中学体育在全民健身活动中的地位

《全民健身计划纲要》（以下简称《纲要》）的实施，这是一件关系到提高全国人民健康水平和全民族素质的大事。实行全民健身计划，是一项在国务院领导下，由国家体委会同有关部门共同推行的依托社会、全民参与的体育活动，是为实现社会主义现代化目标配套的社会系统工程。学校体育是国家体育事业的基础和重点，它在全民健身活动中有着重要的地位和作用。

体育活动在当今社会经济发展中的积极意义

体育活动历经几百年的发展,已在人类的生活中占据了愈加重要的地位,扮演了更加多样的角色,它与经济发展同步,与社会生活相协调,日益多样的活动,与越加积极的参与激情,在21世纪的社会氛围下,更多姿,更绚烂,抛弃了以往仅为单一体育赛事的躯壳,更好的融入了社会经济发展当中去,成为人类更健康,更快乐生活的引导者。

如何有效开展小学数学综合实践活动课教学

2011版数学新课程标准指出:综合与实践的教学,重在综合,重在实践。“重在综合”是指在活动中,注重数学与生活实际、数学与其他学科、数学内部知识的联系和综合应用。应该区别于一般的数学课外活动,是课内与课外的结合。“实践与综合应用”是数学教材新增设的一部分内容,目的是希望通过对这部分内容的学习使学生对已有的数学知识和生活经验加深理解,并通过学生进行独立探索与小组合作探索交流的学习方式,解决一些富有挑战性和综合性的实际问题,让学生解决实际数学问题的能力得到提升与发展。

Accuracy of forecast of mine tremors location

The Upper Silesian Coal Basin is one of the most active mining areas in the world in respect of seismicity. Underground mining in this area takes place in a special environment with a high degree of risk of unpredictable event occurrence. Especially dangerous are phenomena that occur during the extraction of deposits at great depths in the environment of compact rocks. Deep underground mining violates the balance of these rocks and induces dynamic phenomena at the longwall life （in terms of distance） referred to as mine tremors. The sources of these tremors are located in layers characterised by high strength, especially in thick sandstone strata occurring in the roof of the mined seam. In the paper a discussion is presented about the influence of mining intensity （longwall face speed） on the location of mine tremor sources, both in the direction of longwall life （in terms of distance） and towards the surface. The presented material has been prepared basing on the results of tests and measurements carded out at the Central Mining Institute.

Analysis of Tianchi volcano activity in Changbai Mountain,NE China

Changbaishan volcano is the largest potential eruptive volcano in China.In this paper,seismic activity,horizontal displacement,vertical displacement and the fluid geochemistry data acquiring from Changbaishan Tianchi Volcano Observatory(TVO) in recent years are analyzed.The authors discussed the ability for the Changbaishan volcanic seismic monitoring and active level of Changbaishan volcano in recent years based on the fundamental monitoring results.The results show that Changbaishan volcano has experienced an unrest episode from 2002 to 2005,but its active level recovers to the background now.

Relocation of Earthquakes in Shandong and Its Neighboring Areas,China and Its Relationship with Active Tectonics

Earthquakes taking place from 1975 to 2010 in and around Shandong Province are relocated using double-difference(HypoDD)and Hypoinvers 2000(Hypo2000)methods,after correction of the onset times of seismic phases.The results show that the relocated seismicity is clearly associated with regional tectonics in space,and is also in agreement with the existence of deep faults imaged by wide-angle and deep seismic reflection profiling;most of the focal depths are in the range of 5～25km,and there are clearly two predominant depths:10km and 16km,which are inferred to be on the bottom of the upper crust and in the middle crust,respectively.The pattern of seismic activity indicates that moderate and strong earthquakes are likely to occur in the brittle-ductile transition zone between the upper and the lower crust,as the outcome of the deep tectonic dynamic process and the movement and deformation of faults in the upper and shallow crust under the regional stress field.

Analysis on Double-difference Earthquake Location and the Seismicity Pattern of the Yangjiang Earthquake Sequences

The locations of about 400 earthquakes in Yangjiang, Guangdong Province are determined using the double, difference earthquake location algorithm （DDA）. The seismicity pattern becomes concentrated from discrete grids. The rupture characteristics of the Yangjiang earthquake sequence show a conjugated distribution in NW and NE directions. The major distribution trends NE and dips NE with an angle of 30^o and a length of 30km,and the minor distribution trends NW and dips SE with an angle of 30^o and a length of 20km. The focal depth is 5km - 15km. The distribution of the Enping earthquake sequence,which is not far from Yangjiang,is NW-trending. The relationship between hypocenter distribution and geological structure is discussed.

