检索结果-南通市图书馆

A Symmetric-Actuating Linear Piezoceramic Ultrasonic Motor Capable of Producing a Scissoring Effect

在线全文

学校读者我要写书评

暂无评论

Research 2024年第1期2023卷 571-581页

作者： Zhanmiao Li Xingyu Yi Rongqi zhu zhonghui Yu Xiaoting Yuan MohammadJavad PourhosseiniAsl Shuxiang Dong School of Materials Science and Engineering Peking UniversityBeijing 100871China College of Mechatronics and Control Engineering and Institute for Advanced StudyShenzhen UniversityShenzhen 518051China

Conventionally,to produce a linear motion,one motor’s stator is employed to drive one runner moving forward or *** far,there is almost no report of one electromechanical motor or piezoelectric ultrasonic motor that can directly generate two symmetrical linear motions,while this function is desired for precise scissoring and grasping in the minimally invasive surgery ***,we report a brandnew symmetric-actuating linear piezoceramic ultrasonic motor capable of generating symmetrical linear motions of two outputs directly without additional mechanical transmission *** key component of the motor is an(2×3)arrayed piezoceramic bar stator operating in the coupled resonant mode of the first longitudinal(L_(1))and third bending(B_(3))modes,leading to symmetric elliptical vibration trajectories at its two ends.A pair of microsurgical scissors is used as the end-effector,demonstrating a very promising future for high-precision microsurgical operations.

关键词： field symmetric backward

Current dilemma in photocatalytic CO_(2) reduction:real solar fuel production or false positive outcomings?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

碳中和(英文) 2022年第1期1卷 491-506页

作者： Kai Zhang Qi Gao Cuiping Xu Dawei Zhao Qibin zhu zhonghui zhu Jin Wang Cong Liu Haitao Yu Chen Sun Xianglei Liu Yimin Xuan College of Energy and Power Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016People’s Republic of China Key Laboratory of Thermal Management and Energy Utilization of Aviation Vehicles Ministry of Industry and Information TechnologyNanjing 210016JiangsuChina

Solar driven carbon dioxide(CO_(2))recycling into hydrocarbon fuels using semiconductor photocatalysts offers an ideal energy conversion pathway to solve both the energy crisis and environmental degradation ***,the ubiquitous presence of carbonaceous contaminants in photocatalytic CO_(2) reduction system and the inferior yields of hydrocarbon fuels raise serious concerns about the reliability of the reported experimental *** in this perspective,we focus on the accurate assessment of the CO_(2) reduction products,systemically discuss the possible sources of errors in the product quantification,elaborate the common mistakes spread in the analysis of reaction products obtained in 13CO_(2) labelling experiments,and further propose reliable protocols for reporting the results of these isotopic tracing ***,the challenges and cautions in the precise measurement of O_(2) evolution rate are also depicted,and the amplification of the concentration of O_(2) in photoreactors well above the limit of detection is still demonstrated to be the most effective solution to this troublesome *** hope the viewpoints raised in this paper will help to assessment the reliability of the reported data in future,and also benefit the beginners that intend to dive in the photocatalytic CO_(2) reduction area.

关键词： Artificial photosynthesis Solar fuels Photocatalytic CO_(2)reduction Pitfalls Isotopic tracing False positive results

A New Micropropagation Technology of Tilia amurensis:In VitroMicropropagation of Mature Zygotic Embryos and the Establishment of a PlantRegeneration System

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Phyton-International Journal of Experimental Botany 2024年第2期93卷 277-289页

作者： Shijie Lin Zimo Wang Hongbo zhu Conghui Wang Hongfeng Wang Dawei Zhang Tianbing Gou Guangdao Bao Ye Luo Huaijiang He zhonghui Zhang Jilin Provincial Academy of Forestry Sciences(Jilin Forestry Biological Control Central Station) Changchun130033China Institute of Forestry Inventory and Planning of Jilin Province Changchun130022China Jilin Forest Tree and Seeding Management Station Changchun130022China

