Counterfactual Quantum Deterministic Key Distribution

We propose a new counterfactual quantum cryptography protocol concerning about distributing a deterministic key.By adding a controlled blocking operation module to the original protocol [T.G.Noh,Phys.Rev.Lett.103(2009) 230501],the correlation between the polarizations of the two parties,Alice and Bob,is extended,therefore,one can distribute both deterministic keys and random ones using our protocol.We have also given a simple proof of the security of our protocol using the technique we ever applied to the original protocol.Most importantly,our analysis produces a bound tighter than the existing ones.     

C语言在密立根实验数据处理中的应用

用密立根油滴仪测油滴的电荷,求基本电量,及验证电荷量子性的实验是大学物理实验的经典实验。实验采用倒过来验证法,数据多,计算量较大,本文探讨使用C语言编程来处理实验数据。     

光谱法锌离子检测系统的研究

采取标准锌显色剂与锌发生显色反应,生成不溶于水的絮状络合物。用光谱仪测它的吸光度,研究其特征谱与吸光度的特点,建立其浓度与特征波长吸光度间的数学模型。本文所采用的显色剂主要与锌、铜、镉、镍四种离子发生络合反应。因此分别探索了四种离子高浓度以及低浓度时显色反应的吸光度,最终通过得到锌离子浓度与吸光度的关系式以及锌离子浓度与四波长下四种离子混合溶液显色后的吸光度的关系式,给出了锌离子的吸光度与总吸光度的关系式。显色反应能否满足分光光度法的要求,主要与显色剂的性质有关,同时显色反应的条件也至关重要。因为在显色反应过程中,主要是锌离子与锌显色剂发生络合反应形成络离子,进而形成絮状络合物。络离子一般比较稳定,但在水溶液中也存在着电离平衡,也就是说当显色条件发生变化时,既有可能形成络离子,也有可能发生络离子的分解,从而影响络合反应的程度。显色条件包括显色剂用量、pH值、反应温度、显色时间、待测溶液的盐度以及浊度等。重点研究待测溶液的盐度对锌离子浓度测量值的影响,并通过实验给出影响规律以及校正模型。     

基于显微拉曼光谱的稀酸预处理马尾松细胞壁解构机理研究

稀酸预处理可打破木质纤维原料天然抗降解屏障,提高后续酶解和发酵效率,从而使其更高效地转化为生物燃料,然而在亚细胞水平上纤维细胞壁的解构机理仍有待深入研究。采用共聚焦显微拉曼光谱技术与主成分聚类分析法结合,研究了稀酸预处理前后马尾松细胞壁区域化学变化特点。结果表明,累计贡献率高达94.61%的第一与第二主成分空间中光谱样本散点呈现规律性分布;聚类分析可准确提取细胞壁不同形态区域平均拉曼光谱。结合拉曼成像分析发现,细胞角隅木质化程度高,含有较多木质素,次生壁木质化程度低,含有较多碳水化合物。稀酸预处理导致马尾松细胞壁发生了不均一解构,其致密空间结构被破坏,次生壁中碳水化合物典型特征峰2 890 cm-1处信号强度降低了26.9%,表明碳水化合物从该区域大量脱除;碳水化合物在复合胞间层少量脱除,而细胞角隅则出现了其轻微富集。木素在稀酸预处理后发生了重新分布,细胞角隅区拉曼信号显著增强。碳水化合物(主要为半纤维素)的溶出及木质素的重新分布削弱了生物质原料的抗降解性,有利于后续酶解糖化。该研究不仅提供了一种快速、高效的纤维细胞壁区域化学分析方法,还为林木生物质高值转化的研究奠定了重要的理论基础。     

Generating ultra wide low-frequency gap for transverse wave isolation via inertial amplification effects

Low-frequency transverse wave propagation plays a significant role in the out-of-plane vibration control. To efficiently attenuate the propagation of transverse waves at low-frequency range, this letter proposed a new type phononic beam by attaching inertial amplification mechanisms on it. The wave propagation of the beam with enhanced effective inertia is analyzed using the transfer matrix method. It is demonstrated that the low-frequency gap within inertial amplification effects can possess much wider bandwidth than using the local resonance method, thus is more suitable for designing applications to suppress transverse wave propagation.     

Atomic parity non-conservation: the francium anapole project of the FrPNC collaboration at TRIUMF

We present a method for measuring the nuclear anapole in a string of francium isotopes. The anapole is a parity non-conserving electromagnetic moment that enables parity-forbidden transitions between ground state hyperfine levels of an atom. The experiment is run by the FrPNC collaboration and relies on a beam of artificially-produced francium from the ISAC facility at TRIUMF.     

300MeV质子同步加速器概念设计优化（英文）

目前处于设计阶段的哈尔滨工业大学空间辐照效应装置,其核心部件是由1台10 MeV的注入器、1台300MeV的同步加速器以及输运线构成的加速器装置。同步加速器中引出的质子束流被用于辐照研究。基于装置的概念设计,优化了其同步加速器部分的设计。设计了新的磁聚焦结构,优化了基于新的磁聚焦结构的多圈注入系统的凸轨变化模式,提高了注入效率。为了更好地优化引出束流的时间结构,慢引出系统采用了RF knock-out的方法。为了满足精准辐照的要求,研究了RF Kicker的频率调制,发现RF Kicker的双频调制能使得引出束流更均匀。A research complex for aerospace radiation effects research is in the designing stage in Harbin Institute of Technology. Its core part is a proton accelerator complex, which consists of a 10 MeV injector, a 300 MeV synchrotron and beam transport lines. The proton beam extracted from the synchrotron is utilized for the radiation effects research. Based on the conceptual design, the design study for optimizing the synchrotron has been done. A new lattice design was worked out, and the decreasing pattern of the bump of the multi-turn injection system was optimized to increase the injection efficiency. In order to improve the time structure of the extracted beam, a RF knock-out method is employed in the slow extraction system. To meet the requirement of accurate control of dose, the frequency modulation of the RF kicker is well investigated, and the dual frequency modulation has been found to have a better performance for a uniform spill.     

S为1/2体系粉末或冷冻玻璃态电子自旋共振谱的模拟

本文较详细地介绍了模拟s为1/2体系粉末或冷冻玻璃态电子自旋共振谱的理论基础。给出了具体计算公式,利用这些公式完全可以在微机上进行计算机模拟电子自旋共振谱。