Nanoscale Hybrid Langmuir－Blodgett Films Based on Cerium－Substituted Heteropolymolybdate and Polyquinoline

Nanoscale hybrid organic/inorganic Langmuir-Blodgett films of cerium-substituted heteropolymolybdates (CeHPMo) and π-conjugated macromolecule poly(1,2-dihydro-2,2,4-trimethyl) quinoline (PQ) were obtained with auxiliary film-forming material stearic acid(SA) or octadecylamine(ODA). The surface pressure-area isotherms illuminate the formation of the hybrid LB films of PQ/ODA/Ce-HPMo and PQ/SA/Ce-HPMo. The different film-forming mechanism was discussed when the different auxiliary film-forming materials were used in the system. The absorption spectra indicate that the molecules of PQ and Ce-HPMo are incorporated into the LB films. Tapping-mode AFM image reveals a granular surface texture of nanosized Ce-substituted heteropolymolybdate. STM image shows that the conductivity is greatly improved after Ce-substituted heteropolymolybdates are incorporated in the films.     

Triboluminescence of A New Europate Complex

A new europium (Ⅲ)complex Eu(HFNH)3Phen (HFNH: 4, 4, 5, 5, 6, 6, 6-heptafluoro-l-(2-naphthyl)hexane-1,3-dione ; phen : 1, 10-phenanthroline) was synthesized and its tribolumineseent phenomenon was observed. Photoluminescence and tfiboluminescence spectra were successfidly determined. The most intense tfiboluminescent emission originates from the transition of the central Eu^3 ion from ^5D0 level to ^7F2 level. The tribolunlinescent spectrum is basically similar to that of photoluminescence, which correlates with the disorders of F atoms.     

南海鸢乌贼营养成分分析与评价

采用现代生化分析法对南海鸢乌贼(Ryukyu squid)的营养成分进行分析与评价。结果表明:鸢乌贼胴体中水分、粗脂肪、粗蛋白和灰分分别为80.50%、0.49%、17.24%、1.37%。头足中水分、脂肪、蛋白和灰分分别为80.73%、0.87%、16.68%、2.88%,是一种高蛋白低脂肪水产品。鸢乌贼中氨基酸含量丰富,占鲜样总量的14.05%(胴体)、15.10%(头足),其中必需氨基酸(EAA)占氨基酸总量的40.89%(胴体)、40.11%(头足),鲜味氨基酸占45.89%(胴体)、46.51%(头足),必需氨基酸指数为79.56(胴体)、75.46(头足),其必需氨基酸的构成比例符合FAO/WHO标准。南海鸢乌贼中不饱和脂肪酸含量较高,占脂肪酸总量的49.90%(胴体)、54.55%(头足),其中EPA与DHA质量分数分别为6.9%(胴体)、5.67%(头足)和15.26%(胴体)、22.08%(头足),以上结果表明南海鸢乌贼有较高的营养价值和保健作用,具有较好的开发前景。     

一种用于骨折术后辅助康复训练监控系统的设计

针对骨折术后的病人在做康复训练时,医生无法监控病人训练等情况,介绍了一种用于骨折术后辅助康复训练监控系统。该系统以stm32单片机为核心,采用MPU6050传感器采集病人手臂屈伸的次数,通过ESP8266 wifi模块将数据传送到云服务器,通过HC06蓝牙模块发送到病人的手机app.医生可以通过手机app访问云服务器,查看病人训练情况和设置病人训练计划。作为骨折术后或久卧的病人(防止肌肉萎缩)康复训练的辅助产品,有一定的应用前景。     

天然气蒸汽转化制氢装置转化工序火灾爆炸原因分析

一、转化工序工艺概述 经过原料气压缩机增压的工艺天然气经过预热、脱硫，与经过过热中压蒸汽按H2O：C=3．5～4．0：1混合，进入对流段混合气预热器加热，经过上集气总管、猪尾管分别进入60根装有镍触媒的转化管中，天然气与水蒸气自上而下经镍触媒床层进行转化反应，最后经下集气管、下集气总管出转化炉。     

火炬自动点火控制系统实现瓦斯回收利用

介绍火炬自动点火控制系统的构成和工作过程;详述控制部分、信号采集部分、信号输出与执行部分的工作原理,实现火炬自动点火的过程.     

两种液位仪的比较与应用

主要介绍了ZYG-101型电子智能液位仪与Proservo NMS53…储罐液位仪的系统配置、工作原理、技术数据、仪表调校和仪表维护，并对二者的性能特点及使用情况进行了对比。     

Numerical study of fillet weld leg height of sleeve repair welding for in-service pipeline

This paper presents a mechanical calculation and numerical simulation of the fillet weld of sleeve repair.The mechanical analysis based on the yield criteria is performed to obtain the minimum value of the fillet weld leg height to ensure the strength and loadbearing capacity of the weld. Within the framework of numerical simulation,the parameters of double ellipsoid heat source are determined by fitting method and the simulated molten pool morphology agrees well with the practical weld. Finite element models with various weld leg height are performed to predict the distribution and magnitude of the deformation and stress. The simulation takes into account thermal,metallurgical and mechanical factors,and the maximum value of the fillet weld leg height is obtained based on the magnitude of the deformation and stress.The mechanical calculation and numerical simulation results show that 1.2-2 times wall thickness is an optimal range of fillet weld leg height. And reasonable parameters of sleeve repair for in-service welding are provided for engineering field,which can improve the service life of the weld and production efficiency.