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Seroprevalence and Epidemiology of Toxoplasma gondii in Animals in the Qinghai-Tibetan Plateau Area,China

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Seroprevalence and Epidemiology of Toxoplasma gondii in Anim...

2021中国畜牧兽医学会兽医寄生虫学分会第二届青年科学家学术论坛

作者： Guojing Li Wangli Zheng Jinfang Yang Tongsheng Qi yongcai he Wangkai Chen hejia Ma Yali Sun Ying Li Ming Kang Jixu Li State Key Laboratory of Plateau Ecology and Agriculture Qinghai University College of Agriculture and Animal Husbandry Qinghai University

Toxoplasma gondii belongs to the Apicomplexan protozoa-an obligate intracellular parasite-causing toxoplasmosis that has a worldwide distribution and is very harmful to both human health and the livestock ***,the information on toxoplasmosis in the Qinghai-Tibetan Plateau Area(QTPA) and the seroprevalence of *** in the food-borne animals in that area has been ***,this study focused on *** and toxoplasmosis to perform an indirect ELISA test based on recombinant TgSAG2 protein to establish a comprehensive record of the seroprevalence of *** infections in a wide range of animals,including Tibetan sheep(Ovis aries),yaks(Bos grunniens),cows,chicken,pigs,and horses,in the ***,the seropositive rates of the *** IgG and IgM antibodies in all investigated animals were 44.1%(1179/2673) and 18.0%(469/2612),*** 14.9%(389/2612) sera were determined to be both IgG and IgM positive samples,30.2%(789/2673)were single-IgG seropositive,and a total of 80 in 2612 animals(3.0%) were single-IgM ***,for the animal species,the pig was the most prevalent animal(90.2%,304/337) for IgG positivity,followed by Tibetan sheep(50.7%,460/907),chickens(45.8%,229/500),yaks(21.1%,140/663),cows(18.5%,38/205) and horses(13.1%,8/61),*** the IgM antibody positivity,the pig was also the most prevalent animal(41.8%,141/337),followed by Tibetan sheep(21.2%,191/907),cows(15.1%,31/205),chickens(12.4%,62/500)and yaks(6.6%,44/663),*** significant differences in the prevalent distribution of *** were found in the different *** conclusion,this study found the high seroprevalence for *** infections among these animal species in the QTPA,and provides new data to facilitate further research for the development of control measures against *** infections in the surveyed locations.

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网孔状手机保护壳注射模设计

制造技术与机床 2016年第10期 150-153页

作者：汪佑思黄胜发何永才广州市黄埔职业技术学校广东广州510730 东莞市赣荣电子有限公司广东东莞523710

根据网孔状手机保护壳塑件特点及工艺分析,按生产需要,采用简化型细水口模架,使用潜伏式点浇口转扇形侧浇口进胶,侧滑块抽芯及内侧扣位直顶强行脱模取出塑件的模具设计方案,解决了塑件脱模难题,同时缩短模具制造周期,节约了成本,提高了... 详细信息

根据网孔状手机保护壳塑件特点及工艺分析,按生产需要,采用简化型细水口模架,使用潜伏式点浇口转扇形侧浇口进胶,侧滑块抽芯及内侧扣位直顶强行脱模取出塑件的模具设计方案,解决了塑件脱模难题,同时缩短模具制造周期,节约了成本,提高了产品的经济性能,获得了不错的成效和社会效益。

关键词：网孔状手机保护壳注射模设计简化细水口模具结构潜伏式点浇口测滑块抽芯强行脱模

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高效硅基异质结太阳电池的ITO薄膜研究

太阳能学报 2020年第4期41卷 1-6页

作者：何永才董刚强张小燕张津岩张永哲严辉北京工业大学材料科学与工程学院北京100124 君泰创新(北京)科技有限公司成都研发中心成都610200 银川能源学院银川750105

研究室温下通过直流磁控溅射方法制备高性能非晶ITO薄膜的光电特性,并分析不同结晶度的ITO薄膜对硅基异质结太阳电池性能的影响。结果表明:非晶态的ITO薄膜具有高的载流子迁移率和高的光学透过率;当退火温度高于190℃时,随退火温度的上... 详细信息

研究室温下通过直流磁控溅射方法制备高性能非晶ITO薄膜的光电特性,并分析不同结晶度的ITO薄膜对硅基异质结太阳电池性能的影响。结果表明:非晶态的ITO薄膜具有高的载流子迁移率和高的光学透过率;当退火温度高于190℃时,随退火温度的上升,薄膜的结晶性逐渐增强,但其光学性能和电学性能都呈逐渐降低的趋势。通过优化退火温度可获得电阻率为4.83×10^-4Ω·cm、载流子迁移率高达35.3 cm^2(/V·s)且长波段相对透过率大于90%的高性能非晶ITO薄膜。对比普通工艺制备的微晶ITO薄膜,在242.5 cm^2的硅基异质结(SHJ)太阳电池上采用非晶ITO薄膜作透明导电膜,其短路电流密度提高0.32 mA/cm^2,可提升电池的光电转换效率。

