检索结果-南通市图书馆

Relative contribution of genetic and environmental factors to determination of wing morphs of the brown planthopper Nilaparvatalugens

引用

Insect Science 2023年第1期30卷 208-220页

作者： Chao Zhang Meng-Sha Mao xiang-Dong Liu Department of Entomology Nanjing Agricultural UniversityNanjingChina

Wing dimorphism is a fascinating feature of the ability of insects to adapt to environments.The brown planthopper(BPH)Nilaparvata lugens,a serious pest of rice,can switch between the long-and short-winged morphs.It has been known that environmental factors can affect the wing morph of BPH.However,it is still unclear whether the effect of environment is dependent on BPH genetic backgrounds or not.In the present study,we established the pure-bred lineages of short-and long-winged BPHs via multigenerational selection,and we found that survival and fecundity were similar between these 2 lineages.Wing morphs of the pure-bred lineages were almost fully dependent on genetics,but independent of the environmental factors,nymphal density and rice plant stage,2 key factors affecting BPH wing morphs.In the unselected BPH population,short-and longwinged morphs were produced depending on those 2 environmental factors,indicating the contribution of environment to wing morph.In the wing-selected lineages,4 developmental regulated genes of wing,NllnRI,NllnR2,NIAkt,and NIFoxo were expressed stably in the short-winged adults,but almost silenced in the long-winged adults.However,all these genes were expressed normally with a similar level in both the short-and long-winged adults in an unselected population except NlFoxo.The pure-bred lineages of long-and short-winged morphs exhibited different expression patterns of wing development-regulated genes,suggesting the genetic determination of wing morphs.Effects of environmental factors on wing morphs occurred only in the genetic mix population.

关键词： environmental effect gene expression genetic determination Nilaparvata lugens pure-bred lineage wing dimorphism

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A.S.Convergence Rate and L^(p)-Convergence of Bisexual Branching Processes in a Random Environment and Varying Environment

引用

Acta Mathematicae Applicatae Sinica 2023年第2期39卷 337-353页

作者： Sheng XIAO xiang-Dong Liu Ying-qiu LI School of economics Jinan UniversityGuangzhou510632China School of Mathematics and Statistics Changsha University of Science and TechnologyChangsha 410004China Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering Changsha University of Science and TechnologyChangsha 410004China

Let(Z_(n))be a supercritical bisexual branching process in a random environmentξ.We study the almost sure(a.s.)convergence rate of the submartingale W_(n)=Z_(n)/In to its limit W,where(In)is an usually used norming sequence.We prove that under a moment condition of order p∈(1,2),W-W_(n)=o(e^(-na))a.***.for some a>0 that we find explicitly;assuming the logarithmic moment condition holds,we haveW-W_(n)=o(n^(-α))a.s..In order to obtain these results,we provide the L^(p)-convergence of(W_(n));similar conclusions hold for a bisexual branching process in a varying environment.

关键词： bisexual branching process convergence rate varying environment random environment

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

A foot structure study of new arch flexibility grading system based on threedimensional arch volume

引用

Chinese Journal of Traumatology 2023年第6期26卷 329-333页

作者： Jun liu Miao Deng Wei Wang xiang-Dong Liu Lun Tao Hong-Yi xiang Yan Xiong Department of Orthopedics Daping HospitalArmy Medical UniversityChongqing400042China The 5th Outpatient Clinic Western Theater General HospitalChengdu610000China Department of Orthopedics Armed Police Hospital of ChongqingChongqing400042China Institute for Traffic Medicine Daping HospitalArmy Medical UniversityChongqing400042China

