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热-力-电耦合下天线罩电性能仿真及分析

空军工程大学学报 2024年第3期25卷 2-11页

作者：吉建民王伟余慧龙刘涓陈博北京遥感设备研究所北京100854

在实际飞行工况下,热力载荷会改变高速飞行器天线罩原有的电磁特性,从而影响制导性能。提出了一种基于六面体网格划分的热-力-电耦合模型及仿真方法,可准确表征高速飞行工况下天线罩介电温漂和结构变形对电性能的影响。基于天线罩热-力... 详细信息

在实际飞行工况下,热力载荷会改变高速飞行器天线罩原有的电磁特性,从而影响制导性能。提出了一种基于六面体网格划分的热-力-电耦合模型及仿真方法,可准确表征高速飞行工况下天线罩介电温漂和结构变形对电性能的影响。基于天线罩热-力-电共享网格模型,首先通过瞬态热仿真得到天线罩响应温度场,通过静力分析得到天线罩结构变形场。然后,将天线罩介电温漂和结构变形准确传递到其电磁仿真模型中,并采用三维射线跟踪法计算其电性能。最后通过一个典型算例对高速飞行工况下天线罩电性能的变化进行仿真和分析,结果表明电性能变化非常明显,也进一步说明了所提方法的可行性和研究的必要性。

关键词：高速飞行器天线罩热-力-电耦合介电温漂结构变形电性能

Plant pan-genomics:recent advances,new challenges,and roads ahead

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Journal of Genetics and Genomics 2022年第9期49卷 833-846页

作者： wei Li Jianan Liu Hongyu Zhang Ze Liu Yu Wang Longsheng Xing Qiang He huilong Du School of Life Sciences Institute of Life Sciences and Green DevelopmentHebei UniversityBaodingHebei 071000China

Pan-genomics can encompass most of the genetic diversity of a species or population and has proved to be a powerful tool for studying genomic evolution and the origin and domestication of species,and for providing information for plant improvement.Plant genomics has greatly progressed because of improvements in sequencing technologies and the rapid reduction of sequencing costs.Nevertheless,pangenomics still presents many challenges,including computationally intensive assembly methods,high costs with large numbers of samples,ineffective integration of big data,and difficulty in applying it to downstream multi-omics analysis and breeding research.In this review,we summarize the definition and recent achievements of plant pan-genomics,computational technologies used for pan-genome construction,and the applications of pan-genomes in plant genomics and molecular breeding.We also discuss challenges and perspectives for future pan-genomics studies and provide a detailed pipeline for sample selection,genome assembly and annotation,structural variation identification,and construction and application of graph-based pan-genomes.The aim is to provide important guidance for plant pan-genome research and a better understanding of the genetic basis of genome evolution,crop domestication,and phenotypic diversity for future studies.

关键词： Plant pan-genome Genomic evolution Crop domestication Graph-based genome

A Robust Superhydrophobic Smart Coating with Reversible Thermochromic and Photochromic Property

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Journal of Bionic Engineering 2022年第6期19卷 1589-1600页

作者： Peng Wang Xuesong Zhang Zhihao Wang Tao Chen Honglian Zhang wei Duan huilong Han School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBaoding071000China Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention North China Electric Power UniversityBaoding071003China

Both thermochromic and photochromic coating have attracted many attentions due to their widely applications,but the low stability is a big obstacle.Inspired by the lotus leaf,to endow the chromic coating with superhydrophobicity is a possible solution.In this research,a dual response coating was prepared by adding photochromic and thermochromic particles simultaneously.The prepared sample demonstrated at least four-state color switching,which can be successfully used in tactile imaging,multi-color fabric,erasable record,and security labels.The superhydrophobicity was achieved by introducing vinyl-terminated polydimethylsiloxane,which not only offers low surface energy but also can cross-link with the particles to increase the adhesion.Thus,the prepared sample maintained superhydrophobicity after various kinds of destruction(such as sandpaper abrasion,corrosive liquid attack,ultrasonic treatment,UV irradiation,and high-speed drops/turbulent jets impact).Even though the superhydrophobicity can be destroyed by plasma etching,it can be recovered after 12 h at room temperature.

关键词： Bionic coating Superhydrophobic Thermochromic Photochromic Robust

The genome of okra (Abelmoschus esculentus) provides insights into its genome evolution and high nutrient content

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Horticulture Research 2023年第8期10卷 29-43页

作者： Ruyu Wang wei Li Qiang He Hongyu Zhang Meijia Wang Xinyuan Zheng Ze Liu Yu Wang Cailian Du huilong Du Longsheng Xing College of Life Sciences Institute of Life Sciences and Green DevelopmentHebei UniversityBaoding 071000China Hebei Basic Science Center for Biotic Interaction Institute of Life Sciences and Green DevelopmentHebei UniversityBaoding 071000China

