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Coordination Mechanism and Empirical Research on Marine Science Technology Innovation and Marine Eco-civilization:A Case Study of Coastal Areas of China
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作者 CHEN Xiaolong LIANG Chenlu DI Qianbin 《Chinese Geographical Science》 SCIE CSCD 2024年第3期468-486,共19页
Marine science technology innovation provides power and guarantees for marine eco-civilization construction,which provides direction and material support for marine science technology innovation.Therefore,the coordina... Marine science technology innovation provides power and guarantees for marine eco-civilization construction,which provides direction and material support for marine science technology innovation.Therefore,the coordinated development of the two is of great significance to the marine economy sustainable development in China’s coastal areas.On the basis of clarifying the connotations of marine science technology innovation and marine eco-civilization in China’s coastal areas from 2006 to 2019,the mechanism for their coordinated development was analysed.A comprehensive indicator system based on the connotation of the two was constructed,and the coordinated development relationship was empirically tested using the coupled coordination model and the panel vector autoregressive(PVAR)model.The results show that:1)the level of China’s coastal marine science technology innovation continues to improve,gradually forming the core of the development of marine science technology innovation in the north,east and south of Shandong,Shanghai and Guangdong;the level of marine eco-civilization development fluctuating upward trend,showing obvious spatial differentiation characteristics.2)The degree of coordination of marine science technology innovation and marine eco-civilization is growing over time.There is no causal relationship between marine science technology innovation and marine eco-civilization in the northern marine economic circle,but there is a two-way causal relationship between the two in the eastern and southern marine economic circles.3)Marine eco-civilization shows a significant positive and continuous impact on marine science technology innovation,and marine science technology innovation shows a long-term,continuous,fluctuating,and lagging impact on marine eco-civilization.The overall role of marine eco-civilization on marine science technology innovation is dominant,and there are significant differences in the impact effects of the two major marine economic circles. 展开更多
关键词 marine science technology innovation marine eco-civilization coordinated development coastal areas of China
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The Influence Mechanism of an Inclusive Organizational Climate on Innovation Input of Sci-Tech Talents
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作者 Yang Xiaoyi Zhao Weihong Ma Xiaomeng 《Contemporary Social Sciences》 2024年第2期52-66,共15页
With the implementation of China’s innovation-driven development strategy,the competition among sci-tech talents has become increasingly fierce.Stimulating the innovative vigor of sci-tech talents has become a hot to... With the implementation of China’s innovation-driven development strategy,the competition among sci-tech talents has become increasingly fierce.Stimulating the innovative vigor of sci-tech talents has become a hot topic in theoretical research and policy practice.Based on the data from 246 questionnaires collected from sci-tech talents in Hebei province,this study explored the influence mechanism of an inclusive organizational climate on innovation input from technological talents and verified the mediating effects of innovation self-efficacy and intrinsic motivation.The results indicate that an inclusive organizational climate has a significant positive impact on innovation input,innovation self-efficacy,and intrinsic motivation of sci-tech talents.Both innovation self-efficacy and intrinsic motivation play a partial mediating role between an inclusive climate and innovation input.This study verified the important role of an inclusive climate in an organization’s human resource management practices and encouraged managers to emphasize enhancing the innovation self-efficacy and intrinsic motivation of sci-tech talents,thereby continuously improving the level of innovation. 展开更多
关键词 inclusive climate innovation self-efficacy intrinsic motivation sci-tech talents
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Pudong’s experience of standardization mechanism innovation
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作者 Lyu Xuecheng 《China Standardization》 2024年第6期24-25,共2页
The Pudong New Area has followed the standardization polices of the country,vigorously implemented the standardization strategies,and fulfilled the historical mission of“serving as a pioneer of reform&opening-up ... The Pudong New Area has followed the standardization polices of the country,vigorously implemented the standardization strategies,and fulfilled the historical mission of“serving as a pioneer of reform&opening-up and innovative development”. 展开更多
