Polyetherimide-LaNi5 composite films for hydrogen storage applications

This study investigates the preparation of polyetherimide (PEI) – LaNi₅ composites films for hydrogen storage. Prior to the polymer addition, LaNi₅ was ball-milled at different conditions (250, 350, and 450 RPM) and annealed at 500 °C for 1 h under vacuum. The composites were produced with BM-LaNi₅-350 (PEI/LaNi₅-350) and annealed BM-LaNi₅-350 (PEI/LaNi₅-350-TT). Membranes were successfully produced through solvent casting assisted by an ultrasonic bath. The particles dispersion and the film morphology did not change after hydrogenation cycles. In the H₂ sorption experiments at 43 °C and 20 bar, the films stored H₂ without incubation time; both samples reached a capacity of ~0.6 wt%. The H₂ sorption kinetics of PEI/LaNi₅-350 was comparable to that of BM-LaNi₅-350, whereas PEI/LaNi₅-350-TT presented significantly slower kinetics. LaNi₅ oxidation was hindered by PEI, showing that it can be explored to improve metal hydrides air resistance. The results demonstrated that PEI films filled with LaNi₅ are promising materials for hydrogen storage.     

基于时频分布的发动机异响特征分析及故障诊断研究

针对发动机异响故障振动信号的时变非平稳特性 ,引入一种重分配方法 ,得到干扰项少而分辨率高的重分配平滑伪魏格纳维尔分布 (RSPWVD) ,对发动机活塞敲缸响、活塞销响、曲轴轴承响、连杆轴承响、气门响和挺杆响等常见异响故障特征信号进行了比较分析 ,并提出了一种基于 RSPWVD的发动机多异响故障诊断策略。试验结果表明 ,采用 RSPWVD可以有效地提取异响故障特征信息 ,利用基于RSPWVD的诊断策略可以准确识别不同的发动机异响故障。     

进展期胃癌介入治疗疗效分析

目的研究进展期胃癌的介入治疗及疗效。方法对２１２例进展期胃癌进行介入治疗。对贲门癌经胃左动脉和左膈下动脉或脾动脉进行化疗灌注和胃左动脉栓塞;对胃体小弯侧癌经胃左、右动脉或肝总动脉,对胃大弯侧癌经胃十二指肠动脉、胃网膜右动脉或脾动脉化疗灌注;对胃窦癌经胃十二指肠动脉或对胃网膜右动脉中段栓塞后进行化疗药物灌注。对胃癌复发和残胃癌经腹腔干和肠系膜上动脉化疗灌注。结果对未手术的１９３例胃癌的疗效为贲门癌CR＋PR５３．１％,胃体癌CR＋PR４４．４％,胃窦癌CR＋PR１０．０％,胃癌复发和残胃癌CR＋PR０。贲门癌与胃体癌有效率相比（P＞０．２５）,两者差异无统计学意义。贲门癌与胃窦癌相比及胃体癌与胃窦癌相比,差异有统计学意义（P值均＜０．０５）。介入治疗后手术切除者术后１、２年生存率分别为８１％、５６％。结论胃癌在胃组织的发病部位不同,其疗效也不同,贲门癌和胃体癌的疗效较好,胃窦癌及胃癌复发和残胃癌疗效较差。     

Magnetic field effects on g-jitter induced flow and solute transport

Numerical modeling and analyses are presented of magnetic damping of g-jitter driven fluid flow and its effect on the solutal striation in a simplified Bridgman-Stockbarger crystal growth system under microgravity. The model development is based on the finite element solution of the momentum, energy and solute transport equations under g-jitter conditions in the presence of an external magnetic field. The numerical model is verified by comparison with analytical solutions obtained for a simple parallel plate channel flow driven by g-jitter in a transverse magnetic field. Simulations are carried out to study the behavior of convective flow and solutal transport induced by the combined g-jitter and magnetohydrodynamic forces. Both the idealized single frequency g-jitter force and the real g-jitter perturbation taken during space flight are considered. Results indicate that an applied magnetic field can effectively damp the velocity caused by g-jitter and help to reduce the time variation of solute redistribution. A stronger applied field is more effective in suppressing the convective flows and hence reducing concentration variation. It is found that g-jitter driven flows have the same oscillation period as the driving force with or without the applied field. However, an applied magnetic field shortens the transient period over which the flow field evolves into a quasi-steady state time harmonic oscillation after g-jitter sets in. The flow intensity increases with an increase in g-jitter magnitude but decreases with an increase in the applied field strength. The reduced convection in the liquid pool by the applied magnetic field results in a reduction of the concentration oscillation. The magnetic field is very useful in suppressing the spiking velocities that are induced by the spikes in the real g-jitter data. The damping effect is more pronounced if the magnetic field is switched on before the onset of g-jitter disturbances.     

BANQ餐厅 美国波士顿

正Banq餐厅位是一家新型餐厅,位于便士储蓄银行(Penny Savings Bank)旧大楼以前用来经营银行业务的大厅内。餐厅分成两个部分,前面区域面向华盛顿大街,设计成酒吧,后面的大厅则作为用餐区。然而,这个空间在z轴上以天花板和地面之间的另一个分区为中心进行设计。如果由于餐厅空间活动的多变性而需要保持灵活性——包括两个座位、四个座位和六个座位,以及与聚会和其他活动有关的座位     

The contextualization of divergent outlooks in a Greenfield master-planned community: a pathway towards reflexivity

Comprehensive design schemes and specifications have progressively shaped Master-Planned Communities (MPCs). The market largely predetermines these outcomes, with background input from communities. Therefore, this paper endeavours to define the fundamental structures that generate differences between market actors and residents within the North Lakes MPC. This study employs ‘habitus theory’, which is a sociological phenomenon describing the divergence of personal outlooks and expertise. The application of this theory is thus illustrative of the evolution of distinct observations within MPCs. Contemporary studies have under-researched these inherent gaps between communities, authorities, and critics, and these frictions could be exacerbated within restrictive developmental contexts. Epistemic and objectified content analyses collated over many years and sources will uncover the underlying differences between the relevant groups. These analyses will enable the progression of a framework for understanding power relation biases and how reflexivity can enhance current consultative methods.     

Residents’ evaluation of advantages and disadvantages of golf community living in Alicante,Spain

The growing numbers of golf communities are attracting a diverse group of homebuyers who experience varying levels of neighborhood satisfaction. A multinomial logistic regression analysis with follow-up ANOVA reveals that homeowners in one region of Spain who believe there are more advantages than disadvantages to living in a golf community are more likely to be older, Spanish, and evaluate the natural environment, sports facilities, and water supply of their community as better. Meanwhile, those who perceive more disadvantages cite the limitations on using the golf course for non-golf activities, high housing costs, automobile dependence, and lack of services and shops. Thus, satisfaction with the golf community varies depending on the residents’ personal characteristics as well as their evaluation of the neighborhood’s characteristics, but is not directly attributable to whether they play golf or whether the course was a decisive factor in choosing the house.