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Insect Science 2014年第2期21卷 159-173页

作者： Pei wang Hu Li Ying wang Jian-Hua Zhang Xun Dai Jian Chang Bao-Wen Hu wan-zhi cai Department of Entomology China Agricultural University Beijing Research Center of Hongta Group Yuxi Yunnan China

The complete mitochondrial （mt） genome of the plant bug, Apolygus lucorum, an important cotton pest, has been sequenced and annotated in this study. The entire circular genome is 14 768 bp in size and represents the smallest in presently known heteropteran mt genomes. The mt genome is encoding for two ribosomal RNA （rRNA） genes, 22 transfer RNA （tRNA） genes, 13 protein coding genes and a control region, and the order, content, codon usage and base organization show similarity to a great extent to the hypothetical ancestral model. All protein coding genes use standard initiation codons ATN. Conventional stop codons TAA and TAG have been assigned to the most protein coding genes; however, COIII, ND4 and ND5 genes show incomplete terminator signal （T）. All tRNA genes possess the typical clover leaf structure, but the dihydrouridine arm of tRNAser（A6N） only forms a simple loop. Secondary structure models of rRNA genes are generally in accordance with the former models, although some differences exist in certain parts. Three intergenic spacers have never been found in sequenced mt genomes of Heteroptera. The phylogenetic study based on protein coding genes is largely congruent with previous phylogenetic work. Both Bayesian inference and maximum likelihood analyses highly support the sister relationship ofA. lucorum and Lygus lineolaris, and Miridae presents a sister position to Anthocoridae.

关键词： Apolygus lucorum Cimicomorpha Miridae mitochondrial genome phylo-genetic relationship secondary structure

Does Bt maize expressing CrylAc protein have adverse effects on the parasitoid Macrocentrus cingulum （Hymenoptera： Braconidae）？

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Insect Science 2017年第4期24卷 599-612页

作者： Zeng-Xia wang Yun-He Li Kang-Lai He Shu-Xiong Bai Tian-Tao Zhang wan-zhi cai Zhen-Ying wang State Key Laboratory for Biology of Plant Diseases and Insect Pests MOA - CABI Joint Laboratory for Bio-safety Institute of Plant Protection Chinese Academy of Agricultural Science Beijing China Department of Entomology China Agriculture University Beijing China

The potential effects of insect-resistant, genetically engineered （GE） crops on non-target organisms, especially on predators and parasitoids, must be evaluated before their commercial cultivation. The effects of GE maize that produces CrylAc toxin on the parasitoid Macrocentrus cingulum were assessed by direct bioassay and indirect bioassay. In the indirect bioassay, parasitism rate, cocoon weight and the number of M. cingu- lure progeny produced per host were significantly reduced when M. cingulum-parasitized CrylAc-susceptible Ostriniafurnacalis were fed a diet containing purified CrylAc; how- ever, life-table parameters of M. cingulum were not adversely affected when the same assay was performed with Cry 1Ac-resistant （9. furnacalis. These results indicated that the detrimental effects detected with a CrylAc-susceptible host were mediated by poor host quality. In a direct bioassay, no difference in life-table parameters were detected when M. cingulum adults were directly fed a 20% honey solution with or without CrylAc; however, survival and longevity were significantly reduced when M. cingulum adults were fed a honey solution containing potassium arsenate, which was used as a positive control. The stability and bioactivity of CrylAc toxin in the food sources and CrylAc toxin uptake by the host insect and parasitoid were confirmed by enzyme-linked immunosorbent assay and sensitive-insect bioassays. Our results demonstrate that M. cingulum is not sensitive to CrylAc toxin at concentrations exceeding those encountered in Bacillus thuringiensis maize fields. This study also demonstrates the power of using resistant hosts when assess- ing the risk of genetically modified plants on non-target organisms and will be useful for assessing other non-target impacts.

