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Asteroseismology of the DBV star CBS 114

Research in Astronomy and Astrophysics 2016年第8期16卷 17-24页

作者： yan-hui Chen Institute of Astrophysics Chuxiong Normal University School of Physics and Electronical Science Chuxiong Normal University Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of Sciences

Asteroseismology is a unique and powerful tool to investigate the internal structure of stars. CBS 114 is the sixth known pulsating DBV star. It was observed by Handler, Metcalfe, ＆ Wood at the South African Astronomical Observatory over three weeks in 2001. Then, it was observed by Metcalfe et al. for seven nights （2004 Feb. 19-25） on the 1.8 m telescope at the Bohyunsan Optical Astronomy Observatory and seven nights （2004 Feb. 21-27） on the 2.1 m telescope at the McDonald Observatory. Totally two triplets, four doublets, and five singlets were identified. The frequency splitting values are very different, from 5.2 *** to 11.9 ~tHz, which may reflect differential rotations. We evolve grids of white dwarf models by MESA. Cores, added with He/C envelopes, of those white dwarf models are inserted into WDEC to evolve grids of DBV star models. With those DBV star models, we calculate eigenperiods. Those calculated periods are used to fit observed periods. A best-fitting model is selected. The parameters are T^ff ----- 25 000 K, M, = 0.740 MG and log（MHe/M,） = -4.5. With the relatively large stellar mass, the effective temperature is close to the previous spectroscopic result. In addition, kinetic energy distributions are calculated for the best-fitting model. We find that the observed modes with large frequency splitting values are fitted by the calculated modes with a large amount of kinetic energy distributed in the C/O core. After preliminary analysis, we suggest that the C/O core may rotate at least two times faster than the helium layer for CBS 114.

关键词： stars: oscillations (including pulsations) -- stars: individual (CBS 114) -- white dwarfs

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心肌综合指数评价原发性高血压Ⅰ期患者左心整体功能的临床意义

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中国医学工程 2016年第12期24卷 9-12页

作者：刘兴姣周艳玲王晖黄宇翔万锦秀广东省深圳市福田区人民医院心脏中心心血管超声科广东深圳518033

目的探讨心肌综合指数(MPI)评价原发性高血压I期患者左心功能的价值。方法选取该院2014年7月‐2015年7月收治的原发性高血压I期患者及血压正常体检者各200例,所有研究对象均行左心功能和结构检测,并进行了MPI测定,对测值结果进行比较分... 详细信息

目的探讨心肌综合指数(MPI)评价原发性高血压I期患者左心功能的价值。方法选取该院2014年7月‐2015年7月收治的原发性高血压I期患者及血压正常体检者各200例,所有研究对象均行左心功能和结构检测,并进行了MPI测定,对测值结果进行比较分析。结果两组研究对象形态结构、收缩功能比较差异无统计学意义(P>0.05);两组研究对象心肌综合指数比较差异有统计学意义(P<0.05)。结论 MPI能够敏感、综合地评价原发性高血压I期患者左心室收缩、舒张功能。

关键词：心肌综合指数原发性高血压I期左心功能

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猪瘟活疫苗(传代细胞源)免疫产生期和免疫持续期试验

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中国兽医杂志 2017年第4期53卷 92-94,98页

作者：任向阳吴文福岑小清游启有刘秋燕赖月辉黄秋雪广东永顺生物制药股份有限公司广东广州511356 广州出入境检验检疫局广东广州510623

将三批猪瘟活疫苗(传代细胞源)以单剂量分别接种仔猪进行免疫产生期试验。在免疫同时以及免后1、2、3、4、5日连同对照组分别攻击猪瘟强毒,攻毒后观察16天,结果表明,猪瘟活疫苗(传代细胞源)免后4日即可产生坚强的免疫保护力。将三批猪... 详细信息

将三批猪瘟活疫苗(传代细胞源)以单剂量分别接种仔猪进行免疫产生期试验。在免疫同时以及免后1、2、3、4、5日连同对照组分别攻击猪瘟强毒,攻毒后观察16天,结果表明,猪瘟活疫苗(传代细胞源)免后4日即可产生坚强的免疫保护力。将三批猪瘟活疫苗(传代细胞源)以单剂量分别接种仔猪进行免疫持续期试验。在免后3个月、6个月、9个月、12个月、15个月连同对照组分别攻击猪瘟强毒,攻毒后观察16天,结果表明,猪瘟活疫苗(传代细胞源)的免疫持续期可长达15个月。

