尿素合成塔衬里的腐蚀及修复

阐述了尿素合成塔材里腐蚀机理及对腐蚀衬里进行局部更换过程,提出了塔衬防腐措施。     

强有机溶剂型清防蜡剂SG-3

Ｓ Ｇ３ 是针对辽河曙光油田曙三区开发的性能优良的强有机溶剂型清防蜡剂。本文介绍了 Ｓ Ｇ３ 的配方组分,探讨了清防蜡作用机理及影响清防蜡效果的因素,报道了在辽河曙光油田２２ 口井现场应用的效果。     

二次非球面光学零件的轨迹成形法加工新技术

主要论述轨迹成形法加工非球面光学零件新原理的基本思想、成形原理、机床的基本结构以及与数控加工比效率高成本低的优点。     

高速公路常用互通式立体交叉型式及交通特性

根据高速公路与其相交的道路等级不同,互通式立体交叉可分为两大类:高速公路之间的互通式立体交叉和高速公路与一般公路之间的互通式立体交叉,本文分别对这两种立体交叉类型的常用型式及交通特性加以阐述。     

基于近红外光谱的大豆油质量快速检测技术应用研究

利用近红外光谱快速检测大豆油脂的过氧化值和酸值,分析发现大豆油脂的过氧化值和酸值在近红外光谱区域有特征吸收峰,通过对比分析,优选出大豆油脂过氧化值特征波段为4500~9000 cm^-1,大豆油脂酸值的特征波段为4500~5000 cm^-1,采用小波变换对光谱去噪并利用PLS建立了预测模型,大豆油脂过氧化值和酸值模型的相对标准偏差RSD分别为3.513%和3.629%,准确度与化学方法相近,说明利用近红外光谱分析技术快速检测大豆油脂主要指标是可行的。     

考虑源网荷储协调的主动配电网优化调度方法研究

针对源网荷储的一体化运行目标,提出一种考虑源网荷储的主动配电网协调运行调度方法.基于多时间尺度的思想,以最小化可调节量和最大程度地增加新能源消纳为目标,建立一个具有两个互补时间尺度的主动配电网日前-日内优化调度模型,将差分进化算法和帝国竞争算法相结合求解最优调度模型.仿真验证了所提出的多源协同调度方法的优越性.仿真结果...     

Photocatalytic hydrogen production from seawater under full solar spectrum without sacrificial reagents using TiO2 nanoparticles

Photocatalytic water splitting(PWS)has attracted widespread attention as a sustainable method for converting solar to green hydrogen energy.So far PWS research ...     

回火工艺对1Cr17Ni2不锈钢锻后回火硬度的影响

采用正交试验等研究了回火温度、回火时间、回火次数及冷却方式对1Cr17Ni2不锈钢锻后回火硬度的影响。结果表明,本试验中在回火温度630~730 ℃,回火时间120~360 min,回火1~3次以及冷却方式分别为空冷、堆冷、砂冷的条件下,对1Cr17Ni2钢锻后回火硬度影响因素的主次排序为:回火次数＞回火温度＞回火时间＞冷却方式,其中随着回火次数增加,硬度逐步下降,其余参数在试验参数范围内与硬度无明显正相关关系。在保温时间为240 min时,将回火温度升高至720 ℃,或在680 ℃下,将保温时间延长至720 min,进行一次回火,回火后空冷,硬度均高于3.5 HBS。在加热温度为680 ℃、回火时间为180~210 min,回火后空冷,回火3次可将硬度降低至3.6 HBS以下。     

Nanofiber-based transparent film with controllable optical transparency adjustment function for versatile bionic applications

As a new favorite in the field of smart materials,smart windows,with visual stimulus sensing functions,have attracted extensive attention for their high transparency,sensitive response to environmental stimulus,and reversible changes in light transmittance.In this paper,the PVA-coPE nanofiber film,which was completely opaque like paper,was used as filling phase and reacted with water-soluble N-vinyl-2-pyrrolidone(NVP)by photopolymerization to produce a flexible transparency polyvinyl pyrrolidone/spraying PVA-co-PE nanofiber films(PVP/SPNFs)composite film.Among them,the small size effect of PVA-coPE nanofibers played a pivotal role in improving the film's transparency.Nevertheless,the PVP's reversible adsorption-desorption behavior of water molecules made its refractive index change dynamically and reversibly,which led to the visual transition of composite film from transparent to opaque just like that of electronic smart windows.Additionally,the reversible transition rate of film's transparency can be effectively regulated by the nanofiber stack structure.This new design of transparency visualization transforms composite film in response to humidity,innovates the electrically controlled smart windows on energy and realizes the effective utilization of natural resources such as water and humidity,which has a great application prospect in the field of flexible optoelectronic devices,intelligent buildings,and smart writing.