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基于注意力特征增强的投影图像光度补偿方法

激光与红外 2024年第4期54卷 654-660页

作者：于翠红韩成谢立夏张超长春理工大学计算机科学技术学院吉林长春130022 烟台科技学院山东烟台264000 特种电影技术及装备国家地方联合工程研究中心吉林长春130022

目前,投影补偿算法已经取得了良好的研究成果,但大部分的投影图像色彩补偿研究,忽略了色彩传递函数建模过程中的光学部分,导致对色彩传递函数的建模精确度不高。同时,针对投影图像色彩补偿过程中,出现的加深网络导致提取特征信息丢失的... 详细信息

目前,投影补偿算法已经取得了良好的研究成果,但大部分的投影图像色彩补偿研究,忽略了色彩传递函数建模过程中的光学部分,导致对色彩传递函数的建模精确度不高。同时,针对投影图像色彩补偿过程中,出现的加深网络导致提取特征信息丢失的现象,大多数的深度学习网络优化设计较少。基于以上问题,本文提出了一种基于注意力特征增强的投影图像光度补偿方法。该方法通过增加网络深度来提取带有彩色纹理投影表面的特征信息,同时采用深度学习来拟合复杂的复合辐射传递函数,以解决传统光度补偿方法存在的问题,提高了投影图像的质量和色彩,进一步消除了对高质量投影幕的依赖。本文所提方法的投影图像光度补偿结果,在峰值信噪比(PSNR)、均方根误差(RMSE)和结构相似性(SSIM)三项评价指标上,均好于其他对比算法,与CompenNet系列方法相比,本文所提方法在PSNR评价指标上最高提升5717、在RMSE评价指标上最高减少14968,在SSIM评价指标上最高提升2893。

关键词：注意力机制特征提取投影图像色彩畸变光度补偿

Experimental study of a controlled variable double-baffle distortion generator engine test rig

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Chinese Journal of Aeronautics 2018年第9期31卷 1880-1893页

作者： Aiguo xia Xudong huang Wei TUO Ming ZHOU School of Aerospace Engineering Tsinghua University Beijing Aeronautical Technology Research Center

In order to explore the total-pressure distortion test assessment method for a turbofan engine, a Controlled Variable Double-Baffle Distortion Generator(CVDBDG) with a horizontal symmetry moving form was developed, which can adjust the steady-state and time–variant distortion separately in real time. The inlet total-pressure distortion test was conducted on an afterburner turbofan engine. The distortion parameters of CVDBDG and the instability characteristics of the engine were measured. The experimental data were modeled and analyzed by using back propagation artificial neural networks, and the work envelope of CVDBDG was obtained. Based on the analysis of the data on the engine’s instability, the properties of CVDBDG used for the stability assessment were preliminarily evaluated. The results show that CVDBDG can simulate both steady-state and time–variant distortions simultaneously in a range determined by three *** the condition of symmetric double baffles, a critical depth of insertion exists, beyond which the symmetric baffles will generate an asymmetric flow field. In the case of double baffles, compared to a single baffle, the engine exhibited different instability characteristics. Based on CVDBDG, it is expected that more efficient engine stability and durability assessment methods can be developed.

关键词： Distortion generator Engine stability Inlet flow Inlet total-pressure distortion Turbofan engines

邢台氨减排对京津冀PM_(2.5)改善的溢出效益

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环境科学 2024年第4期45卷 1994-2002页

作者：边泽君闻超玉郎建垒范晓菡夏祥晨周颖北京工业大学环境与生命学部区域大气复合污染防治北京市重点实验室北京100124

氨减排会对周边大气PM_(2.5)污染改善带来潜在的溢出效益,但尚缺乏对其规律的探究.利用WRF-CAMx-PSAT模型模拟量化了典型城市(邢台)NH_(3)减排对周边地区大气PM_(2.5)浓度降低的溢出效益,探究了其在不同季节与不同NH_(3)减排比例下、对P... 详细信息

