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    02 December 2023, Volume 39 Issue 6
    An Experimental Study on Acid Leaching of a Copper Oxide Ore in Yunnan
    YANG Zhihong, Ll Yongjia, ZHANG Jinliang, Ll Yingjuan
    2023, 39(6):  1.  doi:10.3969/j.issn.1009-0479.2023.06.001
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    Aiming at a low-grade oxidized copper ore resource in Yunnan province , this paper adopts thetreatment process of sulfuric acid leaching with low investment , fast effectiveness and low pollution, andfocuses on the influence of leaching agent coneentration, mineral particle size, liquid-solid ratio , leac.hing time , leaching temperature and stirring intensity on copper leaching rate. Through the experimentalresearch , it was found that the low-grade oxidized copper ore is suitable for sulfuric acid leaching treat.ment. The optimum parameters are obtained, namely, concentration of leaching agent is 220 g/kg, themineral size is 40 mesh, the liquid-solid ratio is 3: 1 , leaching for 4 h, the leaching temperature is 60℃Cand the stirring intensity is 500 r/min. Under the conditions of the best acid leaching parameters, theleaching rate of the oxidized ore reaches 84% , the concentration of copper ion in the leaching solutionreaches 6. 9 g/L, and the grade of copper in the leaching residue is reduced to about 0. 26% . The exper-imental results make the low-grade copper resources that have not been effectively developed and utilizedin the past can be gradually developed, effectively expand the scope of copper resources, and have cer-tain economic and social benefits , providing a reference for similar mineral treatment and utilization oflow-grade copper resources.
    Study on the Optical Properties of Nitrogen-Doped Graphene Films
    ZHAN Xianghao, TlAN Pin, TANG Libin, YU Jie
    2023, 39(6):  9.  doi:10.3969/j.issn.1009-0479.2023.06.002
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    In this paper, using glucose as carbon source and 2, 4, 6 - triamino-pyrimidine as nitrogensource , nitrogen-doped graphene films were grown by vacuum annealing at high temperature, and variousphotoelectric properties of the grown nitrogen-doped graphene films were characterized. Raman character.ization confirmed that the film is a multilayer graphene film with certain defects but crystallinity is good.XPS characterization also confirmed that nitrogen was successfully doped into the graphene lattice structure and covalent bond, Through transmission electron microscopy , many quantum dots with diameters ol20 ~ 30 nm are attached to the surface of the film , and the film morphology is relatively dense. The UV.Vis absorption spectrum test confirmed that the absorption peak of the doped graphene film produced acertain degree of blue shift , and the overall absorption capacity of the film was enhanced after nitrogen doping.
    Theoretical Calculation and Common Control Measures for Diagonal Ventilation Network in Non-Coal Mines
    TIAN Min
    2023, 39(6):  15.  doi:10.3969/j.issn.1009-0479.2023.06.003
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    In order to analyze the airflow characteristics of the diagonal ventilation network , the theoreti.cal expression of the total ventilation resistance of the simple diagonal ventilation network is establishedbased on the mine ventilation theory and the numerical calculation method. hrough calculation of thecomputer program of the total ventilation resistance of the diagonal ventilation network, it is concludedthat the total ventilation resistance of the diagonal ventilation network is only related to the ventilation re-sistance of each ventilation path, and does not change with the change of the total ventilation volume.Meanwhile , the diagonal ventilation network of the ring rail transportation middle section and mining areais analyzed according to the mining example of non-coal mine with multiple sections and multiple segments mining at the same time. It is put forward that the main control measures of diagonal ventilationnetwork are resistance increase regulation and pressure increase regulation , which denies the feasibility ofincreasing the total ventilation volume regulation of the whole mine, and has a reference for daily ventila-tion management.