关键词：非晶薄膜载流子迁移率电学性能电流密度太阳电池 ITO

基于T2WI影像组学标签预测乳腺癌人表皮生长因子受体2表达状态

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中国医学影像技术 2019年第4期35卷 555-559页

作者：梁翠珊崔运能杨伟超贺红艳何永财张大伟佛山市妇幼保健院放射科广东佛山528000

目的探讨基于MR T2WI的影像组学标签在术前预测乳腺癌人表皮生长因子受体2(heR2)表达状态的价值。方法回顾性收集209例乳腺癌患者的T2WI,将患者随机分为训练组(n=145)和验证组(n=64)。手动勾画病灶ROI,并于Matlab 2013a平台中提取组学... 详细信息

目的探讨基于MR T2WI的影像组学标签在术前预测乳腺癌人表皮生长因子受体2(heR2)表达状态的价值。方法回顾性收集209例乳腺癌患者的T2WI,将患者随机分为训练组(n=145)和验证组(n=64)。手动勾画病灶ROI,并于Matlab 2013a平台中提取组学特征。通过组间相关系数及最小绝对收缩和选择算子逻辑回归模型筛选组学特征并构建组学标签。比较heR2表达阳性与阴性亚组患者的影像组学得分差异,采用ROC曲线评价训练组中影像组学标签预测heR2的效能,并以获得的预测阈值用于验证组中进行验证。结果最终获得由13个组学特征构成的影像组学标签。在训练组及验证组中,heR2阳性亚组与阴性亚组患者间组学得分差异均有统计学意义(P均heR2表达状态具有一定价值。

关键词：乳腺肿瘤影像组学受体,表皮生长因子磁共振成像

Molecular detection of Anaplasma,Babesia,Theileria and Spotted Fever Group Rickettsia in yaks(Bos grunniens),Tibetan sheep(Ovis aries) and ticks in the Qinghai-Tibetan Plateau Area,China

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Molecular detection of Anaplasma,Babesia,Theileria and Spott...

2021中国畜牧兽医学会兽医寄生虫学分会第二届青年科学家学术论坛

作者： yongcai he Wangkai Chen Ping Ma Yaoping Wei Ruishan Li Zhihong Chen Shuyu Tian Tongsheng Qi Jinfang Yang Yali Sun Jixu Li Ming Kang Ying Li State Key Laboratory of Plateau Ecology and Agriculture Qinghai University College of Agriculture and Animal Husbandry Qinghai University

The Qinghai-Tibet Plateau Area(QTPA) has a complex natural ecosystem,causing a greatly increased risk of spreading various tick-borne diseases including Anaplasma,Babesia,Theileria and ***,the information of these pathogens in yaks(Bos grunniens),Tibetan sheep(Ovis aries) and ticks in the QTPA,China are *** this study,a total of 1000 samples were collected from 9 sampling sites,including 425 yaks,309 Tibetan sheep and 266 *** study used microscopic examination,PCR and sequencing to confirm the identity of the tick species collected from free environment,yaks and Tibetan sheep from the *** results showed that all ticks collected were identified to be Haemaphysalis qinghaiensis,and the infections of Anaplasma spp., Babesia spp.,Theileria *** detected in yaks and Tibetan sheep,and Spotted Fever Group(SFG) Rickettsia was both detected in animals blood samples and tick vectors from the Qinghai Province in this plateau *** results showed that the total infection rates of Anaplasma ovis, Anaplasma bovis,Anaplasma capra,Anaplasma phagocytophilum,Babesia bovis and Theileria *** all animals were 22.1%(162/734),16.3%(120/734),23.6%(173/734),8.2%(60/734),2.7%(20/734) and 19.3%(142/734),respectively,and the positive rates of SFG Rickettsia were 3.5%(26/734) and 54.1%(144/266) in animals and ticks,***,current study provides the new data for understanding the epidemiology of TBPs in yaks and Tibetan sheep in Qinghai Province in the QTPA,China.

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产前MRI在胎盘植入中的诊断价值

中国医学影像学杂志 2015年第6期23卷 470-473,477页

作者：陈永露宋亭刘祎黄健威何永财广州医科大学附属第三医院放射科广东广州510150

目的评估MRI对产前胎盘植入的诊断价值,初步探讨胎盘植入MRI征象与胎盘植入类型的关系。资料与方法收集54例具有胎盘植入高危因素的孕产妇的产前临床资料及产后手术病理资料,并行常规盆腔MRI检查,扫描序列主要包括T2WI快速自旋回波序列... 详细信息

