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Relative fitness of susceptible and Cry1A.105/Cry2Ab2-single-/dual-protein-resistant Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae) on non-Bt diet and a diet containing a low concentration of two proteins

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Insect Science 2023年第2期30卷 398-410页

作者： Shucong Lin Graham Head Paula Price ying niu Fangneng Huang Department of Entomology Louisiana State University Agricultural CenterBaton RougeLouisianaUSA Bayer Crop Science ChesterfieldMissouriUSA

Helicoverpa zea(Boddie)is a destructive agricultural pest species that is targeted by both Bacillus thuringiensis(Bt)maize and cotton in the United ***1A.105 and Cry2Ab2 are two Bt proteins expressed in a widely planted maize event MON *** this study,two tests(Test-Ⅰ and Test-Ⅱ)were conducted to evaluate the relative fitness of Bt-susceptible and-resistant *** on non-Bt diet(Test-Ⅰ and Test-Ⅱ)and a diet containing a mix of Cry1A.105 and Cry2Ab2 at a low concentration(Test-Ⅱ only).Insect populations evaluated in Test-Ⅰ were two Bt-susceptible strains and three Bt-resistant strains(a single-protein Cry1A.105-,a single-protein Cry2Ab2-,and a dual-protein Cry1A.105/Cry2Ab2-resistant strains).Test-Ⅱ analyzed the same two susceptible strains,three backcrossed-and-reselected Cry1A.105/Cry2Ab2-single-/dual-protein-resistant strains,and three F1 heterozygous *** of life table parameters showed that neither the single-nor dual-protein Cry1A.105/Cry2Ab2 resistance in *** was associated with fitness costs under the test *** single Cry protein resistances at a concentration of a mix of Cry1A.105 and Cry2Ab2 that resulted in a zero net reproductive rate for the two susceptible strains were functionally incomplete recessive or codominant,and the dual-protein resistance was completely *** lack of fitness costs could be a factor contributing to the rapid revolution of resistance to the Cry proteins in this *** generated from this study should aid our understanding of Cry protein resistance evolution and help in refining IRM programs for ***.

关键词： resistance management Cry1A.105 Cry2Ab2 fitness costs Helicoverpa zea low dose effect

设施果树栽培学本科教学课程思政的建设——以新疆农业大学为例

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安徽农业科学 2024年第12期52卷 280-282页

作者：李雯雯曼苏尔·那斯尔牛莹莹贾凯新疆农业大学园艺学院新疆乌鲁木齐830052

课程思政作为科学性和实践性相兼备的理论思想,秉承“隐形教育,立德树人”的宗旨,在马克思主义等科学理论的指导下传递思政知识,最终达到思政育人的效果。设施果树栽培学是新疆农业大学园艺学院设施农业科学与工程专业的主要核心课程之... 详细信息

课程思政作为科学性和实践性相兼备的理论思想,秉承“隐形教育,立德树人”的宗旨,在马克思主义等科学理论的指导下传递思政知识,最终达到思政育人的效果。设施果树栽培学是新疆农业大学园艺学院设施农业科学与工程专业的主要核心课程之一。从修订课程教学大纲、改进教学方法以及课程思政教学评价体系构建3个环节进行了课程思政教学的探索,为推进地方高校设施农业科学与工程专业课程思政教育提供参考。

关键词：设施果树栽培学本科教学课程思政

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基于人工智能自动分析技术的视网膜血管形态参数测量及特征分析

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中华实验眼科杂志 2024年第1期42卷 38-46页

作者：史绪晗董力邵蕾凌赛广董洲牛莹张瑞恒周文达魏文斌首都医科大学附属北京同仁医院、北京同仁眼科中心、眼内肿瘤诊治研究北京市重点实验室、北京市眼科学与视觉科学重点实验室、医学人工智能研究与验证工信部重点实验室北京100730 依未科技(北京)有限公司北京100085

目的基于人工智能技术对视网膜血管形态学参数进行全自动定量测量,分析我国北方50岁以上人群视网膜血管参数及分布特征。方法采用横断面研究方法,纳入2011年1月至2021年12月就诊于北京同仁医院的50岁以上无眼底病的患者1842例,对纳入的... 详细信息

