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Linear spatial instability analysis in 3D boundary layers using plane-marching 3D-LPSE

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Applied Mathematics and Mechanics(English Edition) 2016年第8期37卷 1013-1030页

作者： jianxin liu Shaolong ZHANG Song FU Department of Mechanism Tianjin University School of Aerospace Engineering Tsinghua University

It is widely accepted that a robust and efficient method to compute the linear spatial amplified rate ought to be developed in three-dimensional （3D） boundary layers to predict the transition with the e^N method, especially when the boundary layer varies significantly in the spanwise direction. The 3D-linear parabolized stability equation （3D- LPSE） approach, a 3D extension of the two-dimensional LPSE （2D-LPSE）, is developed with a plane-marching procedure for investigating the instability of a 3D boundary layer with a significant spanwise variation. The method is suitable for a full Mach number region, and is validated by computing the unstable modes in 2D and 3D boundary layers, in both global and local instability problems. The predictions are in better agreement with the ones of the direct numerical simulation （DNS） rather than a 2D-eigenvalue problem （EVP） procedure. These results suggest that the plane-marching 3D-LPSE approach is a robust, efficient, and accurate choice for the local and global instability analysis in 2D and 3D boundary layers for all free-stream Mach numbers.

关键词： three-dimensional linear parabolized stability equation (3D-LPSE) bi-global instability three-dimensional (3D) boundary layer Gortler fow crossflow vortex

基于OpenGL着色器和双缓存的雷达航迹高效显示方法

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现代雷达 2024年第1期46卷 36-38页

作者：刘建新明亮张霆赵立营南京电子技术研究所江苏南京210039

随着雷达航迹容量与日俱增,雷达显控软件的显示效率成为亟待解决的问题,同时国产化硬件平台也给显示效率带来了更大的挑战。文中提出了一种基于OpenGL着色器的雷达航迹高效显示方法,该方法利用双缓存和着色器技术,充分发挥显卡的并行处... 详细信息

随着雷达航迹容量与日俱增,雷达显控软件的显示效率成为亟待解决的问题,同时国产化硬件平台也给显示效率带来了更大的挑战。文中提出了一种基于OpenGL着色器的雷达航迹高效显示方法,该方法利用双缓存和着色器技术,充分发挥显卡的并行处理能力,大大提升了显示效率。该方法已在实际项目中得到应用并获得了较好的评价,具有良好的使用效果和推广价值。

关键词：雷达显控着色器双缓存航迹显示

Peculiar influence of linearly polarized spectrum illumination patterns on the sensitivity characteristics of locust response to polarized light

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International Journal of Agricultural and Biological Engineering 2024年第2期17卷 59-67页

作者： Qihang liu Huiyuan Zhao Pingchuan Zhang jianxin Cui Guohong Gao Henan Institute of Science and Technology Xinxiang 453003HenanChina Hebi Jiaduoweinong Agriculture and Forestry Technology Co. LtdHebi 458000HenanChina

This study investigated the influence of different linearly polarized spectrum lights on locusts polartactic response characteristics linearly polarized vector sensitivity mode and polartactic response by using linearly polarized spectrum vector light module and experimental *** objective was to clarify the vector sensitivity characteristics and functional effect of linearly polarized light spectrum intensity on locusts polartactic response,determine the influence specificity of linearly polarized spectrum illumination properties on locusts polarization-related *** spectrum and illumination were constant,locusts polartactic response,presenting the response feature of sine and cosine function change specificity,was related to spectrum *** visual acuity effect stimulated by violet spectrum was the best,whereas the optical distance modulation effect induced by orange spectrum was the *** illumination was enhanced,locusts vector sensitivity mode shifted to present the specific sensitivity prompted by light intensity at long distance and inhibited by light intensity at short ***,the regulating function of violet spectrum was the strongest,and the regulatory mutation effect of orange spectrum was the least ***,locusts polartactic sensitivity to 300°vector at 100 lx,whereas to 240°vector at 1000 lx of linearly polarized violet light was the *** polartactic aggregation and visual tendency sensitivity to 90°vector at 100 lx,whereas to 270°vector at 1000 lx of linearly polarized violet light was the *** heterogeneous regulation function of different linearly polarized spectrum couplings with light intensity led to significant variations in locusts vector sensitivity *** was derived from the antagonistic and specific tuning characteristics of locusts polartactic vision,reflecting the integrated output effect of locusts vector dependence regulated by linearly polarized spect

关键词： Locusta migratoria linearly polarized light spectrum illumination pattern locusts polar axis response vector

黄瓜IDD基因家族鉴定及其在雌花花冠发育中的表达分析

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东北农业大学学报 2024年第2期55卷 19-31页

作者：辛明姜赫然李英楠徐浩轩张怡宁刘健新饶雨晗高鹤鸣徐绒田晓卉东北农业大学园艺园林学院哈尔滨150030

研究基于黄瓜(Cucumis sativus L.)基因组数据,对CsIDD基因进行全基因组鉴定、蛋白理化性质、染色体定位等生物信息学分析,检测其组织表达模式。结果表明,CsIDD蛋白在系统进化中共分为5个亚组,均定位于细胞核,motif分布及组织模式较为保... 详细信息

