浮法玻璃熔窑火焰空间石油焦部分替代重油燃烧的数值模拟

针对浮法玻璃熔窑火焰空间建立模型并进行了数值模拟，在保证热值相同的前提下，对比研究了重油燃烧及将石油焦部分替代重油燃烧时的流场分布特征。结果表明，石油焦部分代替重油燃烧后，两种燃料可很好地混合燃烧，窑炉内温度制度基本不受影响；石油焦着火时间比重油长，两种燃料混合燃烧时平均着火点滞后于仅使用重油时，且燃烧路径更长，燃烧时产生了大量CO，整个火焰空间及烟气出口处NOx的平均排放量与仅使用重油相比降低了30.02%，NOx减排效果明显。     

非高斯噪声激励下非线性漂移Fokker-Planck方程的非稳态解及其应用

非高斯噪声广泛存在于各种非线性系统，对非高斯噪声所驱动系统的非稳态演化行为进行研究可以更为深入的了解其内在的演化机理．本文对非高斯噪声和高斯白噪声共同驱动的非线性动力学系统的非稳态演化问题进行研究．首先应用格林函数的 $\Omega$ 展开理论在初始区域对非线性动力学系统进行线性化，然后结合本征值和本征矢理论推导出了该系统 Fokker-Planck 方程的近似非稳态解的表达式，最后以 Logistic 系统模型为例分析了非高斯噪声强度，关联时间及非高斯噪声偏离参数对非稳态解以及一阶矩的影响．研究结果表明，用 Logistic 模型描述产品产量增长时，其非稳态解可更好地反映产品产量在不稳定点附近的演化行为．     

一株耐铜真菌HLKF-11的初步鉴定及铜富集能力测定

从大冶铜绿山铜铁矿废弃露采场铜含量极高的土壤中分离获得1株耐铜真菌菌株HLKF-11。经初步鉴定,该菌株为尖孢镰刀菌(Fusarium oxysporum),其最适培养条件为:蔗糖为碳源,硝酸铵为氮源,pH值6.50,温度28℃。菌株HLKF-11在培养液Cu~(2+)初始浓度为500 mg·L~(-1)时,Cu~(2+)富集量达到41.69 mg·g~(-1),表现出较强的Cu~(2+)耐受和富集能力。对进一步丰富耐铜微生物资源以及应用于铜污染土壤的生物修复具有一定的理论和实践意义。     

酸性服役管线管BNS力学及耐腐蚀性能研究

文章介绍了包钢钢管公司酸性服役管线管BNS成分设计要求,对材料的拉伸性能、冲击性能、组织以及耐腐蚀性能进行了检测和分析,正火处理后,材料具有良好的力学性能和抗腐蚀性能.试验结果表明,设计的BNS完全能满足酸性服役条件下管线管性能要求.     

常温大胀形率车桥管的开发

针对国内某车桥制造企业采用无缝钢管生产大胀形率车桥时出现的胀形区域开裂问题,设计开发了适用于大胀形率车桥用钢,并进行了无缝钢管产品试制和使用评价.结果表明,采用设计开发钢种生产的车桥用无缝钢管,延伸率为28％～31％,-60℃的纵向冲击功达到80 J,产品具有良好的塑性和低温冲击韧性.经用户批量使用,采用设计钢种生产的无缝钢管在大胀形时未发生开裂现象.     

Phytohormonal and metabolism analysis of <i>Brassica rapa</i> L. ssp. <i>pekinensis</i> with different resistance during <i>Plasmodiophora brassicae</i> infection

Clubroot of Chinese cabbage (Brassica rapa L. ssp. pekinensis), caused by the obligate parasite Plasmodiophora brassicae, accounts for serious yield losses. The aim of our study was to explore the phytohormone levels and metabolome changes in the roots of resistant and susceptible B. rapa genotypes at a late stage of infection, i.e., 28 days post-infection. Both genotypes showed decreased auxin levels after P. brassicae infection except for indole-3-acetic acid. Overall, the susceptible genotype had higher auxin and cytokinin levels after infection, with the exception of trans-zeatin and 3- indolebutyric acid as compared to the resistant genotype. Jasmonic acid levels declined after infection regardless of the genotype. Resistance against clubroot was evident with the increased levels of salicylic acid in the resistant genotype. The susceptible genotype had a higher number of differentially accumulated metabolites (DAMs) (262) than the resistant genotype (238) after infection. Interestingly, 132 DAMs were commonly detected in both genotypes when infected with the pathogen, belonging to metabolite classes such as phenolic acids, amino acids, and derivatives, glucosinolates, organic acids, flavonoids, nucleotides and derivatives, and fatty acids. The differential metabolite analysis revealed that metabolites related to amino acid biosynthesis, fatty acid biosynthesis and elongation, glutathione metabolism, and glucosinolate metabolism were highly accumulated in the resistant genotype, suggesting their essential roles in resistance against P. brassicae infection.     

区块链技术在电力领域应用场景的探索分析

区块链作为一种新兴技术,被认为是继蒸汽机、电力、互联网之后的下一代颠覆性的核心技术,正在逐步改变金融、身份认证、防伪等传统技术领域。电力行业是支撑国民经济和社会发展的基础能源产业,文章基于区块链关键技术,探讨区块链技术在电力领域的应用前景。首先分析了区块链原理以及在相关行业的应用场景,然后对区块链在电力行业应用情况和应用场景进行研究分析,最后对区块链未来的应用前景与发展趋势进行探索展望,以期引领区块链技术在能源互联网领域的典型应用。     

压水堆核电厂堆外源量程探测器计数率分析

压水堆核电厂启动过程中，次级中子源为堆外源量程探测器提供本底计数率，避免测量盲区，确保反应堆安全启动。但次级中子源的引入会为核电厂带来较大的经济和环境负担，同时也需承受次级中子源破损等带来的风险。为此，可使用受辐照燃料组件的自发裂变中子源进行替代，即无源启动方式。通过研究堆外源量程探测器计数率的理论计算方法，并基于运行电厂测量数据进行分析验证，为源量程探测器计数率的理论预估提供了较为完善的理论方法流程。本文结果可为无源启动源量程探测器计数率分析提供支持，同时也可用于次级中子源装载量或布置位置的优化分析等。     

Experimental study on the permeability and self-healing capacity of geosynthetic clay liners in heavy metal solutions

Geosynthetic clay liners (GCLs), which have a very low permeability to water and a considerably high self-healing capacity, are widely used in liner systems of landfills. In this study, a series of experimental tests were carried out under complex conditions on typical commercial GCLs from China. In particular, the effects of pH values and lead ions (Pb²⁺) were tested in addition to other factors. The swelling properties of natural bentonite encapsulated between geotextile components in the GCLs were tested first. The swelling capacity was reduced rapidly at pH values < 3 and concentrations of Pb²⁺ >40 mM. Permeability tests on GCLs with different concentrations of lead ions were then performed by using the self-developed multi-link flexible wall permeameter, and data showed that increases in lead ion concentrations greatly improved the permeability. Finally, self-healing capacity tests were conducted on needle-punched GCLs under different levels of damage. Results showed that the GCLs have a good self-healing capacity with small diameter damage holes (2 mm, close to three times the original aperture), but with a damage aperture larger than 15% of the sample area, the self-healing capacity could not prevent leakage; hence, in certain situations it will be necessary to repair the damage to meet the anti-seepage requirement.