Purpose:Different arch structures may cause different foot function injuries.In the past,the arch structure and flexibility of the foot were often defined by the height of the arch,and there was no three-dimensional(3D)structure classification method.In order to form a more complete 3D description,we propose a new classification system of arch volume flexibility(AVF),and then use this new classification system to investigate the relationship between the AVF and arch index(AI),and the arch height flexibility(AHF)and AI,respectively.Methods:It is proposed to recruit 180 young male adults for the test.We obtained arch volume and AI through 3D scanning and obtained the navicular height through manual measurement.Based on these data,we calculated the AHF and the AVF.Using the quintile method,these arches are divided into very stiff,stiff,neutral,flexible,and very flexible.According to AI value,all arches were divided into cavus,rectus,and planus.The distribution of AVF was compared usingχ^(2)goodness of fit test.The spearman correlation test was used to compare the AHF and AVF.A p<0.05 indicates that the difference is statistically significant.Results:All participants'plantar data was obtained through 3D scanning,but only 159 of them were complete,so only 318 feet had valid data.The left AHF is(21.23±12.91)mm/kN,and the right AHF is(21.71±12.69)mm/kN.The AVF of the left foot arch is(207.35±118.28)mm^(3)/kg,while the right one is(203.00±117.92)mm^(3)/kg,and the total AVF of the arch was(205.17±117.94)mm^(3)/kg.There was no statistical difference in the AVF between the left and right feet for the same participant(n=159,p=0.654).In cavus,the percentage of arch with AVF is 21.4%(very stiff),21.4%(stiff),14.3%(neutral),7.1%(flexible),and 35.7%(very flexible).In rectus,the percentage of arch with AVF is 23.9%(very stiff),19.6%(stiff),14.7%(neutral),24.5%(flexible),and 17.2%(very flexible).In planus,the percentage of arch with AVF is 14.9%(very stiff),20.6%(stiff),27.0%(neutral),16.3%(flexible),and 21.3%(very flexible).Moreo

关键词： Arch height flexibility Arch volume flexibility Classification Arch volume Three-dimensional Arch index

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

The role of Rho GTPase family in cochlear hair cells and hearing

引用

Neural Regeneration Research 2023年第10期18卷 2167-2172页

作者： Yu-Bei Dai xiang Gao dong liu Jie Gong School of Life Science Nantong Laboratory of Development and DiseasesKey Laboratory of Neuroregeneration of Jiangsu and Ministry of EducationCo-innovation Center of NeuroregenerationNantong UniversityNantongJiangsu ProvinceChina

Rho GTPases are essential regulators of the actin cytoskeleton.They are involved in various physiological and biochemical processes such as the regulation of cytoskeleton dynamics,development,proliferation,survival,and regeneration.During the development of cochlear hair cells,Rho GTPases are activated by various extracellular signals through membrane receptors to further stimulate multiple downstream effectors.Specifically,RhoA,Cdc42,and Rac1,members of the classical subfamily of the Rho GTPase family,regulate the development and maintenance of cilia by inducing the polymerization of actin monomers and stabilizing actin filaments.In addition,they also regulate the normal morphology orientation of ciliary bundles in auditory hair cells,which is an important element of cell polarity regulation.Moreover,the actin-related pathways mediated by RhoA,Cdc42,and Rac1 also play a role in the motility of outer hair cells,indicating that the function of Rho GTPases is crucial in the highly polar auditory sensory system.In this review,we focus on the expression of RhoA,Cdc42,and Rac1 in cochlear hair cells and how these small molecules participate in ciliary bundle morphogenesis and cochlear hair cell movement.We also discuss the progress of current research investigating the use of these small molecules as drug targets for deafness treatment.

关键词： actin assembly auditory sensory neurons cell polarity cell proliferation electromotility hair cell hearing loss morphogenesis Rho GTPases stereocilia

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

Seasonal response of nitrogen exchange fluxes to crab disturbance at sediment-water interface in coastal tidal wetlands

引用

Water Science and Engineering 2024年第2期17卷 129-138页

作者： Guo-fen Hua Shang-qing liu xiang-Dong Liu Jin-li Li Yue Fang Wen-ting Xie xiang Xu College of Water Conservancy and Hydroelectric Power Hohai UniversityNanjing 210098China College of Renewable Energy Hohai UniversityNanjing 210098China

