In the digital economy era,many manufacturing enterprises are leveraging digital service enterprises to enhance their digital innovation processes.This paper introduces the concept of“digital innovation network embed...In the digital economy era,many manufacturing enterprises are leveraging digital service enterprises to enhance their digital innovation processes.This paper introduces the concept of“digital innovation network embeddedness”to describe this trend.Unlike traditional strategic resources,which are constrained by high-value,relatively static,restricted flow,and exclusivity,digital resources demonstrate superior fluidity,non-rivalrous access,and high value-driven interdependencies.To bridge this theoretical gap,this study examines the distinctive attributes of digital resources through the dual lenses of resource orchestration theory and dynamic capability theory.Specifically,it proposes big data capability as a mediating mechanism and organizational structure flexibility as a critical moderating factor.Developing this integrated research framework aims to elucidate the underlying mechanisms through which digital innovation network embeddedness dynamically shapes new product development(NPD)performance.Ultimately,this study seeks to advance theoretical understanding and provide actionable insights for digitally empowered manufacturing enterprises to enhance their NPD outcomes.The framework is tested using data from 559 manufacturing enterprises located in South China.There are three findings.(1)An inverted U-shaped relationship exists between digital innovation network structure and NPD performance,and between relationship embeddedness and NPD performance,respectively.(2)Big data capability mediates the relationship between moderate levels of digital innovation network embeddedness and NPD performance.However,at high levels of digital innovation network embeddedness,big data capability does not significantly mediate the relationship between digital innovation network structure/relationship embeddedness and NPD performance,respectively.(3)Organizational structure flexibility positively moderates the relationship between digital innovation network relationship embeddedness,big data capability,and NPD performance.Moreover,while mediated moderation occurred,the direct moderation effect on digital innovation network embeddedness is nonsignificant.The conclusions of this study provide insights for manufacturing enterprises seeking to enhance NPD performance within the context of digital innovation network embeddedness.展开更多
In rural China,the trend of population aging and family hollowing is becoming increasingly severe.Traditional elderly care methods are no longer adequate to meet the growing demand for elderly care,leading to the emer...In rural China,the trend of population aging and family hollowing is becoming increasingly severe.Traditional elderly care methods are no longer adequate to meet the growing demand for elderly care,leading to the emergence of mutual-support elderly care as a new approach to elderly care.Mutual support has gained widespread practice and has become a vital component of the rural elderly service system.However,rural mutual-support elderly care encounters development bottlenecks,including local cultural resilience,disembedding of social relationships,gaps in policies and regulations,and multiple coordination challenges.Embeddedness theory emphasizes the need for social behavior to be embedded in the network of social connections,providing a valuable theoretical framework for mutual-support elderly care.Drawing on embeddedness theory,this paper investigates the accessibility of mutual-support elderly care in rural areas by examining cognitive embeddedness,relational embeddedness,systemic embeddedness,and structural embeddedness.By addressing the development bottlenecks of mutual-support elderly care in rural China,this paper aims to propose ideas for achieving high-quality development in rural mutual-support elderly care.展开更多
Although human beings have come to understand and utilize coal for a very long history, no theoretical breakthrough in the study of coal structure has been made, which still needs continuous efforts of coal chemical w...Although human beings have come to understand and utilize coal for a very long history, no theoretical breakthrough in the study of coal structure has been made, which still needs continuous efforts of coal chemical workers. Based on the viewpoint of ‘vague/clear', the species classification and accurate analysis on coal were conducted by using the natural clustering all-component separation method. A more systematic and detailed coal embedded structure model theory which is suitable for coal of all ranks was developed from the previous one and a more complete theoretical system about the component and structure of coal was constructed. The whole establishment process of the theory was summarized and some of the main support data and analysis test results, including TEM, AFM, FTIR, GC/MS, MALDI/TOF/MS, DART/MSD, fractal analysis and so on were provided. The coal embedded structure theory fully considers both the identity and the particularity of all-rank coal, reflects the coal component and structure in the full range of coal rank, solves the systematic cognitive problem of coal component and structure on macro and micro level, and provides a valuable and meaningful theoretical approach for the coal processing and conversion technology.展开更多
