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Statistics on Nonmigrating Diurnal Tides Generated by Tide-Planetary Wave Interaction and Their Relationship to Sudden Stratospheric Warming

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ATMOSPHERE 2018年第11期9卷 416-416页

作者： Niu, Xiaojuan du, Jian Zhu, xuwen Jianghan Univ Dept Phys Wuhan 430000 Hubei Peoples R China Univ Louisville Dept Phys & Astron Louisville KY 40292 USA Univ Louisville Dept Math Louisville KY 40292 USA

The nonmigrating diurnal tide, DW2, is known to have a source from the stationary planetary wave with wavenumber 1 (SPW1) and the migrating diurnal tide (DW1) interaction. Recent research has shown that DW2 time evolution in the equatorial mesopause tracks very well with SPW1 in the polar stratosphere for the winter of 2009-2010, which contains a sudden stratospheric warming (SSW) vortex split event. This paper extends previous research and investigates the relationship between these two waves for 31 winters from 1979 to 2010 with the extended Canadian Middle Atmosphere Model (eCMAM) through correlation and composite analysis. Significant correlations are present between the two waves in 20 out of 31 winters (65%). We separate the 31 winters into four categories: SSW-displacement, SSW-split, minor-SSW, and no-SSW. Our results show that there is no significant difference among the four categories in terms of correlations between the two waves. Although SPW1 is usually stronger during a SSW-D winter, this does not warrant a stronger interaction with DW2.

关键词： nonlinear interaction sudden stratospheric warming planetary waves atmospheric tides

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The immunopotentiator CVC1302 enhances immune efficacy and protective ability of foot-and-mouth disease virus vaccine in pigs

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VACCINE 2018年第52期36卷 7929-7935页

作者： Chen, Jin Yu, Xiaoming Zheng, Qisheng Hou, Liting du, Luping Zhang, Yuanpeng Qiao, xuwen Hou, Jibo Huang, Kehe Nanjing Agr Univ Coll Vet Med Nanjing 210095 Jiangsu Peoples R China Nanjing Agr Univ China Inst Nutr & Metab Disorders Domest Anim & F Nanjing 210095 Jiangsu Peoples R China Jiangsu Acad Agr Sci Inst Vet Immunol & Engn Nanjing 210014 Jiangsu Peoples R China Jiangsu Coinnovat Ctr Prevent & Control Important Yangzhou 225009 Jiangsu Peoples R China

The immunological enhancement characteristics of the immunopotentiator CVC1302 were evaluated for foot-and-mouth disease virus (FMDV) inactivated vaccine in pigs. Eight-week-old piglets were vaccinated with the foot-and-mouth disease (FMD) vaccine alone (FMD-vaccine group) or with the addition of CVC1302 (FMD-CVC1302 group), and the serum liquid phase blocking ELISA (LPB-ELISA) antibody titers, IgG1 and IgG2 levels, and the levels of four cytokines secreted by peripheral blood lymphocytes were measured at 28 days post vaccination (dpv). In the FMD-CVC1302 group, the LPB-ELISA antibody titers, IgG1, and IgG2 titers, and IL-2, IL-4, IL-6, and IFN-gamma levels at 28 dpv were significantly higher than those in the FMD-vaccine group. The FMD-CVC1302 group had long-lasting antibody titers (>7.8 log(2)), lasting for at least 6 months. In addition, piglets were vaccinated with or without addition of CVC1302 to the FMD vaccine at three different doses (1, 1/3, and 1/9 of the standard vaccine dose) and the serum LPBELISA antibody and serum neutralizing (SN) antibody titers were detected at 28 dpv. Then all pigs were challenged with virulent FMDV for PD50 value, and the levels of FMDV-specific RNA copies for the two full-dose groups at 3 and 10 days post challenge (dpc) were measured. The LPB-ELISA and SN antibody titers for the three doses in the FMD-CVC1302 groups were significantly higher than those in the FMD-vaccine groups at the same doses (p < 0.05). Post-virus challenge, the FMDV-specific RNA copy number in the FMD-CVC1302 group was lower than that in the FMD-vaccine group at 3 and 10 dpc. The PD50 value was 15.85 for the FMD-CVC1302 group, which was obviously higher than that for the FMD-vaccine group (10.96), and in the 1/9-dose of FMD-vaccine group only 3/5 pigs were protected. These results indicate that CVC1302 can enhance the immune efficacy and protective ability of the FMD vaccine in pigs. (C) 2018 Elsevier Ltd. All rights reserved.

