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  • EDP Sciences  (21)
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  • EDP Sciences  (21)
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  • 1
    Online Resource
    Online Resource
    Monitoring the changes in land use and landscape pattern in recent 20 years: A case study in Wuhan, China
    EDP Sciences ; 2021
    In:  E3S Web of Conferences Vol. 272 ( 2021), p. 01022-
    Details
    In: E3S Web of Conferences, EDP Sciences, Vol. 272 ( 2021), p. 01022-
    Abstract: Based on the land use data of 2000, 2010 and 2020, using GIS technology along with landscape ecology methods, this paper monitored the changes in land use and landscape pattern in Wuhan. The findings are as follows: (1) the main features of land use change in Wuhan were the expansion of urban area and the decline of cropland, forest, wetland and water in recent 20 years; (2) forest, wetland and water kept a transfer-out trend while urban kept a transfer-in trend; (3) the fragmentation degree of forest, grassland and urban landscapes decreased from 2000 to 2020; (4) the patch shapes of almost all landscapes tended to be more regular under the human interventions. It is thereby worth reducing the interference intensity of human activities on landscape pattern in the process of urban growth.
    Type of Medium: Online Resource
    ISSN: 2267-1242
    URL: Article
    DOI: 10.1051/e3sconf/202127201022
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2021
    detail.hit.zdb_id: 2755680-3
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Ethical path for human rights protection in the digital society
    EDP Sciences ; 2023
    In:  SHS Web of Conferences Vol. 157 ( 2023), p. 04006-
    Details
    In: SHS Web of Conferences, EDP Sciences, Vol. 157 ( 2023), p. 04006-
    Abstract: In the digital age, digital survival has become an important part of the basic way of life, and produced a series of digital situation related human rights protection requirements, including equal use of digital technology without discrimination, from the use of digital technology, from the use of digital technology manipulation of people, as well as the personal digital information and property autonomy, etc. In the face of increasingly professional and strong control of digital technology, the digital age of human rights protection not only need the government to establish regulation digital technology development and application of laws and regulations, establish professional relief agencies to regulate data companies and online social platform, provide effective relief to help digital vulnerable groups, and requires the development and use of digital technology and network social platform to strengthen self-discipline, and establish everyone must abide by the digital technology application ethics.
    Type of Medium: Online Resource
    ISSN: 2261-2424
    URL: Article
    DOI: 10.1051/shsconf/202315704006
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2023
    detail.hit.zdb_id: 2755676-1
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  • 3
    Online Resource
    Online Resource
    Analysis on spatial distribution pattern of football fields: A case study in Wuhan, China
    EDP Sciences ; 2021
    In:  E3S Web of Conferences Vol. 293 ( 2021), p. 02051-
    Details
    In: E3S Web of Conferences, EDP Sciences, Vol. 293 ( 2021), p. 02051-
    Abstract: In order to promote the sustainable development of sports facilities, the statistical data of football fields in 13 districts of Wuhan city were selected. Based on geographic information system (GIS) and exploratory spatial data analysis (ESDA) technology, this paper analyzed the global and local autocorrelation of the number of football fields per capita in Wuhan city. The results indicate that: (1) Comparing to the new districts in Wuhan, the number of football fields per capita in the central districts was relatively few. (2) In the global scale, the number of football fields per capita in Wuhan presented a spatial aggregation pattern. (3) In the local scale, the regional discrepancy and spatial clusters were confirmed in the local spatial autocorrelation analysis for football fields in Wuhan. At the same time, the research results could provide reasonable references for the planning of football field facilities.
