期刊文献+
共找到110,060篇文章
< 1 2 250 >
每页显示 20 50 100
Spherical Functions on Fuzzy Lie Group
1
作者 Murphy E. Egwe Samuel S. Sangodele 《Advances in Pure Mathematics》 2024年第4期185-195,共11页
Let G be a locally compact Lie group and its Lie algebra. We consider a fuzzy analogue of G, denoted by called a fuzzy Lie group. Spherical functions on are constructed and a version of the existence result of the Hel... Let G be a locally compact Lie group and its Lie algebra. We consider a fuzzy analogue of G, denoted by called a fuzzy Lie group. Spherical functions on are constructed and a version of the existence result of the Helgason-spherical function on G is then established on . 展开更多
关键词 Fuzzy Spherical Function Fuzzy Lie group Fuzzy Manifolds
下载PDF
Extension of Paraconsistent Many-Valued Similarity Method to Group Decision
2
作者 Abdulai Inusah 《Journal of Applied Mathematics and Physics》 2024年第3期944-981,共38页
The Paraconsistent Many-Valued Similarity (PMVS) method for multi-attribute decision making will be incomplete as a decision model if it is not extended to the realm of group decision-making. Therefore, in this articl... The Paraconsistent Many-Valued Similarity (PMVS) method for multi-attribute decision making will be incomplete as a decision model if it is not extended to the realm of group decision-making. Therefore, in this article, our primary objective is to show how the paraconsistent many-valued similarity method can be used to solve group decision-making problems involving choice making or ranking of a finite set of decision alternatives. Moreover, since weights are very important parameters in multi-attribute decision-making, we have introduced the Borda rule to calculate the weights of experts and that of every criterion under consideration. To demonstrate how the proposed method works, a numerical example on energy sources of an economy from the points of view of a group of experts is investigated. Further, we compare the results of this new approach with that of fuzzy TOPSIS group decision-making method to illustrate the robustness and effectiveness of the former. 展开更多
关键词 Multiple Criteria Evaluation group Decision-Making Paraconsistent Borda Rule Energy Sources Global Strength Global Weakness Aggregated Evidence Couples
下载PDF
Group2vec:基于无监督机器学习的基团向量表示及其物性预测应用
3
作者 吴心远 刘奇磊 +2 位作者 曹博渊 张磊 都健 《化工学报》 EI CSCD 北大核心 2023年第3期1187-1194,共8页
定量构效关系模型在化工产品设计中发挥着重要作用。基于自然语言处理技术的深度学习建模方法是构建定量构效关系模型的有效方法之一。提出一种基于基团词嵌入模型(Group2vec)的深度学习物性预测框架。首先,建立数据库用于预训练与物性... 定量构效关系模型在化工产品设计中发挥着重要作用。基于自然语言处理技术的深度学习建模方法是构建定量构效关系模型的有效方法之一。提出一种基于基团词嵌入模型(Group2vec)的深度学习物性预测框架。首先,建立数据库用于预训练与物性预测。其次,利用基团分割方法,将数据库中分子SMILES文本转化为基团序列。再次,通过CBOW算法将基团序列进行词嵌入预训练,获得包含相似性结构信息的基团向量。最后,基于基团向量构建包含注意力机制的深度学习模型,并在不同物性数据库上进行模型测试,同时将其与现有模型进行比较,对比结果表明基于Group2vec的深度学习物性预测模型不仅具有较高的预测准确性与通用性,也具备一定的可解释性。 展开更多
关键词 产品工程 神经网络 预测 基团 注意力机制
下载PDF
在线Group Lasso学习
4
作者 郑乃嘉 张海 《工程数学学报》 CSCD 北大核心 2023年第2期310-320,共11页
