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Machine-learning-empowered multispectral metafilm with reduced radar cross section,low infrared emissivity,and visible transparency

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Photonics Research 2022年第5期10卷 1146-1156页

作者： RUICHAO ZHU JIAFU WANG JINMING JIANG cuiLIAN XU CHE LIU YUXIANG JIA SAI SUI ZHONGTAO ZHANG TONGHAO LIU ZUNTIAN CHU JUN WANG TIE JUN cui shaobo QU Shaanxi Key Laboratory of Artificially-Structured Functional Materials and Devices Air Force Engineering UniversityXi’an 710051China Institute of Electromagnetic Space Southeast UniversityNanjing 210096China State Key Laboratory of Millimeter Wave Southeast UniversityNanjing 210096China

For camouflage applications,the performance requirements for metamaterials in different electromagnetic spectra are usually contradictory,which makes it difficult to develop satisfactory design schemes with multispectral ***,empowered by machine learning,metamaterial design is no longer limited to directly solving Maxwell’s *** design schemes and experiences of metamaterials can be analyzed,summarized,and learned by computers,which will significantly improve the design efficiency for the sake of practical engineer-ing ***,we resort to the machine learning to solve the multispectral compatibility problem of metamaterials and demonstrate the design of a new metafilm with multiple mechanisms that can realize small microwave scattering,low infrared emissivity,and visible transparency simultaneously using a multilayer back-propagation neural *** rapid evolution of structural design is realized by establishing a mapping between spectral curves and structural *** training the network with different materials,the designed network is more *** simulations and experimental verifications,the designed architecture has good accuracy and *** paper provides a facile method for fast designs of multispectral metafilms that can find wide applications in satellite solar panels,aircraft windows,and others.

关键词： transparency visible film

Effects of Amino Acid or Fulibao Nutritional Additives on Slaughter Performance and Pork Quality of Pigs

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Animal Husbandry and Feed Science 2022年第4期14卷 33-36页

作者： Li shaobo Zheng Boqiang Li Xiuliang Huang Jie Du Lijuan Sun Qinju Yang cui Yang Jiahuang Guangxi Agricultural Vocational University Nanning 530009China

[Objective]The paper was to study the effects of amino acid or Fulibao nutritional additives on slaughter performance and pork quality of pigs,and to provide a theoretical basis for improving pork quality in pig breeding industry.[Method]Six Landrace×Yorkshire castrated male piglets were divided into three *** piglets in the first group were fed with conventional diet and used as the *** piglets in the experimental group I were fed with the conventional diet supplementing 0.1%Fulibao,and those in the experimental group II were fed with the conventional diet supplementing 0.36%compound amino acid *** piglets were reared for 2 months before being slaughtered.[Result]The average daily gains of piglets in the experimental groups I and II were 17.7%and 6.73%higher than that in the control group,but there was no difference in feed/gain ratio among the three *** dressing percentages of piglets in the experimental groups I and II were 2.7%and 1.72%higher than that in the control group,and the lean meat percentages were 3.5%and 7.97%higher than that in the control group,*** meat fat ratios in the two experimental groups were significantly higher than that in the control *** intermuscular fat in the experimental group II was significantly higher than that in the control ***,the contents of intermuscular fat and inosinic acid in the experimental group II were significantly lower than those in the control group.[Conclusion]Both additives can improve the average daily gain and main slaughter performance of pigs,but can not improve the inosine acid content,and the compound amino acid preparation can not improve the intermuscular fat content.

关键词： Slaughter performance Pork quality Nutritional additives Production performance

儿童单侧腹股沟疝术后发生异时性对侧腹股沟疝的影响因素分析

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中国普通外科杂志 2024年第6期33卷 1023-1028页

作者：蒋磊崔云伟褚亮周少波蚌埠医科大学第二附属医院普通外科安徽蚌埠233000 蚌埠医科大学第二附属医院急诊外科安徽蚌埠233000

背景与目的:腹股沟疝手术是儿童常见的外科手术之一,单侧腹股沟疝手术后发生异时性对侧腹股沟疝(MCIH)的概率为2.4%~29.0%,因此一些外科医生建议将对侧未闭的鞘状突进行预防性修复,不仅避免嵌顿疝的发生,同时减少全身麻醉的风险以及二... 详细信息

