factors that increase students’ writing anxiety from both teacher’s and students’ perspectives. To address this problem, this paper suggests three strategies: firstly, introducing mind mapping in continuation task teaching to aid students in understanding the story and constructing writing frameworks; secondly, …
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Qing Xia, Xiqi Zhu, Jialei Gu, Zhiyi Wang
Abstract.This paper constructs an evaluation system for airline marketing strategies, and quantitatively analyzes the typical strategies of airlines using fuzzy comprehensive evaluation method, analysis hierarchical method (AHP) and Topsis method. The study firstly screens strategies from product, price, channel and promotion dimensions, and obtains evaluation data from industry experts through expert scoring method. Based on the fuzzy comprehensive evaluation model, the evaluation is carried out from the first-level indexes of input cost, output benefit, and innovation drive, and the advantage score …
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Linhua Jiang, Wenbiao Ye, Wei Long, Wenbo Guo, Lingxi Hu
Abstract.Predicting drug-target affinity is crucial in the field of drug discovery. To further improve the accuracy of predictions, this paper proposes a drug-target affinity prediction model, GRAM-DTA, based on graph representation and attention fusion mechanisms. The model represents the input features of drugs and targets as graph data and utilizes deep graph isomorphism networks and graph neural network modules combining graph convolutional networks and graph attention networks to process the feature information of drugs and targets, respectively. In the feature fusion stage, an attention mechanism …
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Zhisen Li, Min Liu, Jincan Zhang, Kun Xu, Bowen Zhang, Tonghe Huang, Yiming Wang
Abstract.In this paper, a differential cross-coupled Colpitts voltage control oscillator (VCO) based on 1 µm GaAs HBT technology is presented, and response surface method (RSM) is used to co-optimize the phase noise, center frequency, and tuning range of the VCO. The differential cross-coupled structure is used to provide negative resistance and the Colpitts structure is applied for achieving low phase noise. Then, we choose five parameters of the VCO circuit through establishing RSM model, in order to find the optimal combination of VCO circuit design parameters and to obtain the best performance. The …
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Yulu Wei
Abstract.With the improvement of living standards, the output of rural domestic sewage is also increasing. How to treat sewage and effectively use sewage has become the main technical bottleneck restricting the social and economic development of the Loess Plateau. The construction cost of constructed wetland is low, the construction form is flexible, and the landscape greening of courtyards and villages can be organically combined with the sewage treatment, which is in line with the guiding direction of local sewage consumption in rural areas. The existing problems of rural sewage treatment are …
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Siqi Wen
Abstract.In recent years, a"teaching-evaluation integrated" assessment model has emerged-Dynamic Assessment(DA), which has gradually become a hot topic for scholars at home and abroad. Whereas the effectiveness of dynamic assessment has been investigated in multiple contexts, it has been under-investigated in the context of blended learning mode for writing performance. To address this gap, this study aims to construct a dynamic assessment mechanism for blended English writing. Based on Vygotsky’s socio-cultural theory,the dynamic assessment theory system is integrated into the entire process of …
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Yuxuan Yao, Shenglan Ye
Abstract.This paper introduces the sources of agricultural runoff pollution and reviews control technologies for agricultural runoff pollution from the perspective of "source control-process interception." It analyzes integrated technology cases in real-world scenarios, using the Taihu Basin in Jiangsu Province and Jiaxing City in Zhejiang Province as examples to illustrate the application effects of the "source control + process interception" and "smart monitoring + dynamic regulation" systems. These integrated technology models have significantly reduced pollutant levels in agricultural runoff and …
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Wangjin Xie
Abstract.The construction of self-evaluation and feedback management system for students in English language teaching is based on information technology and with the help of computer network technology, multimedia technology, data collection and analysis algorithm, and English language teaching theory. The system can reduce the workload of teachers and parents, improve the effectiveness of English language teaching, and make the information fully flow and shared between teachers and students and between home and school, so as to truly improve the learning efficiency of students, promote the development …
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Xinkun Song
Abstract.This study focuses on land remediation projects in ecologically fragile areas, systematically constructing a carbon effect measurement system covering construction, land use structure changes, and farmland management and protection stages, and deeply exploring its inherent relationship with ecological compensation mechanisms. Through empirical research on a typical project area in the northwest Loess Plateau, quantifying the carbon effects at each stage, analyzing the existing problems of ecological compensation mechanisms, and proposing targeted optimization strategies including dynamic …
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Ruirui Zeng
Abstract.This paper focuses on junior high school English grammar teaching. Considering the numerous problems in traditional grammar teaching methods, exploring teaching strategies based on thematic contexts is of great significance. By analyzing the current teaching difficulties, it elaborates that teaching based on thematic contexts is helpful for improving students’ language application abilities and emphasizes its crucial role in language learning. The strategies include designing thematic contexts closely related to life, using multimodal resources, and conducting in-depth analysis of grammar …
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Yunzheng Ding
Abstract.This article focuses on the actual needs of bookstores and designs and develops a small e-commerce website based on JSP, namely the online bookstore system. The technical solution adopted by the bookstore system is: JSP+Tomcat+SQLServer2000. The main functions of an online bookstore system based on JSP are two-fold: front-end user and back-end management. The main functions of the backend include: adding and deleting book information, querying book information, setting user levels, publishing notifications, managing book categories and publishers, querying and summarizing book sales …
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Chenhao Li, Xiaoli Zhang
Abstract.With the development of green chemistry, metal complex-catalyzed oxidation of alkanes (linear and cyclic) has emerged as a key strategy for the efficient conversion of inert C(sp³)–H bonds. This review summarizes recent advances in the selective oxidation of alkanes under mild conditions using metal complexes (e.g., Cu, Fe, Co, Ni), with a focus on ligand design and its regulatory effects on catalytic activity and selectivity. These systems employ radical or metal-oxo intermediate pathways, utilizing green oxidants such as H₂O₂ or O₂, significantly reducing energy consumption and byproduct …
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Jianchuan Wu, Junhan Li, Jianfa Wu, Zilu Tian, Ziwen Xu
Abstract.This study systematically analyzes the physicochemical properties and safety risks of 32 categories of explosive-precursor chemicals commonly used in engineering university laboratories. By examining 127 laboratory accident cases reported by the Ministry of Education from 2019 to 2023, it reveals the correlation between management loopholes and accidents. Based on the Regulations on the Safety Management of Hazardous Chemicals and the GB 15603-2022 General Rules for the Storage of Common Hazardous Chemicals, a graded classification storage model and a dynamic supervision system are proposed. …
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Linxi Jia
Abstract.This article systematically reviews the latest progress and main challenges in the research of shale oil reservoir characteristics. As an important unconventional oil and gas resource, the study of shale oil reservoir characteristics is of great significance for resource evaluation and development. The article elaborates in detail on the main characteristics of shale oil reservoirs from five aspects: geological features, physical properties, geochemical features, mechanical properties, and development characteristics. It analyzes the key issues and challenges in current research and looks …
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Xitong Zhai
Abstract.Drilling engineering is a complex and high-risk operation, and its construction progress is affected by various uncertain factors, such as the complexity of geological conditions, the variability of the working environment, and the complexity of construction methods and design parameters. In order to improve the accuracy of predicting the construction progress of drilling operations, this paper studies the drilling construction progress prediction model under uncertain conditions. By analyzing the influencing factors of drilling construction progress, including geological conditions, equipment …
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