期刊文献+
共找到5,391篇文章
< 1 2 250 >
每页显示 20 50 100
线性分组码的GRAND算法研究
1
作者 史治平 杨娟 +1 位作者 李坤阳 王玥 《移动通信》 2024年第5期49-54,共6页
随着5G通信技术的发展与应用,高可靠低时延通信场景下的短包信道编译码技术受到了广泛关注。GRAND是一种通用的最大似然译码算法,与传统译码算法不同,GRAND算法通过噪声猜测和码本查询来确定发送码字,具有高效的硬件实现结构。介绍了GR... 随着5G通信技术的发展与应用,高可靠低时延通信场景下的短包信道编译码技术受到了广泛关注。GRAND是一种通用的最大似然译码算法,与传统译码算法不同,GRAND算法通过噪声猜测和码本查询来确定发送码字,具有高效的硬件实现结构。介绍了GRAND及其改进算法的基本原理,通过仿真分析了不同GRAND算法的误码率性能;针对5G NR的LDPC短码以及PAC短码给出了GRAND算法的设计方案,为未来移动通信的短码设计提供参考。 展开更多
关键词 短码 grand算法 线性分组码
下载PDF
Prosperity·The Grand Canal Beijing Unveils New Cultural Landmarks The Grand Canal Museum of Bejing
2
作者 Xu Jing 《China & The World Cultural Exchange》 2024年第1期32-36,共5页
As a leading project of Beijing's visionary endeavor to construct a"City of Museums"and establish the Grand Canal Cultural Belt,the Grand Canal Museum of Beijing also an emblematic item fostering coordin... As a leading project of Beijing's visionary endeavor to construct a"City of Museums"and establish the Grand Canal Cultural Belt,the Grand Canal Museum of Beijing also an emblematic item fostering coordinated development between Beijing,Tianjin,and Hebei Province.It is an intelligent comprehensive museum that integrates the functions of exhibition,social education,cultural protection and conservation,collection and storage. 展开更多
关键词 EDUCATION grand INTEGRATE
下载PDF
Writing the Silenced Female Body, Scrutinizing the Grand Narrative of Colonization and Decolonization: The Body in Zoë Wicomb’s David’s Story
3
作者 SHI Ju-hong LUO Wen-jie 《Journal of Literature and Art Studies》 2024年第7期576-583,共8页
David’s Story by Zoë Wicomb addresses the complexities of representing female suffering and the limitations of traditional historical narratives in capturing the experiences of marginalized bodies.It challenges ... David’s Story by Zoë Wicomb addresses the complexities of representing female suffering and the limitations of traditional historical narratives in capturing the experiences of marginalized bodies.It challenges the grand narratives of national history by emphasizing the indispensable role of women’s experiences.Through characters like Dulcie and Rachael,Wicomb portrays the female body as a site of resistance and resilience,highlighting the need for more nuanced and inclusive ways of documenting history.Underscoring the inexpressibility of trauma and the limitations of language and representation,the novel self-reflexively acknowledges its own aporia of completing the narrative,embodying the ongoing struggle to capture the full breadth of human experience. 展开更多
关键词 David’s Story silenced female body caution against grand narrative
下载PDF
Africa’s Grand Walk to Greatest Tomorrow
4
作者 ABISAI TEMBA 《ChinAfrica》 2024年第1期64-64,共1页
The book initiates by portraying Africa,introducing its physical features and endowments,and providing a concise historical perspective that highlights Africa as the initial home of the human species.Subsequently,the ... The book initiates by portraying Africa,introducing its physical features and endowments,and providing a concise historical perspective that highlights Africa as the initial home of the human species.Subsequently,the book explores another epoch in Africa’s self-consciousness,focusing on the Pan-Africanism in the middle of the 20th century-the time when Africa had been greatly subjected to imperialism and colonialism,which plunged it into great destitution. 展开更多
