期刊文献+
共找到9,448篇文章
< 1 2 250 >
每页显示 20 50 100
基于DREAM算法的DSGE模型参数估计精度研究
1
作者 罗琦 赵胜民 《统计与决策》 北大核心 2024年第2期46-51,共6页
文章将人工智能算法中的DREAM算法首次应用到动态随机一般均衡模型的参数估计中,并以动态随机一般均衡模型LS(2005)为例对该算法的估计精度进行了系统分析,研究结果表明:根据待估参数随机抽样序列的箱线图来看,由DREAM算法产生的待估参... 文章将人工智能算法中的DREAM算法首次应用到动态随机一般均衡模型的参数估计中,并以动态随机一般均衡模型LS(2005)为例对该算法的估计精度进行了系统分析,研究结果表明:根据待估参数随机抽样序列的箱线图来看,由DREAM算法产生的待估参数随机抽样序列的箱体长度均比RWMH和IMH算法产生的箱体长度要长,说明由DREAM算法产生的参数估计序列的分散程度比RWMH和IMH算法要大,表明了DREAM算法遍历参数空间范围更为广泛,算法逃逸局部最优值的能力更强。另外,从箱线图中的中位数数值来看,除了5个参数以外,由DREAM算法产生的参数估计序列的中位数相比RWMH和IMH算法,与真实数据生成过程更为接近,说明由DREAM算法产生的参数估计值大部分都集中在参数的真值附近。由于DREAM算法依据IQR统计方法除去无用链,故由DREAM算法产生的参数估计序列的异常值也明显降低,而RWMH算法产生的参数估计序列的异常值尤其多。从待估参数的90%最大后验密度可信区间来看,DREAM算法产生的待估参数90%最大后验密度可信区间除了3个参数以外,其余全部包含了真值,而传统的RWMH和IMH算法分别只有7个和1个区间包含了真值,表明DREAM算法的估计不确定性远小于传统的RWMH和IMH算法。最后,根据待估参数的无效因子来看,DREAM算法产生的待估参数序列与传统的RWMH和IMH算法相比,其相关性更弱,即无效因子数值更小,这一点进一步验证了DREAM算法遍历整个参数空间的能力更强。 展开更多
关键词 dream算法 DSGE模型 估计精度
下载PDF
Translation Studies from a Cross-Cultural Perspective:Reinventing Subjectivity-A Case Study of English Translation of A Dream of Red Mansions
2
作者 YANG Yin-chuan YANG Zhan 《Journal of Literature and Art Studies》 2024年第4期279-283,共5页
The integration of cross-cultural inquiries into the realm of translation has given rise to a distinct subfield known as cross-cultural translation studies.This approach emphasizes the importance of delving into the c... The integration of cross-cultural inquiries into the realm of translation has given rise to a distinct subfield known as cross-cultural translation studies.This approach emphasizes the importance of delving into the cultural subtleties and the awareness of cultural subjectivity within the translation process.Central to this framework is the concept of reshaping cultural nuances and the subjectivity of culture.This paper introduces three principal translation strategies that emerge from a cross-cultural standpoint:the alienation translation strategy,the‘cannibalism’translation strategy,and the destructive translation strategy.Utilizing the English translation of“Dream of the Red Chamber”as a case study,the paper examines how cultural nuances and cultural subjectivity influence the selection of translation strategies and demonstrates the practical application of cross-cultural research within the translation sphere.Hence,the significance of cross-cultural translation studies lies in its capacity to offer a novel lens through which to view translation studies.It encourages a reevaluation of cultural nuances and subjectivity in translation,which is of profound practical importance for advancing the field of translation studies,enhancing cross-cultural communication,and facilitating the spread of Chinese discourse on the global stage. 展开更多
关键词 CROSS-CULTURAL translation strategies A dream of Red Mansions
下载PDF
Living the Mechanical Dream
3
作者 KEDIR ABDUREZAK NURIYE 《ChinAfrica》 2024年第3期56-56,共1页
Studying in China is not just about academics,it is also about connecting with communities and learning local culture.As a child,I was captivated by machines and their inner workings.I yearned to design contraptions t... Studying in China is not just about academics,it is also about connecting with communities and learning local culture.As a child,I was captivated by machines and their inner workings.I yearned to design contraptions that could solve real-world problems and improve people’s lives.So,when it came time to choose a university,I knew that mechanical engineering was the path for me. 展开更多
