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Relationship of inflammatory indices with left atrial appendage thrombus or spontaneous echo contrast in patients with atrial fibrillation

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World Journal of Clinical Cases 2024年第21期12卷 4550-4557页

作者： Zhao Wang Bin-Hao Wang xiao-Lei Yang Yun-Long xia sheng-Min Zhang Ying Che Department of Ultrasonography First Affiliated Hospital of Dalian Medical UniversityDalian 116000Liaoning ProvinceChina Arrhythmia Center First Affiliated Hospital of Ningbo UniversityNingbo 315000Zhejiang ProvinceChina Department of Cardiology First Affiliated Hospital of Dalian Medical UniversityDalian 116000Liaoning ProvinceChina Department of Ultrasonography First Affiliated Hospital of Ningbo UniversityNingbo 315000Zhejiang ProvinceChina

BACKGROUND Inflammatory indices derived from complete blood tests have been reported to be associated with poor outcomes in patients with atrial fibrillation(AF).The data about the relationship between inflammatory indices and left atrial appendage thrombus(LAAT)or dense spontaneous echo contrast(SEC)are *** To explore the value of inflammatory indices for predicting the presence of LAAT or dense SEC in nonvalvular AF *** A total of 406 patients with nonvalvular AF who underwent transesophageal echocardiography were included and divided into two groups based on the presence(study group)or absence(control group)of LAAT or dense *** indices,including the neutrophil-to-lymphocyte ratio(NLR),platelet–tolymphocyte ratio(PLR),and lymphocyte-to-monocyte ratio(LMR),were calculated from complete blood *** associations of inflammatory indices RESULTS LAAT and dense SEC were detected in 11(2.7%)and 42(10.3%)patients,*** PLR only showed an association with LAAT/dense SEC in the univariate *** NLR(odds ratio[OR]=1.48,95%confidence interval[CI]:1.11-1.98,P=0.007)and reduced LMR(OR=0.59,95%CI:0.41-0.83,P=0.003)were found to be independent risk factors for the presence of LAAT/dense *** areas under the NLR and LMR curves for predicting LAAT/dense SEC were 0.73(95%CI:0.66-0.80,Phe cutoff values were 2.8(sensitivity:69.8%;specificity:64.0%)and 2.4(sensitivity:71.7%;specificity:60.6%),*** Increased NLR and decreased LMR may predict LAAT/dense SEC in patients with nonvalvular AF.

关键词： Nonvalvular atrial fibrillation Left atrial appendage thrombus Spontaneous echo contrast Neutrophil–lymphocyte ratio Lymphocyte–monocyte ratio

Design of tightly linked dual ring antenna and imaging of magnetic field distribution using a diamond fiber probe

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Chinese Physics B 2024年第2期33卷 347-352页

作者：叶青云薛雅文何飞越赵旭彤卞雨辰卢文韬王金旭陈鸿浩夏圣开曾明菁杜关祥 College of Telecommunications and Information Engineering Nanjing University of Posts and TelecommunicationsNanjing 210003China College of Science Nanjing University of Posts and TelecommunicationsNanjing 210003China School of Computer Science Nanjing University of Posts and TelecommunicationsNanjing 210023China Bell Honors School Nanjing University of Posts and TelecommunicationsNanjing 210023China

A tightly linked dual ring antenna is designed,and it is specifically tailored for uniformly coupling the microwave magnetic field to the nitrogen-vacancy(NV)*** designed antenna operates at a center frequency of about 2.87 GHz,with a bandwidth of around 200 MHz,allowing it to address multiple resonance peaks in the optically detected magnetic resonance(ODMR)spectrum in an external magnetic ***,the antenna generates a fairly uniform magnetic field in a range with a radius of 0.75 *** resolution imaging of the magnetic field distribution on the surface of the antenna is conducted by using a fiber diamond *** also investigate the effect of magnetic field uniformity on the linewidth of ODMR,so as to provide insights into reducing the inhomogeneous broadening of ODMR.

