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This paper proposes a well-performing hybrid-type truly quantum random number generator based on the time interval between two independent single-photon detection signals, which is practical and intuitive, and generates the initial random number sources from a combination of multiple existing random number sources. A time-to-amplitude converter and multichannel analyzer are used for qualitative analysis to demonstrate that each and every step is random. Furthermore, a carefully designed data acquisition system is used to obtain a high-quality random sequence. Our scheme is simple and proves that the random number bit rate can be dramatically increased to satisfy practical requirements. 相似文献
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异黄酮化合物具有心血管活性[1],雌激素活性[2]及抗骨质疏松[3]活性等。3 苯基 4(1H)喹啉酮衍生物是异黄酮化合物的等电子体,文献报道它具有与异黄酮化合物相似的心血管活性[4]和抗肿瘤[5]活性。结构中具有氟原子的化合物大多能改善脂溶性,增强生理活性,且能选择性作用于脑细胞及脑血管;喹诺酮类抗菌药中具有优良抗菌活性的化合物几乎都含有氟原子。我们对含氟的3 苯基 4(1H)喹啉酮类化合物进行了研究。以氟氯苯胺为原料,合成了其7 氯衍生物(化合物A1~A4),及5 氯衍生物(化合物B1~B4),其中7 氯衍生物为主产物,合成路线如下:化合… 相似文献
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In Ga As/In P single photon avalanche diodes(SPADs) are more and more available in many research fields. They are affected by afterpulsing which leads to a poor single photon detection probability. We present an In Ga As/In P avalanche photodiode with an active quenching circuit on an application specific integrated circuit(ASIC). It can quench the avalanche rapidly and then reduce the afterpulse rate. Also this quenching circuit can operate in both free-running and gated modes.Furthermore, a new technique is introduced to characterize the influence of the higher order of afterpulses, which uses a program running on a field programmable gate array(FPGA) integrated circuit. 相似文献
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本文基于变革型领导理论、知识共享理论、团队创造力理论及团队异质性理论,研究变革型领导对高新技术企业研发团队创造力的影响,及知识共享在这一作用过程中的中介效应,并提出带倒U型调节的混合模型,探索团队成员异质性的倒U型调节效应。通过对162家高新技术企业的实证研究,得出以下主要结论:变革型领导对研发团队创造力有显著正向影响;知识共享在变革型领导与研发团队创造力之间起部分中介作用;团队成员异质性在变革型领导与知识共享之间起倒U型调节作用,在知识共享与研发团队创造力之间起倒U型调节作用。 相似文献
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In this paper, we study the thermodynamic features of a two-dimensional charged black hole. Weinhold curvature and Ruppeiner curvature are explored as information geometry, respectively. Moreover, based on the Legendre invariant proposed by Hernando Quevedo, the geometro-thermodynamics behavior of this black hole is investigated. 相似文献
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以乙醇为溶剂,呋喃与丙酮在浓盐酸催化下缩合生成2,2,7,7,12,12,17,17-八甲基-21,22,23,24-四氧咵特烯(1)。文献报道了在反应体系中加入Li~+、Mg~(2+)、Ni~(2+)、Mn~(2+)、Co~(2+)、Cu~(2+)、Na~+、K~+等金属盐类对1产率的影响。我们采用固定反应时间、比较1的产率(分离产率,下同)的方法研究了Sn~(2+)、Sb~(3+)、Al~(3+)、Zn~(2+)等金属离子在合成1中的模板效应及阴离子对Li~+、Na~+、K~+的模板效应的影响。 相似文献