氨减排会对周边大气PM_(2.5)污染改善带来潜在的溢出效益,但尚缺乏对其规律的探究.利用WRF-CAMx-PSAT模型模拟量化了典型城市(邢台)NH_(3)减排对周边地区大气PM_(2.5)浓度降低的溢出效益,探究了其在不同季节与不同NH_(3)减排比例下、对PM_(2.5)及其二次无机化学组分随距离变化的响应规律.结果表明:(1)NH_(3)减排在不同减排比例下对周边城市的PM_(2.5)及其二次组分均存在溢出效益,其效益随周边受体城市与减排城市相对距离的增加呈显著的指数下降的趋势;(2)在1月的溢出效益远高于7月,1月在不同减排比例下京津冀PM_(2.5)浓度下降值约为7月的7.4倍;(3)各组分溢出范围随着减排比例的增加不断扩大,NH_(4)^(+)和SO_(4)^(2-)的溢出最远距离呈指数趋势上升,NO_(3)^(-)的溢出最远距离呈线性趋势上升;(4)NO_(3)^(-)、NH_(4)^(+)和SO_(4)^(2-)的溢出范围及浓度变化随着减排比例的增加不断上升,其中NO_(3)^(-)溢出范围最远约为NH_(4)^(+)和SO_(4)^(2-)的3.6倍和3.4倍,浓度变化最大约为NH_(4)^(+)和SO_(4)^(2-)的2.6倍和7.3倍.

关键词： NH_(3)减排溢出效益 WRF-CAMx-PSAT模型大气污染京津冀

Roles of membrane and organic fouling layers on the removal of endocrine disrupting chemicals in microfiltration

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Journal of Environmental Sciences 2018年第10期30卷 176-184页

作者： Wenchao Xue Kang xiao Peng Liang xia huang State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Department of Environmental Engineering Faculty of Engineering Chulalongkorn University College of Resources and Environment University of Chinese Academy of Sciences

To understand the adsorption behavior of endocrine disrupting chemicals（EDCs） is important for enhancing the treatment performance and preventing potential secondary pollution caused by EDCs desorption in a microfiltration system. The dynamic adsorption of four representative EDCs, namely estriol（E3）, 17β-estradiol（E2）, 17α-ethynylestradiol（EE2）, and 4-nonylphenol（4-NP） in a microfiltration system was investigated using the Thomas＇ *** product of the equilibrium constant and the total adsorption capacity of the membrane,Ka, for E3, E2, EE2, and 4-NP were 4.91, 9.78, 15.6, and 826, respectively, strongly correlating with the compound octanol–water partition coefficient（KOW）. Adsorption appeared to be enhanced when organic fouling formed on the surface of membrane, indicating the role of an additional adsorption column for EDCs acted by a fouling layer in microfiltration. Results of a comparison between the Ka values for clean membrane and fouled membrane illustrated that the significant contribution made by fouling layers may be attributed to the foulant layer＇s hydrophobicity（in the case of calcium humate layer） and thickness（in the case of calcium alginate layer）. This study provided a novel perspective to quantitatively analyze the dynamic adsorption behavior of trace pollutants in membrane process.

关键词： Endocrine disrupting chemicals Microfiltration membrane Dynamic adsorption Thomas' model Organic membrane fouling

Formation of advanced glycation end products in raw and subsequently boiled broiler muscle:biological variation and effects of postmortem ageing and storage

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Food Science and Human Wellness 2022年第2期11卷 255-262页

作者： Suhong huang xiaoli Dong Yali Zhang yuru Chen Yajie yu Ming huang yuandong Zheng Nanjing Innovation Center of Meat Products Processing Jiangsu Collaborative Innovation Center of Meat Production and ProcessingQuality and Safety Controland College of Food Science and TechnologyNanjing Agricultural UniversityNanjingJiangsu 210095China Nanjing huangjiaoshou Food Science Technology Co. Ltd.National R&D Center for Poultry Processing TechnologyNanjingJiangsu 210095China Henan Province Qi County Yongda Food Industry Co. Ltd.HebiHenan 458000China

