Experimental Study on the Oxidation of CO Using Pulsed Corona

Experimental study on the oxidation of CO using pulsed corona has been performed.The results show that the rate of removal of CO could be reached up to more than 80%.It could be applied in the industrial control of air pollution.     

Application of the Weibull Distribution for the Recognition of Transformer PD Phenomena

The problem of identification of partial discharge phenomena occurring in a transformer insulating system is addressed. Under the assumption that different PD sources can produce pulse of different PD distributions, five typical artificial defects have been designed to compare the PD distributions coming from different sources, such as internal voids, surface and corona discharges. In this aim, Weibull distribution has been introduced to estimate the parameters and the least square methods (LSM) have been used to estimate the parameters. The goodness of fit to a Weibull distribution is checked by the Cramer-von-Mises (CVM) test. It is shown that the probability function fits well the partial discharge height distribution. By this way,different discharge sources can be distinguished. by Weibull parameter. In addition, the recognition of two or more PD phenomena simultaneously active is approached by means of an additive Weibull distribution. It allows quantities related to each of the two or more superimposed PD phenomena to be estimated, according to the Weibull parameters and the standard mean quantities.     

The Influences on Photocatalyzing Properties of TiO2

An immobilized TiO 2 photocatalyst is choosed to treat phenol dicharge. The authors study the remove efficiencies under different conditions through experiments, such as lamping lights,time that the photocatalyst is lamped,pH of phenol dicharge and so on. It is showed that a satisfactory can be presented in the condition that the photocatalyst is lamped by mercury light and the time that light lamping lasts 5 hours long and pH of phenol dicharge is in 2.0.     

软硬双床AF-好氧工艺处理白酒废水的研究

[目的]研究两级软硬双床AF结合好氧工艺对白酒废水进行处理的最佳运行参数.[方法]采用两级软硬双床AF反应器结合好氧折流沟对白酒废水进行处理,实现白酒厂废水的达标排放及沼气能源的充分回收.[结果]试验表明,在常温条件下,采用连续进料方式,一级软硬双床AF最佳HRT为4d,OLRCoD为2.50 kg/（m^3·d）,COD降解率可达到68.99％,出水COD的质量浓度可稳定在3 500mg/L左右;二级软硬双床AF最佳HRT为2d,OLRCOD为3.75 kg/（m^3·d）,出水COD的质量浓度可稳定在600 mg/L左右;进一步采用双填料好氧折流沟处理,可以实现达标排放.[结论]研究可为白酒废水的达标排放提供参考依据.     

Population size in stream-living juveniles of lake-migratory brown trout Salmo trutta L.: the importance of stream discharge and temperature

Abstract –  Based on the analysis of 17 successive year-classes, this investigation attempted to identify the factors determining year-to-year variation in population size of the stream-living juveniles of Lake Hald-dwelling brown trout Salmo trutta L. Population size appeared to be influenced chiefly by annual recruitment that in turn, was determined by stream discharge and temperature. These patterns matched those previously highlighted for a resident population located >2500 km apart and emphasised the importance of environmental (climatic) variability as a major regulating agent of population size in stream brown trout. However, distinctly shaped recruitment–discharge relationships between the two populations suggested different mechanisms in response to environmental variability and thus to persist in time.     

有机微量元素对生长猪生长性能及微量元素排出量的影响

选用96头平均体重为（19.13±1.18）kg生长猪,分为处理1组（高剂量无机微量元素组）、处理2组（高剂量有机元素组）、处理3组（低剂量无机元素组）、处理4组（高剂量有机元素组）,每个处理3个重复,每个重复8头仔猪,试验期50 d,研究有机微量元素对生长猪生长性能及微量元素排出量的影响力。结果表明：处理1、2、4组的日增重分别比处理3组提高5.83%、7.03%、7.70%,均显著高于处理3组（P＜0.05）,其他处理组之间的日增重差异不显著。处理1、2、4组的料重比分别比处理3组降低5.28%、6.79%、7.92%,均达差异显著（P＜0.05）,处理1、2、4组之间的料重比差异不显著,处理4组的料重比最低。处理1组和处理2组粪中铜、铁、锌、锰的排泄量差异均不显著,处理3组和处理4组粪中铜、铁、锌、锰的排泄量差异均不显著,处理3组和处理4组粪中铜、铁、锌、锰的排泄量比处理1组和处理2组显著降低（P＜0.05）。     

排污和溢油对杭州湾水质的影响

应用非线性移动边界有限元法的水动力和水扩散数值模型，研究了杭州湾流场的时空变化；计算了上海金山炼油厂水域污水排海对杭州湾水质影响的范围和强度；研究了不同气象条件下，溢油事故可能造成的污染风险。结果表明：杭州湾潮差大、潮流急、垂向混合作用强，当水域排污强度为１．９２×１０４ｍ３／天时，舟山本岛水域的污水浓度是排海污水浓度的十万分之一。冬季静风憩流时溢油，污染时间最长，强度最大；偏南风时，溢油码头附近的边滩及沿岸水域污染程度最严重，风险最大。由于成品油具有挥发性，因此溢油油膜在距溢油处为中心的半径１２ｋｍ范围内挥发殆尽。     

PD Pattern Recognition Using Complex Wavelet Transform Coefficient As The Feature

Complex wavelet transform can characterize the partial feature of the PD signal in time-domain and frequency-domain,and provides the unique phasic information.In this paper,the PD pulse waveforms which are created by 4 typical insulated defects are transformed by complex wavelet,and then the complex wavelet coefficient's real part,imaginary part and compound coefficient are clustered by the Fuzzy c-means,the energy of the cluster is the feature of pattern recognition.Discharge samples are got through large number of experiments,and BPNN can identify the PD created by 4 typical insulated defects effectively.The results show that the feature extracted from compound coefficient is better than the feature extracted form the real part and imaginary part of complex wavelet coefficient or wavelet coefficient.     

筒仓粳稻过夏降温保质技术：换气扇通风技术的研究

采用换气扇通风技术对锥底砖砌立筒仓储藏的粳稻进行小功率、微风速、低风量、和时间的微夺主缓速通风。充分利用粮堆层间温差大的特点，保持了粮堆原有的低温、又降低了堆局部的高温，使粮食安全度夏。其设备简单，耗电量低，经济效益显著。     

叶片厚度对轴流泵性能影响及内部流场分析

为研究叶片厚度对轴流泵性能影响及其内部流场变化规律,该文采用圆弧法和流线法进行比转速550、转速2900r/min的QY90-4.4-1.5型潜水轴流泵水力模型设计,完成产品开发及样机型式试验。通过加厚叶轮叶片进行对比试验,阐明泵流量—扬程、流量—轴功率和流量—效率曲线产生差别的原因。采用计算流体动力学(CFD)方法进行叶片厚度对流场影响的数值计算,得到最优工况叶片表面相对速度分布和不同工况叶片表面静压分布。经过分析,阐明薄叶片总体性能优于厚叶片,但抗汽蚀性能可能劣于厚叶片。厚叶片翼型脱流、叶片进出口出现回流及二次流情况更为严重,水力损失较大,是泵效率等性能参数偏低的主要原因。