    Type of Medium: Online Resource
    ISSN: 2267-1242
    URL: Article
    DOI: 10.1051/e3sconf/202129302051
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2021
    detail.hit.zdb_id: 2755680-3
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  • 4
    Online Resource
    Online Resource
    Research on the Extrusion Process of belt with Notch Descrition
    EDP Sciences ; 2022
    In:  MATEC Web of Conferences Vol. 363 ( 2022), p. 01029-
    Details
    In: MATEC Web of Conferences, EDP Sciences, Vol. 363 ( 2022), p. 01029-
    Abstract: The extrusion process of the belt is a process in which the belt and the inner bore of the barrel undergo complex contact and collision, and the rifling gradually penetrates the belt, so that the material of the belt continues to fail and destroy. It has high instantaneous, strong impact, high temperature, high-speed change. There is a big gap between the existing theory and the actual extrusion process, and it is urgent to carry out research work on this problem. This paper analyzes the basic characteristics of elastic and plastic deformation during the extrusion process of the belt, and establishes the Johnson-Cook constitutive model of the deformation, flow and failure process of the belt material. Explicit dynamic calculations are carried out in the process of belt extrusion, and the contact problems, deformation of the belt and material flow problems during the extrusion process of the belt are discussed in depth
    Type of Medium: Online Resource
    ISSN: 2261-236X
    URL: Article
    DOI: 10.1051/matecconf/202236301029
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2022
    detail.hit.zdb_id: 2673602-0
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  • 5
    Online Resource
    Online Resource
    Experimental and Simulation Research on the Quasi-dynamic Extrusion Process of the Belt
    EDP Sciences ; 2022
    In:  MATEC Web of Conferences Vol. 358 ( 2022), p. 01062-
    Details
    In: MATEC Web of Conferences, EDP Sciences, Vol. 358 ( 2022), p. 01062-
    Abstract: The extrusion process of the elastic belt is a process in which the elastic belt and the inner bore of the barrel undergo complex contact and collision, and the rifling gradually penetrates the elastic belt, so that the material of the elastic belt continues to fail and destroy. It has high instantaneous, strong impact, high temperature, high-speed change There is a big gap between the existing theory and the actual squeeze-in process, and it is urgent to carry out research work on this problem. In this paper, a quasi-dynamic test device for the extrusion process of the elastic belt is established. On this basis, the extrusion history of a small-caliber projectile under different belt materials, different extrusion speeds, different extrusion force loading rates and different chamber pressure loading rates is established. The experimental comparison research was carried out. Based on the experimental data, the model calibration was carried out for the simplified chip resistance model of the belt extrusion process, and the calibration model was used to test the extrusion resistance of a newly designed large-caliber and howitzer belt extrusion process. The prediction research is carried out, which provides a reference for the optimal design of internal ballistics and charges, projectiles and barrels, and the coupling design of projectiles, guns and charges in a system.
    Type of Medium: Online Resource
    ISSN: 2261-236X
    URL: Article
    DOI: 10.1051/matecconf/202235801062
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2022
    detail.hit.zdb_id: 2673602-0
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    Online Resource
  • 6
    Online Resource
    Online Resource
    Effect of altitude on the emission characteristics of a DI diesel engine
    EDP Sciences ; 2021
    In:  E3S Web of Conferences Vol. 268 ( 2021), p. 01049-
    Details
    In: E3S Web of Conferences, EDP Sciences, Vol. 268 ( 2021), p. 01049-
    Abstract: To evaluate the effects of altitude on common rail electronic-controlled diesel engine, an experiment was carried out on a test bench with the simulated altitude system. The results indicated that the emissions of CO and Soot increased, while the impact of altitude on NOx varied based on the specific loads and speed when altitude increased from 0m to 4000m. The increment rate of CO and Soot increased with altitude, and the impact of altitude was greater on CO and Soot than those of NOX. The average emissions of CO and Soot increased with altitude, while the average emission NOx first increased at 1000m then decreased with altitude. The average increasing rate of CO ,Soot and NOx was 14.5%~59.5%, 13.4%~25.6% , -5.6%~0.5% respectively.
    Type of Medium: Online Resource
    ISSN: 2267-1242
    URL: Article
    DOI: 10.1051/e3sconf/202126801049
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2021
    detail.hit.zdb_id: 2755680-3
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  • 7
    Online Resource
    Online Resource
    Study on heat transfer and pressure drop characteristics in marine S-CO 2 power cycle hybrid heat exchangers
    EDP Sciences ; 2020
    In:  E3S Web of Conferences Vol. 185 ( 2020), p. 01082-
    Details
    In: E3S Web of Conferences, EDP Sciences, Vol. 185 ( 2020), p. 01082-
    Abstract: The S-CO2 power cycle has the advantages of compact structure and high energy density, which can be used to recover the waste heat of ship exhaust, thus improving the energy efficiency of ships and reducing emissions. The hybrid heat exchangers with etched plates and fins can be used as the heat transfer device of S-CO2 and exhaust, its heat transfer and pressure drop characteristics have a great influence on S- CO2 power cycle performance. In this study, a CFD model of the hybrid heat exchangers was established. The effects of different exhaust inlet temperatures, inlet mass flow rates and inlet pressures on the heat transfer and the pressure drop characteristics were analyzed by Fluent. The results show that the inlet temperatures and inlet mass flow rates of exhaust have a great influence on the heat transfer characteristics of the hybrid heat exchanger. The inlet mass flow rates and inlet pressures of exhaust have a great influence on the pressure drop characteristics of the hybrid heat exchangers. In the design of the hybrid heat exchangers, the status of the exhaust need to be considered to ensure efficient operation of the heat exchangers. The study can provide guidance for the design of the hybrid heat exchangers.
