检索结果-南通市图书馆

Population occurrence of the fall armyworm,Spodoptera frugiperda(Lepidoptera:Noctuidae),in the winter season of China

引用

Journal of Integrative Agriculture 2021年第3期20卷 772-782页

作者： YANG Xian-ming song yi-fei SUN Xiao-xu SHEN Xiu-jing WU Qiu-lin ZHANG Hao-wen ZHANG Dan-dan ZHAO Sheng-yuan LIANG Ge-mei WU Kong-ming State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops Fujian Agriculture and Forestry UniversityFuzhou 350002P.R.China College of Plant Protection Southwest UniversityChongqing 400716P.R.China

Fall armyworm(FAW),Spodoptera frugiperda(***),has become an important pest in Chinese agricultural systems since its invasion on 11 December *** its establishment,FAW months in the year-round breeding region have become the main source population migrating to other areas in *** investigations were conducted in tropical and subtropical regions to improve understanding of its year-round breeding area in *** results showed that FAW larval density was significantly correlated with the seasonal temperature of the location *** FAW larvae maintained a high density in the tropical area and were frequently found in sites of the south subtropical region,but were absent from the north subtropical region and the northern part of the central subtropical *** results indicated that FAW can reproduce annually in the tropical and south subtropical regions of China,including Hainan,Taiwan and the southern area of Fujian,Guangdong,Guangxi,Guizhou,and ***,great effort should be made to monitor and control FAW in the year-round breeding region to suppress the population density of this area and to reduce migration of moths into northern parts of *** study clarifies the occurrence area of the pest in winter in China and provides much valuable information for its population forecasting and management.

关键词： fall armyworm temperature year-round breeding region tropical region subtropical region

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

医学图书馆的数字参考咨询服务

引用

临床儿科杂志 2011年第4期29卷 396-397页

作者：宋忆非上海交通大学医学院附属上海儿童医学中心上海200127

参考咨询服务一直是医院图书馆服务工作的核心,随着以计算机、网络为代表的信息技术的迅猛发展,一种新的图书馆服务模式应运而生,即数字参考咨询服务。在一些医院图书馆,数字参考咨询服务正在被悄然应用,但作为一项正式的服务项目,尚未... 详细信息

参考咨询服务一直是医院图书馆服务工作的核心,随着以计算机、网络为代表的信息技术的迅猛发展,一种新的图书馆服务模式应运而生,即数字参考咨询服务。在一些医院图书馆,数字参考咨询服务正在被悄然应用,但作为一项正式的服务项目,尚未被大多数医务工作者所熟知。而医院图书馆数字参考咨询服务的应用和普及,必将使医院的临床、教学、科研达到一个新的水平。所以如何开展和加强这一服务,

关键词：参考咨询服务医学图书馆医院图书馆数医务工作者服务工作信息技术服务模式

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

道德推脱与身份转化:社交网络欺凌中的旁观者效应

引用

湖南大学学报（社会科学版） 2020年第2期34卷 156-160页

作者：莫梅锋宋飞颐湖南大学新闻传播与影视艺术学院湖南长沙410082

社交网络欺凌事件中,旁观者的作用非常关键,其身份正向或负向转化,决定着事件的走向。本文基于旁观者的道德推脱心理,分析其负向身份转化现象。通过剖析身份负向转化背后的原因及产生的负面影响,探索解决社交网络欺凌问题的旁观者路径。

关键词：社交网络欺凌旁观者道德推脱身份转化

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of ATRA Combined with Interferon Alpha-2a on the Animal Model of Bladder tumor

Effect of ATRA Combined with Interferon Alpha-2a on the Anim...

引用

第十三届全国泌尿外科学术会议暨第八届全球华人泌尿外科学术会议

作者： NING song-yi, CUI fei-lun Department of Urology, the First Peoples Hospital of Zhen Jiang, Zhen Jiang 212002

Purpose: To observe the effect of all trans retinoic acid (ATRA) combined with Interferon α-2a on the Wistar rats model of bladder tumor and explore the mechanism of the therapeusis. Methods: 50 female Wistar rats, 6... 详细信息

关键词： Wistar rat MNU bladder tumor ATRA IFN-α-2a apoptosis

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

地方财政体制改革下的碳减排该何去何从?