Okra(Abelmoschus esculentus)is an important vegetable crop with high nutritional value.However,the mechanism underlying its high nutrient content remains poorly understood.Here,we present a chromosome-scale genome of okra with a size of 1.19 Gb.Comparative genomics analysis revealed the phylogenetic status of A.esculentus,as well as whole-genome duplication(WGD)events that have occurred widely across the Malvaceae species.We found that okra has experienced three additional WGDs compared with the diploid cotton Gossypium raimondii,resulting in a large chromosome number(2n=130).After three WGDs,okra has undergone extensive genomic deletions and retained substantial numbers of genes related to secondary metabolite biosynthesis and environmental adaptation,resulting in significant differences between okra and G.raimondii in the gene families related to cellulose synthesis.Combining transcriptomic and metabolomic analysis,we revealed the relationship between gene expression and metabolite content change across different okra developmental stages.Furthermore,the sinapic acid/S-lignin biosynthesis-related gene families have experienced remarkable expansion in okra,and the expression of key enzymes involved in the sinapic acid/S-lignin biosynthesis pathway vary greatly across developmental periods,which partially explains the differences in metabolite content across the different stages.Our study gains insights into the comprehensive evolutionary history of Malvaceae species and the genetic basis that underlies the nutrient content changes in okra,which will facilitate the functional study and genetic improvement of okra varieties.

关键词： content insight evolution

A Superhydrophobic/Electrothermal/Photothermal Synergistically Anti-icing Strategy with Excellent Self-healable and Anti-abrasion Property

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Journal of Bionic Engineering 2021年第5期18卷 1147-1156页

作者： Peng Wang Jian Wang wei Duan Chunyan Li huilong Han Qing Xie School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBaodingChina Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention North China Electric Power UniversityBaoding 071003China School of Electrical and Electronic Engineering North China Electric Power UniversityBaodingHebeiChina

Unexpected ice accumulation tends to cause many problems or even disasters in our daily life.Based on the superior electrothermal and photothermal function of the carbon nanotubes,we introduced a superhydrophobic/electrothermal/photothermal synergistically anti-icing strategy.When a voltage of 15 V was applied to the superhydrophobic sample,the surface could rapidly melt the ice layer(~3 mm thickness)within 530 s at the environmental temperature of-25℃.When the near-infrared light(808 nm)irradiates on the superhydrophobic sample,the ice could be rapidly removed after 460 s.It was found that the superhydrophobicity helps the melted water to roll off immediately,and then solves the re-freeze problem the traditional surfaces facing.Moreover,the ice can be completely melted with 120 s when the superhydrophobic/electrothermal/photothermal synergistically anti-icing strategy was utilized.To improve the mechanical robustness for practical application,both nanoscale carbon nanotubes and microscale carbon powders were utilized to construct hierarchical structure.Then these dual-scale fillers were sprinkled onto the semi-cured elastomer substrate to prepare partially embedded structure.Both hierarchical structure and partially embedded structure were obtained after completely curing the substrate,which imparts excellent abrasion resistance(12.50 kPa,16.00 m)to the prepared sample.Moreover,self-healable poly(urea–urethane)elastomer was introduced as the substrate.Thus,the cutted superhydrophobic sample can be mended by simply contacting at room temperature.

关键词： Superhydrophobic Electrothermal Photothermal Self-healing

A Passive Anti-icing Strategy Based on a Superhydrophobic Mesh with Extremely Low Ice Adhesion Strength

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Journal of Bionic Engineering 2021年第1期18卷 55-64页

作者： Peng Wang Ziqiang Li Qing Xie wei Duan Xinchun Zhang huilong Han School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBaoding 071000China Hebei Key Laboratory of Electric Machinery Health Maintenance&Failure Prevention North China Electric Power UniversityBaoding 071003China School of Electrical and Electronic Engineering North China Electric Power UniversityBaoding 071003China

Although superhydrophobic materials have attracted much research interest in anti-icing,some controversy still exists.In this research,we report a cost-effective method used to verify the contribution of area fraction to ice adhesion strength.We tried to partially-embed siliea nanopnarticles into microscale fabrics of a commercial polyamide mesh.Then,the area fraction could be determined by altering the mesh size.Generally,the ice adhesion strength decreases as the area fraction decreases.An ice adhesion strength of~1.9 kPa and a delayed freezing time of~1048 s can be obtained.We attribute the low ice adhesion strength to the combination of superhydro-phobicity and stress concentration.The superhydrophobicity prohibits the water from penetrating into the voids of the meshes,and the small actual contact area leads to stress concentration which promotes interfacial crack propagation.Moreover,our superhydrophobic mesh simultaneously exhibis a micro-nano hierarchical structure and a partally-cmbedded structure.Therefore,the as-prepared superhydrophobic mesh retained the ieephobicity after 20 icingldeicing cycles,and maintained its superhydrophobicity even afier 60 sandpaper-abrasion cycles and a 220"C thermal treatment.

