溅渣护炉技术在临钢20t转炉上的应用

介绍了转炉溅渣护炉技术在临钢20t转炉上应用的基本情况，对应用中出现的主要技术问题提出了解决措施。     

一种轮组结构的爬楼梯轮椅的设计

针对普通轮椅不具有爬楼梯的功能,设计了一种轮组结构的爬楼梯轮椅。该爬楼梯轮椅结构紧凑,操作方便,工作可靠,采用轮组结构的演变实现爬楼梯功能,利用滚轴滑轨机构进行座椅调平,并对其越障、跨沟和爬楼梯的运动过程进行了分析。结构表明该轮椅有较强的越障能力和路面适应性。     

Parameter Recovery Studies With a Diagnostic Bayesian Network Model

This paper describes a Bayesian network model for a candidate assessment design that had four proficiency variables and 48 tasks with 3–12 observable outcome variables per task and scale anchors to identify the location of the subscales. The domain experts’ view of the relationship among proficiencies and tasks established a complex prior distribution over 585 parameters. Markov Chain Monte Carlo (MCMC) estimation recovered the parameters of data simulated from the expert model. The sample size and the strength of the prior had only a modest effect on parameter recovery, but did affect the standard error of estimated parameters. Finally, an identifiability issue involving relabeling of proficiency states and permutations of the matrixes is addressed in the context of this study.

     

VBA在试卷分析中的应用

在试卷分析过程中，传统的成绩统计采用手工的办法，费时费力。针对此问题提出用VBA编程的方法，实现计算机对数据的自动化处理，提高了工作效率和准确性。     

纳米零价铁对厌氧消化影响的反应动力学模型

污泥厌氧消化是污水处理厂实现“碳中和”的关键环节。然而传统厌氧消化技术普遍存在水解不充分、产甲烷效率低的问题,在工程中表现为污泥的甲烷潜势（B₀）低、产甲烷速率（k）低等,从而使得获得的甲烷气通常不能达到量和质的要求。纳米级零价铁（NZVI）基于能够在厌氧条件下析氢（H₂）腐蚀为产甲烷菌提供电子供体及更有利的厌氧环境,而被认为在厌氧消化领域具有潜在的应用前景。就此,通过在厌氧消化体系中投加不同剂量的NZVI（0、100、300、600和1000 mg·L^-1）,以甲烷潜势（B₀）和产甲烷速率（k）为主要评价指标,并基于一级反应动力学模型探讨了NZVI对厌氧消化过程的主要作用机理。研究结果表明,NZVI能够强化厌氧消化过程产甲烷,主要作用机制在于促进微生物细胞破壁,从而提高污泥的水解酸化程度,得到更高的甲烷潜势（B₀）。     

聚乙烯醇-壳聚糖复合海绵的制备及性能

为了进一步提高聚乙烯醇-壳聚糖复合海绵的性能,在聚乙烯醇与甲醛的缩醛化反应过程中加入壳聚糖,并使其与其他原料反应制备聚乙烯醇-壳聚糖复合海绵. 分别改变配方中发泡剂和壳聚糖的含量,合成了一系列组分不同的聚乙烯醇-壳聚糖复合海绵,研究了发泡剂含量和壳聚糖含量对复合海绵结构、吸水能力和膨胀率的影响,并采用扫描电子显微镜对复合海绵的结构与微观形貌进行表征,测试了改性海绵对大肠杆菌和金黄色葡萄球菌的免疫能力. 研究结果表明,选用曲拉通X-405作为发泡剂,当壳聚糖含量为聚乙烯醇质量的10%时,所制备的复合海绵效果最佳,复合海绵具有明显的蜂窝状多孔结构,其吸水率可达到858%. 抗菌实验证明,与纯的聚乙烯醇海绵相比,复合海绵对金黄色葡萄球菌具有较好的免疫能力.     

转炉喷溅浅析及措施

分析了临钢炼钢厂20t转炉冶炼过程产生喷溅的原因,根据实际提出了应采取的控制措施,通过生产实践取得了较好的效果。     

Highly Stretchable,Fast Self‐Healing,Responsive Conductive Hydrogels for Supercapacitor Electrode and Motion Sensor

Conductive hydrogels as potential soft materials have attracted tremendous attention in wearable electronic devices. Nonetheless, manufacturing intelligent materials that integrate mouldability, stretchability, responsive ability, fast self‐healing ability, as well as mechanical and electrochemical properties is still a challenge. Here, multifunctional conductive hydrogels composed of poly(vinyl alcohol) (PVA) and polypyrrole (PPy) nanotube are prepared using borax as cross‐linker. The existence of multicomplexation, entangled PVA chains, and interconnected PPy nanotubes, as well as extensive hydrogen bonding results in the fabrication of hierarchical network of PVA‐PPy hydrogels. PVA‐PPy hydrogels exhibit high stretchability (more than 1000%), multiresponsiveness, low density (0.95 g cm^?3), high water content (96%), and 15 s self‐healing features. Furthermore, the self‐healing supercapacitor electrode and motion sensor based on PVA‐PPy hydrogels demonstrate ideal performances. This facile strategy in this work would be promising to construct an excellent multifunctional soft material for various flexible electrode and biosensor.     

贮藏条件对发芽大麦茶风味物质变化的影响

采用感官评定方法和气相色谱-质谱技术,研究发芽大麦茶在不同贮藏温度（室温25 ℃、冷藏4 ℃、冻藏－20 ℃）和贮藏时间（3、6、9 个月）条件下,主要风味物质的变化。结果表明：冷藏3 个月发芽大麦茶的感官比其他贮藏条件较优,而且低温冷藏有利于形成和有效保留发芽大麦茶的香气成分;而发芽大麦茶在室温和冻藏条件下的特征风味物质含量一直在降低,贮藏后期（6～9 个月）酸、醇、萘类物质增加,有不愉快的味道。发芽大麦茶适宜的贮藏条件为冷藏（4 ℃）短期贮藏（0～3 个月）。     

20g品种钢工艺开发与研究

介绍了锅炉钢２０ｇ钢种转炉、连铸生产工艺及产品开发情况,试验表明其工艺是可行的。