新催化剂合成DOP

简要介绍了自制催化剂：Ｔｉ（ＯＭｅ）４／ＳｉＯ２－ＭｇＯ合成邻苯二甲酸酯（ＤＯＰ）增塑剂的概况，该增塑剂对提高ＰＶＣ电缆料的耐绝缘性有好处。     

新型增塑剂DPHP的应用性能评述

介绍了增塑剂DOP的替代产品邻苯二甲酸二(2-丙基庚)酯(DPHP)的物性、力学性能、加工性、电性能、耐候性等应用性能,并提出国内发展DPHP的建议。     

Theoretical analysis of polarization properties for tilted fiber Bragg gratings

The polarization properties for tilted fiber Bragg gratings (TFBGs) are investigated theoretically based on coupled-mode theory and Mueller matrix method. The expression of wavelength-related polarizationdependent loss (PDL) for TFBGs with different tilt angles is derived and calculated. Simulation results are compared, and the results indicate that the polarization capability of TFBGs with 45° angle is stronger than other TFBGs with smaller angles. The degree of polarization for unpolarized light passing T...     

光副载波复用系统中偏振模色散对偏振度的影响

在光副载波复用系统中若使用偏振度作为偏振模色散的监测信号将会遇到灵敏度低的问题.本文首先讨论了色度色散和初始啁啾对偏振度的影响,然后找出了影响监测信号灵敏度的因素,并提出了相应的解决方法.使用一个窄带滤波器用来平衡光载波和边带的功率,偏振度对偏振模色散的灵敏度将会明显的增长.     

Reducing the migration of additives from plasticised poly(vinyl chloride)

This paper reports work studying the partial substitution of the commonly used plasticiser di-octyl phtalate (DOP) by the permanent plasticisers ethylene-vinyl-acetate (EVA) and acrylonitrile-butadiene-styrene (ABS) in order to reduce migration of additives initially present in poly(vinyl chloride) (PVC) stabilised with epoxidised sunflower oil (ESO). Various formulations with and without the two different permanent plasticisers were prepared. Their tensile properties were compared. Migration tests with agitation at 40°C in two food simulants (olive oil and 15% aqueous ethanol) were carried out. The mass variation of the PVC samples with time was investigated. Migration phenomena were studied by using various analytical methods such as Fourier transform infrared spectroscopy (FTIR), atomic absorption spectrometry (AAS) and scanning electron microscopy (SEM). The results showed that additives migration can be considerably reduced by partial substitution of DOP with both permanent plasticisers used. The best results were obtained with the binary system of plasticisers based on DOP:ABS (30:10).     

伪卫星定位系统中组网布局研究

为达到伪卫星在任一时间、地点都能对目标进行精确可靠定位,对影响定位精度的关键技术—组网布局进行讨论。分析伪卫星及伪卫星定位系统的基本概念,探讨影响组网布局的3个因素：伪卫星定位系统的定位原理、伪卫星的＂视距＂范围和几何衰减因子。结果表明,几何精度因子GDOP与被观测伪卫星所构成的四面体体积成反比。     

卫星导航几何因子的分析和仿真

根据卫星导航几何因子GDOP在具体课题中的应用,从五个主要方面对其进行了研究,可知不同星座配置参数对不同纬度地区GDOP会产生影响;坐标转换时GDOP、PDOP和TDOP不变, HDOP、VDOP变化;GDOP随卫星数目增加单调递减,但递减幅度变小;卫星对GDOP贡献越大,其故障产生的定位误差越大;使用加权GDOP可有效的减小定位误差.     

PVC保鲜膜中增塑剂DOP在水中迁移规律研究

主要研究了不同几种MA条件下3种PVC保鲜膜中增塑剂DOP在蒸馏水中的迁移规律(模拟果蔬MA保鲜的环境),以PE保鲜膜对照。结果表明,3种PVC保鲜膜包装的蒸馏水中增塑剂DOP有不同程度的迁移,而在PE膜包装的水中没有检测到DOP的迁移。PVC保鲜膜DOP的迁移量与温度、时间、保鲜膜DOP的含量、保鲜膜的厚度有一定的相关性。     

核通风净化系统泄漏率检测试剂替代研究现状

概述了核通风净化系统中的高效过滤器和碘吸附器泄漏率检测所用DOP和R-11试剂的替代研究及应用状况,并对国内展开此方面研究提出了建议。     

Improving the transfer of near infrared prediction models by orthogonal methods

Eight calibration transfer methods based on the removal of orthogonal signal were compared for the standardization of whole soybean protein and oil models. Dynamic orthogonal projection (DOP), transfer by orthogonal projection (TOP), error removal by orthogonal subtraction (EROS), orthogonal signal correction (OSC), and orthogonal projections to latent structures (O-PLS) as well as the modification and extension of some of these methods were compared in the transfer of models in intra and inter-brand situations using two Foss Infratecs and two Bruins OmegAnalyzerGs. For each brand, a master was designated and its models transferred onto the second unit of its network and the two units of the second brand. Calibration models were transferable from brand to brand with similar or better precision than when each instrument was calibrated on its own calibration set (for Infratec 1229, the relative predictive determinant (RPD) increased in intra and inter-brand calibration transfer situations from 10.42 to 11.45 and 10.57, with DOP and EROS respectively). Performance of each method was different across parameters, instruments, and validation sets. DOP modifications on the determination of the difference matrix showed promising results while TOP and EROS extensions to include variability specifically present in certain crop years did not bring any beneficial effects.