The study aimed to investigate and compare the contents of carboxymethyllysine(CML)in two kinds of broilers during postmortem ageing and *** contents of CML in raw and boiled(100℃,30 min)broiler briskets and legs which were from white feather broilers(n=8)and yellow feather broilers(n=8)with ageing and storage at 4℃for 0-168 h were *** ageing and storage had a significant(P0.05)change,while that in boiled brisket meat significantly(P0.05)effect on the CML contents in raw/boiled yellow feather ***,CML contents in white feather broilers were much higher than that in yellow feather ***,white feather broilers can be selected as the research object to study the mechanism of ageing and storage on CML content in the postmortem broiler in the future.

关键词： Carboxymethyllysine Broiler Postmortem ageing Storage Heating

Finite-size analysis of continuous-variable quantum key distribution with entanglement in the middle

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Chinese Physics B 2019年第1期28卷 232-239页

作者： Ying Guo yu Su Jian Zhou Ling Zhang Duan huang School of Physics and Information Science Hunan Normal UniversityChangsha 410006China School of Automation Central South UniversityChangsha 410083China

Continuous-variable quantum key distribution(CVQKD) protocols with entanglement in the middle(EM) enable long maximal transmission distances for quantum communications. For the security analysis of the protocols, it is usually assumed that Eve performs collective Gaussian attacks and there is a lack of finite-size analysis of the protocols. However,in this paper we consider the finite-size regime of the EM-based CVQKD protocols by exposing the protocol to collective attacks and coherent attacks. We differentiate between the collective attacks and the coherent attacks while comparing asymptotic key rate and the key rate in the finite-size scenarios. Moreover, both symmetric and asymmetric configurations are collated in a contrastive analysis. As expected, the derived results in the finite-size scenarios are less useful than those acquired in the asymptotic regime. Nevertheless, we find that CVQKD with entanglement in the middle is capable of providing fully secure secret keys taking the finite-size effects into account with transmission distances of more than 30 km.

关键词： continuous-variable quantum key distribution entanglement in the middle finite-size coherent attack

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缺钾胁迫下谷子转录组分析及相关基因挖掘

中国农业科技导报 2024年第6期26卷 30-44页

作者：鲁一薇夏雪岩赵宇崔纪菡刘猛黄玫红褚程刘建军李顺国河北省农林科学院谷子研究所国家谷子改良中心农业农村部特色杂粮遗传改良与利用重点实验室(部省共建)河北省杂粮研究实验室石家庄050035 河北省杂粮产业技术研究院河北邯郸056000

钾是作物生长不可缺少的元素,挖掘提高作物钾吸收能力的基因,增强作物对缺钾的耐受性具有重要的意义。以‘冀谷45’为供试材料,幼苗长至6叶期时进行缺钾胁迫7 d,通过农艺指标及转录组分析挖掘缺钾胁迫的相关基因。结果表明,缺钾胁迫影... 详细信息

钾是作物生长不可缺少的元素,挖掘提高作物钾吸收能力的基因,增强作物对缺钾的耐受性具有重要的意义。以‘冀谷45’为供试材料,幼苗长至6叶期时进行缺钾胁迫7 d,通过农艺指标及转录组分析挖掘缺钾胁迫的相关基因。结果表明,缺钾胁迫影响谷子的生长发育,株高、叶宽、叶长、茎粗、苗期地上部干重及叶绿素含量低于CK,而根长、根表面积显著增加。转录组分析显示,缺钾胁迫后217个基因表达上调,38个基因表达下调。GO功能富集发现,差异表达基因主要富集于核糖体的结构成分、有机氮化合物代谢过程、蛋白质代谢过程、细胞蛋白质代谢过程、无膜细胞器等类别。KEGG功能富集结果表明,差异表达基因主要富集于核糖体、植物激素信号转导、谷胱甘肽代谢等19个通路。进而筛选出35个与激素表达显著相关的基因,19个氧化应激相关差异表达基因,10个转录因子家族及11个与转导信号相关的基因,1个与氨基酸及核苷酸的糖代谢相关的基因。候选基因Seita.9G193900属于CYP45084A亚家族,调控S型木质素合成的关键酶;Seita.5G365500属于WRKY家族,调控抗病响应基因PAD3等基因的表达;Seita.3G216900是RNA聚合酶Ⅱ转录亚基37E相关介质——HSPA1s辅助蛋白;Seita.4G286000为几丁内质内切酶基因CHIB,调控糖的合成与酵解。以上结果初步揭示了谷子缺钾胁迫相关基因的转录调控,为谷子耐缺钾相关基因的克隆与功能验证奠定基础。