关键词 earned connecting dream
下载PDF
Fascination For Planes Young Ghanaian pursues her aviation dream in China
4
作者 GE LIJUN 《ChinAfrica》 2024年第5期54-55,共2页
Every morning at 7 o’clock,Rachael Amoah,a young woman from Ghana,prepares for a new day of challenges and innovations at a leading aerospace company in Shanghai’s Pudong New Area.In March last year,she completed he... Every morning at 7 o’clock,Rachael Amoah,a young woman from Ghana,prepares for a new day of challenges and innovations at a leading aerospace company in Shanghai’s Pudong New Area.In March last year,she completed her studies in the School of Aeronautics and Astronautics at Shanghai Jiao Tong University(SJTU),and fulfilled her ambition to work in this megalopolis. 展开更多
关键词 AVIATION dream pursue
下载PDF
面向高阶思维培育的DREAM教学模式及应用 被引量:1
5
作者 刘涛 黄媛 +1 位作者 蒋燕妮 李轲 《空天预警研究学报》 CSCD 2023年第5期384-386,390,共4页
高阶思维是高阶能力的核心,集中体现了智能时代对人才素质的新要求.针对雷达系统课程中学员高阶思维培育难的问题,围绕“相关”或者“关联”这一高阶思维核心特征,提出了问题驱动的DREAM教学模式,给出了DREAM模式的实施过程.课堂实践表... 高阶思维是高阶能力的核心,集中体现了智能时代对人才素质的新要求.针对雷达系统课程中学员高阶思维培育难的问题,围绕“相关”或者“关联”这一高阶思维核心特征,提出了问题驱动的DREAM教学模式,给出了DREAM模式的实施过程.课堂实践表明,该模式能够有效提升学员的高阶思维能力. 展开更多
关键词 高阶思维 dream教学模式 雷达系统课程
下载PDF
基于Dream Logic的CPU仿真设计与实践
6
作者 李珍香 王家亮 《计算机教育》 2023年第9期192-200,共9页
针对计算机组成原理课程中的重要实验内容“CPU设计”中存在的一些难点问题,提出引入Dream Logic仿真工具,通过CPU总体设计及CPU整机模型机中的运算器设计、指令系统设计与微指令设计示例,阐述基于Dream Logic的硬件基本部件仿真设计和... 针对计算机组成原理课程中的重要实验内容“CPU设计”中存在的一些难点问题,提出引入Dream Logic仿真工具,通过CPU总体设计及CPU整机模型机中的运算器设计、指令系统设计与微指令设计示例,阐述基于Dream Logic的硬件基本部件仿真设计和软件设计方法,并结合MOV、ADD等汇编指令及计算机组成原理实验中的寄存器和算术运算实验,介绍对CPU模型机进行的实验测试,最后说明教学实践效果。 展开更多
关键词 CPU设计 dream Logic CPU仿真 计算机组成原理
下载PDF
My Dream
7
作者 易雨程 张军(指导) 《疯狂英语(双语世界)》 2023年第1期74-75,共2页
Dreams are amazing and important.A dream is just like a light tower,which can light our way to the future.Follow your dream,follow your heart and you will be successful.Almost all the children have their own dreams.Me... Dreams are amazing and important.A dream is just like a light tower,which can light our way to the future.Follow your dream,follow your heart and you will be successful.Almost all the children have their own dreams.Me,too.When I was a small child,I had a lot of dreams,such as being a cook,a teacher and so on.When I was six,I watched the CCTV news for the f irst time.And I also met my idol that always inspires me. 展开更多
关键词 dreamS dream OWN
下载PDF
My Dreams
8
作者 沈一丁 张超(指导) 《中学生英语》 2023年第27期7-7,共1页
I have a pen friend in America.We often send e-mails to each other.While talking about the future,I tell him that I have two dreams.The first one is to be a reporter.If the Olympic Games or the Asian Games are held in... I have a pen friend in America.We often send e-mails to each other.While talking about the future,I tell him that I have two dreams.The first one is to be a reporter.If the Olympic Games or the Asian Games are held in my country again,I will report news about it in English.The second dream is to buy a new car. 展开更多
关键词 dreamS dream AMERICA
下载PDF
Common Prosperity:Making a Dream a Reality
9
作者 ROBERT WALKER 《China Today》 2023年第5期20-22,共3页
Attaining the goal of common prosperity will require everyone to contribute.The whole-process people’s democracy needs to be matched by whole-process social responsibility.
