多煤层开采时岩层垮落过程的数值模拟

运用自行开发的岩层破断过程分析 (SFPA2D)系统模拟了多煤层开采时岩层的垮落过程。数值模拟结果表明 ,虽然上部煤柱的存在改变了上覆岩层结构 ,但岩层的垮落仍具有明显的周期性 ,地表的水平移动和垂直下沉仍具有明显的对称性 ;当垮落带高度达到上部煤柱后 ,可能出现大面积的垮落 ,产生较大的次生来压现象 ,从而影响下部长壁工作面的安全。通过和相似材料模拟以及理论分析结果的对比 ,本次数值模拟基本上反映了多煤层开采时采动岩体的动态发展过程 ,SFPA2D系统可以作为模拟采动覆岩破坏过程的一种新方法

加卸载响应比20年及其展望

地震孕育过程是一个非线性、不可逆的过程,震源区介质的加载响应不同于卸载响应,这种加载响应与卸载响应的差别可以定量地刻画地震的孕育过程。基于这个物理概念,提出了一个新的参数加卸载响应比,作为一类地震前兆,用来定量预测强震的发生。在本文中,首先简单回顾了加卸载响应比的发展历史,然后详细介绍了地震震例检验、数值计算、实验研究、地震预测精度、可信度等方面的内容,最后对加卸载响应比的前景进行了展望。

Diário da Constituinte [gravação de vídeo] : [programa n. 196]

Representantes do PMDB, PT, PDT, PCB e PCdoB querem mudar o anteprojeto, por considerá-lo conservador. O Deputado Brandão Monteiro (PDT-RJ) declara que o grupo não aceita diversos pontos, tais como a definição do papel das Forças Armadas, a definição de anistia e o voto distrital. O grupo quer tentar mudar esses pontos através de negociação com o Relator Bernardo Cabral e com as lideranças que estão à frente do trabalho. O Deputado Nelton Friederich (PMDB-PR) considera que, caso não haja consenso, a decisão será por voto no Plenário. O Deputado José Genoíno (PT-SP) diz que o grupo tomou consciência da necessidade de agir em conjunto e da força que possui para atingir seus objetivos. Já tem data a entrega do anteprojeto de Constituição do Relator Bernardo Cabral a Comissão de Sistematização da Assembleia Nacional Constituinte (ANC). O Deputado Bernardo Cabral (PMDB-AM) esclarece que não declarou que há um complô a favor do presidencialismo e fala sobre os retoques no texto, nos tópicos da Anistia e da Reforma Agrária. Na sessão O Povo Pergunta cidadão quer saber quais os critérios que estão sendo usados na Assembleia Nacional Constituinte para uma melhor distribuição de renda. O Deputado Samir Achôa (PMDB-SP) responde que o governo deve dar maior amparo aos aposentados e aos inválidos e que a participação de empregados nos lucros das empresas faria justiça a esses trabalhadores.

Annual report 2000 - North Pacific Marine Science Organization (PICES). Ninth meeting, Hakodate, Hokkaido, Japan, October 20-28, 2000

Report of Opening Session (pdf 42 KB) Report of Governing Council Meetings (pdf 70 KB) Reports of Science Board and Committees: Science Board (pdf 57 KB) Biological Oceanography Committee (pdf 43 KB) Working Group 14: Effective Sampling of Micronekton Advisory Panel on Marine birds and mammals Fishery Science Committee (pdf 31 KB) Working Group 16 on Implications of Climate change to Fisheries Management Marine Environmental Quality Committee (pdf 47 KB) Working Group 8: Practical Assessment Methodology Working Group 15 on Ecology of Harmful Algal Blooms (HABs) in the North Pacific Physical Oceanography and Climate Committee (pdf 41 KB) Working Group 13: CO2 in the North Pacific Implementation Panel on the CCCC Program (pdf 120 KB) BASS Task Team Advisory Panel on Iron Fertilization Experiment MODEL Task Team MONITOR Task Team Advisory Panel on Continuous Plankton Recorder Survey in the North Pacific REX Task Team Technical Committee on Data Exchange (pdf 24 KB) Finance and Administration: Report of the Finance and Administration Committee (pdf 49 KB) Assets on 31st of December, 1999 Income and Expenditures for 1999 Budget for 2001 Report of the Fund-Raising Committee (pdf 20 KB) Composition of the Organization (pdf 27 KB) List of Participants (pdf 94 KB) List of Acronyms (pdf 13 KB)

Annual report 1996 - North Pacific Marine Science Organization (PICES). Fifth meeting, Nanaimo, British Columbia, Canada, October 11-20, 1996

