ICP-MS测定章松八味沉香散中的微量元素

采用电感耦合等离子体-质谱法（ICP-MS）分析藏药章松八味沉香散中铬、钴、铜、锰、锌、钼、铁、镍等8种微量元素的含量,其中铁、铜、镍、锰含量较高,其他元素含量较低,藏药章松八味沉香散中元素的分布特点与章松八味沉香散具有消心热、宁心安神、行气降压之功效有关,为现代用药提供了参考数据。     

ISLE实验简介及其对物理实验教学的启示

美国ISLE实验教学方式在充分利用物理实验来培养学生的科研能力和创新能力方面具有很大的借鉴价值. 为此,详细介绍了ISLE实验教学的特点、培养目标、类型及等级的评价标准. 同时,提出了该教学方式对我国物理教学的启示.     

微波消解石墨炉原子吸收光谱法测定水产品中镉

采用微波消解样品,石墨炉原子吸收光谱法测定水产品中镉。在最佳试验条件下,镉的线性范围为0—2μg·L-1,检出限为1.3pg。相对标准偏差为1.9%—3.1%,本方法简便,快速、准确。     

以HMX为基的两种压装高密度炸药的燃烧转爆轰实验研究

 为研究以HMX为基的固体高能炸药的燃烧转爆轰性能,采用同轴电探针和压力传感器测试技术对常用的A、B两种压装高密度高能炸药开展燃烧转爆轰实验,研究装药组分和约束条件对压装高密度炸药燃烧转爆轰性能的影响。实验结果表明：这两种压装高密度炸药难以发生燃烧转爆轰;在强约束条件下（45号钢,内径25.4 mm、外径65 mm、长度600 mm）,A压装炸药（HMX质量分数为95%,密度为1.86 g/cm³）基本实现了燃烧转爆轰,爆轰诱导距离约为545 mm;在相同的实验条件下,A压装炸药比B压装炸药（HMX质量分数为87%,密度为1.84 g/cm³）更易于发生燃烧转爆轰,即A压装炸药的安定性相对较差。     

嫦娥一号卫星干涉成像光谱仪电子学设计

介绍了嫦娥一号卫星用于获取矿物光谱信息的干涉成像光谱仪电子学系统设计.概述了电子学系统的技术指标、系统组成、工作模式、外部接口和设计原则,详细描述了焦平面组件设计、视频处理和时序控制组件设计和EMC设计,给出部分正样产品实物照片以及地面实验和在轨飞行图像.各项地面试验和一年的在轨飞行结果表明该设计达到了预定的技术要求.     

40 Gb/s差分相移键控格式抗偏振模色散的性能研究

研究了40Gb/s非归零或归零格式下,差分相移键控和开关键控信号对一阶偏振模色散的影响.比较分析了不同偏振模色散影响下的各种调制格式的眼开度.结果表明:使用非归零和归零格式,在一阶偏振模色散情况下,差分相移键控信号均比开关键控信号有更高的眼开度;与归零差分相移键控格式相比,非归零差分相移键控格式受偏振模色散影响眼开度要小;对于给定的比特率,载波抑制归零差分相移键控格式比归零差分相移键控格式有更好的抗偏振模色散能力.     

一种高速多通道光纤阵列光开关

为了对短时间大视场一维光强信息进行采集,采用编码转换技术和自聚焦透镜矩形阵列设计了光开关,用小口径电光晶体实现了大视场的测量.采用MOS管级联的高压同步电路,使得系统具有结构紧凑、性价比高、寿命长等优点.实验结果表明:开关选通时间100±5 ns,前后沿小于25 ns,消光比1 100∶1.     

A New Solution to Detectable Byzantine Agreement Problem

We present a new quantum protocol for solving detectable Byzantine agreement problem between three parties by employing one quantum key distribution protocol. The protocol is suggested by a special four-qubit entangled state instead of singlet states, which shows that singlet states are not necessary to achieve detectable Byzantine agreement.     

Formation of Hot Images in Laser Beams through a Self-defocusing Kerr Medium Slab

A nonlinear hot image is usually thought as of a special case of self-focusing, and thus occurs when a laser beam propagates through a slab of self-focusing medium. Here we show theoretically that a hot image may also be formed by a thin slab of self-defocusing medium. The physical origin for this hot image formation is akin to the in-line volume-phase holographic imaging due to the intensity-dependent refractive-index modulation of the self- defocusing medium. NumericM simulations confirm the theoretical prediction and further identify the dependence of the hot image on the beam power, the modulation depth of obscuration and the thickness of self-defocusing medium. The analysis presented here brings new insight into the physics of hot image formation in the high power laser system.     

Sexually Transmitted Diseases on Bipartite Graph

We study the susceptible infected-susceptible （SIS） epidemic model on bipartite graph. According to the difference of sex conception in western and oriental nations, we construct the Barabasi Albert Barabasi Albert （BA-BA） model and Barabasi-Albert Homogeneity （BA-HO） model for sexually transmitted diseases （STDs）. Applying the rate equation approach, the positive equilibria of both models are given analytically. We find that the ratio between infected females and infected males is distinctly different in both models and the infected density in the BA-HO model is much less than that in the BA-BA model. These results explain that the countries with small ratio have less infected density than those with large ratio. Our numerical simulations verify these theoretical results.