关键词 grand AFRICA GREAT
下载PDF
The Delivery of Grand Multiparas in a Semi-Rural Setting: A Cross-Sectional Descriptive Study at the Ayos Locality of Cameroon
5
作者 Serge Robert Nyada Cliford E. Ebong +6 位作者 Véronique Mboua Christiane Nsahlai Pascale Mpono Emenguele Michelle Mendoua Junie Metogo Isidore Tompeen Cyrile Claude Noa Ndoua 《Open Journal of Obstetrics and Gynecology》 CAS 2023年第1期74-81,共8页
Introduction: Grand multiparity is a known risk factor for maternal and fetal complications. Materials and Methods: We carried out a cross-sectional descriptive study on the delivery of grand multiparas at the materni... Introduction: Grand multiparity is a known risk factor for maternal and fetal complications. Materials and Methods: We carried out a cross-sectional descriptive study on the delivery of grand multiparas at the maternity of the regional hospital annex of Ayos, a semi-rural locality in the Center region of Cameroon. The study covered the period from January 2012 through December 2020, and the objective was to assess the frequency, the determinants and the outcome of delivery in grand multiparas. Results: We recorded 1384 deliveries and enrolled 137 cases of delivery of grand multiparas. This gives a frequency of grand multipara delivery of 9.89%. The mean age of the women was 34.96 ± 4.45 years. Married parturients accounted for 65% of the cases and 16.8% were HIV positive. Delivery occurred at term in 89.9%. In 35.8%, no antenatal consultation was done. The use of the partograph during labor was reported in 11.7%. Per vaginal delivery was noted in 88.3%, emergency cesarean in 10.2% and elective cesarean in 1.5%. The most frequent maternal complications included post-partum hemorrhage (19.9%), genital tract tears (12.4%), endometritis (9.5%) and surgical wound infection (8.7%). No maternal death was recorded. The mean birth weight of the newborns was 3336.8 ± 550 g. Fetal complications were mostly represented by neonatal infection (20.1%), perinatal death (7.9%) and neonatal asphyxia (9.5%). Conclusion: The frequency of grand multiparous delivery in the semi-rural locality of Ayos, Cameroon, was 9.89%. The mean age of parturients was 38.96 years and the proportion of vaginal delivery was 88.3%. 展开更多
关键词 grand Multipara Delivery Semi Rural Cameroon
下载PDF
The China Cardiovascular Health Index 2023 was Grandly Released
6
《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2023年第8期783-783,共1页
On May 26th,the China Cardiovascular Health Index 2023 was grandly released at the opening ceremony of the 17th Oriental Congress of Cardiology.The China Cardiovascular Health Index(CHI)is not only the first medical i... On May 26th,the China Cardiovascular Health Index 2023 was grandly released at the opening ceremony of the 17th Oriental Congress of Cardiology.The China Cardiovascular Health Index(CHI)is not only the first medical index-type indicator reflecting and measuring the status of cardiovascular diseases and treatment in our country,but also the world's first comprehensive index assessment of three-dimensional scanning for cardiovascular disease prevention and control at a national level.It holds a milestone significance for thedevelopmenttof cardiovascular disease prevention and treatment. 展开更多