    Discussion on the Current Situation and Innovation of Mechanical and Electrical Equipment Management in Coal Mines
    GU Zhixiang, ZHANG Hui
    2023, 39(6):  22.  doi:10.3969/j.issn.1009-0479.2023.06.004
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    With the rapid development of technology and the continuous expansion of coal mine produc-tion scale , the application range of electromechanical equipment will become wider, the application envi.ronment will become more complex, and more and more types of faults will oceur. The dependence of e.lectromechanical management work on advanced technology will also become stronger. In order to im-prove the management level of mechanical and electrical equipment in coal mines and achieve safe andefficient production in coal mines, this article deeply analyzes the problems and difficulties in the currentmanagement of mechanical and electrical equipment in coal mines from the perspectives of management concepts, management systems, management technical means, and professional technical talents. Basedon the actual development of the coal industry in Yunnan, this article aims to propose measures to transform management concepts,improve management mechanisms, innovate management models andstrengthen the construction of talent team, and introduce eMES mechanical and electrical managementsystem and PO Easergy A5 power load automatic control system. The aim is to provide some reference forthe management of mechanical and electrical equipment and talent cultivation of relevant coal mining en-terprises in our province.

    Experimental Study on Sewage Treatment Enhanced by Modified Zeolite in MBR
    CHENG Yongwei, Ll li, PAN Jie, REN Youchang, PENG Yi
    2023, 39(6):  27.  doi:10.3969/j.issn.1009-0479.2023.06.005
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    Natural zeolite is widely used and has a certain adsorption capacity for pollutants such as nitro-gen and phosphorus in domestic sewage. After modification by physical and chemical methods, the porosityand adsorption effect of zeolite can be improved, so as to effectively remove ammonia and phosphorus insewage. To achieve the purpose of effectively removing each substrate, natural zeolite was used as carrierin this paper, particles were prepared by alkaline pretreatment and salt ( sodium chloride solution) compos.ite modification. Sewage treatment in MBR were studied on the compound modification zeolite granules.The effects of amount of modified zeolite , reaction temperature and reaction time on the removal efficiencyand adsorption capacity of various substrates ( such as COD, 'TP and NH,’ -N) in wastewater were investiga-ted. The results showed that when the dosage of MZ is 10 g/L, the removal rate of COD, NH,' -N and TPin wastewater is the best, and the microorganisms are enriched with MZ adsorbent as the carrier, the ad-sorption traits are improved, and the removal efficiency of substrates also increased.
    Preparation and Properties of PVA/Shellac Resin Membrane
    Jl Haobo, ZHANG Hong, TANG Baoshan
    2023, 39(6):  31.  doi:10.3969/j.issn.1009-0479.2023.06.006
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    Both PVA and shellac resin are easy to form film , and both of them are mainly used in mem-brane products. In order to improve the poor water vapor permeability and high brittleness of shellac resinafter film formation, PVA was specially added and blended with shellac resin in aqueous phase when w(PVA)was0%,10%,20%, 30% , 40% and 50% , respectively. The feasibility of the two films wasstudied and the film forming process was determined: preparing shellac resin aqueous emulsion and PVAaqueous solution respectively , and mixing them evenly at 50 ℃. Finally, pour the liquid into the petridish , dry and form a film. The surface morphology, water drop contact angle and hygroscopicity of thefilm - forming samples were measured respectively. The results show that PVA and shellac resin have cer.tain physical compatibility, and the addition of PVA improves the compactness of shellac resin mem-brane , and with the increase of PVA content, the compactness of PVA/ shellac resin membrane inereases , and the degree of chemical reaction between them is low. When the mass fraction of PVA was thehighest [a (PVA) 50% ], the hydrophilicity and hygroscopicity of PVA/ shellac resin membrane werethe strongest , which indicated that the addition of PVA improved the hydrophilicity of shellae resin, andthe greater the amount of PVA added, the greater the hydrophilicity and hygroscopicity of the membrane.
