光纤悬壁梁式振动传感器的研究

研究了一种新型结构的光纤悬臂梁式振动传感器,该传感器的光纤悬壁梁带有光纤微准直透镜,提高了光路的光耦合效率,接收探头采用双光路差分结构,大大提高了传感器灵敏度,同时也增强了抗干扰能力,通过实验测试研究了该传感器对压电陶瓷激振的响应特性,证实了该传感器对振动测试的能力。     

刚柔混合三腿六维力传感器测力性能分析

研究了一种新型的三腿六维力传感器的测力性能,基于3-RPS(转动副-移动副-球副)并联机构研制传感器样机,建立了该样机的静力模型,得到了施加在传感器上的外力与传感器本身6个单维力传感器的映射关系;对新型传感器进行了静态标定实验,根据实验结果分析传感器的测力性能,得到三腿六维力传感器的测力性能评价指标,为该传感器的优化及应用提供了参考依据和基础。     

基于ZigBee的传感器实验平台改造及应用

针对传感器实验设备功能单一、移动性差等问题,分析江汉大学传感器与检测技术实验平台的结构特点,设计了一种基于ZigBee技术的传感器实验平台。该实验平台是在现有传感器实验平台上进行改进,通过增加ZigBee无线通信功能,使其同时满足传感器技术和无线传感器网络两门课程实验教学的需求。该系统由传感器实验模板、ZigBee终端节点、ZigBee汇聚节点和PC机组成,各终端节点连接不同的传感器模板,将采集的数据通过ZigBee无线网络传送给汇聚节点,并最终传送给PC机观测。在介绍该实验平台的软硬件设计之后,以基于ZigBee的无线应变传感器实验为例,详细介绍了如何利用该平台开展实验项目。结果证明,该实验平台数据传输可靠,满足实验教学需求。     

一种模糊传感器数据融合的方法

基于模糊传感器数据相关的特性，给出了一种模糊传感器数据融合的方法．该方法从传感器的重要度，各个传感器对模糊命题支持度的一致度，以及传感器重要度对数据融合结果的复合作用3个方面分析了它们对模糊传感器数据集成的影响．定义了一个一致性系数综合反映了这3个因素．基于该一致性系数实现了模糊传感器的数据融合，并将该方法用于工件识别中．     

基于神经网络的传感器故障监测与诊断方法研究

提出了一种基于神经网络的传感器故障监测与诊断的新方法。该方法先用BP网络的预测输出和传感器实际输出之差来判断传感器是否发生了故障，然后用函数型连接神经网络模拟传感器的输出特性函数，通过计算神经元连接权值的变化，确定传感器哪个输出特性参数发生了变化，最终推断传感器发生了哪一类故障。该方法的特点是只需要知道一个传感器的信息。电阻应变式力传感器故障诊断实验结果证明了该方法的实用性，为传感器故障监测与诊断提供了一条新途径。     

基于损耗模态共振原理的生物传感器

为解决传统蛋白质检测传感器的复杂性问题,提出基于损耗模态共振原理的生物传感器设计方案.该传感器制作在机械强度较佳的玻璃基板上,通过表面溅镀金属氧化物薄膜,使感测区能抓取牛乳中的蛋白分子,经表面改质后有效提高了传感器感测灵敏度.通过对金属氧化物薄膜厚度的仿真优化,该传感器灵敏度最高可达7200 nm/RIU.与同类型其他结构的传感器相比,该传感器灵敏度较高,且加工容易,成本更低,有利于传感器的量产及应用.     

多惯性传感器的数据采集及其质量筛选研究

MEMS惯性传感器在商业上得到广泛应用,但由于MEMS工艺、检测电路等条件的限制,在精度和可靠性方面存在劣势,有些传感器误差较大或完全损坏。为此,设计了基于STM32的多惯性传感器数据采集系统,通过实验采集了大量的传感器数据,在惯性传感器的误差分析的基础上,提出了MEMS惯性传感器快速筛选方法,基于该方法对采购的批量MEMS惯性传感器进行了筛选,剔除了不可靠的传感器。结果表明,该系统稳定可靠、数据采集真实准确,快速筛选方法对MEMS惯性传感器的筛选十分有效,可用于工程实践中。     

一种新型深海压力传感器的设计与系统仿真研究

随着对深海探测的不断深入,对压力传感器的测量性能提出了更高要求。为了实现在一定的大压力下对微小水压变化的精确测量,文章设计了一种活塞式深海压力测量传感器,该传感器不仅可以主动调节传感器的内外压力差,采用压力累加的方法获得大水深的压力值,还有效地提升了对微小水压变化的识别度。采用AMESim软件对整个传感器系统建立了仿真模型,分析了该活塞式压力传感器在深海中对不同动作模式的响应情况。结果表明,在6 000 m水深的情况下,出现10m水深波动时,该传感器的测量误差约为1.284mm。     

各向异性磁阻传感器在车辆探测中的应用

研制了一种基于各向异性磁阻(AMR)传感器的车辆探测器.该车辆探测器由三维AMR传感器及相应的信号处理电路组成.当车辆驶过探测器上方时,车辆的存在将会引起周围磁场的变化,三维AMR传感器输出将发生相应的变化,根据AMR传感器的输出可判断周围空间内车辆的存在与否.对该探测器的特性进行了实验研究.实验结果表明:当车辆分别沿南北向、东西向通过AMR传感器上方时,传感器输出变化规律不同;该探测器可实现车辆探测.     

双弯曲梁多轴腕力传感器设计

针对智能机械手的使用性能要求,设计了一种新型双弯曲梁多轴腕力传感器.该新型结构传感器有利于加工和安装,避免了因加工、时效等引起的变形、误差、不对称性等对传感器性能带来的影响,改善了传感器的工作性能,建立了该传感器力学模型,并从不同方向进行了受力分析.在确定传感器变形梁应变片的粘贴位置、组桥设计分析的基础上,开展了传感器单梁和整体加载试验,并进行理论计算和有限元分析.研究了不同加载试验下引起相对误差的原因,提出了传感器标定的解决办法.     

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.     

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.     

The Analects and the Moment in Peking——The influence of a Confucian education system on the personality formation,the way of thinking and the fate of the main characters

0.Preface China has long been boasting of its colorful and immense culture which comprises of Taoism,Confucianism and Buddhism.The interwoven influence among the religions on Chinese way of thinking,on the nation＇s behavior in their social life throughout the long history is beyond list.