目的评估MRI对产前胎盘植入的诊断价值,初步探讨胎盘植入MRI征象与胎盘植入类型的关系。资料与方法收集54例具有胎盘植入高危因素的孕产妇的产前临床资料及产后手术病理资料,并行常规盆腔MRI检查,扫描序列主要包括T2WI快速自旋回波序列及平衡式快速场回波序列横断位、矢状位及冠状位,观察MRI征象,并选取胎盘内在3个方位均表现为低信号的区域测量面积,分析T2WI上胎盘低信号带面积与胎盘植入类型的相关性。结果 54例患者的胎盘植入发生率为64.8%(35/54)。主要MRI征象:T2WI呈低信号带37例(68.5%),胎盘内信号不均匀31例(57.4%);胎盘穿透的主要MRI征象为膀胱"帐篷征"(75.0%,6/8)。胎盘植入类型与T2WI低信号带面积呈正相关(r=0.454,P<0.05)。结论胎盘植入的典型间接征象为T2WI上低信号带及胎盘内信号不均匀,且T2WI上胎盘内低信号带面积越大,胎盘植入深度越深。具有胎盘植入高危因素的孕产妇产前需进行影像学评估,特别是MRI检查,以提高疾病检出率。

关键词：胎盘,侵入性磁共振成像产前诊断

总肺体积、肺-肝信号强度比及ADC值评价胎儿肺成熟度的应用价值

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中国中西医结合影像学杂志 2023年第5期21卷 558-561,570页

作者：何永财严杰文曾亦如崔运能广东省佛山市妇幼保健院放射科广东佛山528099

目的:探讨基于MRI测量总肺体积、肺-肝信号强度比及肺平均ADC值评价胎儿肺成熟度的应用价值。方法:收集42例26~39周的胎儿,均行肺部MRI扫描,包括轴位及冠状位单激发自选回波序列(SSFSE)、轴位T_(1)WI和DWI;分别测量并计算出胎儿总肺体... 详细信息

目的:探讨基于MRI测量总肺体积、肺-肝信号强度比及肺平均ADC值评价胎儿肺成熟度的应用价值。方法:收集42例26~39周的胎儿,均行肺部MRI扫描,包括轴位及冠状位单激发自选回波序列(SSFSE)、轴位T_(1)WI和DWI;分别测量并计算出胎儿总肺体积、肺-肝信号强度比及肺平均ADC值,分析其与胎龄的相关性;比较两肺体积及ADC值的差异。结果:42例胎儿,总肺体积26.33~110.74 cm~3,平均(42.46±16.58)cm~3,与胎龄呈正相关(r=0.615,P<0.001)。左、右肺平均体积分别为(26.40±8.94)cm~3、(34.34±11.10)cm~3,差异有统计学意义(t=-11.26,P<0.001)。肺-肝信号强度比为1.45~5.34,平均2.90±0.95,与胎龄呈正相关(r=0.671,P<0.001)。肺ADC值为(1.54~3.23)×10^(-3)mm~2/s,平均(2.91±0.37)×10^(-3)mm~2/s,与胎龄无相关性(P=0.685)。左、右肺平均ADC值分别为(2.51±0.48)×10^(-3)mm~2/s、(2.31±0.50)×10^(-3)mm~2/s,差异无统计学意义(P=0.211)。结论:产前MRI可通过测量胎儿总肺体积及肺-肝信号强度比评价胎儿肺发育成熟度,而肺平均ADC值尚不能作为评价肺发育成熟度的一项参数。

关键词：胎儿肺发育磁共振成像表观扩散系数

An Arithmetical Condition on the Sizes of Conjugacy Classes of a Finite Group

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Algebra Colloquium 2022年第3期29卷 375-384页

作者： yongcai Ren School of Mathematics Sichuan UniversityChengdu 610064China

An element x of a finite group G is said to be primary if the order of x is a prime *** define csp2(G)as follows:if|x^(G)|is a prime power for every primary element x of G,where x^(G) is the conjugacy class of x in G,then csp2(G)=0;if there exists a primary element x in G such that|x^(G)|is divisible by at least two distinct primes,then csp2(G)=max{|x^(G)||x∈Gis primary,|x^(G)|is divisible by at least two distinct primes}.In this paper we discuss the influence of the number csp2(G)on the structure of G.

关键词： finite group primary element conjugacy class size solvable

APPLICATION OF HOMOTOPY METHODS TO POWER SYSTEMS

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Journal of Computational Mathematics 2004年第1期22卷 61-68页

作者： Da-yongcai Yu-rongChen DepartmentofMathematicalSciences TsinghuaUniversityBeijing100084China LaboratoryofParallelComputing InstituteofSoftwareCASBeijing100080China

In this paper, the application of homotopy methods to the load flow multi-solution problems of power systems is introduced. By the generalized Bernshtein theorem, the combinatorial number C2n^m is shown to be the BKK bound of the number of isolated solutions of the polynomial system transformed from load flow equations with generically chosen coefficients. As a result of the general Bezout number, the number of paths being followed is reduced significantly in the practical load flow computation. Finally, the complete P-V cures are obtained by tracking the load flow with homotopy methods.

关键词： Homotopy methods Bezout number Bemshtein-Khoranski-Kushnirenko (BKK) bound Load flow computations