油水两相流粘度变化对涡轮流量计测量影响的实验研究

利用涡轮流量计测量了油水两相流动时的混合速度,重点研究了油相粘度变化和流量计入口油水相含率变化对测量精度的影响。实验采用了七种不同的油相粘度(50,160,225,400,700,1100,1450mPa?s),并在含油率0-100%范围内记录了292组不同油水混合流量下的测量值。研究结果表明,当油相粘度为低粘值50和160mPa?s时,涡轮流量计的测量误差较小,且不受入口油相含率的影响,绝对误差均在±5%以内。当油相粘度大于225mPa?s时,随着入口油相含率的增加,误差逐渐增大。当油相粘度进一步提高到1100mPa?s以上时,涡轮流量计在较低的入口油相含率下进入非线性失效区。此外,实验数据还显示,用涡轮流量计测量油水混合流速时,测量结果对油水两相流流型不敏感.

冲击载荷作用下容器壳体动态响应的初步数值研究

本文针对带椭球封头的爆炸容器,黑索今(RDX)在中心处的爆炸用点爆炸模型描述,利用四阶Runge-Kutta法求解一组常微分方程得到爆炸近场的自相似解。采用有限体积形式的PPM格式求解轴对称Euler方程,得到了容器内冲击波传播及其演化的图象。以计算得到的冲击载荷为基础,修改HONDO程序,壳体弹塑性模型采用J_2流动理论描述。对冲击波和壳体的耦合作用进行了初步的数值研究。计算结果表明:容器内爆炸冲击波和壳体中应力波的传播及其演化与物理上的定性分析结果是一致的。由于应力波传播速度较冲击波快,因此,在冲击波未到达的静止流场,流场出现扰动声波,并向中心传播。封头顶点附近出现最大变形。在中等载荷作用下,可忽略壳体变形对流场的影响。

La traducción de Salomé para distintos públicos y escenarios

Raquel Merino Álvarez, José Miguel Santamaría, Eterio Pajares (eds.)

Innovación en la Escuela Universitaria de Estudios Empresariales de San Sebastián

El objeto del presente artículo consiste en realizar una breve exposición de los aspectos innovadores puestos en marcha en la Escuela Universitaria de Estudios Empresariales de San Sebastián recientemente, en relación tanto a aspectos docentes como de gestión.

Survey of fish protective facilities at water withdrawal sites on the Snake and Columbia Rivers

Proliferation of water withdrawals and new pump intake and screen designs has occurred with the growth of irrigated agriculture along the Columbia and Snake Rivers. Concern for the protection of anadromous and resident fish populations resulted in formulation of a survey of the water withdrawal systems. The survey included distribution studies of juvenile fish near pump sites and field inspection of those sites to determine adequacy of screening for protection of fish. A total of 225 sites were inspected in 1979 and 1980, with a follow-up inspection of 95 sites in 1982. Results indicated a definite trend toward lack of concern for the condition of fish protective facilities. Only 4 out of 22 sites not meeting criteria in 1979 had been upgraded to acceptable conditions. Of more concern, 13 of the sites meeting criteria in 1979 were below criteria when reinspected in 1982. Some of the discrepancies included lack of protective screens, poorly maintained screens, and screens permitting excessive velocity that could result in impingement of larvae or small fish. A conclusion from these surveys is that if adequate protection for fish is to exist, screens for water withdrawals need to be properly installed, inspected, and maintained. (PDF file contains 40 pages.)

Estudio de la trabeculectomía experimental mediante implante de PLGA como dispositivo de liberación controlada de fármacos

225 p. : il.

Legislação sobre turismo : dispositivos constitucionais, ato internacional, leis e decretos executivos relacionados ao turismo

Apresenta as normas que dispõem sobre turismo no Brasil: dispositivos constitucionais,leis, decretos, além de ato internacional da Organização Mundial de Turismo. Ao final, apresenta uma lista de outras normas também relacionadas ao tema.

Observations on the purse-seine fishery for Northern bluefin tuna (Thunnus thynnus) in the Eastern Pacific Ocean

ENGLISH: This report presents information on the fishery for bluefin in the northeastern Pacific Ocean derived from purse seiner logbook records and landing statistics. Information on the size composition of the fish in the catch is also presented. The logbook records cover the period 19611980; however, catch statistics and length-frequency data from previous years are also presented. SPANISH: Este informe presenta los datos sobre la pesca del T. thynnus en el Océano Pacífico nordeste, obtenidos de los cuadernos de bitácora de los barcos cerqueros y de las estadísticas de desembarque. Se presenta además la información sobre la composición de talla de los peces en la captura. Los registros de bitácora abarcan el período de 1961 a 1980; no obstante, se presentan además las estadísticas de captura y los datos de la frecuencia de talla de años anteriores. (PDF contains 105 pages.)

Bases para una correcta ordenación del espacio periurbano: proyecto Sudoe

[ES] El programa de cooperación transnacional del Suroeste Europeo aporta la oportunidad de contrastar la situación que atraviesan los espacios periurbanos de cuatro áreas metropolitanas y plantear toda una serie de recomendaciones para su correcta ordenación. Tras varias décadas de crecimiento urbano intenso se observa la dificultad que tienen los documentos de ordenación para regularlo y dirigirlo en los límites de la ciudad. Tan sólo las figuras de protección de espacios naturales aportan ciertas garantías de preservar determinados entornos. Las propuestas se concretan en la necesidad de resaltar el valor natural, de ocio y agrario del medio rural próximo. También se incide en la necesidad de acometer la ordenación de este espacio utilizando una metodología diferente, la mirada invertida, con el objeto de conseguir mayor consenso y respeto a las propuestas de todas las partes.

Una Sesión de Pósters sobre la Química en la vida cotidiana

Capítulo 10 del libro: Guisasola, Jenaro ; Garmendia, Mikel (eds.) "Aprendizaje basado en problemas, proyectos y casos: diseño e implementación de experiencias en la universidad" (ISBN: 978-84-9860-959-2)

Luis Badosa: vida y obra. Aproximación a la obra pictórica a través de su vivencia

487 p. : il., col.

The past history and present trends in the fisheries of Lake Chad

Lake Chad is a very large, shallow eutrophic lake shared by Chad, Nigeria, Niger and Cameroun. It supplies approximately 13% of Nigeria's inland fish. It however lies in an unstable ecological environment characterised by intermittent period of rainfall and drought. This creates a very large draw down area. Consequently, the fisheries are affected by the oscillation in the size of lake due to the drought. Other factors affecting the volume of water are the numerous dams on the inflow rivers. The fishery is also subjected to intense overfishing and may be affected by pollution and other land use practices. The paper discusses changes that took place over the years as a result of the factors of drought, effect of dams on the inflow rivers. The fishery is also subjected to intense overfishing and may be affected by pollution and other land use practices. The paper discusses changes that took place over the years as a result of the factors of drought, effects of dams and overexploitation. Previous records of fish production, species composition and distribution, the status of the fish stocks, their sizes are compared with more recent data. The status of the fishery before and after the contraction of the lake is discussed. Suggestion for a national exploitation of the lake based on habitat improvement, increasing the volume of the water in the lake through controlled use of the influent rivers as well as reduction in overfishing are made