国家高新区是地区“稳外资”的有效载体吗——来自我国276座城市的证据     

万源星  郑秀田林霞 《科研管理》2022,43(9):1-9

以相继设立的国家高新区为实验场景,利用1994—2017年中国276座地级市数据,通过多期倍差模型检验国家高新区对地区外商直接投资的影响。研究表明：（1）国家高新区促进地区吸引FDI,尤其东部地区,以及自然资源依赖度低、市场及人力资源优越的地区;（2）上述政策效果通过提高地区产业集聚、科技创新及基础设施水平而实现的。本文为国家高新区政策评价不一的结论提供微观证据,并对深化市场对外开放的系列改革提供建议。  相似文献   

Dynamic commonsense knowledge fused method for Chinese implicit sentiment analysis     

《Information processing & management》2022,59(3):102934

Compared with explicit sentiment analysis that attracts considerable attention, implicit sentiment analysis is a more difficult task due to the lack of sentimental words. The abundant information in an external sentimental knowledge base can play a significant complementary and expansion role. In this paper, a sentimental commonsense knowledge graph embedded multi-polarity orthogonal attention model is proposed to learn the implication of the implicit sentiment. We analyzed the effectiveness of different knowledge relations in the ConceptNet knowledge base in detail, and proposed a matching and filtering method to distill useful knowledge tuples for implicit sentiment analysis automatically. By introducing the sentimental information in the knowledge base, the proposed model can extend the semantic of a sentence with an implicit sentiment. Then, a bi-directional long–short term memory model with multi-polarity orthogonal attention is adopted to fuse the distilled sentimental knowledge with the semantic embedding, effectively enriching the representation of sentences. Experiments on the SMP2019-ECISA implicit sentiment dataset show that our model fully utilizes the information of the knowledge base and improves the performance of Chinese implicit sentiment analysis.  相似文献   

MTGCN: A multi-task approach for node classification and link prediction in graph data     

《Information processing & management》2022,59(3):102902

Both node classification and link prediction are popular topics of supervised learning on the graph data, but previous works seldom integrate them together to capture their complementary information. In this paper, we propose a Multi-Task and Multi-Graph Convolutional Network (MTGCN) to jointly conduct node classification and link prediction in a unified framework. Specifically, MTGCN consists of multiple multi-task learning so that each multi-task learning learns the complementary information between node classification and link prediction. In particular, each multi-task learning uses different inputs to output representations of the graph data. Moreover, the parameters of one multi-task learning initialize the parameters of the other multi-task learning, so that the useful information in the former multi-task learning can be propagated to the other multi-task learning. As a result, the information is augmented to guarantee the quality of representations by exploring the complex constructure inherent in the graph data. Experimental results on six datasets show that our MTGCN outperforms the comparison methods in terms of both node classification and link prediction.  相似文献   

学术创业：研究综述与展望     

周炜  蔺楠  张茜 《科研管理》2022,43(1):14-21

    以1980至2020年发表的相关文献为基础,对学术创业的研究内容进行梳理,内容如下：（1）总结了已有研究中常用的学术创业概念和分类;（2）围绕学术创业主体,重点阐述了个体层面学术创业活动的研究成果;（3）对学术创业领域常用的理论及其适用问题进行了诠释;（4）从社会经济和基础科学两个方面介绍了学术创业的影响;（5）提出学术创业的研究展望,即关注数智经济阶段学术创业类型的变化、拓展学术创业研究的理论视角、扩充学术创业的研究主题以及在进一步完善国内学术创业研究体系的同时,深化中国制度背景下学术创业问题的探索,如儒家文化环境中的学术创业动机,不同地区/省份的学术创业差异等。通过对已有研究的梳理,为中国学术创业的研究和发展提供了参考。  相似文献   