关键词： Foot-and-mouth disease virus Inactivated vaccine Immunopotentiator CVC1302 Immune efficacy

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Parasitic modes suppression in CW cold tests of 1.3 GHz 9-cell high Q cavities at IHEP

arXiv

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arXiv 2021年

作者： Mi, Zhenghui He, Feisi Pan, Weimin Sha, Peng Zhai, Jiyuan Dai, xuwen Jin, Song Zhang, Zhanjun Dong, Chao Liu, Baiqi Zhao, Hui Ge, Rui Zhao, Jianbing Mu, Zhihui du, Lei Sun, Liangrui Zhang, Liang Yang, Conglai Zheng, Xiaobing Lin, Haiying Wang, Guangwei He, Xiangcong Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Key Laboratory of Particle Acceleration Physics & Technology Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Center for Superconducting RF and Cryogenics Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China University of Chinese Academy of Sciences Beijing100049 China

The CW RF test of 1.3 GHz 9-cell cavity in liquid helium bath at 2 K is a very important key point in the cavity procurement. Some problems can be found through the test, according which to optimized and improve the process of cavity. Recently, Medium temperature (mid-T) furnace bake of 1.3 GHz 9-cell cavities have been carried out at IHEP. Through the proceed of mid-T bake, the quality factor of cavity has been greatly improved. While the excitation of the parasitic modes in the high Q cavities CW cold test has been encountered, which implies an error source for the cavity gradient and quality factor determination. In order to ensure the testing accuracy of superconducting cavity, we have improved the testing system. Finally, the parasitic mode is completely suppressed and the CW RF cold test of high Q cavity is guaranteed. © 2021, CC BY.

关键词： Superfluid helium

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Medium-temperature furnace bake of superconducting radio-frequency cavities at ihep

arXiv

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arXiv 2020年

作者： He, Feisi Pan, Weimin Sha, Peng Zhai, Jiyuan Mi, Zhenghui Dai, xuwen Jin, Song Zhang, Zhanjun Dong, Chao Liu, Baiqi Zhao, Hui Ge, Rui Zhao, Jianbing Mu, Zhihui du, Lei Sun, Liangrui Zhang, Liang Yang, Conglai Zheng, Xiaobing Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Key Laboratory of Particle Acceleration Physics & Technology Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Center for Superconducting RF and Cryogenics Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China University of Chinese Academy of Sciences Beijing100049 China

Recently, heat treatment between 250 °C and 500 °C has been attempted to improve quality factor (Q) of superconducting radio-frequency cavities at FNAL and KEK. Experiments of such medium temperature (mid-T) bake with furnaces have also been carried out at IHEP. Firstly, over ten 1.3 GHz 1-cell cavities were treated with different temperatures at a small furnace, which all demonstrated improvement of Q and anti-Q-slope phenomenon. The average quality factor has reached 3.6×1010 when the gradient is 16 MV/m，while the highest Q is 4.9×1010@16MV/m;the maximum gradients of these 1-cell cavities are between 25.1 and 36.9 MV/m. Then, the recipe of mid-T furnace bake at 300 °C for 3 hours has been applied to six 1.3 GHz 9-cell cavities at a new big furnace, which have all shown higher Q and anti-Q-slope at medium field (16~24 MV/m). The average quality factor has reached 3.8×1010 when the gradient is 16 MV/m. The maximum gradients of the 9-cell cavities are between 22.7 and 26.5 MV/m. © 2020, CC0.