关键词：谷子缺钾差异表达基因转录组

鸡传染性支气管炎病毒组织和细胞嗜性分子机制研究进展

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动物医学进展 2024年第11期45卷 88-93页

作者：李淑芸李通方和俊叶彩燕黄毅尹皑崔敏夏静黄勇眉山职业技术学院四川眉山620010 四川农业大学动物医学院四川成都611130

鸡传染性支气管炎病毒(IBV)引起鸡的传染性支气管炎(IB)可导致鸡呼吸系统、泌尿系统、生殖系统、消化系统的组织病变,不同IBV毒株的组织嗜性及相应细胞嗜性存在差异。病毒基因组上关键基因或位点通过影响病毒复制周期完整性决定组织嗜... 详细信息

鸡传染性支气管炎病毒(IBV)引起鸡的传染性支气管炎(IB)可导致鸡呼吸系统、泌尿系统、生殖系统、消化系统的组织病变,不同IBV毒株的组织嗜性及相应细胞嗜性存在差异。病毒基因组上关键基因或位点通过影响病毒复制周期完整性决定组织嗜性或宿主嗜性,位于IBV S1和S2亚基上的单个或多个位点均能决定其组织嗜性和细胞嗜性,但需要进一步探究这些关键位点改变病毒与宿主互作过程的机制;其他基因对IBV组织和细胞嗜性的影响亟待研究。论文就近年来影响IBV组织和细胞嗜性差异的相关分子机制研究进展进行综述,旨在为IBV致病机制、重组疫苗、抗病毒药物等的进一步研究提供参考。

关键词：传染性支气管炎病毒 S1亚基 S2亚基组织嗜性细胞嗜性

玉龙雪山暖温性针叶林大型真菌资源多样性调查

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中国瓜菜 2024年第5期37卷 81-89页

作者：陈光富吴霞范中玉喻屏滇西应用技术大学招生与就业服务中心云南大理671006 丽江师范高等专科学校应用技术学院云南丽江674199 中国科学院昆明植物研究所昆明650201 滇西应用技术大学测绘与信息工程学院云南大理671006

为厘清玉龙雪山暖温性针叶林大型真菌资源的物种组成,采用样地调查法对玉龙雪山南麓针叶林内的大型真菌与伴生木本植物进行调查与采集。结果表明,有真菌资源22科39属79种,其中毒菌19种,药用菌7种,食用菌46种,还有7种野生菌的资源利用情... 详细信息

为厘清玉龙雪山暖温性针叶林大型真菌资源的物种组成,采用样地调查法对玉龙雪山南麓针叶林内的大型真菌与伴生木本植物进行调查与采集。结果表明,有真菌资源22科39属79种,其中毒菌19种,药用菌7种,食用菌46种,还有7种野生菌的资源利用情况不明;红菇科、牛肝菌科和鹅膏菌科为优势科,鹅膏属、牛肝菌属、红菇属和乳菇属为优势属;生态类型包括粪生真菌、木腐真菌、土壤腐生菌、外生菌根菌和真菌共生菌等5类,以外生菌根菌的种数最多;伴生木本植物有14科17属41种。暖温性针叶林内菌类资源与植物种类组成较为丰富,优势类群明显,极具开发潜力。

关键词：大型真菌玉龙雪山暖温性针叶林资源多样性

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