研究基于黄瓜(Cucumis sativus L.)基因组数据,对CsIDD基因进行全基因组鉴定、蛋白理化性质、染色体定位等生物信息学分析,检测其组织表达模式。结果表明,CsIDD蛋白在系统进化中共分为5个亚组,均定位于细胞核,motif分布及组织模式较为保守;部分CsIDD表达具有明显的组织特异性,在雌花花冠中表达水平较高。因此推测其在雌花花冠发育过程中发挥重要作用。

关键词：黄瓜 IDD基因成员鉴定生物信息学表达分析

A novel integrated microfluidic chip for on-demand electrostatic droplet charging and sorting

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Bio-Design and Manufacturing 2024年第1期7卷 31-42页

作者： Jinhui Yao Chunhua He jianxin Wang Canfeng Yang Ye Jiang Zhiyong liu Guanglan Liao Tielin Shi State Key Laboratory of Intelligent Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China

On-demand droplet sorting is extensively applied for the efficient manipulation and genome-wide analysis of individual ***,state-of-the-art microfluidic chips for droplet sorting still suffer from low sorting speeds,sample loss,and labor-intensive preparation ***,we demonstrate the development of a novel microfluidic chip that integrates droplet generation,on-demand electrostatic droplet charging,and high-throughput *** charging electrode is a copper wire buried above the nozzle of the microchannel,and the deflecting electrode is the phosphate buffered saline in the microchannel,which greatly simplifies the structure and fabrication process of the ***,this chip is capable of high-frequency droplet generation and sorting,with a frequency of 11.757 kHz in the drop *** chip completes the selective charging process via electrostatic induction during droplet ***-demand charged microdroplets can arbitrarilymove to specific exit channels in a three-dimensional(3D)-deflected electric field,which can be controlled according to user requirements,and the flux of droplet deflection is thereby significantly ***,a lossless modification strategy is presented to improve the accuracy of droplet deflection or harvest rate from 97.49% to 99.38% by monitoring the frequency of droplet generation in real time and feeding it back to the charging *** chip has great potential for quantitative processing and analysis of single cells for elucidating cell-to-cell variations.

关键词： Copper wire Droplet generation Droplet sorting Microfluidic chips On-demand charging

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寒地野生大豆种质资源游离氨基酸组分分析

中国农学通报 2024年第12期40卷 134-141页

作者：樊超毕影东刘淼李炜刘建新杨光梁文卫邸树峰唐立郦来永才黑龙江省农业科学院耕作栽培研究所哈尔滨150001 黑龙江省农业科学院博士后科研工作站哈尔滨150086 黑龙江省农业科学院经济作物研究所哈尔滨150001

旨在对采集自黑龙江省各地区的寒地野生大豆种质资源游离氨基酸组分进行深入分析。以153份寒地野生大豆为试材,利用全自动氨基酸分析仪进行了17种游离氨基酸含量的测定,并对测定结果进行了系统分析比较。结果表明:17种游离氨基酸中,甲... 详细信息

旨在对采集自黑龙江省各地区的寒地野生大豆种质资源游离氨基酸组分进行深入分析。以153份寒地野生大豆为试材,利用全自动氨基酸分析仪进行了17种游离氨基酸含量的测定,并对测定结果进行了系统分析比较。结果表明:17种游离氨基酸中,甲硫氨酸变异幅度最大,变异系数为0.469,总游离氨基酸含量为2.069 mg/g,其中精氨酸含量最高,为0.894 mg/g。17种游离氨基酸含量与总游离氨基酸含量之间均为正相关,大部分游离氨基酸之间表现为正相关,仅天冬氨酸与苯丙氨酸以及丝氨酸与精氨酸之间表现为显著负相关。主成分分析提取的前5个主成分累计贡献率达85.15%,第1、2主成分贡献率分别为26.47%和20.55%。以第1、2主成分作图可知,北部地区资源和中南部地区资源之间差异较大,东部地区和西部地区资源之间差异较小。该研究明确了寒地野生大豆中17种游离氨基酸含量变异情况和组分之间的相关性,明确了不同来源地对游离氨基酸含量和组分的影响,为大豆育种应用提供了重要的基础数据。

关键词：寒地野生大豆游离氨基酸变异系数相关性分析主成分分析

Comparison of marine controlled-source electromagnetic data acquisition systems by a reservoir sensitivity index:analyzing the effect of water depths

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Acta Oceanologica Sinica 2016年第11期35卷 113-119页

作者： GUO Zhenwei DONG Hefeng liu jianxin Norwegian University of Science and Technology Trondheim 7491Norway Central South University Changsha 410083China