对高维流式数据的在线组变量选择问题进行了研究,提出了带Group Lasso惩罚的逻辑斯蒂回归在线估计方法,并给出了GFTPRL(Group Follow the Proximally Regularized Leader)算法。通过给出GFTPRL算法的缺憾界,证明了算法在理论上是有效的... 对高维流式数据的在线组变量选择问题进行了研究,提出了带Group Lasso惩罚的逻辑斯蒂回归在线估计方法,并给出了GFTPRL(Group Follow the Proximally Regularized Leader)算法。通过给出GFTPRL算法的缺憾界,证明了算法在理论上是有效的。实验结果表明,对于稀疏模型GFTPRL算法的预测分类准确率明显优于其他主流稀疏在线算法。 展开更多
关键词 机器学习 group Lasso 在线学习 逻辑斯蒂回归
下载PDF
面向老龄社会的社区建成环境可步行性测度研究 被引量:1
5
作者 黄丽蒂 刘双双 +1 位作者 郑博丹 卫大可 《南方建筑》 CSCD 北大核心 2024年第1期107-114,共8页
选取大庆市设施布局、路网形态各异的老龄化社区为研究对象,对其可步行性展开研究。宏观与微观层面建立社区可步行性综合测度模型,利用AHP层次分析法对影响指标进行定性定量的测度评价;中观层面应用步行指数的方法对设施分布及可达性进... 选取大庆市设施布局、路网形态各异的老龄化社区为研究对象,对其可步行性展开研究。宏观与微观层面建立社区可步行性综合测度模型,利用AHP层次分析法对影响指标进行定性定量的测度评价;中观层面应用步行指数的方法对设施分布及可达性进行分析。结果表明:可步行性综合测度模型和步行指数可以较好的反映社区的可步行性;土地利用多样性、路网结构方式、设施分布及步行环境质量等因素都影响社区步行友好水平。建议:对于社区规划:构建合理路网结构,增加社区用地多样性,打造良好步行环境,提升老年人步行舒适性和愉悦性。对于建成社区:调整现有道路空间,优化停车空间和停车方式,健全社区养老服务设施体系。 展开更多
关键词 老龄化 可步行性 老年人 社区 步行指数
下载PDF
Investigation into Protective Groups for Anilino Functionality upon Oxone-Mediated Oxidative Esterification
6
作者 Tomoko Mineno Takeya Yamamoto +1 位作者 Tomoya Nobuta Hisao Kansui 《International Journal of Organic Chemistry》 CAS 2023年第1期7-15,共9页
In the course of organic synthesis, particularly for multi-step synthesis or natural product total synthesis, the selection of appropriate protective groups for the intended functionality is crucial in order to achiev... In the course of organic synthesis, particularly for multi-step synthesis or natural product total synthesis, the selection of appropriate protective groups for the intended functionality is crucial in order to achieve chemoselective synthetic goals. The development of many useful protective groups has been reported based on the functionality of the anilino group. Herein, we discuss our study of various protective groups and the processes we used to establish compatibility with anilino functionality via the implementation of Oxone-mediated oxidative esterification in methanol. The results and the details of our experiments are reported herein. 展开更多
关键词 Protective groups Anilino Functionality OXONE ALDEHYDE Oxidative Esterification
下载PDF
服务四川省食品饮料产业的工商专业群人才培养模式探索 被引量:2
7
作者 李依璘 周文 +2 位作者 唐贤华 余牟艳 王雅乔 《江苏商论》 2024年第1期125-128,共4页
依据“双高计划”要求,专业群的人才培养应与产业人才需求精准对接。面向先进制造业、现代农业和现代服务业等重点产业,服务于重点产业转型升级,以体现职业教育为生产劳动服务的功能。工商专业在组群中没有特色,常常被边缘化。因此,要... 依据“双高计划”要求,专业群的人才培养应与产业人才需求精准对接。面向先进制造业、现代农业和现代服务业等重点产业,服务于重点产业转型升级,以体现职业教育为生产劳动服务的功能。工商专业在组群中没有特色,常常被边缘化。因此,要跨专业组群,面向重点产业,兼顾培养懂技术的管理人才,懂管理的技术人才。通过“技术+管理”“工科+商科”,跨专业跨领域交叉融合,服务四川省食品饮料产业。目标是培养“懂管理、善操作、精技术”的复合型技术技能人才和“懂技术、会经营、擅管理”的技术技能型管理人才。 展开更多
关键词 高职院校 双高计划 重点产业 专业群 人才培养
下载PDF
社会创新中的服务设计方法应用 被引量:1
8
作者 李栋 何颂飞 《设计》 2024年第4期42-46,共5页
探究社会创新理念和服务设计在推动社区群体共创中的系统模式和创新思路。基于服务设计的思维方法,对社区创新的服务要素进行分析和梳理,提炼出群体价值、协调机制和服务关系等3个创新关键。系统连接和驱动城市居民、群体、组织参与共... 探究社会创新理念和服务设计在推动社区群体共创中的系统模式和创新思路。基于服务设计的思维方法,对社区创新的服务要素进行分析和梳理,提炼出群体价值、协调机制和服务关系等3个创新关键。系统连接和驱动城市居民、群体、组织参与共创行动,构建“以社区为中心”“协同参与”的服务网络,提升社区抵御风险和化解问题的能力。结论从理论研究到设计实践,探索在地居民群体价值认同的社区生活方式,提出构建动态的、可持续的城市社区服务新方案。 展开更多
关键词 社区 共创 服务设计 社会创新 群体价值
下载PDF
课程思政视角下校企合作课程“施工组织与管理”教学改革实践 被引量:1
9
作者 陶庆东 马维 +2 位作者 王怡 刘成 魏晓光 《职业技术》 2024年第2期23-29,共7页