关键词： bionic superhydrophobic anti-icing mechanical robustness hierarchical structure partially-embedded structure

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基于正交设计模型的雷电反击侵入波研究

电工技术 2024年第3期 66-70,83页

作者：茅鑫同陈兵刘巍柏彬赵会龙韩超黄涛周俊范舟刘志伟国网江苏省电力有限公司建设分公司江苏南京210000 扬州北辰电气集团有限公司江苏扬州225000

雷击事故是影响电网系统安全稳定运行的重要因素,尤其是雷电反击事故,较大的雷电反击侵入波是引发电力设备故障的主要原因。国内外学者就侵入波的研究很多,但缺乏对诸多影响因素的综合分析。因此,在单独分析影响因素的基础上,采用正交... 详细信息

雷击事故是影响电网系统安全稳定运行的重要因素,尤其是雷电反击事故,较大的雷电反击侵入波是引发电力设备故障的主要原因。国内外学者就侵入波的研究很多,但缺乏对诸多影响因素的综合分析。因此,在单独分析影响因素的基础上,采用正交设计法对雷击点、杆塔冲击接地电阻R_(d)及门型构架冲击接地电阻R_(m)进行正交建模和交叉分析。研究发现,反击侵入波过电压最严重的情况为A2B0C0(雷击#3、R_(d)=10Ω及R_(m)=10Ω)和A2B0C2(雷击#3、R_(d)=10Ω及R_(m)=0.5Ω)。

关键词：雷电反击侵入波正交设计法仿真建模

Gm Ms1 encodes a kinesin-like protein essential for male fertility in soybean(Glycine max L.)

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Journal of Integrative Plant Biology 2021年第6期63卷 1054-1064页

作者： Muhammad Nadeem Andong Chen huilong Hong Dongdong Li Jiajia Li Duo Zhao wei Wang Xiaobo Wang Lijuan Qiu School of Agronomy Anhui Agricultural UniversityHefei 230036China The National Key Facility for Crop Gene Resources and Genetic Improvement(NFCRI)/Key Laboratory of Crop Gene Resource and Germplasm Enhancement(MOA) Institute of Crop SciencesThe Chinese Academy of Agricultural SciencesBeijing 100081China

The application of heterosis is a promising approach for greatly increasing yield in soybean(Glycine max L.). Nuclear male sterility is essential for hybrid seed production and the utilization of heterosis. Here we report the cloning of the gene underlying the soybean male-sterile mutant ms-1,which has been widely used for recurrent selection in soybean breeding programs. We initially delimited the ms1 locus to a 16.15 kb region on chromosome13, based on SLAF_BSA sequencing followed by genotyping of an F_(2) population segregating for the locus. Compared with the same region in fertile plants, the mutant region lacks a sequence of approximately 38.7 kb containing five protein-coding genes, including an ortholog of the kinesin-like protein gene NACK2, named Gm Ms1. The Gm Ms1 knockout plants generated via CRISPR/Casmediated gene editing displayed a complete malesterile phenotype. Metabolic profiling showed that fertile anthers accumulated starch and sucrose normally, whereas sterile anthers had higher anthocyanin levels and lower flavonoid levels and lower antioxidant enzyme activities. These results provide insights into the molecular mechanisms governing male sterility and demonstrate that Gm Ms1 could be used to create male-sterile lines through targeted mutagenesis. These findings pave the way for designing seed production technology and an intelligent male-sterile line system to utilize heterosis in soybean.

关键词： metabolome sequencing nuclear male sterility soybean third generation sequencing transcriptome sequencing

A Superhydrophobic Hydrogel for Self-Healing and Robust Strain Sensor with Liquid Impalement Resistance

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Chinese Journal of Chemistry 2021年第12期39卷 3393-3398页

作者： Peng Wang Tao Chen Xuesong Zhang wei Duan Chongyuan Zhang huilong Han Qing Xie School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBaodingHebei 071003China Hebei Key Laboratory of Electric Machinery Health Maintenance&Failure Prevention North China Electric Power UniversityBaodingHebei 071003China School of Electrical and Electronic Engineering North China Electric Power UniversityBaodingHebei 071003China

The superhydrophobic strain sensor is a fantastic direction,which could protect the strain sensor in harsh environment.Nevertheless,the self-healing superhydrophobic strain sensor has not been reported.In this research,we developed a superhydrophobic strain sensor,which demonstrated excellent self-healing,mechanical robustness,and liquid impalement resistance simultaneously.The key innovation is to partially embed hydrophobic graphene and carbon nanotubes into the hydrogel matrix.The hodrogel substrate endows the sample with self-healing property.The graphene,carbon nanotubes and hydrogel together lead to an accurate and real-time monitoring of human motion.Furthermore,the prepared sample demonstrated super-robust superhydrophobicity,which retained superhydrophobicity after many kinds of damage(such as 1000%stretch,10000 stretching-releasing cycles,hand-rub,tape-peeling,and high-speed drop/jet impact).

关键词： Hydrophobic effect Gels Graphene Strain sensor Self-healing