Objective The Shizishan Pb-Zn deposit is located in the southeastern margin of the Yangtze Block,and its Pb-Zn orebodies are mainly hosted in the Lower Cambrian Qingxudong Formation limestone.Previous researches have ...Objective The Shizishan Pb-Zn deposit is located in the southeastern margin of the Yangtze Block,and its Pb-Zn orebodies are mainly hosted in the Lower Cambrian Qingxudong Formation limestone.Previous researches have investigated the geological characteristics,geochemistry and fluid inclusions of this deposit,but展开更多
1 Introduction The Tudimiaogou-Yindongshan lead-zinc polymetallic orefield is located in the Tudimiaogou-Weimoshi lead and zinc silver polymetallic metallogenic belt.The belt is an important part of southwestern Henan...1 Introduction The Tudimiaogou-Yindongshan lead-zinc polymetallic orefield is located in the Tudimiaogou-Weimoshi lead and zinc silver polymetallic metallogenic belt.The belt is an important part of southwestern Henan lead and展开更多
The South China block(SC),composed of Cathaysia(CA),Jiangnan Orogenic belt(JNB),and Yangtze block(YB),is one of the most important poly-metallic metallogenic provinces in the world(Zhang et al.,2013),containing of fou...The South China block(SC),composed of Cathaysia(CA),Jiangnan Orogenic belt(JNB),and Yangtze block(YB),is one of the most important poly-metallic metallogenic provinces in the world(Zhang et al.,2013),containing of four famous major Mesozoic metallogenic belts,involving the Middle-Lower Yangtze Fe-Cu-Au metallogenic belt(MYMB).展开更多
Sound source recognition is a part of environmental sound recognition,which is one of the most important research areas in pattern recognition.Impact sounds carry much physical information associated with the sound so...Sound source recognition is a part of environmental sound recognition,which is one of the most important research areas in pattern recognition.Impact sounds carry much physical information associated with the sound sources,which makes impact sound based sound source recognition an important approach to improve recognition performance.In this study,the impact sound continuum synthesized with a ball-plate collision model is used for material recognition of the impacted plates.The basis function learning method and time-frequency representation methods,including the short time Fourier transform and the wavelet packet transform,are applied into classification and the recognition results are compared.The result shows that the features obtained by using the basis function learning perform better for material classification of the impacted plates than that by using the short time Fourier transform and the wavelet packet transform.This demonstrates the high efficiency and superiority of this method in material recognition of sound sources.展开更多
Spintronic devices based on spin orbit torque(SoT)have become the most promising pathway to the nextgeneration of ultralow-power nonvolatile logic and memory applications.Typical SOT-based spintronic devices consist o...Spintronic devices based on spin orbit torque(SoT)have become the most promising pathway to the nextgeneration of ultralow-power nonvolatile logic and memory applications.Typical SOT-based spintronic devices consist of two functional materials:a spin source and a magnetic material.Spin source materials possess a strong spin orbit coupling,enabling efficient interconversion between charge and spin current,Magnetic materials are used to process and archive the information via the interaction between the local magnetic moment and the spin current generated from spin source.Considerable efforts have been put into the design of materials and devices in the past decades to realize the electrical control of magnetic switching.However,a number of key challenges stll remain to be addressed for the practical application.In this paper,we reviewed the development of a range of novel materials for both the spin source and the magnetic functionalities,particularly the complex oxides and organic spintronic materials.We also discussed and highlighted several key issues,such as the mechanism and manipulation of SOT and the large-scale integration of sOT-based devices,which merit more attention in the future.展开更多
Obsolescence of integrated systems which contain hardware and software is a problem that affects multiple industries and can occur for many reasons,including technological,economic,organizational,and social factors.It...Obsolescence of integrated systems which contain hardware and software is a problem that affects multiple industries and can occur for many reasons,including technological,economic,organizational,and social factors.It is especially acute in products and systems that have long life cycles,where a high rate of technological innovation of the subcomponents result in a mismatch in life cycles between the components and the systems.While several approaches for obsolescence forecasting exist,they often require data that may not be available.This paper describes an approach using non-probabilistic scenarios coupled with decision analysis to investigate how particular scenarios influence priority setting for products and systems.Scenarios are generated from a list of emergent and future conditions related to obsolescence.The key result is an identification of the most and least disruptive scenarios to the decision maker’s priorities.An example is presented related to the selection of technologies for energy islanding,which demonstrates the methodology using six obsolescence scenarios.The paper should be of broad interest to scholars and practitioners engaged with enterprise risk management and similar challenges of large-scale systems.展开更多
