浅谈我国轧钢生产节能降耗技术及合理化建议

文章阐述了加热炉节能、连铸坯热送热装、低温轧制与轧制工艺润滑、在线热处理等先进技术，并指出轧钢生产的节能重点应落在轧钢加热炉的节能上，最后对轧钢生产节能降耗提出几点建议。     

轧钢机械设备的故障监测与诊断研究

机械振动是轧钢机械常见的故障之一。轧钢机械振动故障是影响轧钢生产的重要因素之一,同时对轧钢机械的生产过程中的安全问题也有着重要的影响。轧钢机械在运行过程中,采用在线检测和在线诊断系统来确定轧机振动故障的发生,并分析轧机振动故障的原因。为了提高轧机的生产和运行效率,必须加强对轧机振动故障的监测与诊断。     

PLC控制系统在轧钢车间水处理中的应用

轧钢车间水处理自动控制系统是轧制生产线控制系统中关键而又相对独立的系统,针对其重要性和生产现场的复杂性,本文结合方大特钢60万吨优钢轧钢生产线水处理的工艺特点,概述了轧钢车间水处理PLC控制系统的组成及人机接口界面的功能。     

自适应控制策略在液位系统中的实现

以拓展学生的实验教学平台为目的,应用三菱Q系列PLC分别设计过程控制系统的PID控制器以及自适应PID控制器,实现二阶水槽的液位控制。通过应用三菱PX-Developer开发工具实现PID控制器和自适应PID控制器的编程、运行以及在线调试。根据所得过渡过程曲线,对比两种控制策略的控制性能,阐述教学实践环节的应用,使学生理解控制器参数的意义。结果得以证明所应用的自适应PID控制策略的优越性,为培养学生的自主创新能力奠定了基础。     

技术需求

正船舶小组立结构智能生产线研发——投资预算1000万元行业分类:制造业所属地区:浙江省舟山市有效期:截至2016-09-30联系人:王玉平联系方式:18681979560遇到技术难题内容:本项目以船体结构小组立件为生产对象,通过研究小组立智能生产线总体设计技术、在线编程技术以及集成与调试技术,构建一条小组立智能生产线,实现小组立的智能化焊接和高效生产作业。专题一:小组立智能生产线总体设计研究本专题主要针对船厂的场地情况、生产对象及产能计划对小组立智能生产     

轧钢生产中节能技术分析

轧钢生产耗能占全国的能耗大,节能的潜力很大。推进轧钢技术进步是继续进行生产节能的关键。文中介绍了加热炉节能、连铸坯热送热装、低温轧制与轧制工艺润滑、在线热处理等先进技术,并指出轧钢生产的节能重点应落在轧钢加热炉的节能上。     

城市单路口交通信号两级模糊优化控制与仿真

该文提出交通信号两级模糊控制的两种优化方法.首先,针对两级模糊控制器在低流量下考虑多维交通状态变量致使路口交通状态弱化,提出一种两级组合模糊控制器,其采用0-1组合思想,立足路口交通状态特征选取模糊控制器的交通状态变量的组合及结构.接着,针对模糊控制器参数经验设置及不具备学习能力,提出一种两级模糊在线优化控制器,其引入滑动时间窗思想,采用混合遗传算法在线同时优化模糊控制器隶属函数和控制规则的参数;最后,开发两级模糊在线优化控制的Paramics仿真平台,对两种模型进行效用评价;仿真结果表明所提出的方法分别从模糊控制器结构和参数优化的角度改进了两级模糊控制器的不足,控制效果符合交通管理者的控制目标.     

止水带在线截面检测系统的设计与实现

针对现有自粘式橡胶止水带生产工艺,设计了一种自粘式橡胶止水带在线截面检测系统。该系统能够实时检测止水带的截面轮廓尺寸,为挤出机参数调节提供依据,同时为自粘胶涂布工序提供位置信息。该系统通过多个激光传感器采集止水带得部分截面参数和涂胶位置信息,由控制器将多个激光传感器的数据进行整合处理,形成完整的止水带截面参数和涂胶位置信息。同时,将数据传送给生产线主控制系统。在某生产企业协助下,将该系统集成于原有橡胶止水带生产线上,并进行了稳定性试验,总结了在线截面检测系统的设计参数及避免激光传感器发生故障的方法,为自粘式橡胶止水带的生产提高了效率、减少了浪费,并为该系统的优化设计提供依据。     

基于"龙腾"R2 的在线调试系统的设计

在JTAG工业标准的基础上,为"龙腾R2"微处理器提出了一种在线调试系统的实现方案.通过扩展JTAG的TAP控制器,并在微处理器内部加入控制模块,实现了软件调试的单步执行、硬件断点、软件断点及监控和修改寄存器及存储器等多种片上调试功能.以较小的硬件开销,获得了较大的调试功能.     

基于递归神经网络的多变量系统预测控制

针对线性PID控制器系数难以整定的问题，构造了一种用神经网络实现的非线性PID控制器．多个具有相同结构的非线性PID控制器并联，对多变量系统实现解耦控制器．结合预测控制的思想，提出两种控制方案．第一种是在递归多步预测的基础上，在广义最小方差目标函数下实现控制，第二种利用多步预测目标函数在线修正解耦控制器的权值．仿真实验表明这两种方法的有效性．     

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.