目的基于人工智能技术对视网膜血管形态学参数进行全自动定量测量,分析我国北方50岁以上人群视网膜血管参数及分布特征。方法采用横断面研究方法,纳入2011年1月至2021年12月就诊于北京同仁医院的50岁以上无眼底病的患者1842例,对纳入的受试者进行标准化问卷调查、抽血和眼科检查;收集各受试者任意一眼以视盘为中心的彩色眼底照片,采用基于深度学习的语义分割网络ResNet101-Unet构建血管分割模型,进行全自动视网膜血管参数定量测量,主要测量指标包括视网膜血管分支夹角、血管分形维数、血管平均管径和血管平均弯曲度。比较不同性别间各视网膜参数的差异。采用多元线性回归分析法分析最佳矫正视力、眼压、眼轴长度等眼部因素和性别、年龄、高血压、糖尿病、心血管疾病等全身因素是否是各视网膜血管参数的影响因素。结果模型对于血管分割和视盘分割的准确度均高于0.95。1842例受试者血管分支夹角为(51.023±11.623)°;血管分形维数为1.573(1.542,1.592);血管平均管径为64.124(60.814,69.053)μm;血管平均弯曲度为(0.001062±0.000165)°。男性血管分支夹角大于女性,血管平均管径和血管平均弯曲度小于女性,差异均有统计学意义(均P<0.05)。全身因素多元线性回归分析结果显示,患有心血管疾病的人群较无心血管疾病的人群血管平均管径增大1.142μm(B=1.142,P=0.029,95%CI:0.116~2.167);血管平均弯曲度与高血压(B=3.053×10^(-5),P=0.002,95%CI:1.167×10^(-5)~4.934×10^(-5))和饮酒量(B=1.036×10^(-5),P=0.014,95%CI:0.211×10^(-5)~1.860×10^(-5))呈正相关,与高脂血症呈负相关(B=-2.422×10^(-5),P=0.015,95%CI:-4.382×10^(-5)~-0.462×10^(-5))。眼部因素多元线性回归分析结果显示,眼轴长度每增加1 mm,血管分形维数减小0.004(B=-0.004,P<0.001,95%CI:-0.006~-0.002),血管平均管径减小0.266μm(B=-0.266,P=0.037,95%CI:-0.516~-0.016),血管平均弯曲度减小-2.45×10^(-5)°(B=-2.45×10^(-5),P<0.001,95%CI:-0.313×10^(-5)~-0.177×10^(-5))。BCVA每增加1.0,血管分支夹角增大3.992°(B=3.992,P=0.004,95%CI:1.283~6.702),血管分形维数增大0.090(B=0.090,P<0.001,95%CI:0.078~0.102),血管平均管径减小14.813μm(B=-14.813,P<0.001,95%CI:-16.474~-13.153)。结论成功构建视网膜血管分割模型。视网膜血管参数与性别、年龄、系统性疾病和眼部因素存在关联。

关键词：视网膜血管眼底照相形态学参数人工智能

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云资源池异构SDN架构演进研究

电信工程技术与标准化 2024年第1期37卷 18-25页

作者：牛红韦华赵晖文丁国强牛瑛霞魏逸哲中移(苏州)软件技术有限公司苏州215000 中国移动通信集团设计院有限公司北京100080

云资源池通过SDN技术实现网络编排自动化、规模化和智能化,不同SDN在技术架构、产品适配和性能基线等方面差异较大且难以兼容。在多SDN场景下,部分SDN架构在可扩展性、OU架构解耦和版本迭代效率等方面存在问题。随着云业务发展,不同SDN... 详细信息

云资源池通过SDN技术实现网络编排自动化、规模化和智能化,不同SDN在技术架构、产品适配和性能基线等方面差异较大且难以兼容。在多SDN场景下,部分SDN架构在可扩展性、OU架构解耦和版本迭代效率等方面存在问题。随着云业务发展,不同SDN间业务互联互通需求逐步凸显。本文通过分析云资源池的几种SDN技术,以及异构SDN环境下要解决的关键问题,提出基于不同SDN的异构AZ建设方案,包括架构方案、业务方案和跨AZ迁移方案,并最终实现SDN架构融合统一。