Blue luminescence at about 431nm is obtained from epitaxial silicon after C+ implantation,annealing in hydrogen ambience and chemical etching sequentially.With increase of chemical etching,the blue peak is enhanced at...Blue luminescence at about 431nm is obtained from epitaxial silicon after C+ implantation,annealing in hydrogen ambience and chemical etching sequentially.With increase of chemical etching,the blue peak is enhanced at first,then decreased and substituted by a red peak at last.C=O compounds are introduced during C+ implantation and embedded in the surface of nanometer Si formed during annealing,and at last is formed nanometer silicon with embedded structure,which contributes to the blue emission.Presented is the possible mechanism of photoluminescence.展开更多
Based on the efficient sound absorption characteristics of Helmholtz resonance structures in the range of medium and low frequency acoustic waves,this paper investigates an effective solution for light timber construc...Based on the efficient sound absorption characteristics of Helmholtz resonance structures in the range of medium and low frequency acoustic waves,this paper investigates an effective solution for light timber construction walls with acoustic problems.This study takes the light timber construction wall structure as the research object.Based on the Helmholtz resonance principle,the structure design of the wall unit,impedance tube experiment and COMSOL MULTIPHYSICS simulation calculation were carried out to obtain the change rule of acoustic performance of the Helmholtz resonance wall unit structure.The research results show that the overall stability of sound insulation of the structure is improved,and the frequency range with sound transmission loss more than 50 dB in the experimental group is 640–1600 Hz,while in the control group is 500–906 Hz and 1238–1600 Hz;the sound absorption performance of the structure is obviously better than that of the ordinary structure,especially in the low frequency acoustic wave range of 100–320 Hz,the sound absorption coefficient of the experimental group is more than 0.49,while the sound absorption coefficient of the control group is less than 0.1.It is expected that these results will contribute to the optimization of the acoustic performance of light timber construction walls and have high application and popularization value.展开更多
Blue luminescence at about 431 nm is obtained from epitaxial silicon after C^+ implantation,annealing in hydrogen ambience and chemical etching sequentially.When annealed in nitrogen ambience and etched accordingly,th...Blue luminescence at about 431 nm is obtained from epitaxial silicon after C^+ implantation,annealing in hydrogen ambience and chemical etching sequentially.When annealed in nitrogen ambience and etched accordingly,there is a much narrower peak at about 430 nm.During C^+ implantation,C=O compounds are introduced into and embedded in the surface of nanometer Si formed during annealing,at last,nanometer silicon with embedded structure is formed,which contributes to the blue emission.展开更多
The seismic response of a large wastewater collector box-type is performed by spectral analysis and direct time integration methods. The influence of mechanical characteristics of surrounding soil on structure seismic...The seismic response of a large wastewater collector box-type is performed by spectral analysis and direct time integration methods. The influence of mechanical characteristics of surrounding soil on structure seismic response is investigated. For this purpose the soil bulk modulus was successively considered 40,000 kPa and 80,000 kPa. The study points out the kinematic interaction soil-buried structure is usually more important than inertial interaction. Over wastewater collector is placed a river channel with 2.30 m deep water. The analysis shown the water from river channel led to significant increase in structure sectional stresses during seismic action.展开更多
In order to solve the problem that the embedded software has the shortcoming of the platform dependence, this paper presents an embedded software analysis method based on the static structure model. Before control flo...In order to solve the problem that the embedded software has the shortcoming of the platform dependence, this paper presents an embedded software analysis method based on the static structure model. Before control flow and data flow analysis, a lexical analysis/syntax analysis method with simplified grammar and sentence depth is designed to analyze the embedded software. The experiments use the open source code of smart meters as a case, and the artificial faults as the test objects, repeating 30 times. Compared with the popular static analyzing tools PC-Lint and Splint, the method can accurately orient 91% faults, which is between PC-Lint＇s 95% and Splint＇s 85%. The result indicates that the correct rate of our method is acceptable. Meanwhile, by removing the platform-dependent operation with simplified syntax analysis, our method is independent of development environment. It also shows that the method is applicable to the compiled C（including embedded software） program.展开更多
