行业网站建设之我见

根据自身工作经验及实践,并参考相关资料,提出了行业网站建设中应注意的几个方面的问题。     

超重力法脱除气体中硫化氢

采用超重力设备--旋转填料床替代传统湿法脱硫工艺中的脱硫塔,以PDS为脱硫催化剂,对工业过程中产生的含硫化氢气体进行了脱硫实验研究,考察了气液比、转速、碱废、温度、PDS含量等对脱硫率的影响规律.在适宜的条件下,获得了99.0%以上的脱硫率.与塔式脱硫技术相比,该技术具有脱硫效率高、液气比小、脱硫设备体积小等优点.     

被动直升机声信号波达方向估计

在分析直升机声信号和背景噪声特点的基础上,提出了1种适合于被动单直升机 目标声信号波达方向(DOA)估计的方法。首先在1帧时间内利用傅立叶变换估计直升机声信 号基频,然后用查表获得的投影矩阵滤除不需要的频率成分,最后用波束形成估计到达角。方 法运算量适中,精度较高,通过对采录的1架某型号直升机声信号的分析验证了该算法的有效 性。     

新技术在三元里立交工程中的应用

介绍广州三元里立交工程中溶岩地区桩基施工 ,狭长地带、重要交通干线上空大型构件安装及全球卫星定位系统等技术的应用     

贯流式发电机的不同设计方案对安装运行及检修的影响

文章探讨了灯泡贯流式发电机设计的一些问题，如发电机流道盖板基础框架的结构，发电机的冷却方式，发电机转子磁极的连结方式，发电机冷却风机的防碎措施及液压减载系统的高压油向正推力轴承供油等，这些内容不同的设计方案，对安装运行及检修有着重大的影响。     

地质数据分析的新方法

本文提出利用人工神经网络和神经网络专家系统的方法分析地质数据，从而更好地解决地质数据处理中的非线性问题。提高地质数据处理的精度及可靠性，为分析地质数据提供一种新的方法手段。     

云计算中的群体智能与不确定性知识表示

The lasting evolution of computing environment, software engineering and interaction methods leads to cloud computing. Cloud computing changes the configuration mode of resources on the Internet and all kinds of resources are virtualized and provided as services. Mass participation and online interaction with social annotations become usual in human daily life. People who own similar interests on the Internet may cluster naturally into scalable and boundless communities and collective intelligence will emerge. Human is taken as an intelligent computing factor, and uncertainty becomes a basic property in cloud computing. Virtualization, soft computing and granular computing will become essential features of cloud computing. Compared with the engineering technological problems of IaaS (Infrastructure as a service), PaaS (Platform as a Service) and SaaS (Software as a Service), collective intelligence and uncertain knowledge representation will be more important frontiers in cloud computing for researchers within the community of intelligence science.     

A novel method for the synthesis of polyamide 6 magnetic microspheres

Polyamide 6 (PA6) magnetic microspheres were firstly prepared via successively in situ polymerization using phase inversion technology of polymer pairs polyamide 6/polystyrene (PA6/PS) at extremely low PS content. The properties of PA6 magnetic microspheres, such as morphologies, diameter size distribution, magnetic properties, thermal stability, and the functional groups of the magnetic microspheres, were investigated by different techniques (i.e. SEM, TEM, DLS, VSM, FTIR, and DSC). The results indicated that the diameter distribution of PA6 magnetic microspheres was narrow, and the mean diameter size was about 7.7 μm. The saturation magnetization of magnetic microspheres reached 12.50 emu/g. Furthermore, the magnetic microspheres had abundant functional groups and better thermal stability.     

Non-isothermal crystallization of polyamide 6 matrix in all-polyamide composites: crystallization kinetic, melting behavior, and crystal morphology

The difference in the melting points of polyamide 66 (PA66) fiber and polyamide 6 (PA6) film permits the preparation of all-polyamide (all-PA) composites by film-packing. Good interface performance and integrated consolidation structure in this all-PA composite are contributed to the similar chemical composition between PA66 fiber and PA6 matrix. In this paper, the non-isothermal crystallization kinetics and melting behaviors of PA6 matrix in all-PA composite are studied by differential scanning calorimetry (DSC), in which the modified Avrami equation, Ozawa model, and Mo equation combining Avrami and Ozawa equation are employed. It is found that the Mo equation exhibits great advantages in treating the non-isothermal crystallization kinetics for both neat PA6 and PA6 matrix in all-PA composite. The crystal morphologies of single PA66 fiber–PA6 composite by polarizing microscope (POM) clearly show a transcrystallinity layer of PA6 around PA66 fiber that proves a remarkable nucleation effect of PA66 fiber surface on the crystallization of PA6 matrix.     

反相液相色谱法测定β-胡萝卜素

采用反相液相色谱法测定食品中的β—胡萝卜素含量，Nova-parkC18柱，纯甲纯为流动相，流速1．8ml/min，柱温40℃，波长450nm，外标法测定。方法平均回收率98．3，RSD=3．0％(n＝5)，线性范围1—42μg／m1。