Coastal wetlands are hotspots for nitrogen(N)cycling,and crab burrowing is known to transform N in intertidal marsh soils.However,the underlying mechanisms remain unclear.This study conducted field experiments and used indoor control test devices to investigate the seasonal response of nitrogen to crab disturbance at the sediment-water interface in coastal tidal flat wetlands.The results showed that crab disturbance exhibited significant seasonality with large seasonal differences in cave density and depth.Due to crab disturbance,nitrogen fuxes at the sediment-water interface were much greater in the box with crabs than in the box without crabs.In summer,NH-N showed a positive flux from the sediment to the overlying water,but NO2-N and NOg-N showed positive fluxes from the sediment to the overlying water only in early stages.In winter,NH-N showed a positive flux from the sediment to the overlying water,but NO-N and NO,-N both exhibited positive and negative fluxes.These results indicated that the presence of crab burrows can cause the aerobic layer to move downward by approximately 8-15 cm in summer and directly promote nitrification at the sediment surface.

关键词： Coastal tidal flat wetland Crab disturbance Nitrogen flux Nitrification Denitrification Sediment-water interface

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Extension of the rotating dipole model with oblateness of both primaries

引用

Research in Astronomy and Astrophysics 2017年第1期17卷 11-20页

作者： xiang-Yuan Zeng xiang-Dong Liu Jun-Feng Li School of Automation Beijing Institute of Technology School of Aerospace Engineering Tsinghua University

A rotating mass dipole can be used to understand the dynamical behaviors around elongated asteroids as well as binary asteroids. In this paper an improved dipole model with oblateness in both primaries is investigated. The dynamical equations of a particle around the improved model are first derived by introducing the oblateness coefficients. The characteristic equations of equilibrium points are obtained, resulting in the emergence of new equilibria in the equatorial plane and the plane xoz de- pending on the shape of the spheroid. Numerical simulations are performed to illustrate the distribution of these equilibrium points. Significant influence from the oblateness of the primaries on the topological structure is also analyzed via zero-velocity curves.

关键词： celestial mechanics - minor planets, asteroids general - methods numerical

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

On the torque exerted by a warped, magnetically threaded accretion disk

引用

Research in Astronomy and Astrophysics 2021年第3期21卷 15-20页

作者： Chang liu xiang-dong Li School of Astronomy and Space Science Nanjing UniversityNanjing 210023China Key laboratory of Modern Astronomy and Astrophysics(Nanjing University) Ministry of EducationNanjing 210023

Most astrophysical accretion disks are likely to be warped.In X-ray binaries,the spin evolution of an accreting neutron star is critically dependent on the interaction between the neutron star magnetic field and the accretion disk.There have been extensive investigations on the accretion torque exerted by a coplanar disk that is magnetically threaded by the magnetic field lines from the neutron stars,but relevant works on warped/tilted accretion disks are still lacking.In this paper we develop a simplified twocomponent model,in which the disk is comprised of an inner coplanar part and an outer,tilted part.Based on standard assumption on the formation and evolution of the toroidal magnetic field component,we derive the dimensionless torque and show that a warped/titled disk is more likely to spin up the neutron star compared with a coplanar disk.We also discuss the possible influence of various initial parameters on the torque.

关键词： accretion accretion disks magnetic field X-ray binaries

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

Acceptor-acceptor-type Organoboron Conjugated Polymers:Effect of Backbone Configuration on Thermoelectric Performance

引用

Chinese Journal of Polymer Science 2023年第1期41卷 108-116页

作者： Chang-Shuai dong Bin Meng Jun liu Li-xiang Wang State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China University of Science and Technology of China Hefei230026China

The development of n-type polymer thermoelectrics lags far behind that of p-type ones in view of material diversity and performance.New structural insights into the thermoelectric performance are needed for efficient n-type polymer thermoelectric materials.Herein,we developed three acceptor-acceptor type organoboron polymers and investigated the effect of backbone configuration on thermoelectric performance.The three polymers are designed based on double B←N bridged bipyridine(BNBP)unit with monomeric thieno[3,4-c]pyrrole-4,6-dione(TPD),TPD dimer and TPD trimer as the copolymerizing units,respectively.The three polymers show similar low LUMO energy levels but different backbone configuration.Compared with the wavy backbone configuration,the pseudo-straight backbone configuration imparts the polymer with much enhanced crystallinity and electron mobility.As a result,after n-doping,the polymer with pseudo-straight configuration shows much higher electronic conductivity and power factor.We think these findings could serve as important guidelines for molecular design toward efficient n-type polymer thermoelectric materials.