Tilia amurensis is an economically valuable broadleaf tree species in Northeast *** production of *** varieties at commercial scales has been greatly limited by the low germination *** thus a pressing need to develop an organogenesis protocol for in vitro propagation of *** to alleviate ashortage of high-quality *** ***,we established a rapid in vitro propagation system *** from mature zygotic embryos and analyzed the effects of plant growth regulators and culture mediain different *** found that Woody plant medium(WPM)was the optimal primary culture medium formature zygotic *** highest callus induction percentage(68.76%)and number of axillary buds induced(3.2)were obtained in WPM+0.89μmol/L 6-benzyladenine(6-BA)+0.46μmol/L kinetin(KT)+0.25μmol/Lindole-3-butryic acid(IBA)+1.44μmol/L gibberellin A_(3)(GA_(3)).The multiple shoot bud development achievedthe highest percentage(83.32%)in the Murashige and Skoog(MS)+2.22μmol/L 6-BA+0.25μmol/L IBA+1.44μmol/L GA_(3).The rooting percentage(96.70%)was highest in 1/2 MS medium+1.48μmol/L *** percentage of transplanting plantlets was 82.22%in soil:vermiculite:perlite(5:3:1).Our study is the firstto establish an effective organogenesis protocol for *** using mature zygotic embryos.

关键词： Tilia amurensis Rupr. mature zygotic embryo micropropagation adventitious bud multiplication rooting

MicroRNA-29b inhibits supernatants from silica treated macrophages from inducing extracellular matrix synthesis in lung fibroblasts

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

MicroRNA-29b inhibits supernatants from silica treated macro...

尿mAlb、血清Cys C、血BUN及血肌酐联合检测在高血压肾病诊断中的临床价值分析

2018环境与健康学术会议--精准环境健康：跨学科合作的挑战

作者： zhonghui zhu Ximeng Lian Xiaowei Chen Jingping Sun Yan Wang Lin Tian School of Public Health Capital Medical University

Objectives Silicosis is pathologically characterized by diffused pulmonary fibrosis and abundant deposition of extracellular matrix(ECM) *** ECM is mainly secreted by myofibroblasts which are the activated state of ***-29 b(miR-29 b) is one of the well-known microRNAs involved in fibrosis,but its roles in silicosis have not been *** In this study,we hypothesized that miR-29 b might play a protective role in the progression of *** assay,qRT-PCR,immunofluorescence and western blotting were *** The results demonstrated that the supernatants from silica-treated macrophages not only caused the proliferation of fibroblasts(NIH-3 T3 and MRC-5)but were also involved in the downregulation of miR-29 *** they could induce fibroblast activation,increasing the expression of ECM components such as collagen 1 and collagen3,in a silica dose-dependent ***,overexpression of miR-29 b by transfecting mimics markedly reduced the expression of ECM components and inhibited ECM *** These findings indicate that miR-29 b inhibits the supematants from silica treated macrophages from inducing extracellular matrix synthesis,thus miR-29 b might have a strong anti-fibrotic capacity in silicosis and serve as a potential therapeutic agent for the treatment.

关键词： miR-29b silica fibroblast

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

首都食品与医药 2022年第19期29卷 96-98页

作者：朱忠慧山东省单县中心医院山东菏泽274300

目的探讨尿mAlb、血清Cys C、血BUN及血肌酐联合检测在高血压肾病诊断中的临床价值.方法选取2020年8月-2022年1月收治的106例高血压肾病患者、单一高血压患者87例、健康者58例作为研究对象,各研究对象均接受尿mAlb、血清Cys-C、血BUN... 详细信息

目的探讨尿mAlb、血清Cys C、血BUN及血肌酐联合检测在高血压肾病诊断中的临床价值.方法选取2020年8月-2022年1月收治的106例高血压肾病患者、单一高血压患者87例、健康者58例作为研究对象,各研究对象均接受尿mAlb、血清Cys-C、血BUN及血肌酐检测,分析单一检测与各项指标联合检测的敏感性、特异性等.结果高血压肾病组患者Scr、血清BUN、血清Cys C、尿mAlb高于高血压组、健康组,高血压组高于健康组,差异有统计学意义(P<0.05);联合检测阳性率92.45%高于单项检测阳性率(尿mAlb76.42%、血清Cys C77.36%、血BUN74.53%及血肌酐指标78.30%),差异有统计学意义(P<0.05);联合检测敏感性92.13%、特异性83.33%、阴性预测值90%、阳性预测值82.65%高于尿mAlb(74.07%、55.56%、58.33%、52.94%)、血清Cys C(71.79%、53.33%、60.00%、69.32%)、血BUN(73.75%、66.67%、61.54%、66.29%)及血肌酐指标(74.70%、57.89%、58.33%、57.78%),差异有统计学意义(P<0.05).结论尿mAlb、血清Cys C、血BUN及血肌酐指标与高血压肾病病情程度之间呈正性关系,且联合检测的敏感性、特异性、准确性均比单一检测更高.

