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1.
生物传感器     
本文综述了酶传感器,微生物传感器,组织传感器.细胞器传感器,免疫传感器,酶免疫传感器等的发展现状和发展趋势。  相似文献   

2.
黄成玉  张旭珍 《科技信息》2010,(34):I0098-I0098
本文分析了几种矿用传感器--粉尘传感器、CO传感器、甲烷传感器、温度传感器、湿度传感器的特性,指出稳定性,灵敏度,选择性以及抗腐蚀性是决定矿用传感器性能的四项指标,在此基础上论述了这些传感器的广泛应用。  相似文献   

3.
介绍了传感器管理对于传感器系统和融合过程的作用,提出了传感器管理的多层分类方法,探讨了传感器管理的控制和排序方面的问题,并通过实验演示了传感器管理系统控制电子优化传感器的移动方位和跟踪目标的排序过程。  相似文献   

4.
提出了一种监测灵芝生长环境的无线传感器网络(wireless sensor network)系统.传感器网络的节点由传感器部分、无线收发模块、单片机组成.节点传感器部分安装了温度传感器、湿度传感器、pH传感器、土壤水分传感器、光敏电阻传感器,并对相应的传感器工作原理进行了简单介绍.传感器网络的无线收发模块采用CC242...  相似文献   

5.
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。  相似文献   

6.
一维纳米材料具有优异的电子输运性质与光学性质,在场发射器件、场效应器件、传感器件、发光器件以及光伏器件中具有广阔的应用前景.本文介绍了纳米线在化学传感器和生物传感器,如H2传感器、O2传感器、CO传感器、NO2传感器、pH传感器、DNA传感器和病毒传感器等方面的应用现状及其研究进展.着重评论了各种纳米线传感器的灵敏度、响应时间和稳定性等特性,并对纳米线在其他传感器中的应用进行了展望.  相似文献   

7.
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。  相似文献   

8.
倾角传感器的智能化实现   总被引:1,自引:0,他引:1  
介绍了智能传感器的原理和基本功能、倾角传感器的用途以及所设计的液体摆电容式倾角传感器的原理,通过非线性校正、自校零与自校准和温度补偿等途径,倾角传感器实现了智能传感器的基本功能,更好地满足了设计的各项技术参数和其它要求,最后给出了倾角传感器实现智能化的流程图.随着科学技术的发展,智能传感器将会在越来越多的领域充当重要角色,是未来传感器技术发展的主要方向.  相似文献   

9.
传感器材料是传感器技术的基础,新材料的开发及应用促进了新型传感器的发展。文章扼要阐述了导电复合材料、纳米金属材料、碳纳米管材料等先进传感器材料在复合式柔性触觉传感器、电化学生物传感器、半导体气敏元件传感器中的应用。  相似文献   

10.
鞋垫式足底压力测量系统中压电式力传感器的设计   总被引:1,自引:0,他引:1  
介绍了鞋垫式足底压力分布测量系统中压电陶瓷力传感器的设计过程.根据系统的需要进行传感器的类型的选择与传感器在系统中的分布,并建立了传感器的力学模型来说明传感器的工作原理,对传感器的量程、线性特性、灵敏度等特性进行了详细的分析.通过实验验证了传感器的合理性及正确性.  相似文献   

11.
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.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
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.  相似文献   

13.
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.  相似文献   

14.
王慧 《科技信息》2008,(10):240-240
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.  相似文献   

15.
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.  相似文献   

16.
There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.  相似文献   

17.
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。  相似文献   

18.
In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.  相似文献   

19.
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.  相似文献   

20.
AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…  相似文献   

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