关键词 HAS STANDARDIZATION mechanism
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The Pathways and Mechanisms for Collaborative Innovation in Vocational Education,Higher Education,and Continuing Education
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作者 Yijun Liu 《Journal of Contemporary Educational Research》 2024年第9期219-236,共18页
Against the backdrop of rapid global economic development,the demand for education has gradually shifted from quantitative growth to qualitative improvement.Vocational education,higher education,and continuing educati... Against the backdrop of rapid global economic development,the demand for education has gradually shifted from quantitative growth to qualitative improvement.Vocational education,higher education,and continuing education are crucial components of China’s education system,each serving different educational functions.However,the collaborative innovation among these three types of education is still in the preliminary exploration stage,with issues such as scattered resources and imperfect coordination mechanisms.This paper systematically reviews relevant domestic and international research and practical experiences,thoroughly analyzes the pathways,models,and mechanisms of collaborative innovation among these three types of education,and proposes practical and operational suggestions based on the actual situation in Xuzhou City.The study finds that collaboration between vocational education,higher education,and continuing education through innovation not only enhances the overall efficiency of educational resources but also promotes regional economic development and social progress.On this basis,this paper proposes specific measures such as building an education resource-sharing platform,promoting a chain-based talent training system,strengthening policy and institutional guarantees,and improving incentive mechanisms,aiming to provide a reference for local education administrators and contribute to the innovative development of education in China. 展开更多
关键词 Vocational education Higher education Continuing education Collaborative innovation PATHWAYS mechanismS Xuzhou City
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Contribution of mechanical forces to structural synaptic plasticity:insights from 3D cellular motility mechanisms
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作者 Rita O.Teodoro Mafalda Ribeiro Ramos Lara Carvalho 《Neural Regeneration Research》 SCIE CAS 2025年第7期1995-1996,共2页
Cells,tissues,and organs are constantly subjected to the action of mechanical forces from the extracellular environment-and the nervous system is no exception.Cell-intrinsic properties such as membrane lipid compositi... Cells,tissues,and organs are constantly subjected to the action of mechanical forces from the extracellular environment-and the nervous system is no exception.Cell-intrinsic properties such as membrane lipid composition,abundance of mechanosensors,and cytoskeletal dynamics make cells more or less likely to sense these forces.Intrinsic and extrinsic cues are integrated by cells and this combined information determines the rate and dynamics of membrane protrusion growth or retraction(Yamada and Sixt,2019).Cell protrusions are extensions of the plasma membrane that play crucial roles in diverse contexts such as cell migration and neuronal synapse formation.In the nervous system,neurons are highly dynamic cells that can change the size and number of their pre-and postsynaptic elements(called synaptic boutons and dendritic spines,respectively),in response to changes in the levels of synaptic activity through a process called plasticity.Synaptic plasticity is a hallmark of the nervous system and is present throughout our lives,being required for functions like memory formation or the learning of new motor skills(Minegishi et al.,2023;Pillai and Franze,2024). 展开更多
关键词 PLASTICITY STRUCTURAL mechanismS
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Research on the Mechanism and Strategy of Equity Investment Driving the Transformation of New Material Innovation Achievements
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作者 Xiao Zhang 《Proceedings of Business and Economic Studies》 2024年第4期136-141,共6页
Under the wave of global technological revolution,the new materials industry is facing difficulties in innovation and transformation.Equity investment has become a key driving force due to its flexible mechanism,risk ... Under the wave of global technological revolution,the new materials industry is facing difficulties in innovation and transformation.Equity investment has become a key driving force due to its flexible mechanism,risk sharing,and deep participation.Based on introducing the current development status of China’s new materials industry,this article reveals the mechanism of equity investment in financial support,risk management,incentive constraints,and resource integration.The article proposes optimization strategies,such as building an information-sharing mechanism and a diversified investment fund system,to promote the high-quality development of the new materials industry driven by innovation and provide strategic guidance for policymakers,investors,and enterprises. 展开更多
