莱赛尔LF集聚色纺纱线的生产实践

探讨莱赛尔LF 9.8 tex×2色纺毛衫用纱线的生产技术要点。阐述了生产过程中的配色和对色流程、纺纱工艺流程,确保色纺纱线的颜色符合要求。在原料准备、预处理、工艺参数配置和质量控制等方面采取了一系列技术措施,经过并纱和倍捻工序设定合理的股线捻度;最终成功生产出了莱赛尔LF 9.8 tex×2色纺纱线,达到了横机织造无斜片的质量要求。认为:生产中严格按照来样配色可保证最终成纱颜色满足用户要求。     

煤田采区三维地震资料精细解释方法及应用

三维地震勘探在煤田主要解决构造问题,因各地区地质情况的复杂程度不同,虽然已经过十多年的发展,但构造解释的准确度也有不同程度的差异。随着计算机技术发展和石油物探方法的引进,煤田采区三维地震勘探资料高信噪比、高分辨率为精细解释提供了可能。本文利用小波分析技术、方差体技术、图象处理等多种方法,结合已知采区的实例,对小断层做了精细构造解释,提高了三维地震资料构造解释的精度。     

Ni–Fe nanocubes embedded with Pt nanoparticles for hydrogen and oxygen evolution reactions

Electrochemical water-splitting is widely regarded as one of the essential strategies to produce hydrogen energy, while Metal-organic frameworks (MOFs) materials are used to prepare electrochemical catalysts because of its controllable morphology and low cost. Herein, a series of trimetallic porous Pt-inlaid Ni–Fe nanocubes (NCs) are developed with bifunctions of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). In the process of prepare the electrochemical catalysts, Pt nanoparticles are uniformly embedded in the Fe–Ni PBA cube structure, and ascorbic acid is employed as a reducing agent to reduce Pt²⁺ to Pt nanoparticles. In this work, the cubic structure of Fe–Ni PBA is maintained and the noble metal Pt nanoparticles are embedded. Remarkably, the formation of PBA cubes, Pt inlay and reduction are completed in one step, and Pt nanoparticles are embedded by a simple method for the first time. By employing acid etching method, a porous structure is formed on the PBA cube, which increases the exposed area of the catalyst and provides more active sites for HER and OER. Due to the porous structure, highly electrochemical active surface area and the embedded of highly dispersed Pt nanoparticles, the porous 0.6 Ni–Fe–Pt nanocubes (NCs) exhibits excellently electrocatalytic performance and durable stability to HER and OER. In this work, for HER and OER, the Tafel slopes are 81 and 65 mV dec⁻¹, the overpotential η at the current density of 10 mA cm⁻² are 463 and 333 mV, and the onset potential are 0.444 and 1.548 V, respectively. And after a 12-h i-t test and 1000 cycles of cyclic voltammetry (CV), it maintained high stability and durability. This work opens up a new preparation method for noble metal embedded MOF materials and provided a new idea for the preparation of carbon nanocomposites based on MOF.     

利用FA506型细纱机改造多功能快速纺纱小样机

探讨将FA506型细纱机改造成多功能快速纺纱小样机的方法和采取的主要技术措施。安装了JC-SF型竹节纱装置以纺制竹节纱;采用齿轮传动导丝辊的包芯纱纺纱装置,实现了包芯纱的纺制;采用四罗拉加集聚网格圈的集聚纺装置对细纱机进行改造,满足了加工集聚纱的要求;进行了粗纱架和喂入喇叭口的改造,实现了赛络纱的纺制;安装了专用纱管支架,实现了捻线功能。实践结果表明:应用改造后的纺纱小样机纺制OE汉麻/棉55/45 59tex×2股线、JC 18.5tex赛络集聚纱,成纱质量稳定,可满足打样要求。认为:改造后的纺纱小样机品种适应性强,品种翻改迅速,占地面积小,且降低了能耗,能够适应纺纱企业打样的要求。     

粘涤11.8tex AB双色纱的生产实践

探讨粘涤11.8tex AB双色集聚赛络纱的生产工艺。介绍了纺粘涤AB纱所配用5种原料的性能指标和纺纱工艺流程。通过对B组原料采取预混措施,A、B单独混棉纺成粗纱,对纺纱各工序优化配置工艺,制定相应的技术管理措施,成功纺制出粘涤11.8tex AB双色集聚赛络纱,满足了用户需求。认为:生产AB双色纱,配色和对色是基础,工艺和管理是关键,应认真实施有关工艺和技术管理措施。     

