面向智能控制的软PLC逻辑控制单元模块化设计与实现

为了采用软件实现硬件的功能,改变依靠硬件模块的产品序列化方式。在介绍软PLC系统主要功能与模块的基础上,针对软PLC的逻辑控制单元的可视化设计与实现,给出了控制单元的图形显示、逻辑功能实现、以及数据关联的设计,最后介绍了逻辑控制单元可视化实现效果。     

集对逻辑及其运算定律

解决现行的集对联系函数四则运算中存在的不确定性问题与逻辑谬误.分析联系函数与模糊隶属函数在表达事物之间联系的相似性,借鉴模糊逻辑的基本方法,定义了以联系度为真值形式的集对命题,进而给出集对逻辑的析取、合取、取否运算法则,建立了集对逻辑的基本框架.在此基础之上,分析了集对逻辑运算的七大运算定律:对合律、幂等律、交换律、结合律、分配律、吸收律和摩根律,由此证明集对逻辑运算构成的代数(S,,,)为软代数.     

农机油料使用的管理技巧原则

<正>柴油沉淀48小时后使用:柴油中的杂质多半是土粒、灰砂、岩石粉和微小的尘土等。这些杂质的主要成分是磺和矾土。如果柴油不经过沉淀、过滤等净化处理,而直接进入燃油系统中使用,即使是很小的杂质进入柱塞副、出油阀、喷油器后,也会在高压和高速下,像磨料一样磨削精密零件的表     

淮南矿区深部岩巷典型围岩参数反分析研究!

基于典型巷道的表面收敛位移,通过进化神经网络方法进行了淮南矿区典型围岩类型的物性参数反分析研究.采用反分析得到的参数,通过数值正分析得到了和实测基本吻合的深部位移结果.表明通过反分析研究,基本得到了反映典型围岩类型的物性参数.     

浅谈油田动液面软测量

本文将两种自适应算法与传统AOSVR相结合,提出了一种改进的AOSVR,该方法能够在线更新SVR模型,同时还能对惩罚参数、不敏感函数参数以及核函数参数进行实时调整,从而提高算法的自适应能力及预测量精度。通过实验表明基于AOSVR的油田动液面软测量方法可以在油田动液面测量中加以应用。     

铸锡青铜表面软氮化前后／40CrNiMo的摩擦磨损性能研究

气体软氮化工艺是20世纪70年代在液体软氮化的基础上发展起来的一种新工艺。能充分发挥金属材料潜力,保证和提高产品质量,对于铸锡青铜表面软氮化后摩擦磨损作用机理的研究目前还没有。本文在ZCuSn10Pb1基体表面进行软氮化处理,与40CrNiMo组成滑动摩擦副,在M一2000型磨损试验机上进行了干摩擦工况下的滑动摩擦磨损试验研究,并根据试验数据和现象对ZCuSn10Pb1涂层的摩擦磨损性能和滑动摩擦磨损机理进行了研究。以便为各个领域应用ZCuSn10Pb1涂层提供理论依据。     

软岩流变的尺寸效应

岩体内随机分布结构面对软岩流变的影响主要表现为尺寸效应.通过对四种不同尺寸砂质页岩试件的分级增量循环加、卸载单轴压缩蠕变实验,揭示了该类软岩的流变可以用萨乌斯托维奇模型来描述,模型的三个本构参数EH(线弹性参数)、EK(黏弹性参数)和ηK(黏性系数)值随软岩试件尺寸增大而不断减小并最终趋于一定值,这一规律可用具有极值条件的非线性回归方程来表达.由此获得了求解结构面随机分布条件下工程岩体连续微元尺寸的外推方法,利用该法可通过对室内不同尺寸岩石试件的流变力学实验确定在连续性概化范围内工程岩体的流变模型及其力学参数值.     

Making continental crust: The sanukitoid connection

The average continental crust possesses intermediate compositions that typify arc magmatism and as a result it is believed to have been created at ancient convergent plate boundaries. One possible mechanism for intermediate continental crust formation is the direct production of andesitic melts in the upper mantle. Sanukitoids, which characterize the Setouchi volcanic belt, SW Japan, include unusually high-Mg andesites （HMA）. They were generated by slab melting and subsequent melt-mantle interactions under unusual tectonic settings such as where warm lithosphere subducts into hot upper mantle. Such conditions would have existed in the Archean. Hydrous HMA magmas are likely to have solidified within the crust to form HMA plutons, which were then remelted to produce differentiated sanukitoids. At present, generation and differentiation of HMA magmas may be taking place in the Izu-Bonin-Mariana arc-trench system （IBM）, because （1） HMA magmatism characterizes the initial stages of the IBM evolution and （2） the IBM middle crust exhibits Vp identical to that of the bulk conti- nental crust. Vp estimates for plutonic rocks with HMA compositions support this. However tonalitic composition for middle-crust-forming rocks cannot be ruled out, suggesting an alternative possibility that the continental crust has been created by differentiation of mantle-derived basaltic magmas.     

Lasing on pyroclastic rocks: A case study of <Superscript>40</Superscript>Ar/<Superscript>39</Superscript>Ar dating on Moshishan Group,eastern Zhejiang Province

It is difficult to date pyroclastic rocks, for almost all the dating methods, due to the multiple sources during their formation. ^40Ar/^39gAr incremental heating results on groundmass selected from the samples show that the age spectra are meaningless geologically. However, singe crystal total fusions of CO2 lasing on the sanidine separates could yield rational 4^40Ar/^39Ar results and distinguish their sources in this study. Timing on three formations of the Moshishan Group, after avoiding the exotic and altered grains by lasing on the single sanidine separate, was reported in this paper. The lowermost portion of the Chawan Formation gives an age of 113.7±0.3 Ma; the lower part of the Xishantou Formation was formed 116.4±0.4 Ma ago and the bottom of the Gaowu Formation took its shape at 118.4±0.4 Ma. These new ages are much younger than the previous ones, suggesting that these thick volcanic formations had been formed in very short durations.     

Petrographic and geochemical characterization of seep carbonate from Alaminos Canyon,Gulf of Mexico

Seep carbonates were collected from the Alaminos Canyon lease area, Gulf of Mexico. The carbonates are present as slabs and blocks. Bivalve shell and foraminifer are the dominant bioclasts in carbonate. Pores are common and usually filled with acicular aragonite crystals. XRD investigation shows that aragonite is the dominate mineral （98%）. Peloids, clotted microfabirc and botryoidal aragonite are developed in carbonate and suggest a genesis linked with bacterial degradation of the hydrocarbons. The δ^13C value of bioclasts in carbonate is from -4.9‰ to -0.6‰, indicating that the carbon source is mainly from sea water as well as the small portion incorporation of the seep hydrocarbon. The microcrystalline and sparite aragonite shows the δ^13C value from -31.3‰ to -23.4‰, suggesting that their carbon is derived mainly from microbial degradation of crude oil. ^14C analyses give the radiocarbon age of about 10 ka. Rare earth elements （REE） analyses of the 5% HNO3-treated solution of the carbonates show that the total REE content of the carbonates is low, that is from 0.752 to 12.725 μg·g^-1. The shale-normalized REE patterns show significantly negative Ce anomalies. This suggests that cold seep carbonate is most likely formed in a relatively aerobic environment.