    Practical Implementation of Campus Network Security in College Under Multi-network Integration
    KONG Xiuping
    2023, 39(6):  39.  doi:10.3969/j.issn.1009-0479.2023.06.007
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    In the context of the lntermet of 'Things , the coexistence of multiple networks, including wiredwireless, and loT, has become the norm in colleges. The rapid advancement of digitalization in highereducation has aceelerated the swilt implementation of "multi-network convergence”. However, the chal.lenge lies in how to strategically plan and merge these networks to reduce operational and managementCosts.Moreover, ensuring network security by effectively controlling access across the entire networkpost-convergence has emerged as a new challenge. In light of these considerations, this paper introducesa “ multi-network convergence" solution to address these challenges. This approach is predicated on thenotion of self-operating networks, enabling controlled and manageable access for campus users. t em.ploys a single physical network to carry wired , wireless , and loT traffie while segmenting network addressranges based on business requirements. Flexible techniques such as multi-factor authentieation and intranet subdomain isolation are implemented to achieve minimal interconnectivity of permissions among di.verse users and services across the entire network, Taking Yangzhou Polytechnie Institute as a case stud-y, the proposed solution was practically implemented, successfully achieving the secure convergence ofmultiple networks on the campus while maintaining control over access permissions. The results of thispractical application demonstrate the effectiveness and universality of the proposed method.
    Analysis of the Stylistic Characteristics of Different Schools ofthe Tang Dynasty Poetry Based on NLP and Statistical Methods
    LI Mengqiao, SHEN Fanqi, MA Ming, ZHANG Chaoyuan
    2023, 39(6):  46.  doi:10.3969/j.issn.1009-0479.2023.06.008
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    Tang poetry is the cultural treasure of our country, with a large quantity, diverse styles andthemes. In order to discuss the characteristics of Tang poems of different schools, based on natural lan-guage word processing, this study analyzed the stylistic characteristics and differences of the poems of fivemajor schools , namely , landscape pastoral poetry , frontier poetry , romantic poetry, realistic poetry and epic poetry , using statistical methods such as k-means + + cluster analysis, repeated measurement variance a.nalysis and paired sample t test. The results show that Tang poetry itself has strong commonality, such as“* thousands of miles" , “ten thousands of miles" , “where" and other keywords 'TF-lDF values are relativelyhigh in different schools. In terms of poetry characteristics of different schools, romantie poetry and realisticpoetry , frontier poetry and epic poetry , romantic poetry and epic poetry have high similarities in the use ofkeywords , and the p-values of TF-DF values of different keywords after paired sample t-test are 0. 9730. 383 and 0. 052 , respectively. There are significant differences between the other genres.
    Research on Navigation Path Planning Algorithm for Unmanned Shovel Loaders Based on Improved Dijkstra
    YIN Yehua, Ll Yuncai, Ll Ping
    2023, 39(6):  55.  doi:10.3969/j.issn.1009-0479.2023.06.009
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    This study aims to develop an enhanced Dijkstra algorithm to optimize navigation path planningfor unmanned shovel loaders in underground mining environments. In the traditional Dijkstra algorithmthe shortest path tree is generated by continuously selecting the nearest unvisited node from the startingpoint. However, in underground mining environments, additional factors need to be considered, such asterrain, mineral distribution, and safety factors. By deriving a new kinematic model and incorporating itinto the algorithm , the improved algorithm can provide safer and more eficient path planning. Throughpractical case studies, this paper demonstrates the efectiveness and potential applications of the enhancedDijkstra algorithm in underground mining navigation.
