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排序方式: 共有314条查询结果,搜索用时 62 毫秒
81.
Ghalavand Arezoo Hatamipour Mohammad Sadegh Ghalavand Younes 《Clean Technologies and Environmental Policy》2021,23(9):2683-2696
Clean Technologies and Environmental Policy - In this study, four zero liquid discharge thermal desalination processes were technoeconomically investigated to select the most efficient and economic... 相似文献
82.
Younes Sadin Ehsan Taheri Nassaj Hamid Taghipour Armaki Wen-Zhong Lu Wen Lei Hadi Barzegar Bafrooei 《Journal of Materials Science: Materials in Electronics》2018,29(16):13516-13525
This paper studies the microwave dielectric properties, microstructure, vibration and densification of Li2ZnTi3+xO8+2x (\(- 0.04 \le {\text{x}} \le +0.06\)) ceramics, manufactured via a conventional mixed oxide route. The X-ray diffraction and Raman spectroscopy revealed the unit cell parameter and cation ordering in LZT non-stoichiometry in their vibrational modes. The densification and phase composition were characterized by the EDX and SEM methods. It was found that a slight Ti vacancy can improve the relative density to the maximum value (96.2%). The XRD results showed that the second phase of TiO2 in the Li2ZnTi3.06O8.12 composition is formed. The sintered samples were detected in the microwave frequency range by using the resonance technique. The \({\text{~}}{\tau _f}\) values of the ceramics within Ti excess adjusted to near zero. The Li2ZnTi2.96O7.92 ceramic showed the best relative density, single phase and best microwave dielectric \({\varepsilon _r}~={\text{ }}25.98\), Q?×?f?=?61,000 GHz, \({\tau _f}={\text{ }} - 17.4{\text{ ppm/}}^\circ {\text{C}}\) sintered at 1100 °C for 4 h. 相似文献
83.
84.
Transport of Relational Structures in Groups of Diffeomorphisms 总被引:1,自引:0,他引:1
Laurent Younes Anqi Qiu Raimond L. Winslow Michael I. Miller 《Journal of Mathematical Imaging and Vision》2008,32(1):41-56
This paper focuses on the issue of translating the relative variation of one shape with respect to another in a template centered
representation. The context is the theory of Diffeomorphic Pattern Matching which provides a representation of the space of
shapes of objects, including images and point sets, as an infinite dimensional Riemannian manifold which is acted upon by
groups of diffeomorphisms. We discuss two main options for achieving our goal; the first one is the parallel translation,
based on the Riemannian metric; the second one, based on the group action, is the coadjoint transport. These methods are illustrated
with 3D experiments.
相似文献
Laurent YounesEmail: |
85.
Rachid Outbib Guillaume Graton Xavier Dovifaaz Rafic Younes 《International journal of control》2013,86(4):812-826
This paper deals with Diesel engine control. More precisely, a model-based approach is considered to stabilise engine speed around a defined value. The model taken into account is nonlinear and contains explicitly the expression of fuel conversion efficiency. In general in the literature, this experimentally obtained quantity is modelled with either a polynomial or an exponential form (see for instance Younes, R. (1993). Elaboration d’un modèle de connaissance du moteur diesel avec turbocompresseur à géométrie variable en vue de l’optimisation de ses émissions. Ecole Centrale de Lyon; Omran, R., Younes, R., Champoussin, J., & Outbib, R. (2011). New indicated mean effective pressure (IMEP) model for predicting crankshaft movement. Energy Conversion and Management, 52, 3376–3382). This paper focuses on engine speed feedback stabilisation when fuel conversion efficiency is modelled with an exponential form, which is more suitable for automative applications. Simulation results are proposed to highlight the closed-loop control performances. 相似文献
86.
