共查询到20条相似文献，搜索用时 593 毫秒
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学院走内涵发展道路,实施"强专业、强师资、强技能"三强战略目标,土木建筑工程系以特色打造强专业,以建立一支专兼结合的教学团队做强师资,以培养高技能人才为目标凸显强技能,提出了打造高职特色品牌专业的措施。 相似文献
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本文研究了Lp[a,b](p＜1)空间上可测函数列的几乎处处收敛、强收敛、弱收敛以及依测度收敛性的内在联系,给出命题和反例:强收敛一定弱收敛,强收敛必依测度收敛,强收敛不一定几乎处处收敛 相似文献
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研究了在一些试验点有重复观测时自变量非随机的半线性EV模型 .分别给出了线性参数和非线性部分的估计 ,并在适当的条件下证明了它们是强相合的 . 相似文献
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通过去除Strand空间中的强类型抽象假设 ,引入Strand模板的概念与一个入侵者的伪操作 ,进而利用认证测试方法 ,实现了对具有类型缺陷的认证协议的直接分析 . 相似文献
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姚木星 《内蒙古科技与经济》2013,(23):14-14,16
文章指出：在对强农惠农资金监督检查中发现,多头管理、投入分散、重复投资建设等问题较严重存在,制约了强农惠农资金作用的有效发挥,为此,笔者建议财政部门在加大对农业投入力度的同时,要切实做好“六个一”,以加强财政强农惠农资金监管,进一步提高财政资金效益。 相似文献
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中国大型企业是科技创新的主体,其空间布局具有一定的规律性。文章基于2005-2017中国500强制造业和服务业企业微观数据,采用重心模型、空间热点等分析方法,揭示中国500强制造业和服务业企业动态区位演化特征,并就其在地理空间分布格局上是否存在 “依赖”性进行分类检验,进而运用负二项回归模型分析服务业对制造业企业区位选择的影响。研究结果表明：(1)两类企业总部热点区和次热区呈现向南移动趋势,长三角是两类企业总部分布共同的热点区；(2)制造业和服务业企业重心逐步南移,两者重心距离逐渐减少,重心变化相关度增强；(3)制造业企业倾向布局在高端生产性服务业水平较高的区域,其中科技服务的影响显著增加,另外金融服务、交通运输服务也存在显著影响。 相似文献
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超短超强激光与物质的相互作用研究(强场物理)是目前世界上非常活跃的前沿研究领域之一。1999年物理研究所强场物理研究组正式成立。经过三年的艰苦奋斗,该组在强场物理研究方面取得了骄人的成绩,引起国际的广泛关注。系统地介绍了该组在强场物理研究方面所取得的重要进展及其在科研与应用中的意义。 相似文献
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在所谓的等离子加速器中，一束极强的激光脉冲波射入电离气体可以产生一个振荡起伏的强电场或者wakefield。该强电场能够在实验室长椅大小的空间内加速电子，使其能量达到使用传统加速器时需要几千米长才能达到的相同能级。直到最近，电场里的电子仅能被加速至一个不同的能量级，因而无法进行精确研究。现在， 相似文献
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肖良 《中国科学院研究生院学报》1999,(1)
讨论了复射影空间ＣＰｎ和四元数射影空间ＨＰｎ上的等参子流形．利用ＣＰｎ上等参子流形的分类定理［１０］,证明了ＣＰｎ上等参子流形的刚性定理．同时,还得到了四元数射影空间ＨＰｎ上等参子流形的例子． 相似文献
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Automatic word spacing in Korean remains a significant task in natural language processing owing to the extremely complex word spacing rules involved. Most previous models remove all spaces in input sentences and insert new spaces in the modified input sentences. If input sentences include only a small number of spacing errors, the previous models often return sentences with even more spacing errors than the input sentences because they remove the correct spaces that were typed intentionally by the users. To reduce this problem, we propose an automatic word spacing model based on a neural network that effectively uses word spacing information from input sentences. The proposed model comprises a space insertion layer and a spacing-error correction layer. Using an approach similar to previous models, the space insertion layer inserts word spaces into input sentences from which all spaces have been removed. The spacing error correction layer post-corrects the spacing errors of the space insertion model using word spacing typed by users. Because the two layers are tightly connected in the proposed model, the backpropagation flows are not blocked. As a result, the space insertion and error correction are performed simultaneously. In experiments, the proposed model outperformed all compared models on all measures on the same test data. In addition, it exhibited reliable performance (word-unit F1-measures of 94.17%～97.87%) regardless of how many word spacing errors were present in the input sentences. 相似文献
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Ignacy Duleba Wissem Khefifi Iwona Karcz-Duleba 《Journal of The Franklin Institute》2012,349(1):201-215
In this paper a layer, Lie algebraic method of motion planning for nonholonomic systems is presented. It plans locally a motion towards a goal by searching for optimal directions in equi-cost spaces. The spaces are easy to determine via exploiting Lie algebraic properties of vector fields that define the controlled system. The method was illustrated on the unicycle robot and the inverted pendulum. 相似文献
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讨论了概率赋范空间的局部有界性,阐明了局部有界的概率赋范空间与赋范空间的关系,给出了概率赋范空间可赋范化的充要条件,提出了广义概率赋范空间和最佳广义弱ｔ－模的概念,在这些新概率之下讨论了一些相应的问题。 相似文献
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大城市内部“生产-生活-生态空间”多尺度耦合协调度——以郑州市为例 总被引：1，自引：0，他引：1