关键词： Organoboron polymers Acceptor-acceptor type conjugated polymers n-Type polymer thermoelectrics n-Doping

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

Macular laser photocoagulation with or without intravitreal triamcinolone pretreatment for diabetic macular edema： a result from five randomized controlled trials

引用

International Journal of Ophthalmology(English edition) 2016年第1期9卷 132-138页

作者： xiang-Dong Liu Xiao-dong Zhou Zhi Wang Yong-Ming Shen Department of Ophthalmology Affiliated Jinshan HospitalFudan University Shanghai 201508 China

AIM：To assess possible benefits of intravitreal triamcinolone acetonide（IVTA）injection as pretreatment for macular laser photocoagulation（MLP）in patients with diabetic macular edema（DME）.·METHODS：Published randomized controlled trials（RCTs）concerning MLP with or without IVTA pretreatment for DME were retrieved from databases CNKI,Medline,EMbase,Web of Science,and the Cochrane Library.A Meta-analysis on eligible studies was conducted using Rev Man 5.0 software.Two investigators independently assessed the quality of the trials and extracted data.Main outcome measures included the change in best-corrected visual acuity（BCVA）,difference in central macular thickness（CMT）and adverse events reporting in particular elevated intraocular pressure within the follow-up period.The results were pooled using weight mean difference（WMD）or odds risk（OR）with their corresponding 95%confidence intervals（CI）.A fixed-or random-effect model was employed depending on the heterogeneity of the inclusion trials.·R ESULTS：Finally,five independent RCTs were identified and used for comparing MLP with IVTA pretreatment（131 eyes）with MLP alone（133 eyes,control group）.The overall study quality was relatively higher according to the modified Jadad scale.The Metaanalysis showed that MLP with IVTA pretreatment significantly reduced CMT at one,three and six months（=0.002,0.0003 and 0.04,respectively）,compared with MLP alone.The IVTA pretreatment group showed statistically significant improvements in BCVA at the one-month follow up as compared with the control group（=0.03）.At three-and six-month follow up,there was a beneficial trend towards improving visual acuity in the IVTA pretreatment group without statistical significance between groups（=0.06 and 0.20,respectively）.The incidence of elevation of intraocular pressure was significantly higher in the IVTA pretreatment group than in the control group（〈0.0001）.No evidence of publication bias was present according to Begg’s test and Egger’s test.There was a low level of heterogeneity in the included s

关键词： photocoagulation intravitreal injection triamcinolone acetonide diabetic macular edema

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Competition on robust deep learning

引用

National Science Review 2023年第6期10卷 13-15页

作者： Yinpeng dong Chang liu Wenzhao xiang Hang Su Jun Zhu Department of Computer Science and Technology Institute for AI Tsinghua-Bosch Joint ML Center THBI Lab BNRist Center Tsinghua University Institute of Image Communication and Networks Engineering in the Department of Electronic Engineering (EE) Shanghai Jiao Tong University Key Laboratory of Intelligent Information Processing of Chinese Academy of Sciences (CAS) Institute of Computing Technology CAS Peng Cheng Laboratory Pazhou Laboratory (Huangpu)

PROBLEM In recent years,the rapid development of artificial intelligence (AI) technology,especially machine learning and deep learning, is profoundly changing human production and lifestyle.In various fields,such as robotics,face recognition,autonomous driving and healthcare,AI is playing an important role.However,although AI is promoting the technological revolution and industrial progress,its security risks are often overlooked.Previous studies have found that the wellperforming deep learning models are extremely vulnerable to adversarial examples [1-3].The adversarial examples are crafted by applying small,humanimperceptible perturbations to natural examples,but can mislead deep learning models to make wrong predictions.The vulnerability of deep learning models to adversarial examples can raise security and safety threats to various realworld applications.

关键词： robustness adversarial example adversarial training deep learning

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：