话语标记研究综述

本文简要回顾了话语标记研究的起源,追溯了话语标记研究的发展历程,对各种不同的观点作了介绍与归纳.另外,本文还着重介绍了话语标记研究这一交叉领域的最近动向.     

Hamilton系统的动力学稳定性

主要介绍了Hamilton系统动力学所研究的问题,介绍了在Hamilton系统稳定性研究方向近年来的进展.例如:KAM理论、Mather理论、Arnold扩散等.     

相位式激光测距技术的研究

文章简述了相位激光测距技术的原理,就激光测距研究中关键技术研究状况做了详细阐述.介绍了相位式激光测距原理及关键技术发展,并就影响测量精度的因素做了简单介绍.     

壳聚糖絮凝剂在废水处理中的应用研究进展

简单介绍了壳聚糖絮凝剂,着重介绍了在给水及饮用水处理以及工业废水处理中壳聚糖及其衍生物絮凝剂的应用研究.以及国内外的最新研究进展;并对壳聚糖絮凝剂的其它相关研究进行了概述.     

电化学振荡研究概况

从实验和理论两个方面对电化学振荡的研究进展做了介绍.重点介绍了理论研究方面的情况,并提出了现阶段其理论研究中存在的不足以及今后的发展方向.     

中子诱发轻带电粒子出射核反应实验研究进展

本文介绍了中子诱发轻带电粒子出射核反应(n,lcp)研究的科学意义、研究方法和实验难点,对国际与国内的相关研究情况进行了比较全面的综述.对国际上基于n_TOF,LANSCE,ORELA和GELINA等中子源所进行的有关实验研究工作进行了系统的介绍,对国内的实验研究进行了全面介绍,对北京大学团队多年来基于4.5 MV静电加速器以及近年来基于北京HI-13串列加速器、中国散裂中子源反角白光中子源CSNS Back-n等中子源上所开展的实验研究工作进行了重点介绍.最后对国内今后在该研究方向的发展做了展望.     

新世纪内声空化声致发光的研究进展

介绍了21世纪创始6年来在声致发光方面理论研究和实验研究的国内外进展. 为了对比, 简要介绍了上世纪末的相应研究情况. 声致热核聚变、声(致)化学和声致发光共同以空化气泡内的高温、高压和高密度作为基础, 因此一并简单介绍了本世纪内对前两种声致效应的探讨.     

新世纪内声空化声致发光的研究进展——兼论声致热核聚变和声(致)化学

介绍了21世纪创始6年来在声致发光方面理论研究和实验研究的国内外进展.为了对比,简要介绍了上世纪末的相应研究情况.声致热核聚变、声(致)化学和声致发光共同以空化气泡内的高温、高压和高密度作为基础,因此一并简单介绍了本世纪内对前两种声致效应的探讨.     

理科实验考核方式的现状研究

介绍了理科实验考核的几种方式,简要分析了每一种考核方式的研究现状.书面考核方式主要阐述高考理科实验试题方面的研究.信息技术的整合考核方式主要介绍信息技术与实验操作本身及考核流程的整合方面的研究.     

一款航模的制作、操纵及在教学上的应用

中国自神舟飞船成功发射以来,在青少年中掀起一股航模热,而航空模型成为高校学生设计、研究的热门题材.对航模的制作研究势必对中国航空航天事业的发展起着很重要的作用.本文着重介绍了一款以KT板作为材料的航空模型,从设计、电子元件的选配、整机的制作做了介绍,以及研究了航模飞行原理和飞行控制,同时介绍航模在教学上的应用.     

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.