Eid H. Alosaimi Ibrahim Hotan Alsohaimi Hassan M.A. Hassan Qiao Chen Saad Melhi Ayman Abdelaziz Younes 《中国化学工程学报》2023,53(1):89-100
A non-solvent induced phase separation (NIPS) process was used to fabricate a series of sulfonated polyethersulfone (SPES) membranes blending with different concentrations of SBA-15-g-PSPA with the applications in the ultrafiltration (UF) process. SBA-15 was modified with 3-methacrylate-propyltrimethoxysilane (MPS) to form SBA-15-g-MPS. It was further modified with the charge tailorable polymer chains by reacting with 3-sulfopropyl methacrylate potassium salt. The nanoparticles were uniformly dispersed and finger-like channels were developed within the membrane. The adding of surface modified SBA-15-g-PSPA nanoparticles has significantly improved membrane water permeability, hydrophilicity, and antifouling properties. The pure water fluxes of the composite SPES membranes were significantly higher than the pristine SPES membrane. For the membrane containing 5% (mass) of SBA-15-g-PSPA (MSSPA5), the pure water flux was increased dramatically to 402.15 L·m-2·h-1, which is ~1.5 times that of MSSPA0 (268.0 L·m-2·h-1). The high flux rate was achieved with 3% (mass) of SBA-15 nanoparticles with retained high rejection ratio 98% for natural organic matter. The results indicate that the fashioned composite membrane comprising SBA-15-g-PSPA nanoparticles have a promising future in ultrafiltration applications. 相似文献
87.
Abolfazl Akbarzadeh Rogaie Rezaei-Sadabady Soodabeh Davaran Sang Woo Joo Nosratollah Zarghami Younes Hanifehpour Mohammad Samiei Mohammad Kouhi Kazem Nejati-Koshki 《Nanoscale research letters》2013,8(1):102
Liposomes, sphere-shaped vesicles consisting of one or more phospholipid bilayers, were first described in the mid-60s. Today, they are a very useful reproduction, reagent, and tool in various scientific disciplines, including mathematics and theoretical physics, biophysics, chemistry, colloid science, biochemistry, and biology. Since then, liposomes have made their way to the market. Among several talented new drug delivery systems, liposomes characterize an advanced technology to deliver active molecules to the site of action, and at present, several formulations are in clinical use. Research on liposome technology has progressed from conventional vesicles to ‘second-generation liposomes’, in which long-circulating liposomes are obtained by modulating the lipid composition, size, and charge of the vesicle. Liposomes with modified surfaces have also been developed using several molecules, such as glycolipids or sialic acid. This paper summarizes exclusively scalable techniques and focuses on strengths, respectively, limitations in respect to industrial applicability and regulatory requirements concerning liposomal drug formulations based on FDA and EMEA documents. 相似文献
88.
89.
M. A. Younes 《Journal of Petroleum Geology》2003,26(2):211-224
Active oil seepages in the Gebel El-Zeit area (southern Gulf of Suez, Egypt) occur in fault zones on the western flank of the East Zeit Basin. Gas chromatography-mass spectrometry indicates that these oils are rich in tricyclic terpanes and extended hopanes with few diasteranes. These characteristics are typical of oils derived from marine siliciclastic source rocks; an input of terrestrial angiosperms material is indicated by the very high oleanane index of 32.65% and the low gammacerane index of 6.28%. The molecular maturity parameter C29 ααα cholestane [20S/(20S+20R)] is < 0.5 indicating that these oils were generated at relatively low thermal maturities. The seepage oils resemble Miocene crude oils in the East Zeit Basin which are believed to be generated from the Lower Miocene Rudeis Shale. Burial history modelling indicates that oil generation from this unit began at around 3–4 Ma at vitrinite reflectance levels of Ro%=0.60–0.85. This implies extensive lateral and vertical migration has taken place for the generated oil to reach the surface. Alternatively, the seepage oils may be sourced by leakage from preexisting accumulations. 相似文献
90.
World Wide Web (WWW)-based electronic commerce has emerged as a mean to conduct business transactions that were previously
handled through traditional interorganizational systems, phone, fax, on-site visits, or mail. Today, electronic procurement
(e-procurement) accounts for most of the volume and value of the business transactions conducted over the Internet. As of
yet, however, little or no research has assessed the functional and non-functional requirements sought for the WWW-based systems
used to support the procurement process. This paper, presents findings of a survey of 133 corporate buyers from about 130
companies on the use of readily available web-based systems for business-to-business transactions and the requirements perceived
to be critical to the effective support of supply chain operations. 相似文献