下喷自吸环流反应器内液相局部流动特性

对下喷自吸环流反应器内气－液两相流和气－液－团三相流体系的液相局部流动特性进行了实验研究．用改进皮托管对液相瞬时速度进行了测量，并借助湍流统计理论对渡相平均速度、液相湍动速度和湍动微尺度等液相局部流动参数进行了统计分析和处理，着重讨论了喷射液体流量和固体粒子加入量分别对喷射有效区和导流筒内管流区液相局部流动参数的影响．     

环管反应器中高粘度催化剂的混合特征研究

探讨了环管反应器中高粘度催化剂的混合特征，研究了液体循环速率、催化剂粘度对混合过程的影响，并对混合过程进行了观察分析，建立了该过程的教学模型，模型值和实验值吻合较好。     

Numerical Simulation of Unsteady-State Flowsin Bubble Column Reactors

Thebubblecolumnreactor (BCR) ,withbatchfeedandcontinuousgasaerated ,hasobtainedwideapplica tionsinbiochemicalengineering ,chemicalengineeringandwastewatertreatment ,etc .OneimportantfeatureofBCRisthattheconversionandtheyieldofthereactioncanbehighlyincreasedundertheunsteady stateopera tion .Sincethemassandtheheattransferpropertiesinaprocessmainlydependontheflowbehavior ,itisstronglydesirabletoinvestigatetheunsteady stateflowstructurebeforethedesignandscale upofBCRwithhighreactiveconversionsa…     

Novel photocatalytic reactor for degradation of DDT in water and its optimization model

A novel photocatalytic reactor was developed to remove （1,1-bis（4-chlorophenyl）-2,2,2-trichloroethane） （DDT） from water. In the reactor, a cenosphere was used to support TiO2 film made by means of sol-gel. Because the cenospheres were coated with TiO2, their specific gravity was slightly increased from the original 0.6-0.8 to 0.8-0.9, so that they were able to be suspended in water. With the mixed operation of a bubbler, the water in the reactor was in a well-fluidized state. The bottom of the reactor is a sand filter bed, which can be used to prevent the photocatalyst from being lost. A mathematical model of the reactor has been developed in the two primary influential factors： ultraviolet （UV） light intensity and photocatalyst concentration. With such a model, the reactor can be designed more reasonably.     

The formation of academic self-concept and interest in primary school: Examining the generalized internal/external frame of reference model with first- and third-grade children

The generalized internal/external frame-of-reference (GI/E) model explains the formation of self-perceptions and motivational constructs through social and dimensional comparisons. Research examining the GI/E model with primary school children is scarce, especially with first-grade children. Using two fully representative first-grade cohorts and two fully representative third-grade cohorts (N = 21,162; 48% girls) from Luxembourg, we examined the relations between math and verbal achievements and corresponding domain-specific academic self-concepts (ASCs) and interests. In addition, we tested whether the relations between domain-specific achievements and interests are cross-sectionally mediated through ASCs. Positive achievement-ASC and achievement-interest relations were found within matching domains in both grade levels, while the relations between achievements and ASCs and between achievements and interests across nonmatching domains were significantly negative for third-grade children. For first-grade children, the majority of cross-domain relations were nonsignificant, except for the path between math achievement and verbal interest. For school children in both grade levels, domain-specific ASCs were found to mediate the relation between achievements and interests. Overall, the findings indicate that social comparisons play an important role in the formation of domain-specific ASCs and interests for both grade levels, while dimensional comparisons are not as important in the first school year as it is later in the third grade. Gender and cohort invariance were established in both grade levels.