Proceedings of the Fifth Annual Meeting Agenda Report of Opening Session Report of Governing Council Meetings Reports of Science Board and Committees Science Board Working Group 5: Bering Sea (Final Report) Working Group 9: Subarctic Pacific Monitoring Report of the First Meeting Report of the Second Meeting Biological Oceanography Committee Working Group 11: Consumption of Marine Resources by Marine Birds and Mammals Fishery Science Committee Working Group 12: Crabs and Shrimps Marine Environmental Quality Committee Working Group 8: Practical Assessment Methodology Physical Oceanography and Climate Committee Working Group 10: Circulation and Ventilation in the Japan Sea /East Sea and its Adjacent Areas Technological Committee on Data Exchange Finance and Administration Report of Finance and Administration Committee Assets on 31st of December, 1995 Income and Expenditures for 1995 Budget for 1997 Composition of the Organization Officers, Delegates, Finance and Administration Committee, Science Board, Secretariat, Scientific and Technical Committees List of Participants List of Acronyms (Document has 163 pages.)

Flood of September 20-23, 1969 in the Gadsden County area, Florida

The center of low pressure of a tropical disturbance which moved northward in the Gulf of Mexico, reached land between Panama City and Port St. Joe, Florida, on September 20, 1969. This system was nearly stationary for 48 hours producing heavy rainfall in the Quincy-Havana area, 70-80 miles northeast of the center. Rainfall associated with the tropical disturbance exceeded 20 inches over a part of Gadsden County, Florida, during September 20 through 23, 1969, and the maximum rainfall of record occurred at Quincy with 10.87 inches during a 6-hour period on September 21. The 48-hour maximum of 17.71 inches exceeded the 1 in 100-year probability of 16 inches for a 7-day period. The previous maximum rainfall of record at Quincy (more than 12 inches) was on September 14-15, 1924. The characteristics of this historical storm were similar in path and effect to the September 1969 tropical disturbance. Peak runoff from a 1.4-square mile area near Midway, Florida, was 1,540 cfs (cubic feet per second) per square mile. A peak discharge of 45,600 cfs on September 22 at the gaging station on the Little River near Quincy exceeded the previous peak of 25,400 cfs which occurred on December 4, 1964. The peak discharge of 89,400 cfs at Ochlockonee River near Bloxham exceeded the April 1948 peak of 50,200 cfs, which was the previous maximum of record, by 1.8 times. Many flood-measurement sites had peak discharges in excess of that of a 50-year flood. Nearly $200,000 was spent on emergency repairs to roads. An additional $520,000 in contractual work was required to replace four bridges that were destroyed. Agricultural losses were estimated at $1,000,000. (44 page document)

U.S. Favorite, Pedro Miguel Lock - Old Timers Trip through the Canal, Jan. 20, 1928

Leonard Carpenter Panama Canal Collection. Photographs: Views of Panama and the Canal. [Box 1] from the Special Collections & Area Studies Department, George A. Smathers Libraries, University of Florida.

U.S. Favorite, Miraflores Locks - Old Timers trip through Canal. Jan. 20, 1928

Leonard Carpenter Panama Canal Collection. Photographs: Views of Panama and the Canal. [Box 1] from the Special Collections & Area Studies Department, George A. Smathers Libraries, University of Florida.

当代的力学热点——由介绍第20届国际理论和应用力学大会引起的思考

本文通过介绍第２０ 届国际理论和应用力学大会的概况，分析了当代力学发展的现状和热点，并由此提出了对我国力学发展的思考和构想。

微重力落管法制备Nd_(60)Al_(10)Fe_(20)Co_(10)非晶薄片的磁性能研究

采用微重力落管法制得了Nd6 0 Al1 0 Fe2 0 Co1 0 非晶薄片 .利用X衍射 (XRD)分析了Nd6 0 Al1 0 Fe2 0 Co1 0 非晶薄片的结构特征 .用振动样品磁强计 (VSM)研究了其磁性能 .结果表明微重力落管法制得的非晶薄片具有硬磁性 ,与快速非平衡凝固(如甩带法 )试样的XRD相比 ,尽管其曲线还是较为典型的非晶相漫散衍射峰 ,但已有少量的不规则的类似晶化的突起小峰 ,表明该非晶片中已经有微量晶态合金或者细小晶粒析出 ,初步分析可能是生成了类似于亚稳A1 相的短程有序原子团簇或者是较大尺寸的纳米晶 ,这种短程有序原子团簇或纳米晶是Nd6 0 Al1 0 Fe2 0 Co1 0 非晶薄片显示硬磁性的主要原因

Estatuto da igualdade racial : Lei nº 12.288, de 20 de julho de 2010, e legislação correlata

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