To mitigate the impact of noise and inter-ference on multi-level-cell(MLC)flash memory with the use of low-density parity-check(LDPC)codes,we propose a dynamic write-voltage design scheme con-sidering the asymmetric p...To mitigate the impact of noise and inter-ference on multi-level-cell(MLC)flash memory with the use of low-density parity-check(LDPC)codes,we propose a dynamic write-voltage design scheme con-sidering the asymmetric property of raw bit error rate(RBER),which can obtain the optimal write voltage by minimizing a cost function.In order to further improve the decoding performance of flash memory,we put forward a low-complexity entropy-based read-voltage optimization scheme,which derives the read voltages by searching for the optimal entropy value via a log-likelihood ratio(LLR)-aware cost function.Simulation results demonstrate the superiority of our proposed dynamic write-voltage design scheme and read-voltage optimization scheme with respect to the existing counterparts.展开更多
Exploiting new concepts for dense, fast, and nonvolatile random access memory with reduced energy consump- tion is a significant issue for information technology. Here we design an ＇electrically written and optically...Exploiting new concepts for dense, fast, and nonvolatile random access memory with reduced energy consump- tion is a significant issue for information technology. Here we design an ＇electrically written and optically read＇ information storage device employing BiFeO3/A u heterostruetures with strong absorption resonance. The electro- optic effect is the basis for the device design, which arises from the strong absorption resonance in BiFeO3/Au heterostructures and the electrically tunable significant birefringence of the BiFeO3 film. We first construct a sim- ulation calculation of the BiFeO3/Au structure spectrum and identify absorption resonance and electro-optical modulation characteristics. Following a micro scale partition, the surface reflected light intensity of different polarization units is calculated. The results depend on electric polarization states of the BiFeO3 film, thus BiFeO3/Au heterostructures can essentially be designed as a type of electrically written and optically read infor- mation storage device by utilizing the scanning near-field optical microscopy technology based on the conductive silicon cantilever tip with nanofabricated aperture. This work will shed light on information storage technology.展开更多
Based on the ADDIE model,we explored the integration path between Understanding Contemporary China:An English Reading and Writing Textbook and the main textbook of college English reading.Firstly,the basis of textbook...Based on the ADDIE model,we explored the integration path between Understanding Contemporary China:An English Reading and Writing Textbook and the main textbook of college English reading.Firstly,the basis of textbook integration was analyzed,followed by an explanation of the overall design scheme of textbook integration,and then a series of teaching resources were initially developed and used in teaching practice.Through testing,it was found that the integrative teaching of the two sets of textbooks under the ADDIE model achieved good teaching results,and promoted the three aspects of reading literacy,disciplinary literacy,and value leadership.展开更多
Cohesive devices in students’business English writing are regarded as the object of the research.Based on Haliday and Hasan’s cohesion theory,this paper introduces commonly-used cohesive devices in English writing.W...Cohesive devices in students’business English writing are regarded as the object of the research.Based on Haliday and Hasan’s cohesion theory,this paper introduces commonly-used cohesive devices in English writing.With the method of quantitative data,use and misuse frequency of cohesive devices in students’writings can be known.The paper will also analyze why misuses happen through qualitative data analysis and explore right ways of using cohesive devices.展开更多
Three-dimensional(3D)printing has gained popularity in a variety of applications,particularly in the manufacture of wearable devices.Aided by the large degree of freedom in customizable fabrication,3D printing can cat...Three-dimensional(3D)printing has gained popularity in a variety of applications,particularly in the manufacture of wearable devices.Aided by the large degree of freedom in customizable fabrication,3D printing can cater towards the practical requirements of wearable devices in terms of light weight and flexibility.In particular,this focus review aims to cover the important aspect of wearable energy storage devices(WESDs),which is an essential component of most wearable devices.Herein,the topics discussed are the fundamentals of 3D printing inks used,the optimizing strategies in improving the mechanical and electrochemical properties of wearable devices and the recent developments and challenges of wearable electrochemical systems such as batteries and supercapacitors.It can be expected that,with the development of 3D printing technology,realization of the full potential of WESDs and seamless integration into smart devices also needs further in-depth investigations.展开更多