    Type of Medium: Online Resource
    ISSN: 2267-1242
    URL: Article
    DOI: 10.1051/e3sconf/202018501082
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2020
    detail.hit.zdb_id: 2755680-3
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  • 8
    Online Resource
    Online Resource
    Analysis on the difference of DC energy consumption of electric vehicles under repeat cycles
    EDP Sciences ; 2022
    In:  E3S Web of Conferences Vol. 360 ( 2022), p. 01025-
    Details
    In: E3S Web of Conferences, EDP Sciences, Vol. 360 ( 2022), p. 01025-
    Abstract: In order to avoid the problem of too many AC energy consumption cycles and time-consuming for the standard electric vehicle driving range test, the DC energy consumption test can be used to obtain the energy consumption of the test cycle at any time period and estimate the driving range. However, the rationality of intercepting part of the circulating DC energy consumption to estimate the whole process still lacks sufficient experimental support. Therefore, in this paper, two different electric vehicle prototypes were selected, and a complete energy consumption test experiment was carried out according to the standard test process. Through the test of DC energy consumption, the difference characteristics of electric vehicle driving braking energy and energy consumption under repeated cycles were analyzed. The fluctuation range provides data support for the use of DC power to evaluate the energy consumption of electric vehicles
    Type of Medium: Online Resource
    ISSN: 2267-1242
    URL: Article
    DOI: 10.1051/e3sconf/202236001025
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2022
    detail.hit.zdb_id: 2755680-3
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  • 9
    Online Resource
    Online Resource
    Western Constitutionalism and Human Rights Protection: Essence and Enlightenment
    EDP Sciences ; 2023
    In:  SHS Web of Conferences Vol. 158 ( 2023), p. 02020-
    Details
    In: SHS Web of Conferences, EDP Sciences, Vol. 158 ( 2023), p. 02020-
    Abstract: The relationship between human rights and the constitution and the law has long been regarded as the core issue in the field of law. This core element essentially originates from the importance of the two concepts in the legal system and the family similarity in the value connotation between the two concepts. The source of western constitutionalism lies in the realistic demand for human rights recognition, and its value lies in the respect for human rights. The development of western constitutionalism has always been closely related to the core issue of “human rights protection”. The study and the reveal of the essence of the western constitutionalism and human rights protection are helpful to provide reference for the theory and practice of governing the country according to the constitution in China.
    Type of Medium: Online Resource
    ISSN: 2261-2424
    URL: Article
    DOI: 10.1051/shsconf/202315802020
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2023
    detail.hit.zdb_id: 2755676-1
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    Online Resource
  • 10
    Online Resource
    Online Resource
    Enhanced Field Electron Emission from Photocurrent Treated Nanostructured Indium Oxide Films
    EDP Sciences ; 2018
    In:  MATEC Web of Conferences Vol. 228 ( 2018), p. 04003-
    Details
    In: MATEC Web of Conferences, EDP Sciences, Vol. 228 ( 2018), p. 04003-
    Abstract: Field electron emission currents from nanostructured films always have unsatisfied stability. This paper introduces a photocurrent treatment technique to enhance the filed emission properties, and gives a kind of nanostructured indium oxide film suitable for the technique. The products were prepared on patterned ITO glass substrate by using chemical vapor deposition method. With the increase of reaction time, the morphologies of the films changed from cocoonlike particles to hybrid thin films, and finally flowerlike nanostructures were formed. Photocurrent and field electron emission characteristics of the products have been studied. After photocurrent treatment, the flowerlike indium oxide films show stable field emission current (fluctuation is less than 5%), low field emission threshold (at 7.5 V/m, the current density is 1 mA/cm 2 ) and high enhancement factor of electrical field of 778. The field emission test results validated that the photocurrent treated flowerlike indium oxide films may act as electron emitters and applied in display applications.
    Type of Medium: Online Resource
    ISSN: 2261-236X
    URL: Article
    DOI: 10.1051/matecconf/201822804003
    Language: English
    Publisher: EDP Sciences
    Publication Date: 2018
    detail.hit.zdb_id: 2673602-0
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