关键词 PREVENTION grand RELEASE
下载PDF
An Outline of the Grand Unified Theory of Gauge Fields
7
作者 Bi Qiao 《Journal of Modern Physics》 CAS 2023年第3期212-326,共25页
This paper attempts to propose a grand unified guiding principle of gauge fields from the mathematical and physical picture of fiber bundles: it is believed that our universe may have more fundamental interactions tha... This paper attempts to propose a grand unified guiding principle of gauge fields from the mathematical and physical picture of fiber bundles: it is believed that our universe may have more fundamental interactions than the four fundamental interactions, and the gauge fields of these fundamental interactions are just a unified gauge potential on the fiber bundle manifold or the components connected to the bottom manifold, that is, our universe;these components can meet the transformation of gauge potential, and even can be transformed from a fundamental interaction gauge potential to another fundamental interaction gauge potential, and can be summarized into a unified equation, namely the expression of the generalized gauge equation, corresponding to the gauge transformation invariance;so gauge transformation invariance is a necessary condition to unify field theory, but quantization of field is not a necessary condition;the four (or more) fundamental interaction fields of the universe are unified into a universal gauge field defined by the connection of the principal fiber bundle on the cosmic base manifold. 展开更多
关键词 Gauge Field Principal Fiber Bundle Gauge Transformation Invariance grand Unified Theory of Physics
下载PDF
Grand canonical Monte Carlo simulation study of hydrogen storage by Li-decorated pha-graphene
8
作者 张蒙蒙 张凤 +7 位作者 吴强 黄欣 闫巍 赵春梅 陈伟 杨志红 王允辉 武婷婷 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第6期476-480,共5页
Grand canonical Monte Carlo simulation(GCMCs)is utilized for studying hydrogen storage gravimetric density by pha-graphene at different metal densities,temperatures and pressures.It is demonstrated that the optimum ad... Grand canonical Monte Carlo simulation(GCMCs)is utilized for studying hydrogen storage gravimetric density by pha-graphene at different metal densities,temperatures and pressures.It is demonstrated that the optimum adsorbent location for Li atoms is the center of the seven-membered ring of pha-graphene.The binding energy of Li-decorated phagraphene is larger than the cohesive energy of Li atoms,implying that Li can be distributed on the surface of pha-graphene without forming metal clusters.We fitted the force field parameters of Li and C atoms at different positions and performed GCMCs to study the absorption capacity of H_(2).The capacity of hydrogen storage was studied by the differing density of Li decoration.The maximum hydrogen storage capacity of 4Li-decorated pha-graphene was 15.88 wt%at 77 K and100 bar.The enthalpy values of adsorption at the three densities are in the ideal range of 15 kJ·mol^(-1)-25 kJ·mol^(-1).The GCMC results at different pressures and temperatures show that with the increase in Li decorative density,the hydrogen storage gravimetric ratio of pha-graphene decreases but can reach the 2025 US Department of Energy's standard(5.5 wt%).Therefore,pha-graphene is considered to be a potential hydrogen storage material. 展开更多