为落实全国高校思想政治工作会议精神,响应“思政教育落实到每一节课”的号召,全面推进大思政课建设的工作;在课程思政视角下,以高职院校工程类专业群中“顶层互选”的校企合作课程“施工组织与管理”为例,从课程思政元素挖掘方法、课... 为落实全国高校思想政治工作会议精神,响应“思政教育落实到每一节课”的号召,全面推进大思政课建设的工作;在课程思政视角下,以高职院校工程类专业群中“顶层互选”的校企合作课程“施工组织与管理”为例,从课程思政元素挖掘方法、课程思政元素渗入模式、解析思政元素融入专业课程案例等方面入手,对思政元素有效融入课程教学过程进行研究和实践,实现全员全程全方位育人,保证学生的专业知识学习与思政教育同步同向同行。 展开更多
关键词 施工组织 专业群 思政元素 思政主线
下载PDF
Outcomes of Pregnancy with Group B Streptococcal Infections in Najran, Saudi Arabia
10
作者 Majed Saeed Alshahrani Ali H. Alhajri +10 位作者 Fahad Thamer Almutairi Ashwag Hassan Abdelmajed Fatima Ibrahim Abdalla Yousra Bala Babkir Abdullah Mosab Mohamedelamineltaib Ahmed Faroug Ahmed Abdelaal Mohamed Ahmed Mukhtar Mowafag Bushra Galaleldin Elsayed Marwa Mohamed Ahmed Elkhidir Babikir Nihal Altayeb Abdallah Selma Mohammed Abdelgadir Elhabeeb 《Open Journal of Obstetrics and Gynecology》 2023年第3期395-402,共8页
Background: The gram-positive, beta-hemolytic, and chain-forming Group B Streptococcus (GBS), commonly known as Streptococcus agalactiae, may asymptomatically invade the human gastrointestinal and vaginal tracts. Howe... Background: The gram-positive, beta-hemolytic, and chain-forming Group B Streptococcus (GBS), commonly known as Streptococcus agalactiae, may asymptomatically invade the human gastrointestinal and vaginal tracts. However, GBS may become very invasive and pathogenic to the mother and baby during pregnancy, having negative effects. Study Aim: This study aims to investigate the pregnancy outcomes of women who tested positive for genitourinary GBS infection during pregnancy in Najran, Saudi Arabia. Methods: Data was collected retrospectively from patient files in Armed Forces Hospital, Najran, Saudi Arabia. Data collected were entered to a Microsoft Excel sheet, then imported and analysed using the Statistical Package for Social Sciences. Results: The study included 272 women of whom 66.5% were 31 to 45 years old. Gestational diabetes was diagnosed in 8.5% of the sample, 71.7% had a normal spontaneous vaginal delivery (NSVD), 1.8% had previous abortions, and 27.2% of new-borns were admitted to the NICU after delivery. There was a significant association between NICU admissions and women employment status (p = 0.001), gravidity (p = 0.001), parity (p = 0.001), history of abortions (p = 0.001), medical conditions (p = 0.049), and mode of delivery (p = 0.049). Conclusion: According to the findings of our study, GBS infection during pregnancy is associated to more NICU admissions. NICU admissions were significantly correlated with gestational diabetes, hypertension, and hypothyroidism in mothers but not with intrapartum antibiotic use. 展开更多
关键词 PREGNANCY group B Streptococcal OUTCOMES
下载PDF
Partial Groups, Simplicial K(G, 1)’s and Kan Complexes
11
作者 Solomon Jekel 《Advances in Pure Mathematics》 2023年第11期725-731,共7页
