高速带式输送机调偏装置的设计

针对带式输送机跑偏问题,根据TRIZ理论对跑偏问题进行技术抽象,从时间轴和因果轴进行了分析.调偏装置适应性与子系统数目、调偏速度与调偏力是带式输送跑偏的技术矛盾.应用PRO/Innovator平台建立带式输送机跑偏模型,得到带式输送机调偏装置的设计方案,利用专家评价模型对方案进行评价,同时设计了带式输送机调偏装置结构.     

综采工作面旋转开采出煤系统改造

针对2341工作面旋转开采出煤系统中皮带输送机过运输巷转角的问题,在回采初期采用两部皮带机搭接完成输煤;当回采至转角位置时,采用将第一部皮带输送机机头部及第二部皮带输送机机尾部拆除并打运出工作面,之后利用改造后的H架、托辊架以及压辊、抗辊等装置将第二部皮带输送机延长至第一部皮带输送机机尾部,组成转弯皮带输送机,构成完整出煤系统的方案。该方案的实施有效地减小了劳动强度,获得了较好的经济效益。     

柴油机各缸供油量不均匀调节ECU硬件在环仿真研究

研究ECU硬件在环柴油机供油量不均匀性控制的仿真问题,基于Matlab/Simulink/RTW及dSPACE系统建立了柴油机供油量不均匀调节ECU硬件在环仿真系统,在Matlab/Simulink中用部分MAP法建立了一个四缸柴油机模型,利用该系统进行了不均匀性油量调节试验.结果表明,采用硬件在环仿真可以方便快捷地对控制系统进行测试,可以通过改变单缸供油量改善柴油机的工作不均匀性.该方法为ECU的测试提供了一种新的手段.     

胶带输送机自动调偏装置的改造

胶带输送机在运转过程中出现跑偏,并对自动调偏装置进行系统改造,胶带输送机在运转中实现自动调偏。     

简述碎玻璃皮带输送系统的电气控制

碎玻璃输皮带送机控制运行系统有继电器、单片机及PLC控制.采用可靠稳定的控制系统,提高皮带生产运营效率,对碎玻璃安全生产起到至关重要的作用.早期的皮带输送机电气控制部分为继电器控制,采用手工的操作方式,安装布线时劳动强度大、工作时能耗高、有故障后维护量大、可靠性差等缺点.该文主要分析了应用PLC控制系统来提高皮带运输系统的安全性和可靠性.     

远程大功率皮带式输送机变频器驱动系统

针对皮带式输送机功率日益增大这一情况,对变频器驱动参数远距离传输控制皮带式输送机的方法进行研究.依据传输线理论建立远距离传输驱动线路电路模型,借助Matlab对影响电动机端部过电压的各种因素进行仿真分析.结果表明,远距离长线传输变频器驱动皮带式输送机控制系统参数传送准确,运行可靠,系统不仅在运行时实现了节能,而且可以兼顾安全和效率.     

煤矿皮带运输的故障与事故处理

皮带输送机是现在煤矿使用最多的运输设备,从操作和工艺上来看均比较简单。加强皮带输送机的使用对提高煤炭运输效率、促进煤炭事业发展具有重要的意义。本文通过对皮带机经常出现的跑偏和断带故障的原因进行分析,重点针对皮带输送机事故,从生产管理和技术管理上采取有力措施,减少或避免皮带输送机事故发生。     

浅析带式输送机胶带的跑偏与调整

本文分析带式输送机胶带跑偏的各种原因和应采取的调整措施;介绍带式输送机常用的几种调偏托辊,并分析调偏托辊的调偏原理。     

带式输送机胶带跑偏浅议

对带式输送机胶带跑偏的各种原因进行了分析,并提出了相应的调偏措施和几种自动调偏方法。     

浅议港口皮带输送系统中的PLC控制

皮带输送机被广泛应用在散装港口的主要生产领域.随着经济和技术的快速发展,传统的皮带输送机的继电器控削系统因存在许多缺陷而退步被淘汰.PLC作为一种重要的现代电子技术基本控制单元,在工业控制领域中应用前景极其广泛.在现代化港口输送系统中,PLC技术在皮带输送系统中的控制也十分普遍.     

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.     

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.     

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.     

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.     

The Analects and the Moment in Peking——The influence of a Confucian education system on the personality formation,the way of thinking and the fate of the main characters

0.Preface China has long been boasting of its colorful and immense culture which comprises of Taoism,Confucianism and Buddhism.The interwoven influence among the religions on Chinese way of thinking,on the nation＇s behavior in their social life throughout the long history is beyond list.