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26篇 您的检索式:作者名="Qiru"
    题名 作者 年代 出处 被引量
1Oscillation criteria for second order neutral dynamic equations of Emden-Fowler type with positive and negative coefficients on time scales显示文摘We investigate oscillation of certain second order neutral dynamic equations of Emden-Fowler type with positive and negative coefficients. We use some different techniques and apply Riccati transformation to establish new oscillatory criteria which include two necessary and sufficient conditions. Moreover, we point out that how the power γ plays its role. Some interesting examples are given to illustrate the versatility of our results.DENG XunHuan WANG QiRu ZHOU Zhan 2017Science China Mathematics2017,60,1:8
2Compensation excavation method control for large deformation disaster of mountain soft rock tunnel显示文摘In recent years,the mine tunneling method and the new Austrian tunneling method have been considered the main theories of tunneling approaches in China.It is difficult for the traditional technique to overcome the large deformation problems imposed by complex geological conditions of mountain soft rock tunneling.Hence,the compensation excavation method has been proposed to solve this issue under the consideration that all damage in tunneling originates from the excavation.It uses supportive strategies to counteract the excavation effects successfully.This paper provides an overview of the fundamental ideas of the compensation excavation method,methodologies,and field applications.The scientific validity and feasibility of the compensation excavation method were investigated through the practical engineering study of the Muzhailing and Changning tunnels.Manchao He Qiru Sui Mengnan Li Zhijiao Wang Zhigang Tao 2022International Journal of Mining Science and Technology2022,32,5:6
3Progress Toward Measles Elimination--China,January 2013-June 2019显示文摘What is already known about this topic?China has historically had high measles incidence and many associated deaths.A comprehensive measles elimination plan during 2006-2012 substantially reduced measles incidence;however,a resurgence occurred during 2013-2015.What is added by this report?In China,measles surveillance,outbreak response,research,and program evaluation were used to strengthen routine immunization and target immunization activities for eliminating measles.Measles incidence declined from 31 per million in 2015 to 2.8 in 2018;only one measles-associated death has been reported during 2018-June 2019.What are the implications for public health practice?The World Health Organization-recommended strategy to eliminate measles can be effective,including in large,densely populated countries like China.Chao Ma Lance Rodewald Lixin Hao Qiru Su Yan Zhang Ning Wen Chunxiang Fan Hong Yang Huiming Luo Huaqing Wang James LGoodson Zundong Yin Zijian Feng 2019China CDC weekly2019,1,2:3
4Oscillations of unstable second order nonlinear neutral differential equations显示文摘 1996Journal of Mathematical Research and Exposition1996,16,3:1
5Oscillations of neutral differentialo equations with variable coefficients and several delays 显示文摘Wang Qiru 1990J of the Graduates Sun Yat-sen University ( Natural Science)1990,11,2:1
6内侧缰核胆碱能神经元GABAB受体通过突触前兴奋作用调控动物恐惧记忆显示文摘动物的生存依赖于将预警信号和危险联系起来.对预警信号形成恐惧记忆,以便提前做出反应。当预警信号不再与危险相关时,动物逐渐解除这种联系,消退恐惧记忆,以适应新的生存环境。恐惧记忆消退缺陷被认为和人类创伤后应激障碍(PTSD)等精神障碍有紧密关系。目前关于动物恐惧记忆的研究主要集中在杏仁核及其相关脑区。张举恩 Lubin Tan Yuqi Ren Jingwen Liang Rui Lin Qiru Feng Jingfeng Zhou Fei Hu Jing Ren Chao Wei Tao Yu Yinghua Zhuang Bernhard Bettler Fengchao Wang 罗敏敏 2017科学新闻2017,19,4:1
7Oscination Criteria for first-order Neutral Differential Equations显示文摘QIRU W 2002Appl Math2002,15,:1
8Oscillation of second-order nonlinear neutral dynamic equations on time scales显示文摘ZHANG Shaoyan WANG Qiru 0,,:1