    A Study on the Plant Landscape Satisfaction of Suburban Parksin Zhangzhou City Based on IPA Analysis
    WANG Yayun
    2023, 39(6):  62.  doi:10.3969/j.issn.1009-0479.2023.06.010
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    Suburban parks have good natural plant landscape resources and paying attention to usersneeds has become a key point in creating a natural and wild atmosphere in suburban parks. In this study .when the plant landscape of Longwen section of Zhangzhou Suburban Park was taken as a research case .the tourists' satisfaction with the plant landscape was obtained by issuing field questionnaires, and theImportance-Performance Analysis ( IPA) was used to analyze the satisfaction of tourists to the plant landscape of the suburban park. The results show that the travel time of tourists in suburban parks is concen.trated on weekends or holidays, accounting for 89. 13% ; the intention to revisit is 80. 86%. The topthree tourist satisfaction scores for suburban parks were plant quantity, plant species and biodiversity.The aspects in urgent need of improvement in the park are indicator signs, rest facilities, plant hierarchy.etc. By improving the management system and landscape enhancement, the park can effectively enhancethe sense of happiness and satisfaction of tourists, and provide a scientific basis for the construction andrenovation of plant landscape in the suburban park.
    Simulation Design of Automatic Production Line Training Device Based on TIA Portal
    Ll Zihong
    2023, 39(6):  69.  doi:10.3969/j.issn.1009-0479.2023.06.011
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    Based on YL-335B type $7-200 automatic production line training device, in order to advancewith the times and convenient teaching, using S7-1500 PLC, PLCSIM, 'TlA Portal and other software andhardware, a set of new simulation system is built. This paper proposes a kind of simulation teachingwhich is easy to realize project-driven and task implementation, and does not rely on specific equipmentwhen necessary. By issuing project assignment , students are investigated from program development andsimulation debugging operation , so as to improve students’ logical thinking and programming ability , andcomprehensively apply the knowledge learned to analyze and deal with practical problems in the engineer-ing field under complex environment , which improve the students’ cognition and adaptability to industrialautomation control. In addition, this paper can also provide some reference for the programming and de.bugging of the electromechanical integration project in the National Vocational College Skills Competition.
    Analysis of Social Needs for Technical and Skilled Talents in the Upgrading of Surveying and Mapping Industry
    LIU Cong, JIANG Xiaochuan, YANG Kejing, LONG Xiaobo, LU Yifan, ZHAO Yafang
    2023, 39(6):  78.  doi:10.3969/j.issn.1009-0479.2023.06.012
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     Intelligent surveying and mapping is the development direction for the transformation and upgrading of the surveying and mapping industry. This article takes empirical analysis as the core methodand uses network big data technology to capture data from mainstream social recruitment websites com-monly used by graduates. lt explores the industrial upgrading characteristics of intelligent surveying andmapping, and further explores the demand structure, professional requirements, and ability requirementsof surveying and mapping talents for industrial upgrading. The aim is to provide reference for the adjust.ment and optimization of major settings and talent cultivation plans, and to improve the adaptability of tal.ent cultivation to social needs. Through analysis, Kunming Metallurgy College's surveying and mappingmajors have a high degree of matching with social needs, and have a good matching with high demandprofessions in surveying and mapping majors across the country. In the context of the upgrading of thesurveying and mapping industry , the college should firmly grasp the development direction, appropriately elevate talent training goals, optimize the construction of the double-qualified teacher team, and makekey breakthroughs in order to cultivate high-quality technical and skilled talents that meet social needs.
    Analysis on Comprehensive Education Mode of Modern Communication Technology Specialty Under the Background of Post Course Competition and Certificate Integration
    SONG Hao, RONG Hui, Ll Wei, LUO Jie, CHEN Yunchuan
    2023, 39(6):  86.  doi:10.3969/j.issn.1009-0479.2023.06.013
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    In order to promote the high-quality development of vocational education and rellect the char.acteristics of vocational education types, on the basis of deepening school-enterprise cooperation and theintegration of industry and education, the content of post ability , curriculum system, vocational skill competition and vocational skill level certificate is integrated into the whole process of talent training. To ex.plore the collaborative education mode with “ multiple subjects” , reform the teaching method with “ combination of specialized thinking" , build a high-level practical training platform with “combination of vir.tuality and reality",construct a curriculum system with “ four-in-one”,innovate the integration mechanism of post, course , competition and certification, optimize the comprehensive education mode, the paper explore a new path to practice training high-quality and highly skilled talents of modern communication technology in higher vocational colleges.

