层压板单搭接胶接结构损伤失效行为表征分析

为指导层压板胶接结构设计,提高层压板胶接结构的稳定性,基于ABAQUS软件及其用户自定义场变量子程序(USDFLD)和内聚力单元,建立了同时考虑层压板与胶层损伤与失效的层压板单搭接胶接结构的数值分析模型,模型预报结果与试验结果基本吻合.基于该模型对层压板单搭接胶接结构进行应力分析与承载能力影响因素分析,结果表明:胶接结...     

以紫薯为基质的保健型果冻研制及工艺优化

以紫薯粉为主要原料,以卡拉胶、黄原胶和果胶构成复配胶,研究紫薯果冻配方及工艺。利用混料设计确定复配胶的最佳配比,将混料设计与响应曲面优化结合探究紫薯保健果冻的优化配方,同时在优化工艺基础上与市售产品进行感官和理化指标的比较。结果表明:复配胶最佳配比为ω(卡拉胶)∶ω(黄原胶)∶ω(果胶)=50.98∶29.00∶20.00;果冻优化配方为ω(紫薯粉)22.00%、ω(复配胶)2.81%、ω(白砂糖)11.25%、ω(L-苹果酸)0.15%。基于优化配方下生产的紫薯果冻口感酸甜适宜、紫薯风味浓郁、质地细腻有弹性;感官评价结果表明,消费者对紫薯果冻及其他市售产品无明显喜好度差异。     

基于MCS-51的智能点胶机设计

介绍一种基于MCS-51单片机核心开发的的智能点胶机控制系统设计方案,该型点胶机在老式点胶机基础上进行了多项改进,增加了新的功能。该型点胶机主要特点是:胶筒双层固定,增加了针头的稳定性;工装底座可定位锁紧,位置固定;点胶圈数和速度可根据需要自行设置参数调节;点胶气压由自制出胶控制盒控制。该设备采用MCS-51单片机控制,操作简单,通用性强,可满足不同产品、不同浓度胶液的点胶需要。     

大庆龙西油田高台子油层系统保护技术研究

大庆龙西油田高台子油层为一高含泥低渗透油藏．为高效开发该油田,从研究油层的敏感性着手,系统研究了入井流体对油层岩心的伤害,提高了使用强抑制复合离子聚合物水基钻井液、 Ｐ Ｔ Ａ 和 Ｋ Ｃｌ保护射孔液、 Ｂ Ｃ Ｓ－ ８５１ 瓜胶压裂液、 Ｋ Ｃｌ保护修井液及综合注水质控制等系统技术,大大提高综合开发效宜．     

混料设计优化功能性小米早餐粉的配方

以小米、黄豆、核桃、葡萄皮、白砂糖和黄原胶为原料研制了一种即食早餐粉,采用混料设计研究了配方中各成分比例对其感官质量的影响,建立各组分配比与感官质量之间的回归模型,分析配方中各成分的互作效应,获得的最优配方为:小米27.76%、黄豆20.00%、核桃仁19.70%、葡萄皮5.00%、白砂糖24.44%、黄原胶3.00%。检测发现,最优配方早餐粉具有一定的自由基清除功效,有较高的抗氧化能力。     

新资源食品提取物辅助降血糖配方的确定

以α-葡萄糖苷酶抑制剂体外模型实验筛选出4种具有较强活性的新资源食品提取物原料,进行混料配方优化设计,获得较优配方比例为:青钱柳提取物26.05%,葡萄皮提取物10.00%,桑叶提取物22.13%,枇杷叶提取物41.82%。采用高浓度葡萄糖刺激HepG2细胞体外降血糖评价模型对优化配方进行功能评价,结果显示配方可显著提高胰岛素抵抗模型的葡萄糖利用率,对造成的胰岛素抵抗具有一定的改善作用,且呈现一定的浓度依赖效应。     

东方1-1气田低渗疏松砂岩气藏伤害机理研究

低渗疏松砂岩气藏不仅具有常规低渗气层孔喉细小、敏感性矿物含量高、毛细管压力大的特点,同时储层胶结疏松,在钻完井、开发过程中易受到损害。以南海DF1-1气田低渗疏松砂岩气藏为研究对象,针对气藏自身特点并结合现场施工工艺,改进了石油天然气行业标准对工作液伤害的评价方法,并系统评价了气藏的伤害机理。研究结果表明:PRD钻完井液体系对气层主要损害机理为有机固相堵塞和水锁;生产过程中微粒运移伤害程度弱。改进后方法的评价结果更加符合现场生产实际。建议在后期开发井钻完井设计中优化PRD钻井液体系配方,加入5%粗粒刚性封堵颗粒,有效降低有机固相、液相侵入程度;增加完井液中破胶剂用量至6%,提高破胶效率。     

胶印机匀墨胶配方改进的研究

以环保无毒物质柠檬酸三丁酯（TBC）为增塑剂，聚氨酯为胶液，研制了一种无毒环保的胶印机匀墨胶的新配方．分别在匀墨棒上用新配方和原配方进行上胶，比较匀墨棒上胶后的性能及固化时间．结果表明，采用新配方所做的匀墨胶层制件拉伸粘合强度优于原配方且手感光滑，经厂家试用，效果良好．     

西门子PLC在全自动混料系统中的应用及升级

本文主要介绍以西门子S5-155UPLC为控制主站,以4个S5-95U,1个TD 17,3个S5-ET200,2个S7-ET200M为现场控制从站,经PROFIBUS总线连接组网,与人机界面相联,组成一个功能强大的全自动混料控制系统,该系统已成功运行10年。另外介绍因公司的发展需要,再上一套混料系统,选用西门子S7-400PLC为新的控制核心,把原有S5控制系统升级,纳入S7-400控制系统中,新控制系统的功能更强大,更先进。     

高初粘强度鞋用聚氨酯胶粘剂固化剂的研制

研制了几种合成聚氨酯胶粘剂的固化剂，探讨了固化剂在提高聚氨酯胶粘剂初粘强度方面的应用，以及最佳胶液配方和粘接条件。     

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.     

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.     

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.     

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.     

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the