医院船改装固定压载系统的设计及施工概述

文章以医院船改装为研究背景,通过对改装过程中固定压载系统的组成、设计、施工的概述,介绍固定压载系统的应用场景、材料选择、施工方案、数据整理。尤其在针对复杂结构舱室的固定压载系统设计时,灵活运用现有材料匹配密度,研究切实有效的施工方案,制定固体压载物装填指导工艺,完成对固定压载系统的详细设计。     

推移质间相互作用力研究

沉降性浆体中固体颗粒处于滑跳移运动状态时,固体颗粒将受到摩擦力的影响。推移质的整体摩擦力等于推移质间剪切力和推移质与管壁间摩擦力的和。任意推移质的剪切力与固体颗粒的体积分数成比例,由力的平衡方程可以推导出其比例系数。     

钢铁渗硫技术的发展及应用

详细阐述了钢铁表面渗硫机理,描述了渗硫层结构与性能,总结了几种典型渗硫工艺以及渗硫技术的主要发展与应用。     

商用车用溶剂型免中涂金属漆的涂层性能

简要介绍了一汽商用车涂装线先后采用的No.1第1代溶剂型免中涂金属漆、No.2第2代溶剂型高固体分免中涂金属漆的开发过程和应用情况;选择3种商用车用典型板材对采用传统工艺和溶剂型免中涂工艺的涂层性能(包括外观、机械性能、耐候性能和耐循环腐蚀组合试验性能等)进行了对比。结果表明,两代产品均能满足使用要求;相比之下,第2代产品的性能更加优异。     

MARPOL附则V修正案实施中存在的问题及对策

一、背景2011年7月召开的MEPC第62次会议上以MEPC.201(62)决议的形式通过了MARPOL附则V修正案,按默认接收程序已于2012年7月1日视为接受,2013年1月1日开始生效。新的MARPOL附则V扩大了船舶垃圾的定义,和以往规定相比增加了"动物的尸体"、"食用油"等,并将固体散装货物残余物和货舱的洗舱水包括在内;对垃圾排放的规定,除了按第3、4、5和6条明确规定有限的允许排放以及第7条的例外,所有的船舶垃圾禁止排放入海(见表1)。     

易流态化固体散货研讨会在舟山召开

日前,由中国理货协会举办的易流态化固体散装货物取样监装服务收费标准研讨会在浙江舟山召开,会议提出了"明确目的、统一认识、确定方法、准确测算"的要求。研讨会达成四个方面共识:规范取样、制样、送检、监装等收费流程,将其与装船货物重量脱钩,根据合理成本原则,确定收费标准;货物取样监装直接关系到国家经济和人身安全,国家必须对此项业务实行非市场化特殊管理;科学     

Fabrication and Interfacial Structure of Ni-YSZ-LSM Porous Scaffold for Solid Oxide Fuel Cells

A novel process route using tape casting and stacking for fabricating porous scaffold of solid oxide fuel cells (SOFC) was demonstrated. The linear shrinkages of anode (Ni-YSZ, YSZ stands for 3% Y_2O_3(mole fraction) stabilized ZrO_2) and cathode (LSM-YSZ, LSM stands for La_(0.8)Sr_(0.2)Mn0_3) were optimized to be uniform with that of electrolyte during sintering, by controlling the content of pore former. The micromorphology and interface microstructure of the cross-section of the porous scaffold were observed by optical microscope and scanning electron microscope, respectively. The element distribution and phase composition were analyzed by energy dispersive spectrometer and X-ray diffraction, respectively. The results showed that the porous scaffold with regular pore shape and high specific surface area was obtained after sintering at 1 350℃. The fabricated porous scaffold had defect free interfacial structures due to the uniform shrinkage of anode, cathode and electrolyte layers. In addition, it was shown that diffusions of Zr, Ni and La caused a progressive boundary between YSZ, Ni-YSZ and LSM-YSZ layers. The interface between anode and electrolyte (Ni-YSZ/YSZ) was mainly composed of Ni, YSZ and a small amount of NiO, and the interface between cathode and electrolyte (LSM-YSZ/YSZ) was mainly composed of YSZ, LSM and a small amount of La_2Zr_2O_7.     

高压旋喷桩施工技术

高压旋喷注浆具有加固体强度高、加固质量均匀、加固体形状可控的特点,目前已成为国内外工程界普遍接受的、多用、高效的地基处理方法。由于具有上述诸多优点,丹拉高速东小路立交桥桥头引道的施工采用了高压旋喷法进行地基处理来减小桥头跳车。     

Screening of the effective cellulose-degradable strain and its application in the production of cellulose bioethanol

Strains from the cellulose-containing environment were collected. Primary screening(by filter-paper Hutchison solid culture medium and sodium carboxymethylcellulose solid culture medium) and reelection(by filter-paper inorganic salt culture medium and sodium carboxymethylcellulosc Congo red coltnre medium) indicated that five strains obtained were best suited for high performance cellulose degradation. Determination of sodium carboxymethylcellulose activity(CMCA) and filter paper activity(FPA) was accomplished for each of the five. The strongest of the five in CMCA and FPA was applied to the production of cellulose bioethanol by separate hydrolysis and fermentation(SHF) and simultaneous saccharification and fermentation(SSF) respectively.     

固体超强酸SO_4~(2-)/ZrO_2-TiO_2-Fe_2O_3催化合成乙酸异戊酯

用沉淀浸渍法制备固体超强酸SO42-/ZrO2-TiO2-Fe2O3催化剂,利用TG和XRD进行表征.将该催化剂用于醇酸反应制备乙酸异戊酯,考察了反应条件对酯化率的影响.结果表明,当Zr、Ti和Fe的摩尔比为1∶3∶2时,催化剂活性最高.其催化合成乙酸异戊酯的适宜工艺条件为:醇酸摩尔比1.3∶1,催化剂用量(以0.25 mol乙酸计)1.0 g,带水剂用量10 mL,反应时间3 h.在此条件下,酯化率达98.5%.