关键词 New materials industry Transformation of innovative achievements Equity investment
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Decoding molecular mechanisms:brain aging and Alzheimer's disease
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作者 Mahnoor Hayat Rafay Ali Syed +9 位作者 Hammad Qaiser Mohammad Uzair Khalid Al-Regaiey Roaa Khallaf Lubna Abdullah Mohammed Albassam Imdad Kaleem Xueyi Wang Ran Wang Mehwish SBhatti Shahid Bashir 《Neural Regeneration Research》 SCIE CAS 2025年第8期2279-2299,共21页
The complex morphological,anatomical,physiological,and chemical mechanisms within the aging brain have been the hot topic of research for centuries.The aging process alters the brain structure that affects functions a... The complex morphological,anatomical,physiological,and chemical mechanisms within the aging brain have been the hot topic of research for centuries.The aging process alters the brain structure that affects functions and cognitions,but the worsening of such processes contributes to the pathogenesis of neurodegenerative disorders,such as Alzheimer's disease.Beyond these observable,mild morphological shifts,significant functional modifications in neurotransmission and neuronal activity critically influence the aging brain.Understanding these changes is important for maintaining cognitive health,especially given the increasing prevalence of age-related conditions that affect cognition.This review aims to explore the age-induced changes in brain plasticity and molecular processes,differentiating normal aging from the pathogenesis of Alzheimer's disease,thereby providing insights into predicting the risk of dementia,particularly Alzheimer's disease. 展开更多
关键词 Alzheimer’s disease brain aging cognitive health DEMENTIA molecular mechanisms neuronal activity NEUROPLASTICITY NEUROTRANSMISSION
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Pyroptosis,ferroptosis,and autophagy in spinal cord injury:regulatory mechanisms and therapeutic targets
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作者 Qingcong Zheng Du Wang +1 位作者 Rongjie Lin Weihong Xu 《Neural Regeneration Research》 SCIE CAS 2025年第10期2787-2806,共20页
Regulated cell death is a form of cell death that is actively controlled by biomolecules.Several studies have shown that regulated cell death plays a key role after spinal cord injury.Pyroptosis and ferroptosis are ne... Regulated cell death is a form of cell death that is actively controlled by biomolecules.Several studies have shown that regulated cell death plays a key role after spinal cord injury.Pyroptosis and ferroptosis are newly discovered types of regulated cell deaths that have been shown to exacerbate inflammation and lead to cell death in damaged spinal cords.Autophagy,a complex form of cell death that is interconnected with various regulated cell death mechanisms,has garnered significant attention in the study of spinal cord injury.This injury triggers not only cell death but also cellular survival responses.Multiple signaling pathways play pivotal roles in influencing the processes of both deterioration and repair in spinal cord injury by regulating pyroptosis,ferroptosis,and autophagy.Therefore,this review aims to comprehensively examine the mechanisms underlying regulated cell deaths,the signaling pathways that modulate these mechanisms,and the potential therapeutic targets for spinal cord injury.Our analysis suggests that targeting the common regulatory signaling pathways of different regulated cell deaths could be a promising strategy to promote cell survival and enhance the repair of spinal cord injury.Moreover,a holistic approach that incorporates multiple regulated cell deaths and their regulatory pathways presents a promising multi-target therapeutic strategy for the management of spinal cord injury. 展开更多
关键词 AUTOPHAGY cell death ferroptosis INFLAMMATION pathological mechanisms PYROPTOSIS regulated cell death regulatory pathways spinal cord injury therapeutic targets
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Study on Driving Technology Innovation Using Patent Management Mechanism
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作者 佘丽娜 唐顺良 张俐 《Agricultural Science & Technology》 CAS 2016年第9期2216-2220,共5页
