检索结果-南通市图书馆

与CRKP感染/定植患者人住同一房间增加感染风险—基于ICU的病例对照研究

在线全文

学校读者我要写书评

暂无评论

中华医院感染学杂志 2024年第3期34卷 469-474页

作者：黄文治乔甫朱仕超李婧闻邓宇骅宗志勇张伟四川大学华西医院感染性疾病中心四川成都610000 四川大学华西医院医院感染管理部四川成都610000 四川大学医学院四川成都610000

目的研究与耐碳青霉烯肺炎克雷伯菌(CRKP)感染/定植患者同住一房间是否增加其感染风险.方法于2016年1月-2018年12月于四川大学华西医院ICU病房开展病例-病例对照研究;包括两个病例对照研究,研究1的病例组为CRKP医院感染患者,对照组为未... 详细信息

目的研究与耐碳青霉烯肺炎克雷伯菌(CRKP)感染/定植患者同住一房间是否增加其感染风险.方法于2016年1月-2018年12月于四川大学华西医院ICU病房开展病例-病例对照研究;包括两个病例对照研究,研究1的病例组为CRKP医院感染患者,对照组为未检出CRKP的患者;研究2的病例组为碳青霉烯敏感的肺炎克雷伯菌(CSKP)医院感染患者,对照组为未检出CRKP及CSKP的患者;采用二元Logistic回归分别对CRKP和CSKP两个病例组分析其影响因素.结果共纳入2269名患者作为研究对象,其中研究1的病例组为106例,研究2的病例组为52例;同一房间暴露是CRKP医院感染的危险因素(OR=2.037,95%CJ:1.277~3.251,P=0.003);肺炎克雷伯菌对碳青霉烯耐药的其他危险因素包括急性生理与慢性健康Ⅱ(APACHEⅡ)评分(OR=1.029,95%CI:1.001~1.057,P=0.042)、替加环素(OR=1.944,95%CI:1.245~3.034,P=0.003)、肠外营养(OR=1.998,95%CI:1.052~3.792,P=0.034)、肠道定植(OR=4.160,95%CI:2.702~6.407,P<0.001)、胰腺炎(OR=1.807,95%CI:1.125~2.902,P=0.014)及雾化吸入(OR=2.082,95%CI:1.232~3.520,P=0.006).结论同一房间暴露是CRKP医院感染的危险因素,对可防可控的危险因素应制定具体管理措施及策略,以更有针对性、更科学有效地开展ICU病房的CRKP医院感染防控工作.

关键词：耐碳青霉烯肺炎克雷伯菌病例对照研究同一房间暴露危险因素感染定植 ICU

一种曲柄连杆式惯容器的力学性能与隔震性能研究

在线全文

学校读者我要写书评

暂无评论

工程力学 2024年第8期41卷 36-46页

作者：台玉吉黄智文严爱国华旭刚陈政清湖南大学风工程试验研究中心长沙410082 中铁第四勘察设计院集团有限公司武汉430063

基于惯容器(inerter)的耗能装置近年来受到结构减隔振(震)领域学者的极大关注。该文研究了一种新型惯容器——曲柄连杆式惯容器(CTI)。CTI由曲柄、连杆、齿轮箱和飞轮组成,具有表观质量可调和位移兼容性强等优点。提出了CTI装置与隔震... 详细信息

基于惯容器(inerter)的耗能装置近年来受到结构减隔振(震)领域学者的极大关注。该文研究了一种新型惯容器——曲柄连杆式惯容器(CTI)。CTI由曲柄、连杆、齿轮箱和飞轮组成,具有表观质量可调和位移兼容性强等优点。提出了CTI装置与隔震支座在桥梁抗震中的联合布置形式。推导得到了CTI的表观质量解析表达式,及其线性近似条件。对CTI样机开展了不同表观质量及不同工作姿态下的力学性能试验。以一座典型的三跨变截面连续梁桥为例,采用数值方法研究了CTI在桥梁抗震中的参数设计方法并验证了其可靠性。研究结果表明:CTI可简化为线性惯容器的条件为最大变形应小于曲柄长度的0.312倍,连杆长度应大于曲柄长度的1.803倍。力学性能试验得到的表观质量与理论结果基本一致,通过改变曲柄长度可实现表观质量的精确调节,在线性工作范围内连杆工作姿态对表观质量影响不大。将CTI与隔震支座组合使用可在保证不发生落梁的情况下适度放大主墩顶处隔震支座的变形,提高其耗能效果,从而降低桥梁下部结构的地震响应。