城市“生产-生活-生态空间”的耦合协调发展是国土空间格局优化的重要基础。本文以郑州市为例,利用POI数据与随机森林模型精准识别2007年和2017年城市内部“生产-生活-生态空间”的分布特征,并运用定量模型多尺度分析“生产-生活-生态空间”的耦合协调度。结果表明：①整体结构特征上,郑州城市内部生态空间数量和所占比例均明显增加,生活空间所占比例相对稳定,生产空间的数量与所占比例变化波动较大。②辖区尺度上,郑州市“生产-生活-生态空间”耦合度不断提高,部分区域呈现出由拮抗时期向协调耦合时期的转化,协调度与耦合度存在一定的空间一致性。③街道尺度上,郑州市“生产-生活-生态空间”耦合度平均水平从磨合时期转为协调耦合时期,其空间差异明显减小,“生产-生活-生态空间”的协调度平均水平由中度失调转为基本协调,协调度水平明显提升。本文通过对城市内部“生产-生活-生态空间”耦合协调度的多尺度分析,旨在为城市层面不同尺度的国土空间规划提供理论参考。 相似文献
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Guan Tianru 《The Information Society》2020,36(2):59-70
AbstractThis study makes a systematic effort to connect digital communication research with comparative political analysis. It explores the concurrence of global influence and national resilience in digital spheres, integrating the homogenizing tendencies of networked connectedness and globalization with heterogeneous configurations of national political communication spaces, which are strongly influenced by enduring social contexts. Drawing on the process-oriented actor-connector-interlocutor model, this study uses three sets of indicators to classify national political communication spaces. It conceptualizes three distinctive types of political communication spaces – “symmetrical and fully-fledged,” “vigorous but censored,” and “infertile and unresponsive” – and identifies their characteristics, internal logics, and their linkages to other communication spaces. It offers a systematic and applicable framework that may be used in future studies on cross-national comparisons of political communication processes in digital spheres. 相似文献
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A second order difference operator with nonlocal boundary conditions is considered. The positivity of this operator in Banach spaces is proved. Moreover, the structure of the fractional spaces generated by this operator is investigated. Furthermore, the positivity of this operator in Hölder spaces is proved. 相似文献
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Christian Fuchs 《The Information Society》2013,29(3):179-196
This article argues that in informational capitalism, the notion of class should not be confined to capital as one class and wage labor as the other class. The notion of class needs to be expanded to include everybody who creates and recreates spaces of common experience, such as user-generated content on the Internet, through their practices. These spaces and experiences are appropriated and thereby expropriated and exploited by capital to accumulate capital. The rise of informational capitalism requires us to rethink the notion of class and to relate the class concept to knowledge labor. 相似文献
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本文利用高分辨率遥感影像Rapid Eye数据对北京绿色空间进行分类,并在此基础上分析城市建成区内绿色空间面积、覆盖率、人均绿色空间等指标的变化,多方面地反映了城市建成区内绿色空间的变化情况。研究结论如下:12000-2010年北京城市建成区绿色空间面积、绿色空间覆盖率和人均绿色空间面积总体上均在增加;22000-2010年人工林和草地占绿色空间总面积比例持续增加,农田所占比例持续下降;2000-2010年不同类型绿色空间之间发生转换,主要趋势是旱地转换为天然草丛/灌草丛、苗圃与果园;32000-2010年五环以内绿色空间面积和绿色空间覆盖率基本保持稳定,五环以外城市建成区绿色空间面积持续增加,绿色空间覆盖率先增加后减少。 相似文献
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In this paper, we present a well-defined general matrix framework for modelling Information Retrieval (IR). In this framework, collections, documents and queries correspond to matrix spaces. Retrieval aspects, such as content, structure and semantics, are expressed by matrices defined in these spaces and by matrix operations applied on them. The dualities of these spaces are identified through the application of frequency-based operations on the proposed matrices and through the investigation of the meaning of their eigenvectors. This allows term weighting concepts used for content-based retrieval, such as term frequency and inverse document frequency, to translate directly to concepts for structure-based retrieval. In addition, concepts such as pagerank, authorities and hubs, determined by exploiting the structural relationships between linked documents, can be defined with respect to the semantic relationships between terms. Moreover, this mathematical framework can be used to express classical and alternative evaluation measures, involving, for instance, the structure of documents, and to further explain and relate IR models and theory. The high level of reusability and abstraction of the framework leads to a logical layer for IR that makes system design and construction significantly more efficient, and thus, better and increasingly personalised systems can be built at lower costs. 相似文献