基于磷酸盐还原过程的食品发酵废水厌氧除磷工艺研究

采用具有磷酸盐还原功能的菌株,对模拟的食品发酵废水进行厌氧除磷工艺研究。通过向厌氧反应器投加前期筛选得到的磷酸盐还原菌进行污泥驯化、正交试验和单因素实验,确定食品发酵废水厌氧除磷工艺的最佳工艺条件。研究结果表明:经过12个周期的驯化,使投加菌株的污泥具有良好的生化和除磷性能,反应器出水CODCr和总磷质量浓度分别为319.60mg/L和13.58mg/L,相应去除率分别为69.43%和20.95%。厌氧除磷工艺最佳工艺条件为培养温度30℃、pH值为7、氮源为蛋白胨+NH₄Cl+NaNO₃,总磷质量浓度为17.5mg/L,总磷去除率可达37.96%,产生的PH₃的磷含量占总磷去除量的24.61%。     

属性约简的两阶段遗传算法

属性约简是数据挖掘的一个重要研究内容. 为了解决具有多种属性类型的决策表约简问题,在粗集和二元关系聚合理论的基础上,利用属性重要性作为评价标准,提出了一种两阶段遗传约简算法. 算法的第一阶段是为了找出尽可能多的约简,第二阶段力求寻找最小约简. 根据算法每个阶段的目标设计了编码方案、种群规模、适应度函数、终止条件、选择、变异和修正操作. 实验表明,与标准遗传算法相比,两阶段算法在计算最小约简时更为准确和稳定.     

本土化视域下影视字幕翻译策略研究

字幕翻译应通过对源语信息进行浓缩、简化、省略等减译处理,给观众提供通俗易懂、简洁流畅且符合人物个性的字幕语言,让观众迅速准确地明白剧情。翻译的难度在于文化信息的转换,翻译时应尽力保留源语独特的表达方法,诸如词语、比喻、典故、人名等应直译,以体现源语及其文化的瑰丽;不得已时,再采用意译,以达到与源语功能的对等。意译时,可采用适度的娱乐化改写或本土化策略。     

Giving up on convergence and autonomy: Why the theories of psychology and neuroscience are codependent as well as irreconcilable

There is a long-standing debate in the philosophy of mind and philosophy of science regarding how best to interpret the relationship between neuroscience and psychology. It has traditionally been argued that either the two domains will evolve and change over time until they converge on a single unified account of human behaviour, or else that they will continue to work in isolation given that they identify properties and states that exist autonomously from one another (due to the multiple-realizability of psychological states). In this paper, I argue that progress in psychology and neuroscience is contingent on the fact that both of these positions are false. Contra the convergence position, I argue that the theories of psychology and the theories of neuroscience are scientifically valuable as representational tools precisely because they cannot be integrated into a single account. However, contra the autonomy position, I propose that the theories of psychology and neuroscience are deeply dependent on one another for further refinement and improvement. In this respect, there is an irreconcilable codependence between psychology and neuroscience that is necessary for both domains to improve and progress. The two domains are forever linked while simultaneously being unable to integrate.     

Benthic foraminiferal δ~(13)C minimum events in the southeastern Okhotsk Sea over the last 180 ka

A total of six d13C minimum events,i.e.,VI,V,IV,III,II,and I,were observed via a stable carbon and oxygen isotope analysis of infaunal benthic foraminifera Uvigerina spp.in gravity core OS03-1 in the southeastern Okhotsk Sea over the last 180 ka.These events occurred at112–109,102–90,85–76,57–54,44–40,and 17–10 ka BP.The largest negative excursions reached 2.5%in event V and were greater than 1%in the other events.We proposed that all d13C minimum events were caused by the increase in sea surface water productivity,the weakened formation of Okhotsk Sea intermediate water,and the enhancement of the oxygen minimum zone.The negative excursions were unaffected by methane hydrate destabilization and subsequent methane release based on the results obtained by using archaeal lipid markers.     

采用自定义阈值的计算奇异扰动在构建二甲醚简化机理上的应用

将自定义误差阈值的计算奇异扰动(CSP)应用于包含55种物质和290步反应的二甲醚的详细机理上，构建了包含26种物质和20步反应的简化机理.开发了一套基于该算法的计算机程序--I-CSP.程序的输入数据包括:① 详细的反应机理；② 在Chemkin中计算的结果；③ 准稳态物质的数量.然后,将简化机理在均匀的反应器(包括自燃反应器和完全搅拌器)中进行验证.结果发现，计算结果与详细机理相比符合得相当好; 但当在非均匀反应器(一维、稳态、自由扩展预混合火焰)中验证时，结果显示出一定偏差.     

基于气基直接还原-熔分的硼铁矿高效利用新工艺

实验室条件下,以含硼铁精矿为原料制备氧化球团,对含硼铁精矿气基竖炉直接还原-电炉熔分新工艺进行了研究.结果表明,含硼铁精矿是良好的造球原料,1 200℃下焙烧20 min后,成品球团抗压强度可达2 500 N以上,满足气基竖炉直接还原工艺要求.在H2与CO体积比大于2/5且温度在850~1 000℃条件下,含硼铁精矿氧化球团还原率达到95%的时间为15~60 min,还原膨胀率不高于15%.在高温下电热熔化DRI后硼和铁可以高效分离,硼、铁收得率均可达到98%以上,富硼渣中B2O3的质量分数在21%以上,活性可达89%左右,是"一步法"生产硼酸的优良原料.含硼铁精矿气基竖炉直接还原电炉熔分新工艺可以实现硼铁高效分离和清洁利用.     

一种基于属性相关性度量的朴素贝叶斯分类模型

本文通过分析属性相关性的度量和属性约简,提出一种基于属性相关性度量的朴素贝叶斯分类模型EANBC。实验结果表明,与朴素贝叶斯分类模型相比,EANBC分类模型具有较高的分类正确率。     

负载型钼氧化物催化剂NH3选择性催化还原NOx

通过浸渍法制备了Mo/TiO2,Mn-Mo/TiO2和Mo-Mn/TiO2三种催化剂,采用X射线衍射(XRD)、比表面积测定(BET)、拉曼光谱(LRS)、原位红外(in situ FT-IR)、扫描电镜(SEM)等技术进行相关的微观表征分析.在模拟氨气选择性催化还原NO的反应条件下(NH3-SCR)对催化剂的脱硝反应...     

超声波浸渍法制备MnOx/TiO2催化剂低温选择性催化还原NO

采用超声波浸渍法、传统浸渍法和溶胶凝胶法制备了一系列的MnOx/TiO2催化剂,采用X射线衍射(XRD)、比表面积测定(BET)、原位红外(in situ FT-IR)、高分辨率扫描电镜(HRTEM)程序升温还原(TPR)等技术进行表征,同时在模拟氨气选择性催化还原NO的反应条件下( NH3-SCR)对催化剂的低温反应...