A Situational Awareness Method for Initial Insulation Fault of Distribution Network Based on Multi-Feature Index Comprehensive Evaluation

Most ground faults in distribution network are caused by insulation deterioration of power equipment.It is difficult to find the insulation deterioration of the distribution network in time,and the development trend of the initial insulation fault is unknown,which brings difficulties to the distribution inspection.In order to solve the above problems,a situational awareness method of the initial insulation fault of the distribution network based on a multi-feature index comprehensive evaluation is proposed.Firstly,the insulation situation evaluation index is selected by analyzing the insulation fault mechanism of the distribution network,and the relational database of the distribution network is designed based on the data and numerical characteristics of the existing distribution management system.Secondly,considering all kinds of fault factors of the distribution network and the influence of the power supply region,the evaluation method of the initial insulation fault situation of the distribution network is proposed,and the development situation of the distribution network insulation fault is classified according to the evaluation method.Then,principal component analysis was used to reduce the dimension of the training samples and test samples of the distribution network data,and the support vector machine(SVM)was trained.The optimal parameter combination of the SVM model was found by the grid search method,and a multi-class SVM model based on 1-v-1 method was constructed.Finally,the trained multi-class SVM was used to predict 6 kinds of situation level prediction samples.The results of simulation examples show that the average prediction accuracy of 6 situation levels is above 95%,and the perception accuracy of 4 situation levels is above 96%.In addition,the insulation maintenance decision scheme under different situation levels is able to be given when no fault occurs or the insulation fault is in the early stage,which can meet the needs of power distribution and inspection for accurately sensing the insulation fault situation.The correctness and effectiveness of this method are verified.

Current status and prospects of research on safety situation awareness of high speed railway operation environment

Purpose–The safety of high-speed rail operation environments is an important guarantee for the safe operation of high-speed rail.The operating environment of the high-speed rail is complex,and the main factors affecting the safety of high-speed rail operating environment include meteorological disasters,perimeter intrusion and external environmental hazards.The purpose of the paper is to elaborate on the current research status and team research progress on the perception of safety situation in high-speed rail operation environment and to propose directions for further research in the future.Design/methodology/approach–In terms of the mechanism and spatio-temporal evolution law of the main influencing factors on the safety of high-speed rail operation environments,the research status is elaborated,and the latest research progress and achievements of the team are introduced.This paper elaborates on the research status and introduces the latest research progress and achievements of the team in terms of meteorological,perimeter and external environmental situation perception methods for high-speed rail operation.Findings–Based on the technical route of“situational awareness evaluation warning active control,”a technical system for monitoring the safety of high-speed train operation environments has been formed.Relevant theoretical and technical research and application have been carried out around the impact of meteorological disasters,perimeter intrusion and the external environment on high-speed rail safety.These works strongly support the improvement of China’s railway environmental safety guarantee technology.Originality/value–With the operation of CR450 high-speed trains with a speed of 400 kmper hour and the application of high-speed train autonomous driving technology in the future,new and higher requirements have been put forward for the safety of high-speed rail operation environments.The following five aspects of work are urgently needed:(1)Research the single factor disaster mechanism of wind,rain,snow,lightning,etc.for high-speed railways with a speed of 400 kms per hour,and based on this,study the evolution characteristics of multiple safety factors and the correlation between the high-speed driving safety environment,revealing the coupling disastermechanism ofmultiple influencing factors;(2)Research covers multi-source data fusion methods and associated features such as disaster monitoring data,meteorological information,route characteristics and terrain and landforms,studying the spatio-temporal evolution laws of meteorological disasters,perimeter intrusions and external environmental hazards;(3)In terms of meteorological disaster situation awareness,research high-precision prediction methods for meteorological information time series along high-speed rail lines and study the realization of small-scale real-time dynamic and accurate prediction of meteorological disasters along high-speed rail lines;(4)In terms of perimeter intrusion,research amulti-modal fusion perception method for typical scenarios of high-speed rail operation in all time,all weather and all coverage and combine artificial intelligence technology to achieve comprehensive and accurate perception of perimeter security risks along the high-speed rail line and(5)In terms of external environment,based on the existing general network framework for change detection,we will carry out research on change detection and algorithms in the surrounding environment of highspeed rail.