Supported metal catalysts have important industrial applications such as energy storage/conversion,sustainable production of fuels and chemicals.However,the tendency of metal nanoparticles to grow into larger particle...Supported metal catalysts have important industrial applications such as energy storage/conversion,sustainable production of fuels and chemicals.However,the tendency of metal nanoparticles to grow into larger particles is an impediment for stable or excellent performance.Currently,there remains the formidable challenge of preparing supported metal catalysts that possess both high catalytic activity and stability.Herein,a novel supported Ru catalyst(Ru-Al_(2)O_(3)@CN-A) with a special structure where single Ru atoms and Ru nanoparticles embedded into N-doped carbon layer is successfully fabricated via a coating-impregnation-pyrolysis-etching(CIPE) strategy.Due to the synergy effect of H atoms generated at Ru single sites that migrate to the quinoline-bounded Ru nanoparticles to complete hydrogenation process,the Ru-Al_(2)O_(3)@CN-A catalyst gives a turnover frequency(TOF) of 4216 h^(-1) for the selective hydrogenation of quinoline at 120℃ and 2 MPa H_(2),which,to the best of our knowledge,is superior to most of reported noble metal-based catalysts.Furthermore,benefitting from the special structure that Ru species embedded into N-doped carbon layer,the Ru-Al_(2)O_(3)@CN-A catalyst demonstrates both high catalytic stability and thermal stability,and can be reused at least 10 cycles without activity loss,which is far more stable than commercial Ru/C catalyst with a traditional structure that Ru species dispersed on support surface.We anticipate that our approach paves the way towards the design of supported metal catalyst with both high catalytic activity and stability applied in energy storage/conversion,sustainable production of fuels and chemicals fields.展开更多
In recent years, geometry-based image and video processing methods have aroused significant interest. This paper considers progress from four aspects： geometric characteristics and shape, geometric transformations, e...In recent years, geometry-based image and video processing methods have aroused significant interest. This paper considers progress from four aspects： geometric characteristics and shape, geometric transformations, embedded geometric structure, and differential geometry methods. Current research trends are also pointed out.展开更多
基金supported by the Post-Funded Project of the National Social Science Fund of China(No.23FGLB088)the General Project of the National Natural Science Foundation of China(No.71974059)+2 种基金the Ministry of Education in China Liberal Arts and Social Sciences Foundation(No.23YJA630124)the Development of Philosophy and Social Sciences in Guangzhou in 2021(No.2021GZYB12)the Guangdong Basic and Applied Basic Research Foundation(No.2024A1515030110).
文摘In the digital economy era,many manufacturing enterprises are leveraging digital service enterprises to enhance their digital innovation processes.This paper introduces the concept of“digital innovation network embeddedness”to describe this trend.Unlike traditional strategic resources,which are constrained by high-value,relatively static,restricted flow,and exclusivity,digital resources demonstrate superior fluidity,non-rivalrous access,and high value-driven interdependencies.To bridge this theoretical gap,this study examines the distinctive attributes of digital resources through the dual lenses of resource orchestration theory and dynamic capability theory.Specifically,it proposes big data capability as a mediating mechanism and organizational structure flexibility as a critical moderating factor.Developing this integrated research framework aims to elucidate the underlying mechanisms through which digital innovation network embeddedness dynamically shapes new product development(NPD)performance.Ultimately,this study seeks to advance theoretical understanding and provide actionable insights for digitally empowered manufacturing enterprises to enhance their NPD outcomes.The framework is tested using data from 559 manufacturing enterprises located in South China.There are three findings.(1)An inverted U-shaped relationship exists between digital innovation network structure and NPD performance,and between relationship embeddedness and NPD performance,respectively.(2)Big data capability mediates the relationship between moderate levels of digital innovation network embeddedness and NPD performance.However,at high levels of digital innovation network embeddedness,big data capability does not significantly mediate the relationship between digital innovation network structure/relationship embeddedness and NPD performance,respectively.(3)Organizational structure flexibility positively moderates the relationship between digital innovation network relationship embeddedness,big data capability,and NPD performance.Moreover,while mediated moderation occurred,the direct moderation effect on digital innovation network embeddedness is nonsignificant.The conclusions of this study provide insights for manufacturing enterprises seeking to enhance NPD performance within the context of digital innovation network embeddedness.