关键词： CrylAc toxin ELISA environmental risk assessment non-target effects parasitoids prey/host quality-mediated effects

Seasonal and geographical variation in diapause and cold hardiness of the Asian corn borer, Ostrinia furnacalis

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Insect Science 2015年第4期22卷 578-586页

作者： Hai-Cui Xie Dun-Song Li Hong-Gang Zhang Charles E. Mason Zhen-Ying wang Xin Lu wan-zhi cai Kang-Lai He The State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences Beijing 100193 Department of Entomology China Agriculture University Beijing 100193 The Plant Protection Research Institute Guangdong Academy of Agricultural Sciences Guangzhou 510640 China Department of Entomology and Wildlife Ecology University of Delaware 531 S College Ave Rm 250 Newark DE 19716-2160 USA Institute of Plant Protection Jilin Academy of Agricultural Sciences Gongzhuling 136100 Jilin China

Asian corn borer, Ostrinia furnacalis （Guenee）, is a key corn pest in the Asian-Western Pacific countries. It overwinters as flail-grown larvae in plant stalks or in a spun-silk covering located in the plant debris in the temperate regions of China. Supercooling point （SCP） and survival rate after low sub-zero temperature treatment were assessed for field-collected populations in the laboratory using a cool bath with a 1 ℃/min cooling rate until -40℃. Mean SCPs were varied among geographical populations, with a significant decline from -22.7℃ of Haikou, the multivoltine tropical population in the south, to -28.5℃ of Gongzhuling, the univoltine temperate population in the northeast of China. In addition, there was more than 1℃ difference in SCP between Gongzhuling univoltine and bivoltine populations that were from the same geographic origin. Mean SCPs of the Guangzhou population fluctuated over the year, with significantly lower SCPs in winter than in other seasons, which correlated with a significantly higher proportion of diapausing larvae in winter than in other seasons. Over 41% of overwintering larvae from the northeast population could withstand to be supercooled for a few minutes to the low sub-zero temperature of-40℃, but only 6.7% of their southern counterparts did so. The findings from this study suggest that O. furnacalis mostly takes advantage of freeze avoidance as diapausing larvae for overwintering in the southern region, whereas it exhibits freeze tolerance in diapause in the northeastern region.

关键词： cold hardiness diapause geographical population Ostriniafurnacalis overwintering seasonality

新型PEC柱-钢梁T形件摩擦耗能型连接中节点滞回性能的数值模拟

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武汉理工大学学报 2014年第10期36卷 123-130页

作者：万财知方有珍姚江峰陆森强赵凯苏州科技学院江苏省结构重点实验室苏州215011

为研究预拉对穿螺栓的新型PEC柱-钢梁T形件摩擦耗能型连接中节点滞回性能,考虑轴压力、PEC柱截面形式、钢板组合截面布置方式与摩擦力大小等设计参数,采用有限元软件ABAQUS建立了5个有限元分析模型试件并对其进行循环荷载下的数值模拟,... 详细信息

为研究预拉对穿螺栓的新型PEC柱-钢梁T形件摩擦耗能型连接中节点滞回性能,考虑轴压力、PEC柱截面形式、钢板组合截面布置方式与摩擦力大小等设计参数,采用有限元软件ABAQUS建立了5个有限元分析模型试件并对其进行循环荷载下的数值模拟,得到试件的弯矩-转角滞回曲线。结果表明:摩擦耗能型连接方式不仅满足结构耗能延性性能设计目标,且承压型强度设计还能保证必要的安全冗余度;轴向力影响较小;摩擦力影响连接的耗能能力,但对其承载能力影响不明显;钢结构翼缘卷边措施可增强混凝土的约束作用,更好地满足"强柱弱梁"的抗震要求;预拉对穿螺栓表现部分自复位功效,且较好实现了混凝土斜压带传力机理,相应降低了对节点域腹板的抗剪要求;所有试件破坏模式均由于T形件的加强而使得梁截面的塑性铰出现位置向T形件腹板外排螺栓附近梁截面转移,且达到破坏时对应的节点转角均超过了0.04rad,表明该节点连接能较好满足抗震转动能力的需求。

关键词：新型PEC柱摩擦耗能型连接滞回性能节点传力机理破坏模式数值模拟

新型PEC柱-钢梁T形件焊接连接中节点抗震性能的有限元分析

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兰州理工大学学报 2015年第1期41卷 128-134页

作者：陆森强方有珍姚江峰万财知杨永龙苏州科技学院江苏省结构重点实验室江苏苏州215011

为研究新型钢板组合PEC柱-钢梁节点连接的抗震性能,以采用预拉对穿螺栓的新型PEC柱-钢梁T形件焊接连接中节点试验试件为研究对象,考虑轴压力、PEC柱截面形式与钢板组合截面布置方式等设计参数,利用有限元软件ABAQUS建立4个中节点有限元... 详细信息

