Domain-wall energy in sintered Nd15Fe77B8 permanent magnet

From measurements of the magnetic domain widthsD versus grain thicknessL, we have determined the domain wall energy in the demagnetized state for a sintered Nd₁₅Fe₇₇B₈ magnet: = 56 erg/cm². Using this wall energy and the published magnetocry-stalline constantK ₁=4.9×10⁷ erg/cm³, we have calculated the exchange constantA=4.0×10^–6 erg/cm, domain wall thickness _B=89 Å, and the critical diameter for single domain particlesD _c=0.67 m.     

Design considerations and computer modeling related to the development of molecular scaffolds and peptide mimetics for combinatorial chemistry

Summary A critical issue in drug discovery utilizing combinatorial chemistry as part of the discovery process is the choice of scaffolds to be used for a proper presentation, in a three-dimensional space, of the critical elements of structure necessary for molecular recognition (binding) and information transfer (agonist/ antagonist). In the case of polypeptide ligands, considerations related to the properties of various backbone structures (-helix, -sheets, etc.; , space) and those related to three-dimensional presentation of side-chain moieties (topography; (chi) space) must be addressed, although they often present quite different elements in the molecular recognition puzzle. We have addressed aspects of this problem by examining the three-dimensional structures of chemically different scaffolds at various distances from the scaffold to evaluate their putative diversity. We find that chemically diverse scaffolds can readily become topographically similar. We suggest a topographical approach involving design in chi space to deal with these problems.     

从乡村到城市--迟子建小说《踏着月光的行板》浅析

迟子建的近作<踏着月光的行板>延续了作者对小人物命运的关照和对精神关怀的追求,但由于城市背景的置入,在对欲望的不彻底规避下又缺乏对欲望的直面表达,从而给人一种不真实感,削弱了小说思想的表现力.从乡村到城市,迟子建还有一段路要走.     

Orthogonal Wavelets Analysis of Electroanalytical Signals

ABSTRACT

A signal processing technique based on orthogonal wavelet analysis is applied to process various simulated electroanalytical signals. The results indicate that if the scale parameters are selected, the orthogonal wavelet processing method (OWPM) can remove high-frequency noise. Experimental signal was recorded by computer and used to test the OWPM procedure. After processing with OWPM, the processed data was used to analyze the mechanism of the electrode reactions. Processed results of the experimental data are also satisfactory.     

陈炽的经济思想

近代经济思想家陈炽在商务、机器养民、货币等方面均形成了自己独到的见解和主张。在《续富国策》等中,企图利用"天心""天道"等理由说服封建统治者变革,提出设立上下议院等变革主张,以"公利""私利"的区别鼓吹发展商品经济。他的有关商务理论、"养民"思想及货币理论在当时发挥了重要的启蒙作用。     

论后仇池国与刘宋、北魏的三角关系

魏晋南北朝时，氐族杨定建立的后仇池国位于今甘肃省东南部，处于北魏和刘宋两大势力的夹缝中。为了生存发展，后仇池国分别对这两大势力奉表称臣，过着朝秦暮楚的生活，其目的就是想东食西宿、左右逢源，趁机壮大自己的势力。北魏和刘宋为了相互钳制对方，也尽力拉拢后仇池国，对其实行羁縻政策，双方甚至为争夺仇池而大动干戈，进行了你死我活的斗争。为灾荒所逼，后仇池国两次对刘宋发动战争，结果招来灭顶之灾。     

明丽的忧伤──浅论萧红、迟子建小说的美学风格

作为时隔50多年相继从北大荒进入都市的年轻知识女性,萧红和迟子建对其曾置身其中的地域文化作出了理性的观照和思考.在创作取材上,倾向于描写北国乡民沉重但并不绝望的生存状态,呈现出浓郁的悲剧色彩.并且由于作家本体气质的接近,在文体上共同表现出清顺明朗的美学风格,且与小说内容的沉郁悲壮达到了和谐统一.     

静养善端与道翱翔--陈白沙心学方法论基本框架探奥

主静说和通变说是陈白沙心学方法论中的两条经纬线。前者是指通过澄心、静思而达到自得，此谓悟道。后者系指以静驭动，知几而作，随时以变，是为用道。由此向人们展示了一条以静虚为本、将知情意融为一体、在精神上和践履上都臻于真善美统一的人生理想境界的修养路径。表面看来，这种方法论颇似禅学，实际上其思想体系则与释道迥异。     

国外研究中国革命史的历史考察:加拿大部分

加拿大的中国革命史研究起于２０世纪６０年代。各大学和研究机构非常注意对相关资料的搜集和整理，以及对国外优秀人才的引进。因此，加拿大的中国革命史研究状况与其他国家相比，虽在研究的广度和研究体系的完整性方面尚有不足，却有急起直追之势，目前的研究主要涉及中国近代思想史、华人移民史、加拿大在华传教士研究、中华民国史、新民主主义革命史和人物研究。     

生活和生命——生存的张力结构——池莉小说解读

女作家池莉以其睿智、聪颖、深邃的目光,解读了生活、生命的奥秘.在个体生存的张力结构中,品评、窥视并营构了人类鲜活、强劲、厚重的精神家园,从中达到对生存意识的深层观照与张扬.