利用FTIR指纹图谱研究中药材黄芪

为了寻求简便快速鉴别黄芪不同生长年限和不同产地的新方法,该文采用分辨率高、准确度好,简便快捷、无污染的FTIR光谱法,研究了山西不同产地同一生长年限黄芪FTIR的光谱特征,并与内蒙和甘肃的黄芪作了比较;同时考察了山西同一产地不同生长年限黄芪的FTIR光谱特征。结果表明：22批样品的黄芪共有峰为9处,可用于鉴别黄芪的真伪;差异峰有5处,其峰的数目、形状及相对强度可用于区分黄芪的不同产地和不同生长年限。因此, 可以利用FTIR指纹图谱方便快捷地区分不同生长年限和不同产地的黄芪。     

A two-dimensional lattice hydrodynamic model considering shared lane marking

Lane markings are painted on the ground to permit movement turns along traffic lanes at signalized junctions. Drivers have to follow the guidance to turn different directions to enter different downstream lanes. A new two-dimensional lattice hydrodynamic model is proposed to model the effects of a shared lane marking. The control method is used to analyze the model and new stability conditions are derived. A shared lane marking can divert traffic with different directions to enter different downstream lanes. Under different turning proportion, intensities of traffic at downstream vary. Results show that the traffic diversion could influence the flow stability. Shared lane marking is able to divert traffic flows to different downstream lanes. A feedback control signal is added in the proposed model. Revised stability conditions are obtained using the proposed control method. Numerical simulations present the results for the stability under different traffic conditions.     

Solutions of the modification heating conduction equations of a kind of laser thermal effect

This paper has solved the Chester modified heat conduction equation of the different relaxation time Υ value under different temperature conditions, different boundary conditions and the different initial conditions by different means of methods. These solutions can help to obtain temperature field of laser thermal effects.     

不同产地丹参的紫外光谱鉴别研究

不同溶剂在微波条件下对4种不同产地丹参进行快速提取,用紫外分光光度计对相同溶剂的提取物进行对比研究,发现其紫外光谱存在差异,可用于不同产地丹参的鉴别.     

基于不同色散光纤的光纤链的孤子传输研究

对不同色散光纤组成的光纤链在放大距离内的孤子传输进行了数值和实验研究，结果表明：不同的光纤组合有着不同的结果，因此在孤子传输时存在着合理地组合不同色散光纤的问题，而且即使同一根由不同色散组成的光纤链，当入纤方向了出纤方向交换时，实现孤子传输所需要的能量及孤子传输的稳定性也是不一样的。     

Identifying Functional Modules in Complex Networks

In this paper, we propose a new method that enables us to detect and describe the functional modules in complex networks. Using the proposed method, we can classify the nodes of networks into different modules according to their pattern of intra- and extra-module links. We use our method to analyze the modular structures of the ER random networks. We find that different modules of networks have different structure properties, such as the clustering coefficient. Moreover, at the same time, many nodes of networks participate different modules. Remarkably, we find that in the ER random networks, when the probability p is small, different modules or different roles of nodes can be Mentified by different regions in the c-p parameter space.     

用傅里叶变换红外光谱显微技术鉴定纸张圆珠笔字迹及书写时间

本文运用傅里叶变换红外光谱显微技术,测定了不同圆珠笔在不同纸张上书写字迹油墨的红外光谱,比较了零时间测定和三个月测定的约外光谱,结果表明,不同品牌的圆珠笔字迹的红外光谱是不同的,零时测定和三个月测定的红外光谱也是不同的,讨论了影响书写时间鉴定的因素。     

不同产地杜仲的紫外光谱鉴别研究

利用不同溶剂在微波条件下对于3种不同产地杜仲进行提取,应用紫外分光光度计对相同溶剂的提取物进行研究,发现其紫外光谱有差异,可用于不同产地杜仲的鉴别.     

Mathematical Equation of Fluorescence Intensity for Polydisperse Sols

This paper describes the aging phenomena of colloidal CdS, using fluorescence emission results. It is known that particles of different sizes have not only different absorption spectra but also different fluorescence spectra. This effect is not surprising, because excitation at different wavelengths leads to the excitation of different size particles that do not have the same fluorescence intensity at the wavelength where the fluorescence is recorded.     

Constraining fast radio burst progenitors with gravitational lensing

Fast Radio Bursts(FRBs)are new transient radio sources discovered recently.Because of the angular resolution restriction in radio surveys,no optical counter part has been identified yet so it is hard to determine the progenitor of FRBs.In this paper we propose to use radio lensing survey to constrain FRB progenitors.We show that,different types of progenitors lead to different probabilities for a FRB to be gravitationally lensed by dark matter halos in foreground galaxies,since different type progenitors result in different redshift distributions of FRBs.For example,the redshift distribution of FRBs arising from double stars shifts toward lower redshift than of the FRBs arising from single stars,because double stars and single stars have different evolution timescales.With detailed calculations,we predict that the FRB sample size for producing one lensing event varies significantly for different FRB progenitor models.We argue that this fact can be used to distinguish different FRB models and also discuss the practical possibility of using lensing observation in radio surveys to constrain FRB progenitors.     

Dyson-Wick expansions for nonlinear bose systems

We give the general relation between different values of the equal-time contractions in the Dyson-Wick expansion of the S-matrix and different factor orderings of the noncommuting operators in the interaction hamiltonian. Different orderings lead to different expansions with different Feynman rules.     

