Through analyzing development background and experience of butterfly theme tourism, this paper introduced basic concept, characteristics, significance, guiding ideology, principle and feasibility of butterfly theme pa...Through analyzing development background and experience of butterfly theme tourism, this paper introduced basic concept, characteristics, significance, guiding ideology, principle and feasibility of butterfly theme park, as well as basic pattern and anticipative objectives of the butterfly theme park construction.展开更多
A new method for constructing digital-strain-field-image from a moire pattern with the help of digital image processing technique is proposed in this paper. The digital-strain-field-image expresses the strain values d...A new method for constructing digital-strain-field-image from a moire pattern with the help of digital image processing technique is proposed in this paper. The digital-strain-field-image expresses the strain values directly by its grey levels. The digital-strain-field-image can be obtained by making a differentiation for the digital moire pattern and doing a simple division operation. This image not only gives the visual strain field distribution, but also gives the strain values of every point. This method is simple and applicable and has satisfactory accuracy.展开更多
The concept of grammar refers to a kind of special view of grammar, which directly affects the specific content of representation in grammar teaching. The different influence of various grammatical concepts on grammar...The concept of grammar refers to a kind of special view of grammar, which directly affects the specific content of representation in grammar teaching. The different influence of various grammatical concepts on grammar teaching in history is often triggered by their actual fluency and accuracy factors, thus to cognize the grammatical structure under the grammatical concept model. In the process of cognition of grammatical concepts, this paper points out its new development thinking and explores it from the root development of grammatical concepts. Pursue the root cause of the problem development in the fluency assurance process, using the basic direction as the starting point. Through the flexible use of verbs, determine their variable meaning. In the process of understanding the category of mechanism, it is fully explained.展开更多
The construction of an ecological security pattern(ESP)is an effective approach to addressing ecological concerns in urban agglomerations.However,previous research has often overlooked the ecological characteristics a...The construction of an ecological security pattern(ESP)is an effective approach to addressing ecological concerns in urban agglomerations.However,previous research has often overlooked the ecological characteristics at different spatial scales,making it difficult to effectively tackle environmental issues.This study focuses on the Changsha–Zhuzhou–Xiangtan urban agglomeration(CZXUA)to construct an ESP from 2 scales:the urban agglomeration and the metropolitan area.First,ecological sources at different scales were identified and optimized using morphological spatial pattern analysis,ecosystem service supply assessment,landscape connectivity evaluation,and ecological demand intensity analysis.Next,spatial principal component analysis was employed to analyze resistance factors across different spatial scales,enabling the construction of a multi-scale landscape resistance surface.Finally,multi-scale ecological corridors were extracted using circuit theory,and the ecological corridors passing through the central urban area were optimized.As a result,176 ecological sources,337 ecological corridors,60 ecological pinch points,and 30 ecological barrier points were identified,forming the overall ESP for the CZXUA.Furthermore,an ecological protection and optimization pattern,described as“One River,Seven Waters,One Heart,and Eight Wedges”,was proposed based on the ESP.This pattern highlights pivotal areas for ecological protection and restoration within the national land space.This study provides a comprehensive example of constructing a multi-scale ecological corridor network and identifying critical areas for ecological protection and restoration.The findings can serve as a reference for special ecological protection planning in urban agglomerations.展开更多
In recent years,there has been an increasing demand to improve cellular communication services in several aspects.The aspect that received the most attention is improving the quality of coverage through using smart an...In recent years,there has been an increasing demand to improve cellular communication services in several aspects.The aspect that received the most attention is improving the quality of coverage through using smart antennas which consist of array antennas.this paper investigates the main characteristics and design of the three types of array antennas of the base station for better coverage through simulation(MATLAB)which provides field and strength patterns measured in polar and rectangular coordinates for a variety of conditions including broadsides,ordinary End-fire,and increasing directivity End-fire which is typically used in smart antennas.The method of analysis was applied to twenty experiments of process design to each antenna type separately,so sixty results were obtained from the radiation pattern indicating the parameters for each radiation pattern.Moreover,nineteen design experiments were described in this section.It is hoped that the results obtained from this study will help engineers solve coverage problems as well as improve the quality of cellular communication networks.展开更多
基金Sponsored by 2014 Central Government Financial Program of Wildlife Conservation and Nature Reserve Division,State Forestry Bureau(2130211-2-1-000)Demonstration Project of Forestry Science and Technology Promotion of Central Government Financial Program(2012XT04)
文摘Through analyzing development background and experience of butterfly theme tourism, this paper introduced basic concept, characteristics, significance, guiding ideology, principle and feasibility of butterfly theme park, as well as basic pattern and anticipative objectives of the butterfly theme park construction.