In our paper Simplicial K(G, 1)’s we constructed a sub-complex of the nerve of a group G determined by a partial group structure, and we proved, under a generalized associativity condition called regularity, that the... In our paper Simplicial K(G, 1)’s we constructed a sub-complex of the nerve of a group G determined by a partial group structure, and we proved, under a generalized associativity condition called regularity, that the sub-complex realizes as a K(G, 1). This type of sub-complex appears naturally in several topological and algebraic contexts. In this note we prove that regularity of a partial group implies that the Kan extension condition is satisfied on its nerve in dimensions greater than one, and in dimension one a weaker version of the extension condition holds. 展开更多
关键词 Partial group Simplicial Set NERVE Kan Extension
下载PDF
岗课赛证融通的模块化课程体系研究实践——以物联网应用技术专业群为例 被引量:1
12
作者 胡锦丽 李宏达 程智宾 《重庆电子工程职业学院学报》 2024年第1期86-93,共8页
岗课赛证融通是职业教育类型化的一个核心特征,是“三教”改革的一种全新育人模式。文章分析了岗课赛证的融通机制及融通模式下的物联网专业群课程体系新要求,提出了基于“基础共享、中层分立、高层拓展”课程体系设计思想的“1+X+Y”... 岗课赛证融通是职业教育类型化的一个核心特征,是“三教”改革的一种全新育人模式。文章分析了岗课赛证的融通机制及融通模式下的物联网专业群课程体系新要求,提出了基于“基础共享、中层分立、高层拓展”课程体系设计思想的“1+X+Y”专业群模块化课程体系架构,并以物联网应用技术专业群为例,分析了物联网应用技术专业群与产业链的逻辑关系,构建了岗课赛证融通的“1+X+Y”专业群模块化课程体系,课程体系具有“对接产业要素、满足核心岗位需求、达成应用能力培养”的三型递进关系;并从多师协作的教学团队构建、课程资源开发、网络课程教学平台搭建及教学组织实施四个方面来阐述专业群模块化教学实施途径。 展开更多
关键词 岗课赛证融通 专业群 模块化 课程体系 多师协作
下载PDF
Culture, Beliefs, Attitude and Peer Group Influence on Female Genital Mutilation in Southeast Nigeria
13
作者 Matthew Igwe Nwali Joseph Agboeze 《Open Journal of Obstetrics and Gynecology》 2023年第8期1350-1362,共13页
Background: Female Genital Mutilation is still practiced in Ebonyi State in Southeast Nigeria, despite the complications that follows it and government legislation against the practice. Aim: To determine the impact of... Background: Female Genital Mutilation is still practiced in Ebonyi State in Southeast Nigeria, despite the complications that follows it and government legislation against the practice. Aim: To determine the impact of Culture, Beliefs, attitude and Peer Group Influence on the persistence Female Genital Mutilation practice in the State especially in the rural areas. Materials and Methods: Qualitative study that used Focused Group Discussion and In-depth interviews for data collection. Those willing and given consent were recruited into the group discussion according to age, marital status, educational level and their location in the state. In-depth interviews were used with the Stake Holders, Opinion Leaders, Traditional Rulers and the Clergy. Result: A total of 454 participants were recruited from the 13 local government areas of Ebonyi State but only 420 (92.5%) participated. The age ranges of participants were 25 to 35 years for single males and females while the married participants male and female were aged 35 to 70 years. One hundred single females (23.8%) and 94 single males (21.4%) participated while 97 (23.1%) married women and 95 (22.6%) married men participated. Out of the 26 health workers recruited only 22 (5.2%) participated. Four traditional rulers, 4 women leaders, 4 youth leaders and 2 clergy 12 (2.9%) in number