基金supported by the General Project of National Social Sciences Fund of China (No.20BZZ042)Heilongjiang Province Philosophy and Social Science Research Program (No.23RKD136)。
文摘In rural China,the trend of population aging and family hollowing is becoming increasingly severe.Traditional elderly care methods are no longer adequate to meet the growing demand for elderly care,leading to the emergence of mutual-support elderly care as a new approach to elderly care.Mutual support has gained widespread practice and has become a vital component of the rural elderly service system.However,rural mutual-support elderly care encounters development bottlenecks,including local cultural resilience,disembedding of social relationships,gaps in policies and regulations,and multiple coordination challenges.Embeddedness theory emphasizes the need for social behavior to be embedded in the network of social connections,providing a valuable theoretical framework for mutual-support elderly care.Drawing on embeddedness theory,this paper investigates the accessibility of mutual-support elderly care in rural areas by examining cognitive embeddedness,relational embeddedness,systemic embeddedness,and structural embeddedness.By addressing the development bottlenecks of mutual-support elderly care in rural China,this paper aims to propose ideas for achieving high-quality development in rural mutual-support elderly care.
基金financial provided by the National Natural Science Foundation of China (Nos. 50474066, 50874108, 51274201, and 51674260)the Coal Joint Fund from National Natural Science Foundation of China and Shenhua Group Corporation Limited (No. U1361116)the National Basic Research Program of China (No. 2012CB214900)
文摘Although human beings have come to understand and utilize coal for a very long history, no theoretical breakthrough in the study of coal structure has been made, which still needs continuous efforts of coal chemical workers. Based on the viewpoint of ‘vague/clear', the species classification and accurate analysis on coal were conducted by using the natural clustering all-component separation method. A more systematic and detailed coal embedded structure model theory which is suitable for coal of all ranks was developed from the previous one and a more complete theoretical system about the component and structure of coal was constructed. The whole establishment process of the theory was summarized and some of the main support data and analysis test results, including TEM, AFM, FTIR, GC/MS, MALDI/TOF/MS, DART/MSD, fractal analysis and so on were provided. The coal embedded structure theory fully considers both the identity and the particularity of all-rank coal, reflects the coal component and structure in the full range of coal rank, solves the systematic cognitive problem of coal component and structure on macro and micro level, and provides a valuable and meaningful theoretical approach for the coal processing and conversion technology.
文摘Blue luminescence at about 431nm is obtained from epitaxial silicon after C+ implantation,annealing in hydrogen ambience and chemical etching sequentially.With increase of chemical etching,the blue peak is enhanced at first,then decreased and substituted by a red peak at last.C=O compounds are introduced during C+ implantation and embedded in the surface of nanometer Si formed during annealing,and at last is formed nanometer silicon with embedded structure,which contributes to the blue emission.Presented is the possible mechanism of photoluminescence.
文摘Based on the efficient sound absorption characteristics of Helmholtz resonance structures in the range of medium and low frequency acoustic waves,this paper investigates an effective solution for light timber construction walls with acoustic problems.This study takes the light timber construction wall structure as the research object.Based on the Helmholtz resonance principle,the structure design of the wall unit,impedance tube experiment and COMSOL MULTIPHYSICS simulation calculation were carried out to obtain the change rule of acoustic performance of the Helmholtz resonance wall unit structure.The research results show that the overall stability of sound insulation of the structure is improved,and the frequency range with sound transmission loss more than 50 dB in the experimental group is 640–1600 Hz,while in the control group is 500–906 Hz and 1238–1600 Hz;the sound absorption performance of the structure is obviously better than that of the ordinary structure,especially in the low frequency acoustic wave range of 100–320 Hz,the sound absorption coefficient of the experimental group is more than 0.49,while the sound absorption coefficient of the control group is less than 0.1.It is expected that these results will contribute to the optimization of the acoustic performance of light timber construction walls and have high application and popularization value.