关键词： Radio waves

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活瓣式小肠造瘘术在新生儿腹部外科疾病中的应用分析

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临床小儿外科杂志 2020年第1期19卷 36-39页

作者：王金虎赵绪稳杜晓斌戴春娟胡博包国强天津市儿童医院新生儿外科

目的探讨活瓣式小肠造瘘术在降低新生儿及婴儿小肠造瘘术后并发症中的临床应用价值。方法根据治疗方案的不同将入选的患儿分为活瓣式肠造瘘术组(13例)以及常规肠造瘘术组(10例),其中活瓣式肠造瘘术组采用袢式造瘘的方法,先将肠管浆肌层... 详细信息

目的探讨活瓣式小肠造瘘术在降低新生儿及婴儿小肠造瘘术后并发症中的临床应用价值。方法根据治疗方案的不同将入选的患儿分为活瓣式肠造瘘术组(13例)以及常规肠造瘘术组(10例),其中活瓣式肠造瘘术组采用袢式造瘘的方法,先将肠管浆肌层与腹膜及腹壁肌层缝合固定,在与该缝合层面约一个肠管直径距离处将肠管浆肌层与皮肤、皮下、腹壁肌肉一并缝合固定,使处于腹壁内的肠段形成类似回盲部的“瓣样”皱襞结构。对比活瓣式小肠造瘘术组与常规肠造瘘组术后水电失衡情况,皮肤糜烂、肠管脱出的发生率及排便情况。结果与常规造瘘术组相比,活瓣式造瘘术组患儿每日每百毫升进奶量对应的排便质量显著降低[(25.95±3.39)g vs.(22.23±2.49)g,P<0.05],每日每千克体质量对应的排便质量显著降低[(27.05±3.31)g vs.(23.23±2.64)g,P<0.05],每周体质量增长量显著提高[(136.42±20.23)g vs.(154.27±16.74)g,P<0.05];同时可以有效预防肠管脱出,并减轻瘘口周围皮肤糜烂程度。结论活瓣式小肠造瘘术可以减少肠造瘘口排便内容物中的水分含量,降低新生儿及婴儿小肠造瘘术后并发症的发生率,减轻护理负担,显著改善预后。

关键词：肠造口术婴儿,新生治疗结果

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Quicklime-induced changes of soil properties: Implications for enhanced remediation of volatile chlorinated hydrocarbon contaminated soils via mechanical soil aeration

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CHEMOSPHERE 2017年 173卷 435-443页

作者： Ma, Yan Dong, Binbin He, Xiaosong Shi, Yi Xu, Mingyue He, xuwen du, Xiaoming Li, Fasheng China Univ Min & Technol Sch Chem & Environm Engn Beijing 100083 Peoples R China Chinese Res Inst Environm Sci State Key Lab Environm Criteria & Risk Assessment Dept Soil Pollut Control Beijing 100012 Peoples R China

Mechanical soil aeration is used for soil remediation at sites contaminated by volatile organic compounds. However, the effectiveness of the method is limited by low soil temperature, high soil moisture, and high soil viscosity. Combined with mechanical soil aeration, quicklime has a practical application value related to reinforcement remediation and to its action in the remediation of soil contaminated with volatile organic compounds. In this study, the target pollutant was trichloroethylene, which is a volatile chlorinated hydrocarbon pollutant commonly found in contaminated soils. A restoration experiment was carried out, using a set of mechanical soil-aeration simulation tests, by adding quicklime (mass ratios of 3,10, and 20%) to the contaminated soil. The results clearly indicate that quicklime changed the physical properties of the soil, which affected the environmental behaviour of trichloroethylene in the soil. The addition of CaO increased soil temperature and reduced soil moisture to improve the mass transfer of trichloroethylene. In addition, it improved the macroporous cumulative pore volume and average pore size, which increased soil permeability. As soil pH increased, the clay mineral content in the soils decreased, the cation exchange capacity and the redox potential decreased, and the removal of trichloroethylene from the soil was enhanced to a certain extent. After the addition of quicklime, the functional group COO of soil organic matter could interact with calcium ions, which increased soil polarity and promoted the removal of trichloroethylene.