关键词 EVERYONE matched dream
下载PDF
The Thematic Function of Dream Description in My Platonic Sweetheart
10
作者 MA Li 《Journal of Literature and Art Studies》 2023年第2期76-81,共6页
Mark Twain is one of the most famous writers of the nineteenth century,his works have a large number of descriptions of dreams,in Mark Twain’s short story My Platonic Sweetheart,the author describes a dream that cons... Mark Twain is one of the most famous writers of the nineteenth century,his works have a large number of descriptions of dreams,in Mark Twain’s short story My Platonic Sweetheart,the author describes a dream that constantly repeats itself in his life.The dream description in the novel is not only part of the narrative structure of the article,but also expresses the theme of the article,through the close reading of the text,taking dream description as the starting point,the author of this thesis analyzes the dream description in My Platonic Sweetheart,exploring the thematic role of dream description in the novel,and analyzing what the author wants to express and how the author expresses his spiritual pursuit through dream description. 展开更多
关键词 dream description signfier and signified ADULTHOOD CHILDHOOD
下载PDF
Inspiring Stories of Chinese Dream Chasers
11
作者 ZHOU LIN 《China Today》 2023年第11期23-23,共1页
Chasing the Chinese Dream:Four Decades of Following China’s War on Poverty Author:William N.Brown Hardcover,224 pages Published by Springer Nature Singapore Pte Ltd.“China’s targeted poverty alleviation is the worl... Chasing the Chinese Dream:Four Decades of Following China’s War on Poverty Author:William N.Brown Hardcover,224 pages Published by Springer Nature Singapore Pte Ltd.“China’s targeted poverty alleviation is the world’s only way to help the poor and reach the goals of the 2030 Agenda for Sustain-able Development.”That’s the quote on the title page of Chasing the Chinese Dream:Four Decades of Following China’s War on Poverty,coming from UN Secretary-General Antonio Guterres. 展开更多
关键词 DEVELOPMENT CHASE dream
下载PDF
When the Swedish Passion Embraces the Chinese Dream
12
作者 ZHOU LIN 《China Today》 2023年第5期65-67,共3页
A Swedish dream chaser’s life adventure in Beijing.VZZT!Vzzt!It is 4 a.m.,and the vibration of his Amazfit smartwatch rouses Thomas Karlsson from his sleep.It is time to pledge the small sum of money he donates daily... A Swedish dream chaser’s life adventure in Beijing.VZZT!Vzzt!It is 4 a.m.,and the vibration of his Amazfit smartwatch rouses Thomas Karlsson from his sleep.It is time to pledge the small sum of money he donates daily to charity,then head out for his 6-km morning walk,followed by some last-minute lesson preparations before class which starts at 8 a.m. 展开更多
关键词 dream MONEY SWEDISH
下载PDF
My Dream
13
作者 孙亚楠 李朝梅(指导) 《中学生英语》 2023年第17期7-7,共1页
My name is Sun Yanan.I am 13 years old.I am a middle school student.My favorite subjects are math and English.And I like all the subjects,for example,science and history.My hobbies are playing the violin and listening... My name is Sun Yanan.I am 13 years old.I am a middle school student.My favorite subjects are math and English.And I like all the subjects,for example,science and history.My hobbies are playing the violin and listening to the light music.I like playing table tennis. 展开更多
关键词 FAVORITE And dream
下载PDF
CHOGTSO:SMALL GRAPES,BIG DREAMS
14
作者 Liang Xia(文/图) 《China's Tibet》 2023年第6期52-54,共3页
The hot summer ends and Autumn begins.Theonce colorful grapesturn redone byoneas theautumnwindblows through Damedyong Vineyard in Chamdo,Xizang Autonomous Region.
