测量冷原子温度的理论与近似拟合公式的误差分析

对短程飞行时间法(tim e-of-flight,TOF)中推算冷原子温度的理论拟合公式与近似拟合公式进行了误差分析与比较。研究表明:对于使用短程飞行吸收光谱信号推测冷原子团温度,当探测光光斑半径与冷原子团高斯半径之比k小于0.2时,理论拟合公式和近似拟合公式能很好的相符,随着探测光光斑半径与冷原子团高斯半径比值的逐渐增大,用近似拟合公式所得TOF吸收信号与用理论拟合公式所得TOF吸收信号的误差也将逐渐增大,当比值为0.5时,用近似拟合公式所得TOF吸收信号的误差将增大到20%。     

巷旁充填沿空留巷技术研究

本文通过转Ⅳ喷射机组成的风力充填系统输送矸石——水泥胶凝混合料的巷旁充填研究,介绍了该技术在沿空留巷中应用及效果,并对改进提出了建议。     

短跑技术教学中摆臂动作的研究

对摆臂动作在短跑教学与训练中的作用作初步分析．实验表明，手臂的摆动在短跑中是提高步长与步频的一个重要部分，步长与步频的提高又是提高短跑成绩的重要途径．     

发挥铁路优势吸引短途客流

从铁路短途客流现状、影响铁路短途客流的因素、短途客流下降的原因等方面分析了城市短途旅游运输的几个相关问题，并提出了在既有铁路短途客流密集区段开行“公交化”列车的建议和措施。     

黄山市旅游流网络结构特征研究——团队游与自助游的比较分析

该文以安徽省黄山市为案例地,通过网络获得黄山市团队游与自助游旅游流数据,并借助社会网络分析方法,以时间距离划分长途游客与短途游客,对比分析了黄山市团队游与自助游两种类型旅游流网络结构特征.结果表明：1) 黄山市团队游与自助游网络呈现不同特征.团队游短途旅游规模小且分散,长途旅游规模小而集中.自助游短途旅游规模广而密,长途旅游规模广而分散.2) 黄山市旅游流具有比较明显的核心-边缘结构,核心区与边缘区联系不紧密,且团队游分层特征强于自助游.3) 团队游更加依赖核心节点,而自助游中各景点联系紧密且均衡.基于此,从目的地管理角度分别对黄山市内外部旅游网络结构优化提出建议.黄山市旅游流网络结构基本稳定,且与高级别、强吸引力的“标志性”城市旅游资源区位之间存在着强稳定的空间关联关系,这应该也是未来判断一个旅游目的地是否为成熟型旅游目的地的重要标准.     

回采巷道螺纹钢锚杆支护新技术的应用

介绍了回采巷道螺纹钢锚杆支护新技术在古书院矿9#煤回采巷道的应用情况，并就其应用效果进行了分折和评价。     

Fluorescent Probes and Quenchers in Studies of Protein Folding and Protein-Lipid Interactions

Fluorescence spectroscopy provides numerous methodological tools for structural and functional studies of biological macromolecules and their complexes. All fluorescence-based approaches require either existence of an intrinsic probe or an introduction of an extrinsic one. Moreover, studies of complex systems often require an additional introduction of a specific quencher molecule acting in combination with a fluorophore to provide structural or thermodynamic information. Here, we review the fundamentals and summarize the latest progress in applications of different classes of fluorescent probes and their specific quenchers, aimed at studies of protein folding and protein-membrane interactions. Specifically, we discuss various environment-sensitive dyes, FRET probes, probes for short-distance measurements, and several probe-quencher pairs for studies of membrane penetration of proteins and peptides. The goals of this review are: (a) to familiarize the readership with the general concept that complex biological systems often require both a probe and a quencher to decipher mechanistic details of functioning and (b) to provide example of the immediate applications of the described methods.     

基于无线监控网络的智能输液系统设计

介绍一种非接触式红外温度传感器检测管路内药液温度的方法和智能输液装置的动力、加热和安全监控模块的系统组成,详细分析了红外温度传感器在输液过程的监测作用和高精度反馈控制原理;介绍了ZigBee模块与输液装置监控系统的接口电路,分析了利用ZigBee技术实现输液中心无线传感器网络的组网原理;解决了安装布线、治疗过程无人值守、护士多点监管等难题,实现了中心监控、移动监测,安全警示与应急处置相结合的综合管理功能,提升了医护人员的工作效率,大大降低了治疗安全风险.     

论“各司其职、各守其分”的平等

“各司其职,各守其分”是柏拉图设计的正义的等级社会的理想图景,试将反其道而用之,将它与平等联系起来,在论证“各宜其职”的前提下,构建一个相对平等的“各司其职,各守其分”的社会模式。     

Studying edge effects near rectangular mine workings weakened by a crack

Edge effects in a rock mass near a system of periodic mine workings crossed by a crack (fold fault) are considered. The stress state near the mine workings is determined by solving an elastic problem using the piecewise-homogeneous medium model. The original differential problem is reduced to a discrete problem based on the concept of a base scheme. Methods are proposed to solve the discrete problem, and the issue of optimizing the numerical analysis is discussed. The stress distribution around mine workings is analyzed. The stress isolines that represent the boundaries of edge effect zones and indicate their maximum decay length are plotted __________ Translated from Prikladnaya Mekhanika, Vol. 44, No. 1, pp. 74–78, January 2008.