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481.
In their comment on K. Rothermund and D. Wentura (see record 2004-14313-001), A. G. Greenwald, B. A. Nosek, M. R. Banaji, and K. C. Klauer (see record 2005-09704-008) agreed that salience asymmetries can be a source of Implicit Association Test (IAT) effects. The authors applaud this conclusion but point to problems with the other points that Greenwald et al. made. The authors have difficulties understanding the nominal feature account that Greenwald et al. put forward and have doubts about the usefulness of their broad conception of the concept association. The authors also argue that existing evidence concerning the construct validity of the IAT does not allow one to discriminate between the association and the salience accounts. In addition, the new studies that were presented by Greenwald et al. do not provide insights into what the IAT measures because they are either irrelevant for a decision between the different accounts or contain methodological problems that prevent a meaningful interpretation in terms of the models. (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   
482.
We studied the role of implicit attitudes on road safety behaviors. We also explored the methodological benefits of using implicit measures to complement conventional self-reporting instruments. The results suggest that: (a) implicit attitudes are capable of predicting observed differences in the use of protective devices (helmet use); (b) implicit attitudes correlate with the emotional component of the explicit attitudes (e.g., perception of comfort–discomfort), but appear to be independent of the more cognitive components (e.g., perceived benefits); (c) the emotional component of the explicit attitudes appears to be the major predictor of behavior; and (d) implicit measures seem to be more robust against social desirability biases, while explicit measure are more sensitive to such bias. We conclude that indirect and automatic measures serve as an important complement to conventional direct measures (self-reports) because they provide information on psychological processes that are qualitatively different (implicit) and can also be more robust when it comes to response bias.  相似文献   
483.
484.
知识管理中几个关键问题的研究   总被引:3,自引:0,他引:3  
崔海涛 《计算机仿真》2005,22(4):169-171
知识经济的发展给传统的工业经济带来了一系列新的思维和管理方法。知识已逐渐成为经济发展的核心要素。“知识管理”是近几年出现的一个重要的词汇,目前还处在探讨发展阶段。该文旨在通过其中的几个关键问题如知识的动态特征,隐性知识与显性知识等来阐述知识管理的内涵,以加深对知识管理的理解与共识。  相似文献   
485.
We present in this paper an algorithm for meshing implicit surfaces based on the Delaunay triangulation of a point-set adaptively sampled on an implicit surface. To improve the quality of the resulting triangular mesh, we use at each iteration a mesh optimization algorithm with the following objectives: optimizing the connectivity, retrieving the sharp features, regularizing the triangles shapes and minimizing the approximation error. Then, we extend this algorithm in order to handle functionally defined heterogeneous object surfaces, while maintaining a good quality for the triangles’ shapes and the mesh features (geometrical sharp features and boundaries between different materials).  相似文献   
486.
刘福才  贺浩博 《计算机仿真》2007,24(6):301-303,333
基于CARIMA模型提出了一种约束输入输出的隐式广义预测控制算法.针对广义预测控制问题,在整个预测时域和控制时域,对输入幅值,输入增量和输出幅值施加了约束,引入了输入输出柔化系数,从而简化了目标函数,减小了计算量,该算法不必求解逆矩阵;并采用了隐式广义预测自校正控制算法,利用并列预测控制器间的特点,直接辨识输出预测器中的参数,从而避免了在线求解Diophantine方程.该算法占用内存小,计算速度快,仿真结果表明该算法具有良好的控制性能.  相似文献   
487.
488.
隐函数的布尔操作   总被引:4,自引:0,他引:4  
若隐函数曲面由等式f(x,y,z)=0定义,则其相对应的实体满足不等式f(x,y,z)≥0,对这种实体的并、交、差等布尔操作采用R-函数来实现.特别地,由Metaball定义的隐函数,除具有隐函数的一般性质外,还可用于实体造型中的过渡及变形控制等.证明了用R-函数实现实体的布尔操作的可行性及Metaball模型在几何造型中能光滑过渡等性质.  相似文献   
489.
王禹  袁乃昌 《电子与信息学报》2005,27(10):1677-1680
基于交替方向隐式(ADI)技术的时域有限差分法(FDTD)是一种非条件稳定的计算方法,该方法的时间步长不受Courant稳定条件限制,而是由数值色散误差决定。与传统的FDTD相比, ADI-FDTD增大了时间步长, 从而缩短了总的计算时间。该文采用递归卷积(RC)方法导出了二维情况下色散媒质中ADI-FDTD的完全匹配层(PML)公式。应用推导公式计算了色散土壤中目标的散射,并与色散媒质中FDTD结果对比,在大量减少计算时间的情况下,两者结果符合较好。  相似文献   
490.
Neural implicit surfaces have emerged as an effective, learnable representation for shapes of arbitrary topology. However, representing open surfaces remains a challenge. Different methods, such as unsigned distance fields (UDF), have been proposed to tackle this issue, but a general solution remains elusive. The generalized winding number (GWN), which is often used to distinguish interior points from exterior points of 3D shapes, is arguably the most promising approach. The GWN changes smoothly in regions where there is a hole in the surface, but it is discontinuous at points on the surface. Effectively, this means that it can be used in lieu of an implicit surface representation while providing information about holes, but, unfortunately, it does not provide information about the distance to the surface necessary for e.g. ray tracing, and special care must be taken when implementing surface reconstruction. Therefore, we introduce the semi-signed distance field (SSDF) representation which comprises both the GWN and the surface distance. We compare the GWN and SSDF representations for the applications of surface reconstruction, interpolation, reconstruction from partial data, and latent vector analysis using two very different data sets. We find that both the GWN and SSDF are well suited for neural representation of open surfaces.  相似文献   
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