两种牦牛绒集聚纱性能的对比分析

探讨两种集聚纺装置纺制牦牛绒集聚纱和赛络集聚纱的成纱性能。分别采用网格圈式和空心罗拉式集聚纺装置纺制牦牛绒20.8tex集聚纱和16.7tex赛络集聚纱,并进行了性能对比测试。结果表明:纺制20.8tex牦牛绒集聚纱,两者毛羽水平相当,空心罗拉式集聚纺所纺纱强伸性能显著提高,条干均匀度略好;纺制16.7tex牦牛绒赛络集聚纱,空心罗拉式所纺纱强伸性显著提高,毛羽明显减少,条干均匀度显著改善。认为:实际生产中,可根据纺纱品种和质量要求,合理选择集聚纺装置和赛络纺工艺,能够纺制出性能较好,质量满足要求的牦牛绒纱。     

超大牵伸集聚纺莱赛尔纱的工艺研究

探讨超大牵伸集聚纺纺莱赛尔纱的工艺配置。通过TH558型超大牵伸细纱机和FA507B型细纱机分别纺制莱赛尔9.8tex和莱赛尔14.8tex集聚纱,并对比了成纱质量;同时纺制了莱赛尔7.4tex纱,对TH558型细纱机牵伸后区有无压力棒情况下的不同中区牵伸倍数做了对比试验。试验表明:四罗拉三区超大牵伸纺出纱的条干、强力、毛羽数、粗细节等指标较好,但棉结数有所增加;纺制莱赛尔7.4tex集聚纱时,牵伸后区加装压力棒后纺纱质量较好,中区牵伸应控制在1.15倍~1.60倍。认为:四罗拉三区超大牵伸形式对纺制特细号纱有较好的适应性;牵伸后区加装压力棒可以明显改善成纱质量。     

Feasibility evaluation of fermentative biomass-derived gas production from condensed molasses in a continuous two-stage system for commercialization

The excessive burning of fossil fuels is one of the main sources of emissions of carbon dioxide (CO₂) which causes the greenhouse effect. The effect could be resulted in climate changes and disorder of our ecosystem. Thus, bioenergy developments will play important roles to help decreasing CO₂ emission for better global environment in the future. In the domain of biohydrogen production, biomass including: cellulose, wastewater and agricultural waste are the main resources to maintain feedstock demand. Developing sustainable energy with sustainable feedstock sources like sugary wastewater by using two-stage biomass-derived gas production system might bring great economic profits to business. In this study, the system will be chosen to testify its sustainability when producing the sugary wastewater to renewable source energy. The commercial potential analysis is derived from the internal rate of return (IRR). The novelty finding of this study, as the result showed, found out that the energy recovery is 1.12 times higher than single stage. According to the IRR analysis with the calculated years of 15 years, the IRR is 32.47% that means the system can payback within 3.19 years. Therefore, the feasibility of commercialization potential of biomass-derived gas production system can be verified.     

基于混合神经网络深度学习的短期负荷预测

针对能源互联网环境下用电用户数据量大、多维度这一特点,提出了一种混合神经网络深度学习的短期电力负荷预测方法。首先,考虑常见的电力系统负荷的影响因素,建立多维数据库,并进行偏相关分析,排除其他变量干扰;其次,将LSTM、GRU两种神经网络作为前端神经网络对多维数据库中数据进行处理;最后,采用随机概率剔除与Adam训练优化函数改进的BP神经网络作为末端神经网络,建立负荷预测模型。通过算例仿真对本文方法与传统BP神经网络、LSTM神经网络、GRU神经网络进行了对比,验证了所提方法的有效性。     

茯苓丁真空脉动干燥特性及多目标优化

目的:探索真空脉动干燥过程中,干燥温度、真空时间、常压时间及其交互作用对茯苓丁干燥时间、单位能耗、多糖含量、破碎率的影响,以期得到较佳工艺参数,提高茯苓丁干燥效率和品质。方法:选取干燥温度（55~95 ℃）、真空时间（0~20 min）、常压时间（0~8 min）为自变量,设计中心复合响应面试验,分析影响规律;建立干燥时间、单位能耗、多糖含量、破碎率的二次回归模型;构建适应度函数,分别用遗传算法、隶属度法进行多目标优化,通过比较2种优化方法的结果,得到最佳工艺参数并进行实验验证。结果：干燥条件均可显著影响干燥时间、单位能耗、多糖含量、破碎率;建立的干燥时间、单位能耗、多糖含量、破碎率回归模型具有统计学意义（P＜0.001）,可用于对茯苓丁干燥评价指标的分析和预测;以适应度为评价指标,得出遗传算法的优化结果较优;遗传算法优化工艺为干燥温度80.88 ℃、真空时间7.68 min、常压时间5.04 min,该工艺条件下的干燥时间为443.3 min、单位能耗为4.43 kJ·h/kg、多糖含量为3.27 mg/g、破碎率为7.42%,节能增效作用显著（P＜0.05）。结论:真空时间和常压时间的合理配置可显著缩短干燥时间,并降低单位能耗和破碎率;茯苓丁内部温度随干燥室压力波动变化,适宜干燥温度可提高茯苓多糖含量;优化后的真空脉动干燥工艺,具有干燥时间短、品质好、破碎率低的优点。