文摘Blue luminescence at about 431 nm is obtained from epitaxial silicon after C^+ implantation,annealing in hydrogen ambience and chemical etching sequentially.When annealed in nitrogen ambience and etched accordingly,there is a much narrower peak at about 430 nm.During C^+ implantation,C=O compounds are introduced into and embedded in the surface of nanometer Si formed during annealing,at last,nanometer silicon with embedded structure is formed,which contributes to the blue emission.
文摘The seismic response of a large wastewater collector box-type is performed by spectral analysis and direct time integration methods. The influence of mechanical characteristics of surrounding soil on structure seismic response is investigated. For this purpose the soil bulk modulus was successively considered 40,000 kPa and 80,000 kPa. The study points out the kinematic interaction soil-buried structure is usually more important than inertial interaction. Over wastewater collector is placed a river channel with 2.30 m deep water. The analysis shown the water from river channel led to significant increase in structure sectional stresses during seismic action.
基金Supported by the National Natural Science Foundation of China(61303214)the Science and Technology Project of China State Grid Corp(KJ15-1-32)
文摘In order to solve the problem that the embedded software has the shortcoming of the platform dependence, this paper presents an embedded software analysis method based on the static structure model. Before control flow and data flow analysis, a lexical analysis/syntax analysis method with simplified grammar and sentence depth is designed to analyze the embedded software. The experiments use the open source code of smart meters as a case, and the artificial faults as the test objects, repeating 30 times. Compared with the popular static analyzing tools PC-Lint and Splint, the method can accurately orient 91% faults, which is between PC-Lint＇s 95% and Splint＇s 85%. The result indicates that the correct rate of our method is acceptable. Meanwhile, by removing the platform-dependent operation with simplified syntax analysis, our method is independent of development environment. It also shows that the method is applicable to the compiled C（including embedded software） program.
基金supported by the National Natural Science Foundation of China (22002120)the Key Research and Development Program of Shaanxi (2023-YBGY-322)the Young Star of Science and Technology in Shaanxi Province (2024ZC-KJXX-088)。
文摘Supported metal catalysts have important industrial applications such as energy storage/conversion,sustainable production of fuels and chemicals.However,the tendency of metal nanoparticles to grow into larger particles is an impediment for stable or excellent performance.Currently,there remains the formidable challenge of preparing supported metal catalysts that possess both high catalytic activity and stability.Herein,a novel supported Ru catalyst(Ru-Al_(2)O_(3)@CN-A) with a special structure where single Ru atoms and Ru nanoparticles embedded into N-doped carbon layer is successfully fabricated via a coating-impregnation-pyrolysis-etching(CIPE) strategy.Due to the synergy effect of H atoms generated at Ru single sites that migrate to the quinoline-bounded Ru nanoparticles to complete hydrogenation process,the Ru-Al_(2)O_(3)@CN-A catalyst gives a turnover frequency(TOF) of 4216 h^(-1) for the selective hydrogenation of quinoline at 120℃ and 2 MPa H_(2),which,to the best of our knowledge,is superior to most of reported noble metal-based catalysts.Furthermore,benefitting from the special structure that Ru species embedded into N-doped carbon layer,the Ru-Al_(2)O_(3)@CN-A catalyst demonstrates both high catalytic stability and thermal stability,and can be reused at least 10 cycles without activity loss,which is far more stable than commercial Ru/C catalyst with a traditional structure that Ru species dispersed on support surface.We anticipate that our approach paves the way towards the design of supported metal catalyst with both high catalytic activity and stability applied in energy storage/conversion,sustainable production of fuels and chemicals fields.
基金Acknowledgements This work was supported by the National Natural Science Foundation of China （Grant Nos. 60970105 and 61272430）.
文摘In recent years, geometry-based image and video processing methods have aroused significant interest. This paper considers progress from four aspects： geometric characteristics and shape, geometric transformations, embedded geometric structure, and differential geometry methods. Current research trends are also pointed out.