关键词：猪瘟活疫苗(传代细胞源) 免疫产生期免疫持续期

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Evaluation and application of kinetic models for Cu-catalyzed acetylene hydrochlorination

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Chinese Journal of Chemical Engineering 2024年第8期72卷 209-219页

作者： Tianxiao huang Binhang yan Department of Chemical Engineering Tsinghua UniversityBeijing 100084China

The development of environmentally friendly catalysts has become a top priority for acetylene ***,difficulties remain in systematic studies on the applicability of kinetic models for the industrialization of Cu-based ***,a strategy involving reactor modeling,parameter estimation,and model testing is developed to evaluate the predictive ability of kinetic *** order to search for reliable and widely applicable reaction kinetic models for Cu-based catalysts,a case study is *** possible kinetic models derived from the power law,adsorption mechanism,and reaction path are sifted through collecting and testing activity data from tens of Cu-based *** optimum applicable ranges of these kinetic models are *** to the comparative analysis on their applications in various industrial scenarios,this research suggests that kinetic models derived from reaction path exhibits the best extrapolation ability and has the greatest potential for application in the scale-up design of reactors.

关键词： Acetylene hydrochlorination Cu-based catalysts Reaction kinetics Model Reactors

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Asteroseismology of DAV white dwarf stars and G29–38

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Research in Astronomy and Astrophysics 2013年第12期13卷 1438-1444页

作者： yan-hui Chen yan Li Yunnan Astronomical Observatory Chinese Academy of Sciences Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of Sciences University of Chinese Academy of Sciences

Asteroseismology is a powerful tool used for detecting the inner structure of stars, which is also widely used to study white dwarfs. We discuss the asteroseismology of DAV stars. The period-to-period fitting method is discussed in detail, including its reliability in detecting the inner structure of DAV stars. If we assume that all observed modes of some DAV stars are the l = I cases, the errors associated with model fitting will be always large. If we assume that the observed modes are com- posed of I = 1 and 2 modes, the errors associated with model fitting in this case will be small. However, there will be modes identified as l = 2 that do not have ob- served quintuplets. G29-38 has been observed spectroscopically and photometrically for many years. Thompson et al. made 1 modes identifications in the star through the limb darkening effect. With 11 known I modes, we also study the asteroseismology of G29-38, which reduces the blind l fittings and is a fair choice. Unfortunately, our two best-fitting models are not in line with the previous atmospheric results. Based on factors like only a few observed modes, stability and identification of eigenmodes, identification of spherical degrees, construction of physical and realistic models and so on, detecting the inner structure of DAV stars by asteroseismology needs further development.

关键词： stars: oscillations (including pulsations) - stars: individual (G29-38)- white dwarfs

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融合相似预报方法在陇东南短期强降水预报中的应用

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高原气象 2025年第1期44卷 214-223页

作者：黄晓远李旭杜梦莹叶培龙李艳兰州大学大气科学学院甘肃兰州730000 兰州中心气象台甘肃兰州730020

基于逐步过滤相似法和自组织映射(SOM)神经网络方法,提出了一种融合相似预报方法。利用ECMWF模式预报产品、ERA5再分析资料和地面气象台站观测数据,使用该方法对2021-2022年陇东南地区开展了时效为72 h的强降水预报试验,并对预报效果进... 详细信息

基于逐步过滤相似法和自组织映射(SOM)神经网络方法,提出了一种融合相似预报方法。利用ECMWF模式预报产品、ERA5再分析资料和地面气象台站观测数据,使用该方法对2021-2022年陇东南地区开展了时效为72 h的强降水预报试验,并对预报效果进行了检验。结果表明:(1)融合相似预报方法的TS评分处于4.5%~9.1%之间,与ECMWF模式预报结果相比表现出一定的优势。随着预报时效的增长,强降水预报的TS评分呈现减小的趋势,其在08:00(北京时,下同)起报的TS评分相对较高。(2)相比于单独使用逐步过滤相似预报,融合相似预报方法的准确性有所提升,并能在一定程度上降低空报率。其中08:00起报和20:00起报的TS评分提高了1.31%和0.63%,而FAR同时下降了2.39%和1.25%。

关键词：强降水短期预报相似预报逐步过滤相似自组织映射(SOM)

