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1.
Flow shop rescheduling problem under rush orders 总被引：1，自引：0，他引：1
INTRODUCTION Rescheduling problem in manufacturing system is considered as a particularly hard combinatorial optimization problem,closely related with uncer-tainty caused by exterior business environment and interior production conditions.Production resched-uling is a common practice in manufacturing compa-nies all over the world.Four sources of production disturbances have been identified:(1)incorrect work;(2)machine breakdowns;(3)rework due to quality problem;and(4)rush orders(Rangsarit… 相似文献
2.
The effects of photoperiod and light intensity on flowering in Mat Rush cv. Gangshan 3 were studied. The results showed that
treatments with longer day length stimulated flowering significantly and increased stem flowering percentage (SFP). Plants
treated with low light intensity at early stage had substantially reduced florets per cyme, SFP, tillers per plant and stem
length. At middle and late stage, low light intensity significantly reduced SFP. The principal climatic factors affecting
SFP were as follows: mean temperatures (MT) of the third ten-day period (TDP) in December and of the second TDP in February,
actual sunlight hours (SH) of the third TDP in February and precipitation of the third TDP in March. A nonlinear simulation
model for SFP was established with experimental results and corresponding climatic data (see Eq. (2)).
Simulation by the above equation yielded values the same as those observed from 1992 to 2000, indicating its accuracy in describing
the relationship between flowering and light and temperature conditions. The interaction between vernalization and SH is also
discussed in this paper.
Project (No. 981105) supported by the Ningbo City Science Foundation, China 相似文献
3.
"择校热"现象是目前遍布全国各地,并且"愈演愈烈",而在"择校热"背后所反映出的是我国教育发展过程中"教育不公平"的问题,其核心在于"教育资源分配的不平衡"。因此本文意在从教育资源分配与"教育公平"的关系来分析"择校热"现象背后的"教育不公平"现象的本质,并提出为树立"教育公平"旗帜的一些针对性建议与政策导向。 相似文献
4.
从《匆匆》英译看英汉衔接手段差异及处理方式 总被引：1，自引：0，他引：1
衔接是语篇的基本特征,英汉语篇在具体使用特定衔接方式的倾向性和频率上表现出了较大差异。从散文《匆匆》及其两英译文中的语篇衔接手段的对比发现,汉英翻译中对衔接手段的处理有保留、转换、增补、省略等四种方式;译者需根据需要选择恰当的方式。 相似文献
5.
Sarah Elizabeth Naramore 《Endeavour》2021,45(1-2):100765
Between 1809 and 1813 leading American physician Benjamin Rush (1745–1813) devoted a significant portion of his time to the production of “American Editions” of four British and colonial medical texts by Thomas Sydenham (1624–1689), Sir John Pringle (1707–1782), William Hillary (1697–1763), and George Cleghorn (1716–1789). This occurred during a period where Rush might have written a textbook detailing his preferred medical system for students outright. Instead, he opted for a different form of knowledge production and proliferation that focused on creating fictive conversations and encouraging critical reading rather than rote memorization. He dedicated these heavily annotated documents to the medical students of the United States of America and set them up as a pedagogical tool. Analysis of these texts helps uncover the reading practices of Rush and the manner in which he expected Americans to mediate their usage of foreign texts and theories after the American Revolution. 相似文献
6.
薛瑞生 《南京师范大学文学院学报》2013,(2):113-118
进入新世纪以来,柳永研究呈现出方兴未艾之势,学术界与文化界都兴起了一股"柳永热",自然也出现了不同观点的论争。从学术角度考察,在这股"柳永热"的背后,却也存在着潜伏的危机,这就是理论研究与实证研究的脱节与不平衡。在我看来,这种脱节与不平衡,必然导致柳永的被理解与被误解,这就是本文要论述的中心议题。 相似文献
7.
微课的六点质疑及回应 总被引：1，自引：0，他引：1
目前,微课已成为我国教育信息化发展的新热点。微课的出现,在教育领域掀起了轩然大波,也引发了一波波的“微课热潮”。归纳起来,人们对微课的质疑主要有六点：一是认为微课热是“短时炒作”,二是认为微课是“新瓶”装“旧酒”,三是认为微课是导致知识碎片化的“元凶”,四是认为微课没有技术含量,五是认为微课可能将传统的课堂实录完全淘汰出局,六是认为微课类型繁杂,缺少统一的评判标准、创作模式和制作工具。人们之所以提出这些质疑,归根到底源于人们对微课产生的时代背景、现实需求、核心本质、优势短板、教育价值、应用前景、发展趋势、创作方法等相关问题缺乏必要的理性思考和实践探索。在未来,微课研究者需要共同联手破解的难题包括微课的设计原则与策略、评价标准、支持与变革教与学的方式、从微课走向微课程、一体化微课程开发平台研制等。只有解决了这些难题,才能引领微课健康、快速发展。 相似文献
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9.
谭天 《首都师范大学学报(社会科学版)》2004,3(Z1):104-110
淘金热是阿拉斯加 (Alaska)城市兴起的最主要的原因。第一批欧洲人到达阿拉斯加前 ,此地的原住民仍然处于原始社会阶段。 1 741年 ,俄国人来到了这片土地。他们建立起星星点点的狩猎站和贸易站。 1 867年 ,美国从俄国手中购买了阿拉斯加。随后的几年间 ,这里并没有出现多少变化。不过 ,淘金热给阿拉斯加的命运带来了转机。 1 880年人们在朱诺(Juneau)发现了黄金 ,从而揭开了淘金热的序幕。分布广、产量大的金矿给这里带来了勃勃生机。城市在一夜之间兴起了。总之 ,淘金热点燃了阿拉斯加现代文明的火种。 相似文献
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