关键词： nitrogen vacancy(NV) microwave(MW)imaging inhomogeneous broadening

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基于低温性能的温拌沥青及混合料性能研究

应用化工 2024年第8期53卷 1785-1791页

作者：何盛汤雄何兆益吴霞杨亚兵李进重庆交通大学土木工程学院重庆400074 四川省交通建设集团有限责任公司四川成都610041

通过FTIR和TG-DSC实验分别对温拌改性沥青的改性机理和热稳定性进行分析,通过RTFO实验评价温拌改性沥青抗老化性能并对温拌剂配方进行优化;采用DSR实验、BBR实验、测力延度实验评价优化后的温拌改性沥青高低温性能,并与Sasobit和Evother... 详细信息

通过FTIR和TG-DSC实验分别对温拌改性沥青的改性机理和热稳定性进行分析,通过RTFO实验评价温拌改性沥青抗老化性能并对温拌剂配方进行优化;采用DSR实验、BBR实验、测力延度实验评价优化后的温拌改性沥青高低温性能,并与Sasobit和Evotherm M1温拌改性沥青进行对比研究;通过混合料实验对温拌剂的降温幅度和温拌沥青混合料的路用性能进行研究。结果表明,温拌改性沥青的改性机理为物理共混,其热稳定性可以得到保障;温拌剂配方优化后,抗老化能力得到改善;蜡-塑温拌剂加入SBS改性沥青中后-18℃时的蠕变劲度降低37.8%、蠕变速率提升9.9%,低温流变性能得到改善;蜡-塑温拌剂的降温幅度约为23℃,比3%Sasobit和0.5%Evotherm M1的降温效果好,蜡-塑温拌改性沥青混合料的高温性能完全满足低温地区的要求,低温抗裂性能和抗水损害能力有明显提升,Sasobit温拌剂可以提升高温抗车辙性能,但对低温性能和水稳定性不利,Evotherm M1温拌剂对混合料路用性能影响不大。

关键词：道路工程温拌剂低温抗裂性降温幅度路用性能

不同土壤中硅酸盐细菌生理生化特征及其解钾活性的研究

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土壤 2004年第4期36卷 434-437页

作者：何琳燕盛下放陆光祥黄为一南京农业大学生命科学学院微生物学系南京210095

在以钾长石粉为唯一K源的硅酸盐细菌选择性培养基上,从我国部分省市土壤中筛选到16株硅酸盐细菌,以本实验室保藏NBT菌株为参照,对其生理生化特性、耐盐性、抗生素抗性、温度敏感性及释K能力等生物学特性进行了测定.结果表明,17株硅酸盐... 详细信息

在以钾长石粉为唯一K源的硅酸盐细菌选择性培养基上,从我国部分省市土壤中筛选到16株硅酸盐细菌,以本实验室保藏NBT菌株为参照,对其生理生化特性、耐盐性、抗生素抗性、温度敏感性及释K能力等生物学特性进行了测定.结果表明,17株硅酸盐细菌菌体均为杆状,产生椭圆至圆形芽胞.其中SB6、SB13为短杆状,SB4、SB6、SB10、SB15菌株是G+,其余菌株是G-.NH4+、NO3-为良好N源,且能在无N培养基上生长.菌株SB13和NBT解K能力较强,释放的K比接灭活菌对照分别增加49.1%和45.3%.菌株SB2、SB4、SB5、SB6在20g/L NaCl浓度的培养基上能生长,在温度为10℃～40℃范围内供试硅酸盐细菌能够良好生长.

关键词：硅酸盐细菌生理生化特征解钾生物学特性

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氧化铝纤维增强混凝土力学性能试验研究

现代化工 2024年第S1期44卷 124-128页

作者：王伟涛洪刚贺盛文夏伟中铁第一勘察设计院集团有限公司陕西西安710043 云南建投第四建设有限公司陕西西安710082 西安市浐灞生态区空工机场工程技术咨询部陕西西安710051 空军工程大学航空工程学院陕西西安710038

为探究氧化铝纤维对混凝土力学性能的影响,制作了不同氧化铝纤维长度(4 mm、8 mm、12 mm、16 mm)及体积掺量(0.1%、0.2%、0.3%、0.4%、0.5%)的氧化铝纤维增强混凝土试件,并且分别对其开展了抗压及抗折性能测试。结果表明,随着氧化铝纤... 详细信息