In order to improve the cigarette enterprise technology innovation and patent management status, the macro work should start from the four aspects of patent ideology introduction, patent organization design, perfectin... In order to improve the cigarette enterprise technology innovation and patent management status, the macro work should start from the four aspects of patent ideology introduction, patent organization design, perfecting patent system and implementation of specific measures, and attention should be attached to strengthen the cooperation of the cigarette enterprise management departments. On the other hand, Jn the microscopic work level, it should build the culture atmosphere of the entire tobacco industry respect intellectual property rights, actively cultivate the na- tional patent agents and patent engineers, and gradually promote the patent work to develop in the direction of specialization, self-independence, so as to construct a scientific mechanism for patent management, and enhance the core competitiveness of the tobacco industry. 展开更多
关键词 Cigarette companies Technology innovation Patent management mechanism
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Emission trading innovation mechanism based on blockchain
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作者 Nan Zhao Zhaohan Sheng Hao Yan 《Chinese Journal of Population,Resources and Environment》 2021年第4期369-376,共8页
The rationality and scientific nature of the emission trading mechanism is the key to the effective implementation of environmental and economic policies.As far as China is concerned,there are phenomena such as inform... The rationality and scientific nature of the emission trading mechanism is the key to the effective implementation of environmental and economic policies.As far as China is concerned,there are phenomena such as information asymmetry,low supervision efficiency,and alienation of government and enterprise behaviors caused by the incomplete mechanism of emission trading in the practice of different pilots.The introduction of blockchain technology can innovate the traditional transaction model and form a decentralized peer-to-peer transaction and a trusted emission trading market.To this end,based on the current emission trading mechanism and the characteristics of blockchain technology,this paper couples the core technologies of blockchain with the functional requirements of application scenarios.Then,an innovative application framework is built based on the consortium blockchain Fabric from three aspects:emission trading supervision,secondary trading market construction,as well as emission trading incentive and punishment mechanisms.Technologies such as the consensus mechanism,smart contract,Merkle tree and asymmetric encryption are comprehensively applied in this process.In the construction of the blockchain framework of the secondary market for emission trading,institutional changes and innovations brought about by the blockchain at various levels are analyzed in terms of participants,transaction processes and the transaction scope.At the same time,smart contract functions and algorithms are designed for the purchase,transfer-out and trading of emission rights,and the operation business logic of the smart contract is analyzed.On the whole,this paper explores the application framework of blockchain technology in the field of emission trading at the macro level,and analyzes the application mechanism of the corresponding technologies of blockchain at each coupling point in the framework at the micro level.The collaborative analysis at the two levels shows that blockchain technology and the requirements of emission trading mechanism can be effectively coupled,and the application of blockchain technology can promote the effective supervision of enterprises'emission behavior,making the processes of the purchase,transfer and transaction of emission rights intelligent and automated,and providing technical support for cross regional emission trading to reduce transaction costs and management complexity.In addition,the issuance of emission credits based on smart contract will be a new incentive for companies to actively participate in transactions.Based on the above analysis,this paper believes that the innovative application of blockchain technology is of great significance in the promotion of the market-based allocation of element of emission trading and the rational allocation of environmental resources.It will lead to a major breakthrough in the traditional trading system in terms of trading modes,forming a value transmission network of environmental resources between the government and polluters. 展开更多
关键词 Emission trading innovation mechanism Blockchain Smart contract
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Mechanism and Countermeasures for Action of Scientific and Technological Innovation on Integration of Industrialization and Urbanization 被引量:1
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作者 Xiaolu WU 《Asian Agricultural Research》 2020年第11期9-15,共7页
