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101.
基于3dsmax的船舶三维运动仿真 总被引:4,自引:0,他引:4
该文尝试使用3维软件3dsmax作为仿真平台,调用其下的reactor动力学模块,对船舶模型在水中的交互运动进行了预报。通过两个仿真试验,介绍了这种虚拟脱实技术的工作原理,展示了其快速实时,交互方便的优势。一个试验是通过对帆船在风作用下的仿真,得到了位移响应曲线和运动动画;另一个试验是通过对船舶破舱进水倾覆过程的模拟,得到了各个时刻船的浮态。 相似文献
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3D graphic rendering in mobile application programs is becoming increasingly popular with rapid advances in mobile device technology. Current 3D graphic rendering engines for mobile devices do not provide triangulation capabilities for surfaces; therefore, mobile 3D graphic applications have been dealing only with pre-tessellated geometric data. Since triangulation is comparatively expensive in terms of computation, real-time tessellation cannot be easily implemented on mobile devices with limited resources. No research has yet been reported on real-time triangulation on mobile devices.In this paper, we propose a real-time triangulation algorithm for visualization on mobile devices based on sequential constrained Delaunay triangulation. We apply a compact data structure and a sequential triangulation process for visualization of CAD data on mobile devices. In order to achieve a high performance and compact implementation of the triangulation, the nature of the CAD data is fully considered in the computational process. This paper also presents a prototype implementation for a mobile 3D CAD viewer running on a handheld Personal Digital Assistant (PDA). 相似文献
104.
The ability to analyze the effectiveness of agent reward structures is critical to the successful design of multiagent learning
algorithms. Though final system performance is the best indicator of the suitability of a given reward structure, it is often
preferable to analyze the reward properties that lead to good system behavior (i.e., properties promoting coordination among
the agents and providing agents with strong signal to noise ratios). This step is particularly helpful in continuous, dynamic,
stochastic domains ill-suited to simple table backup schemes commonly used in TD(λ)/Q-learning where the effectiveness of
the reward structure is difficult to distinguish from the effectiveness of the chosen learning algorithm. In this paper, we
present a new reward evaluation method that provides a visualization of the tradeoff between the level of coordination among
the agents and the difficulty of the learning problem each agent faces. This method is independent of the learning algorithm
and is only a function of the problem domain and the agents’ reward structure. We use this reward property visualization method
to determine an effective reward without performing extensive simulations. We then test this method in both a static and a
dynamic multi-rover learning domain where the agents have continuous state spaces and take noisy actions (e.g., the agents’
movement decisions are not always carried out properly). Our results show that in the more difficult dynamic domain, the reward
efficiency visualization method provides a two order of magnitude speedup in selecting good rewards, compared to running a
full simulation. In addition, this method facilitates the design and analysis of new rewards tailored to the observational
limitations of the domain, providing rewards that combine the best properties of traditional rewards. 相似文献
105.
基于MatLab环境的高等数学可视化 总被引:3,自引:0,他引:3
将高等数学与计算机(MatLab工具)结合起来,利用现代科技手段,动态演示高等数学的抽象问题,使高等数学理论、概念不再抽象难懂,提高学生运用先进的数学工具学习高等数学的能力,且有利于培养学生学习数学的兴趣和数学应用意识。 相似文献
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108.
多学科油藏研究一体化平台是基于Windows操作系统、以局域网络为传输通道、以开发数据库和精细地质研究成果为基础的多学科工作平台。本文扼要介绍了平台的研发背景、总体思路、开发环境,详细描述了数据共享、精细地质建模、精细油藏数值模拟及三维可视化的功能设计与实现方法,最后客观评价了平台的优势与不足。 相似文献
109.
Bin Gao Tammo S. Steenhuis Yunati Zevi J.-Yves Parlange Robert N. Carter Thomas A. Trabold 《Journal of power sources》2009,190(2):95
Modeling two-phase flow in proton exchange membrane (PEM) fuel cells is hampered by a lack of conceptual understanding of flow patterns in the gas diffusion layer (GDL). In this paper, pore-scale visualizations of water in different types of GDLs were used to improve current understanding of flow and transport phenomena in PEM fuel cells. Confocal microscopy was used to capture the real-time transport of water, and pressure micro-transducers were installed to measure water breakthrough pressures. Three types of fuel cell GDLs were examined: TO series (Toray Corp., Tokyo, Japan), SGL series (SGL Carbon Group, Wiesbaden, Germany), and MRC series (Mitsubishi Rayon Corp., Otake City, Japan). The visualizations and pressure measurements revealed that despite difference in “pore” structures in the three types of GDLs, water followed distinct flow paths spanning several pores with characteristics similar to the “column flow” phenomena observed previously in hydrophobic or coarse-grained hydrophilic soils. The results obtained from this study can aid in the construction of theories and models for optimizing water management in fuel cells. 相似文献
110.
为了实现多种异构数据库之间的互操作,提供一个可视环境下进行异种数据库互操作的软件,本文选择了Visual Basic 6.0作为开发环境,利用VB提供的一些实用工具,开发了一个小型的可视化数据库集成器软件。 相似文献