为探究氧化铝纤维对混凝土力学性能的影响,制作了不同氧化铝纤维长度(4 mm、8 mm、12 mm、16 mm)及体积掺量(0.1%、0.2%、0.3%、0.4%、0.5%)的氧化铝纤维增强混凝土试件,并且分别对其开展了抗压及抗折性能测试。结果表明,随着氧化铝纤维体积掺量的增加,混凝土的抗压强度和抗折强度均呈现出先逐渐增加而后有所下降的变化趋势;掺入长度为8 mm的氧化铝纤维比另外3种长度的氧化铝纤维对于混凝土抗压、抗折强度的提升作用更加明显。当氧化铝纤维长度为8 mm、体积掺量为0.2%时,氧化铝纤维增强混凝土的抗压强度相较于素混凝土提高了10.59%;当氧化铝纤维长度为8 mm、体积掺量为0.3%时,氧化铝纤维增强混凝土的抗折强度相较于素混凝土提高了26.18%。通过微观形貌分析可知,氧化铝纤维能够与混凝土基体紧密结合,充分发挥阻裂作用、桥接作用,进而有效改善混凝土材料的基本力学性能。

关键词：混凝土氧化铝纤维抗压强度抗折强度折压比微观形貌

Comparative study on emotional behavior and parental job stress of only-child and non-only-child preschool children

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World Journal of Clinical Cases 2024年第21期12卷 4642-4651页

作者： Zhi-Wei Fu Kai-Li Wang Ning-Yu Du Yue-Jing Li Jing-Jing Duan sheng-xia Zhao Department of Children's health Shijiazhuang Maternity and Child Healthcare HospitalShijiazhuang 050000Hebei ProvinceChina

BACKGROUND Studies have revealed that Children's psychological,behavioral,and emotional problems are easily influenced by the family *** recent years,the family structure in China has undergone significant changes,with more families having two or three *** To explore the relationship between emotional behavior and parental job stress in only preschool and non-only preschool *** Children aged 3-6 in kindergartens in four main urban areas of Shijiazhuang were selected by stratified sampling for a questionnaire and divided into only and nononly child *** emotional behaviors and parental pressure were *** and non-only children were paired in a 1:1 ratio by class and age(difference less than or equal to 6 months),and the matched data were *** relationship between children's emotional behavior and parents'job stress before and after matching was *** Before matching,the mother's occupation,children's personality characteristics,and children's rearing patterns differed between the groups(Phe children's parenting styles *** were significant differences in children's gender and parents'attitudes toward children between the two *** Strengths and Difficulties Questionnaire(SDQ)scores of children in the only child group and the Parenting Stress Index-Short Form(PSI-SF)scores of parents were significantly lower than those in the non-only child group(Phere was a positive correlation between children's parenting style and parents'attitudes toward their children(r=0.096,Phe PSI-SF score was positively correlated with children's gender,parents'attitudes toward their children,and SDQ scores(r=0.077,0.193,0.172,0.222).CONCLUSION Preschool children's emotional behavior and parental pressure were significantly higher in multi-child *** pressure in differently

关键词： Only child Family structure Children's emotional behavior Parental stress Tendency score

A breakthrough in direct conversion of methane tooxygenates under mild conditions

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Science China Materials 2018年第7期61卷 1012-1014页

作者： Yan-xia Zhao sheng-Gui he State Key Laboratory for Structural Chemistry of Unstable and Stable Species Institute of Chemistry Chinese Academy of Sciences Beijing 100190China Beijing National Laboratory for Molecular Sciences CAS Research/Education Center of Excellence in Molecular Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China

Methane is an attractive C1 resource for production ofvalue-added chemicals. The current industrial utilizationof methane involves indirect route via preliminary oxi-dation to syngas （a mixture of CO and H2） that can beconverted to desired products [1]. Such two-stage processis energy-intensive. Considerable efforts have been de-voted to developing catalytic processes that can efficientlyand directly transform methane through oxidative ornon-oxidative pathways [2,3].