had in-depth interviews. All the participants had knowledge of FGM and its practice. Rural health workers are getting more involved. ‘Female Genital Crushing’ is replacing actual cutting. The participants all agreed there is no benefit and the practice should stop. Conclusion: Female Genital Mutilation is secretly practiced and is getting replaced by “Female Genital Crushing” perpetrated by rural health workers as well as mothers, fathers, traditional birth attendants and the peer group playing a major role with low knowledge of the Law against Female genital mutilation. 展开更多
关键词 Female Genital Mutilation CULTURE BELIEFS ATTITUDE Peer group Influence
下载PDF
Prevalence and Resistance Profile of Muenchen Cefotaximase (CTX-M) Group 1 Extended Spectrum Beta-Lactamase (ESBL)-Producing Uropathogenic Escherichia coli Strains in Dakar, Senegal
14
作者 Abdoulaye Seck Babacar Ndiaye +6 位作者 Abdou Diop Malick Ndao Cheikh Fall Assane Dieng Thierno Abdoulaye Diallo Chantal Mahou Philippe Dubrous 《Open Journal of Medical Microbiology》 2023年第2期137-145,共9页
Background: Extended-spectrum beta-lactamase (ESBL) producing bacteria are a real public health problem, particularly in Africa. Among these ESBLs, there are the Muenchen Cefotaximase (CTX-M) described all over the wo... Background: Extended-spectrum beta-lactamase (ESBL) producing bacteria are a real public health problem, particularly in Africa. Among these ESBLs, there are the Muenchen Cefotaximase (CTX-M) described all over the world of which the most frequent is the CTX-M of group 1 particularly the CTX-M-15 variant. The objective of this study was to determine the prevalence of CTX-M group 1 ESBL-producing Escherichia coli strains and to test their antibiotics susceptibility profile. Methodology: A retrospective cross-sectional descriptive study was conducted to detect ESBL-secreting Escherichia coli strains by the synergy test. Identification of CTX-M type ESBL from group 1 was performed using the NG-Test CTX-M rapid diagnostic test (NG-Biotech®). Antibiotic susceptibility profile was determined using CA-SFM/EUCAST guidelines 2019. Data entry and statistical analysis were performed with Excel version 2010 and SPSS 20.0 respectively. Results: Eighty-two ESBL-producing Escherichia coli strains were tested. A group 1 CTX-M ESBL was detected in 75.6% of the strains (n = 62). These strains were highly resistant to cefotaxim (100%), aztreonam (100%), ceftazidim (85.4%) and cefepim (66.1%). They were also resistant to quinolones, gentamycin and sulfadoxine-trimethoprim combination. However, these strains showed sensitivity to ertapenem (100%), cefoxitin (69.3%), tigecyclin (66%), and amikacin (66.1%). The combination of piperacillin and tazobactam was active on 30.6% of the strains against 6.4% for the combination of amoxicillin and clavulanic acid. Conclusion: The CTX-M type ESBL of group 1 was present in the majority of ESBL-producing Escherichia colis trains. Despite the production of this enzyme conferring resistance to most beta-lactam antibiotics, some antibiotics remain active to treat infections caused by these germs. 展开更多