In the current process of deepening reform in China,industrial structure upgrading,economic structural transformation and new urbanization are important tasks to promote social and economic development,and technologic... In the current process of deepening reform in China,industrial structure upgrading,economic structural transformation and new urbanization are important tasks to promote social and economic development,and technological innovation has gradually become the primary driving force for industrial upgrading,economic transformation and the realization of new urbanization.The article analyzed the action mechanism of scientific and technological innovation on the integration of industrialization and urbanization through qualitative and quantitative methods,found out the prominent problems faced by Henan through the empirical analysis of relevant data of Henan Province,and then proposed the integrated development path driven by scientific and technological innovation. 展开更多
关键词 Technological innovation Integration of industrialization and urbanization Coupling coordination degree New urbanization
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Study on Talent Training Mechanisms of Marine Cultural Industry Based on Collaborative Innovation of Governments,Enterprises,Colleges,Scientific Institutions and Users
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作者 Qu Qunzhen Yang Wei 《Meteorological and Environmental Research》 CAS 2018年第5期37-40,43,共5页
Based on the review of related concepts,the current situation and problems of talent training in marine cultural industry in China were analyzed,and talent training mechanisms of marine cultural industry based on coll... Based on the review of related concepts,the current situation and problems of talent training in marine cultural industry in China were analyzed,and talent training mechanisms of marine cultural industry based on collaborative innovation of governments,enterprises,colleges,scientific institutions and users were proposed to promote the transformation,upgrading and vigorous development of marine cultural industry,accelerate the spread of marine culture with Chinese characteristics,and build China into a maritime power. 展开更多
关键词 Collaborative innovation Governments enterprises colleges scientific institutions and USERS Talent training mechanismS MARINE cultural industry
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Based on the Emerging E-commerce Ecosystem Synergy and Innovation Mechanism Investigation
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作者 Guojun Shi 《Journal of Contemporary Educational Research》 2020年第8期28-30,共3页
E-commerce is a new business model based on Internet information technology,and its internal operation mechanism can be studied in depth from the perspective of the knowledge ecosystem according to the law of knowledg... E-commerce is a new business model based on Internet information technology,and its internal operation mechanism can be studied in depth from the perspective of the knowledge ecosystem according to the law of knowledge ecology.The various knowledge elements in the e-business knowledge ecosystem interact and influence each other,continue to exchange materials and energy according to specific rules,and develop and circulate autonomously so that users can acquire,transfer,share and sublimate knowledge in the business system.Finally,knowledge innovation and new value creation are realized to complete the final value sublimation.Based on this,this paper elaborates on three aspects of e-business ecosystem system synergy theory,e-business ecosystem,and e-business ecosystem synergy and innovation model for the reference of relevant personnel. 展开更多
关键词 Emerging e-commerce ECOSYSTEM innovation mechanism
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Research on Big Data and Artificial Intelligence Aided Decision-Making Mechanism with the Applications on Video Website Homemade Program Innovation 被引量:1
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作者 Ting Li 《International Journal of Technology Management》 2016年第3期21-23,共3页
In this paper, we conduct research on the big data and the artificial intelligence aided decision-making mechanism with the applications on video website homemade program innovation. Make homemade video shows new medi... In this paper, we conduct research on the big data and the artificial intelligence aided decision-making mechanism with the applications on video website homemade program innovation. Make homemade video shows new media platform site content production with new possible, as also make the traditional media found in Internet age, the breakthrough point of the times. Site homemade video program, which is beneficial to reduce copyright purchase demand, reduce the cost, avoid the homogeneity competition, rich advertising marketing at the same time, improve the profit pattern, the organic combination of content production and operation, complete the strategic transformation. On the basis of these advantages, once the site of homemade video program to form a brand and a higher brand influence. Our later research provides the literature survey for the related issues. 展开更多
关键词 Bid Data Artificial Intelligence DECISION-MAKING Video Website Program innovation.