Effects on absolute moiré contouring by using gratings with different period and profile and rotating angles

Effects on the absolute moiré contouring systems from using different period and profile gratings and rotating angles are described in this paper. It was found that by choosing a different period of the grating or the rotating angle, different resolution and accuracy of the measurement can be obtained. So, for objects with different height or depth, different period of grating or rotating angle should be chosen to ensure accuracy of the measurement. The square wave intensity grating with small period can be treated as a sinusoidal wave intensity grating in the absolute moiré contouring system. A few objects with different shapes and dimensions have been used as samples to verify the above conclusion.     

金属和玻璃胶合体热膨胀仿真及实验验证

仿真分析了热膨胀系数不同的金属和玻璃胶合体在不同温度下的形变,同时使用热膨胀仪测试了不同金属的热膨胀系数,随后,将热膨胀系数不同的金属分别与相同材料的玻璃进行胶合,最后将胶合体置于半封闭空间并对其整体进行加热,采用哈特曼波前测试系统测试胶合体的形变。结果表明,胶合体的仿真数据和实验数据基本吻合。该仿真与实验结果,对不同材料属性的胶合体在热膨胀匹配设计方面具有一定的指导意义。     

Path integral for equities: Dynamic correlation and empirical analysis

This paper develops a model to describe the unequal time correlation between rate of returns of different stocks. A non-trivial fourth order derivative Lagrangian is defined to provide an unequal time propagator, which can be fitted to the market data. A calibration algorithm is designed to find the empirical parameters for this model and different de-noising methods are used to capture the signals concealed in the rate of return. The detailed results of this Gaussian model show that the different stocks can have strong correlation and the empirical unequal time correlator can be described by the model’s propagator. This preliminary study provides a novel model for the correlator of different instruments at different times.     

多元时间序列复杂网络流型动力学分析

针对气液两相流流动特性,利用有限元分析方法设计变曲率对壁式电导传感器.采用设计加工的传感器在多相流装置上进行气液两相流动态实验,并测得多组对应于不同流型的电导波动信号. 基于测量数据,采用多元时间序列复杂网络构建算法构建对应于不同流型的复杂网络.在此基础上, 对网络的社团特性进行了分析, 研究发现,不同的社团结构对应于不同的流型,而社团内部网络特征可有效刻画不同流型内在动力学特性.多元时间序列复杂网络分析可为两相流流型演化动力学特性研究及流型识别提供新理论、开拓新途经.     

复杂交通运输网络上的拥挤与效率问题研究

本文研究复杂交通运输网络上的拥挤与效率问题. 在无标度网络、随机网络以及小世界网络等不同拓扑结构中, 探讨了不同的能力分配方式和不同的OD (Origin-Destination) 交通需求分布对网络拥挤度和效率的影响. 随着平均交通需求的增加, 分析无标度网络、随机网络以及小世界网络从自由流状态到交通拥堵状态的变化规律. 为便于比较, 本文侧重研究网络拥挤度的倒数, 并将其定义为通畅度. 研究发现网络中的通畅度与效率之间存在线性相关关系, 并且不同网络中的线性比例系数 (或斜率)是不同的, 从而体现了不同网络具有不同的运输性能. 关键词： 复杂网络 拥挤 效率     

纳米通道滑移流动的分子动力学模拟研究

本文采用非平衡分子动力学方法对平板纳米通道滑移流动进行了非平衡分子动力学模拟,获得了不同壁面势能和不同温度时流体的速度分布及密度分布。研究结果表明滑移速度在很大程度上决定于流体温度和壁面吸引力作用强度的大小。由于不同壁面吸引力时流体的密度分布受温度的影响规律不同,使得不同壁面吸引力时流体的滑移速度受温度影响规律也不一致。而且,流体结构受壁面流速的影响要受到壁面势能的制约。     

Synchronization between different motifs

In this paper,we study the synchronization between different motifs.First,the synchronization between two networks with different topology structures and different dynamical behaviours is studied.With the open-plus-closed-loop(OPCL) method,conditions for two different networks to realize synchronization are given.Then based on the theoretical results achieved,the synchronization between different motifs is studied,which verifies the effectiveness and feasibility of the synchronization scheme.     

基于人工神经网络的肉类光谱识别

利用自组的光纤探头式光谱仪对载体肉类表面进行光谱测量,采用反向传播人工神经网络(BP-ANN)对肉类可见光谱进行识别,分析了隐层神经元、期望误差、判别输出范围等网络参数的调整对识别功能的影响.基于大量实测数据样本,优化网络结构参数选择,建立了良好的人工神经网络,对肉类光谱识别率达到97.5%.     

Current and efficiency of Brownian particles under oscillating forces in entropic barriers

In this study, considering the temporarily unbiased force and different forms of oscillating forces, we investigate the current and efficiency of Brownian particles in an entropic tube structure and present the numerically obtained results.We show that different force forms give rise to different current and efficiency profiles in different optimized parameter intervals. We find that an unbiased oscillating force and an unbiased temporal force lead to the current and efficiency,which are dependent on these parameters. We also observe that the current and efficiency caused by temporal and different oscillating forces have maximum and minimum values in different parameter intervals. We conclude that the current or efficiency can be controlled dynamically by adjusting the parameters of entropic barriers and applied force.