Current Situation and Countermeasures of Household Waste Classification in Feixi County, Hefei City

Feixi County has made significant progress in promoting waste classification,such as establishing a comprehensive classification system,and effectively reducing environmental pollution and waste volume.However,with the increase in waste generation,the county faces multiple challenges especially in the disposal of kitchen waste and improvement of residents environmental awareness.To address these issues,Feixi County has implemented various measures,such as strengthening the construction of infrastructure for waste classification,improving regulations and clearly defining responsibilities,enhancing residents environmental awareness to encourage their participation in waste classification through education and promotion,and increasing supervision to ensure effective implementation of the work.It emphasizes community governance,encourage all parties to participate in it,and strengthen publicity,education and training to enhance residents participation.Feixi County has achieved positive results,but efforts are needed to further improve facilities,raise awareness,enhance supervision,and ensure the continuous effectiveness of waste classification work to promote urban green sustainable development.

Corrigendum:Exploration of the Current Situation and Mechanism Innovation of University Education Management under the New Situation

Correction A funding is added to the original publication(https://doi.org/10.26689/jcer.v8i10.8594).

Ways to Cultivate and Develop Human Resources in the New Situation

In the trend of globalization,digitization,and economic integration,human resources are the core competitiveness of enterprises,and cultivating and developing them is crucial for enhancing competitive advantages.This article delves into how human resource development drives enterprise innovation,promotes team collaboration,and optimizes performance management.Currently,although many enterprises are beginning to attach importance to human resource development,they still face problems such as insufficient investment,weak targeted training,and insufficient exploration of employee potential.Therefore,it is proposed that in the new situation,enterprises need to strengthen diversified training strategies,use digital tools to improve training efficiency,build a fair performance evaluation system,stimulate employee potential,and promote internal talent mobility.The implementation of these strategies will effectively enhance the efficiency of enterprise human resource management and consolidate market position.

Architectural Design and Urban Planning in the New Situation

Under the influence of the world economy,China’s economic development is very rapid,the people’s living standards have been greatly improved,and the urbanization process has been accelerated.As a part of urban planning,architecture plays an important role in urban planning and construction,so urban planning must be combined with the future development goals of the city,develop in an all-round way,strengthen architectural design,ensure the consistency of urban planning and architectural design,and create a good environment for urban development.Therefore,this paper analyzes the relationship between architectural design and urban planning under the new situation,clarifies the relationship between architectural design and urban planning,and strengthens urban construction.

Exploration and Reflection on Promoting Graduate Enrollment under the New Situation

Graduate enrollment is crucial for improving the quality of graduate education and building a high-quality education system.The current enrollment situation in some universities is severe,with problems such as insufficient attention to enrollment promotion and a single mode.To solve these problems,this article proposes measures such as leveraging the joint efforts of schools,formulating enrollment promotion plans at different levels,strengthening the construction of enrollment teams at both the school and college levels,enriching enrollment promotion forms,strengthening the construction of high-quality student sources,and building a quality evaluation system for student sources to attract more students to apply and continuously improve the quality of student sources.

Exploration of the Current Situation and Mechanism Innovation of University Education Management under the New Situation

In the new era,university education management should be oriented toward the cultivation of innovative talents and the construction of a comprehensive education system.It should develop capable and qualified higher-level talents in response to the social demand for talent application,thereby enhancing the overall educational competitiveness of universities and driving deep reforms in educational activities.However,in current educational practice,efficient educational management often focuses on curriculum development and cultural education,with insufficient attention paid to the development of students’comprehensive literacy.The talent cultivation and education programs are not yet perfect.This article explores the current situation of university education management activities under the new situation and considers practical methods for innovating university education management mechanisms.

Research on English Language and Literature Teaching Strategies Based on Situational Teaching Method

The teaching of English language and literature not only focuses on developing students’English language proficiency but also emphasizes their understanding and cognition of the cultural connotations behind the English language.This dual focus aims to cultivate students’cross-cultural communication skills and practical English skills.The application of the situational teaching method can create corresponding learning scenarios based on English language knowledge,thereby enriching students’learning experiences and understanding within these scenarios.This method has significant advantages in enhancing the effectiveness of English language and literature teaching.Consequently,this paper first analyzes the significance of applying the situational teaching method in university-level English language and literature instruction.It then proposes several strategies for implementing this method,with the goal of enhancing students’language awareness,cultural literacy,and comprehensive English skills.