9State of the art review of the large deformation rock bolts显示文摘Rock bolting technique is an important reinforcement measure in the geotechnical engineering practice.New rock bolts have been continuously emerging through the development of rock supporting technology.Complex conditions,such as high crustal stress,extremely soft rock,and strong mining disturbance often occur in the deep mining,resulting in large deformation of the surrounding rock masses.Since the deformation of traditional rock bolts is generally below 200 mm,failure often occurs to the rock bolts because of insufficient deformability.To effectively control the large deformation of surrounding rock masses caused by complex conditions,it is necessary to develop large deformation rock bolts with high constant resistance,also called energy-absorbing bolts.This paper systematically reviews the development of large deformation rock bolts and the structure,energy absorption mechanism,anchorage performance,and mechanical properties of several typical large deformation rock bolts.The advantages and disadvantages of existing large deformation rock bolts are compared and the concept of constant resistance large deformation support is introduced.Qiru Sui Manchao He Pengfei He Min Xia Zhigang Tao 2022Underground Space2022,7,3:1
10Oscillation criteria for second order nonlinear delay dynamic equations on time scales 显示文摘Deng Xunhuan Wang Qiru Zhou Zhan 2015Appl Math Comput2015,269,15:1
11Oscillation criteria for certain even order nonlinear functional differential equations显示文摘Wu Hongwu Wang Qiru Xu Yuantong 2004Dynamic Systems and Applications2004,13,1:1
12Iris Segmentation Based on Matting显示文摘In this paper,we aim to propose a novel and effective iris segmentation method that is robust to uneven light intensity and different kinds of noises such as occlusion by light spots,eyelashes,eyelids,specta-cle-frame,etc.Unlike previous methods,the proposed method makes full use of gray intensities of the iris image.Inspired by the matting algorithm,a premier assumption is made that the foreground and background images of the iris image are both locally smooth.According to the RST algorithm,trimaps are built to provide priori in-formation.Under the assumption and priori,the optimal alpha matte can be obtained by least square loss function.A series of effective post processing methods are applied to the alpha image to obtain a more precise iris seg-mentation.The experiment on CASIA-iris-thousand database shows that the proposed method achieves a much better performance than conventional methods.Our experimental results achieve 20.5%and 26.4%,more than the well-known integro-differential operator and edge detection combined with Hough transform on iris seg-mentation rate respectively.The stability and validity of the proposed method is further demonstrated through the complementary experiments on the challenging iris images.CHEN Qiru WANG Qi SUN Ting WANG Ziyuan 2022Instrumentation2022,9,1:1
13Potassium dehydroandrographolide succinate regulates the MyD88/CDH13 signaling pathway to enhance vascular injuryinduced pathological vascular remodeling显示文摘Pathological vascular remodeling is a hallmark of various vascular diseases.Previous research has established the significance of andrographolide in maintaining gastric vascular homeostasis and its pivotal role in modulating endothelial barrier dysfunction,which leads to pathological vascular remodeling.Potassium dehydroandrographolide succinate(PDA),a derivative of andrographolide,has been clinically utilized in the treatment of inflammatory diseases precipitated by viral infections.This study investigates the potential of PDA in regulating pathological vascular remodeling.The effect of PDA on vascular remodeling was assessed through the complete ligation of the carotid artery in C57BL/6 mice.Experimental approaches,including rat aortic primary smooth muscle cell culture,flow cytometry,bromodeoxyuridine(BrdU)incorporation assay,Boyden chamber cell migration assay,spheroid sprouting assay,and Matrigel-based tube formation assay,were employed to evaluate the influence of PDA on the