Recently,transmitting diverse signals in different cores of a multicore fiber(MCF)has greatly improved the communication capacity of a single fiber.In such an MCF-based communication system,mux/demux devices with broa...Recently,transmitting diverse signals in different cores of a multicore fiber(MCF)has greatly improved the communication capacity of a single fiber.In such an MCF-based communication system,mux/demux devices with broad bandwidth are of great significance.In this work,we design and fabricate a 19-channel mux/demux device based on femtosecond laser direct writing.The fabricated mux/demux device possesses an average insertion loss of 0.88 dB and intercore crosstalk of no more than−29.1 dB.Moreover,the fabricated mux/demux device features a broad bandwidth across the C+L band.Such a mux/demux device enables low-loss 19-core fiber(de)multiplexing over the whole C+L band,showing a convincing potential value in wavelength-space division multiplexing applications.In addition,a 19-core fiber fan-in/fan-out system is also established based on a pair of mux/demux devices in this work.展开更多
Radio Frequency IDentification(RFID)and related technologies such as Near Field Communication(NFC)are becoming essential in industrial contexts thanks to their ability to perform contactless data exchange,either devic...Radio Frequency IDentification(RFID)and related technologies such as Near Field Communication(NFC)are becoming essential in industrial contexts thanks to their ability to perform contactless data exchange,either device-to-device or tag-to-device.One of the three main operation modes of NFC,called read/write mode,makes use of the latter type of interaction.It is extensively used in business information systems that make use of NFC tags to provide the end-user with augmented information in one of several available NFC data exchange formats,such as plain text,simple URLs or enriched URLs.Using a wide variety of physical form factors,NFC-compatible tags(wireless transponders)are currently available in many locations with applications going from smart posters,contactless tokens,tap-and-go payments or transport ticketing to automated device configuration,patient identification at hospitals or inventory management within supply chains.Most of these applications handle sensitive processes or data.This paper proposes a complete security threat model for the read/write operation mode of NFC used in Next Generation Industrial IoT(Nx-IIoT)contexts.This model,based on a wellknown methodology,STRIDE,allows developers and users to identify NFC applications vulnerabilities or weaknesses,analyze potential threats,propose risk management strategies,and design mitigation mechanisms to mention only some significant examples.展开更多
As one of the four basic skills of language teaching and an aspect of communicative competence,writing seems to be the weakest one among senior school students in China.Most of teachers have had such experiences that ...As one of the four basic skills of language teaching and an aspect of communicative competence,writing seems to be the weakest one among senior school students in China.Most of teachers have had such experiences that although we spend a lot of time marking on the students'writing,but only to find the corrections and comments ignored.The students pay little attention to responses and regard revision of their writing as a punishment.Starting from the perspectives of modern linguistic theory,the pressing demands of the new curriculum,and the practical needs of student development,the study analyses the prevalent misconceptions about writing.The author proposes an assumption of integrating the teaching materials with Reading-to-Write Approach in the senior school writing teaching.To examine the validity of the Approach,about one-year action research is carried out in an ordinary high school,adopting the methodology of literature survey,questionnaire survey,interview,testing and so on.The results of the experiment showed that the approach had a more positive impact on students'writing attitudes and habits than traditional teaching methods.This approach helped them much more in word usage,longer sentences,content,and text structure or development.Besides,the students'compe?tence of interaction and cooperation were enhanced,Therefore,the approach in writing teaching is effective.展开更多
现有目标检测模型在边缘设备上部署时,其检测性能和推理速度的平衡有较大提升空间。针对此问题,本文基于YOLO(you can only look once)v8提出一种可部署到多类边缘设备上的目标检测模型。在模型的骨干网络部分,设计了EC2f(extended coar...现有目标检测模型在边缘设备上部署时,其检测性能和推理速度的平衡有较大提升空间。针对此问题,本文基于YOLO(you can only look once)v8提出一种可部署到多类边缘设备上的目标检测模型。在模型的骨干网络部分,设计了EC2f(extended coarse-to-fine)结构,在降低参数量和计算复杂度的同时降低数据读写量;在颈部网络部分,将颈部网络替换为YOLOv6-3.0版本的颈部网络,加速了模型推理,并将推理精度维持在较好水平;预测头网络部分设计了多尺度卷积检测头,进一步降低了模型的计算复杂度和参数度。设计了两个版本(n/s尺度)以适应不同的边缘设备。在X光数据集的实验表明,模型在推理精度上比同尺度的基准模型分别提升0.5/1.7百分点,推理速度上分别提升11.6%/11.2%。在其他数据集上的泛化性能测试表明,模型的推理速度提升了10%以上,精度降低控制在1.3%以内。实验证明,模型在推理精度和速度之间实现了良好的平衡。展开更多
基金supported in part by the NSF of China under Grants 62322106,62071131,U2001203,61871136the Guangdong Basic and Applied Basic Research Foundation under Grant 2022B1515020086+1 种基金the International Collaborative Research Program of Guangdong Science and Technology Department under Grant 2022A0505050070the Industrial R&D Project of Haoyang Electronic Co.,Ltd.under Grant 2022440002001494.
