本文提出了一种新型的射频识别超高频倒F形标签天线的设计,分析了其弯折微带线高度、宽度对天线谐振特性的影响.O地同在一带,ryband can be obtain仿真结果显示,弯折微带线宽度和高度对其谐振频率影响显著,采用调整其弯折微带线高度、宽...本文提出了一种新型的射频识别超高频倒F形标签天线的设计,分析了其弯折微带线高度、宽度对天线谐振特性的影响.O地同在一带,ryband can be obtain仿真结果显示,弯折微带线宽度和高度对其谐振频率影响显著,采用调整其弯折微带线高度、宽度,可以改变该标签天线的工作频率。最后,采用TI公司的UHF Gen2 Strap标签芯片设计出一款超高频倒F形标签天线,同时给出了该标签天线的谐振频率、方向图以及天线效率等。结果表明该标签天线比较适合应用于RFID电子标签中。展开更多
A formalized calculus system called F_fuzzy calculus system, which is a symbol deduction system to formalize fuzzy inference, is constructed in this paper. The fuzzy modus ponens was completely formalized in this calc...A formalized calculus system called F_fuzzy calculus system, which is a symbol deduction system to formalize fuzzy inference, is constructed in this paper. The fuzzy modus ponens was completely formalized in this calculus system.展开更多
We study a Riemannian manifolds M with a f-structures. If the tangent bundle of the Riemannian manifolds is TM=DD⊥ dimD=2P,dimD⊥=q=n-2p≥1. We can define a generalized contact manifolds, get some property of it.
The radical-molecule reaction F＋propene （CH2CHCH3） was studied in detail by using the Becke＇s three parameter Lee-Yang-Parr-B3LYP/6-311G（d,p） and coupled cluster with single, double, and triple excitationsCCSD（...The radical-molecule reaction F＋propene （CH2CHCH3） was studied in detail by using the Becke＇s three parameter Lee-Yang-Parr-B3LYP/6-311G（d,p） and coupled cluster with single, double, and triple excitationsCCSD（T）/6-311＋G（2d,2p）. It is shown that F＋propene reaction mainly occurs through complex-formation mechanism： F attacks the double bond of propene leading to the formation of complex 1 and complex 2. As the two radical complexes are metastable, they can quickly dissociate to H＋C3HsF, CH3＋C2H3F and HF＋C3H5. Based on the ab initio calculations, the CH3＋C2H3F is the main channel, and the H elimination and HF forming channels also provide some contribution to products. The calculated values are in good agreement with the recently reported experimental results.展开更多
Carbon nanotubes are a promising candidate for the application of flexible electronics due to the ultrahigh intrinsic conductivity and excellent mechanical flexibility. In the present work, the morphology of the ultra...Carbon nanotubes are a promising candidate for the application of flexible electronics due to the ultrahigh intrinsic conductivity and excellent mechanical flexibility. In the present work, the morphology of the ultrathin (diameter<20 nm) multi-walled carbon nanotubes (MWCNTs) under an axial compression was investigated by using in-situ transmission electron microscopy. Moreover, the overall dynamic deformation processes and the force-displacement (F-D) curves of the MWCNTs were also examined. Interestingly, the MWCNTs almost restored their original morphology after 15 loading-unloading cycles. The deformation and recovery process indicate that the MWCNTs are flexible and exhibit excellent durability against compression. The Young’s modulus of the MWCNTs is estimated with the value of ∽0.655 TPa derived from the F-D curves fitting. Our results suggest that the ultrathin carbon nanotube structures may have great application potentials in flexible devices.展开更多
文摘本文提出了一种新型的射频识别超高频倒F形标签天线的设计,分析了其弯折微带线高度、宽度对天线谐振特性的影响.O地同在一带,ryband can be obtain仿真结果显示,弯折微带线宽度和高度对其谐振频率影响显著,采用调整其弯折微带线高度、宽度,可以改变该标签天线的工作频率。最后,采用TI公司的UHF Gen2 Strap标签芯片设计出一款超高频倒F形标签天线,同时给出了该标签天线的谐振频率、方向图以及天线效率等。结果表明该标签天线比较适合应用于RFID电子标签中。
文摘A formalized calculus system called F_fuzzy calculus system, which is a symbol deduction system to formalize fuzzy inference, is constructed in this paper. The fuzzy modus ponens was completely formalized in this calculus system.
文摘We study a Riemannian manifolds M with a f-structures. If the tangent bundle of the Riemannian manifolds is TM=DD⊥ dimD=2P,dimD⊥=q=n-2p≥1. We can define a generalized contact manifolds, get some property of it.
基金Ⅴ. ACKN0WLEDGMENTS This work was supported by the National Natural Science Foundation of China （No.20328304, No.10574068, No.20533060 and No.20525313）.
文摘The radical-molecule reaction F＋propene （CH2CHCH3） was studied in detail by using the Becke＇s three parameter Lee-Yang-Parr-B3LYP/6-311G（d,p） and coupled cluster with single, double, and triple excitationsCCSD（T）/6-311＋G（2d,2p）. It is shown that F＋propene reaction mainly occurs through complex-formation mechanism： F attacks the double bond of propene leading to the formation of complex 1 and complex 2. As the two radical complexes are metastable, they can quickly dissociate to H＋C3HsF, CH3＋C2H3F and HF＋C3H5. Based on the ab initio calculations, the CH3＋C2H3F is the main channel, and the H elimination and HF forming channels also provide some contribution to products. The calculated values are in good agreement with the recently reported experimental results.
基金supported by the National Natural Science Foundation of China (No.51573201, No.21773205, No.51501209, and No.201675165)NSFC-Zhejiang Joint Fund for the Integration of Industrialization and Informatization (U1709205)+6 种基金National Key R&D Program of China (2017YFB0406000)the Project of the Chinese Academy of Sciences (YZ201640 and KFZDSW-409)Public Welfare Project of Zhejiang Province (2016C31026)Science and Technology Major Project of Ningbo (2016B10038 and 2016S1002)International S&T Cooperation Program of Ningbo (2017D10016)the 3315 Program of Ningbothe Science and Technology Major Project of Ningbo (2015S1001)
文摘Carbon nanotubes are a promising candidate for the application of flexible electronics due to the ultrahigh intrinsic conductivity and excellent mechanical flexibility. In the present work, the morphology of the ultrathin (diameter<20 nm) multi-walled carbon nanotubes (MWCNTs) under an axial compression was investigated by using in-situ transmission electron microscopy. Moreover, the overall dynamic deformation processes and the force-displacement (F-D) curves of the MWCNTs were also examined. Interestingly, the MWCNTs almost restored their original morphology after 15 loading-unloading cycles. The deformation and recovery process indicate that the MWCNTs are flexible and exhibit excellent durability against compression. The Young’s modulus of the MWCNTs is estimated with the value of ∽0.655 TPa derived from the F-D curves fitting. Our results suggest that the ultrathin carbon nanotube structures may have great application potentials in flexible devices.