关键词：曲柄连杆惯容器优化设计力学性能试验桥梁抗震

暖季补饲矿物质盐砖对放牧牦牛生长性能、瘤胃发酵、血液和被毛矿物质含量的影响

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

草业学报 2024年第7期33卷 105-118页

作者：杨得玉黄文植冯宇哲薛斌张晓卫崔占鸿青海大学畜牧兽医科学院农业农村部青藏高原放牧牦牛藏羊动物营养与饲草料重点实验室青海省牦牛工程技术研究中心青海省高原放牧家畜动物营养与饲料科学重点实验室青海西宁810016

为探讨放牧条件下补饲矿物质盐砖对牦牛生产力的影响,选取12头2.5岁体重接近[(139±6)kg]的健康公牦牛,随机等分为2组,每组6个重复,开展了全放牧组(CG组)和放牧+补饲矿物质盐砖组(SG组)2个控制性放牧试验,研究了暖季补饲矿物质盐砖对放... 详细信息

为探讨放牧条件下补饲矿物质盐砖对牦牛生产力的影响,选取12头2.5岁体重接近[(139±6)kg]的健康公牦牛,随机等分为2组,每组6个重复,开展了全放牧组(CG组)和放牧+补饲矿物质盐砖组(SG组)2个控制性放牧试验,研究了暖季补饲矿物质盐砖对放牧牦牛生长性能、瘤胃发酵、血液及被毛矿物质含量的影响。结果表明:CG组牦牛总增重为20.75 kg,平均日增重为244 g·d^(-1);SG组牦牛总增重为39.45 kg,平均日增重为464 g·d^(-1),较CG组提高90.12%。SG组牦牛对牧草的干物质消化率(DMD)显著高于CG组(P0.05),试验第60和90天SG组的pH显著低于CG组(P0.05),CG组Na、Co含量显著高于SG组(P0.05),SG组血清Mg、K、Fe、Cu、Zn、Mn、Co含量显著高于CG组(P0.05),CG组被毛Fe含量显著高于SG组(P0.05),SG组被毛中Mg、Fe、Cu、Zn、Mn含量显著高于CG组(P<0.05)。综上,暖季补饲矿物质盐砖能提高牦牛体增重,以及对牧草的养分消化率,促进瘤胃发酵,增加矿物质元素在血液的代谢以及被毛的沉积,改善暖季放牧牦牛矿物质营养平衡状况,挖掘牦牛的生长潜力。

关键词：矿物质盐砖暖季放牧牦牛日增重瘤胃发酵矿物质含量

维普期刊数据库博看期刊

Electro-optic and Photorefractive Properties of Doped Poly (N-Vinylcarbazole)

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 1997年第6期14卷 474-477页

作者： WANG Shu-feng huang zhi-wen CHEN zhi-jian GONG Qi-huang ZHANG zhi-jie CHEN Hui-ying Department of Physics Mesoscopic Physics LaboratoryPeking UniversityBeijing 100871 Department of Chemistry Peking UniversityBeijing 100871

In this work,100μm-thick doped poly(N-vinylcarbazole)films with different contents of the electro-optic(EO)chromophore 2,5-dimethyl-4-(p-nitrophenylazo)anisole and plasticizer N-ethylcarbazole were prepared and sandwiched between two indium-tin oxide-covered glass *** EO measurements and two-beam-coupling experiments were performed by using a single mode(TEM00)He-Ne *** the EO coefficient and the gain for two-beam-coupling were found to be strongly depending on the content of plasticizer.