proliferation and motility of smooth muscle cells(SMCs).Molecular docking simulations and co-immunoprecipitation assays were conducted to examine protein interactions.The results revealed that PDA exacerbates vascular injury-induced pathological remodeling,as evidenced by enhanced neointima formation.PDA treatment significantly increased the proliferation and migration of SMCs.Further mechanistic studies disclosed that PDA upregulated myeloid differentiation factor 88(MyD88)expression in SMCs and interacted with T-cadherin(CDH13).This interaction augmented proliferation,migration,and extracellular matrix deposition,culminating in pathological vascular remodeling.Our findings underscore the critical role of PDA in the regulation of pathological vascular remodeling,mediated through the MyD88/CDH13 signaling pathway.GUO Qiru LI Jiali WANG Zheng WU Xiao JIN Zhong ZHU Song LI Hongfei ZHANG Delai HU Wangming XU Huan YANG Lan SHI Liangqin WANG Yong 2024Chinese Journal of Natural Medicines2024,22,1:0
14高阶非线性中立型微分方程解的渐近性与振动性显示文摘高阶非线性中立型微分方程解的渐近性与振动性...Wang Qiru (Department of Mathematics, Luoyang Teachers College, Luoyang 471022) 1996烟台师范学院学报(自然科学版)1996,12,4:0
15Excavation compensation theory and supplementary technology system for large deformation disasters显示文摘Given the challenges in managing large deformation disasters in energy engineering,traffic tunnel engineering,and slope engineering,the excavation compensation theory has been proposed for large deformation disasters and the supplementary technology system is developed accordingly.This theory is based on the concept that“all destructive behaviors in tunnel engineering originate from excavation.”This paper summarizes the development of the excavation compensation theory in five aspects:the“theory,”“equipment,”“technology,”the design method with large deformation mechanics,and engineering applications.First,the calculation method for compensation force has been developed based on this theory,and a comprehensive large deformation disaster control theory system is formed.Second,a negative Poisson's ratio anchor cable with high preload,large deformation,and super energy absorption characteristics has been independently developed and applied to large deformation disaster control.An intelligent tunnel monitoring and early warning cloud platform system are established for remote monitoring and early warning system of Newton force in landslide geological hazards.Third,the double gradient advance grouting technology,the two-dimensional blasting technology,and the integrated Newton force monitoring--early warning--control technology are developed for different engineering environments.Finally,some applications of this theory in China's energy,traffic tunnels,landslide,and other field projects have been analyzed,which successfully demonstrates the capability of this theory in large deformation disaster control.Manchao He Qiru Sui Zhigang Tao 2023Deep Underground Science and Engineering2023,2,2:0
16Characterization and distribution of novel alleles of the vernalization gene Vrn-A1 in Chinese wheat(Triticum aestivum L.) cultivars显示文摘The ability of wheat to adapt to a wide range of environmental conditions is determined mostly by allelic diversity among genes regulating vernalization requirement.Vrn-1 is a major regulator of this requirement.In this study,two novel alleles of Vrn-A1 were discovered in Chinese cultivars:vrn-A1n was identified in two landraces,Jiunong 2 and Ganchun 16,and Vrn-A1o was detected in Duanhongmangmai.Both novel alleles showed a linked duplication in the promoter region.The common copy of these two alleles was identical to the recessive allele vrn-A1.Compared with the recessive allele vrn-A1,the other copy of vrn-A1n contained a 54-bp deletion in the promoter region and the distinct copy of Vrn-A1o contained an11-bp deletion in the promoter region.In segregating populations in the greenhouse under nonvernalizing(20–25°C)and long-day(16 h