随着中小企业(Small and Midium-sized Business,SMB)接入交换机市场规模的扩大,行业标准接入交换机已难以满足客户对低价格、高质量、高易用性的要求。本文根据运用场景制定质量策略,通过电路重构、设计精简、去除过设计和功能重定义...随着中小企业(Small and Midium-sized Business,SMB)接入交换机市场规模的扩大,行业标准接入交换机已难以满足客户对低价格、高质量、高易用性的要求。本文根据运用场景制定质量策略,通过电路重构、设计精简、去除过设计和功能重定义等方法降低成本,通过产品使用旅程挖掘易用性痛点,完成了对SMB接入交换机的质量提高、成本降低和易用性改善的目标,在高质量、高易用的前提下实现了低价格。展开更多
A high-performance quasi-solid polymer electrolyte for sodium metal batteries(SMBs)based on in-situ polymerized poly(1,3-dioxolane)(DOL)with 20%volume ratio of fluoroethylene carbonate(FEC),termed"PDFE-20",i...A high-performance quasi-solid polymer electrolyte for sodium metal batteries(SMBs)based on in-situ polymerized poly(1,3-dioxolane)(DOL)with 20%volume ratio of fluoroethylene carbonate(FEC),termed"PDFE-20",is proposed in this work.It is demonstrated PDFE-20 possesses a room-temperature ionic conductivity of 3.31×10^(-3) S cm^(-1),an ionic diffusion activation energy of 0.10 eV,and an oxidation potential of 4.4 V.SMBs based on PDFE-20 and Na_(3)V_(2)(PO_(4))_(3)(NVP)cathodes were evaluated with an active material mass loading of 6.8 mg cm^(-2).The cell displayed an initial discharge specific capacity of 104 mA h g^(-1),and97.1%capacity retention after 100 cycles at 0.5 C.In-situ polymerization conformally coats the anode/-cathode interfaces,avoiding geometrical gaps and high charge transfer resistance with ex-situ polymerization of the same chemistry.FEC acts as a plasticizer during polymerization to suppress crystallization and significantly improves ionic transport.During battery cycling FEC promotes mechanical congruence of electrolyte-electrode interfaces while forming a stable NaF-rich solid electrolyte interphase(SEI)at the anode.Density functional theory(DFT)calculations were also performed to further understand the role FEC in the poly(DOL)-FEC electrolytes.This work broadens the application of in-situ prepared poly(DOL)electrolytes to sodium storage and demonstrates the crucial role of FEC in improving the electrochemical performance.展开更多
Technology-based SMEs have the advantages of short construction period,fast decision-making mechanism,low management cost,high innovation efficiency,etc.However,financing difficulties have always been an important iss...Technology-based SMEs have the advantages of short construction period,fast decision-making mechanism,low management cost,high innovation efficiency,etc.However,financing difficulties have always been an important issue that plagues the development of high-tech SMEs.The problem of corporate financing will not only hinder the process of technological innovation,but also reduce the efficiency of achievement transformation.This article sorts out the typical financing problems of technology-based SMEs,and proposes suggestions from strengthening corporate system construction,broadening financing channels,enhancing market financing vitality,and improving support policy systems,in order to improve the financing of technology-based SMEs.展开更多
Different from International Phonetic Alphabet learning,phonics as an effective way of spelling and reading gets more at⁃tention in China.But it faces many problems in implementation process.This paper introduces a ca...Different from International Phonetic Alphabet learning,phonics as an effective way of spelling and reading gets more at⁃tention in China.But it faces many problems in implementation process.This paper introduces a case study of a technology-based phonics teaching and learning.This paper results from two classes in an elementary school revealed that pupils broke through the difficulties of learning phonics on technology-based learning.展开更多
文摘随着中小企业(Small and Midium-sized Business,SMB)接入交换机市场规模的扩大,行业标准接入交换机已难以满足客户对低价格、高质量、高易用性的要求。本文根据运用场景制定质量策略,通过电路重构、设计精简、去除过设计和功能重定义等方法降低成本,通过产品使用旅程挖掘易用性痛点,完成了对SMB接入交换机的质量提高、成本降低和易用性改善的目标,在高质量、高易用的前提下实现了低价格。
基金financially supported by the National Natural Science Foundation of China(Grant Nos.52072105 and 21676067)the Key R&D Program of Anhui Province(202104a05020044)+3 种基金the Anhui Provincial Natural Science Foundation(2108085J23)the Major Science and Technology Projects in Anhui Province(202003a05020014,2021e03020001)the Fundamental Research Funds for the Central Universities(PA2021KCPY0028,JZ2022HGTB0251)supported by the National Science Foundation,Division of Materials Research,Award Number 1938833。
文摘A high-performance quasi-solid polymer electrolyte for sodium metal batteries(SMBs)based on in-situ polymerized poly(1,3-dioxolane)(DOL)with 20%volume ratio of fluoroethylene carbonate(FEC),termed"PDFE-20",is proposed in this work.It is demonstrated PDFE-20 possesses a room-temperature ionic conductivity of 3.31×10^(-3) S cm^(-1),an ionic diffusion activation energy of 0.10 eV,and an oxidation potential of 4.4 V.SMBs based on PDFE-20 and Na_(3)V_(2)(PO_(4))_(3)(NVP)cathodes were evaluated with an active material mass loading of 6.8 mg cm^(-2).The cell displayed an initial discharge specific capacity of 104 mA h g^(-1),and97.1%capacity retention after 100 cycles at 0.5 C.In-situ polymerization conformally coats the anode/-cathode interfaces,avoiding geometrical gaps and high charge transfer resistance with ex-situ polymerization of the same chemistry.FEC acts as a plasticizer during polymerization to suppress crystallization and significantly improves ionic transport.During battery cycling FEC promotes mechanical congruence of electrolyte-electrode interfaces while forming a stable NaF-rich solid electrolyte interphase(SEI)at the anode.Density functional theory(DFT)calculations were also performed to further understand the role FEC in the poly(DOL)-FEC electrolytes.This work broadens the application of in-situ prepared poly(DOL)electrolytes to sodium storage and demonstrates the crucial role of FEC in improving the electrochemical performance.
文摘Technology-based SMEs have the advantages of short construction period,fast decision-making mechanism,low management cost,high innovation efficiency,etc.However,financing difficulties have always been an important issue that plagues the development of high-tech SMEs.The problem of corporate financing will not only hinder the process of technological innovation,but also reduce the efficiency of achievement transformation.This article sorts out the typical financing problems of technology-based SMEs,and proposes suggestions from strengthening corporate system construction,broadening financing channels,enhancing market financing vitality,and improving support policy systems,in order to improve the financing of technology-based SMEs.
文摘Different from International Phonetic Alphabet learning,phonics as an effective way of spelling and reading gets more at⁃tention in China.But it faces many problems in implementation process.This paper introduces a case study of a technology-based phonics teaching and learning.This paper results from two classes in an elementary school revealed that pupils broke through the difficulties of learning phonics on technology-based learning.
