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排序方式: 共有1465条查询结果,搜索用时 15 毫秒
941.
942.
Marco Domp Francisco J. Cedano‐Serrano Olaf Heckert Nicoline van den Heuvel Jasper van der Gucht Yvette Tran Dominique Hourdet Costantino Creton Marleen Kamperman 《Advanced materials (Deerfield Beach, Fla.)》2019,31(21)
Sandcastle worms have developed protein‐based adhesives, which they use to construct protective tubes from sand grains and shell bits. A key element in the adhesive delivery is the formation of a fluidic complex coacervate phase. After delivery, the adhesive transforms into a solid upon an external trigger. In this work, a fully synthetic in situ setting adhesive based on complex coacervation is reported by mimicking the main features of the sandcastle worm's glue. The adhesive consists of oppositely charged polyelectrolytes grafted with thermoresponsive poly(N‐isopropylacrylamide) (PNIPAM) chains and starts out as a fluid complex coacervate that can be injected at room temperature. Upon increasing the temperature above the lower critical solution temperature of PNIPAM, the complex coacervate transitions into a nonflowing hydrogel while preserving its volume—the water content in the material stays constant. The adhesive functions in the presence of water and bonds to different surfaces regardless of their charge. This type of adhesive avoids many of the problems of current underwater adhesives and may be useful to bond biological tissues. 相似文献
943.
Walther Julie Bessette Carole Decrette Mathieu Tourlonias Michel Bueno Marie-Ange Osselin Jean-Franois Charleux Franois Coup Dominique 《Applied Composite Materials》2022,29(1):245-262
Applied Composite Materials - For some severe applications, pieces are made in composite materials with woven fabrics reinforcements: interlock. High yarn density and specific weaving pattern can... 相似文献
944.
There is now on the market a profusion of technological devices to build plants. These devices are standardized to facilitate their dissemination and integration. The standards are technology driven because they are mainly elaborated by vendors for the design and delivery of complex plants. Operating plants means to control, maintain and manage them. Plants are operated by skilled operators, whose knowledge is mainly acquired by experience and feedback. The aim of this paper is to pave the way to master the complexity of plant operation, through explicit representation, and to help operators improve safety, productivity and reduce environmental impact. 相似文献
945.
Renato Froidevaux Dominique Vercaigne‐Marko Romain Kapel Didier Lecouturier Sookhyun Chung Pascal Dhulster Didier Guillochon 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2006,81(8):1433-1440
The continuous hydrolysis of bovine haemoglobin at pH 3 in a triphasic reactor was studied in order to prepare two pure transient and hydrophobic opioid peptides in one step. A continuous stirred‐tank reactor was designed to extract continuously and selectively LVV‐haemorphin‐7 and VV‐haemorphin‐7 by a butan‐2‐ol–octan‐1‐ol mixture in the course of bovine haemoglobin hydrolysis by pepsin immobilised on A568 Duolite resin. The residence time in the aqueous and organic phases was maintained at 1 h. This system allowed a steady state to be achieved for haemorphin concentrations in each phase and the pepsin stability to be maintained. Finally, success was achieved in producing and extracting continuously the two haemorphins in the aqueous/butan‐2‐ol–octan‐1‐ol biphasic medium for more than 10 bed volumes of the reactor. Copyright © 2006 Society of Chemical Industry 相似文献
946.
Denial of responsibility as a mode of dissonance reduction and the conditions under which it is likely to occur were explored in 3 experiments. Two experiments tested and supported the hypothesis that following a counterattitudinal behavior, participants prefer the mode of reduction made available to them first, regardless of whether it is attitude change, trivialization, or denial of responsibility. The 3rd experiment tested and supported the hypothesis that denial of responsibility reduces the negative affective state induced by dissonance. The mechanism of denial of responsibility in dissonance reduction is discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
947.
数据关联是多目标跟踪的一个重要部分,作者对基于证据合成和简易JPDA的数据关联方法进行了比较。蒙特卡罗仿真结果表明,基于证据合成的方法可以改善跟踪精度,能适应目标数目不确定的场合。 相似文献
948.
Numerical study of the impact of fluid density on the pressure distribution and stimulated volume in the Soultz HDR reservoir 总被引:1,自引:0,他引:1
During the last 5 years the European hot dry rock project (HDR) at Soultz-sous-Forêts (France) has made significant progress. Three approx. 5000-m deep wells have been drilled into the crystalline basement and hydraulically stimulated. These operations have provided a great deal of information on the subsurface, especially from the interpretation of the monitored induced microseismic events. To better understand the development and hydraulic behaviour of the fractured reservoir, a numerical model based on a discrete fracture network approach has been written to interpret and predict the pressure distribution in the HDR reservoir. The hydraulic part of this finite volume code is strongly coupled with the mechanical behaviour of the fractures.Recent modelling studies have demonstrated that the density difference between the in situ (native) reservoir fluid (density 1060 kg/m3) and the injected fluid (dense brine or fresh water) might play a significant role in the hydraulic stimulation of the reservoir. The decision was therefore taken to enhance the numerical code, under the assumption of immiscibility of the two fluids.The improved code permits us to evaluate the impact of fluid density differences on the pressure distribution in the reservoir during stimulation or fluid circulation tests. It provides better estimates on both the extension and shape of the stimulated areas, and can be used to define new stimulation strategies. The code has also been successful in predicting changes in fluid flow distributions in the reservoir, especially in fractures intersecting the wells, as well as in estimating trace breakthrough times. 相似文献
949.
We present a bijection between the set of plane triangulations (aka maximal planar graphs) and a simple subset of the set
of plane trees with two leaves adjacent to each node. The construction takes advantage of Schnyder tree decompositions of
plane triangulations. This bijection yields an interpretation of the formula for the number of plane triangulations with n
vertices. Moreover, the construction is simple enough to induce a linear random sampling algorithm, and an explicit information
theory optimal encoding. Finally, we extend our bijection approach to triangulations of a polygon with k sides with m inner
vertices, and develop in passing new results about Schnyder tree decompositions for these objects. 相似文献
950.