LIPN聚氨酯/聚丙烯酸酯引发体系的研究

探讨了各种引发体系对ＬＩＰＮ聚氨酯（ＰＵ）／聚丙烯酸酯（ＰＡ）合成过程的稳定性、粒子形态及单体转化率的影响。实验表明采用油溶性引发剂ＡＩＢＮ可得到粒子均一,稳定性好且单体残留量很少的乳液;其粒子形态为“翻转”型核壳结构     

PVC／PBA和PS／PBA两种LIPN的性能与相容性

通过对ＰＶＣ／ＰＢＡ（聚氯乙烯／聚丙烯酸丁酯）和ＰＳ／ＰＢＡ（聚苯乙烯／聚丙烯酸丁酯）两种ＬＩＰＮ的玻璃化转变温度Ｔｇ和动态力学等性能的测定，比较了它们的相容性和阻尼性能。实验结果表明ＰＶＣ／ＰＢＡＬＩＰＮ的相容性和阻尼性能较ＰＳ／ＰＢＡＬＩＰＮ更好     

“智能型”聚N—异丙基丙烯酰胺相变行为对外加盐的？…

通过自由基聚合法合成了温度敏感聚Ｎ－异丙基丙烯酰胺（ＰＮＩＰＡＭ）和苊烯（ＡＣＥ）标记的聚Ｎ－异丙基丙烯酰胺（ＰＮＩＰＡＭ／ＡＣＥ）,系统考察了外加盐对ＰＮＩＰＡＭ水溶液最低临界溶解温度（ＬＣＳＴ）的影响。实验表明,随外加盐浓度的增加,ＰＮＩＰＡＭ水溶液的ＬＣＳＴ降低,降低程度不仅与体系的离子强度有关,而且与外加盐的本性有关。荧光各向异性研究表明盐的加入降低了ＰＮＩＰＡＭ链的柔性,从而使其相变温度     

聚氨酯／聚丙烯酸酯类胶乳互穿聚合物网络的研制—乳胶粒径与原料配比的关系

本文讨论了聚氨酯（ＰＵ）／聚丙烯酸酯（ＰＡＡ）类胶乳互穿聚合物网络（ＬＩＰＮ）粒径与原料配比的关系。试验结果表明影响ＰＵ／ＰＡＡＬＩＰＮ的粒径的关键因素是亲水基团（ＣＯＯＨ）的含量以及成盐率     

运算放大器在船舶电气中的应用

运算放大器在船舶电气中的应用徐建华（浙江水产学院机械系，舟山３１６１０１）ＡＮＡＰＰＬＩＣＡＴＩＯＮＯＦＯＰＥＲＡＴＩＯＮＡＬＡＭＰＬＩＦＩＥＲＩＮＳＨＩＰＥＬＥＣＴＲＩＣＩＴＹＸｕＪｉａｎｈｕａ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｃｈｉｎｅｒｙ，ＺＦＣ，...     

POLYCYCLE－COMPOUNDING STRUCTURES AND REGIONAL LAYERSLIP－DIPSLIP SYSTEMS：IMPLICATIONS FOR THE TARIM BASIN，XINJIAN

ＰＯＬＹＣＹＣＬＥ－ＣＯＭＰＯＵＮＤＩＮＧＳＴＲＵＣＴＵＲＥＳＡＮＤＲＥＧＩＯＮＡＬＬＡＹＥＲＳＬＩＰ－ＤＩＰＳＬＩＰＳＹＳＴＥＭＳ：ＩＭＰＬＩＣＡＴＩＯＮＳＦＯＲＴＨＥＴＡＲＩＭＢＡＳＩＮ，ＸＩＮＪＩＡＮ￥ＳｕｎＹａｎ；ＪｉａＣｈｅｎｇｚａｏ（Ｄｅ...     

东湖细菌生理群间的相关性和优势生理群的分析

研究了武汉东湖异养菌（ＨＢ）及７种细菌生理类群（产淀粉酶细菌（ＡＢ）、产蛋白酶细菌（ＰＢ）、产脂肪酶细菌（ＬＢ）、有机磷细菌（ＯＰＢ）、无机磷细菌（ＩＰＢ）、硝化细菌（ＮＢ）及反硝化细菌（ＤＮＢ））间的相关性。统计分析表明,ＨＢ、ＡＢ、ＬＢ、ＰＢ、ＤＮＢ彼此呈正相关,而这几种类群与ＮＢ、ＩＰＢ、ＯＰＢ呈负相关。根据异养性细菌生理群与ＨＢ比值的百分率,ＬＢ可谓东湖春季优势生理群,ＡＢ为秋季优势生理群。     

反应注射成型聚氨酯／乙烯基酯树脂互穿聚合物网络的形态及力学性能──添加工业接枝聚醚多元醇

将不同比例的聚环氧丙烷三元醇和工业生产的接枝聚环氧丙烷三元醇混合，与甲苯二异氰酸酯（ＴＤＩ）或碳二亚胺改性二苯基甲烷二异氰酸酯（Ｌ－ＭＤＩ）快速反应，合成了两类聚氨酯／乙烯基酯树脂互穿聚合物网络（ＩＰＮ）。用扫描电镜观察了它们的拉仲断面以及经ＤＳＣ的测定，结果表明，添加少量工业接枝聚醚多元醇，由ＴＤＩ合成的ＩＰＮ，其两个网络间的相容性有较显著的改善，显示出好的拉仲性能。然而，Ｌ－ＭＤＩ合成的ＩＰＮ，随工业接枝聚醚多元醇的加入，网络间的相容性变差，拉伸性能有所下降。     

唐山奶山羊成年母羊体重及体尺性状的相关分析(简报)

唐山奶山羊成年母羊体重及体尺性状的相关分析（简报）刘金福李祥龙田庆义冯敏山马国强（河北农业技术师范学院动物科学系，昌黎，０６６６００）郭润民郝学贵（河北省昌黎县畜牧局）ＡＮＡＬＹＳＩＳＯＦＣＯＲＲＥＬＡＴＩＯＮＳＨＩＰＢＥＴＷＥＥＮＢＯＯＹＷＥＩＧＨ...     

PU与PVAc互穿网络聚合物的研究

研究了蓖麻油聚氨酯（ＰＵ）与聚醋酸乙烯酯（ＰＶＡｃ）在室温下生成的互穿网络聚合物（ＩＰＮ）。通过ＦＴ－ＩＲ和凝胶含量的测定,说明此种ＩＰＮ是接枝型ＩＰＮ。考察了该ＩＰＮ的各种组成对带锈铁板的附着力、柔韧性、冲击强度以及搭接剪切强度的影响。结果表明,当ＰＵ／ＰＶＡｃ＝５０／５０（ｗ／ｗ,质量比）时,ＩＰＮ的剪切强度最大,在此条件下合成的ＩＰＮ涂料是带锈铁板的良好涂料。     

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.     

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.     

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-