Discussion on Cultural Integration and Educational Services for International Students from the Perspective of Situational Communication

From the perspective of situational communication,this paper aims to explore how to promote cultural integration and provide better educational services for international students in China.This paper first analyzes the basic assumptions and key factors of situational communication based on international students in China.Secondly,the relationship between situational communication and cultural integration and educational services for international students in China is discussed in depth.Additionally,the role of situational communication in educational services for international students in China,such as promoting cross-cultural communication,solving language barriers,and enhancing mutual understanding,is proposed.Lastly,from the perspective of situational communication,an optimization path of educational services and cultural integration for international students in China is proposed,including the provision of diversified educational resources,the enhancement of cross-cultural communication,and the establishment of an effective communication mechanism.This study expands the perspective of educational services for international students in China,provides a new theoretical framework and practical path,and offers a reference for promoting cultural integration and improving educational services for international students in China.

Current Situation and Countermeasures of the Construction of “Double-Qualified” Teachers in Higher Vocational Colleges

The construction of“double-qualified”teachers is the basic premise for the high-quality development of higher vocational education,and it is also the key force for higher vocational colleges to cultivate high-quality skilled talents.This paper probes into the positioning of the construction of“double-qualified”teachers in higher vocational colleges,deeply analyzes the current situation of the construction of“double-qualified”teachers in higher vocational colleges,and provides the countermeasures of the construction of“double-qualified”teachers.

Research on the Current Situation and Countermeasures of Integrating Artificial Intelligence into Ideological and Political Teaching in Universities

With the rapid development of modern science and technology,artificial intelligence(AI)technology is becoming more and more mature,which has brought a profound impact on every field of human society.The new era background provides a new teaching concept for ideological and political teaching in colleges and universities.Teachers in colleges and universities should adopt a positive attitude to face the teaching change brought by new technology,update the teaching ideas in time,and adjust the teaching strategy.This paper will analyze the current situation of the integrated development of AI and ideological and political teaching and put forward corresponding teaching strategies to help train well-developed socialist successors.

Analysis of the Current Situation of Drug Clinical Trial Institutions in Shaanxi Province

To understand the current situation of institutional registration in Shaanxi Province after the implementation ofregistration system management in drug clinical trial institutions.Relevant information was collected on the“Announcement on the Accreditation of Drug Clinical Trial Institutions”issued by the National Medical Products Administration from 2005 to August 2022,the record management information system of drug and medical device clinical trial institutions,and the drug clinical trial registration and information publicity platform.A retrospective analysis was carried out in terms of institutional development,regional distribution,registered majors,principal investigators,and the number of drug clinical trials.After the implementation of institution registration,the number of drug clinical trial institutions in Shaanxi Province increased by 47.4%,884 principal investigators were registered,the number of registered majors expanded from 58 qualified to 117,and the professional scope increased by 50.4%.The policy of institution registration is conducive to promoting the rational use of medical resources and the development of drug clinical trial institutions and improving the healthy development of the pharmaceutical industry in Shaanxi Province.

Research on the Current Situation of China’s Higher Education Students Studying Abroad in the Context of Higher Education Internationalization

In the context of education internationalization,the internationalization of higher education has become a major trend in the field of education in most countries,with international student education as the core.This phenomenon promotes cultural exchanges and integration among countries as well as higher education reform,which is of great significance in enhancing the international influence of higher education in each country.However,there are also some challenges faced by higher education students when studying abroad.The article digs into the origin and history of studying abroad,analyzes the current situation and reasons for higher education students in China to study abroad,discusses the opportunities and challenges faced by higher education students in China when studying abroad,and analyzes the trend of studying abroad in China.

Research on Current Situation,Symptoms and Protection Technological Measures of Ancient Trees in Surging Waves Pavilion,China

The paper had studied growth situation and disease symptoms of ancient trees in Surging Waves Pavilion.There were 14 ancient trees belonging to 10 genera of 9 families,with tree age of 120-260 years.These trees had been well protected generally.There were 9 ancient trees growing well,occupying 64.29%,which were Ginkgo biloba,Cupressus funebris Endl.,Podocarpus macrophyllus,Zelkova schneideriana Hand.-Mazz,Cinnamomum camphora(L.)Presl,Buxus sinica,and Wisteria sinensis(Sims)Sweet.There were 5 ancient trees needing to be protected preferentially,occupying 35.71%,including Ligustrum lucidum,Osmanthus fragrans and Pterocarya stenoptera.The disease symptoms were trunk rot and hollow structure.Based on these symptoms,the paper had proposed protective measures for Ligustrum lucidum and Osmanthus fragrans:① enclosing eroding holes on the trunk;② clearing up eroded woodiness on the surface of trunk,disinfecting and applying anti-corrosion protectants;③ filling eroded holes of the trunk.Protective measures for Pterocarya stenoptera included:① clearing up the inner part and interior walls;② disinfecting the inside and interior walls of holes;③ applying anti-corrosion protectants.

