Experimental Study on Surface Deformation and Surface Wave of Fluid Convection with Free Surface

An optical diagnostic system consisting of Michelson interferometer with image processor has been developed for study of the kinetics of thermal capillary convection and buoyancy convection. This optical interferometer has been used to observe and measure surface deformation and surface wave of capillary convection and buoyancy convection in a rectangular cavity with different temperature’s sidewalls. Fourier transformation is used to image processing. The quantitative results of surface deformation and surface wave have been calculated from the interference fringe pattern. With the increasing of temperature gradient, the liquid surface slant gradually. It’s deformation has been calculated, which is related directly with temperature gradient. This is one of the characters introducing convection. Another interesting phenomenon is the inclining direction, which is different when the liquid layer is thin or thick. When the liquid layer is thin, convection is mainly controlled by thermocapillary effect. However, When the liquid layer is thick, convection is mainly controlled by buoyancy effect. Surface deformation in the present experiment are more and more declining in this process. The present experiment proved that surface deformation appears before the appearance of surface wave on fluid convection, it is related with temperature gradient, and the height of liquid layer, and lies on capillary convection and buoyancy convection. The present experiment also demonstrates that the amplitude of surface wave of thermocapillary-buoyancy convection is much smaller than surface deformation, the wave is covered by deformation.

气泡初始尺寸对泡-弹状流型转换的影响

基于气液两相泡状流向弹状流的转换源于气泡合并的机制，利用随机数值模拟方法，对气泡初始尺寸对泡状流向弹状流转换的影响进行了研究。计算结果表明，无量纲气泡碰撞率是一条通用曲线，并由此曲线确定气泡初始尺寸产生影响的区域及其大小，与实验结果的比较令人满意。

The Effect of the Thickness of Fe2 Al5 Phase Layer at Fe/Al Interface on the Mechanics Behavior of Hot Dip Aluminizing Coating

Hot Dip Aluminized Coatings with different thickness were prepared on Q235 steel in aluminum solutions with different temperature for certain time. Through tensile tests and in-situ SEM observations, the effect of the coating's microstructure on the tensile strength of the samples was studied. It was disclosed at certain aluminum solution temperature,transaction layers mainly composed of Fe2 Al5 phase got thicker with time prolonging, and this changed initial crack's extending direction from parallel with to vertical with stretching direction. The change in crack direction decreased tensile strength of samples, thus made the coating easy to break. It was concluded that the existence of thick Fe2 Al5 phase layer was the basic reason for the lowering of tensile strength of the coating.

Destruction of Chemical Agents in a Plasma Reactor with Working Gas of Hydrogen

郑哲敏先生的主要经历与成就——祝贺郑哲敏先生八十华诞

<正>今年10月2日是我们尊敬的郑哲敏先生八十华诞.我们向郑哲敏先生和夫人卢凤才教授表示热烈的祝贺.郑哲敏先生从事科学研究50余年,他既是一位杰出的科学家,又是一位富有远见卓识的科技队伍的组织者和领路人.从20世纪50年代后期到90年代,他为爆炸力学学科的创建和发展做出了创造性贡献.20世纪70年代后期以来,他带领和推动了材料力学性能、非线性力学和海洋工程力学等方面的研究.