light)conditions,plants with the novel vrn-A1n allele did not head earlier than those with the recessive vrn-A1 allele.However,plants that were either homozygous or heterozygous for the novel Vrn-A1o allele headed earlier than those with the recessive vrn-A1 allele.To identify the novel allele with the small-sized product and facilitate screening,a DNA marker for the novel dominant allele Vrn-A1o was designed.Analysis of the novel-allele distribution showed that two cultivars carrying the vrn-A1n allele were dispersed in the northwestern spring wheat zone,and 12 cultivars carrying the dominant Vrn-A1o allele were widely distributed in the northwestern spring wheat zone,Xinjiang winter and spring wheat zone,Yellow and Huai River valley winter wheat zone,and QinghaiTibetan Plateau spring and winter wheat zone.Our study identifies useful germplasm and a DNA marker for wheat breeding.Bo Zhang Yangyang Guo Qiru Fan Ruibo Li Dongsheng Chen Xiaoke Zhang 2023The Crop Journal2023,11,3:0
17白垩纪中期琥珀中保存的一段具有原始羽毛的恐龙尾部显示文摘本文描述了一件保存在白垩纪中期(约9900万年前)缅甸琥珀中的非鸟兽脚类带羽尾部,其中的羽毛结构展现出了羽毛的演化过程。邢立达 Ryan C.Mc Kellar Xing Xu Gang Li Ming Bai W.Scott Persons IV Tetsuto Miyashita Michael J.Benton Jianping Zhang Alexander P.Wolfe Qiru Yi Kuowei Tseng Hao Ran Philip J.Currie 2017科学新闻2017,19,4:0
18Breeding of Yuetang 08776,a New Sugarcane Variety Suitable for Mechanized Production显示文摘[Objectives]To study the breeding of a new sugarcane variety Yuetang 08776 suitable for mechanized production.[Methods]With Yuetang 96-86 as the female parent and Yuetang 99-66 as the male parent,Yuetang 08776 was bred by the Bioengineering Institute of Guangdong Academy of Sciences.It was approved as a non-major crop variety by the Ministry of Agriculture and Rural Affairs in December,2019.Through many years of multi-pilot trials,the characters,traits and disease resistance of Yuetang 08776 were investigated,and the key points of its cultivation technique were summarized.[Results]Yuetang 08776 is characterized by medium maturity,high sugar content,high and stable yield,strong cold and drought resistance,large number of effective stems,strong ratooning ability and lodging resistance.Yuetang 08776 has excellent agronomic traits,and has been identified as moderately resistant to smut and mosaic disease.The average cane yield of Yuetang 08776 was 119.89 t/ha,18.50 t/ha higher than that of CK,an increase of 18.25%.The average sugar yield was 17.15,2.11 t/ha higher than that of CK,an increase of 14.03%.The average sucrose content of Yuetang 08776 in the early period(November to December)was 13.20%,0.71 percentage points lower than that of CK;in the middle and late period(January to March of the following year),the average sucrose content was 15.23%,0.22 percentage points lower than that of CK;and the average sucrose content of the whole period was 14.21%,0.47 percentage points lower than that of CK.[Conclusions]Yuetang 08776 is a sugarcane variety with medium maturity,high sugar,high and stable yield,strong resistance and good ratooning.It is suitable for mechanized seeding,management and harvesting,and suitable for planting and popularizing in most sugarcane production areas of Guangdong,Guangxi and Yunnan.Fangyin PAN Mingfu WEN Lichong PENG Qiru LIANG Qingwen LUO 2021Asian Agricultural Research2021,13,2:0
19Pseudo asymptotically periodic solutions for fractional integro-differential neutral equations显示文摘In this paper, we study the existence and uniqueness of pseudo S-asymptotically ω-periodic mild solutions of class r for fractional integro-differential neutral equations. An example is presented to illustrate the application of the abstract results.Min Yang Qiru Wang 2019Science China Mathematics2019,62,9:0
20捕食和逃跑的下丘脑神经环路显示文摘文章简介研究人员发现,投射到中脑导髓管周围灰质(PAG)的侧下丘脑(LH)的抑制性(GABA)和兴奋性(glutamate)神经元分别控制动物的捕食和逃跑行为。在该研究中,研究人员使用了双病毒搭载策略。Yi Li Jiawei Zeng Juen Zhang Chenyu Yue Weixin Zhong Zhixiang Liu Qiru Feng 罗敏敏 2019科学新闻2019,0,2:0
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