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41.
Mortensen Jesper Yu Insu Khanna Pankaj Tecchia Franco Spanlang Bernhard Marino Giuseppe Slater Mel 《Computer Graphics and Applications, IEEE》2008,28(6):56-64
Real-time global illumination in VR systems enhances scene realism by incorporating soft shadows, reflections of objects in the scene, and color bleeding. The Virtual Light Field (VLF) method enables real-time global illumination rendering in VR. The VLF has been integrated with the Extreme VR system for real-time GPU-based rendering in a Cave Automatic Virtual Environment. 相似文献
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Hybrid systems are heterogeneous systems characterised by the interaction of discrete and continuous dynamics. We present a trajectory-based algebraic model for describing hybrid systems; the trajectories used are closely related to streams. The algebra is based on left quantales and left semirings and provides a new application for these algebraic structures. We show that hybrid automata, which are probably the standard tool for describing hybrid systems, can conveniently be embedded into our algebra. Moreover we point out some important advantages of the algebraic approach. In particular, we show how to handle Zeno effects, which are excluded by most other authors. The development of the theory is illustrated by a running example and a larger case study. 相似文献
44.
Marco Bakera Tiziana Margaria Clemens D. Renner Bernhard Steffen 《Innovations in Systems and Software Engineering》2009,5(3):211-228
We show on a case study from an autonomous aerospace context how to apply a game-based model-checking approach as a powerful
technique for the verification, diagnosis, and adaptation of system behaviors based on temporal properties. This work is part
of our contribution within the SHADOWS project, where we provide a number of enabling technologies for model-driven self-healing.
We propose here to use GEAR, a game-based model checker, as a user-friendly tool that can offer automatic proofs of critical
properties of such systems. Although it is a model checker for the full modal μ-calculus, it also supports derived, more user-oriented logics. With GEAR, designers and engineers can interactively investigate
automatically generated winning strategies for the games, by this way exploring the connection between the property, the system,
and the proof.
This work has been partially supported by the European Union Specific Targeted Research Project SHADOWS (IST-2006-35157), exploring a Self-Healing Approach to Designing cOmplex softWare Systems. The project’s web page is at .
This article is an extended version of Renner et al. [18] presented at ISoLA 2007, Poitiers, December 2007. 相似文献
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47.
J. L. Tallon C. Bernhard Ch. Niedermayer J. Shimoyama S. Hahakura K. Yamaura Z. Hiroi M. Takano K. Kishio 《Journal of Low Temperature Physics》1996,105(5-6):1379-1384
We show from muon spin relaxation (SR) studies on mercury HTS superconductors that a 50-fold increase in irreversibility field obtained by partial substitution of Re for Hg is due to metallisation of the Hg/Re layer. Induced superconductivity on this metallic layer doubles the overall superfluid density. This suggests a new approach to the design of high performance HTS materials: metallising one of the non-CuO2 interlayers and thereby greatly enhancing the superconducting properties. 相似文献
48.
Georg Birkenheuer Andr�� Brinkmann Mikael H?gqvist Alexander Papaspyrou Bernhard Schott Dietmar Sommerfeld Wolfgang Ziegler 《Journal of Grid Computing》2011,9(3):355-377
Infrastructure federation is becoming an increasingly important issue for modern Distributed Computing Infrastructures (DCIs):
Dynamic elasticity of quasi-static Grid environments, incorporation of special-purpose resources into commoditized Cloud infrastructures,
cross-community collaboration for increasingly diverging areas of modern e-Science, and Cloud Bursting pose major challenges
on the technical level for many resource and middleware providers. Especially with respect to increasing costs of operating
data centers, the intelligent yet automated and secure sharing of resources is a key factor for success. With the D-Grid Scheduler
Interoperability (DGSI) project within the German D-Grid Initiative, we provide a strategic technology for the automatically
negotiated, SLA-secured, dynamically provisioned federation of resources and services for Grid-and Cloud-type infrastructures.
This goal is achieved by complementing current DCI schedulers with the ability to federate infrastructure for the temporary
leasing of resources and rechanneling of workloads. In this work, we describe the overall architecture and SLA-secured negotiation
protocols within DGSI and depict an advanced mechanism for resource delegation through means of dynamically provisioned, virtualized
middleware. Through this methodology, we provide the technological foundation for intelligent capacity planning and workload
management in a cross-infrastructure fashion. 相似文献
49.
Current publicly available computer programs calculate the spectrum and couplings of the minimal supersymmetric standard model under the assumption of R-parity conservation. Here, we describe an extension to the SOFTSUSY program which includes R-parity violating effects. The user provides a theoretical boundary condition upon the high-scale supersymmetry breaking R-parity violating couplings. Successful radiative electroweak symmetry breaking, electroweak and CKM matrix data are used as weak-scale boundary conditions. The renormalisation group equations are solved numerically between the weak scale and a high energy scale using a nested iterative algorithm. This paper serves as a manual to the R-parity violating mode of the program, detailing the approximations and conventions used.
Program summary
Program title:SOFTSUSY v3.0Catalogue identifier: ADPM_v2_0Program summary URL:http://cpc.cs.qub.ac.uk/summaries/ADPM_v2_0.htmlProgram obtainable from: CPC Program Library, Queen's University, Belfast, N. IrelandLicensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.htmlNo. of lines in distributed program, including test data, etc.: 75 927No. of bytes in distributed program, including test data, etc.: 570 916Distribution format: tar.gzProgramming language: C++, FortranComputer: Personal computerOperating system: Tested on Linux 4.xWord size: 32 bitsClassification: 11.6Catalogue identifier of previous version: ADPM_v1_0Journal reference of previous version: Comput. Phys. Comm. 143 (2002) 305Does the new version supersede the previous version?: YesNature of problem: Calculating supersymmetric particle spectrum and mixing parameters in the R-parity violating minimal supersymmetric standard model. The solution to the renormalisation group equations must be consistent with a high-scale boundary condition on supersymmetry breaking parameters and Rp parameters, as well as a weak-scale boundary condition on gauge couplings, Yukawa couplings and the Higgs potential parameters.Solution method: Nested iterative algorithmReasons for new version: This is an extension to the SOFTSUSY program which includes R-parity violating effects. The user provides a theoretical boundary condition upon the high-scale supersymmetry breaking R-parity violating couplings. Successful radiative electroweak symmetry breaking, electroweak and CKM matrix data are used as weak-scale boundary conditions. The renormalisation group equations are solved numerically between the weak scale and a high energy scale using a nested iterative algorithm. The paper serves as a manual to the R-parity violating mode of the program, detailing the approximations and conventions used.Restrictions:SOFTSUSY3.0 will provide a solution only in the perturbative regime and it assumes that all couplings of the MSSM are real (i.e. CP-conserving). The iterative SOFTSUSY algorithm will not converge if parameters are too close to a boundary of successful electroweak symmetry breaking, but a warning flag will alert the user to this fact.Running time: A few seconds per parameter point. 相似文献50.
Bernhard Burgermeister Martin Arnold Alexander Eichberger 《Multibody System Dynamics》2011,26(1):1-14
The rapidly increasing complexity of multi-body system models in applications like vehicle dynamics, robotics and bio-mechanics
requires qualitative new solution methods to slash computing times for the dynamical simulation. 相似文献