Panama City Fisheries Resources Office: FY 2005 Annual Report

HIGHLIGHTS FOR FY 2005 1. Assisted with a study to assess hurricane impacts to Gulf sturgeon critical foraging habitat. 2. Documented Gulf sturgeon marine movement and habitat use in the Gulf of Mexico. 3. Documented Gulf sturgeon spawning with the collection of fertilized eggs in the Apalachicola River, Florida. 4. Documented Gulf sturgeon spawning with the collection of fertilized eggs in the Yellow River, Florida. 5. Assisted with benthic invertebrate survey at Gulf sturgeon marine foraging grounds. 6. Implemented Gulf Striped Bass Restoration Plan by coordinating the 22nd Annual Morone Workshop, leading the technical committee, transporting broodfish, and coordinating the stocking on the Apalachicola-Chattahoochee-Flint (ACF) river system. 7. Over 87,000 Phase II Gulf striped bass were marked with sequential coded wire tags and stocked in the Apalachicola River. Post-stocking evaluations were conducted at 45 sites in the fall and spring and 8 thermal refuges in the summer. 8. Completed fishery surveys on 4 ponds on Eglin AFB totaling 53 acres, and completed a report with recommendations for future recreational fishery needs. 9. Completed final report for aquatic monitoring at Eglin AFB from 1999 to 2004. 10. Completed a field collection of the endangered Okaloosa darter to be incorporated into a status review to be completed in FY06. 11. Provided technical assistance to the Region 4 National Wildlife Refuge (NWR) program on changes to the fishery conservation targets for the region. Also provided technical assistance to four NWRs (i.e., Okefenokee NWR, Banks Lake NWR, St. Vincent NWR, and St. Marks NWR) relative to hurricanes and recreational fishing. 12. A draft mussel sampling protocol was tested in wadeable streams in Northwest Florida and southwest Georgia, and an associated field guide, poster, and Freshwater Mussel Survey Protocol and Identification workshop were completed in FY05. 13. Implemented recovery plan and candidate conservation actions for 14 listed and candidate freshwater mussels in the Northeast Gulf Watersheds. 14. Initiated or completed multiple stream restoration and watershed management projects. A total of 7.5 stream miles were restored for stream fishes, and 11 miles of coastline were enhanced for sea turtle lighting. A total of 630 acres of wetlands and 2,401 acres of understory habitat were restored. 15. Conducted a watershed assessment to develop a threats analysis for prioritizing restoration, protection, and enhancement to natural resources of Spring Creek, Georgia and Canoe Creek, Florida. 16. Continued the formation of an Unpaved Road Interagency Team of Federal, State, and local agencies in Northwest Florida to promote stream protection and restoration from unpaved road sediment runoff. Began the development of a technical committee agreement. 17. Conducted Alabama Unpaved Road Inventory within the Northeast Gulf Ecosystem. Data collection will be completed during FY06. 18. Finalized the development of two North Florida hydrophysiographic regional curves for use by the Florida Department of Transportation (DOT) and others involved with stream restoration and protection. Initiated the development of the Alabama Coastal Plain Riparian Reference Reach and Regional Curves for use by the Alabama Department of Environmental Management (ADEM). 19. Provided technical assistance in collecting data, analysis, and thesis formulation with Troy University, Alabama, to identify the influence of large woody debris in southeastern coastal plain streams. 20. Completed pre- and post-restoration fish community monitoring at several restoration projects including Big Escambia Creek, Magnolia Creek, and Oyster Lake, Florida. 21. Established a watershed partnership for the Chipola River in Alabama and Florida and expanded development and participation in the Spring Creek Watershed Partnership, Georgia. 22. Continued to identify barriers which inhibit the movement of aquatic species within the Northeast Gulf Ecoregion. 23. Completed a report on road crossing structures in Okaloosa darter streams to guide the closure/repair/maintenance of roads to contribute to recovery of the endangered species. In cooperation with Three Rivers RC&D Council, fish passage sites identified in the report were prioritized for restoration. 24. Monitored Aquatic Nuisance Species in the Apalachicola River and tested the sterility of exotic grass carp. 25. Multiple outreach projects were completed to detail aquatic resources conservation needs and opportunities. Participated in National Fishing Week event, several festivals, and school outreach.

Modelo de representación y difusión de cavidades. Cueva de Praileaitz. Deba, Gipuzkoa

[ES] Este artículo está basado en el siguiente proyecto que también puede ser consultado en este repositorio:

Enfoque cartogr??fico de los modelos virtuales de elementos patrimoniales

[ES] Los modelos virtuales de edificios hist??ricos u otros elementos patrimoniales cuentan con una gran variedad de aplicaciones relacionadas, sobre todo, con la difusi??n y multimedia. Aunque en muchas ocasiones se trata de productos eminentemente inform??ticos en los que la componente geom??trica y, por lo tanto topogr??fica, es muy limitada, existen aplicaciones, como los estudios hist??ricos, en los cuales, es necesario que estos modelos representen fielmente la geometr??a y las texturas. En estos casos, los modelos pueden considerarse como productos cartogr??ficos. A continuaci??n se hace una recapitulaci??n de las conclusiones a las que hemos llegado durante los ??ltimos dos a??os despu??s de haber desarrollado una veintena de proyectos en este campo.

Documentaci??n geom??trica de un yacimiento arqueol??gico de gran extensi??n. El ejemplo de Contrebia Leukade (La Rioja)

[ES] La investigaci??n hist??rica en yacimientos arqueol??gicos de grandes dimensiones, requiere de un soporte gr??fico con base geom??trica en el que puedan ser referenciados los hallazgos, reflejadas las ??pocas hist??ricas, planificadas las intervenciones, dise??adas las soluciones constructivas o restauradoras, definidas las zonas afectadas de protecci??n, etc. Al mismo tiempo, la medida supone una parte importante de la propia documentaci??n de los restos arqueol??gicos, que aporta informaci??n cuantitativa de la forma, dimensiones y disposici??n espacial del conjunto del yacimiento y de cada uno de sus elementos constitutivos. La investigaci??n se ve enriquecida por el enlace de las bases de datos gr??ficos y alfanum??ricos. La posterior difusi??n de resultados, tanto a nivel t??cnico como popular, se ven beneficiados por un soporte geom??trico consistente y sobre todo planificado.