辰山植物园主入口建筑西侧高填土不利影响的控制处理措施

主入口综合建筑是上海辰山植物园中重要的大型单体建筑之一,该建筑西侧与绿环高填土相接。绿环高填土标高达到16.500 m,为工程中最高填筑点。主入口建筑西侧高填土初始方案由于工期原因难以贯彻,经过方案调整,最终方案采用高桩承台形式。通过考虑并分析路堤桩区域高填土对主体建筑桩基的不利影响,经不断调整,最后得到合理的施工工序...     

„Ideale“ Lötverbindung und „optimale“ Lötverbindung

If due to the market analysis a company makes the decision for the production of a new product by application of soldering and special the soldering with temporarily liquid solder, this one is then made specifically after that the company specific construction and production preparation. Either the decision for soldering is technically and/or economically well‐founded or she is even unavoidable by so‐called mixed material connections in the assemblies. This hybrid design finds application increasing today. In the contribution on hand the analysis and assessment of the soldering theory and practice is carried out under the point of view of the possible production of “ideal soldered connections” and “optimal soldered connections”.     

Antoni Gaudí and Frei Otto: Essential Precursors to the Parametricism Manifesto

As Senior Architect to the Basilica of the Sagrada Família in Barcelona, Mark Burry has been ‘thinking parametrically’ for almost his entire career. Here he describes how his longstanding role overseeing the completion of Antoni Gaudí's masterpiece has afforded unique insights into the work of a great geometer and parametric thinker. Burry places the contribution of Gaudí alongside that of Frei Otto – the other eminent 20th-century Proto-Parametricist.     

Fluid-phase equilibria in binary systems containing an ionic liquid. Application of the Percus-Yevick-van der Waals equation of state

Following some simplifications to reduce the computational effort, the Percus-Yevick-van der Waals equation of state is used to calculate the isothermal total pressure of a binary liquid system containing one volatile nonelectrolyte liquid and one nonvolatile ionic liquid. Pure-component parameters a and b are found from pure-component enthalpy-of-vaporization and liquid-density data. The single binary parameter a₁₂ is obtained from Henry's constant for the nonelectrolyte in the ionic liquid. For 10 binary systems, calculated total pressures are in good agreement with experiment although in a few systems observed total pressures are slightly higher than those calculated in the region where the ionic liquid is dilute. Brief attention is given to a few binary systems with a miscibility gap.     

Simple Views on Metal/Oxide Interfaces: Contributions of the Long-Range Interactions to the Adhesion Energy

The image and van der Waals contributions to the metal/oxide work of adhesion are compared through the extent to which they follow the known prevalent trends, i.e. the increase in work of adhesion (a) with narrowing oxide band gap and (b) with increasing conduction electron density of the metal. The van der Waals interaction is shown to follow both trends, while the image term is suggested to be significant only for dense metals in contact with very ionic oxides. The relative contribution of these long-range interactions to the overall metal/oxide work of adhesion is found to be maximized for systems involving metals with low electronic densities and oxides with wide band gaps. At variance, high metallic electronic densities and narrow oxide gaps likely favour short-range interactions arising from charge transfer.     

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.     

A Model for Liquid-Striped Liquid Phase Separation in Liquids of Anisotropic Polarons

The phase separation between a striped polaron liquid at the particular density and a high density polaron liquid is described by a modified Van der Waals scheme. The striped polaron liquid represents the pseudo gap matter or Wigner-like polaron phase at 1/8 doping in cuprate superconductors. The model includes the tendency of pseudo-Jahn-Teller polarons to form anisotropic directional bonds at a preferential volume with the formation of different “liquid phases”. The model gives the coexistence of a first low density polaron striped liquid and a second high density liquid that appears in cuprate superconductors for doping larger than 1/8. We discuss how the strength of anisotropic bonds controls the variation the phase separation scenarios for complex systems in the presence of a quantum critical point where the phase separation vanishes.