引用

现代财经（天津财经大学学报） 2019年第8期39卷 71-86页

作者：王娟王伟域宋怡霏武汉工程大学管理学院湖北武汉430073 国家税务总局税务干部进修学院江苏扬州225007

在深化财政体制改革的大背景下,如何调整地方财政支出模式从而实现碳减排的目标成为越来越重要的研究内容。采用1996-2017年省级动态面板数据分别检验了财政支出规模变动与碳减排,财政支出结构变更与碳减排之间的关系。实证结论表明,地... 详细信息

在深化财政体制改革的大背景下,如何调整地方财政支出模式从而实现碳减排的目标成为越来越重要的研究内容。采用1996-2017年省级动态面板数据分别检验了财政支出规模变动与碳减排,财政支出结构变更与碳减排之间的关系。实证结论表明,地方政府财政支出规模的提高会带来人均碳排放量及碳排放强度的增加;非经济性公共支出占财政支出比重的提高导致人均碳排放量及碳排放强度的降低。单项公共支出结构对碳减排的影响具有显著差异性。此外,非经济性公共支出结构的提高只对第二与第三产业的碳减排有显著影响;财政支出规模的提高会带来所有产业人均碳排放量的增加。最后,文章检验发现,财政支出模式对碳排放的影响并没有因为东中西部地区的不同而存在显著性差异;但在直辖市和非直辖市之间存在着显著差异,直辖市内财政支出模式相对有助于碳减排;自治区和非自治区之间也存在显著差异,自治区财政支出模式更不利于碳减排。

关键词：碳减排财政体制改革财政支出模式异质性分析

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An efficient quantum proactive incremental learning algorithm

引用

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 49-57页

作者： Lingxiao Li Jing Li Yanqi song Sujuan Qin Qiaoyan Wen fei Gao State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications School of Cyberspace Security Beijing University of Posts and Telecommunications

In scenarios where a large amount of data needs to be learned, incremental learning can make full use of old knowledge, significantly reduce the computational cost of the overall learning process, and maintain high performance. In this paper, taking the MaxCut problem as our example, we introduce the idea of incremental learning into quantum computing, and propose a Quantum Proactive Incremental Learning algorithm(QPIL). Instead of a one-off training of quantum circuit, QPIL contains a multi-phase training on gradually-increased subgraphs of all vertices, proactively reducing large-scale problems to smaller ones to solve in steps, providing an efficient solution for MaxCut. Specifically, some vertices and corresponding edges are randomly selected for training to obtain optimized parameters of the quantum circuit at first. Then, in each incremental phase, the remaining vertices and corresponding edges are gradually added and the parameters obtained from the previous phase are reused in the parameter initialization of the current phase. We perform experiments on 120 different small-scale graphs, and it shows that QPIL performs superior to prevalent quantum and classical baselines in terms of approximation ratio(AR), time cost, anti-forgetting, and solving stability. In particular, QPIL's AR surpasses 20% of mainstream quantum baselines, and the time cost is less than 1/5 of them. The idea of QPIL is expected to inspire efficient and high-quality solutions in large-scale Max Cut and other combinatorial optimization problems.

关键词： variational quantum algorithm incremental learning multi-phase training MaxCut quantum computing

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Precise gradient separation of nanoparticles using reduced graphene oxide-polyoxomolybdate membranes

引用

Science China Chemistry 2025年第01期 209-216页

作者： yixin Yang Wanlei Zhao Ruoxuan Zheng Hongqiang Li Wei Chen Yu-fei song State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Quzhou Institute for Innovation in Resource Chemical Engineering

The purification and size sieving of nanoparticles （NPs） represents a significant scientific ***,the r GO-polyoxometalates (POMs=PMo12,Mo132and Mo368) membranes were fabricated successfully via a simple and scalable POMsassisted in-situ photoreduction *** the mass ratio of r GO to PMo12was 1:30,the resultant r GO-PMo12membranes with highly ordered and uniform nanochannels of 1.0 nm can be obtained,which showed an accurate carbon quantum dots（CQDs） separation with a cut-off size approximately 1.0 *** increase of the size of the interlayered POMs from PMo12（1.0 nm）,{Mo132}（2.9 nm） to{Mo368}（3.8 nm）,the resultant r GO-PMo12,r GO-Mo132and r GO-Mo368exhibited precise gradient separation of CQDs and Au nanoparticles by size exclusion *** results pave a promising way to construct new twodimensional （2D） membranes for highly efficient size-selective separation.

关键词：

来源：

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

一种图像相关匹配算法的改进及实现

引用

光电技术应用 2013年第4期28卷 61-64页

作者：宋刈非郑丽东北电子技术研究所辽宁锦州121000

序贯相似性检测算法(SSDA)是针对传统模板匹配算法提出的一种高效的图像匹配算法,对SSDA算法进行改进,利用序列来代替固定阈值,采用隔点采样以及粗匹配和精匹配相结合,进一步提高了计算效率。并在此基础上,采用Visual C++6.0对该算法进... 详细信息

序贯相似性检测算法(SSDA)是针对传统模板匹配算法提出的一种高效的图像匹配算法,对SSDA算法进行改进,利用序列来代替固定阈值,采用隔点采样以及粗匹配和精匹配相结合,进一步提高了计算效率。并在此基础上,采用Visual C++6.0对该算法进行了编程实现。实验证明,该算法比传统的SSDA算法计算速度更快、匹配误差更小。

关键词： VisualC++ SSDA 序贯相似性检测算法图像匹配

来源：

维普期刊数据库

同方期刊数据库评论