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.     

Reaction of anhydrides of dicarboxylic acids of six-membered nitrogen heterocycles with CH-acid compounds

Condensation products with azaphthalidylidene structures were obtained by the reaction of anhydrides of cinchomeronic and pyrazine-2,3-dicarboxylic acids with malonic ester, thiazolidine-2,4-dione, N-phenylthiazolidine-2,4-dione, and rhodanine. Azaindan-1,3-dione derivatives were synthesized with cyanoacetic ester and malononitrile under the same conditions. The reaction of these anhydrides, as well as quinolinic acid anhydride, with - and -methylquinolines, as well as 2,6-lutidine, gave compounds that have azaphthalidylidene structures, which were converted to azaquino- and pyrophthalones by the action of sodium methoxide.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1127–1131, August, 1981.     

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.     

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。     

壁面热特性对超声速燃烧室热环境的影响

在分析燃烧室壁面的对流-辐射耦合换热特性基础上,考虑燃烧室热环境与冷却系统间的相互关系,提出了一种以燃烧室材料许用温度为约束的非均匀冷却壁面热特性设计方法.以某型超声速燃烧室为例,采用混合分数平衡化学反应和液滴离散相模型,计算分析了壁面热特性对燃烧室壁面热流构成、热环境及冷却系统热负荷的影响.结果表明,壁面热特性对超声速燃烧室热环境的影响值得重视,非均匀冷却壁面热特性设计能有效减少燃烧室热损失.     

多孔氧化铝模板制备ZnS纳米线阵列及其光致发光谱

利用阳极氧化铝（AAO）模板,采用电化学沉积方法制备出了ZnS纳米线阵列。扫描电子显微镜（SEM）结果显示,AAO模板孔洞分布均匀,孔径基本一致（约50nm）,孔口呈六边形。TEM结果显示硫化锌纳米线的直径约50nm（与AAM模板孔径一致）,长度约为20μm（与AAM模板厚度一致）。电子衍射结果表明ZnS纳米线为多晶结构。比较了AAO模板组装ZnS纳米线阵列前后的光致发光谱,所得光谱显示,组装了ZnS纳米线阵列的模板的光致发光谱比没有组装的空模板相比多出两个发射峰,分别位于409,430nm,且其发光强度随激发波长的增长而增强。解谱分析表明,这即为ZnS纳米线阵列的发光光谱的两个发射峰,是由导带与受主能级间的跃迁发光和施主与受主能级间的复合跃迁发光共同作用所致。发现由于纳米线尺寸的单一性,发射峰窄化明显,半峰全宽较小,这种现象在其他文献中未曾报道过。