聚合物/表面活性剂二元复合驱研究进展

从聚合物/表面活性剂二元体系的特点出发，综述了聚/表聚/表二元复合体系的实验室研究现状以及在胜利油田孤东七区54-61进行的矿场试验情况。聚/表二元复合驱是在聚/表/碱三元复合驱的基础上去掉碱所形成的低浓度的驱油体系，可以最大限度地发挥聚合物的粘度和弹性，减少乳化液处理带来的负面影响，减弱由于碱的存在引起的地层以及井筒结垢的现象。通过国内外研究结果分析表明，聚/表二元复合体系提高原油采收率幅度在20%左右；矿场试验取得了较好的效果。聚/表二元复合体系可以克服三元体系的缺点，作为一项新的驱油方法具有宽阔的发展空间。     

Two-dimensional generalisations of dynamic programming for image analysis

Dynamic programming (DP) is a fast, elegant method for solving many one-dimensional optimisation problems but, unfortunately, most problems in image analysis, such as restoration and warping, are two-dimensional. We consider three generalisations of DP. The first is iterated dynamic programming (IDP), where DP is used to recursively solve each of a sequence of one-dimensional problems in turn, to find a local optimum. A second algorithm is an empirical, stochastic optimiser, which is implemented by adding progressively less noise to IDP. The final approach replaces DP by a more computationally intensive Forward-Backward Gibbs Sampler, and uses a simulated annealing cooling schedule. Results are compared with existing pixel-by-pixel methods of iterated conditional modes (ICM) and simulated annealing in two applications: to restore a synthetic aperture radar (SAR) image, and to warp a pulsed-field electrophoresis gel into alignment with a reference image. We find that IDP and its stochastic variant outperform the remaining algorithms.     

浅论位移电流

位移电流是普通物理中一个较重要的概念,也是教学中的一个难点.本文从位移电流概念的提出及实验验证,位移电流的物理意义及其与传导电流异同等几方面对其加以阐述,以求对位移电流的教学有所帮助.     

论德育场与德育新思维观

“德育场”作为自然场的派生物 ,其本质特征是重视德育系统与过程中各要素的能量、信息辐射、吸引力以及相互作用 ,与传统德目主义、整体主义德育模式的“控制”、“强化”教育相比 ,场思维的德育模式更重视对德育对象的民主诱导和德育过程的双向互动。德育场的核心要素是吸引子 ,吸引子按其价值取向可分为主导吸引子、辅助吸引子、异构吸引子 ,它们彼此按照耦合原理、役使原理、涨落原理与自发对称破缺原理进行运作。     

Old Structures,New Relations: How Community Development Credit Unions Define Organizational Boundaries

Studies of organizational dynamics examine the manner in which an organization's immediate environment defines the rules and requirements to which individual organizations must conform in order to receive legitimacy and support (Scott, 1992:132). In this paper we consider the question of how an organization can achieve legitimacy and support without necessarily compromising its organizational forms or practices to isomorphic pressures. We frame the question in terms of the boundaries between organizations and their environments. Where the population ecology studies show the survival value of adopting known organizational forms and practices, and neoinstitutionalism addresses the need to display compliance with accepted forms, our case study demonstrates the possibility of removing an organization or set of organizations from the familiar interaction by naming it as a subfield of the organizational field, sharing the environment, but out of the way of predefined norms and practices.     

从革命话语到建设话语的转变--中国政治话语的语义分析

建国50年来,中国政治话语体系经历了从革命话语体系向建设话语体系的转变.本文分析了这两套政治话语体系的建构过程,并对其特征进行了探讨.本文认为,革命话语是毛泽东时代的政治交流方式,这套话语体系最显著的特征就是保证社会、个人与国家权力话语的高度一致,以适应国家在经济上的高度集权管理和在思想文化上的严格控制.改革开放后中国的政治话语是围绕"建设"或"现代化"而建构起来的,它包括"国家建设"、"经济建设"、"制度建设"和"文化建设"的四个语义场.     

铁环型周期磁场摇摆器的实验研究

设计了一种铁环型周期磁场摇摆器。对此摇摆器的磁场做了细致测试。结果表明,实验与理论设计很好相符。当螺旋线管电流为133A 时,摇摆器可产生0.055T 的远轴径向磁场强度。该磁场强度能满足低能束自由电子激光的要求。本实验可作为其它摇摆器设计时的参考。     

宋代文论视野中的"趣"

"趣",作为我国古代文论的重要审美范畴,在宋代文学批评与理论视野中,首次得到大量运用与集中阐说,表现为在诗评中开始广泛出现;在诗论中得到阐说和提升;在词评中也得以引入.这标示出了"趣"作为古代文论审美范畴的成型.     

试论对宗教信仰的社会观照与人生观照

从社会批判的角度看,宗教的确是"人民的鸦片";但是如对宗教进行人生观照,又不难发现其在终极价值关怀上的某些特殊意义.我们不仅要从社会批判的角度宏观分析宗教信仰的存在,而且也要从人生的角度,内在地观照、肯定宗教对于人生的积极意义方面,并以此为契机在教育及宗教两个系统内实现对宗教教育与文化资源的深度开掘与利用.     

论“左岸派”对“艺术电影”的贡献

"左岸派"电影在世界观、作者电影的纯粹性、心理领域和新型的观众理论等方面都有独特的探索,为艺术电影奠定了坚实的基础。