关键词： Photorefractive coupling beam

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

江湖洪水遭遇下鄱阳湖水动力模拟

中国农村水利水电 2024年第3期 69-77页

作者：张广明王志超吴龙华吴秋琴黄志文邓书盼江西省水利科学院江西南昌330029 河海大学水利水电学院江苏南京210098

鄱阳湖接纳流域内来水,其洪水的形成和发展受鄱阳湖流域来水和长江洪水的双重影响,造成该地区在特定时段极易引发特大洪水。文章分析了江湖作用机制,并基于1959-2009年汉口和湖口洪水资料,统计分析了江湖洪水遭遇及长江洪水倒灌入湖频次... 详细信息

鄱阳湖接纳流域内来水,其洪水的形成和发展受鄱阳湖流域来水和长江洪水的双重影响,造成该地区在特定时段极易引发特大洪水。文章分析了江湖作用机制,并基于1959-2009年汉口和湖口洪水资料,统计分析了江湖洪水遭遇及长江洪水倒灌入湖频次;通过构建鄱阳湖-长江干流二维水动力模型,对江湖顶托加剧情景、江湖顶托相持情景、长江洪水倒灌情景等典型洪水过程进行了重演与分析,将模拟结果与实测水位过程进行验证与误差分析,并应用该模型对1998年极端洪水遭遇过程进行模拟分析。研究结果表明:鄱阳湖洪水一般早于长江洪水出现,两者遭遇主要在6-7月;长江倒灌情景一般发生在长江主汛期,通过统计分析长江洪水的倒灌天数及倒灌水量,反映了江湖顶托强度在年代际尺度上处于此消彼长的波动状态;模型对江湖洪水遭遇典型水位过程与1998年极端洪水遭遇过程的模拟预测精度较高,效果较好,说明模型能够很好地处理鄱阳湖洪水与长江洪水遭遇的高动态变化问题,可为鄱阳湖地区的经济建设和防洪治理提供理论支撑。

关键词：鄱阳湖长江洪水遭遇洪水频率顶托作用水动力模型

Photorefractive Effect in Poly (N-Vinylcarbazole) Composite with Fullerene

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 1997年第11期14卷 842-844页

作者： CHEN zhi-jian XU Li-fang huang zhi-wen GONG Qi-huang ZHANG zhi-jie CHEN Yi-wang CHEN Hui-ying Department of Physics Mesoscope Physics LaboratoryPeking UniversityBeijing 100871 Department of Chemistry Peking UniversityBeijing 100871

The photorefractive effect was observed in poly(N-vinylcarbazole)composite films doped with electro-optic chromophore 2,5-dimetly-4(p-nitrophenylazo)anisole,plasticizer N-ethylcarbazole and different content fullerene *** two-beam coupling experiment was performed by using a cw He-Ne laser at *** two-beam-coupling gain coefficient as higher as 140cm^(-1) was measured at poling dc electric field of 76V/μm and it was also found to be relied on the content of photosensitizer C60.

关键词： carbazole coupling content

BL03HB: a Laue microdiffraction beamline for both protein crystallography and materials science at SSRF

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2024年第7期35卷 68-78页

作者： zhi-Jun Wang Si-Sheng Wang Zheng-huang Su Li Yu Yu-Zhu Wang Bo Sun wen wen Xing-Yu Gao Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai201210China University of Chinese Academy of Science Beijing100049China

A Laue microdiffraction beamline(BL03HB) was constructed at the Shanghai Synchrotron Radiation Facility(SSRF).This beamline features two consecutive focusing points in two different sectors within its end station, the first dedicated to protein crystallography and the other tailored to materials science applications. Based on a superbend dipole magnet with a magnetic field of 2.29 T, a two-stage focusing design was implemented with two sets of Kirkpatrick-Baez mirrors to achieve a micro white beam as small as 4.2 μ m ×4.3 μ m at the first sector and 0.9 μ m ×1.3 μ m at the second sector in the standard beamline operation mode at SSRF. The X-ray microbeam in the two sectors can be easily switched between monochromatic and white beams by moving a four-bounce monochromator in or out of the light path, respectively. In the protein crystallography sector, white-beam Laue microdiffraction was demonstrated to successfully determine the structure of protein crystals from only a few images of diffraction data collected by a Pilatus 2 M area detector. In the materials science sector,the white-beam Laue diffraction was collected in a reflection geometry using another Pilatus 2 M area detector, which could map the microstructural distribution on the sample surface by scanning the samples. In general, the BL03HB beamline promotes the application of Laue microdiffraction in both protein crystallography and materials science. This paper presents a comprehensive overview of the BL03HB beamline, end station, and the first commission results.