During the past ten years, a marine controlled source electromagnetic（CSEM） method has been developed rapidly as a technology for hydrocarbon exploration. For shallow water environments, two CSEM data acquisition systems： Seabed Logging（SBL） and towed streamer electromagnetics（TSEM） have been developed in recent years. The purpose is to compare the performance of the SBL and TSEM systems at different water depths. Three different methods for the comparison are presented. The first method is a quick one dimensional sensitivity modelling. As a result, the sensitivity of marine CSEM data increases with water depth for the SBL system. Further, the sensitivity decreases with the increasing water depth for the TSEM system. The two other methods use two dimensional synthetic data from a simple 2-D isotropic model. The second method is a reservoir sensitivity index（RSI） method which has been developed to provide a quick comparison of the two systems. The RSI is calculated as the amplitude of the scattered field dividing by data uncertainty. From the calculations, it is found that with the increasing water depth RSI increases for the SBL system, while it decreases for the TSEM system. The third method uses Occam＇s inversion, and applies an anomaly transverse resistance（ATR） ratio for evaluating the resulting resistivity image. In shallow water environments, the resolution of the CSEM inversion results is good for both the SBL and TSEM systems. In deep water environments, the resolution of the CSEM inversion is better for the SBL system than for the TSEM system. The ATR ratios of the resistivity images show the similar conclusion. The SBL data acquisition system has an advantage in deep water environments. The TSEM system, on the other hand, is preferable for the shallow water environments.

关键词： controlled-source electromagnetic reservoir sensitivity index seabed logging towed streamerelectromagnetic

消纳弃风的风电混合储能供热系统容量配置优化

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暖通空调 2024年第4期54卷 29-35页

作者：孔茁铭周勃孙成才尚亚敏刘建新王雅洁沈阳工业大学沈阳

为解决“三北”地区冬季建筑能耗较高且弃风严重的问题,设计了由锂电池、固体蓄热装置和热泵设备组成的风电混合储能供热系统。首先基于BP神经网络预测了风电机组输出功率,采用k-means聚类分析得到了供热典型日负荷曲线;然后提出了一种... 详细信息

为解决“三北”地区冬季建筑能耗较高且弃风严重的问题,设计了由锂电池、固体蓄热装置和热泵设备组成的风电混合储能供热系统。首先基于BP神经网络预测了风电机组输出功率,采用k-means聚类分析得到了供热典型日负荷曲线;然后提出了一种基于粒子群优化算法的风电混合储能供热系统容量配置优化方法,以系统总成本最小和弃风量最低为约束条件构建了目标函数;最后比较了考虑和不考虑弃风条件下,风电混合储能供热系统的容量配置优化结果。研究表明,所提出的优化方法不但可以有效降低弃风率,场景适用性强,还能够满足严寒地区冬季清洁供热需求,为可再生能源高效利用提供参考。

关键词：风电混合储能供热系统弃风容量配置优化粒子群优化算法聚类分析

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Biomarker and pathway analyses of urine metabolomics in dairy cows when corn stover replaces alfalfa hay

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Journal of Animal Science and Biotechnology 2017年第1期8卷 119-127页

作者： Huizeng Sun Bing Wang Jiakun Wang Hongyun liu jianxin liu Institute of Daiw Science MoE Key Laboratory of Molecular Animal Nutrition College of Animal Sciences Zhejiang University Hangzhou 310058 People's Republic of China

Background： Alfalfa hay and corn stover are different type of forages which can significantly impact a cow＇s lactation performance, but the underlying metabolic mechanism has been poorly studied. We used biomarker and pathway analyses to characterize related biomarkers and pathways based on urine metabolomics data from different forage treatments. Urine was col ected from 16 multiparous Holstein dairy cows fed alfalfa hay（AH, high-quality forage, n = 8） and corn stover（CS, low-quality forage, n = 8） respectively. Gas chromatography–time of flight/mass spectrometry（GC-TOF/MS） was performed to identify metabolites in urine and the metaboanalyst online platform was used to do biomarker and pathway ***： Hippuric acid（HUA） and N-methyl-glutamic（NML-Glu） indicated the most significant difference between the two diets, when statistical y validated by biomarker analysis. HUA was also validated by standard compound quantitative method and showed significant higher concentration in CS group than AH group（2.8282 vs. 0.0005 mg/mL; P 〈 0.01）.The significant negative correlation between milk yield and HUA（R^2= 0.459; P 〈 0.01） and significant positive correlation between milk yield and NML-Glu（R^2= 0.652; P 〈 0.01） were characterized. The pathway analysis revealed that these different metabolites were involved in 17 pathways including 7 influential pathways（pathway impact value 〉 0）： Tyr metabolism, starch and sucrose metabolism, amino sugar and nucleotide sugar metabolism, galactose metabolism,Phe, Tyr and Try biosynthesis, purine metabolism, and glycerolipid metabolism. Based on the metabolome view map,the Phe, Tyr and Try biosynthesis pathway exhibited the highest impact value（0.50）, and the Holm-Bonferroni multiple testing-based analysis revealed the most significant difference in the Tyr metabolism pathway（Holm P = 0.048）.Conclusions： The identified HUA and NML-Glu may serve as potential biomarkers for discriminating CS and AH diets and could be used as candidat

关键词： Biomarker Dairy cow Metabolomics Pathway Urine