关键词：云计算 SDN 异构超级控制器

体空位缺陷对氧化铝二次电子发射特性的影响分析

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物理学报 2024年第15期73卷 218-224页

作者：张建威牛莹闫润圻张荣奇曹猛李永东刘纯亮张嘉伟西安理工大学电气工程学院西安710048 西安交通大学电子科学与工程学院物理电子与器件教育部重点实验室西安710049

基于第一性原理和蒙特卡罗模拟方法,系统地研究了氧化铝晶体内部O空位缺陷和Al空位缺陷对二次电子发射特性的影响.密度泛函计算结果表明,空位缺陷会导致能带结构发生改变,其中Al空位缺陷的存在使得禁带宽度变窄,费米能级降低至价带内部... 详细信息

基于第一性原理和蒙特卡罗模拟方法,系统地研究了氧化铝晶体内部O空位缺陷和Al空位缺陷对二次电子发射特性的影响.密度泛函计算结果表明,空位缺陷会导致能带结构发生改变,其中Al空位缺陷的存在使得禁带宽度变窄,费米能级降低至价带内部.在此基础之上,获得了不同晶体结构下的弹性和非弹性平均自由程.氧化铝中存在Al空位缺陷时的弹性平均自由程最大,而存在O空位缺陷时的非弹性平均自由程最大.为了分析不同缺陷浓度下的二次电子发射特性,对已有蒙特卡罗模拟算法进一步优化.模拟结果表明,随着O空位和Al空位缺陷占比的增加,最大二次电子发射系数随之而下降.相比于Al空位缺陷,相同缺陷占比下O空位缺陷导致二次电子发射系数降低更多.

关键词：二次电子空位缺陷蒙特卡罗密度泛函

Selection,effective dominance,and completeness of Cry1A.105/Cry2Ab2 dual-protein resistance in Helicoverpa zea(Boddie)(Lepidoptera:Noctuidae)

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Journal of Integrative Agriculture 2023年第7期22卷 2151-2161页

作者： Tiago SILVA ying niu Tyler TOWLES Sebe BROWN Graham PHEAD Wade WALKER Fangneng HUANG Department of Entomology Louisiana State University Agricultural CenterBaton RougeLouisiana 70817USA Macon Ridge Research Station Louisiana State University Agricultural CenterWinnsboroLouisiana 71295USA Dean Research Station Louisiana State University Agricultural CenterAlexandriaLouisiana 71302USA Bayer Crop Science ChesterfieldMissouri 63017USA

In the U.S.,Helicoverpa zea(Boddie)is a major pest targeted by both transgenic maize and cotton expressing Bacillus thuringiensis(Bt)*** of insect to Bt maize and cotton containing cry1A and cry2A genes has widely occurred in the *** this study,two trials were performed to investigate larval survival and development of a Cry1A.105/Cry2Ab2 dual-protein resistant(VT2P-RR),a susceptible,and an F1 heterozygous(VT2P-RS)populations of *** on ears of nine Bt and three non-Bt maize *** Bt maize hybrids evaluated represent five common pyramided traits expressing two or three of the Cry1A.105,Cry1Ab,Cry1F,Cry2Ab2,and Vip3Aa20 *** the laboratory,neonates of the three *** populations were inoculated on silks of ears collected from maize at R1-R2 plant stages;and larval survivorship was checked 10 d after neonate *** three insect populations survived normally on non-Bt maize *** numbers of VT2P-RR and VT2P-RS survived on ears of Cry1A.105/Cry2Ab2 maize,while all larvae of the three populations died or could not develop on ears of Vip3Aa20-expressing *** results demonstrated that the dual-protein resistant *** was not cross-resistant to Vip3Aa20-expressing maize,and thus traits with vip3Aa20 gene should be effective to manage Cry1A.105/Cry2Ab2-resistant *** resistance in VT2P-RR was determined to be incomplete on Cry1A.105/Cry2Ab2 *** effective dominance levels varied greatly,from recessive to incompletely dominant,depending on maize hybrids and trials,suggesting that proper selection of maize hybrids could be important for mitigating the Cry1A.105/Cry2Ab2 *** data generated should aid in modeling multiple-protein Bt resistance in ***.