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基于改进DeblurGAN-v2的运动模糊农作物害虫图像复原方法

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光电子·激光 2025年第1期36卷 46-52页

作者：赵辉黄镖王红君岳有军天津理工大学电气工程与自动化学院天津市复杂系统控制理论与应用重点实验室

为对巡检机器人在巡检过程中产生的运动模糊图像进行高效精准识别，提出了一种基于改进DeblurGAN-v2的运动模糊农作物害虫图像复原方法。为有效提取图像重要特征，该方法将通道注意力(channel attention, CA)机制集成到DeblurGAN-v2主... 详细信息

为对巡检机器人在巡检过程中产生的运动模糊图像进行高效精准识别，提出了一种基于改进DeblurGAN-v2的运动模糊农作物害虫图像复原方法。为有效提取图像重要特征，该方法将通道注意力(channel attention, CA)机制集成到DeblurGAN-v2主干网格中，使模型更加关注细节特征，提高对运动模糊图像的复原能力；此外，在原模型特征提取网络顶层引入空间金字塔池化(spatial pryamid pooling, SPP)缓解图像多尺度变化造成对图像复原的负面影响，提高模型对图像复原的性能。基于实际农田环境建立的数据集所做的实验结果表明，改进后算法的PSNR、SSIM指标分别为26.281 8 dB、0.947 3,较原模型提升了8、7.2个百分点。与其他主流模型的对比实验结果表明，本文方法对模糊图像的实际复原效果更优，对解决运动模糊农作物害虫的图像复原问题具有实际应用价值。

关键词：运动模糊深度学习图像复原 DeblurGAN-v2 通道注意力(CA)机制空间金字塔池化(SPP)模块

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Long-term outcomes of drusenoid pigment epithelium detachment in intermediate AMD treated with 577 nm subthreshold micropulse laser: a preliminary clinical study

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International Journal of Ophthalmology(English edition) 2022年第3期15卷 474-482页

作者： Zhen huang Kai-Yu Deng Yu-Meng Deng yan-Nian hui yan-Ping Song The First School of Clinical Medicine Southern Medical UniversityGuangzhou 510515Guangdong ProvinceChina Department of Ophthalmology General Hospital of Central Theater CommandWuhan 430070Hubei ProvinceChina Department of Ophthalmology Xijing HospitalFourth Military Medical UniversityXi’an 710032Shaanxi ProvinceChina

AIM: To evaluate the long-term anatomical and visual outcomes of drusenoid pigment epithelial detachment(D-PED) in intermediate age-related macular degeneration(AMD) eyes treated with 577 nm yellow subthreshold micropulse laser(SML).METHODS: In this retrospective study, 21 eyes of 16 patients with D-PED in intermediate AMD were consecutively included and *** the eyes were treated with 577 nm SML in several sessions according to D-PED growth *** logarithm of the minimum angle of resolution(logMAR) best-corrected visual acuity(BCVA) were assessed at the initial visit and after ***-domain optical coherence tomography(SD-OCT) was performed to evaluate the D-PED lifecycle by volumetric *** analysis was used to determine the breakpoint, growth, and collapse rate of the D-PED *** progression to advanced AMD was also ***: All the eyes were treated with SML for 2.9±1.0 *** mean follow-up period was 25.3±12.6 *** BCVA was stable from the baseline to final *** the eyes were categorized into two groups according to the anatomical changes of the D-PED lesion: the collapse group(n=6, 28.6%) and non-collapse group(n=15, 71.4%).The change in logMAR BCVA did not differ significantly between the collapse group 0.00(-0.31, 0.85) and non-collapse group 0.00(0.00, 0.00;P=1).Regression analysis showed that the growth rate was significantly higher in the collapse group(0.090±0.095 mm;/mo) than in the non-collapse group(0.025±0.035 mm;/mo;P<0.001).One eye(4.8%) developed macular neovascularization at 11 mo after SML treatment in the non-collapse *** eyes(14.3%) developed geographic atrophy(GA) in the collapse ***: Compared to the natural course of D-PED reported by previous studies, our results preliminarily show that SML can alleviate visual loss and possibility of progression to advanced AMD in eyes with D-PED in intermediate AMD.A controlled clinical trial needs to further ve

关键词： age-related macular degeneration drusenoid pigment detachment optical coherence tomography retinal pigment epithelium subthreshold micropulse laser

