全文获取类型
收费全文 | 354篇 |
免费 | 35篇 |
国内免费 | 143篇 |
专业分类
电工技术 | 252篇 |
综合类 | 14篇 |
化学工业 | 6篇 |
金属工艺 | 6篇 |
机械仪表 | 21篇 |
建筑科学 | 24篇 |
矿业工程 | 5篇 |
能源动力 | 28篇 |
轻工业 | 7篇 |
水利工程 | 4篇 |
石油天然气 | 3篇 |
无线电 | 22篇 |
一般工业技术 | 9篇 |
冶金工业 | 37篇 |
自动化技术 | 94篇 |
出版年
2024年 | 1篇 |
2022年 | 4篇 |
2021年 | 4篇 |
2020年 | 4篇 |
2019年 | 7篇 |
2018年 | 5篇 |
2017年 | 9篇 |
2016年 | 7篇 |
2015年 | 9篇 |
2014年 | 21篇 |
2013年 | 17篇 |
2012年 | 32篇 |
2011年 | 34篇 |
2010年 | 29篇 |
2009年 | 42篇 |
2008年 | 38篇 |
2007年 | 56篇 |
2006年 | 51篇 |
2005年 | 62篇 |
2004年 | 33篇 |
2003年 | 9篇 |
2002年 | 18篇 |
2001年 | 13篇 |
2000年 | 6篇 |
1999年 | 8篇 |
1998年 | 2篇 |
1997年 | 4篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1989年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
排序方式: 共有532条查询结果,搜索用时 46 毫秒
111.
Distributed shared Memory(DSM) systems have gained popular acceptance by combining the scalability and low cost of distributed system with the ease of use of single address space.Many new hardware DSM and software DSM systems have been proposed in recent years.In general,benchmarking is widely used to demonstrate the performance advantages of new systems.Howerver,the common method used to summarize the measured results is the arithmetic mean of ratios,which is incorrect in some cases.Furthermore,many published papers list a lot of data only,and do not summarize them effectively,which confuse users greatly.In fact,many users want to get a single number as conclusion,which is not provided in old summarizing techniques.Therefore,a new data-summarizing technique based on confidence interval is proposed in this paper.The new technique includes two data-summarizing methods:(1) paried confidence interval method;(2) unpaired confidence interval method.With this new technique,it is concluded that at some confidence one system is better than others.Four examples are shown to demonstrate the advantages of this new technique.Furthermore,with the help of confidence level,it is proposed to standardize the benchmaks used for evaluating DSM systems so that a convincing result can be got,In addition,the new summarizing technique fits not only for evaluating DSM systems,but also for evaluating other systems,such as memory system and communication systems. 相似文献
112.
In this paper we propose a mechanism that provides distributed shared memory (DSM) systems with a flexible sharing granularity. The size of the shared memory units is dynamically determined by the system during runtime. This size can range from that of a single variable up to the size of the entire shared memory space. During runtime, the DSM transparently adapts the granularity to the memory access pattern of the application in each phase of its execution. This adaptation, called ComposedView, provides efficient data sharing in software DSM while preserving sequential consistency. Neither complex code analysis nor annotation by the programmer or the compiler are required. Our experiments indicate a substantial performance boost (up to 80% speed‐up improvement) when running a large set of applications using our method, compared to running these benchmark applications with the best fixed granularity. Copyright © 2001 John Wiley & Sons, Ltd. 相似文献
113.
浅谈市场化条件下的电价改革 总被引:1,自引:0,他引:1
针对电力市场化改革中电价存在的问题 ,从制定电价原则、因素及方法入手 ,探讨合理制定电价的方法 相似文献
114.
The two books reviewed demonstrate convincingly that the etiology of mental disorders calls for the inclusion of multiple networks of causal factors in which psychological and sociocultural influences play a prominent part. Further, the books demonstrate that historic efforts to describe and construct categories that encompass these difficulties rest on false assumptions and are embedded in erroneous and distorting conceptual systems. Numerous enlightened alternatives to the current Diagnostic and Statistical Manual of Mental Disorders (DSM-IV; American Psychiatric Association, 1994) system are articulated in both books. Comments and extended suggestions are made on proposals the reviewer judges as providing especially incisive critiques or creative innovations. A framework for building a scientific foundation for integrating psychopathology and psychotherapy also is recommended. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
115.
116.
提出了一种改进的视差匹配算法.采用基于图像彩色分割的自适应权重方法,提高了DSM算法中像素点显著性估计的准确度,降低了视差匹配的误匹配率;并利用同一彩色区域的像素视差的相关性,缩小了视差匹配的搜索范围,减少了视差匹配的运算量.使用Middlebury网站的标准测试图像对文中的视差匹配算法进行了评估,实验结果表明,提出的视差匹配算法与DSM算法相比,降低了误匹配率,并且提高了运算速度. 相似文献
117.
移动对象索引技术是移动对象数据库这个新兴的热点领域中的关键技术之一.针对该技术处理数据的繁琐复杂特性,提出构建于DSM的移动对象索引方法 DSM_MSMON,在分布式系统中并行的管理移动对象的信息,支持更新和查询操作.DSM_MSMON统一了单机和多机的内存管理策略,解决了DSM系统中的数据定位、一致性维护、负载平衡和可扩充性等主要问题,有效地提高了移动对象索引的效率.文中给出DSM_MSMON的设计思想和模型,并分析了DSM_MSMON的关键技术和程序流程.实验结果表明,该方法要优于MSMON结构. 相似文献
118.
Time-of-use (TOU) pricing strategy is an important component of demand-side management (DSM), but the cost of supplying power during critical peak periods remains high under TOU prices. This affects power system reliability. In addition, TOU prices are usually applicable to medium- and long-term load control but cannot effectively regulate short-term loads. Therefore, this paper proposes an optimization method for TOU pricing and changes the electricity consumption patterns during the critical peak periods through a critical peak rebate (CPR). This reduces generation costs and improves power system reliability. An optimization model for peak-flat-valley (PFV) period partition is established based on fuzzy clustering and an enumeration iterative technique. A TOU pricing optimization model including grid-side and customer-side benefits is then proposed, and a simulated annealing particle swarm optimization (SAPSO) algorithm is used to solve the problem. Finally, a CPR decision model is developed to further reduce critical peak loads. The effectiveness of the proposed model and algorithm is illustrated through different case studies of the Roy Billinton Test System (RBTS). 相似文献
119.
120.
针对分布式共享存储(DSM)系统固定节点集合配置的限制,提出一种支持节点重新配置的DSM系统的实现方案。方案中,系统允许用户在执行DSM程序时改变节点集合。这种增加节点的能力使得用户可以进一步缩短DSM程序的执行时间,同时,通过动态删除系统中的节点,可以避免系统用户和计算机用户之间的资源竞争问题。为实现上述功能,系统采用了适宜工作量的重新分配和亲合页面的迁移等技术。该系统支持顺序一致性和释放一致性,能提供面向对象的并行程序环境。 相似文献