关键词 hydrogen storage pha-graphene grand canonical Monte Carlo simulation(GCMCs) force field
下载PDF
“Elites”Gathering,Looking Forward to the Future!The Grand Event about the Whole Industry Chain of Surfactant is Encouraging!
9
《China Detergent & Cosmetics》 CAS 2023年第2期81-83,共3页
Perceive a new tendency,see a new future,take advantage of new technologies and lead a new wave!From Mar.23rd-25th,the“2023 China Surfactant Industry Conference”and“2023 China International Surfactant Industry Expo... Perceive a new tendency,see a new future,take advantage of new technologies and lead a new wave!From Mar.23rd-25th,the“2023 China Surfactant Industry Conference”and“2023 China International Surfactant Industry Expo”were held fervently at Guangzhou Nanfeng Langham Hotel.This grand event was sponsored by China Research Institute of Daily Chemical Industry,undertaken by China Daily Chemical Industry Information Center and Surfactant&Detergent Industry Productivity Promotion Center. 展开更多
关键词 grand WHOLE ELITE
下载PDF
Grand Opening of 2023‘Happy Chinese New Year’ Float Parade and Square Celebration in Mauritius
10
作者 Su Xueming 《China & The World Cultural Exchange》 2023年第2期33-34,共2页
On February 3,the 2023"Happy Chinese New Year"Float Parade and Square Celebration greeted the public in Port Louis,Mauritius.On the afternoon of that day,the streets of Port Louis were crowded with people bu... On February 3,the 2023"Happy Chinese New Year"Float Parade and Square Celebration greeted the public in Port Louis,Mauritius.On the afternoon of that day,the streets of Port Louis were crowded with people bustling with floats and flags flying.The grandly dressed people presented smile,with the streets filled with the joy of Chinese New Year. 展开更多
关键词 DRESS grand filled
下载PDF
Exploring the Connotation of Nationalism and Tragic Content in Chopin’s Compositions-Take“Andante Spianato Et Grand Polonaise Brillante,Op.22”as an Example
11
作者 ZHAO Yu-han 《Journal of Literature and Art Studies》 2023年第10期789-795,共7页
Polish composer Chopin’s“Andante Spianato Et Grand Polonaise Brillante,Op.22”,composed in the 19th century,has distinctive features from compositional techniques to acoustic characteristics,and has very unique musi... Polish composer Chopin’s“Andante Spianato Et Grand Polonaise Brillante,Op.22”,composed in the 19th century,has distinctive features from compositional techniques to acoustic characteristics,and has very unique musical connotations,especially the often-mentioned national and melancholic features in Chopin’s music.Based on the research plan,this paper aims at exploring the nationalism and tragic content in Chopin’s works and further exploring the potential emotional and spiritual core of Chopin’s compositions through the study of his socio-psychological situation and his unique style of compositional techniques. 展开更多
关键词 Chopin grand Polonaise ETHNICITY tragic content
下载PDF
Grand Song of the Dong Ethnic Group Singing for the Belt and Road
