Метод искусственного замораживания грунта при проведении ремонтно-восстановительных работ на подземных трубопроводах в условиях болот

Объектом исследования является: методы обеспечения устойчивости грунта в условиях болот для проведения ремонтно-восстановительных работ. Цель работы – анализ методов повышения устойчивости грунта в условиях болот при ремонтных работах, выбор метода закрепления грунтов и его обоснование. В процессе работы были тщательно изучены технологии и устройства для ремонта участка нефтепровода в условиях болот ограничения по их применению, достоинства и недостатки каждого.The object of the research is: the methods of providing soil stability under the conditions of wetlands for the repair work. Purpose - analysis of methods for increasing the stability of the ground in a marsh during repair work, the choice of the method of fixing the soil and its justification. In the process, we have been carefully studied technology and devices for repair in a section of the pipeline marshes restrictions on their use, advantages and disadvantages of each

High Methanol Oxidation Activity of Well-Dispersed Pt Nanoparticles on Carbon Nanotubes Using Nitrogen Doping

Pt nanoparticles (NPs) with the average size of 3.14 nm well dispersed on N-doped carbon nanotubes (CNTs) without any pretreatment have been demonstrated. Structural properties show the characteristic N bonding within CNTs, which provide the good support for uniform distribution of Pt NPs. In electrochemical characteristics, N-doped CNTs covered with Pt NPs show superior current density due to the fact that the so-called N incorporation could give rise to the formation of preferential sites within CNTs accompanied by the low interfacial energy for immobilizing Pt NPs. Therefore, the substantially enhanced methanol oxidation activity performed by N-incorporation technique is highly promising in energy-generation applications

酸化物ガラスの塩基度と XPS による O1s 化学シフトの相関に関する考察

O1s binding energy measured by X-ray photoelectron spectroscopy (XPS) is candidate as a new tool to determine a new scale of Lewis basicity of oxide ions in glass. Some mathematical expressions for the basicity or XPS chemical shift, such as charge parameter and optical basicity, were compared with the experimental O1s binding energy in binary alkali oxide glasses. The expressions so far in use needed some modification in parameters. A new empirical expression introduced in this paper gives a new concept and universal scale of basicity

ISOTOPIC EFFECTS IN XPS SPECTRA OF H2O AND D2O

XPS results on the valence electron spectra of H2O and D2O show small but clearly detectable isotope effects. For the outermost 2B1,2A1, and 2B2 states the effects are comparible with the earlier UPS-results. For the inner valence levels the isotope effects are demonstrated for thefirst time