关键词： Crystallography White-beam Laue microdiffraction Beamline Synchrotron

Middle Devonian ostracods from Jiwozhai patch reef(Dushan,Guizhou Province,South China):Biostratigraphic and palaeoecological implication

在线全文

学校读者我要写书评

暂无评论

Journal of Palaeogeography 2024年第3期13卷 581-593页

作者： Jun-Jun Song Jia-Yuan huang wen Guo Kun Liang Yu-Cong Sun zhi-Hong Wang wen-Kun Qie State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008Jiangsu ProvinceChina Hubei Key Laboratory of Paleontology and Geological Environment Evolution Wuhan Center of China Geological SurveyWuhan 430205Hubei ProvinceChina University of Chinese Academy of Sciences NanjingNanjing 211135Jiangsu ProvinceChina

The Middle Devonian ostracods from the Jiwozhai patch reef in Dushan, Guizhou Province, South China were described for the first time in this study. Twenty-nine species belonging to 20 genera were identified and figured, including a new species named Wangshangkia jiwozhaiensis sp. nov. The ostracod fauna in the Jiwozhai patch reef represents a Givetian age. The ostracod assemblage belongs to the smooth-podocopid association, which is also ecologically equivalent to the Eifelian Mega-Assemblage Ⅲ. This association is indicative of shallow open-marine environments. The Jiwozhai patch reef fauna is primarily comprised of suspension feeders, including filter-feeding ostracods, corals, brachiopods and bryozoans. Ostracods from the Jiwozhai patch reef were compared to the ostracod faunas from Laurentia-Baltica at generic level, which reveals limited faunal exchanges between South China and Laurentia-Baltica during the Middle Devonian.

关键词： Ostracods Givetian Jiwozhai patch reef Dushan Palaeoecology

Clinical effects of nonconvulsive electrotherapy combined with mindfulness-based stress reduction and changes of serum inflammatory factors in depression

在线全文

学校读者我要写书评

暂无评论

World Journal of Psychiatry 2024年第5期14卷 653-660页

作者： zhi-wen Gu Chun-Ping Zhang Li-Ping Chen Xiong huang Department of Psychiatry Guangzhou First People's HospitalSouth China University of TechnologyGuangzhou 510180Guangdong ProvinceChina Department of Psychiatry The Affiliated Brain Hospital of Guangzhou Medical University(Guangzhou HuiAi Hospital)Guangzhou 510370Guangdong ProvinceChina

BACKGROUND Depression is a common and serious psychological condition,which seriously affects individual well-being and functional *** treatment methods include drug therapy and psychological counseling;however,these methods have different degrees of side effects and *** recent years,nonconvulsive electrotherapy(NET)has attracted increasing attention as a noninvasive treatment ***,the clinical efficacy and potential mechanism of NET on depression are still *** hypothesized that NET has a positive clinical effect in the treatment of depression,and may have a regulatory effect on serum inflammatory factors during *** To assess the effects of NET on depression and analyze changes in serum inflammatory *** This retrospective study enrolled 140 patients undergoing treatment for depression between May 2017 and June 2022,the observation group that received a combination of mindfulness-based stress reduction(MBSR)and NET treatment(n=70)and the control group that only received MBSR therapy(n=70).The clinical effectiveness of the treatment was evaluated by assessing various factors,including the Hamilton Depression Scale(HAMD)-17,self-rating idea of suicide scale(SSIOS),Pittsburgh Sleep Quality Index(PSQI),and levels of serum inflammatory factors before and after 8 wk of *** quality of life scores between the two groups were *** were made using t and χ^(2) *** After 8 wk of treatment,the observation group exhibited a 91.43%overall effectiveness rate which was higher than that of the control group which was 74.29%(64 vs 52,χ^(2)=7.241;P<0.05).The HAMD,SSIOS,and PSQI scores showed a significant decrease in both ***,the observation group had lower scores than the control group(10.37±2.04 vs 14.02±2.16,t=10.280;1.67±0.28 vs 0.87±0.12,t=21.970;5.29±1.33 vs 7.94±1.35,t=11.700;P both<0.001).Additionally,there was a notable decrease in the IL-2,IL-1β,and IL-6 in both gr

关键词： Depression Nonconvulsive electrotherapy Mindfulness-based stress reduction Serum inflammatory factors Clinical effect Hamilton Depression Scale