关键词： Quicklime Mechanical soil aeration Soil Volatile chlorinated hydrocarbons Physical/chemical properties

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Effect of stamping deformation on microstructure and properties evolution of an Al-Mg-Si-Cu alloy for automotive panels

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JOURNAL OF MATERIALS SCIENCE 2017年第10期52卷 5569-5581页

作者： Yang, Mingjun Liu, Siliang He, xuwen Wang, Jiong Kong, Yi Zhao, Pizhi Li, Kai du, Yong Cent S Univ State Key Lab Powder Met Changsha 410083 Peoples R China Suzhou Res Inst Nonferrous Met Dept Fabricat Proc & Technol Aluminum Alloys Suzhou 215026 Peoples R China CHINALCO Res Inst Sci & Technol Dept Fabricat Proc & Technol Aluminum Alloys Beijing 100082 Peoples R China Cent S Univ Inst Mat Microstruct Changsha 410083 Peoples R China

The effect of 5 % tensile deformation, which simulates the stamping process of Al-Mg-Si-Cu automotive outer panels, on the microstructural evolution during age strengthening, has been investigated. In addition, its benefit on key mechanical properties including hardness, yield strength, ductility, and corrosion resistance has been linked to the microstructural features. It was found that the aging precipitation sequence, SSSS -> clusters and G.P. zones -> beta aEuro(3) -> beta' + Q' -> Q, was not influenced by the dislocations introduced through the stamping deformation prior to aging. On the other hand, stamping deformation could promote the formation of precipitates and refine the precipitates because of the enhanced heterogeneous nucleation and the accelerated precipitation kinetics, leading to superior strength of the alloy at the early stage. Meanwhile, the larger amount of Cu incorporated into nanoprecipitates leads to better intergranular corrosion resistance of the stamped alloy compared with the unstamped one. due to the reduction in free Si amount at grain boundaries, the formation of fine subgrain structures and the increase of dislocation accumulation, the ductility of the stamped alloy was increased.

关键词： ALUMINUM-magnesium-silicon alloys DEFORMATIONS (Mechanics) METAL microstructure TENSILE strength DISLOCATIONS in crystals

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乙型脑炎病毒感染猪睾丸细胞的miRNA表达谱差异分析

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南京农业大学学报 2019年第4期42卷 734-739页

作者：张元鹏杨占娜杨利李兰于晓明杜露平陈瑾侯立婷乔绪稳侯继波郑其升江苏省农业科学院动物免疫工程研究所/国家兽用生物制品工程技术研究中心江苏南京210014 南京市栖霞区动物卫生监督所江苏南京210046 江苏省动物重要疫病与人兽共患病防控协同创新中心江苏扬州225009 江苏省食品质量安全重点实验室/省部共建国家重点实验室培育基地江苏南京210014

[目的]本试验旨在分析乙型脑炎病毒(JEV)感染猪睾丸(ST)细胞和正常ST细胞miRNA差异表达谱,以探索miRNA在JEV感染过程中的作用及其调控机制。[方法]分别提取正常ST细胞和JEV感染8h后的ST细胞总RNA,利用高通量测序技术检测分析ST细胞中的m... 详细信息

