数字化加热炉在石钢的应用

介绍了数字化加热炉的特点及优点,并和传统比例加热炉作了比较.     

CSP薄板坯连铸包晶反应区域的研究

研究了冷却速率和硅、锰合金元素含量对Fe-C合金的包晶反应和包晶点位置的影响;由于CSP薄板坯冷却速率快,Fe-C相图向左下方移动,包晶反应区域的碳含量为0.08%～0.20%;在钢中其它成分不变的条件下,硅含量增加,锰含量减少,包晶点处的碳含量会提高.     

建设资源节约和环境友好型钢铁企业的分析

分析了中国钢铁工业的资源、能源、环保现状和主要存在的问题,提出了建设资源节约和环境友好型钢铁企业的主要思路.     

A Holistic Approach to Determining Stereochemistry of Potential Pharmaceuticals by Circular Dichroism with β-Lactams as Test Cases

This paper’s main objective is to show that many different factors must be considered when solving stereochemical problems to avoid misleading conclusions and obtain conclusive results from the analysis of spectroscopic properties. Particularly in determining the absolute configuration, the use of chiroptical methods is crucial, especially when other techniques, including X-ray crystallography, fail, are not applicable, or give inconclusive results. Based on various β-lactam derivatives as models, we show how to reliably determine their absolute configuration (AC) and preferred conformation from circular dichroism (CD) spectra. Comprehensive CD analysis, employing both approaches, i.e., traditional with their sector and helicity rules, and state-of-the-art supported by quantum chemistry (QC) calculations along with solvation models for both electronic (ECD) and vibrational (VCD) circular dichroism ranges, allows confident defining stereochemistry of the β-lactams studied. Based on an in-depth analysis of the results, we have shown that choosing a proper chiroptical method/s strictly depends on the specific case and certain structural features.     

Optimal strategies to protect a sub-population at risk due to an established epidemic

Epidemics can particularly threaten certain sub-populations. For example, for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the elderly are often preferentially protected. For diseases of plants and animals, certain sub-populations can drive mitigation because they are intrinsically more valuable for ecological, economic, socio-cultural or political reasons. Here, we use optimal control theory to identify strategies to optimally protect a ‘high-value’ sub-population when there is a limited budget and epidemiological uncertainty. We use protection of the Redwood National Park in California in the face of the large ongoing state-wide epidemic of sudden oak death (caused by Phytophthora ramorum) as a case study. We concentrate on whether control should be focused entirely within the National Park itself, or whether treatment of the growing epidemic in the surrounding ‘buffer region’ can instead be more profitable. We find that, depending on rates of infection and the size of the ongoing epidemic, focusing control on the high-value region is often optimal. However, priority should sometimes switch from the buffer region to the high-value region only as the local outbreak grows. We characterize how the timing of any switch depends on epidemiological and logistic parameters, and test robustness to systematic misspecification of these factors due to imperfect prior knowledge.     

可在线编程的针织圆机控制器设计

介绍了一种基于P89C668HFA单片机的可在线编程的圆机控制器,给出了该控制器的硬件原理框图和ISP的具体实现方法.实例表明,应用该控制器可以方便的实现用户自定义信息的更新和软件的远程升级.     

三峡库区地质灾害治理工程概(预)算细节问题研究

三峡库区峡谷深切,地势险峻,地质灾害治理工程十分复杂,实践中,工程实际结算成本往往比概(预)算成本要高。在总结三峡库区二期地质灾害勘查治理实际经验的基础上,对工程概(预)算中的若干细节问题进行了研究,以期尽量避免概(预)算中的缺、漏项,缩小工程结算成本与概(预)算成本之间的差距。     

用竹子制浆备料废弃物生产竹塑复合材料

利用竹子制浆备料废弃物竹屑与高密度聚乙烯(HDPE)生产竹塑复合材料,竹屑、塑料、助剂的质量分数分别为70％、25％、5％.通过测试,竹塑复合材料的线膨胀率和线收缩率大小的变化规律均为厚度方向＞宽度方向＞长度方向,产品其他指标均能满足用户在室内外的装饰、装修使用要求,可实现竹材加工企业对废弃物竹屑变废为宝、发展循环经济的目标.     

Analysis on Availability of the Carbon Element in Alcohol Production

According to the concept of circular economy, the mass integration of alcohol production was investigated though the analysis of the carbon element contained in raw material cassava. Through the mass integration, the distillage wastewater turned into carbon resource and produced a great deal of by-product biogas while its chemical oxygen demand (COD) was reduced from 50000 mg/L to not more than 300 mg/L, the local secondary effluent standards, and other by-products such as CO2 (liquidized) and fusel oil were recovered. In the way, the consumption of raw material was only 2.2 tons cassava to produce 1 ton alcohol (96%, j) in the case study, much lower than the average level 2.92 t/t in China. The carbon element balance for production of alcohol was made through testing the concentrations of the carbon element of all mass flows. The results showed that the mass integration helped the availability of the carbon element increased from 44.74% to 64.75%.     

滚球半径法确定瓦斯抽放泵站放空管合理安置区域

为了确定瓦斯抽放泵站放空管合理安置区域。在滚球半径法推算原理的基础上,利用几何知识,使用AutoCAD绘图软件绘制瓦斯抽放泵站放空管合理安置区域,而非传统方法的若干公式计算。AutoCAD绘图软件作图的方法避免了《GB 50057-2010建筑物防雷设计规范》附录D中传统方法繁琐的计算。确定瓦斯抽放泵站放空管合理安置区域作图法直观、简单、清晰、明了,简化了瓦斯抽放泵站防雷设计工作。为科学合理确定瓦斯抽放泵站放空管位置提供了依据。