高温纯净空气风洞加热技术的应用与发展

介绍了蓄热式纯净空气加热器技术及其运行原理;并针对国外蓄热式纯净空气加热器技术的应用和发展情况展开综述;最后概括总结了蓄热式加热器的加热能力和发展趋势,可为国内高温纯净空气风洞的规划与发展提供一定参考.     

Infrared spectrum of strontium hydroxyapatite

Zusammenfassung Es wird über eine Methode berichtet, die es erlaubt, Apatide zu unterscheiden, in denen anstelle des Calciums Strontium eingetreten ist.

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This investigation was supported by Research Grant DE-02102-02 of the U.S. Public Health Service. I thank Prof.N. Fuson for his interest, encouragement and many helpful suggestions throughout apatite investigation. The IR-spectrum of the sample was run by Mr.K. E. Stine at Beckman Instruments Inc., Fullerton, California, and the X-ray diffraction pattern was done by Dr.R. L. Collin of the University of Rochester, Rochester, New York. The sample was prepared at the Infrared Spectroscopy Institute, Fisk University, Nashville, Tennessee, and the results and discussion parts were completed at Kentucky State College, Frankfort, Kentucky.     

红外物理与技术发展

经过长期探索，人们掌握了红外辐射的基本规律，不断研制出新型，优质红外探测器件，发展了红外光谱和红外成像等重要技术。并使之在当代许多领域，尤其在遥感，军事及其它高科技领域占据突出地位。     

利用共轭梯度法反演钢包内钢液温度分布

为提高钢铁生产中浇铸的命中率,需对钢包内钢液温度进行测量,传统方法是用热电偶直接测量,但热电偶易损坏、成本高,且测点数目有限,不能完全反应钢液温度分布情况。针对上述问题,提出使用共轭梯度法（CGM）反演钢液温度分布。建立钢包的二维稳态传热模型,采用有限元法对钢包传热模型进行离散,获得钢包传热系统温度场;通过构建误差信息最小化函数,建立反演模型,利用CGM对刚包内钢液温度分布情况进行反演。并对某80t钢包模型仿真试验。试验证明,利用上述传热学反问题能够有效的对钢包内钢液的温度分布情况进行辨识,证实了通过传热学反问题方法辨识钢包内钢液温度分布的有效性,为钢包内钢液温度的准确识别提供新的技术手段。     

High resolution of heterochromatin of Drosophila melanogaster by distamycin A

A DNA-binding AT-specific antibiotic, distamycin A, was used as inhibitor of the condensation process of the heterochromatic regions in Drosophila melanogaster embryonic cells. By this treatment the structural organization of heterochromatin at interphase is preserved until metaphase. The different patterns observed are interpreted as chronological steps in the condensation process.     

Infrared emission spectra of in vivo human skin

Zusammenfassung Es wird ein Instrument auf Basis der Interferenzmethode, das häufig wiederholte IR-Spektren summieren kann, entwickelt und zur Spektralbeobachtung der IR-Emission der menschlichen Haut benützt.     

Infrared metaphysics: radiation and theory-choice. Part 2

We continue our discussion of the competing arguments in favour of the unified theory and the pluralistic theory of radiation advanced by three nineteenth-century pioneers: Herschel, Melloni, and Draper. Our narrative is structured by a consideration of the epistemic criteria relevant to theory-choice; the epistemic focus highlights many little-known aspects of this relatively well-known episode. We argue that the acceptance of light-heat unity (and of the unified theory of radiation more generally) in this period cannot be credibly justified on the basis of common evaluative criteria such as simplicity and standard notions of explanatory power. Whether the consensus was justified by some other criteria remains an open question.