关键词 SUMMER dream GRAPES
下载PDF
My Dream Job in the Future
15
作者 全婷婷 王茂彩(指导) 《中学生英语》 2023年第27期7-7,共1页
Hi,I’m Han Mei.I’m a middle school student.I study in Class 6,Grade 8.I live in the rural area.There are six people in my family.My family live a hard life.In order to improve this situation,I encourage myself to st... Hi,I’m Han Mei.I’m a middle school student.I study in Class 6,Grade 8.I live in the rural area.There are six people in my family.My family live a hard life.In order to improve this situation,I encourage myself to study hard.I have a beautiful dream.I want to be a scientist after I graduate from the university.I am going to make much money and buy a big house for my family.I hope my family will live a happy life. 展开更多
关键词 MONEY dream BEAUTIFUL
下载PDF
《follow a dream》
16
作者 罗密 《流行色》 2019年第6期29-29,共1页
设计说明:本系列作品为女性包袋,灵感来源于梦境中模糊又迷离的感觉。造型中用不同的线条分割以及组合展现其现代简约的设计美感;花卉的造型强调了女性的审美特征;将竹节、植鞣革、金属等材料组合在一块展现不同的特性美。
关键词 FOLLOW a dream 《follow a dream
下载PDF
DREAM算法分析地下水数值模拟不确定性的影响因素 被引量:6
17
作者 杨运 吴吉春 +1 位作者 骆乾坤 吴剑锋 《地质论评》 CAS CSCD 北大核心 2016年第2期353-361,共9页
地下水数值模拟常受到模型不确定性、观测资料不确定性等多种不确定性因素的影响,对这些影响因素进行定量分析十分必要。将差分进化自适应梅特罗波利斯(Differential Evolution Adaptive Metropolis,DREAM)算法与MODFLOW模型结合应用于... 地下水数值模拟常受到模型不确定性、观测资料不确定性等多种不确定性因素的影响,对这些影响因素进行定量分析十分必要。将差分进化自适应梅特罗波利斯(Differential Evolution Adaptive Metropolis,DREAM)算法与MODFLOW模型结合应用于地下水数值模拟不确定性的定量分析。以模型结构概化、水位观测资料误差这两种重要不确定性来源为例,通过一个理想地下水流模型,系统分析两者对模型参数及模型输出结果不确定性的影响。研究结果表明:模型结构概化及水位观测资料误差共同引起了地下水数值模拟的不确定性,但模型结构概化起到了主控作用。模型结构概化合理时,模型参数及模型输出结果的不确定性较小,并随观测资料误差不确定性的增大而增大;模型结构概化不合理时,模型参数及模型输出结果主要受控于模型结构概化带来的影响,且不确定性显著增大;观测资料误差相同情况下,模型结构概化越接近于真实的水文地质条件,模型参数及模型输出结果的不确定性越小。 展开更多
关键词 dream 模型结构概化 观测资料误差 数值模拟 不确定性 地下水
下载PDF
基于Access和Dream Weaver软件的实验室菌种管理系统设计与应用 被引量:4
18
作者 刘畅 黄文睿 +6 位作者 汪永喆 叶萌 方泰惠 刘景晶 罗新龙 范晓旭 曹荣月 《实验技术与管理》 CAS 北大核心 2011年第1期100-103,共4页