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The Supply-Demand Analysis and Mechanism Innovation of Chinese Rural Public Goods 被引量:2
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作者 XIA Xiang-yang Marxism and Leninism Education,and Hebei Engineering and Technical College,Cangzhou 061001,China 《Asian Agricultural Research》 2011年第5期44-47,共4页
The connotation of rural public goods is expounded.The rural public goods refer to the products and labors that satisfy the production and living of rural residents,economic growth and social progress.The rural public... The connotation of rural public goods is expounded.The rural public goods refer to the products and labors that satisfy the production and living of rural residents,economic growth and social progress.The rural public goods is characterized by non-excludability,non-competitiveness and indispensability of other general public goods.The supply situation of Chinese government to rural public goods is analyzed,as well as the demand situation of rural public goods,which includes farmers' demand on training,the assistance demand of rural weak groups,farmers' demand on comfortable living conditions and farmers' demand on "soft" public goods.The paths for innovating the supply mechanism of rural public goods are put forward,which cover perfecting the decision mechanism of public goods supply;scientifically distributing the supply responsibility of rural public goods;facilitating the reform of each supporting equipment and exploring the multiple capital collecting channels of rural public goods. 展开更多
关键词 RURAL PUBLIC GOODS Supply-demand ANALYSIS Mechanis
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The Mechanism of Synergetic Innovation on Industrial Clusters
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作者 Lan Fang 《Chinese Business Review》 2004年第10期21-24,共4页
The paper summarizes domestic and overseas research results on synergetic innovation. Then it discusses the mechanism of synergetic innovation on industrial clusters according to these theoretical results. Firstly, we... The paper summarizes domestic and overseas research results on synergetic innovation. Then it discusses the mechanism of synergetic innovation on industrial clusters according to these theoretical results. Firstly, we analyze the behavior of synergetic innovation on industrial clusters from a microeconomic point of view. Secondly, we explain component elements of synergetic innovative system. Lastly, we discuss the formative process of synergetic innovation in detail. Thus we can provide synergetic innovation of cluster companies with theoretical guidelines. 展开更多
关键词 industrial clusters synergetic innovation cooperation mechanism
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Research on Intellectual Property Benefits Allocation Mechanism—Using Case of Regional-Development Oriented Collaborative Innovation Center of China
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作者 Duanyang Ren Xiaoyan Song Haibin Zhou 《Open Journal of Applied Sciences》 2015年第8期428-433,共6页
The intellectual property (IP) benefits allocation is a major problem in collaborative innovation, because the collaborative partners have different benefits pursues, and they make the allocation of ownership and bene... The intellectual property (IP) benefits allocation is a major problem in collaborative innovation, because the collaborative partners have different benefits pursues, and they make the allocation of ownership and benefits complicated. If the interests can’t be allocated properly, then the conflicts will occur between the collaborative partners and collaborative relationship can’t last long, so we focus on the benefits allocation mechanism of IP to ensure each participated partner can get the benefits fairly. Some scholars noticed the importance of IP benefits allocation and conducted theoretical research, which provided model and theoretical analysis, but these research contents were not comprehensive, the research methods and evidences seemed inadequate, which leaded the conclusions into?having limited meaning. Thus, we use case study and investigate regional-development oriented collaborative innovation center to examine the benefits allocation mechanism. We find out the problems in the existing benefits allocation mechanism, such as the compensation and rewards are not enough, the benefits allocation should be fair, the payment way is not various and so on. Based on the case study on the status quo and combined with related needs, we put forward that ensure the ownership of IP, attention on regulation construction, benefits protection and so on. We hope this study can solve these problems through case analysis, and benefit to maintain collaborative relationship. 展开更多
关键词 COLLABORATIVE innovation BENEFITS Allocation mechanism COLLABORATIVE innovation Center INTELLECTUAL Property CASE Study
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Mechanism of realizing industrial structure upgrading through technology-driven regional innovation capacity
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作者 KONG Shu-guang CHEN Yu-chuan 《Chinese Business Review》 2008年第9期46-52,61,共8页
Based on the analysis of the formation process of regional innovation capacity, this paper expatiates that the technology is the basis for industrial structure upgrading, while technological innovation is the power of... Based on the analysis of the formation process of regional innovation capacity, this paper expatiates that the technology is the basis for industrial structure upgrading, while technological innovation is the power of regional innovation capacity. It points out that the essential of regional industrial structure upgrading is the transition of regional technology structure from one balance to another. The mechanism of realizing industrial structure upgrading through technology-driven regional innovation capacity is also discussed briefly. 展开更多