背景与目的:腹股沟疝手术是儿童常见的外科手术之一,单侧腹股沟疝手术后发生异时性对侧腹股沟疝(MCIH)的概率为2.4%~29.0%,因此一些外科医生建议将对侧未闭的鞘状突进行预防性修复,不仅避免嵌顿疝的发生,同时减少全身麻醉的风险以及二次住院的费用;但是有学者认为,需要4~21次不必要的手术才能预防1次对侧腹股沟疝的发生,这将存在过度医疗,同时增加术中睾丸和输精管相关副损伤的危险。因此,本研究主要探讨儿童单侧腹股沟疝术后发生MCIH的影响因素,为单侧腹股沟疝儿童术后MCIH的预防和干预提供依据。方法:回顾性分析2019年1月─2023年9月蚌埠医科大学第二附属医院普通外科102例儿童单侧腹股沟疝患者的临床资料。结果:102例儿童单侧腹股沟疝术后出现MCIH患者共14例(13.7%)。MCIH组和非MCIH组在首次发病年龄、是否为低体质量儿、是否为早产儿方面差异有统计学意义(均P<0.05)。ROC曲线分析结果显示,MCIH首发年龄的截断值为3.5岁。单因素与多因素Logistic回归分析显示,首次发病年龄≤3岁(OR=10.382,95%CI=1.591~67.736,P=0.014)及出生时低体质量(OR=16.480,95%CI=2.714~100.056,P=0.002)是发生MCIH的独立危险因素。结论:首次发病年龄≤3岁及出生时低体质量是儿童单侧腹股沟疝术后MCIH发病的独立危险因素。对于首次发病年龄≤3岁及出生时低体质量,手术方式应选用腹腔镜疝囊高位结扎术以观察对侧是否存在鞘状突未闭,对于未闭的鞘状突进行预防性的结扎,预防MCIH的发生。

关键词：疝,腹股沟结扎术异时性对侧腹股沟疝危险因素

偶氮基作为可离去导向基团辅助的C—H键定向硝化反应:区域专一性地合成邻苯二胺类化合物

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有机化学 2015年第3期35卷 647-654页

作者：张剑张巍任少波崔建海刘运奎浙江工业大学化学工程学院绿色化学与技术国家重点实验室培育基地杭州310014

由苯胺类化合物经传统硝化反应难以区域专一性地制备邻苯二胺类化合物.介绍一种由苯胺类化合物区域专一性地合成邻苯二胺类化合物的方法.即首先由苯胺类化合物制得偶氮类化合物,再经钯催化的偶氮基导向的邻位C—H键定向硝化反应合成邻... 详细信息

由苯胺类化合物经传统硝化反应难以区域专一性地制备邻苯二胺类化合物.介绍一种由苯胺类化合物区域专一性地合成邻苯二胺类化合物的方法.即首先由苯胺类化合物制得偶氮类化合物,再经钯催化的偶氮基导向的邻位C—H键定向硝化反应合成邻硝基偶氮类化合物,最后经Zn/HCOOH体系还原制得邻苯二胺类化合物.在该过程中,钯催化的偶氮基导向的邻位C—H键硝化反应是获得高区域选择性的关键.

关键词：偶氮化合物邻苯二胺硝化钯催化 C—H活化

热处理对Al-Si-Mg-3%Cr合金微观组织与力学性能及耐腐蚀性能的影响

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稀有金属材料与工程 2023年第9期52卷 3179-3185页

作者：崔晓明崔昊赵学平刘飞杜赵新梁绍波白朴存内蒙古工业大学材料科学与工程学院内蒙古呼和浩特010051

采用真空电磁感应熔炼炉制备了Al-Si-Mg-3%Cr合金。利用Thermo-Calc软件进行热力学模拟,使用SEM、EDS等测试方法,表征了不同热处理状态下合金的微观组织,并测试其力学性能。采用失重法和电化学法测试其腐蚀性能。结果表明:合金主要物相... 详细信息

采用真空电磁感应熔炼炉制备了Al-Si-Mg-3%Cr合金。利用Thermo-Calc软件进行热力学模拟,使用SEM、EDS等测试方法,表征了不同热处理状态下合金的微观组织,并测试其力学性能。采用失重法和电化学法测试其腐蚀性能。结果表明:合金主要物相包括α-Al、共晶Si、(Al+Si)共晶、富Cr相(Al13Cr4Si4、β-Al(Cr,Fe)Si)、富Fe相(β-Al5FeSi和π-AlSiMgFe)和Mg2Si。热处理后的合金组织中,共晶Si尺寸变小且球化,共晶组织区域变窄,细小的Al13Cr4Si4、β-Al(Cr,Fe)Si相弥散分布于共晶Si周围,这对改善热处理后合金的力学性能具有积极作用。腐蚀测试结果显示:相比于铸态合金而言,热处理后合金的平均腐蚀速率降低、极化曲线存在明显的钝化区、阻抗中容抗弧变大,表明热处理能够提高合金的耐腐蚀性能。其中T6态(535℃/6 h+160℃/26 h)合金的力学性能及耐腐蚀性最佳。

