排序方式： 共有151条查询结果，搜索用时 187 毫秒
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本文针对矿山流体机械课程的特点,结合教学实践及教学现状,在教学过程中采取提出问题—解决问题—师生互动—归纳与习题的运行结构,激发学生的学习兴趣,使学生获得系统知识,取得较好的教学效果。 相似文献
103.
Mann R. 《浙江大学学报(A卷英文版)》2005,6(12):1379-1385
Body-scanning exploiting 3-D imaging has revolutionised diagnostics and treatment in medicine. Process engineers would like
to be similarly able to image chemical process units in 3-D, but without the ￡multi-million price tag. UMIST and Leeds University
have together, through the Virtual Centre for Industrial Process Tomography (http://www.vcipt.org), pioneered several electrical
process tomography techniques and used them in a variety of applications. Illustrations are presented to show how electrical
resistance tomography (ERT) has been developed for typical stirred vessels widely encountered in batch process manufacturing.
The technique is potentially fast and inexpensive and capable of imaging both dynamic and pseudo-stationary processes. Examples
from UMIST's two-tonne vessel will be presented for miscible tracer mixing, as well as gas-liquid and solid-liquid mixing. 相似文献
104.
郭洁 《和田师范专科学校学报》2007,27(6):9-10
两汉时期是中国古代士人政府的形成时期．而作为两汉选举制度主要组成部分的察举制度在士人政府的形成过程中发挥了重要的作用。在察举制度下，士人经历了从游士到儒士再到士大夫的演变过程，作为政府主要力量的士大夫阶层最终形成。 相似文献
105.
采用理论分析、解析、数值模拟等多种手段,研究网格不匹配度对计算精度的影响.设计了一种具有精确解的多次激波冲击压缩计算模型,使用二维弹塑性流体动力学有限元程序进行了大量的数值模拟.通过比对数值模拟结果与精确解的差异,半定量地给出了网格不匹配度对计算精度的影响,其结果对复杂物理计算中网格最大不匹配度的确定有一定的指导意义. 相似文献
106.
二阶微分包含三点边值问题解的存在性 总被引：2，自引：0，他引：2
翟新平 《喀什师范学院学报》2007,28(3):16-18
运用Bohnenblus-Karlin不动点定理研究如下二阶微分包含三点边值问题x″∈F(t,x,x′),t∈[0,1]x′(0)=0,x(1)=αx(η)解的存在性. 相似文献
107.
WILLIAMS R.A. SELOMULYA C. JIA X. 《浙江大学学报(A卷英文版)》2005,6(12):1367-1373
INTRODUCTION Separation of solids from suspending liquid plays a crucial role in a variety of processes, from nanomaterials synthesis to bio-processing. It often involves colloidal particles that need to be aggregated into more manageable sizes. Characteristics of these aggregates influence downstream solids recovery. For instance, aggregates with open configurations may settle slower than those with denser structures due to increasing fluid drag, although considerable flow- through could… 相似文献
108.
Geochemical characteristics of the fluid inclusions in the Gangxi Fault Belt, Huanghua Depression, Bohai Bay Basin, China 总被引：2，自引：0，他引：2
DING Wei-wei DAI Jin-xing CHU Feng-you HAN Xi-qiu 《浙江大学学报(A卷英文版)》2007,8(7):1011-1020
We studied the geochemical characteristics of the fluid inclusions in the Ordovician carbonates and the Oligocene Shahejie Formation sandstones from 15 wells in the Gangxi Fault Belt, Huanghua Depression. The fluid inclusions are all sec- ondary with gas/liquid ratio of 5%~10%. Base on Raman they are mainly composed of H2O, CO2 and CH4. The homogenization temperatures, combined with burial and geothermal history of the host rock, indicate that the fluid flows in the Shahejie Formation and the Ordovician carbonates were trapped in Neocene. Using a VG5400 mass spectrometer, the helium isotopic compositions were analyzed. Interpretation of results suggested a significant amount of mantle-derived helium mainly accumulating in the intersections of the NWW trending Xuzhuangzi and NE trending Gangxi faults. The maturity of hydrocarbon decreases from the intersection to the outside pointing out that the fluid related to the NWW trending Xuzhuangzi and NE trending Gangxi faults. These factors implied the fluid inclusions have a close relationship to the local tectonic setting. Gangxi Fault Belt experienced intensive Neo-tectonic activities in Cenozoic. Widespread faulted-depressions and strong volcanic eruptions manifested its tec- tonic status of extensional stress field. Mantle uplift caused the movement of magma that carried mantle-derived gases and deep heat flows, the deep-rooted tension faults provided the passages for the gases and heat flows to shallow crust levels. 相似文献
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翟新平 《黔南民族师范学院学报》2006,26(6):21-23,42
本文运用Leray-Schauder原理研究障碍带条件下二阶微分包含两点边值问题x″∈F(t,x,x′),t∈[0,1]x(0)=A,x(1)=B解的存在性. 相似文献
110.
流体力学是中国矿业大学安全工程专业的一门研究生必修基础课程。从安全工程学科"双一流"建设的需求出发,优化课程教学体系,建立应用型特色流体力学教学案例库,并开展了案例教学。教学实践证明,应用型特色流体案例库扩充了流体力学的教学资源,使研究生课堂教学与安全工程领域的科研问题紧密结合起来,激发了研究生学习的兴趣,强化了课程学习对研究生科研素养的培养,满足了优势学科的发展需求,对矿业工程等专业的类似课程教学改革亦有一定的推广价值和借鉴意义。 相似文献