创新人才培养"四维度思维模型"研究

文章从理论上进行创新人才培养的"四维度思维模型"的可行性研究,探讨了如何让学生自主进行创造性的思维活动,是建立在创造性思维模型的基础上.以学生为主观条件,从学生自身出发去寻找和学习创新的研究.     

Rupture process of the Wenchuan <Emphasis Type="Italic">M</Emphasis>8.0 earthquake of Sichuan China: the segmentation feature

Moment tensor solution, rupture process and rupture characteristics of the great Wenchuan M8.0 earthquake are studied by using 39 long-period P and SH waveforms with evenly azimuth coverage of stations. Our results reveal that the Wenchuan M8.0 event consisted of 5 sub-events of Mw≥7.3 occurring succesively in time and space. Rupture started with a Mw7.3 introductory strike-slip faulting in the first 12 s, then within 12?40 s, two sub-events with Mw7.6 and Mw7.4 occurred within 80 km northeast from the init...     

Source rupture process of Lushan M S7.0 earthquake, Sichuan, China and its tectonic implications

The source rupture process of the M _S7.0 Lushan earthquake was here evaluated using 40 long-period P waveforms with even azimuth coverage of stations. Results reveal that the rupture process of the Lushan M _S7.0 event to be simpler than that of the Wenchuan earthquake and also showed significant differences between the two rupture processes. The whole rupture process lasted 36 s and most of the moment was released within the first 13 s. The total released moment is 1.9×10¹⁹N m with M _W=6.8. Rupture propagated upwards and bilaterally to both sides from the initial point, resulting in a large slip region of 40 km×30 km, with the maximum slip of 1.8 m, located above the initial point. No surface displacement was estimated around the epicenter, but displacement was observed about 20 km NE and SW directions of the epicenter. Both showed slips of less than 40 cm. The rupture suddenly stopped at 20 km NE of the initial point. This was consistent with the aftershock activity. This phenomenon indicates the existence of significant variation of the medium or tectonic structure, which may prevent the propagation of the rupture and aftershock activity. The earthquake risk of the left segment of Qianshan fault is worthy of attention.     

温室营养液循环系统的动态矩阵控制研究

该文以番茄营养液栽培为例研究温室营养液循环过程控制 ,将动态矩阵控制引入营养液循环过程控制领域 ,并提出一种“模型改造”的方法 :将激励信号引入非自衡对象 ,使其变为一阶稳定系统。试验结果表明 ,动态矩阵控制可以将营养液中的离子浓度控制在设定值 ,具有较好的应用价值     

张北高原土地资源合理利用的探讨

分析了张北高原土地类型分异的自然、经济条件和土地利用类型．对张北高原的土地资源进行了评价并对其合理利用进行了初步探讨．     

Spatial segmentation characteristic of focal mechanism of aftershock sequence of Wenchuan Earthquake

Moment tensor solutions of 88 earthquakes were determined by using the broadband waveform data recorded in six stations within 450 km around the Wenchuan Earthquake sequence by means of the time domain moment tensor inversion method. It was found that the type of the focal mechanism solution is characteristic of obvious spatial segmentation. There are six segments along the main rupture zone from southwest to northeast, where initially the focal mechanism is of main thrust type, finally of main right-lateral strike-slip type and between these two areas there is a transition zone characterized in multiple types of focal mechanisms appearing in turn. Earthquakes of left-lateral strike-slip type perpendicular to the main rupture zone occurred near Xiaoyudong Town. The stress field of each segment is inversed by means of the FMSI program, and it was found that, along the main rupture zone from southwest to northeast, the direction of the maximum principal stress is gradually changing from near EW to NW-SE, and finally changing back to near EW.