论文电影与图像分裂——德勒兹电影理论中的戈达尔

通过阐释德勒兹论述戈达尔的具体文本,也将德勒兹电影理论与论文电影的研究相连,本文希望一方面展现戈达尔的蒙太奇手法及其历史在德勒兹理论谱系中的位置,并试图将德勒兹论电影与论绘画的相关概念进行类比,另一方面也进一步深入理解论文电影的创作特征与发展方向,并在此启发下寻找一种在绘画与电影、图像与影像间跨越门类与学科的研究可能。

一种基于遗传算法的图像区域合并分裂方法

在分析图像的区域分裂合并分割法与自适应遗传算法特点的基础上,提出了将自适应遗传算法应用于图像分割的思路与方法,论证了该方法的可行性,并给出了具体的算法流程。

细胞分裂图像的判定

本文运用物理模型进行比较分析，得出减Ⅰ分裂、减Ⅱ分裂和有丝分裂的前期、中期、后期和末期的细胞分裂图像的准确判定口诀。

FFBP算法在合成孔径声纳成像中的应用

时域合成孔径成像算法可以更好地适应多子阵造成的方位向采样不均匀问题,并且具有存储空间小、并行处理方便的优点。但精确时域算法运算量非常大,快速分块反向传播投影(Fast Factorized Back Projection,FFBP)成像算法则可以大大降低成像计算量。详细分析了FFBP声程误差的距离效应、孔径合并策略和图像分裂策略、成像的计算量等关键问题,并给出了仿真和实测数据成像结果。通过对仿真和实测成像结果的分析表明:FFBP算法可以提高计算效率,适用于实时合成孔径声纳成像系统。

例谈变构学习模型在生物复习课中的运用

以“细胞分裂图像”一节课为例,从创设情境、问题设置——组学探疑、答疑解惑——活动体验、梳理知识——归纳方法、指导学法四个方面将变构学习模型运用于生物复习课,始终围绕“想学生之难、找解决之法”,旨在帮助学生和教师提高复习课效率.

The effect of the fracture distribution on CO_2 injection into a coal seam

The effect of the fracture distribution on CO 2 injection into coal seams was studied with a heterogeneous model having dual porosity to represent both the primary medium (the coal matrix) and the secondary medium (the fractures) under variable stress conditions. A numerical generation method and a digital image processing method were used to model the heterogeneous fracture distribution in the coal. The model solutions demonstrate that: (1) the fractures are the main channel for gas flow and their distribution has an important impact on the gas injection rate; (2) the fractures only affect the injection rate of CO 2 into the coal but not the final storage amount; (3) when gas is injected into coal the fractures will first expand and then close due to the changing effective stresses and the adsorption induced swelling of coal grains. This fully coupled dual-porosity model with a heterogeneous fracture distribution provides a way to predict the CO 2 injection into a coal seam.

Earthquake deformation field characteristics associated with the 2010 Yushu M_s7.1 earthquake

The spatial distribution and characterization of a heavily damaged area can be determined by studying surface ruptures of seismogenic faults.If the distribution of surface ruptures can be obtained shortly after they occur,then areas heavily damaged by an earthquake can be readily identified.The information can then be used as a guide for earthquake relief programs.In this paper,an intensity offset-tracking method applied to an ALOS PALSAR image is used to map the Yushu earthquake rupture and to identify the faults activated by the earthquake.Azimuthal displacement analysis indicates that the surface rupture is about 55 km long,running from the epicenter to the southeast,trending N310°W,with a relative displacement of～1 m characterized by sinistral slip.The result of range displacement observations indicates that the north wall of the fault is dominated by decreases(i.e.,uplift in line of sight observations) ,whereas in the south wall of the fault,the range displacement is dominated by increases(drops in line of sight observations) .Given the position from which the images were recorded,this means that the north wall moves westward,and the south wall move eastward,i.e.,left-lateral slip motion across the fault.Finally,an earthquake disaster assessment using computer-assisted image analysis software shows that buildings near the fault rupture have been destroyed most heavily;therefore,the shape of the heavily damage belt is controlled partially by the fault rupture's geometry and the damage degree relates to the magnitude of displacement field.

Contributions of non-tectonic micro-fractures to hydraulic fracturing—A numerical investigation based on FSD model

Shale gas has been discovered in the Upper Triassic Yanchang Formation, Ordos Basin, China. Due to the weak tectonic activities in which the shale plays, core observations indicate abundant random non-tectonic micro- fractures in the producing shales. The non-tectonic micro-fractures are different from tectonic fractures and are characterized by being irregular, curved, discontinuous, and randomly distributed. The role of micro-fractures in hydraulic fracturing for shale gas development is currently poorly understood yet potentially critical. Two-dimensional computational modeling studies have been used in an initial attempt toward understanding how naturally random fractured reservoirs respond during hydraulic fracturing. The aim of the paper is to investigate the effect of random non-tectonic fractures on hydraulic fracturing. The numerical models with random non-tectonic micro-fractures are built by extracting the fractures of rock blocks after repeated heating and cooling, using a digital image process. Simulations were conducted as a function of:(1) the in-situ stress ratio;(2) internal friction angle of random fractures;(3) cohesion of random fractures;(4) operational variables such as injection rate; and(5) variable injection rate technology. A sensitivity study reveals a number of interesting observations resulting from these parameters on the shear stimulation in a natural fracture system. Three types of fracturing networks were observed from the studied simulations, and the results also show that variable injection rate technology is most promising for producing complex fracturing networks. This work strongly links the production technology and geomechanical evaluation. It can aid in the understanding and optimization of hydraulic fracturing simulations in naturally random fractured reservoirs.