基于信息关联的负面网络舆情风险分级与预测研究          下载免费PDF全文

邓建高  吴灵铭  齐佳音  徐绪堪  刘亦航 《情报科学》2022,39(1):38-43

【目的/意义】网络社会充斥大量负面网络舆情,负面网络舆情风险分级和研判对提高网络治理能力和网络 社会治理成效意义重大。【方法/过程】构建负面网络舆情风险指标体系,并采用熵权法计算风险指标权重;基于加 权GRA模型计算灰色加权信息关联度,在此基础上,运用k-means聚类算法构建负面网络舆情风险分级方案,据此 对负面网络舆情进行风险预测。【结果/结论】实证分析结果表明,所建负面网络舆情风险分级模型客观性强、可靠 度高,可为负面网络舆情风险精准响应提供有效决策依据。【创新/局限】以信息关联为视角,为负面网络舆情风险 分级与预测提供了新的研究框架,但典型案例数据库有待继续完善。  相似文献   

Perceived workplace discrimination,coping and psychological distress among unskilled Indonesian migrant workers in Malaysia     

《Int J Intercult Relat》2017

Migrant workers face many migration-related stressors that may affect their mental health. This study examines workplace discrimination in relation to psychological distress, and the role of coping among unskilled Indonesian migrant workers in Malaysia. In a sample of 119 workers (39 males and 80 females), results of a hierarchical regression analysis showed that workplace discrimination was positively related to psychological distress. Both problem-oriented coping and emotion/avoidance coping were predictive of distress. While problem-oriented coping was associated with lower distress, emotional/avoidance coping was related with higher distress levels. In addition, low emotion/avoidance coping was found to buffer the adverse effect of discrimination on distress. These results are discussed in relation to the literature on coping as well as the social-cultural context of the migrants and the host country.  相似文献   

上海体育舞蹈开展现状调查研究     

丁云霞 《哈尔滨体育学院学报》2009,27(2)

通过资料收集、问卷调查等方法对上海市闵行区体育舞蹈开展的现状进行调查,获得了上海体育舞蹈参与人员的年龄、训练周期、训练内容等基础信息,了解了体育舞蹈指导老师的知识结构、资格等级、年龄特点等信息,从而为上海体育舞蹈未来的科学、有效发展提出了建议。  相似文献   

“众包”背景下顾客自我生产的前因及其对企业影响实证研究     

李耀  周密  王新新 《中国软科学》2016,(4):108-121

十三五规划将众包作为拓展产业发展空间、提升产业创新能力的孵化模式之一。众包模式的实施依赖于每个接包个体或群体的自组织生产。顾客作为众包任务接包者之一和产品最终使用者,厘清其自我生产的前因及其对企业的影响具有重要意义。本文依据MOA理论和自我服务偏见理论构建顾客自我生产前因与影响理论模型,并通过市场研究公司收集数据进行实证检验。结果发现:顾客自我生产是动机、机遇和能力共同作用的结果,三者在领域兴趣、预期收益等因素对自我生产影响过程中具有完全中介作用;自我生产可以明显提升顾客的企业评价、后续购买意愿和口碑宣传意愿,但仅发生在生产结果低于顾客预期情况下;当生产结果高于顾客预期时,自我生产对企业并无显著影响。  相似文献   

政治关联与商业模式创新：吸收能力的调节效应     

曾萍  黄紫薇  汪金爱 《科研管理》2020,41(4):151-159

针对企业构建政治关联能否激发以及怎样激发商业模式创新的问题，本文构建了政治关联在吸收能力调节下影响商业模式创新的理论模型。以384家企业为样本进行的实证检验表明：企业构建政治关联能够激发商业模式创新，知识消化能力强化了政治关联对商业模式创新的积极影响，但知识获取能力却削弱了政治关联对企业商业模式创新的积极影响。这些发现一定程度揭示了企业政治关联影响商业模式创新的内在机制，区分了不同维度吸收能力的调节效应差异，对企业商业模式创新理论与实践的发展起到了促进作用。  相似文献   

Fault estimation for delta operator switched systems with mode-dependent average dwell-time     

Hao Hu  Yan Li  Jinliang Liu  Engang Tian  Xiangpeng Xie 《Journal of The Franklin Institute》2021,358(11):5971-5984

  相似文献