In situ polymerization of aniline in electrospun microfbers简

Conductive microfibers with an average diameter of ca. 1.0 mm were prepared by in situ polymerization of aniline, in which poly(vinylchloride-acrylonitrile)(PVC-AN) was used as the filament-material in electrospinning to form precursor microfibers and carry the aniline monomers. Fourier-transform infrared(FTIR) results demonstrated that PANi was successfully polymerized in the microfibers. The morphology of the PVC-AN-PANi microfibers was observed by scanning electron microscopy(SEM). Results of differential scanning calorimetry indicated that the polymer composite of PVC-AN-PANi formed via molecular interactions. Although the conductivity of PVC-AN-PANi microfibers was still limited(2.2 fi 10à8S/cm), this method provided an effective and convenient approach for preparing highly uniform and soft microfibrous electrodes.     

抗高温蠕变高粘结性共聚酰亚胺应变胶研究

采用两苯酐间连接不同桥基的几种二元酐,与二元胺经溶液共聚合成共聚酰胺酸,两种不同结构的共聚酰胺酸共混再配加适量酚醛树脂,制成棕黄色透明粘稠应变胶.用其胶膜在不同温度下进行热亚胺(固)化反应,测试了形成的半互穿聚合物网络的粘接、蠕变等性能,其中粘结力和抗蠕变性突出.制成的箔式电阻应变计,经老化和蠕变测试达到并超过国家标准的高等级指标.     

三种对抗手机蓝光方法的实际效果测试

手机可以产生很强的蓝光,蓝光对人的眼睛伤害很大。人们经常采用三种方法来减小手机蓝光对眼睛的伤害,分别是帖手机膜、改变手机屏幕背景色和使用手机软件的护眼功能。利用光栅光谱仪对手机膜和手机屏幕背景色的抗蓝光效果进行测试,对一款手机软件的护眼功能进行测试。从实验的结果来看,改变手机屏幕背景色和使用手机软件的护眼功能有一定的消弱蓝光的作用,实验所采用的手机膜没有起到消弱蓝光的作用。     

软BCI-代数的软α-理想

将软集理论应用到BCI-代数的理想中,引进了软BCI-代数的软a-理想的概念,举出实例证明了软BCI-代数软a-理想的存在性.讨论了软a-理想与软理想、软a-理想与软p-理想之间的关系.研究了两个软a-理想的扩展交、限制交以及限制差等性质.给出了软a-理想的扩张性质.     

Sphere-cone-polynomial special window with good aberration characteristic

Optical windows with external surfaces shaped to satisfy operational environment needs are known as special windows. A novel special window, a sphere-cone-polynomial (SCP) window, is proposed. The formulas of this window shape are given. An SCP MgF2 window with a fineness ratio of 1.33 is designed as an example. The field-of-regard (FOR) angle is ±75°. From the window system simulation results obtained with the calculated fluid dynamics (CFD) and optical design software, we find that compared to the conventional window forms, the SCP shape can not only introduce relatively less drag in the airflow, but also have the minimal effect on imaging. So the SCP window optical system can achieve a high image quality across a super wide FOR without adding extra aberration correctors. The tolerance analysis results show that the optical performance can be maintained with a reasonable fabricating tolerance to manufacturing errors.     

不同角度反V型蒸发器变风量下换热性能的研究

机房空调的送风方式主要分为两类,即上送风(V型)和下送风(反V型)。通过焓差实验法研究了机房空调中不同角度反V型蒸发器的换热性能。所研究的角度分别为32.5°、39°、45.5°,并且研究了三种角度蒸发器分别在风量百分比为100%、90%、80%、70%时四种情况下的换热性能。对比分析了各种工况下的制冷量、能效比,并且从蒸发温度以及压缩机的吸、排气温度及压力、冷凝温度等方面分析造成这种差异的原因。研究结果表明,当夹角为39°和45.5°时,蒸发温度约高2℃,系统的换热性能较好。与角度32.5°相比,当风量百分比为100%和90%时,最大制冷量均提高2%左右;当风量百分比为80%和70%时,最大制冷量分别提高5.7%和6%,能效比分别提高了3.5%和6.7%。     

A qualitative approach to aberrations of optical elements

A qualitative method to analyze wavefront aberrations is presented.Aberrations of the primary type,expressed in their matrix forms,are used to write the generalized ray transfer matrix of an optical component.The aberrations were treated collectively by examining the pseudospectra of an augmented matrix constructed from the aberration matrices.Results show that aberrations can be distinguished and relative strengths pronounced using this qualitative method.     

甲硫氨酸席夫碱铜、锌、钴配合物合成及抗O_2~·-性能

合成了邻香草醛甲硫氨酸席夫碱及其铜、锌、钴等配合物 ,通过元素分析、摩尔电导、红外光谱、电子光谱、热分析及电子顺磁共振等手段对它们进行了表征 ,并用 EPR法探讨了它们对O· -2 的清除作用 .结果表明 ,配体与配合物均具有抗 O· -2 性能 ,配合物清除能力比配体强 ,其中铜和钴配合物清除能力最强     

角锥棱镜和柱面镜的技术表述与检测

针对近年来应用颇多的两种较特殊的光学元件——角锥棱镜和柱面（透）镜技术表述的不同形式，为使之逐渐趋于规范和统一，参照国外现行的一些技术要求以及国内公司几年来实施的具体事例，给出若干说明、建议、指标和数据处理方法，尤其推荐用光束平行差的均方差来替代最大光束平行差的指标，是评定角锥棱镜技术特性中一项关键的新指标。     

地震作用多层砌体房屋横墙抗剪分析

分析了在地震作用下，多层砌体刚性楼面的房屋中，490mm,370mm和240mm的抗剪横墙在地震荷载作用下哪一道横墙先破坏取决于墙体负荷宽度，由此，提出了一种横墙抗震验算的直接判别方法，供设计人员参考使用。