分点进水高效除磷脱氮工艺理论及其应用

在分点进水高效除磷脱氮工艺(ECOSUNIDE)中,以统一动力学为理论基础,对动力学方程进行了分析,并对分点进水高效除磷脱氮工艺进行了工程性试验.研究表明,分点进水高效除磷脱氮系统比另一组未改造的A2/O系统可多处理水量4 500 m3/d,具有明显的水量优势。在低温、低碳源条件下,分点进水高效除磷脱氮系统出水BOD,COD和氨氮质量浓度分别稳定在6,25和1.9 mg/L左右,满足国家城镇污水处理厂污染物排放标准(GB 18918—2002)一级A出水标准,其他指标稳定达到一级B出水标准。通过对分点进水高效除磷脱氮与A2/O系统内的活性污泥进行镜检分析比较,发现分点进水高效除磷脱氮系统内的活性污泥性状较好,生物相更丰富,污泥菌胶团颜色较深,较紧密,絮体边缘较清晰,丝状菌明显.     

中国城市地貌试点研究概述

简要介绍了国内外城市地貌学研究的发展概况.重点阐述了国内城市地貌试点研究的主要内容:①中国城市分布与地貌格局的关系;②地貌环境对城市建设和发展的影响;③城市地质环境对城市建设的影响;④城市地貌与城市灾害;⑤城市人为作用及人工地貌体;⑥水体对城市发展的影响; ⑦城市地貌研究的理论与方法.     

Cloning and expression of DnaJ homolog in carrot somatic embryo

As the co-chaperone of DnaK/Hsp70 protein, DnaJ/Hsp40 protein influences the synthesis and assembly of the protein complex by regulating ATPase activity of DnaK/Hsp70 protein. By employing the modified method of cDNA representational difference analysis, a homologous fragment of DnaJ was isolated from the deregulated carrot somatic embryos, and it was further used as the probe to screen the cDNA library of carrot somatic embryo deregulated for 12 h. As the result, DcJ1 gene, the homologous gene of DnaJ, was isolated from carrot. Sequence analysis showed that its coding region is 1257 bp, which codes 418 amino acids and comprises 3 highly-conserved characteristic domains. Southern blot analysis suggested that the DcJ1 gene seems to be a single copy in the genome, while Northern blot result indicated that DcJ1 expresses only in roots and its degree of expression changes obviously with the regulation-deregulation process. These results suggest that DcJ1 is correlated with the early development of carrot somatic embryo radicle.     

人工神经网络学习的代数方法

介绍了具有自环和无自环的神经网络利用 Ｍｏｏｒｓ－Ｐｅｎｒｏｓｅ伪逆的学习方法，分析 了这种方法获得的权重所具有的优点，如权重方均根值最小等．使得网络具有较好与较 均匀的鲁捧性。找到了具有自环和无自环网络在权重方均根最小条件下权重之间的关 系，从而使无自环网络的学习过程与有自环的网络同样简单。通过伪逆方法找到了确定 阈值的优化办法，使网络鲁棒性有不同程度的提高。     

学校地理图象的学习心理研究

通过对学校地理图象的图形特征的分析,着重研究了学校地理图象的学习心理过程.     

连续采煤机房柱式采煤法工作面生产能力的确定

本文把连续采煤机生产过程看成是生产和故障交替出现的更新过程,采用可靠性理论,提供了房柱式采煤法工作面生产能力的计算公式,方法简便,可为矿井和采区设计提供依椐。     

Ferrites boosting photocatalytic hydrogen evolution over graphitic carbon nitride: a case study of (Co,Ni)Fe2O4 modification

The charge carrier separation and surface catalytic redox reactions are of primary importance as elementary steps in photocatalytic hydrogen evolution. In this study, both of these two processes in photocatalytic hydrogen evolution over graphitic carbon nitride（g-C₃N₄） were greatly promoted with the earth-abundant ferrites（Co,Ni）Fe₂O₄modification. Co Fe₂O₄ was further demonstrated to be a better modifier for g-C₃N₄ as compared to Ni Fe₂O₄,due to the more efficient charge carrier transfer as well as superior surface oxidative catalytic activity. When together loading Co Fe₂O₄ and reductive hydrogen production electrocatalyst Pt onto g-C₃N₄, the obtained Pt/g-C₃N₄/Co Fe₂O₄ photocatalyst achieved visible-light（λ>420 nm） hydrogen production rate 3.5 times as high as Pt/g-C₃N₄, with the apparent quantum yield reaching 3.35 % at 420 nm.     

水热合成铈掺杂型锰氧化物的结构及其影响因素分析

以KMnO4、Ce(NO3)3·6H2O和醋酸为原料、聚乙烯吡咯烷酮(PVP)为分散剂,采用水热法一步合成了Ce掺杂型锰氧化物,结合XRD、EDS及BET等手段,对制得产物的晶形、物相组成及比表面积等进行表征。结果表明,在n(KMnO4)=0.01mol、n(Ce)/n(Mn)=0.1、n(PVP)=0.01mol、水热时间为12h、水热温度分别为110℃和190℃时,分别可控合成Ce掺杂Cryptomelane型和Ce掺杂Manganite型锰氧化物。     

理想费米气体和理想玻色气体为工作物质的可逆循环的效率

以理想费米气体和理想玻色气体为工作物质，研究了两种可逆循环的效率，结果与卡诺定理一致