我国取得了信息存储密度比国外相关研究高一个数量级的重要成果

 在国家自然科学基金的连续资助下 ,中科院北京真空物理开放实验室、中科院化学所、北京大学电子学系、北京大学化学学院科研人员组成的联合科研小组 ,采用与国外不同的原理、设计和方法 ,设计、制备了一系列新型有机复合和有机分子信息存储薄膜 ,成功地实现了超高密度的信息存储 ,在有机超高密度信息存储材料领域取得了一系列突破性进展 ,在《应用物理快报》（Ａｐｐｌ．Ｐｈｙｓ．Ｌｅｔｔ．）、《物理评论快报》（Ｐｈｙｓ．Ｒｅｖ．Ｌｅｔｔ．）等国际上有重要影响的杂志上发表了多篇论文。     

我国取得了信息存储密度比国外相关研究高一个数量级的重要成果

在国家自然科学基金的连续资助下 ,中科院北京真空物理开放实验室、中科院化学所、北京大学电子学系、北京大学化学学院科研人员组成的联合科研小组 ,采用与国外不同的原理、设计和方法 ,设计、制备了一系列新型有机复合和有机分子信息存储薄膜 ,成功地实现了超高密度的信息存储 ,在有机超高密度信息存储材料领域取得了一系列突破性进展 ,在《应用物理快报》（Ａｐｐｌ．Ｐｈｙｓ．Ｌｅｔｔ．）、《物理评论快报》（Ｐｈｙｓ．Ｒｅｖ．Ｌｅｔｔ．）等国际上有重要影响的杂志上发表了多篇论文。１９９６年他们采用自行设计、合成和制备的全有…     

超高密度信息存储材料及技术研究进展

信息技术的飞速发展,要求不断开发出具有更高信息存储密度及更快响应速度的材料和器件,因而在纳米尺寸上实现信息存储功能的新型超高密度信息存储材料已成为当前信息领域一个发展速度快、学科交叉多、竞争十分激烈的研究热点.简要介绍了近年来该领域主要的研究方法,并着重对利用扫描隧道显微镜/原子力显微镜(STM/AFM)写入信息的存储材料的最新研究进展进行了综述.     

有机—无机纳米复合材料的研究进展

综述了有机－无机纳米复合材料的最新发展,包括该类材料的制备方法、性能研究和应用前景．三种主要的纳米复合技术为溶胶－凝胶法、嵌入法和纳米微粒填充法．纳米复合材料的光学和磁学等性能可用Ｍａｘｗｅｌ形态理论、层状结构理论和分形结构理论等来研究．这类材料已在力学、热学、电学、磁学、光学、宇航和生物仿生等领域表现出广泛的应用前景．     

信息存储材料:电子器件从"吉时代"到"太时代"跨越

随着信息技术的飞速发展,人类要处理的信息量与日俱增,要求不断开发具有更高信息存储密度及更快响应速度的材料和器件。如何提高读写速度、实现纳米尺度信息存储是目前迫切要解决的问题。超高密度信息存储是指信息存储密度大于1012比特／平方厘米（1太比特／平方厘米）,实现从电子器件从“吉时代”到“太时代”的跨越。与目前市售电子器件的存储密度相比,其信息存储能力堪称惊人。超高密度信息存储材料和器件作为纳米电子学的重要内容之一,将为未来信息技术的发展奠定理论和技术基础。     

快速超高密度外存储基础技术通过鉴定

快速超高密度外存储基础技术通过鉴定我校计算机外存储系统国家重点专业实验室研制的一种新技术能使目前磁盘存储器的信息容量扩大一个数量级，接收速率提高３倍．“快速、超高密度外存储基础技术”已于２月中旬通过了鉴定．专家鉴定认为，该课题研究水平达到了当前国际先...     

提高光盘信息存储的关键技术

本文从光盘的存储密度、数据传输率和超高密度存储三个方面讨论了提高光盘信息存储的关键技术。     

21世纪最有前途的材料Ⅱ——纳米材料的制备与应用

主要介绍了二维纳米薄膜、三维纳米晶体材料和纳米复合材料的制备方法。探讨了各种方法的特点与适用性,并展望了纳米材料在催化、光学、电学、磁学,传感器、陶瓷及生物医学等领域的应用前景。     

一维纳米结构材料的制备与组装

一维纳米结构材料在纳米电子学、纳米光电子学、超高密度存储和扫描探针显微镜诸多领域具有潜在的应用前景,已成为21世纪化学、物理学、材料学及生命科学等科技领域的研究热点。结合近期研究工作,主要介绍了一维纳米结构材料的制备方法和组装策略,并简要概述了一维纳米结构材料的应用前景及其国内外最新研究进展。     

尿素-NaBr低温熔盐体系中Er-Co合金的电沉积

稀土元素内层４ｆ电子的数目从０～１４逐个填充,造成它们之间在光学、磁学、电学性能上出现明显差异．衍生出种类繁多的高新材料［１］．稀土铁族金属合金具有优良的磁性、磁光性并可应用于磁性元件及磁光记录材料,目前多采用蒸镀和激光溅射法制备．但设备成本高、生...     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.