The Acquisition Technique of High-resolution Seismic Data for the Prospecting of Active Faults

The high-resolution shallow seismic technique can be used for more accurately prospecting the position and property of faults and for the preliminary study of fault activity.The author obtains many high quality stack time sections through the prospecting methods of different seismic sources,different group intervals and different observation systems on the Xiadian fault.These sections clearly display the stratum structure and the structure characteristics from several meters to several hundred meters of the Xiadian fault.The resolutions of the different seismic sources,different group intervals and different observing systems are obtained.The prospecting methods and work parameters applicable for goal stratum of different depths and different accuracy requirements are proposed through the analysis of the stack time sections.This lays a good foundation for raising the prospecting resolution of the fault position and the latest active time of the fault.

A Statistical Analysis on Tidal Triggering of Earthquakes in the Kashi-Wuqia Intersection Area in Xinjiang

A statistical analysis on earthquake activity in the Kashi-Wuqia intersection area triggered by earth tide is done by Schusters test and the Permutation test on daily and monthly scales. The north-south,east-west component of the tidal force and tidal body stress are chosen as the tidal curve in the daily scale. The results show that most of the earthquakes occurred near the maximum 0° of the three kinds of tidal curves,the predominant tidal phases of the earthquake are- 5. 86°,6. 60° and- 15. 52°,and the frequency of the earthquakes increases with the increase of the tide; with three kinds of tidal curves( the north-south,east-west component of the tidal force and tidal body stress),the p S of Schusters test for all the earthquakes is 10. 52%,2. 40% and 2. 06%,and the p P of the Permutation test is 10. 90%,2. 40% and 2. 06%,and the results of p S and p P based on the east-west component of the tidal force and tidal body stress are below the threshold of 0. 05 that tidal triggering of earthquakes. In the monthly scale,both the p S and p P are very low( close to 0),far below the threshold of 0. 05 of tidal triggering of earthquakes,and the predominant tidal phase for earthquake triggering is- 18. 95°,close to the maximum 0°( new moon and full moon) of the earth tide in monthly scale. Regarding the statistical test result of tidal triggering of earthquakes,a preliminary explanation is given as to why the trigger effect in the east-west direction is greater than that in north-south direction.

Crustal Movement in the Northern Part of North China Associated with Zhangbei Earthquake

Crustal Deformation Monitoring Center, China Seismological Bureau, Tianjin 300180, China Crustal deformation in the northern part of North China associated with Zhangbei earthquake is analyzed using GPS data collected during 1992, 1996 and 1999, precise re-leveling data collected during 1992, 1998 and 2000, and INSAR result (September 22, 1997～May 6, 1998). The results indicate: ① The vertical deformation is not remarkable since 1992. The vertical crustal deformation in the central and northern part of North China in recent 10 years is of inheritance. The scope of the significant deformation is 15km×15km with a magnitude of 250mm when the event occurred. ② The horizontal deformation is not remarkable in any unit of North China. ③ Before and after the event (1992～1996 and 1996～1999), there is kinematic change of horizontal motion between different units. The activity mode along Yinshan tectonic zone changed from relative static state to left-lateral strike slip; The dominant extensional movement along Shanxi rift zone changed to right-lateral strike slip; Yanshan tectonic zone changed from left-lateral strike-slip with extension to left-lateral strike slip; Yanshan-Hebei transitional zone formed before the event disappeared after the event. ④ The scale of the deformation is closely related to the physical property of media and geological structure environment. Further analysis indicates that ① Zhangbei earthquake does not mean that the earthquake activity begins to be strengthened in North China; ② The crustal movement is normal at present; ③ Next stronger earthquake in North China might be located in Yanshan tectonic zone, especially at its both ends, and Shanxi tectonic zone.

创新家校合作形式 提升亲子阅读成效

随着新课改工作不断深入发展,农村小学教育教学水平也在逐渐提高,但是在取得一定成绩的同时,也存在一定问题需要得到解决,因此本文针对农村小学的阅读教学情况进行研究,在家校合作视角下具体分析农村小学亲子海量阅读成效。首先针对农校小学亲子阅读开展情况进行分析,发现其中的问题,进而提出了打造校本课程、开设培训课程、突出活动地位等提升农村小学亲子阅读成效的具体对策。