基金financially supported by the National Natural Science Foundation of China(grant No.41303026)
文摘Objective The Shizishan Pb-Zn deposit is located in the southeastern margin of the Yangtze Block,and its Pb-Zn orebodies are mainly hosted in the Lower Cambrian Qingxudong Formation limestone.Previous researches have investigated the geological characteristics,geochemistry and fluid inclusions of this deposit,but
文摘1 Introduction The Tudimiaogou-Yindongshan lead-zinc polymetallic orefield is located in the Tudimiaogou-Weimoshi lead and zinc silver polymetallic metallogenic belt.The belt is an important part of southwestern Henan lead and
基金jointly sponsored by the National Natural Science Foundation of China(Grant Nos.41630320,92062108)the Geology Survey Project(Grant Nos.DD20190012,DD20160082)the Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resource,Institute of Geology,Chinese Academy of Geological Sciences(Grant No.J1901-16)
文摘The South China block(SC),composed of Cathaysia(CA),Jiangnan Orogenic belt(JNB),and Yangtze block(YB),is one of the most important poly-metallic metallogenic provinces in the world(Zhang et al.,2013),containing of four famous major Mesozoic metallogenic belts,involving the Middle-Lower Yangtze Fe-Cu-Au metallogenic belt(MYMB).
基金supported by the National Natural Science Foundation of China(11074202,11574249)
文摘Sound source recognition is a part of environmental sound recognition,which is one of the most important research areas in pattern recognition.Impact sounds carry much physical information associated with the sound sources,which makes impact sound based sound source recognition an important approach to improve recognition performance.In this study,the impact sound continuum synthesized with a ball-plate collision model is used for material recognition of the impacted plates.The basis function learning method and time-frequency representation methods,including the short time Fourier transform and the wavelet packet transform,are applied into classification and the recognition results are compared.The result shows that the features obtained by using the basis function learning perform better for material classification of the impacted plates than that by using the short time Fourier transform and the wavelet packet transform.This demonstrates the high efficiency and superiority of this method in material recognition of sound sources.
基金the National Key Research and Development Program of China(GrantNo.2021YFA1601004)the National Natural ScienceFoundation of China(Grant No.52102135).
文摘Spintronic devices based on spin orbit torque(SoT)have become the most promising pathway to the nextgeneration of ultralow-power nonvolatile logic and memory applications.Typical SOT-based spintronic devices consist of two functional materials:a spin source and a magnetic material.Spin source materials possess a strong spin orbit coupling,enabling efficient interconversion between charge and spin current,Magnetic materials are used to process and archive the information via the interaction between the local magnetic moment and the spin current generated from spin source.Considerable efforts have been put into the design of materials and devices in the past decades to realize the electrical control of magnetic switching.However,a number of key challenges stll remain to be addressed for the practical application.In this paper,we reviewed the development of a range of novel materials for both the spin source and the magnetic functionalities,particularly the complex oxides and organic spintronic materials.We also discussed and highlighted several key issues,such as the mechanism and manipulation of SOT and the large-scale integration of sOT-based devices,which merit more attention in the future.
基金This work was supported in part by the National Science Foundation Grant 1747767"Planning IUCRC University of Virginia:Center for Hardware and Embedded System Security and Trust(CHEST)",and in part by the Commonwealth Center for Advanced Logistics Systems(CCALS).
文摘Obsolescence of integrated systems which contain hardware and software is a problem that affects multiple industries and can occur for many reasons,including technological,economic,organizational,and social factors.It is especially acute in products and systems that have long life cycles,where a high rate of technological innovation of the subcomponents result in a mismatch in life cycles between the components and the systems.While several approaches for obsolescence forecasting exist,they often require data that may not be available.This paper describes an approach using non-probabilistic scenarios coupled with decision analysis to investigate how particular scenarios influence priority setting for products and systems.Scenarios are generated from a list of emergent and future conditions related to obsolescence.The key result is an identification of the most and least disruptive scenarios to the decision maker’s priorities.An example is presented related to the selection of technologies for energy islanding,which demonstrates the methodology using six obsolescence scenarios.The paper should be of broad interest to scholars and practitioners engaged with enterprise risk management and similar challenges of large-scale systems.
