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1.
配网管理系统是一个涉及供电企业运行管理、设备管理、用户服务等各个方面的计算机网络系统。本设计以配电自动化实时环境、地理信息系统、综合性数据库系统等为基础,组成多个相对独立的应用功能子系统,包括配网自动化(DA)、自动作图(AM)和设备管理(FM)、配电工作管理(DWM)、故障投诉管理(TCM)、需求侧管理(DSM)、配网分析系统(DAS)等。以实现配电网的管理自动化,优化配网运行、提高供电可靠性、为用户提供优质服务。  相似文献   

2.
海洋底栖动物浮游幼体附着和变态的研究   总被引:3,自引:0,他引:3  
海洋底栖动物浮游幼体附着和变态的研究具重要的理论和应用价值.我校海洋系在国内较早开展该领域的研究,近10年来,取得了系列研究成果,促进了我国在海洋底栖动物幼体附着和变态研究领域的发展.所研究的海洋底栖动物有翡翠贻贝(Vegna viridis)、僧帽牡蛎(Saccostrea cucullata)、盘鲍(Haliotis discus discus)、杂色鲍(Haliotis diversicolor)、华贵栉孔扇贝(Chlamys nobilis)、台湾东风螺(Babylonia formosae)、方斑东风螺(B.areolata)、冠瘤海鞘(Styela canopus)和白脊藤壶(Balanus albicostatas).研究内容包括幼体附着和变态过程中的幼体行为学和形态学观察、幼体附着和变态的影响因子、机制及应用研究.  相似文献   

3.
为落实《安徽省科技发展“十一五”规划纲要及2020年远景展望》和《合芜蚌自主创新综合配套改革试验区的实施意见》(试行),振兴我省优势传统产业,大力发展高新技术产业,日前,省科技厅决定在重点发展产业(领域)探索建立首席专家制度。即日起面向全省企业、高校、科研院所和事业单位选聘首批十大产业(领域)首席科技专家。  相似文献   

4.
旅游市场结构历来是旅游研究的重要领域之一.本文在简要分析前人研究成果的基础上,以重庆市为例,采用区域内部的客流分布数据,分析了重庆市旅游客流的内部空间结构特征及其演变趋势,并对主城区和三峡两个重点区域的市场地位进行了重点分析.通过分析发现:(1)重庆市客源集中度偏高;(2)主城区接待游客的比重大,其波动对重庆市旅游整体发展的影响显著;(3)三峡旅游对重庆旅游发展的贡献有下降趋势。  相似文献   

5.
调频-差分混沌键移(FMDCSK)是一种以混沌信号作为载波的非相干的调制解调技术,其输出信号具有固有的宽频特性。由于其在对抗多径衰落方面具有显著的效果,它适合于在无线移动通信信道下使用,因而得到广泛的研究。给出了FMDCSK在非平坦衰落信道下的原理结构图,并做了性能分析,通过仿真发现:在两径瑞利(非平坦慢衰落)信道下,FMDCSK的误码性能优于传统的调制解调技术QDPSK和QPSK。为了进一步提高FMDCSK的误码性能,建议结合使用一些有效的技术,如分集、Rake接收机等。这些结论和建议对于促进FMDCSK在无线通信环境下的研究与应用具有重要的意义。  相似文献   

6.
建立了二维周期性纳米磁性颗粒膜的物理模型并求出了其能量,应用玻尔兹曼统计理论计算了磁性颗粒的平均磁矩,讨论了系统铁磁态(FM)和反铁磁态(AFM)转变的温度条件.  相似文献   

7.
文章以小型水电站为研究对象,通过收集、整理、分析其资料和记录,建立设备寿命周期费用(LCC)分解结构和估算数学模型,并应用于实际设备更新改造中,为企业设备管理决策提供量化依据和指导。  相似文献   

8.
在信息时代.软件产业是直接关系国家安全和国际竞争力的战略性先导产业。2000年6月24日.国务院颁布《鼓励软件产业和集成电路产业发展的若干政策》;2002年9月20目,国务院又制定了《振兴软件产业行动纲要》,从多方面采取措施,促进软件产业加快发展。1995年,厦门市委、市政府提出建设厦门信息港.把软件产业作为推动厦门经济发展的新兴产业之一,将软件园的建设视为科教兴市和三港立市(海港、空港、信息港)发展战略的重要组成部分。1998年,出台了《厦门信息港建设“九五”后三年规划和2010年远景目标(纲要)》和《厦门市促进软件产业发展的若干规定》。并决定从市财政筹集1.5亿元作为软件产业基地的建设资金。厦门软件园一期建设由此正式启动。  相似文献   

9.
建设项目全寿命周期管理中的知识集成   总被引:1,自引:0,他引:1  
建设项目全寿命周期集成管理的提出,解决了传统项目管理模式中由于各个阶段脱节产生的弊端.它将决策阶段开发管理(DM)、实施阶段业主方项目管理(OPM)和运营阶段物业管理(FM)进行综合考虑.本文对项目全寿命周期管理中的知识集成进行探讨.  相似文献   

10.
FM全球公司通过其所属的“FM认可”(FM Approvals)机构向全球的工业及商业产品提供检测及认证服务。“FM认可”证书在全球范围内被普遍承认,他向消费者表明该产品或服务已经通过美国和国际最高标准的检测。上海是个国际化的大都市,越来越多的项目想进入国际保险体系,就必须通过FM标准,结合国内的《自动喷琳灭火系统设计规范》,我们最近做了几个类似的纸厂的项目.就其中的一个典型厂区介绍一下.  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.
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   

13.
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   

14.
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   

15.
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   

16.
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.  相似文献   

17.
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.  相似文献   

18.
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   

19.
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.  相似文献   

20.
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   

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