用于肠道检查的微小型蠕动机器人

基于蚯蚓运动原理研制了一种用于肠道检查的新型微小机器人，它采用步进电机作为驱动源，驱动力大，易于控制．介绍了该机器人的机体构造和运动原理，建立了力学模型并作了相应分析，详细阐述了系统的控制组成和软件设计，讨论了在不同材质、不同倾角管道内的驱动性能试验．结果表明：该微小型机器人运行可靠、平稳，有一定的爬坡能力．该研究为肠道检查机器人系统的实际应用奠定了基础．     

基于电磁驱动的蠕动型微机器人运动机理

根据仿生学原理开发了一种电磁驱动的蠕动型微机器人,利用计算机和机电控制系统对微机器人运动进 行控制．介绍了微机器人的结构,对其运动机理进行了分析和探讨,介绍了运动控制电路原理,并进行运动性能的 实验分析．实验表明,它能在直径小于10mm的管道内自行移动,携带内窥镜、CCD器件、照明系统,进行管内目视 检查作业．该研究成果对发展微机器人技术有积极的参考价值．     

四轮管道机器人的通过性能研究

针对市政管道的几何特点,以四轮管道机器人在弯道处的数学模型为基础,设计了四轮管道机器人.利用ADAMS软件对机器人进行了弯道通过性能分析,并绘制出了机器人运动的轨迹曲线.仿真分析结果表明,在满足数学模型的情况下,四轮管道机器人能顺利通过弯道,证明了设计的合理性.其中,过渡阶段轨迹曲线上的20mm微小跳动分析也为机器人的驱动控制研究提供了依据.     

基于电磁驱动的蠕动型微机器人运动机理

根据仿生学原理开发了一种电磁驱动的蠕动型微机器人,利用计算机和机电控制系统对微机器人运动进行控制.叙述了微机器人的结构,对其运动机理进行了分析和探讨,介绍了运动控制电路原理,并进行运动性能的实验分析.实验表明,它能在直径小于10 mm的管道内自行移动,携带内窥镜、CCD器件、照明系统进行管内目视检查作业.该研究成果对发展微机器人技术有积极的参考价值.     

基于电磁驱动的蠕动型微机器人的运动机理

根据仿真学原理开发了一种电磁驱动的蠕动型微机器人,利用计算机和机电控制系统对微机器人运动进行控制,叙述了微机器人的结构,对其运动机理进行了分析和探讨,介绍了运动控制电路,并进行运动性能的实验分析,实验表明,它能在直径小于１０ｍｍ的管道内自行移动,携带内窥镜、ＣＣＤ器件、照明系统进行管内目视检查作业,该研究成果对发展微机器人技术有积极的参考价值。     

微小管道机器人移动机械运动学与动力学特性

微小管道机器人能够帮助人们完成诸如小口径管道内检测等工作，其移动机构是机器人研究领域重要的研究内容之一，在分析研究行星齿轮驱动的微型机器人移动机构的运动学和动力学特性的基础上，详细讨论了移动机构的原理，功能及影响因素，研究表明，通过提高移动机构车轮的附着性和驱动力，减小寄生功率的影响，可较好地实现该微型机器人驱动。     

柔性蠕动式管道机器人弯道驱动能力研究

为了研究柔性蠕动式管道机器人处于弯管处的驱动能力,从受力分析、几何约束出发,针对机器人在弯管处的驱动能力与管道曲率及机器人跨距之间的关系进行了研究.分析了机器人在弯管处的受力特征及机器人软轴失稳状态对受力特征的影响,建立了机器人通过弯管时驱动能力与管道曲率及跨距关系模型,并对模型进行了仿真和实验研究.结果表明:仿真和实验结果与理论分析基本一致,证实了所建模型的正确性和有效性,为对柔性蠕动式管道机器人软轴跨度的选取以及机器人通过弯道时步距控制提供了方法和理论基础.     

基于快速转弯微小机器人系统的研究

介绍了一种基于尺蠖运动原理的能实现快速转弯的微小机器人系统,并对机器人进行了设计和制作,组装了实验用机器人样机,通过AT89C52单片机及其外围驱动控制电路对机器人行走和位置信号的产生进行控制,并通过二维PSD对微机器人的三维位置进行检测,取得了与理论一致的结果.实现了对该机器人的行走运动和位置检测控制的功能,为对该类机器人的进一步研究提供了一个新的思路.     

新型仿生介入机器人推进方式

生物管腔中运行的微型机器人驱动机理研究是当前机器人研究的一个热点．为研究适合于充满液体的生物管腔的微型管道介入机器人，基于精子的运动原理，提出一种机器人游动推进方案，建立了游动机器人动力学模型，对该推进方式进行了仿真分析计算．为证明该推进方案的可行性，制作了一个大尺度的机器人实验样机模型．实验表明：实验的结果符合理论的规律，从而证明理论的正确，该推进方式是可行的．     

气动爬缆机器人气压分析与试验

针对索径变化较大、表面情况恶劣的缆索，提出了一种采用铰链结构的气动蠕动式爬缆机男人结构模型，建立了该机器人气缸受力与高空气压损失等理论模型，并对样机研制实例进行了验算．研制了工程样机并在上海徐浦大桥上成功地进行了现场试验．仿真和试验表明，机器人气体压力损失与施工距离、高度、系统耗气量、气管倾斜度等成正比例非线性变化；机器人下降时速度较上升时均匀性好，能在斜拉桥缆索上安全、高效爬升．     

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.