[目的]本试验旨在分析乙型脑炎病毒(JEV)感染猪睾丸(ST)细胞和正常ST细胞miRNA差异表达谱,以探索miRNA在JEV感染过程中的作用及其调控机制。[方法]分别提取正常ST细胞和JEV感染8h后的ST细胞总RNA,利用高通量测序技术检测分析ST细胞中的miRNA表达谱并进行差异分析。使用miRanda软件对表达差异显著miRNA的靶基因进行预测并对靶基因进行GO分析。选取6个显著性差异表达的miRNA通过RT-qPCR进行验证。[结果]与正常ST细胞相比,JEV感染后的ST细胞有112个差异表达miRNA,其中80个miRNA上调表达,32个miRNA下调表达。经RT-qPCR方法验证6个差异表达的miRNA结果与高通量测序结果一致。差异表达miRNA靶基因的生物学功能相对集中在细胞代谢、细胞黏附等生物过程。[结论]检测和分析JEV感染后猪睾丸细胞的miRNA表达谱,获得了大量的与JEV感染相关的miRNA表达谱数据,为揭示JEV感染生殖系统致病机制提供了有效的数据和理论基础。

关键词：乙型脑炎病毒猪睾丸细胞 miRNA 高通量测序

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中国玉米种子质量:十年变迁和未来展望

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中国种业 2023年第12期 6-10页

作者：鲁苗苗辛婷婷贾濡张佳欣李贺勤赵延明张海艳李朝霞裴玉贺赵美爱韩登旭袁志鹏张巧巧李莉陈全全杜雪梅薛艳芳夏海勇刘铁山汪黎明何军光马云国王宝卿陈景堂宋希云岳海旺顾日良王建华江绪文青岛农业大学青岛266109 山东省聊城市茌平区农业农村局聊城252100 中国农业大学北京100193 新疆农业科学院粮食作物研究所乌鲁木齐860000 山东省农业科学院玉米研究所济南250100 山东省农业科学院作物研究所济南250100 山东鑫丰种业股份有限公司聊城252400 河北省农林科学院旱作农业研究所衡水053000

种子是农业科技的载体,种子质量代表着国家农业科技水平,决定了品种推广范围、播种方式及种子市场竞争力。质量调研作为种子质量保障的一项基础性工作,对推动现代种业高质量发展发挥着重要作用。从包衣包装、4项基本指标测定、种子活力... 详细信息

种子是农业科技的载体,种子质量代表着国家农业科技水平,决定了品种推广范围、播种方式及种子市场竞争力。质量调研作为种子质量保障的一项基础性工作,对推动现代种业高质量发展发挥着重要作用。从包衣包装、4项基本指标测定、种子活力测定、合格率、交流问卷等方面回顾了中国玉米主产区市售品种样品种子质量十年变迁概况,并从种子质量标准认证建设、种企高质量种子生产能力提升、种子质量科普培训及市场监管等方面对玉米种子质量有效控制、保障用种安全提出了一些建设性意见,为推进新时代中国现代玉米产业高质量发展提供参考。

关键词：玉米种子质量种子活力

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LXA1000螺旋分选机在山西潞安余吾矿选煤厂的应用

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选煤技术 2018年第6期46卷 70-74页

作者：张嘉云杜军王亚健孙玉伟张鹏飞公绪文王治帅山西潞安集团余吾煤业有限责任公司山西长治046204 威海市海王旋流器有限公司山东威海264203

阐述了螺旋分选机的分选原理及特点,介绍了LXA1000型螺旋分选机的优点及在山西潞安集团余吾矿选煤厂的应用。生产实践表明,螺旋分选机的精煤产率为82. 59%,不完善度为0. 18,分选数量效率为97. 5%,粗煤泥经螺旋分选机的分选效果良好,经... 详细信息

阐述了螺旋分选机的分选原理及特点,介绍了LXA1000型螺旋分选机的优点及在山西潞安集团余吾矿选煤厂的应用。生产实践表明,螺旋分选机的精煤产率为82. 59%,不完善度为0. 18,分选数量效率为97. 5%,粗煤泥经螺旋分选机的分选效果良好,经济效益可观。

关键词：粗煤泥分选螺旋分选机精煤产率不完善度数量效率

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