关键词： Al-Si-Mg合金热处理 Cr元素微观组织力学及耐腐蚀性能

热处理前后选区激光熔化Al-Mn-Mg-Sc-Zr合金微观组织的演变

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稀有金属材料与工程 2023年第5期52卷 1603-1609页

作者：崔晓明梁绍波赵学平崔昊刘飞杜赵新白朴存内蒙古工业大学材料科学与工程学院内蒙古呼和浩特010051

采用选区激光熔化(SLM)技术制备了Al-Mn-Mg-Sc-Zr合金。使用X射线衍射仪、扫描电子显微镜、能谱仪和透射电子显微镜等测试方法,表征了热处理前后Al-Mn-Mg-Sc-Zr合金微观组织的结构,并测试了合金的硬度。结果表明:沉积态合金组织主要由α... 详细信息

采用选区激光熔化(SLM)技术制备了Al-Mn-Mg-Sc-Zr合金。使用X射线衍射仪、扫描电子显微镜、能谱仪和透射电子显微镜等测试方法,表征了热处理前后Al-Mn-Mg-Sc-Zr合金微观组织的结构,并测试了合金的硬度。结果表明:沉积态合金组织主要由α-Al、Al6Mn和初生Al3Sc组成。SLM成形的合金熔池组织呈鱼鳞状,熔池内靠近熔合线附近形成了大量细小的等轴晶,平均晶粒尺寸约为0.57μm,熔池心部则由柱状晶组成,柱状晶的平均宽度约为0.48μm。棒状Al6Mn主要沿晶界分布,少量颗粒状的初生Al3Sc存在于晶粒内部,这表明初生Al3Sc可以作为异质形核质点,细化α-Al基体。热处理后,熔池内部等轴晶尺寸及柱状晶宽度均有所增大,组织中析出了大量细小弥散的二次Al3Sc颗粒。硬度测试结果表明,随着时效时间的延长,各温度条件下合金的硬度值呈先升高后降低的趋势,相比于沉积态合金的硬度,在325℃、180 min时效热处理后合金的硬度提高了30%左右,达到1813.0 MPa。

关键词： Al-Mn-Mg-Sc-Zr合金选区激光熔化技术稀土Sc 热处理微观组织

Whole-genome sequencing provides insights into the genetic diversity and domestication of bitter gourd(Momordica spp.)

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Horticulture Research 2020年第1期7卷 1758-1768页

作者： Junjie cui Yan Yang shaobo Luo Le Wang Rukui Huang Qingfang Wen Xiaoxia Han Nansheng Miao Jiaowen Cheng Ziji Liu Changyuan Zhang Chengcheng Feng Haisheng Zhu Jianwen Su Xinjian Wan Fang Hu Yu Niu Xiaoming Zheng Yulan Yang Dai Shan Zhensheng Dong Weiming He Narinder P.S.Dhillon Kailin Hu College of Horticulture South China Agricultural University/State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Key Laboratory of Biology and Genetic Improvement of Horticultural Crops(South China)Ministry of Agriculture and Rural Affairs510642 GuangzhouChina Tropical Crop Genetic Resources Institute Chinese Academy of Tropical Agricultural Sciences571737 DanzhouChina Vegetable Research Institute Guangdong Academy of Agricultural Sciences510640 GuangzhouChina BGI Genomics BGI-Shenzhen518083 ShenzhenChina Vegetable Research Institute Guangxi Academy of Agricultural Sciences530007 NanningChina Crop Research Institute Fujian Academy of Agricultural Sciences350013 FuzhouChina Institute of Vegetable Research Hunan Academy of Agricultural Sciences410125 ChangshaChina Institute of Vegetables and Flowers Jiangxi Academy of Agricultural Sciences330200 NanchangChina World Vegetable Center East and Southeast AsiaResearch and Training StationKasetsart UniversityKamphaeng SaenNakhon Pathom 73140Thailand

Bitter gourd(Momordica charantia)is a popular cultivated vegetable in Asian and African *** reveal the characteristics of the genomic structure,evolutionary trajectory,and genetic basis underlying the domestication of bitter gourd,we performed whole-genome sequencing of the cultivar Dali-11 and the wild small-fruited line TR and resequencing of 187 bitter gourd germplasms from 16 *** major gene clusters(Bi clusters)for the biosynthesis of cucurbitane triterpenoids,which confer a bitter taste,are highly conserved in cucumber,melon,and *** analysis among cucurbit genomes revealed that the Bi cluster involved in cucurbitane triterpenoid biosynthesis is absent in bitter *** analysis revealed that the TR group,including 21 bitter gourd germplasms,may belong to a new species or subspecies independent from ***,we found that the remaining 166 *** germplasms are geographically differentiated,and we identified 710,412,and 290 candidate domestication genes in the South Asia,Southeast Asia,and China populations,*** study provides new insights into bitter gourd genetic diversity and domestication and will facilitate the future genomics-enabled improvement of bitter gourd.

