疏松砂岩油藏大孔道定性识别新方法研究

疏松砂岩油藏在长期注水开发过程中,往往伴随着大孔道的出现,这严重影响了油藏水驱开发效果,制约了采出程度的进一步提高,因此,大孔道识别及有效封堵成为该类油藏急需解决的关键问题.通过研究分析,确定了影响大孔道从形成到发展的7种主要静态因素,以及标志大孔道形成的6种主要动态因素.将层次分析法及灰色关联法相结合,分别计算静态及动态因素的权重,建立了全新的大孔道定性识别模型.示踪剂监测结果验证了该方法的实用性和有效性.     

从作者性别批评视角看简·爱和吕蓓卡的人物形象差异

简·爱与《名利场》中的女主角吕蓓卡是英国维多利亚时期文学中两个具有同样独立反叛意识但被作者赋予不同命运结局的女人。从作者的性别视角去解读这两个传统女性形象的本质差异,能看出男女作者对女性反抗压迫行为的不同理解和价值判断,并能更好地发掘出被别的批评视角忽略或误读的文本内涵。     

具有sn-网的空间

证明了具有σ—点有限sn—网及σ—局部可数sn—网的空间可刻划为度量空间在某些确定映射下的象.     

Decoration of disclinations by solidification-induced band texture and focal-conic texture for a low-molar-mass liquid crystal

Two decoration techniques, solidification-induced band texture decora tion and focal-conictexture decoration, have been established to exhibit the director field of disclinations in a low-molar-mass methacrylate liquid crystal. The disclinations with strength s = 1/2 and s = ±1 are observed by the two decor ation methods. For the solidification-induced band texture decoration, the molecular orientation is perpendicular to the direction of the band. While for focal- conictexture decoration, it has been proved by the results of IR dichroism that the direction of the director is parallel to the direction of the focal-conic. Therefore, the sketch map of the molecular director filed can be mapped according to the morphological pattern of the solidification-induced band textureor focal-conic texture.     

钛酸铋的热力学理论

利用点群４／ｍｍｍ的对称性给出了应力作用下的钛酸铋的弹性吉布斯自由能的表达式，并导出了自发应变，介电性质和压电性质。     

浅析基于电子商务网络安全PKI技术的角色访问控制模型

文本提出了一种区别于传统自主访问控制策略和强制访问控制策略的RBAC网络安全策略,并提出了RBAC的面向对象模型,实现用户身份认证与访问权限的逻辑分离,且易于控制,既能有效的改进系统安全性能,又极大地减少了权限管理的负担。     

Finding finer functions for partially characterized proteins by protein-protein interaction networks

Based on high-throughput data, numerous algorithms have been designed to find functions of novel proteins. However, the effectiveness of such algorithms is currently limited by some fundamental factors, including (1) the low a-priori probability of novel proteins participating in a detailed function; (2) the huge false data present in high-throughput datasets; (3) the incomplete data coverage of functional classes; (4) the abundant but heterogeneous negative samples for training the algorithms; and (5) the lack of detailed functional knowledge for training algorithms. Here, for partially characterized proteins, we suggest an approach to finding their finer functions based on protein interaction sub-networks or gene expression patterns, defined in function-specific subspaces. The proposed approach can lessen the above-mentioned problems by properly defining the prediction range and functionally filtering the noisy data, and thus can efficiently find proteins’ novel functions. For thousands of yeast and human proteins partially characterized, it is able to reliably find their finer functions (e.g., the translational functions) with more than 90% precision. The predicted finer functions are highly valuable both for guiding the follow-up wet-lab validation and for providing the necessary data for training algorithms to learn other proteins.     

"藏汇于国"到"藏汇于民"的外汇投资渠道探讨

为了更好地落实藏汇于民,必须拓展外汇投资渠道,使藏汇于民成为可能。文章主要探讨当前可能的主要外汇投资渠道,并就在外汇投资活动中需要注意的事项给予说明。     

翅茎香青精油的化学成分

从江西省武功山采集的翅茎香青「Ａｎａｐｈａｌｉｓ ｐｔｅｒｏｃａｕｌａ（Ｆｒａｎｃｄ。ｅｔ Ｓａｖａｔ。）Ｍａｘｉｍ」其精油通过ＧＣ及ＧＣ／ＭＳ分析，共鉴定了３１个化合物，占总量的９０．９１％。其中主要成分为β－丁香烯，含量达４０％以上，为翅茎香青精油的主体成分。油样经轻工业部上海香料研究所评定，认定它与山Ｑｉｕ油的主体成分。油样经轻工业部上海香料研究所评定，认为它与山Ｑｉｕ油的香气相似，可用于调     

中药材中孳生粉螨的初步调查

本文采用清水漂浮法和塔氏电热集螨器分离法,共分离中药材样本124种,1240份,从中分离出粉螨45种,隶属7科23属.得出结论:中药材粉螨的污染严重,应加强对中药螨类的防治,以保护中药材及预防人体螨病.