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排序方式: 共有131条查询结果,搜索用时 15 毫秒
1.
奉国和 《现代图书情报技术》2006,1(5):74-76
运用有限状态图设计图书馆语音自动应答系统, 以弥补图书馆现有系统的不足,实现以读者为中心的新型信息服务模式,使图书馆的信息服务在广度、深度、效率等方面都有较大的提高。 相似文献
2.
Sulaiman M. Al-Balushi 《International Journal of Science Education》2013,35(3):460-489
The current study compared different learners’ static and dynamic mental images of unseen scientific species and processes in relation to their spatial ability. Learners were classified into verbal, visual and schematic. Dynamic images were classified into: appearing/disappearing, linear-movement, and rotation. Two types of scientific entities and their related processes were investigated: astronomical and microscopic. The sample included 79 female students from Grades 9 and 10. For the purpose of the study, three instruments were used. The Mental Images by Guided Imagery instrument was designed to investigate participants' visualization of static and dynamic mental images. The Water-Level Task was adopted to estimate participants' spatial ability. The Learning Styles Inventory was used to classify participants into verbal, visual and schematic learners. The research findings suggest that schematic learners outperformed verbal and visual learners in their spatial ability. They also outperformed them in their vividness of microscopic images; both micro-static and micro-dynamic images; especially in the case of appearing/disappearing images. The differences were not significant in the case of astronomical images. The results also indicate that appearing/disappearing images received the least vividness scores for all three types of learners. 相似文献
3.
静止式进相器是专为大中型绕线式电机节能降耗设计的无功功率就地补偿装置。现有静止式进相器仅停留在单台电动机和单台静止式进相器的配套使用上,缺乏监控系统、历史数据无法保存。详细介绍了基于无线通信的静止式进相器系统设计,系统由静止式进相器控制子系统和主控子系统组成,使用无线通信模块实现静止式进相器和主控机的通信。主控子系统设计中,采用预约ALOHA实现主控子系统的多址通信。该系统经过实验和现场调试,其结果表明:静止式进相器补偿效果明显,实现系统无线通信功能,满足无线监测的设计要求。 相似文献
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以古地名、考古材料及古俗遗存为依据,考证湖南靖州与毗邻会同县一道同属于神农创易的核心区域;靖州飞山是神农炎帝“仰观天象”处;首次发现“四卦”体系证据,推论靖州“飞山四卦”为先天八卦与连山易之源。 相似文献
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传统的尸检文书包含有尸图,用于记录尸体的损伤情况。然而,当命案调查中遇到白骨化尸体时,尸图并不适合表征骨骼的情况。清代刑部为解决该问题,于1770年绘制了检骨图。然而,该图绘制了一些多余的骨骼。本文描述了其中的一些骈枝骨骼的特征,并分析了导致它们出现的文献上的一些原因。本文认为,《律例馆校正洗冤录》中一些骨骼的命名方式,骨骼知识的形成方式和该文献的汇编性质,都是导致骈枝骨骼出现的原因之一。 相似文献
8.
Modelling and analysis of a basilica under earthquake loading 总被引:1,自引:0,他引:1
In this paper a basilica-type church is analysed in order to assess its structural behaviour and seismic vulnerability. For this purpose, an effective two-step procedure has been used, consisting of: (a) 3D static and dynamic linear analyses of the structural complex, and (b) 2D nonlinear push-over analysis of the single macro-elements. The results obtained through push-over analyses have been compared to the collapse loads derived from limit analysis, proving the ability of finite element (F.E.) nonlinear model to provide reliable simulation of the actual response of masonry elements. Then, the strength demand on each single structural macro-elements, resulting from the 3D linear analyses, has been compared to the macro-element ultimate strength capacity. The comparison demand vs. capacity has been carried out for all transversal and longitudinal macro-elements of the church, allowing a direct, though approximate, assessment of the seismic safety level of the church. The comparison demand vs. capacity confirms the susceptibility of this type of buildings to extensive damage and possibly to collapse, as frequently observed. The insertion of rigid diaphragms, which represents a widely used retrofit technique, has also been investigated; such intervention triggers concentration of strength demand in the stiffest macro-elements, so that the seismic capacity of the building is not necessarily increased. 相似文献
9.
数理经济学主体框架分为静态、比较静态和动态三大部分.每一部分的侧重点各有不同,静态是求解模型均衡解;比较静态关注模型均衡解如何随系统参数扰动而变动;动态侧重均衡解是否能达到及如何达到.文章以线性局部市场模型为例,分别从静态、比较静态和动态三方面剖析了数理经济分析的整体框架与思路. 相似文献
10.
Andreas Veglis 《Publishing Research Quarterly》2008,24(2):111-123
This paper attempts a direct comparison of the available alternative channels that can be employed in a cross media publishing
scheme. More precisely it examines the content, the publishing speed, and the rhythm of the publishing channels. Interesting
conclusions are drawn concerning the characteristics of each channel. A new publishing channel is proposed in order to allow
newspapers to directly compete with radio and TV channels. 相似文献