ABB UP6工业机器人在玻璃自动码垛系统中的应用

ABB工业机器人用途广泛,具有机器人的典型特点.本文介绍了这种工业机器人在玻璃生产线自动堆垛系统中的应用及其辅助装置的设计.     

多种类货物的智能仓库机械系统设计

针对揭阳市某企业的智能仓库中存在的搬运阶段复杂的工作任务问题和劳动强度大的难题.设计智能仓库改造方案,对搬运阶段中使用的堆垛机和货叉进行改进设计,确定堆垛机和货叉的性能参数和结构形式.堆垛机的设计包括堆垛机的水平行走机构,垂直升降机构和货叉,对货架水平横梁的挠度分析与校核.运用ANSYS有限元分析软件对堆垛机货叉进行了...     

基于编码电缆的自动化立体仓库的地址检测

采用编码电缆位移传感器作为立体仓库位置检测元件,直接将一条传感器安装在轨道旁检测堆垛机大车水平方向的地址,另一条传感器安装在堆垛机立柱上检测堆垛机小车垂直方向的地址,能够方便地导引堆垛机驶入狭长的仓储巷道.由编码电缆位移传感器导引堆垛机组成的自动化立体仓库系统可以有效解决红外线导引堆垛机导致前后运行精度较低、反射板的布置困难以及反射光线之间相互干涉等技术难题,提高立体仓库堆垛机的水平方向和垂直方向定位精度和稳定性,减少一些外在因素引起的系统误差,实现物料输送的智能自动化.     

新型高速重载堆垛机器人运动系统设计

针对高产量铝锭堆垛生产线上高速重载堆垛工况,研究设计一种新型5自由度串并混联机构的堆垛机器人.该机器人本体结构模块采用由并联机构和串联机构闭环运动链组成的运动系统方案.通过对系统有关结构参数化建模、运动学特性的理论分析、运动仿真的虚拟实验及有限元分析,机器人运动系统能够很好的满足堆垛机对自由度、工作空间以及复杂堆垛轨迹的要求,承载力得到大幅度提升,可满足铝锭堆垛高速重载的堆垛要求.     

ABB UP6工业机器人在玻璃自动码垛系统中的应用

ABB工业机器人用途广泛,具有机器人的典型特点。本文介绍了这种工业机器人在玻璃生产线自动堆垛系统中的应用及其辅助装置的设计。     

铝锭堆垛机翻转装置主轴的瞬态动力学分析

铝锭堆垛机是铝锭连铸生产线的关键设备,铝锭堆垛机的性能已经成为制约铝锭连铸生产线高效性和自动化的瓶颈技术。针对铝锭堆垛机翻转装置翻转铝锭过程中存在的冲击大、翻转过程不平稳等问题,研究了翻转装置主轴的动态特性。通过Pro/e建立了主轴的三维实体模型,考虑了轴承对主轴的约束、伺服电机施加给主轴的动态变化扭矩等,运用有限元分析软件ANSYS对主轴进行了瞬态动力学分析,计算出了翻转装置主轴在动态变化扭矩作用下翻转铝锭的位移、速度、加速度响应。分析结果表明运用伺服电机驱动翻转装置翻转铝锭有效减小了翻转机构在两个极端位置的冲击,提高了翻转过程的平稳性,也为进一步改进该结构进而提高堆垛机的效率提供了一定的理论依据。     

基于ANSYS的堆垛机立柱刚度的分析

堆垛机结构的优劣直接影响自动化立体仓库的可靠性和效率,传统经验设计方法很难掌握堆垛机立柱结构力学性能.采用有限元方法分析堆垛机立柱和下横梁的刚度,为堆垛机结构设计提供了一种行之有效的分析方法.     

基于遗传算法的堆垛机结构多目标优化设计

堆垛机是物流仓储的主要设备,运用现代设计方法和手段,实现堆垛机的参数化设计对提高设计工效、缩短设计周期、保证产品质量具有现实意义.在堆垛机静态工作条件下,以跨距及立柱距后轮距离为设计变量,立柱刚度和下横梁强度最大为优化目标,建立了堆垛机的优化模型,采用遗传算法对模型进行了优化设计,优化后的下横梁跨距减少9.74％,立柱距后轮距离减少3.29％,立柱挠度减少0.91％.     

单片机在玻璃自动计数系统中的应用

玻璃自动计数系统以AT89C2051单片机为核心,通过在玻璃生产线上安装的光电开关和接近开关传感器来自动检测玻璃厂生产的玻璃数量和横切刀横切次数,然后利用单片机将检测到的这些数据通过RS485通信传给上位机进行分析、存储和打印.上位机平台由组态王软件设计完成.该文详细介绍了单片机进行数据采集和与上位机的串行通讯部分,并给出了硬件电路和软件程序.     

运动玻璃等级标记的在线提取和识别

为了识别浮法玻璃生产线上玻璃的等级标记 ,实现玻璃的自动化分等级堆垛 ,本文提出了运用减影的方法提取运动玻璃上的等级标记 ,并提出了一种基于膨胀的识别目标的新方法 ,此方法源于在包含标记的二值图象中 ,从标记区到背景区黑色象素点 (灰度值为零 )的个数大幅度减少的现象。玻璃等级动态在线识别系统的应用实践表明 ,本文提出的方法运算速度快 ,标记的识别率高     

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.     

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.     

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.     

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。     

On Tragic Consciousness In The Works By Ernest Hemingway

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-