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201.
The present study investigates the channel flow of a third order fluid. The fluid is electrically conducting in the presence of a magnetic field applied transversely to the porous walls of a channel. Expression for velocity is developed by an analytic method, namely the homotopy analysis method (HAM). Convergence of the obtained solution is properly checked. The feature of the analytic solution as function of the physical parameters of the problem are discussed with the help of graphs. It is observed that unlike the flow of second grade fluid, the obtained solution for a third order fluid is non-similar. Also, the behavior of Hartmann number on the velocity is different to that of the Reynold's number. 相似文献
202.
T. Hayat M. Sajid M. Ayub 《Communications in Nonlinear Science & Numerical Simulation》2007,12(8):1481-1487
The problem of generalized Couette flow is considered in this paper. Using homotopy analysis method (HAM) the series solution is developed and its convergence is discussed. Finally, the results are presented graphically and the effects of emerging parameters are analyzed. 相似文献
203.
Xiaohe Tian Sajid Hussain Cesare dePace Lorena Ruiz‐Prez Giuseppe Battaglia 《化学:亚洲杂志》2019,14(4):509-526
Zinc is a biocompatible element that exists as the second most abundant transition metal ion and an indispensable trace element in the human body. Compared to traditional metal‐organic complexes systems, d10 metal ZnII complexes not only exhibit a large Stokes shift and good photon stability but also possess strong emission and low cytotoxicity with a relatively small molecular weight. The use of ZnII complexes has emerged in the last decade as a versatile and convenient tool for numerous biological applications, including bioimaging, molecular and protein recognition, as well as photodynamic therapy. Herein, we review recent developments involving ZnII metal complexes applied as specific subcellular compartment imaging probes and their correlated utilizations. 相似文献
204.
Sajid Muhammad Usman Ali Hafiz Muhammad Sufyan Abu Rashid Danial Zahid Saad Ullah Rehman Wajih Ur 《Journal of Thermal Analysis and Calorimetry》2019,137(4):1279-1294
Journal of Thermal Analysis and Calorimetry - The present study comprises experimental investigation on heat transfer and hydrodynamic characteristics of TiO2 nanofluid as coolant in wavy channel... 相似文献
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Muhammad Sajid Maria Ishaque Muhammad Imran Niaz Ahmad Niaz Fayyaz Hussain Umbreen Rasheed R. M. Arif Khalil Syed Mansoor Ali Sardar Sikandar Hayat Muhammad Shoaib 《International journal of quantum chemistry》2024,124(1):e27281
The Density Functional Theory (DFT) calculations interpreted the electronic and optical alteration of Ruddlesden–Popper layered perovskite (Sr3Zr2O7) with substitutional doping of Ti-, Hf-, and Ti+Hf- atoms in place of Zr-atoms by generating the oxygen vacancies (Vos) defect. Formation energy and phonon calculations confirmed that the studied composites are dynamically stable, and the lattice parameters of the considered RP perovskite with and without vacancy defects did not change by introducing a small concentration of doped elements. The doped Sr3Zr2O7 composites show band gap tuning in the presence and absence of Vos, which was 3.31 eV in pristine form, and localized states near the Fermi line due to dopant and Vos, which confirmed the quantized conductance in all composites and may be beneficial for overcoming uniformity issues in nonvolatile memory devices. Isosurface charge density calculations also verified this result by depicting the physical mechanism of charge accumulation and depletion in the layers of RP perovskite in the vicinity of defects, resulting in residual conducting filaments guiding its growth and leading it to a low resistance state. The photosensitive response of this layered perovskite also confirmed its use for memory storage applications. The valuable outcomes of this study predicted that Sr3Zr2O7+Ti+Hf is the most stable and, hence, the best composite for nonvolatile RRAM device applications. 相似文献
208.
Chamakura K Perez-Ballestero R Luo Z Bashir S Liu J 《Colloids and surfaces. B, Biointerfaces》2011,84(1):88-96
Engineered nanomaterials display significant advantages due to their unique nanostructure, along with their tuneable properties for the designed application. Silver nanoparticles (Ag-NPs) have drawn attention due to their use as potent bactericidal agents and were characterized in this research to provide an understanding of the interaction between nanomaterials and bacteria. This work presents the bactericidal performance of Ag-NPs using Escherichia coli (E. coli) as a model microorganism. Several state-of-the-art techniques, such as high-angle annular dark-field detector in scanning transmission electron microscopy, and energy filtered imaging in electron energy loss spectroscopy, were employed to obtain nanostructural and elemental information. The bactericidal activities of Ag-NPs were then compared with two commonly used disinfectants, sodium hypochlorite (NaClO) and phenol (C(6)H(5)OH). These two chemical disinfectants exhibited rapid bactericidal activity, showing a minimal bactericidal concentration (MBC) of 16 parts-per-million (ppm) and 16 part-per-thousand (ppth), respectively for NaClO and C(6)H(5)OH within about 10 min. In contrast, Ag-NPs exhibit slow but long-term bactericidal effect demonstrating MBCs of 0.6 parts-per-million (ppm) within 6h when used as disinfectant. An advantage using Ag-NPs to inactivate E coli at low dosages is negligible environmental waste or hazardous by-products. The results showed that Ag-NPs caused bacterial inactivation by a mechanism involving several steps, including cell wall and cytoplasmic membrane damage. 相似文献
209.
T. Hayat M. Mustafa M. Sajid 《Numerical Methods for Partial Differential Equations》2011,27(4):915-936
This attempt theoratically examines the mass transfer analysis of the boundary layer flow caused by a stretching surface. Analytic solutions are derived with the Homptopy analysis method (HAM). Numerical values of skin friction coefficients and the surface mass transfer are reported. The effectiveness of this method is explicitly illustrated by discussing the convergence of the obtained series solutions. Velocity and gradient of mass transfer are shown graphically and discussed. © 2010 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq 27: 915–936, 2011 相似文献
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