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．     

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。     

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.     

一种空间正交四边形滚动机器人

为使机器人仅利用较少的自由度就可实现移动及转向,提出了一种具有空间正交四边形几何形态的新型滚动机器人.该机器人本体是一个14杆16副的空间连杆机构,由2个平台和4条支链构成,外观形态为一对空间正交的四边形.并基于其自由度与运动原理,分析了该机器人的稳定性和滚动方向,进行了运动仿真.制作了一台原理样机进行实验以验证概念的可行性.实验结果表明,该机器人能够在2个驱动器控制下以翻滚步态实现全方位移动.     

基于有限状态机理论的多节机器人运动步态分析

基于蚯蚓生物体运动原理研制了一种新型多节蠕动微小型机器人．机器人由5节铰链式结构组成，其外形直径约6．8mm，长度约110mm．介绍了该类机器人的机体构造和运动原理．在详细阐述有限状态机理论方法的基础上．建立了机器人的运动步态分析数学模型．并进行了单个行进波模式和任意行进波模式下改变机器人运动方向的机器人运动步态仿真分析．结果表明，该方法可用于分析该类机器人运动步态的可行性和所建立模型的正确性．从而为研究该类多节机器人系统的运动步态问题提供了理论依据．     

一种基因芯片检测仪样机的研制及可靠性分析

根据核酸扩增基因芯片杂交检测的原理设计了一个能够集扩增、杂交、检测于一体的新型检测仪的主体结构.利用大型仿真软件ADAMS对检测仪的主体机器人虚拟样机进行了运动学仿真,得到基因芯片的位移-时间和速度-时间曲线.应用机构运动可靠性原理对主体机器人的运动可靠性进行了分析,计算了主体机器人的运动精度.结果表明,无论考虑横向误差还是纵向误差,检测仪都具有良好的运动精度,从而证明了样机的可行性.     

面向核聚变舱探测的遥操纵蛇形机器人系统

为了监测核聚变试验装置的日常运转状况,代替人类进入舱内完成探测作业任务,设计一种具有蛇形多关节结构的遥操纵机器人系统.该系统由前端的双重观测机构、中部的多个悬空机械臂和后端的直线轨道推进装置组成.通过对系统各部分的结构设计及功能分析,确立了组合式悬空机械臂各关节的主要参数指标.对机器人系统的探测工作空间以及机械臂的运动和力学特性进行了仿真分析,实际构建了机器人原理样机以及核聚变舱的模拟几何环境.对原理样机的基本运动及观测性能进行了实验测试,测试结果验证了所设计的机器人系统的可用性和有效性.     

微装配机器人无标定视觉伺服

为获得高效的微装配机器人系统性能,避免复杂的摄像机标定,提出了一种基于图像雅可比模型辨识的微装配机器人无标定视觉伺服结构和控制算法;设计了视觉伺服控制律;成功进行了微操作手二维平面定点、直线轨迹跟踪、圆周轨迹跟踪和三维涂胶运动实验,实验结果表明:提出的系统结构和控制算法具有良好的实际效果.     

一种仿尺蠖式输电线路巡检机器人越障运动分析

针对目前输电线路巡检机器人作业空间小、越障能力差的问题,通过观察与分析尺蠖运动特点,结合仿生学原理,提出了一种仿尺蠖运动的输电线路巡检机器人。运用运动学方法及虚拟样机技术对机器人蠕动式越障运动过程进行仿真与分析,仿真结果表明,机器人结构设计合理,具有较大作业空间,能以蠕动式运动方式跨越线路上引流线等复杂障碍。研制机器人样机并置于模拟线路环境进行实验,实验结果表明,机器人越障过程中重心波动平稳,越障性能稳定可靠。     

电磁驱动球形机器人转弯特性分析

本文提出一种电磁驱动全方位运动球形机器人驱动原理.采用几何分析的方法,推导出球形机器人低速运动时,转弯半径的表达式;利用分析力学的力平衡、力矩平衡方法,考虑到离心力、陀螺效应等因素的影响,对球形机器人的转弯特性进行了深入的分析,分别建立了球形机器人中速、高速运动时的转弯半径计算方程;通过对比分析,验证了所建立的转弯半径计算公式的正确性.     

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.     

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.     

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.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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.