应用摆动装车溜槽技术改造港口装车站

湛江港300号泊位装车站直通式装车溜槽使用效果不理想,存在故障频繁、粉尘大、能耗大等问题。把直通式装车溜槽改造成摆动装车溜槽后,达到了节能、环保、降低劳动强度的目的,为港口其他装车站的改造建设提供了经验。     

Type-II van der Waals heterostructures of GeC,ZnO and Al2SO monolayers for promising optoelectronic and photocatalytic applications

Two-dimensional materials stacked via van der Waals (vdW) forces provide a revolutionary route toward high-performance optoelectronic and renewable energy devices. Here, we report vdW heterostructures (vdWHs) consisting of GeC, ZnO and Al₂SO monolayers on first-principles computations. GeC (ZnO)–Al₂SO vdWHs are both stable type-II semiconductors with indirect (direct) band gaps. This significantly suppresses the recombination of photogenerated charge carriers across the interface, making them promising for light detection and harvesting applications. Charge transfer from GeC (Al₂SO) layer to Al₂SO (ZnO) layer leads to p-doping in GeC (Al₂SO) and n-doping in Al₂SO (ZnO) of GeC (ZnO)–Al₂SO vdWHs. In contrast to pristine monolayers, higher carrier mobility promotes charge transfer to the surface and reduces carrier recombination in GeC (ZnO)–Al₂SO vdWHs. Further, the absorption spectra indicate redshift (blueshift) and reveal more solar light is absorbed by GeC (ZnO)–AlS₂O vdWHs in the visible (ultraviolet) region. The band edge positions suggest that GeC–Al₂SO vdWHs can reduce water into H₂ but fails to perform an oxidation reaction at pH = 0. More interestingly, ZnO–Al₂SO vdWHs can perform redox reactions, making them prominent for overall water-splitting reactions. Our computational findings provide a path for the design of vdWHs for future optoelectronic and photovoltaic devices.     

车厢式移动空气监测站的改造及应用

车厢式移动空气监测站是一种将空气自动站改造为车厢形式,通过与皮卡车组装,实现其流动监测的功能,是适应于中小城市运用于大气流动监测的技术。文中介绍了车厢式移动空气监测站的改造细节和应用特点。     

轧机机组中小车拖动扭矩或功率的计算

通过对轧机机组中运输小车的受力分析,建立了力学模型,推导出小车的拖动功率或扭矩选取公式,可以用于指导设备设计及设备的维护。     

Effects of bulk and surface properties of materials on adhesion-induced deformations between submicrometer diameter particles and substrates

—Spherical particles of polyvinylidene fluoride (PVF₂), of 0.3 μm diameter, were deposited onto various substrates including polyester, a polyester-polydimethylsiloxane block copolymer (hereafter referred to as PSBC), and polished silicon. The adhesion force-induced deformations between the particles and substrates were then observed using scanning electron microscopy (SEM). It was found that the particles embedded most deeply into the soft PSBC. No embedding of the particles into the Si wafers was observed, although the particles, themselves, appeared to flatten. The particles were also observed to embed into the polyester, although to a lesser extent than they did into the PSBC. Moreover, when the particles contacted samples of polyester which had been plasma-treated in argon, the embedding decreased. Measured contact area diameters are compared to predictions of various models of adhesion. The effect of the thickness of a conducting (Au/Pd) coating on the appearance of the contact zone is also discussed.     

Facing drift: a comparison of three methods

Drift is a common phenomenon in active sensors and, if left untreated, is generally the limiting factor in their performance. It is shown that drift and spread in sensor characteristics are tightly interwoven due to finite sensitivity to biasing parameters. Modern treatments of drift are dynamical under operating conditions, notably so chopping, the sensitivity variation method and the recently introduced van Putten-method. These methods differ in regards to drift-dependence on biasing. In their application to silicon flow sensors, the first two reduce but do not eliminate drift. The geometric van Putten-method leaves biasing invariant, which eliminates drift and obtains uniform sensor-characteristics leaving drift-free operation.     

武钢铁路车辆用耐候钢的开发

介绍了武钢生产的铁路车辆用耐候钢的特点，分析稀土对Cu—P系列耐候钢的作用机理，并介绍武钢正在开发的耐候钢新钢种。     

Dispersive forces of particle–surface interactions: direct AFM measurements and modelling

Fundamentals of particle–particle interaction are of great interest in agglomeration processes. Particle adhesion depends on dispersive forces (van der Waals force), local chemical bindings, Coulomb force and capillary attractions. Additionally, surface properties like roughness, adsorption layers and surface chemistry strongly affect adhesion forces. van der Waals interactions are poorly understood because popular ab initio force calculations for molecules like density functional theory (DFT) often do not lead to proper results. van der Waals forces are difficult to measure directly. We present direct measurements of particle–particle and particle–surface interactions in the gas phase carried out with an atomic force microscope (AFM). Special emphasis is given to a proper statistical treatment of the data. For modelling of particle adhesion, we use computer-assisted empirical potential methods. Parameters like adsorbed water and surface roughness are considered. We extract parameters for weak interactions from the Lifshitz theory and gas adsorption data. Adsorbing molecules can be used as probes to measure dispersive forces. Studying surface and particle properties combined with computer-assisted modelling is a basic requisite to reach the aim of predicting particle–particle interactions in industrial processes.     

A Novel Parsimonious Neurofuzzy Model Applied to Railway Carriage System Identification and Fault Diagnosis

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