    Research on the Training System of “Double-Qualified” Teachers for Architecture Maiors in Higher Vocational Colleges
    2023, 39(6):  91.  doi:10.3969/j.issn.1009-0479.2023.06.014
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    The state attaches great importance to the training of “ double-qualified” teachers, but thetraining quality of “ double-qualified" teachers for architecture majors in higher vocational colleges is lowat present. In order to improve the training quality of “ double-qualified" teachers for architecture majors ,this paper analyzes the training status of “ double-qualified” teachers for architecture majors, and putsforward corresponding countermeasures. Through analysis, it was found that there are some problems inthe training process of “ double-qualified" teachers for architecture majors, such as without consideringthe teacher source and cultivating them all in one way and lack of hierarchical and passive training ac-cording to the teacher development stage, which lead to low training quality. In view of this, this paperputs forward the following countermeasures : firstly establish a classified training model for teachers from enterprises and universities; secondly train teachers at different levels according to their developmenlstage, and establish a training system of primary, intermediate and senior levels to meet the trainingneeds of teachers at different development stages; thirdly strengthen the analysis of teachers’needs, su.pervision and support of the training process, so that teachers can turn passive into active and actively participate in the training. It is hoped that through the construction of the “two types and three levels”training system and the supervision and support of the training process , the precision, systematicness andinitiative of the training of “ double-qualified" teachers for architecture majors in higher vocational colle-ges can be improved, and the reference can be provided for improving the training quality of “ double.qualifed” teachers for architecture majors.
    Exploration of Mechanical Drawing Teaching in Higher Vocational Colleges
    TONG Shuqi
    2023, 39(6):  96.  doi:10.3969/j.issn.1009-0479.2023.06.015
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    In response to the teaching characteristics of vocational colleges, a preliminary exploration andresearch have been conducted on the reform of the teaching content and methods of the course MechanicaDrawing. The selection of traditional drawing teaching content should be pruned and strengthened, stri.ving for novelty and refinement , and following the prineiple of “enough to use is sufficient”. Solid Edge,CAXA two-dimensional electronic board software, ete. were selected for solid modeling and two-dimen.sional graphics drawing, giving full play to the performance advantages of various software. The two-dimensional drawing software replaced the traditional blackboard drawing, and the three-dimensional draw-ing software replaced the traditional physical model. Online teaching and remote teaching were successfully realized, and more abundant teaching content was added with fewer class hours , effectively impro.ving the teaching quality. The class is an extremely important battlefield for ideological and political edu.cation. In response to the requirements of national ideological and political work throughout the entireprocess of education and teaching, and to achieve the goal of cultivating morality and cultivating talents ,based on the teaching content of the course, we will explore the ideological and political aspects of the Course.
    Reflection and Discussion on Optimizing the Assesment Systemin Universities in the Context of New Engineering
    Ll Kun, SUN He , HU Wenjing, Jl Haobo, Ll Jianfang
    2023, 39(6):  101.  doi:10.3969/j.issn.1009-0479.2023.06.016
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    food biochemistry, as a basic course in food related majors in colleges and universities, bearsimportant responsibility for talent training. How to reform and innovate the assessment method of the sub-ject basic course with the requirement of “new engineering" construction as the goal is the problem wehave to face and solve. In view of the teaching characteristics of Food Biochemistry, this paper analyzesthe drawbacks of the current assessment system in view of the shortcomings of course construction in recent years and the requirements of major construction under the background of new engineering, exploresthe reform and suggestions of the assessment mode of this course reasonably and systematically, and alsomakes a targeted discussion on the assessment methods of carrying out experimental courses to provide atheoretical reference for the reform and innovation of the examination method in the background of “ newengineering