基于物联网的实验室环境监测系统设计

目的:设计基于物联网的实验室环境监测系统,解决传统的实验室环境监测系统存在的重复测量、实时监测效果差、数据交换不便等问题。方法:分析了实验室环境监测系统的设计意义和功能需求,基于物联网对实验室环境监测系统的硬件(包括基于CC2530芯片设计的协调器模块、终端采集节点模块,控制端的继电器模块)和软件(包括ZigBee协议栈以及各节点模块、上位机)进行了设计。结果与结论:系统利用无线射频网络ZigBee技术构建起树型网络,实现对实验室环境的覆盖,通过终端节点上的温湿度传感器、光敏传感器和烟雾传感器采集温湿度、光照强度和烟雾浓度等数据,然后将采集数据通过无线网络发送给上位机进行处理,实现了实验室环境监测和控制。     

基于ZigBee的无线温湿度采集系统设计

基于ZigBee技术设计了一套无线温湿度采集系统.将该系统部署到环境中,节点自发组网通信,终端采集节点可将环境的温湿度数据发送给协调器汇聚,再通过串口发送给上位机实时显示;协调器搭配联网模块可以连接云平台,客户端小程序订阅相关主题后也可以接收到协调器上报的数据,并查看到数据的变化趋势.该系统不仅能应用于家庭环境监测,还可以应用于工农业生产中.     

基于ZigBee的无线温湿度采集系统设计

基于ZigBee技术设计了一套无线温湿度采集系统.将该系统部署到环境中，节点自发组网通信，终端采集节点可将环境的温湿度数据发送给协调器汇聚，再通过串口发送给上位机实时显示；协调器搭配联网模块可以连接云平台，客户端小程序订阅相关主题后也可以接收到协调器上报的数据，并查看到数据的变化趋势.该系统不仅能应用于家庭环境监测，还可以应用于工农业生产中.     

无线温湿度监测网络节点设计

给出一种基于NRF9E5、AM2301的无线温湿度监测网络节点设计。采用AM2301温湿度传感器检测环境的温湿度。以NRF9E5读取当前环境的温湿度数据并进行无线数据传送。详细介绍了节点结构、硬件电路设计并对节点进行软件测试。经实验实现了点到点无线数据通讯,系统运行稳定。     

基于ZigBee的无线温湿度监控系统设计

本设计利用ZigBee协议构建一个无线传感器网络系统。传感器节点采集各位置的温湿度数值,通过ZigBee协议经无线网络传输到上位机,上位机可以实时显示各传感器节点的温湿度值,并根据各监控点不同的温湿度要求设置不同的温湿度报警值。     

基于无线传感器网络的温湿度监控系统

本文设计并实现了由一些相互独立可移动传感器节点、基站构成的无线温湿度监控系统。每个可移动传感器节点以STC12LE5A32S2微处理器为核心,附加温湿度传感器、射频收发模块nRF905及其他外围设备,实现了数据的采集,处理和收发等功能;基站主要由基站节点及上位机组成,是数据的总监测中心,实现温湿度数据的实时显示、绘图、报警、存储等功能。     

基于无线传感器网络和GPRS的温湿度远程监测系统

本文针对现有温湿度监测系统的缺陷和不足,采用基于ZigBee的无线传感器网络和GPRS技术,设计实现了一种真正能进行远程环境温湿度监测的系统。本方案充分利用现有的ZigBee和GPRS模块化设备进行组网,编写了ZigBee协调器与GPRS模块的接口程序,并实现了上位机监测软件。结果表明,系统运行稳定、采集温湿度数据准确、部署方便灵活。     

基于无线传输的输电线路调试测量系统设计与实现

设计并实现了一套基于无线传输的输电线路调试测量系统.该系统由无线中心主站、无线电流采集传输节点、无线电压采集传输节点组成,采用2.4GHz频段高速无线网桥进行数据通信,以避免变电站常规干扰源的频段,且具有传输距离远、传输稳定的特点.利用互感器套管和电容器组成无线电压采集传输节点,基于霍尔电流传感器和电流互感器组成无线电流采集传输节点.无线电流采集传输节点、无线电压采集传输节点间采用基于IEEE1588协议的时钟同步模块进行时间同步.测量系统实现了数据存储、波形显示、数据分析和报表自动生成等功能.在江苏电网某500kV变电站进行了现场试验,验证了该测量系统的有效性与可靠性.本测量系统可避免复杂的布线工作,减少变电站传导干扰影响,显著提高试验效率.     

基于ZigBee无线传感器网络的温室监测系统设计

为了解决温室环境监测系统中遇到拓扑结构固定、节点延展性差等问题,提出了基于ZigBee无线传感器网络的温室监测系统设计与实现方法,构建了基于ZigBee协议的无线监测网络,给出了网络中节点硬件和软件的设计方案,详细论述了ZigBee协调器的组网过程。该系统利用PIC18F4620单片机控制CC2420无线收发器模块收发数据、驱动温湿度传感器（SHT11）,通过I²C总线方式进行数据采集,将采集的温湿度经ZigBee网络传输到监测平台。测试结果表明,该系统具有结构简单、节点灵活、功耗低等优点,实现了在无线环境下对温室中温湿度的有效监测。     

多点无线温湿度实时监控系统的设计与实现

多点无线温湿度实时监控系统分为上位机和下位机两部分。下位机主要负责各监测点的温湿度数据的采集和处理以及本地显示．同时接收上位机的控制指令并根据指令的要求通过无线与上位机进行远程温湿度数据的交互。上位机实现数据的显示和管理。     

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.