利用开放性实验和实践创新训练的教学模式为学生提供实践机会,指导学生参与实验室中的基因工程菌菌种管理。针对实验室构建的工程菌的品种多、数量大、流动快等特点,利用Microsoft Office Access2003和Macromedia Dream Weaver 8.0设计... 利用开放性实验和实践创新训练的教学模式为学生提供实践机会,指导学生参与实验室中的基因工程菌菌种管理。针对实验室构建的工程菌的品种多、数量大、流动快等特点,利用Microsoft Office Access2003和Macromedia Dream Weaver 8.0设计了一种简单易行的菌种管理系统,对现有菌种进行良好的统计和查找。阐述了如何使用Microsoft Office Access 2003和Macromedia Dream Weaver 8.0软件管理实验室菌种,并介绍了该系统的实际应用。 展开更多
关键词 基因工程菌 ACCESS dream Weaver 实验室管理 开放性实验
下载PDF
染料木素磺酸钠对脑缺血再灌注损伤的保护作用及DREAM和PSD95的表达变化 被引量:8
19
作者 钟星明 黄志华 +3 位作者 龚衍 黎晓 李良东 曾靖 《中风与神经疾病杂志》 CAS CSCD 北大核心 2013年第8期697-699,共3页
目的研究染料木素磺酸钠(GSS)对脑缺血再灌注损伤的保护作用,并初步探讨转录抑制子DREAM及突触后致密区蛋白95(PSD95)表达的变化。方法以大鼠大脑中动脉栓塞制作局灶性脑缺血再灌注损伤模型,缺血后10min于舌下静脉给不同剂量的GSS。再灌... 目的研究染料木素磺酸钠(GSS)对脑缺血再灌注损伤的保护作用,并初步探讨转录抑制子DREAM及突触后致密区蛋白95(PSD95)表达的变化。方法以大鼠大脑中动脉栓塞制作局灶性脑缺血再灌注损伤模型,缺血后10min于舌下静脉给不同剂量的GSS。再灌注24h,行神经功能学评分。麻醉后,腹腔静脉取血并分离血清。取脑,一组前脑做TTC染色,测定脑梗死体积;另一组取损伤侧脑组织制成10%的脑组织匀浆,比色法测血清及脑组织匀浆LDH活性;另取半暗带区脑组织,Western blot方法检测脑组织DREAM蛋白的表达。结果模型组大鼠出现明显的脑梗死区及神经功能缺损,血清LDH活性升高(P<0.01),缺血侧脑组织LDH活性降低(P<0.05),皮层半暗带区脑组织DREAM蛋白表达降低(P<0.05),PSD95蛋白表达升高(P<0.001)。与模型组相比,1mg/kg及2mg/kg GSS治疗组脑梗死体积减小;神经功能评分降低(P<0.01,P<0.05),血清LDH活性降低(P<0.05),缺血侧脑组织LDH活性升高(P<0.05);2mg/kg GSS治疗组皮层半暗带区DREAM蛋白表达升高(P<0.01),PSD95蛋白表达降低(P<0.05)。结论 GSS对脑缺血再灌注损伤具有保护作用,其保护机制与GSS提高转录抑制子DREAM的表达,从而抑制NMDA受体介导的兴奋性毒性损伤有关。 展开更多
关键词 染料木素磺酸钠 脑缺血再灌注损伤 dream
下载PDF
基于DREAM算法的含水层渗透系数空间变异特征识别 被引量:4
20
作者 骆乾坤 吴剑锋 +2 位作者 杨运 吴吉春 马淑芬 《南京大学学报(自然科学版)》 CAS CSCD 北大核心 2016年第3期448-455,共8页
采用差分进化自适应Metropolis(DREAM)算法对描述含水层渗透系数空间变异特征的参数进行识别.利用直接傅里叶变换方法产生一组空间结构参数下的若干个渗透系数场实现,借鉴噪声遗传算法(NGA)思想,计算该组空间结构参数对应的贝叶斯后验... 采用差分进化自适应Metropolis(DREAM)算法对描述含水层渗透系数空间变异特征的参数进行识别.利用直接傅里叶变换方法产生一组空间结构参数下的若干个渗透系数场实现,借鉴噪声遗传算法(NGA)思想,计算该组空间结构参数对应的贝叶斯后验概率值,提高DREAM算法求解的效率.算例求解结果表明,DREAM算法能够有效获得含水层渗透系数空间结构参数的后验分布,并可得到对应的一系列渗透系数场,可为含水层参数空间变异性研究提供新的思路. 展开更多
关键词 渗透系数 空间变异特征 噪声遗传算法 dream
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部