关键词： corn earworm Cry1A/Cry2A effective dominance incomplete resistance Bt maize resistance management

A study on carbon emission calculation in operation stage of residential buildings based on micro electricity usage behavior:Three case studies in China

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Building Simulation 2024年第1期17卷 147-164页

作者： Menghan niu ying Ji Miao Zhao Jiefan Gu Aonan Li Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology Beijing University of TechnologyBeijing 100124China College of Architecture and Urban Planning Tongji UniversityShanghai 201804China The Bartlett School of Architecture University College LondonWC1E 6BTUK

Along with the improvement of social productivity and living standard,residential buildings generate a growing portion of carbon emissions,especially during the operation ***,energy use behaviors are usually ignored in carbon emission *** study focuses on calculating carbon emissions during the operation stage for residential buildings based on the characteristics of energy use behaviors in different ***,we investigated energy use behaviors in dwellings across three cities in China:Xi'an,Shanghai and ***,we established calibrated carbon emission models and optimization models with different green building measures for residential *** results of this research reveal a significant disparity between the energy usage habits of residents in different climate *** carbon emissions of residential electricity bills in Xi'an,Shanghai and Fuzhou are 13.6 kgCO_(2)/(m^(2)·a)(excluding central heating),29.3 kgCO_(2)/(m^(2)·a)and 17.2 kgCO_(2)/(m^(2)·a),*** carbon emissions account for 32.2%-64.1% of the *** comparison to the model based on internal standard setting,the accuracy of the models using actual internal has improved by 25.9%-37.4%.The three-star green building methods have the highest carbon reduction rate among different star buildings,the emission reduction rates are around 30%.This study's findings are useful for carbon emission calculation and green building design of residential buildings in the future.

关键词： residential building energy usage behavior energy simulation carbon emissions

The central limit theorem and chaos

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Applied Mathematics(A Journal of Chinese Universities) 2009年第2期24卷 230-236页

作者： niu ying-xuan Department of Mathematics and Physics Wanxi College Lu＇an 237012 China

Let X be a compact metric space studies some relationships between stochastic and f ： X→ X be a continuous map. This paper and topological properties of dynamical systems. It is shown that if f satisfies the central limit theorem, then f is topologically ergodic and / is sensitively dependent on initial conditions if and only if / is neither minimal nor equicontinuous.

关键词： the central limit theorem topologically ergodic sensitive dependence on initial conditions min- imal equicontinuous

IRS Assisted UAV Communications against Proactive Eavesdropping in Mobile Edge Computing Networks

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工程与科学中的计算机建模(英文) 2024年第1期138卷 885-902页

作者： ying Zhang Weiming niu Leibing Yan School of Electronic Information Engineering Henan Institute of TechnologyXinxiang453003China Houde College Henan Institute of TechnologyXinxiang453003China

In this paper,we consider mobile edge computing(MEC)networks against proactive *** maximize the transmission rate,IRS assisted UAV communications are *** take the joint design of the trajectory of UAV,the transmitting beamforming of users,and the phase shift matrix of *** original problem is strong non-convex and difficult to *** first propose two basic modes of the proactive eavesdropper,and obtain the closed-form solution for the boundary conditions of the two *** we transform the original problem into an equivalent one and propose an alternating optimization(AO)based method to obtain a local optimal *** convergence of the algorithm is illustrated by numerical ***,we propose a zero forcing(ZF)based method as sub-optimal solution,and the simulation section shows that the proposed two schemes could obtain better performance compared with traditional schemes.

关键词： Mobile edge computing(MEC) unmanned aerial vehicle(UAV) intelligent reflecting surface(IRS) zero forcing(ZF)