关键词 Escherichia coli ESBL CTX-M group PREVALENCE Antibiotic Resistance
下载PDF
元宇宙赋能公共图书馆无障碍服务:壁垒突破、体系构建与路径探究 被引量:1
15
作者 郭亚军 张鑫迪 +1 位作者 寇旭颖 庞义伟 《图书馆论坛》 北大核心 2024年第2期20-31,共12页
公共图书馆无障碍服务致力于帮助残障人士等特殊群体享受公共文化服务、共享数字生活,是无障碍环境建设的一部分。元宇宙为公共图书馆无障碍服务提供了新思路,注入了新活力。文章通过阐述公共图书馆无障碍服务在互联网不同阶段的发展与... 公共图书馆无障碍服务致力于帮助残障人士等特殊群体享受公共文化服务、共享数字生活,是无障碍环境建设的一部分。元宇宙为公共图书馆无障碍服务提供了新思路,注入了新活力。文章通过阐述公共图书馆无障碍服务在互联网不同阶段的发展与变化,总结元宇宙赋能公共图书馆无障碍服务实现的壁垒突破,构建无障碍服务体系,探究推进路径。公共图书馆无障碍服务建设应多点突破,以用户需求为主导,提供更便捷的均等化服务,在元宇宙相关技术加持下弥合数字鸿沟,促进社会包容。 展开更多
关键词 元宇宙 公共图书馆 无障碍服务 智慧服务 特殊群体
下载PDF
Interpersonal Perception in Virtual Groups: Examining Homophily, Identification and Individual Attraction Using Social Relations Model in Network
16
作者 Zuoming Wang 《Social Networking》 2023年第2期45-56,共12页
With the penetration of the Internet, virtual groups have become more and more popular. The reliability and accuracy of interpersonal perception in the virtual environment is an intriguing issue. Using the Social rela... With the penetration of the Internet, virtual groups have become more and more popular. The reliability and accuracy of interpersonal perception in the virtual environment is an intriguing issue. Using the Social relations model (SRM) [1], this paper investigates interpersonal perception in virtual groups from a multilevel perspective. In particular, it examines the following three areas: homophily, identification, and individual attraction, and explores how much of these directional and dyadic relational evaluations can be attributed to the effect of the actor, the partner, and the relationship. 展开更多
关键词 Virtual groups Interpersonal Perception Social Relations Model HOMOPHILY IDENTIFICATION Individual Attraction
下载PDF
Vaginal Carriage of Group B Streptococcus in Pregnant Women in Rural Areas in Senegal
17
作者 Babacar Ndiaye Fatoumata Diene Sarr +7 位作者 Mam Coumba Diouf Rokhaya Diop Hamidou Thiam Mohamed Abass Yugo Rose Mbaye Amadou Alpha Sall Cheikh Loucoubar Abdoulaye Seck 《Open Journal of Medical Microbiology》 2023年第3期207-219,共13页
Vaginal carriage of Group B Streptococcus (GBS) is a maternal and child health issue. Our objective was to determine the prevalence of GBS carriage;identify the factors associated with this carriage and determine the ... Vaginal carriage of Group B Streptococcus (GBS) is a maternal and child health issue. Our objective was to determine the prevalence of GBS carriage;identify the factors associated with this carriage and determine the antibiotic sensitivity of the isolated strains. We conducted a cross-sectional and prospective study in rural Senegal (in the health district of Sokone). Socio-demographic, clinical and gynaeco-obstetrical data were collected. Vaginal swabs were taken by the midwives on specific settings in order to test for GBS and other High Risk Vaginal Bacteria (HRVB). Antibiotic susceptibility testing was done according to the