文摘A new method for constructing digital-strain-field-image from a moire pattern with the help of digital image processing technique is proposed in this paper. The digital-strain-field-image expresses the strain values directly by its grey levels. The digital-strain-field-image can be obtained by making a differentiation for the digital moire pattern and doing a simple division operation. This image not only gives the visual strain field distribution, but also gives the strain values of every point. This method is simple and applicable and has satisfactory accuracy.
文摘The concept of grammar refers to a kind of special view of grammar, which directly affects the specific content of representation in grammar teaching. The different influence of various grammatical concepts on grammar teaching in history is often triggered by their actual fluency and accuracy factors, thus to cognize the grammatical structure under the grammatical concept model. In the process of cognition of grammatical concepts, this paper points out its new development thinking and explores it from the root development of grammatical concepts. Pursue the root cause of the problem development in the fluency assurance process, using the basic direction as the starting point. Through the flexible use of verbs, determine their variable meaning. In the process of understanding the category of mechanism, it is fully explained.
基金supported by Hunan Provincial Natural Science Foundation General Project,grant number 2023JJ306932023 Central South University Education and Teaching Reform Research Project,grant number 2023jy045-3Hunan Provincial Key Laboratory of Low Carbon Healthy Building
文摘The construction of an ecological security pattern(ESP)is an effective approach to addressing ecological concerns in urban agglomerations.However,previous research has often overlooked the ecological characteristics at different spatial scales,making it difficult to effectively tackle environmental issues.This study focuses on the Changsha–Zhuzhou–Xiangtan urban agglomeration(CZXUA)to construct an ESP from 2 scales:the urban agglomeration and the metropolitan area.First,ecological sources at different scales were identified and optimized using morphological spatial pattern analysis,ecosystem service supply assessment,landscape connectivity evaluation,and ecological demand intensity analysis.Next,spatial principal component analysis was employed to analyze resistance factors across different spatial scales,enabling the construction of a multi-scale landscape resistance surface.Finally,multi-scale ecological corridors were extracted using circuit theory,and the ecological corridors passing through the central urban area were optimized.As a result,176 ecological sources,337 ecological corridors,60 ecological pinch points,and 30 ecological barrier points were identified,forming the overall ESP for the CZXUA.Furthermore,an ecological protection and optimization pattern,described as“One River,Seven Waters,One Heart,and Eight Wedges”,was proposed based on the ESP.This pattern highlights pivotal areas for ecological protection and restoration within the national land space.This study provides a comprehensive example of constructing a multi-scale ecological corridor network and identifying critical areas for ecological protection and restoration.The findings can serve as a reference for special ecological protection planning in urban agglomerations.
基金The authors extend their appreciation to the Deanship of Scientific Research at King Khalid University for funding this work under Grant Number(RGP 2/25/42),Received by Fahd N.Al-Wesabi.www.kku.edu.sa.
文摘In recent years,there has been an increasing demand to improve cellular communication services in several aspects.The aspect that received the most attention is improving the quality of coverage through using smart antennas which consist of array antennas.this paper investigates the main characteristics and design of the three types of array antennas of the base station for better coverage through simulation(MATLAB)which provides field and strength patterns measured in polar and rectangular coordinates for a variety of conditions including broadsides,ordinary End-fire,and increasing directivity End-fire which is typically used in smart antennas.The method of analysis was applied to twenty experiments of process design to each antenna type separately,so sixty results were obtained from the radiation pattern indicating the parameters for each radiation pattern.Moreover,nineteen design experiments were described in this section.It is hoped that the results obtained from this study will help engineers solve coverage problems as well as improve the quality of cellular communication networks.