Present Situation and Promoting Strategies of Maca Industry in Yunnan

Maca is an important health-care product. Recently, maca industry devel- ops fast in Yunnan Province, but still falls behind of foreign industries, due to dis- advantages of being late starter and poor economy. In the research, maca industry development was analyzed in terms of production bases, processing enterprises, dis- tribution in dominant areas, planting and processing technology system, and eco- nomic benefits, and the restriction factors were explored. Finally, some measures were proposed, including reinforcement of organization and leading roles in a macroscopic way, giving supports to financial investment, broadening financing chan- nels, speeding up construction of raw material production bases, improving modern science and technology development, establishing technology support system, culti- vating leading enterprises, building marketing system, and supervision on product eualitv.

The Greening Situation and Developing Countermeasures along the Han River——Taking Chaozhou Downtown Part as an Example

Hanjiang is the main river in Chaozhou. The urban sections on both sides of it are large-scale landscape zones which combine the natural landscape and the cultural landscape. Aiming at better manifesting the geographical features and pro-moting the sustainable development of the ecological environment on both sides of the Hanjiang River, the research, with the reach between the Jinshan River and the Hanjiang River as an example, pointed out the existing problems and put forward some constructive suggestions based on a thorough survey on the plant species and the rationality of plant configuration and the afforstation managements, in order to provide reference for the decision-maker of the further planning and construction of this area.

Current Situation and Development Countermeasures on Grassland Resource in Farming-pasturing Ecotone in West Jilin Province

Upon the current degradation situation of grassland in west Jilin Province,I analyzed the effects of natural factors and human activities on the degradation of grassland,and further purposefully put forward countermeasures on the remediation and development of grassland.As a conclusion,scientifically utilizing and protecting the grassland resources could suppress grassland degradation,promoting the sustainable development of regional economy.

Current Situation,Symptoms and Protective Techniques of Ancient Trees in the Master-of-Nets Garden

Growth conditions,symptoms of ancient trees in the Master-of-Nets Garden were investigated,it was found that there were 6 ancient trees about 120-920 years old in this garden,belonging to 5 genera and 5 families.Generally speaking,ancient trees in this garden grow well due to the proper protection,and 3 of them need only regular management,specifically,Pinus bungeana Zucc.,Podocarpus macrophyllus(Thunb.)D.Don,Wisteria sinensis Sweet in south yard of Dianchun Yi(the Peony Study),while another three need key protection,specifically,Chaenomeles sinensis Koehne,Sabina chinensis(Linn.)Ant.,W.sinensis Sweet,2 of which need corrosion prevention and filling protection,and another one needs comprehensive techniques for the rejuvenation of tree vigor.In view of symptoms of these 3 trees requiring key protection,corresponding techniques were proposed as below:3 steps for protecting C.sinensis Koehne(A.clearing and sterilizing tree holes,painting anti-corrosion protective agent;B.filling holes;C.sealing holes);3 steps for protecting W.sinensis Sweet(A.clearing up rotten xylem;B.anti-corrosion and sterilization processing for trunk;C.painting anti-corrosion agent);4 steps for S.chinensis(Linn.)Ant.(A.clearing climbing plants around it;B.clearing rotten xylem;C.filling holes;D.improving rhizosphere and rejuvenation of the tree).

Analysis of Current Situation and Countermeasures of Plant Landscapes on Tianjin Urban Squares of China

Through the survey of plant landscapes on eight representative squares in Tianjin City,the paper had pointed out that plant landscapes on Tianjin squares were improper in terms of plants richness,cultivation layer and color change.It had suggested selecting regional characteristic tree species,applying salt-tolerant plants,emphasizing the diversity of plants species,highlighting the application of towering arbors,stressing the use of color-leaved plants,and creating abundant plant communities,so as to provide citizens with a more practical and ornamental square landscape environment through improving plant landscapes on squares in Tianjin City.