Destroyed Railroad Wagon in Mero Laburcz Military; World War I

Bernhard Bardach World War I Album I

werner beert, transportation cars buick Portraits Men

Digital Image

werner bert, mrs proetsch, traansportation cars, buick, ischl Portraits Groups

Digital Image

cars, road to poetschen from goisern Transportation

Digital Image

hallstatt catholic church, transportation cars buick Cities, Towns, and Villages

Digital Image

Street scene with cars; Prague?

Handwritten on verso: Norbert Troller Architect Born Czechoslovakia 1900 died USA 1981

Temple Emanuel (Andover, Mass.) records, 1939-2001; and Part II (addendum), undated 1952-2004

Temple Emanuel was founded in 1920 in Lawrence, Massachusetts. It began by serving a small immigrant Jewish community that has since grown to an affluent and lively congregation of about 600 families. This growth occurred largely under the tenure of Rabbi Harry A. Roth, who lead the congregation from 1962 until 1990 and oversaw the temple’s move to Andover, Massachusetts. This collection includes correspondence, photographs, and sermons.

Speed control of brushed DC motor for low cost electric cars

As petrol prices are going up in developing countries in upcoming decades low cost electric cars will become more and more popular in developing world. One of the main deciding factors for success of electric cars specially in developing world in upcoming decades will be its cost. This paper shows a cost effective method to control the speed of low cost brushed D.C. motor by combining a IC 555 Timer with a High Boost Converter. The main purpose of using High Boost Converter since electric cars needs high voltage and current which a High Boost Converter can provide even with low battery supply.

CARS���超音速燃烧研究中的应用

报道了氮、氧和水的Q支CARS���以及氢的S(5)和S(6)纯转动CARS���测量结果,并用来确定超音速燃烧火焰中的温度及氧的浓度;用水的Q支CARS���得到共振与非共振谱积分面积比随浓度的变化曲线.提出并发展的同时测量氢和氧的CARS���新方法,为同时测量火焰温度和氢、氧浓度提供了一条途径,特别对不含氮的燃烧系统更具重要意义.

Multiplex CARS measurements in supersonic H-2/air combustion

H-2 and O-2 multiplex coherent anti-stokes Raman spectroscopy (CARS) employing a single dye laser has been explored to simultaneously determine the temperature and concentrations of H-2 and O-2 in a hydrogen-fueled supersonic combustor. Systematic calibrations were performed through a well-characterized H-2/air premixed flat-flame burner. In particular, temperature measurement was accomplished using the intensity ratio of the H-2 S(5) and S(6) rotational lines, whereas extraction of the H-2 and O-2 concentrations was obtained from the H-2 S(6) and O-2 Q-branch, respectively. Details of the calibration procedure and data reduction are discussed. Quantification of the supersonic mixing and combustion characteristics applying the present technique has been demonstrated to be feasible. The associated detection limits as well as possible improvements are also identified.

氢／空气预混平面火焰CARS���度测量

介绍了一套用于燃烧研究中对温度和成分浓度测量进行校准的氢／空气预混平面火焰燃烧４系统。采用氮ＣＡＲＳ技术对氢／空气预混平面火焰温度进行了系统的测量，包括不同当量比条件下的温度分布，温度的纵向和横向空间分布。结果表明，氮ＣＡＲＳ测温与氢／空气预混平面火焰的理论计算温度之间的误差为３.４％，而在燃烧炉表面上方１ｍｍ以上的空间属于火焰的温度均匀区，温度的不均匀性约为１.８％。

同时测量氢氧CARS���谱确定火焰温度和氢氧浓度的研究

利用YAG激光器和一台染料激光器同时测量了氢/空气预混平面火焰中氢氧CARS���谱。从氢的S(5)和S(6)支纯转动线的强度比获得火焰温度，并与由氮的CARS���谱得到的温度进行了实验校验。氢和氧的浓度分别由氢的S(6)支和氧的Q支光谱求得，并利用氢/空气预混平面火焰的局部热力学平衡计算对所得浓度进行了校验。温度的校验误差为4%，而氢氧浓度的校验误差分别为14%和12%。

USED CARS���量对撞式扩散火焰的温度分布

介绍了用USED CARS���术测量对撞式甲烷/空气扩散火焰前滞止区和尾流区的温度分布剖面。在滞止区富甲烷观察到甲烷燃烧前的热解过程；尾流区温度高于滞止区温度，表明在滞止区有未完全燃烧的中间产物存在，在尾流区发现C_2及CH的光谱也证明了这一点。