为研究新型钢板组合PEC柱-钢梁节点连接的抗震性能,以采用预拉对穿螺栓的新型PEC柱-钢梁T形件焊接连接中节点试验试件为研究对象,考虑轴压力、PEC柱截面形式与钢板组合截面布置方式等设计参数,利用有限元软件ABAQUS建立4个中节点有限元模型并对其滞回性能进行模拟.研究结果显示:柱轴压力提高了节点连接的初始抗弯刚度,而二阶效应降低了其抗弯能力;采取钢结构翼缘卷边增强了混凝土的约束作用,更好地满足"强柱弱梁"的抗震要求;钢板组合截面布置是决定梁柱连接刚度合理匹配的关键;预拉对穿螺栓表现出部分自复位功效,且较好地实现了混凝土斜压带传力模式,相应降低了节点域腹板的抗剪要求;所有试件破坏模式均因T形件的加强使得梁上塑性铰出现位置向T形件腹板尾部附近梁截面转移,且所有试件达到破坏时节点转角均超过0.02弧度,表明该节点连接能较好地满足抗震对节点转动能力的需求.

关键词：新型PEC柱 T形焊接连接中节点滞回性能节点传力机理有限元分析

Influence of nitrogen implantation into HSS substrate on internal stress and adhesion strength of c-BN films

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中国有色金属学会会刊：英文版 2004年第z1期14卷 286-290页

作者： ZHANG Ping cai zhi-hai TAN Jun XIONG wan-quan National Key Laboratory for Remanufacturing Academy of Armored Force Engineering Beijing 100072 China National Key Laboratory for Remanufacturing Academy of Armored Force Engineering Beijing 100072 China National Key Laboratory for Remanufacturing Academy of Armored Force Engineering Beijing 100072 China National Key Laboratory for Remanufacturing Academy of Armored Force Engineering Beijing 100072 China

Cubic boron nitride(c-BN) films were deposited on HSS substrate implanted with nitrogen ion by RF-magnetron sputtering. The films were analyzed by bending beam method, scratch test, XRD and AFM. The results show that the implantation of N ion can reduce the internal stress and improve the adhesion strength of the *** critical load comes to 16.92N, compared to 1.75N of c-BN film on the unimplanted HSS. AFM shows that the surface of the c-BN film on the implanted HSS is low in roughness and small in grain size. The phase structure of the nitrogen implanted layer was analyzed by XRD. The influence of nitrogen implanted layer on the internal stress and adhesion strength of c-BN films were also investigated.

关键词： cubic boron nitride film HSS ion implantation internal stress adhesion

Estimations of Three Characteristic Stress Ratios for Rockfill Material Considering Particle Breakage

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Acta Mechanica Solida Sinica 2019年第2期32卷 215-229页

作者： wan-Li Guo Zheng-Yin cai Ying-Li Wu zhi-Zhou Geng Geotechnical Engineering Department Nanjing Hydraulic Research Institute Nanjing 210024 China

The particle breakage during specimen shearing has a significant influence on the critical-state line (CSL) of the rockfill material. A series of large-scale triaxial compression tests on the rockfill material from Henan Province (HPR) were conducted in a wide range of initial void ratios and confining pressures. The influences of the particle breakage on the critical-state stress ratio Mc, the peak stress ratio Mp and dilatancy stress ratio Md were investigated. The deviatoric stress and particle breakage of the HPR at the critical state increase with the increase in confining pressure, while the influences of the initial void ratio on these behaviors are too little to be considered. The gradient of the CSL in the q-p space of the rockfilL Mc, was found to be passively correlated with the particle breakage index rather than being a constant. Additionally, the observed values of Mc at low confining pressures (low particle breakage occur) will be substantially undervalued if Mc is estimated as a constant. In the critical-state-theorybased constitutive models, Mp and Md are estimated as the combinations of Mc and state parameter 0. It is believed that the simulations of Mp and Md when Mc is correlated with Br are obviously more favorable than those when Mc is constant.

关键词： Rockfill. Particle breakage Critical-state line Stress ratio

Extension Omega and Omega-Liutex methods applied to identify vortex structures in viscoelastic turbulent flow

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Journal of Hydrodynamics 2019年第5期31卷 911-921页

作者： Lu wang zhi-ying Zheng Wei-hua cai wan-you Li College of Aerospace and Civil Engineering Harbin Engineering UniversityHarbin 150001China College of Power and Energy Engineering Harbin Engineering UniversityHarbin 150001China School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China

