浅谈集抄技术在供电企业的应用

本文着重阐述集中抄表技术的发展、集中抄表系统的模式和特点、运用集中抄表系统的效益，说明集抄技术在供电企业的应用。     

低压集抄系统的现状与管理分析

低压电力用户集抄系统是近年来我国发展十分迅速的智能化电能表抄表、采集系统。该系统通过对低压电力客户集中自动抄表,实现远程自动抄表功能。本文归纳了低压用户集中抄表系统的基本结构。简要分析由专线、无线电、电力线载波等信道构成的集中抄表系统的发展过程和特点。根据目前使用情况,提出低压电力集中抄表系统推广应用中有待解决的系统规划设计、传输规约和配电网络资源管理等问题。     

GPRS技术在农村配电网抄表领域的研究与应用

阐述了远程集中抄表系统的整体设计框架及电力监控中心的组成结构,提出了基于GPRS通信技术的远程集中电力抄表系统。该系统方案在电力抄表领域兵有较大的推广价值。     

基于新技术的集中抄表系统的设计

介绍了低压电力用户集中抄表系统的发展和系统组成,对其各个部分的原理做了详细的介绍,介绍了系统的工作流程,包括数据采集器、数据集中器和计算机数据处理中心。然后介绍了各个部分的技术解决方案,并对集中抄表系统关键技术的发展趋势和新技术在集中抄表系统中的应用做了详细的论述。本文对低压电力用户集中抄表系统的开发和设计具有很高的参考和实用价值。     

远程集中抄表技术在矿区改造中的应用

该文介绍了三种远程集中抄表技术，并通过调研和对比，确定了符合矿区居民电表的电力载波集抄技术，并在大河东小区进行了试点实施。具体实施过程分为四个环节：电表远程秘钥下载及安装、用户档案建立、用户信息导入、通讯通道设置，实现了远程集中抄表、远程控制、数据回抄等功能，达到了预期效果，但在数据处理等方面，还需要进一步加强和完善。     

光电直读式远传燃气表及集中抄表系统

0概述随着国内燃气行业信息化、智能化的推行,燃气收费体制面临着一次重要改革,且计量表具数量剧增,抄表工作量增大,尽快采用新的抄表技术来提高抄表工作效率和服务水平,已经成为业内的共识。自上世纪九十年代末开始,绝大多数燃气公司为能不增加抄表人员数量、提高抄表工作效率,不同程度地对远传燃气表和集中抄表系统进行了积极尝试,所采用的系统绝大多数为有源脉冲式集中抄表系     

基于GSM短消息的集中抄表系统的设计与实现

介绍了利用GSM调制解调器(西门子TC35和中兴GM18)实现的基于GSM短消息的集中抄表系统的设计思路与实现方法。给出了一种新的集中抄表系统体系结构,并详细讨论了GSM调制解调器的接口电路和通信软件模块设计。     

集中抄表系统现状及一种智能中继的设计

本文简单分析了当前国内集中抄表系统应用的现状并介绍了一种智能中继器的设计方案,以及其在集中抄表系统中的工作模式和构成。     

低压集中抄表系统设计分析

本文根据珠海城区低压用户情况初步调研分析的基础上,结合近期广东电网低压用户集中抄表系统的建设应用情况,简要叙述了珠海供电局低压集中抄表系统技术产生的背景,介绍了低压集中抄表系统设计的现状、必要性、目标、需求、系统总体结构、通讯网络要求的结构和特点等。     

智能电表及远程集中抄表的现状和发展趋势

本文介绍了目前国内外常见的应用于集中抄表的电表的结构和工组原理以及国内近几年流行的几种关于集中抄表的方案,比较了各自的优缺点。     

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.