recommendations of the CA SFM/EUCAST 2020. In total, 100 pregnant women were targeted and 97 pregnant women were included. Their age ranged from 18 to 40 years with 64.9% (63/97) of participants belonging to the “20 - 30” age group. The overall prevalence of Group B Streptococcus carriage was 15.5% (15/97). However, the proportion of women with at least one high risk infectious bacteria was 29.89% (29/97). No statistically significant differences were found between GBS carriage and the potential factors studied. However, the study also looked for the presence of other high-risk bacteria and coinfections were indeed found between GBS and E. coli and Staphylococcus aureus. Antibiotic susceptibility testing shows that GBS strains were fully susceptible to penicillin G, erythromycin, clindamycin, chloramphenicol, rifampicin and vancomycin. Sensitivities to norfloxacin and gentamycin were 73.3% and 86.7% respectively. In contrast, high resistance to tetracycline (86.7%) was observed. GBS carriage remains a major public health issue because of its consequences for the mother and the newborn. Correct screening and proper monitoring of strain susceptibility remain one of the most effective means of patient management and care. 展开更多
关键词 group B Streptococcus (Streptococcus agalactiae) Vaginal Carriage Antibiotic Susceptibility Senegal
下载PDF
高水平专业群建设产出绩效评价指标体系构建研究 被引量:2
18
作者 佟军民 石振平 俎艺 《职业技术》 2024年第1期52-58,共7页
高水平专业群建设绩效评价既是衡量“双高”建设成效的必然要求,也是促进高职院校内涵式发展的迫切需要,还是下一轮双高计划建设单位遴选的重要举措。依据教育部和财政部相关文件,提出了高水平专业群建设绩效评价体系框架。在对产出指... 高水平专业群建设绩效评价既是衡量“双高”建设成效的必然要求,也是促进高职院校内涵式发展的迫切需要,还是下一轮双高计划建设单位遴选的重要举措。依据教育部和财政部相关文件,提出了高水平专业群建设绩效评价体系框架。在对产出指标选用原则分析的基础上,选出了9个二级指标下的备选三级指标;运用DEMATEL分析法,对备选三级指标进行优化,确定了产出指标下的评价体系和权重。通过高水平专业群建设绩效评价体系的构建,引导专业群建设方向始终指向“双高计划”总体目标,有效提升专业群的人才培养质量与服务能力。 展开更多
关键词 高水平专业群 双高计划 绩效评价 DEMATEL分析法 产出指标
下载PDF
社交媒体广告接触对中国青年群体物质主义倾向的影响 被引量:1
19
作者 宣长春 王小莉 《新闻与传播评论》 北大核心 2024年第1期117-128,共12页
研究在全国范围内展开大型问卷调查,提出社交媒体广告接触正向影响青年群体物质主义倾向,并验证社交网络日常化参与的中介作用以及地区差异的调节作用。其中地区差异的调节作用具体表现为:相较于南方地区,北方地区青年群体的社交媒体广... 研究在全国范围内展开大型问卷调查,提出社交媒体广告接触正向影响青年群体物质主义倾向,并验证社交网络日常化参与的中介作用以及地区差异的调节作用。其中地区差异的调节作用具体表现为:相较于南方地区,北方地区青年群体的社交媒体广告接触对物质主义倾向的强化影响更为显著;相较于二、三线城市,一线城市青年群体的社交媒体广告接触对物质主义倾向的强化影响更为显著;相较于高文化紧密度地区,低文化紧密度地区青年群体的社交媒体广告接触对物质主义倾向的强化影响更为显著。研究关注广告的社会效果,为后续社交媒体广告社会效果的理论建构奠定基础。 展开更多
关键词 青年群体 社交媒体广告接触 价值观 物质主义 社会效果
下载PDF
香蕉主要栽培类型的分类及其起源和演化的研究进展
20
作者 盛鸥 林美富 +6 位作者 何维弟 窦同心 李耀耀 刘灿灿 邓贵明 曾少华 易干军 《广东农业科学》 CAS 2024年第3期14-25,共12页
香蕉是芭蕉科芭蕉属的草本果树,是世界上重要的热带水果之一,同时也是仅次于水稻、小麦和玉米的第四大粮食作物。栽培香蕉品种可简单分为鲜食蕉和主食蕉,大多为三倍体,其遗传背景十分复杂。研究栽培香蕉品种的起源和演化,对加快香蕉育... 香蕉是芭蕉科芭蕉属的草本果树,是世界上重要的热带水果之一,同时也是仅次于水稻、小麦和玉米的第四大粮食作物。栽培香蕉品种可简单分为鲜食蕉和主食蕉,大多为三倍体,其遗传背景十分复杂。研究栽培香蕉品种的起源和演化,对加快香蕉育种进程具有重要的指导意义。近年来香蕉种质资源的分子系统学研究取得较大进展,为开展育种工作提供了很多有用的遗传信息。该文更新了与栽培香蕉关系密切的芭蕉属内各野生种质的分类,对全球常见的栽培类型及其品种特点进行了归纳整理,包含7个基因组类型在内的18个栽培类群。同时,对常见栽培类群(AAA、AAB、ABB、AB)的起源及演化,特别是近期A基因组的祖先种溯源等方面进展进行了总结,并提出了研究展望。该文系统性地总结香蕉栽培品种的起源及演化等方面的科研进展,可为挖掘优异种质和基因资源,指导香蕉育种等方面的研究提供借鉴。 展开更多
关键词 香蕉 栽培类型 起源 演化 种质资源
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部