氧冷等离子体处理对饰面中密度纤维板甲醛释放量的影响

采用氧冷等离子体处理中密度纤维板,贴面后测定其不同氧冷等离子体处理条件下的甲醛释放量,并探讨氧冷等离子体处理降低饰面中密度纤维板甲醛释放量的机制。结果表明:经氧冷等离子体处理后,饰面中密度纤维板甲醛释放量显著下降,下降率最大达33.14%。氧冷等离子体处理降低饰面中密度纤维板甲醛释放量的机制主要有:饰面中密度纤维板经氧冷等离子体处理后,表面结合强度增大,增强了饰面材料对基材的封闭作用,减少了基材中甲醛对外释放的通道;氧冷等离子体改性过程中的抽真空工艺会使基材中部分游离甲醛被吸出,从而使贴面后的产品甲醛释放量有所下降;氧冷等离子体处理时产生的高能粒子及活性基团对甲醛具有分解作用。     

难燃性饰面中密度纤维板的研究

研究了难燃性饰面中密度纤维板（ＭＤＦ）的阻燃机理及研制方法，通过正交试验进行配方设计，确定了最佳阻燃胶粘剂的涂刷量。处理后的饰面ＭＤＦ阻燃性能可达ＢＧ８６２５－８８标准中的难燃（Ｂ１）级。     

稻秸/木材密度纤维板的复合工艺及其性能

分析了稻秸木材复合工艺配比及防水剂的添加量(0.8%、1.2%、1.6%、2.0%)对稻秸木材复合中密度纤维板性能的影响。结果表明:采用稻秸与木材原料分别进行纤维分离,再混合后施胶的复合工艺,当草木配比为1∶1,防水剂加量为1.2%,脲醛树脂胶粘剂的施胶量为12%时,生产出的稻秸/木材中密度纤维板,除吸水厚度膨胀率外,各项性能均能达到中密度纤维板标准要求。     

中密度纤维板热压工艺分析的研究

中密度纤维板的广泛应用,对满足人民生活需要、节约森林木材资源等方面起到了巨大作用。介绍了中密度纤维板热压成型工艺的基本原理,采用试验研究的方法,研究了传统的热压成型工艺技术,对传统热压工艺存在的问题进行了分析,也即采用什么方法来保证成型厚度和保压压力的设置值设置为多少合适,并相应的提出了改进措施。     

耐硫甲烷化催化剂的成型工艺探究

采用挤出法对Ce O2-Al_2O_3载体和MoO_3/ZrO_2催化剂进行了成型处理并研究了成型工艺对高温、低温催化剂耐硫甲烷化性能的影响,考察了不同成型助剂对负载型Mo基催化剂成型效果和耐硫甲烷化活性的影响,并对所制备的成型催化剂进行稳定性考察.结果表明,铈铝复合载体的适宜成型条件是水粉质量比约0.45~0.55、黏合剂为10%,(质量分数,下同)的拟薄水铝石,胶溶剂为10%,的硝酸,润滑剂为1%,的田菁粉;MoO_3/ZrO_2低温催化剂的成型工艺条件是拟薄水铝石添加量为10%,,硝酸添加量为5%,,田菁粉添加量为1%,.在此条件下制备的高温和低温成型催化剂均具有良好的稳定性,这为耐硫甲烷化催化剂的工业放大研制提供了重要依据.     

膨胀珍珠岩保温材料的制备与性能

目的研究膨胀珍珠岩保温材料的制备工艺,解决传统珍珠岩保温材料吸水严重等问题.方法以膨胀珍珠岩为主要原料,添加无机-有机胶黏剂,用40 mm×40 mm×120 mm模具在SVC-4500VA压力机上模压成型,在干燥设备内烘干制得试样.测试其导热系数、抗压强度、憎水率等性能,初步探索制作工艺.结果试验表明在胶黏剂掺量为7%~10%,成型压力为0.36 MPa时,试样的导热系数为0.058 W/(m·K),抗压强度为0.4 MPa,憎水率为98%,防火等级为A级,符合GB/T 5464-2010/ISO 1182:2002中的规定.结论胶黏剂的掺量是制备试样强度的主要因素,随着胶黏剂掺量的增加,试样的强度和导热系数均逐渐增加;随着胶黏剂中有机组分的增加,试样的憎水率逐渐提高;在一定范围内,试样的导热系数随着成型压力的增加而降低,当超过某一阈值时,随压力的增加而增大.     

南京林业大学科技成果简介：（四）南方型杨树（意杨）木材加工技术研究与推广

围绕意杨全树利用,系统研究了意杨的材性特征及其与加工利用的关系,针对意杨单板干燥翘曲变形和难以胶合、超厚板坯传热慢、杨木中密度纤维板甲醛释放量严重超标,以及杨木小径材结构人造板制造等技术难题,提出了组合式干燥系统、蒸汽喷射技术、氨气真空处理降醛方法和杨木定向结构板柔性生产体系,成功开发了以杨木为原料的胶合板、中密度纤维板、刨花板、水泥模板、单板层积材、定向结构板,以及超厚型高中密度纤维板等多种杨木新产品,并研制了系列化成套设备,获得专利15项,填补了多项空白,     

俄罗斯年产八万立方米中密度纤维板生产线电气设备与自动控制系统

俄罗斯中密度纤维板生产线是北方重工沈阳重型机械集团有限责任公司对外贸易出口的项目之一,合同于2007年执行。该生产线设计产量为8万立方米/年中密度纤维板,中密度纤维板的计算密度为710Kg/m3,板厚8-25mm,幅面为1220mm×2440mm。     

江苏杨木人造板的研发与展望

在总结江苏杨木加工产业现状的基础上，分析了存在的不足，提出了具有发展强势的人造板产品，包括杨木单板层积材、杨木水泥模板、杨木复合地板、杨木人造薄木、竹木复合层积材、超常厚度中密度纤维板、草木复合中密度纤维板、软质纤维（碎料）板、定向结构板、木（草）塑复合材料、杨木木丝墙体材料和废旧木材人造板等。指出了实现人造板产业持续发展的保证措施，包括优化资源供应，重视无醛胶粘剂的研发，加强木材保护技术的研究，突出技术创新，实施人才、专利和标准战略。     

软锰矿浆脱硫尾渣用作免烧砖试验研究

利用河池地区软锰矿浆脱硫尾渣生产新型建筑材料免烧砖,探索制作尾渣免烧砖的配料比、成型压力以及养护时间等影响免烧砖性能的最佳工艺条件.实验结果表明:高达95%的软锰矿浆脱硫尾渣粒度粒径在80μm以下,颗粒较细,是较好的制备非烧结砖的材料."软锰矿浆烟气脱硫副产尾渣—水泥胶凝材料—水"体系是较好的配料方案.在配料比等其他工艺条件相同的情况下,抗折与抗压强度的大小随着成型压力的增大而增大.随着黏结剂添加量的增加,免烧砖试样的抗折与抗压强度得以增加;当黏结剂添加量增加到一定程度时,抗折与抗压强度反而降低.综合以上因素得出免烧砖制品的最佳工艺参数是:脱硫尾渣∶胶凝材料=5∶1,成型压力为20 MPa;含水率为10%,自然养护时间控制为7~28 d.     

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.     

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.     

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