文摘To mitigate the impact of noise and inter-ference on multi-level-cell(MLC)flash memory with the use of low-density parity-check(LDPC)codes,we propose a dynamic write-voltage design scheme con-sidering the asymmetric property of raw bit error rate(RBER),which can obtain the optimal write voltage by minimizing a cost function.In order to further improve the decoding performance of flash memory,we put forward a low-complexity entropy-based read-voltage optimization scheme,which derives the read voltages by searching for the optimal entropy value via a log-likelihood ratio(LLR)-aware cost function.Simulation results demonstrate the superiority of our proposed dynamic write-voltage design scheme and read-voltage optimization scheme with respect to the existing counterparts.
基金Supported by the National Natural Science Foundation of China under Grant No 11304384the Research Project of National University of Defense Technology under Grant No JC13-07-02
文摘Exploiting new concepts for dense, fast, and nonvolatile random access memory with reduced energy consump- tion is a significant issue for information technology. Here we design an ＇electrically written and optically read＇ information storage device employing BiFeO3/A u heterostruetures with strong absorption resonance. The electro- optic effect is the basis for the device design, which arises from the strong absorption resonance in BiFeO3/Au heterostructures and the electrically tunable significant birefringence of the BiFeO3 film. We first construct a sim- ulation calculation of the BiFeO3/Au structure spectrum and identify absorption resonance and electro-optical modulation characteristics. Following a micro scale partition, the surface reflected light intensity of different polarization units is calculated. The results depend on electric polarization states of the BiFeO3 film, thus BiFeO3/Au heterostructures can essentially be designed as a type of electrically written and optically read infor- mation storage device by utilizing the scanning near-field optical microscopy technology based on the conductive silicon cantilever tip with nanofabricated aperture. This work will shed light on information storage technology.
基金funded by Project Information:2022 Guangzhou Municipal Higher Education Teaching Research and Reform Key Research Project:“Innovation and Practice of English Reading Curriculum Ideological and Political in Colleges and Universities:A Study on the Integration of Understanding Contemporary China:An English Reading and Writing Textbook and English Reading Teaching”(2023JGZDXM001).
文摘Based on the ADDIE model,we explored the integration path between Understanding Contemporary China:An English Reading and Writing Textbook and the main textbook of college English reading.Firstly,the basis of textbook integration was analyzed,followed by an explanation of the overall design scheme of textbook integration,and then a series of teaching resources were initially developed and used in teaching practice.Through testing,it was found that the integrative teaching of the two sets of textbooks under the ADDIE model achieved good teaching results,and promoted the three aspects of reading literacy,disciplinary literacy,and value leadership.
文摘Cohesive devices in students’business English writing are regarded as the object of the research.Based on Haliday and Hasan’s cohesion theory,this paper introduces commonly-used cohesive devices in English writing.With the method of quantitative data,use and misuse frequency of cohesive devices in students’writings can be known.The paper will also analyze why misuses happen through qualitative data analysis and explore right ways of using cohesive devices.
基金Australian Research Council,Grant/Award Numbers:DP190100120,FT200100015。
文摘Three-dimensional(3D)printing has gained popularity in a variety of applications,particularly in the manufacture of wearable devices.Aided by the large degree of freedom in customizable fabrication,3D printing can cater towards the practical requirements of wearable devices in terms of light weight and flexibility.In particular,this focus review aims to cover the important aspect of wearable energy storage devices(WESDs),which is an essential component of most wearable devices.Herein,the topics discussed are the fundamentals of 3D printing inks used,the optimizing strategies in improving the mechanical and electrochemical properties of wearable devices and the recent developments and challenges of wearable electrochemical systems such as batteries and supercapacitors.It can be expected that,with the development of 3D printing technology,realization of the full potential of WESDs and seamless integration into smart devices also needs further in-depth investigations.
