电容应变式压力传感器原理及检测电路设计

论述了电容应变式压力传感器的原理，给出了一种电容应变式压力传感器的电路，并分析了压力大小与电路输出电压之间的关系。     

A General Random Walk Model of Molecular Motor

A general random walk model framework is presented which can be used to statistically describe the internaldynamics and external mechanical movement of molecular motors along filament track. The motion of molecular motorin a periodic potential and a constant force is considered. We show that the molecular motor‘s movement becomesslower with the potential barrier increasing, but if the forceis increased, the molecular motor‘s movement becomesfaster. The relation between the effective rate constant and the potential barrier‘s height, and that between the effectiverate constant and the value of the force are discussed. Our results are consistent with the experiments and relevanttheoretical consideration, and can be used to explain some physiological phenomena.     

蜡烛火焰三维温度场重建实验研究

本文在实验室中以蜡烛火焰为研究对象,研究采用辐射图像处理技术重建蜡烛三维温度场。并采用细丝热电偶实测火焰局部温度,对蜡烛火焰三维温度场可视化的结果进行了比较。结果表明,火焰高温区的重建温度是合理的,此方法能够很好地重建单峰、双峰三维温度分布。进一步证实了基于火焰图像处理技术实现三维温度场可视化的可行性。     

Obstacle Effects on One-Dimensional Translocation of ATPase

We apply a general random walk model to the study of the ATPase‘s one-dimensional translocation along obstacle biological environment, and show the effects of random obstacles on the ATPase translocation along single stranded DNA. We find that the obstacle environment can reduce the lifetime of ATPase lattice-bound state which results in the inhibition of ATPase activity. We also carry out the ranges of rate constant of ATPase unidirectonal translocation and bidirectional translocation. Our results are consistent with the experiments and relevant theoretical consideration, and can be used to explain some physiological phenomena.     

A Novel Fabrication Technique of Long Period Fiber Gratings

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Observation of superstructure formation on Rh{001} by laser-pulse assisted field evaporation

Pulsed-laser assisted field evaporation of the Rh{001} plane produces a p(2 × 2) structure. This structure can be destroyed by pulsed-laser heating the surface in the absence of an applied field, and can be restored to near perfection if the pulsed-laser heating is done in an applied field of 3 to 4 $\text{V}\text{A}\text{?}$. The degree of order increases with the applied electric field. The observed p(2 × 2) surface is therefore a field stabilized structure.     

亚波长闪耀光栅矢量衍射效率计算

将矢量衍射数值算法—严格耦合波分析用于精确计算亚波长闪耀光栅的衍射效率,并分析其衍射特性。建立了闪耀光栅的电磁介质模型,并将楔形不规则结构简化为多层矩形光栅结构,通过电磁场的介质分布建立严格耦合波方程。根据边界条件求解出各层的电磁场分布,再通过增透矩阵方法将各层电磁场依次迭代,求解出了整个结构的衍射效率。计算分析显示,对闪耀角为11.3°、周期为500 nm的金属铝闪耀光栅可以得到高于90%的衍射效率和相应的闪耀级次。实验表明这种矢量衍射数值算法具有较高的准确性,可以推广应用于高致密刻线复杂光栅的衍射计算分析。     

Quantum Anti-Zeno Effect in Artificial Quantum Systems

In this paper, we study a quantum anti-Zeno effect （QAZE） purely induced by repetitive measurements for an artificial atom interacting with a structured bath. This bath can be artificially realized with coupled resonators in one dimension and possesses photonic band structure like Bloeh electron in a periodic potential. In the presence of repetitive measurements, the pure QAZE is discovered as the observable decay is not negligible even for the atomic energy level spacing outside of the energy band of the artificial bath. If there were no measurements, the decay would not happen outside of the band. In this sense, the enhanced decay is completely induced by measurements through the relaxation channels provided by the bath. Besides, we also discuss the controversial golden rule decay rates originated from the van Hove＇s singularities and the effects of the counter-rotating terms.     

基于GA-ELM的水上交通事故严重程度影响因素识别研究

水上交通事故严重程度影响因素的识别对从根本上减少严重事故件数、降低事故危害和损失具有重要意义。在历史事故报告的基础上,构建并量化事故影响因素集,提出以极限学习机(ELM)为一般事故、严重事故的二分类器,以遗传算法(GA)为因素搜索算法的GA-ELM因素识别模型。对发生在我国水域的737件水上交通事故进行实证研究,并与以支持向量机(SVM)为分类器的GA-SVM模型进行对比分析。结果表明,GA-ELM模型识别出时段、人为致因、环境致因等9个事故严重程度影响因素,较GA-SVM模型结果更为精简,且分类精度较不做因素识别时分别提高8.2%、7.1%。此外,GA-ELM大大缩短运算时间。由此可见,GA-ELM可为水上交通事故严重程度影响因素识别提供一个较好的方法。     

电化学免疫传感器检测TET1蛋白

基于Ten-eleven translocation 1(TET1)蛋白催化5-甲基胞嘧啶(5-Methylcytosine,5mC)生成5-羟甲基胞嘧啶(5-Hydroxymethylcytosine,5hmC),结合5hmC抗体的免疫识别反应,建立了一种电化学分析方法用于TET1蛋白的特异性检测.以金纳米颗粒(Au...