12
作者 Liu Xiao 《China & The World Cultural Exchange》 2023年第11期46-48,共3页
During the 3rd Belt and Road Forum for International Cooperation,the Children's Chorus of Xiaohuang Village Primary School from the hometown of Grand Song of the Dong Ethnic Group in Guizhou sang for guests at hom... During the 3rd Belt and Road Forum for International Cooperation,the Children's Chorus of Xiaohuang Village Primary School from the hometown of Grand Song of the Dong Ethnic Group in Guizhou sang for guests at home and abroad at China National Arts and Crafts Museum and China Intangible Cultural Heritage Museum(CTCM).The pure and beautiful voice won the praise of the foreign guests and the attention of allwalks oflife. 展开更多
关键词 BEAUTIFUL grand ROAD
下载PDF
拓斯克为拉丁美洲GrandBay生活用纸生产线提供技术支持
13
《中华纸业》 CAS 2023年第4期70-70,共1页
本刊讯(Toscotec消息)2023年1月,拉丁美洲集团GrandBay Papeles Nacionales选择拓斯克(Toscotec)为其位于哥伦比亚的Pereira生产基地提供新的AHEAD2.2领先型生活用纸生产线PM5的交钥匙工程。这是拓斯克与GrandBay合作的第二个项目,第一... 本刊讯(Toscotec消息)2023年1月,拉丁美洲集团GrandBay Papeles Nacionales选择拓斯克(Toscotec)为其位于哥伦比亚的Pereira生产基地提供新的AHEAD2.2领先型生活用纸生产线PM5的交钥匙工程。这是拓斯克与GrandBay合作的第二个项目,第一个项目是拓斯克正为其在危地马拉的工厂安装一条完整的AHEAD 2.2L领先型生活用纸生产线。PM5计划于2024年开机。 展开更多
关键词 生活用纸 交钥匙工程 grand 领先型 拉丁美洲 AHEAD 危地马拉 哥伦比亚
下载PDF
Resolving the“Matteo Ricci Puzzle”:Top-Level Design of the Grand Canal of China Based on the Ternary Leadership Theory
14
作者 LI Jing TIAN Dexin 《Journalism and Mass Communication》 2023年第1期1-16,共16页
Guided by the ternary leadership theory from the perspective of social psychology,this paper explores the impacts of authoritarian,benevolent,and moral leadership on the top design of the Grand Canal of China in terms... Guided by the ternary leadership theory from the perspective of social psychology,this paper explores the impacts of authoritarian,benevolent,and moral leadership on the top design of the Grand Canal of China in terms of its water management practice,while providing reference for resolving the“Matteo Ricci Puzzle”.The research findings are threefold:first,authoritarian as it is,the central government of China formulates relevant laws and regulations to provide legal system insurance for the construction of the Grand Canal Cultural Belt,thus providing the blueprint for constructing the“bright cultural belt,green ecological belt and colorful tourism belt of the Grand Canal”.Second,led by the Central Government,sticking to benevolent and moral leadership,China advocates scientific water management concepts and methods,and gives long-term and comprehensive care to the well-being of the people along the banks of the Grand Canal.Finally,the top-level design of the Grand Canal of China is based on the ternary leadership theory rooted in social psychology and has formulated a set of properly-scheduled,reasonably-coordinated,and flexibly-operated management system for the fundamental interests of the people and long-term goals of the country. 展开更多
关键词 social psychology ternary leadership theory top design management of the grand Canal of China Matteo Ricci’s puzzle
下载PDF
三重战略逻辑视域下的德国国家安全战略 被引量:1
15
作者 郑春荣 林卓然 《国际展望》 北大核心 2024年第2期24-46,161,162,共25页