基金supported by the National Natural Science Foundation of China(Grant Nos.62125503 and 62261160388)the Key R&D Program of Hubei Province of China(Grant Nos.2020BAB001 and 2021BAA024)+3 种基金the Key R&D Program of Guangdong Province(Grant No.2018B030325002)the Science and Technology Innovation Commission of Shenzhen(Grant No.JCYJ20200109114018750)the Open Projects Foundation(No.SKLD2201)of State Key Laboratory of Optical Fiber and Cable Manufacture Technology(YOFC)the Innovation Project of Optics Valley Laboratory(Grant No.OVL2021BG004).
文摘Recently,transmitting diverse signals in different cores of a multicore fiber(MCF)has greatly improved the communication capacity of a single fiber.In such an MCF-based communication system,mux/demux devices with broad bandwidth are of great significance.In this work,we design and fabricate a 19-channel mux/demux device based on femtosecond laser direct writing.The fabricated mux/demux device possesses an average insertion loss of 0.88 dB and intercore crosstalk of no more than−29.1 dB.Moreover,the fabricated mux/demux device features a broad bandwidth across the C+L band.Such a mux/demux device enables low-loss 19-core fiber(de)multiplexing over the whole C+L band,showing a convincing potential value in wavelength-space division multiplexing applications.In addition,a 19-core fiber fan-in/fan-out system is also established based on a pair of mux/demux devices in this work.
文摘Radio Frequency IDentification(RFID)and related technologies such as Near Field Communication(NFC)are becoming essential in industrial contexts thanks to their ability to perform contactless data exchange,either device-to-device or tag-to-device.One of the three main operation modes of NFC,called read/write mode,makes use of the latter type of interaction.It is extensively used in business information systems that make use of NFC tags to provide the end-user with augmented information in one of several available NFC data exchange formats,such as plain text,simple URLs or enriched URLs.Using a wide variety of physical form factors,NFC-compatible tags(wireless transponders)are currently available in many locations with applications going from smart posters,contactless tokens,tap-and-go payments or transport ticketing to automated device configuration,patient identification at hospitals or inventory management within supply chains.Most of these applications handle sensitive processes or data.This paper proposes a complete security threat model for the read/write operation mode of NFC used in Next Generation Industrial IoT(Nx-IIoT)contexts.This model,based on a wellknown methodology,STRIDE,allows developers and users to identify NFC applications vulnerabilities or weaknesses,analyze potential threats,propose risk management strategies,and design mitigation mechanisms to mention only some significant examples.
文摘As one of the four basic skills of language teaching and an aspect of communicative competence,writing seems to be the weakest one among senior school students in China.Most of teachers have had such experiences that although we spend a lot of time marking on the students'writing,but only to find the corrections and comments ignored.The students pay little attention to responses and regard revision of their writing as a punishment.Starting from the perspectives of modern linguistic theory,the pressing demands of the new curriculum,and the practical needs of student development,the study analyses the prevalent misconceptions about writing.The author proposes an assumption of integrating the teaching materials with Reading-to-Write Approach in the senior school writing teaching.To examine the validity of the Approach,about one-year action research is carried out in an ordinary high school,adopting the methodology of literature survey,questionnaire survey,interview,testing and so on.The results of the experiment showed that the approach had a more positive impact on students'writing attitudes and habits than traditional teaching methods.This approach helped them much more in word usage,longer sentences,content,and text structure or development.Besides,the students'compe?tence of interaction and cooperation were enhanced,Therefore,the approach in writing teaching is effective.
文摘现有目标检测模型在边缘设备上部署时,其检测性能和推理速度的平衡有较大提升空间。针对此问题,本文基于YOLO(you can only look once)v8提出一种可部署到多类边缘设备上的目标检测模型。在模型的骨干网络部分,设计了EC2f(extended coarse-to-fine)结构,在降低参数量和计算复杂度的同时降低数据读写量;在颈部网络部分,将颈部网络替换为YOLOv6-3.0版本的颈部网络,加速了模型推理,并将推理精度维持在较好水平;预测头网络部分设计了多尺度卷积检测头,进一步降低了模型的计算复杂度和参数度。设计了两个版本(n/s尺度)以适应不同的边缘设备。在X光数据集的实验表明,模型在推理精度上比同尺度的基准模型分别提升0.5/1.7百分点,推理速度上分别提升11.6%/11.2%。在其他数据集上的泛化性能测试表明,模型的推理速度提升了10%以上,精度降低控制在1.3%以内。实验证明,模型在推理精度和速度之间实现了良好的平衡。