关键词： insight cluster Whole

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飞灰残碳量对除尘器性能影响规律

煤炭学报 2022年第9期47卷 3463-3471页

作者：夏少波段璐王建朋纪任山崔豫泓张朝煤炭科学研究总院北京100013 北京天地融创科技股份有限公司北京100013 国家能源煤炭高效利用与节能减排技术装备重点实验室北京100013

燃煤工业锅炉应用单一布袋除尘器已难以满足愈发严格的排放标准,电袋除尘器是实现燃煤工业锅炉超低排放的选择之一。基于耦合电袋除尘器实验平台,研究了残碳量对飞灰特性及布袋除尘器和电袋除尘器除尘性能、运行情况及能耗等的影响,结... 详细信息

燃煤工业锅炉应用单一布袋除尘器已难以满足愈发严格的排放标准,电袋除尘器是实现燃煤工业锅炉超低排放的选择之一。基于耦合电袋除尘器实验平台,研究了残碳量对飞灰特性及布袋除尘器和电袋除尘器除尘性能、运行情况及能耗等的影响,结果表明,堆积密度随飞灰残碳量降低而增大,残碳量高于18.18%时增速较慢,低于18.18%时增速较快。与布袋除尘器相比,电袋除尘器出口总尘质量浓度和不同粒径颗粒物质量浓度均降低,总尘脱除效率和分级脱除效率均提高,喷吹周期延长,喷吹压降最低值普遍降低,总能耗均降低,并且残碳量越低,除尘性能越好。布袋除尘器对不同残碳量飞灰有不同穿透窗口,脱除效率随飞灰残碳量降低而提高,而电袋除尘器对残碳量低于18.18%的飞灰无明显穿透窗口。两除尘器喷吹周期均随着喷吹次数增加而减小,压降最低值随着喷吹次数增加而升高。电袋除尘器对4种飞灰的平均喷吹周期分别是布袋除尘器的3.27倍、4.27倍、4.91倍和1.92倍,并且随着飞灰残碳量的降低,布袋除尘器的喷吹周期延长,压降最低值减小,总能耗先减后增,电袋除尘器的喷吹周期则先延长后缩短,压降最低值先减后增,总能耗先增后减,布袋压降是布袋除尘器和电袋除尘器总能耗的主要因素。总体而言,电袋除尘器在除尘性能、长周期运行和能耗等方面均优于布袋除尘器,是燃煤工业锅炉实现超低排放的有效途径之一。

关键词：布袋除尘器电袋除尘器残碳除尘性能压降能耗

Effects of Addition of Amino Acids or Soybean Phospholipid in Diet on Slaughter Performance and Meat Quality of Pigs

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Asian Agricultural Research 2023年第4期15卷 40-43页

作者： Sicong LUO shaobo LI Xiangyun HU Min CHEN Lingxiu GAN Tingju HUANG Wenjie LU Junxiang HUANG Haimei DENG Jiahuang YANG cui YANG Xiuliang LI Guangxi Vocational University of Agriculture Nanning 530007China

[Objectives]The study aims to discuss the effects of addition of arginine and glutamic acid or soybean phospholipid,vitamin E and yeast selenium in diet on the slaughter performance and meat quality of long(white)×large(York)binary hybrid pigs.[Methods]27 long×large castrated hybrid boars with the body weight of(54.4±0.15)kg were randomly divided into 3 groups,with 3 replicates per group and 3 pigs per *** A was the control group,in which the pigs were fed basal diet;in group B,0.8%arginine and 0.60%glutamate were added to the basal diet;in group C,75 g of soybean phospholipid,20 g of vitamin E and 8 g of yeast selenium were added to every 100 kg of the basal *** trial period was 60 *** the experiment was ended,one test pig with similar body weight was selected from each replicate for slaughter and meat determination.[Results]The average weight gain and eye muscle area of the pigs in group B were significantly higher than those in group C(P0.05);there was no significant difference between group B or C and group A in the average weight gain and eye muscle area(P>0.05).There was no significant difference in other slaughter performance between the three groups(P>0.05).Besides,there was also no significant difference in the content of various amino acids,total amino acids and total umami amino acids between the three groups(P>0.05).The inosine content in the longissimus dorsi muscle and muscle cooking loss of binary hybrid pigs in group C were significantly better than those in group B(P0.05);there was no significant difference between group B or C and group A in the inosine content and muscle cooking loss of the pigs(P>0.05).In addition,there was no significant difference in other meat traits and chemical composition of the

关键词： Slaughter performance Meat quality Arginine Glutamic acid Soybean phospholipid Long×large binary hybrid pigs