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Imazaquin degradation and metabolism in a sandy loam soil amended with farm litters

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Journal of Environmental Sciences 2007年第9期19卷 1108-1113页

作者： WANG hui-li LI yan-yan WEI Guo-hui WANG Xue-dong Key Laboratory of Pesticide and Chemical Biology of Ministry of Education Central China Normal University Wuhan 430079 China

Irnazaquin applied in legume crops has a long residual time in soil, which often impacts safety of the susceptible crops. To increase safety of imazaquin application, two composted litters, bovine manure （BM） and chicken manure （CM）, were used to determine their effects on imazaquin environmental behavior by incorporating each kind of manure into the tested sandy loam soil at 10% （w/w）. The degradation of imazaquin in BM- and CM-amended soil was about 2.4 and 1.5 times, respectively, faster than that in unamended soil. The half-lives of imazaquin in BM-amended soil varied between 6.7 and 15.4 d over the temperature range of 20 to 40℃, and the degradation rate constant （k） increased by a factor of about 1.5 for every 10℃ change. Higher mix ratio did not significantly increase the degradation, and the optimal active degradation of imazaquin was observed approximately at the mix ratio of 10：1 of soil to BM. The different moisture levels had negligible effect on imazaquin degradation. In both unamended and BM-amended treatments, two metabolites were observed at 5, 10 and 30 d after treatment. One metabolite at retention time （RT） of 8.4 rain was identified as 2-（4- hydroxyl-5-oxo-2-imidazolin-2-yl） quinoline acid, originating from the loss of isopropyl group and hydroxylation at the 4-position of imidazolinone ring. The other at RT of 12.9 rain was identified as quinoline-2,3-dicarboxylic anhydride, resulting from detachment of imidazolinone ring and the forming of dicarboxylic anhydride. This finding suggested that the addition of farm litters into soil might be a good management option since it can not only increase soil fertility but also contribute to increase safety of imazaquin application to the following susceptible crops.

关键词： imazaquin farm litter enhanced degradation metabolite

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Effect of Fouling Organisms on Food Uptake and Nutrient Release of Scallop (Chlamys nobilis, Reeve) Cultured in Daya Bay

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Journal of Ocean University of China 2008年第1期7卷 93-96页

作者： SU Zhenxia XIAO hui yan yan huang Liangmin Huaihai Institute of Technology Lianyungang 222005 P. R. China South China Sea Institute of Oceanology Guangzhou 510301 P. R. China

Biofouling is an important factor that affects the bivalve farming industry. Fouling organisms may reduce growth and survival rate of the cultured species. Fouler are often filter feeders, so they are potential competitors for food resource with the cul- tured species. The present study was conducted to measure the impact of fouling on food uptake and nutrient release in April and June, 2006 in Daya Bay near Guangzhou, China. Results showed that fouling organisms had significant effect on food uptake and nutrient release. The chlorophyll a uptake rate of fouled scallops was 7.53 Lh-1 ± 1.416 Lh-1 and 11.94 Lh-1± 2.497 Lh-1 in April and June, respectively, significantly higher than those of cleaned scallops, i.e., 4.23 Lh-1 ± 2.744 Lh-1 and 2.57 Lh-1 ± 1.832 Lh-1 respectively. The consumption of total particulate matter by fouled scallops in April and June was 5.52 Lh-1 ± 0.818 Lh-1 and 3.07 Lh-1 ± 0.971 Lh-1, respectively; the corresponding results for cleaned scallops are 2.49 Lh-1 ± 0.614 Lh-1 and 2.37 ± 1.214 Lh-1, respectively. Fouling in- creased ammonia release significantly. The ammonia release rate of fouled scallops was 33.81 Lh-1±7.699 Lh-1 and 76.39 Lh-1 ± 9.251 Lh-1 in April and June, while cleaned scallops released 2.46 Lh-1 ± 0.511 Lh-1 and 7.23 Lh-1 ± 1.026 Lh-1 ammonia, respectively. Phos- phate release of fouled scallops was 22.72 Lh-1 ± 9.978 Lh-1 in June and cleaned scallops released phosphate 6.01 Lh-1 ± 0.876 Lh-1 in April. Therefore, fouling contributed much to food reduction and concentration increase of ammonia and phosphate in water.

关键词： scallop Chlamys nobilis fouling food uptake nutrient release

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