关键词 TECHNOLOGY regional innovation capacity industrial structure upgrading mechanism
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The Difficulties and Mechanism Innovation of Constructing China's Rural Multiplex Financial System 被引量:1
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作者 DANG Wen Financial Department,Guangxi Economic Management Cadre College,Nanning 530007,China 《Asian Agricultural Research》 2011年第5期128-131,139,共5页
This paper expounds the necessity of constructing China's rural multiplex financial system as follows.First,overcome the bottleneck effect arising from the shortage of capital in the process of development of rura... This paper expounds the necessity of constructing China's rural multiplex financial system as follows.First,overcome the bottleneck effect arising from the shortage of capital in the process of development of rural small and medium-sized enterprise,and increase farmers' income;second,provide capital support for rural modern industrial development,and promote rural economic development;third,rationally allocate capital,master the money flow and coordinate urban-rural development.The paper also profoundly analyzes the difficulties of constructing China's rural multiplex financial system as follows.First,the existing rural financial system structure is irrational and the function is unsound;second,non-governmental financial market is disorderly and the organization is unsound;third,the rural financial system is simple and the overhaul of rural credit cooperatives system has not yet been done;fourth,the construction of rural system of financial laws and regulations is laggard,and the construction of rural multiplex financial system lacks good social environment.The specific thoughts,measures and countermeasures of constructing mechanism innovation of China's rural multiplex financial system are put forward as follows.First,increasingly perfect legal system and provide legal support for constructing China's rural multiplex financial system;second,quicken the overhaul of rural credit cooperatives system and perfect its function in China's rural multiplex financial system;third,strengthen the degree of support and development,and change the situation of simple structure of rural financial system;fourth,reinforce administrative supervision and perfect public services,and standardize the rural financial market order. 展开更多
关键词 RURAL areas Multiplex FINANCIAL SYSTEM Difficultie
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Microdynamic mechanical properties and fracture evolution mechanism of monzogabbro with a true triaxial multilevel disturbance method 被引量:1
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作者 Zhi Zheng Bin Deng +3 位作者 Hong Liu Wei Wang Shuling Huang Shaojun Li 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2024年第3期385-411,共27页
The far-field microdynamic disturbance caused by the excavation of deep mineral resources and underground engineering can induce surrounding rock damage in high-stress conditions and even lead to disasters.However,the... The far-field microdynamic disturbance caused by the excavation of deep mineral resources and underground engineering can induce surrounding rock damage in high-stress conditions and even lead to disasters.However,the mechanical properties and damage/fracture evolution mechanisms of deep rock induced by microdynamic disturbance under three-dimensional stress states are unclear.Therefore,a true triaxial multilevel disturbance test method is proposed,which can completely simulate natural geostress,excavation stress redistribution(such as stress unloading,concentration and rotation),and subsequently the microdynamic disturbance triggering damaged rock failure.Based on a dynamic true triaxial test platform,true triaxial microdynamic disturbance tests under different frequency and amplitudes were carried out on monzogabbro.The results show that increasing amplitude or decreasing frequency diminishes the failure strength of monzogabbro.Deformation modulus gradually decreases during disturbance failure.As frequency and amplitude increase,the degradation rate of deformation modulus decreases slightly,disturbance dissipated energy increases significantly,and disturbance deformation anisotropy strengthens obviously.A damage model has been proposed to quantitatively characterize the disturbance-induced damage evolution at different frequency and amplitude under true triaxial stress.Before disturbance failure,the micro-tensile crack mechanism is dominant,and the micro-shear crack mechanism increases significantly at failure.With the increase of amplitude and frequency,the micro-shear crack mechanism increases.When approaching disturbance failure,the acoustic emission fractal dimension changes from a stable value to local large oscillation,and finally increases sharply to a high value at failure.Finally,the disturbance-induced failure mechanism of surrounding rock in deep engineering is clearly elucidated. 展开更多
关键词 True triaxial disturbance test Mechanical properties Fracture evolution mechanism Disturbance-induced damage evolution Failure mechanism and precursor
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