德国出台的首份《国家安全战略》报告引起了国际社会的广泛关注。以大战略、机会主义、风险管理三种制定战略的政治逻辑为视角,系统检视德国的首份《国家安全战略》报告,可以发现,德国国家安全战略目前仍属于一种较为模糊的原则性规划,... 德国出台的首份《国家安全战略》报告引起了国际社会的广泛关注。以大战略、机会主义、风险管理三种制定战略的政治逻辑为视角,系统检视德国的首份《国家安全战略》报告,可以发现,德国国家安全战略目前仍属于一种较为模糊的原则性规划,其详细行动计划还有待观察。同时,从长期的历史角度看,德国国家安全战略还存在有限的机会主义特征。此外,德国的国家安全政策以防范风险为主,重点是对军事、经济和制度的风险管理。在这种混合性质的国家安全战略引导下,未来德国外交中克制文化的约束力将进一步弱化,跨大西洋伙伴关系会进一步巩固,欧洲战略自主也将在北约框架下艰难推进,但德国国家安全战略的实施将受到其失稳的内政和美国大战略变动等因素的多重影响。 展开更多
关键词 德国 国家安全战略 大战略 风险管理 机会主义
下载PDF
基于遥感监测的沿运洼地内涝特征与影响因素研究
16
作者 王大勇 管清花 +4 位作者 金瑞清 刘丹 窦俊伟 陈学群 范明元 《灌溉排水学报》 CAS CSCD 2024年第6期99-105,112,共8页
【目的】探究沿运邳苍郯新平原洼地内涝特征及影响因素。【方法】以沿运洼地为重点研究区域,在内涝影响范围内开展勘测、遥感解译等,分析洪涝前后归一化差异水体指数(NDWI)及归一化植被指数(NDVI)特征,研究沿运邳苍郯新平原涝洼地内涝... 【目的】探究沿运邳苍郯新平原洼地内涝特征及影响因素。【方法】以沿运洼地为重点研究区域,在内涝影响范围内开展勘测、遥感解译等,分析洪涝前后归一化差异水体指数(NDWI)及归一化植被指数(NDVI)特征,研究沿运邳苍郯新平原涝洼地内涝影响范围变化及其对农作物长势影响,探索水利设施建设等对灾害范围的影响。【结果】(1)受灾作物2004年与2005年NDVI的差值为0.5,未受灾区域2004年与2005年NDVI差值为0.25,受灾作物NDVI显著降低,受灾区域内2005年整年作物生长情况弱于2004年。(2)台儿庄节制闸建成后可降低洪涝对附近农田的影响,有效减少洪涝灾害造成的经济损失。【结论】洪涝灾害对洼地内作物长势影响大于洼地外作物,水利设施建设可以有效减少洪涝灾害造成的经济损失;遥感监测技术是防治洪涝灾害的有效手段。 展开更多
关键词 沿运洼地 内涝特征 归一化差异水体指数 归一化植被指数 水利设施
下载PDF
面向卓越人才培养的大工程中心构建及实施
17
作者 张海光 郭帅 +1 位作者 彭章友 何岚岚 《实验室研究与探索》 CAS 北大核心 2024年第7期111-115,共5页
面向国家社会、世界科技以及经济产业对卓越人才的需求,工程训练中心作为工程教育实施的主战场,承担着高等院校落实具体人才培养方案的重要使命,通过吸取国内外知名高校工程教育经验,结合学校特点,突破中心原有架构,重构和重塑工程训练... 面向国家社会、世界科技以及经济产业对卓越人才的需求,工程训练中心作为工程教育实施的主战场,承担着高等院校落实具体人才培养方案的重要使命,通过吸取国内外知名高校工程教育经验,结合学校特点,突破中心原有架构,重构和重塑工程训练中心实践教学体系,以卓越工程素养、文化教育和领军人才培养为目标,建设多学科交叉的大工程中心。围绕大工程中心建设目标,从一流实践教学平台、全新实践课程体系以及新型科产教基地3个方面,详细阐述基础工训实践平台、大工程仿真平台、大工程实践平台及重大竞赛4大平台的建设内容和建设方案;构建“厚基础-分层级-大综合”的工程实践课程体系,将工程训练中心建设成为国内一流的工程创新实践基地。 展开更多
关键词 工程教育 大工程中心 实践教学 实践基地 实践课程体系
下载PDF
台湾地区“大法官释宪”对警察权转型的影响
18
作者 张淑平 刘静 《台湾研究集刊》 2024年第2期18-30,共13页
从1990年至今,台湾地区“大法官释宪”制度在限制警察权和保障人权等方面发挥了重要作用。在人身自由等基本人权保障方面,“大法官”议决坚持法官保留、正当法律程序、法律明确性和比例原则,使威权时期极度扩张的警察权受到严格规范和制... 从1990年至今,台湾地区“大法官释宪”制度在限制警察权和保障人权等方面发挥了重要作用。在人身自由等基本人权保障方面,“大法官”议决坚持法官保留、正当法律程序、法律明确性和比例原则,使威权时期极度扩张的警察权受到严格规范和制约,进而实现转型。近年来在警察执法的隐私权保护领域,“大法官释宪”也取得了一定成绩。台湾地区“大法官释宪”制度的升级,将继续影响台湾地区警政制度的发展与走向。 展开更多
关键词 台湾地区 “大法官” “释宪” 警察权
下载PDF
针刺治疗广泛性焦虑障碍疗效和安全性的Meta分析
19
作者 杨茜 张捷 +3 位作者 肖萱 刘元媛 满增琪 张涛 《中国现代医生》 2024年第14期37-45,共9页
目的应用Meta分析评价针刺治疗广泛性焦虑障碍临床疗效及安全性。方法检索自建库至2022年5月1日的中英文数据库中关于针刺治疗广泛性焦虑障碍的随机对照试验,进行筛选、纳入及文献风险评估。应用Stata 16、Review Manager 5.4软件对不... 目的应用Meta分析评价针刺治疗广泛性焦虑障碍临床疗效及安全性。方法检索自建库至2022年5月1日的中英文数据库中关于针刺治疗广泛性焦虑障碍的随机对照试验,进行筛选、纳入及文献风险评估。应用Stata 16、Review Manager 5.4软件对不同结局指标和(或)干预措施进行Meta分析及亚组分析。结果最终纳入20篇随机对照试验文献,包含病例数1661例,4种干预措施(针刺+电针、针刺、电针、西药)。Meta分析结果提示采用随机效应模型,针刺组对比西药组治疗在汉密尔顿焦虑量表(Hamiltonanxiety scale,HAMA)、焦虑自评量表(self-ratinganxiety scale,SAS)评分差异均有统计学意义(P<0.05)。亚组分析结果显示:针刺组较阿普唑仑在HAMA评分差异有统计学意义;针刺组较单纯帕罗西汀、丁螺环酮、氯羟去甲安定/谷维素/心得安在SAS评分差异有统计学意义。在不良反应量表评定上,针刺(包括电针)组较西药组差异有统计学意义(P<0.01)。结论针刺(包括电针)可以有效改善焦虑情绪及症状,疗效不亚于西药,且具有不良反应少、安全性较高等优势。但纳入文献的数量不足、质量不高,仍需多中心、大样本、高质量的随机对照研究进一步印证以上结论。 展开更多
关键词 广泛性焦虑障碍 META分析 针刺 电针 系统评价
下载PDF
以文旅融合促进大运河文化带流通供应链完善的策略研究——以京津冀运河段为例 被引量:1
20
作者 朱群芳 杨雨昕 《供应链管理》 2024年第3期79-96,共18页
2020年我国发布的《大运河文化和旅游融合发展规划》为相关城市发展以及有关产业更新提供了思路,运河沿线的商流在逐渐恢复和壮大。京津冀作为大运河主要流经区域,对运河文旅产业的发展也十分重视。文章主要通过文献研究法,以京津冀运... 2020年我国发布的《大运河文化和旅游融合发展规划》为相关城市发展以及有关产业更新提供了思路,运河沿线的商流在逐渐恢复和壮大。京津冀作为大运河主要流经区域,对运河文旅产业的发展也十分重视。文章主要通过文献研究法,以京津冀运河段为研究对象,通过对京津冀运河段文旅产业发展现状的分析,针对其所存在的问题,探讨以文旅融合促进大运河文化带流通供应链完善的策略。 展开更多
关键词 大运河文化带 文化产业 旅游产业 文旅融合 流通供应链
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部