关键词：材料科学研究

2017~2018年冬季菏泽大气PM_(2.5)中金属元素特征及健康风险评估

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环境科学 2024年第3期45卷 1361-1370页

作者：杜虹萱任丽红赵明升韩慧霞徐义生中国环境科学研究院大气环境研究所北京100012 兰州理工大学石油化工学院兰州730050

于山东省菏泽市采集了2017年10月15日至2018年1月31日期间菏泽学院、华润制药和污水处理厂共3个采样点的大气PM_(2.5)样品,利用电感耦合等离子体质谱仪(ICP-MS)测定PM_(2.5)中21种金属元素的浓度,并讨论元素富集程度、评估重金属的健康... 详细信息

于山东省菏泽市采集了2017年10月15日至2018年1月31日期间菏泽学院、华润制药和污水处理厂共3个采样点的大气PM_(2.5)样品,利用电感耦合等离子体质谱仪(ICP-MS)测定PM_(2.5)中21种金属元素的浓度,并讨论元素富集程度、评估重金属的健康风险和潜在生态风险.结果表明,采样期间3个采样点中ρ(PM_(2.5))范围为26.7~284.1μg·m^(-3)且浓度值差别不大,均处于较高污染水平;3个采样点金属元素中K浓度最高,分别占总量的31.03%、39.47%和38.43%,主要由于菏泽作为较大农业城市,其秋冬季生物质燃烧贡献率较高;3个采样点微量元素中ρ(Zn)最高,分别为89.70、84.21和67.68 ng·m^(-3).富集因子结果表明,Zn、Pb、Sn、Sb、Cd和Se的富集因子值均高于100,其中Cd和Se的富集因子分别高于2 000和4 000,受人为活动影响显著,可能与工业生产、金属冶炼、道路源和燃煤排放等有关.健康风险结果表明,As存在一定的潜在非致癌风险(儿童和成人HQ>0.1),3个采样点对儿童和成人均存在综合潜在非致癌风险(HI>0.1)和一定的潜在致癌风险(CRT>1×10^(-6)),其中污水处理厂对成人的致癌风险较为显著(CRT>1×10^(-4)),成人的致癌风险略高于儿童可能与成人室外活动时间较长和PM_(2.5)暴露量更高有关.潜在生态风险值最高的元素为Cd、As和Pb,其中Cd表现为极高的潜在生态风险,应引起重视;3个采样点均呈现出极高的综合潜在生态风险,强度在空间上表现为:菏泽学院>华润制药>污水处理厂.

关键词： PM_(2.5) 重金属富集因子健康风险评估潜在生态风险

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基于改进SegNet的鸡只检测算法

计算机工程与设计 2024年第1期45卷 102-109页

作者：吉训生孙贝贝夏圣奎江南大学物联网工程学院江苏无锡214122 南通天成现代农业科技有限公司兽医部门江苏南通226000

为实现智能化检测出鸡场中死亡鸡只,提出一种基于改进语义分割模型AT-SegNet的鸡只检测算法。基于对称编码解码结构SegNet,利用空洞卷积在解码前聚合不同感受野的上下文信息,设计一种三尺度注意力级联融合模块,以并联方式嵌入编、解码器... 详细信息

为实现智能化检测出鸡场中死亡鸡只,提出一种基于改进语义分割模型AT-SegNet的鸡只检测算法。基于对称编码解码结构SegNet,利用空洞卷积在解码前聚合不同感受野的上下文信息,设计一种三尺度注意力级联融合模块,以并联方式嵌入编、解码器间,丰富解码器信息。利用多层深度可分离卷积替代标准卷积,提取深层次语义信息,减少计算量提高实时性。将鸡群图像分割结果交并比与阈值对比判别鸡只状态。实验结果表明,改进的AT-SegNet较原算法的检测精度提高了25.17%,能够在复杂鸡群环境中准确、高效地发现死亡鸡只。

关键词：深度学习鸡只检测语义分割编码解码结构注意力机制软池化深度可分离卷积