At the Symposium on Ecological Protection and High-quality Development of the Yellow River Basin, General Secretary Xi Jinping pointed out that "it should deeply explore the time value contained in the Yellow Riv...At the Symposium on Ecological Protection and High-quality Development of the Yellow River Basin, General Secretary Xi Jinping pointed out that "it should deeply explore the time value contained in the Yellow River culture, tell the story of the Yellow River well, and protect, inherit and carry forward the Yellow River culture". Water park is an important carrier of the Yellow River culture transmission. In this paper, the basic characteristics and regional distribution of water parks in the Yellow River basin are analyzed. For the problems faced by cultural heritage of water parks in the Yellow River basin, from three aspects of exploring and integrating the connotation, innovating communication methods, and shaping brand IP, cultural heritage of water parks in the Yellow River basin is discussed. It is beneficial to carry forward the Yellow River culture, and better meet the spiritual and cultural needs of the people.展开更多
Planar semiconductor InGaAs/InP single photon avalanche diodes with high responsivity and low dark count rate are preferred single photon detectors in near-infrared communication.However,even with well-designed struct...Planar semiconductor InGaAs/InP single photon avalanche diodes with high responsivity and low dark count rate are preferred single photon detectors in near-infrared communication.However,even with well-designed structures and well-con-trolled operational conditions,the performance of InGaAs/InP SPADs is limited by the inherent characteristics of avalanche pro-cess and the growth quality of InGaAs/InP materials.It is difficult to ensure high detection efficiency while the dark count rate is controlled within a certain range at present.In this paper,we fabricated a device with a thick InGaAs absorption region and an anti-reflection layer.The quantum efficiency of this device reaches 83.2%.We characterized the single-photon performance of the device by a quenching circuit consisting of parallel-balanced InGaAs/InP single photon detectors and single-period sinus-oidal pulse gating.The spike pulse caused by the capacitance effect of the device is eliminated by using the characteristics of parallel balanced common mode signal elimination,and the detection of small avalanche pulse amplitude signal is realized.The maximum detection efficiency is 55.4%with a dark count rate of 43.8 kHz and a noise equivalent power of 6.96×10^(−17 )W/Hz^(1/2) at 247 K.Compared with other reported detectors,this SPAD exhibits higher SPDE and lower noise-equivalent power at a higher cooling temperature.展开更多
文摘At the Symposium on Ecological Protection and High-quality Development of the Yellow River Basin, General Secretary Xi Jinping pointed out that "it should deeply explore the time value contained in the Yellow River culture, tell the story of the Yellow River well, and protect, inherit and carry forward the Yellow River culture". Water park is an important carrier of the Yellow River culture transmission. In this paper, the basic characteristics and regional distribution of water parks in the Yellow River basin are analyzed. For the problems faced by cultural heritage of water parks in the Yellow River basin, from three aspects of exploring and integrating the connotation, innovating communication methods, and shaping brand IP, cultural heritage of water parks in the Yellow River basin is discussed. It is beneficial to carry forward the Yellow River culture, and better meet the spiritual and cultural needs of the people.
基金jointly supported by the National Key Research and Development Program of China (2019YFB22-05202)National Natural Science Foundation of China(61774152)
文摘Planar semiconductor InGaAs/InP single photon avalanche diodes with high responsivity and low dark count rate are preferred single photon detectors in near-infrared communication.However,even with well-designed structures and well-con-trolled operational conditions,the performance of InGaAs/InP SPADs is limited by the inherent characteristics of avalanche pro-cess and the growth quality of InGaAs/InP materials.It is difficult to ensure high detection efficiency while the dark count rate is controlled within a certain range at present.In this paper,we fabricated a device with a thick InGaAs absorption region and an anti-reflection layer.The quantum efficiency of this device reaches 83.2%.We characterized the single-photon performance of the device by a quenching circuit consisting of parallel-balanced InGaAs/InP single photon detectors and single-period sinus-oidal pulse gating.The spike pulse caused by the capacitance effect of the device is eliminated by using the characteristics of parallel balanced common mode signal elimination,and the detection of small avalanche pulse amplitude signal is realized.The maximum detection efficiency is 55.4%with a dark count rate of 43.8 kHz and a noise equivalent power of 6.96×10^(−17 )W/Hz^(1/2) at 247 K.Compared with other reported detectors,this SPAD exhibits higher SPDE and lower noise-equivalent power at a higher cooling temperature.
基金supported by National Natural Science Funds of China under Grant No.60973125College Doctoral Funds of China under Grant No.20080359003+1 种基金Anhui College Natural Science Research Project under Grant No.KJ2010B171Research Project of Hefei Normal University under Grant No.2012kj10
文摘在这份报纸，为 m 厚度李重量的 MacWilliams 类型身份在 \mathbbF2 + u\mathbbF2\mathbb 上为线性代码枚举符 { F }_2 + u\mathbb { F }_2 被决定。作为这身份的一个应用程序，作者在 \mathbbF2m + u\mathbbF2m \mathbb 上为线性代码在李重量上获得 MacWilliams 类型身份 { F }_{ 2 ^ m }+ u\mathbb { F }_{ 2 ^ m } 。而且，作者由利用 Krawtchouk 多项式为 m 厚度李重量分布证明两重性。