The vortex structure plays a significant role in the investigation of the turbulent drag reduction effect of the viscoelastic turbulent *** paper aims to find out an optimal vortex identification method for the viscoelastic turbulent flows,and then studies the turbulent drag reduction mechanism by analyzing the characteristics of the identified vortex structures in the turbulent flows of the viscoelastic *** Q,λ2,Liutex,Omega(Ω)and Omega-Liutex(ΩR)methods are adopted for the identification of vortex structures in the forced homogeneous isotropic turbulence(FHIT)with/without the polymer additive,*** comparison among these five methods shows that the threshold values for the Q,λ2 and Liutex methods should be specially adjusted so as to suitably describe the strong and weak vortex structures in the FHIT of both the Newtonian and viscoelastic fluids,while a fixed threshold value of 0.52 for theΩandΩR methods is effective for both the Newtonian and viscoelastic *** comparison between the identified vortex structures in the FHIT with and without the polymer additive indicates that theΩandΩR methods are more appropriate for the vortex identification because their dimensionless values with a fixed range from 0 to 1 can avoid the effect of the different ranges of the Q,λ2 and∣R∣(for the Liutex method)for the Newtonian and viscoelastic *** also illustrates that theΩandΩR methods can be extended to identify the vortex structures in the turbulent flow of the viscoelastic ***,the characteristics of the vortex structures in the FHIT of the viscoelastic fluid are analyzed by utilizing theΩandΩR *** results show that both the strong and weak vortex structures are inhibited by increasing the concentration of the polymer solution and by decreasing the Weissenberg number,especially for the weak vortex structures.

关键词： Vortex identification Omega method(Ω) Omega-Liutex(ΩR)method forced homogeneous isotropic turbulence viscoelastic fluid

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皖西山区温度与西洋参种胚后熟关系的研究

特产研究 1999年第3期21卷 6-10页

作者：严平宛志沪蔡其武丁显勇安徽农业大学合肥230036 安徽省金寨县马宗岭林场

本试验用皖西山区不同海拔高度所采收的当年西洋参种子,在17 .0 ±1 ℃条件下处理30d ,然后移至12 .0 ±2 ℃的室内,观测种子裂口率和胚长,并分别以其为因变量(Y) ,以≥10 ℃积温为自变量(X) ,进行模型拟合,结果发现,裂口率与积温关系... 详细信息

本试验用皖西山区不同海拔高度所采收的当年西洋参种子,在17 .0 ±1 ℃条件下处理30d ,然后移至12 .0 ±2 ℃的室内,观测种子裂口率和胚长,并分别以其为因变量(Y) ,以≥10 ℃积温为自变量(X) ,进行模型拟合,结果发现,裂口率与积温关系在胚分化与胚快速生长期分别满足方程Y 1 - a 1 - b 1 ·lgx = 0 和b 2Y 2 - Y 22 + a 2x 2 = 0 ;胚长和积温关系Y 3 - a 3x - b3Y32 = 0 方程,且拟合精度较高。种子在室内处理60d 后, 裂口率最高可达93 .5 % 。12 月20 日前播种,经过80d 以上自然低温( - 2 - 4 ℃) 的生理后熟期,出苗率达80 ～90 % 。

关键词：温度西洋参种胚后熟皖西山区栽培

基于多分支增强和融合注意力机制的水下图像增强算法

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陕西科技大学学报 2025年第1期43卷 193-202页

作者：姚斌韩典芝徐轩李婉陕西科技大学电子信息与人工智能学院陕西西安710021

由于水对光的折射和吸收,水下图像通常会出现严重的退化,如色偏、模糊、能见度低等.为了提高水下图像的可视性,提出了一种基于多分支增强和融合注意力机制的水下图像增强网络MBFA-GAN.首先,通过分析水下图像的色彩退化和模糊因素,设计... 详细信息

由于水对光的折射和吸收,水下图像通常会出现严重的退化,如色偏、模糊、能见度低等.为了提高水下图像的可视性,提出了一种基于多分支增强和融合注意力机制的水下图像增强网络MBFA-GAN.首先,通过分析水下图像的色彩退化和模糊因素,设计了青品色温修复模块和模糊恢复模块对水下图像进行色彩矫正和模糊恢复.然后,基于对多个分支特征的互补性考虑,采用循环合并策略将多个分支增强的特征利用自适应融合模块进行融合,逐步增强图像细节.最后,设计了融合注意力模块,用于深度挖掘图像在通道维度和像素维度的相关性矩阵,以提高增强图像的真实性.实验结果表明,与现有算法相比,提出的水下图像增强算法去模糊效果较好且颜色更真实,可以有效改善水下图像色偏和模糊的问题.

关键词：水下图像增强多分支增强融合注意力生成对抗网络