关键词：尿mAlb 血清Cys C 血BUN 血肌酐高血压肾病检测

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

腹腔镜手术治疗急性结石性胆囊炎的临床价值

当代医学 2018年第27期24卷 40-42页

作者：朱忠辉启东市人民医院普外二科江苏启东226200

目的探讨腹腔镜手术治疗对急性结石性胆囊炎患者施的临床效果。方法选择启东市人民医院2016年1月～2017年12月收治的82例急性结石性胆囊炎患者作为研究对象;采用数字奇偶法为对照组和观察组,各41例,对照组给予传统开腹手术治疗,观察组... 详细信息

目的探讨腹腔镜手术治疗对急性结石性胆囊炎患者施的临床效果。方法选择启东市人民医院2016年1月～2017年12月收治的82例急性结石性胆囊炎患者作为研究对象;采用数字奇偶法为对照组和观察组,各41例,对照组给予传统开腹手术治疗,观察组给予腹腔镜手术治疗,比较两组患者术中失血量、临床手术时间、镇痛药物使用量、肛门排气时间、VAS疼痛评分结果、下床活动时间以及并发症总发生率的差异。结果观察组患者术中失血量、临床手术时间以及镇痛药物使用量均少于对照组,差异具有统计学意义(P<0.05),观察组患者肛门排气时间、VAS评分以及下床活动时间均少于对照组,差异具有统计学意义(P<0.05),观察组患者总并发症发生率低于对照组,差异具有统计学意义(P<0.05)。结论急性结石性胆囊炎患者选择腹腔镜手术临床效果显著,利于患者恢复。

关键词：腹腔镜手术急性结石性胆囊炎临床效果

MicroRNA-29b inhibits silica-induced epithelial-mesenchymal transition and lung fibrosis

在线全文

学校读者我要写书评

暂无评论

MicroRNA-29b inhibits silica-induced epithelial-mesenchymal ...

基于Automation Studio地下铲运机液压系统改进设计分析

2018环境与健康学术会议--精准环境健康：跨学科合作的挑战

作者： Jingping Sun Yan Wang Qiuyue Li Wanying Pei Xiaowei Chen Ximeng Lian zhonghui zhu Siling Li Lin Tian Department of Occupational Health and Environmental Health School of Public HealthCapital Medical University

Objectives To elucidate whether microRNA-29 b(miR-29 b) could inhibit silica-induced epithelial-mesenchymal transition(EMT) and lung fibrosis in *** A total of forty C57 BL/6 J mice were randomly divided into four groups:the control,silica,silica + NC,and silica + agomiR-29 b group(n=10).Firstly,the mice were anesthetized with ether and administered with silica suspension *** except for mice in the control group which received the same volume of saline *** 8 th day after silica instillation the mice in the silica + NC and silica + agomiR-29 b groups were injected with negative control or agomiR-29 b at a concentration of25 nmol/mL through tail vein every three *** mice were sacrificed on day 28 after silica *** upper parts of the right lungs were collected for detection of hydroxyproline,and the lower parts of the right lungs were used to examine the gene expression of EMT markers,while the left lungs were fixed in formalin for further pathological ***(1) HE and Masson staining revealed that silica exposure thickened the alveolar septa,increased numbers of cell nodules and areas of collagen fibers in the lung of the *** hydroxyproline assessment presented that silica induced an obvious increase in the lung(p<0.05) and immunohistochemistry showed that the protein expression of a-SMA in the silica group increased *** suggested that the mice model of silicosis were successfully established.(2) The injection of agomir-29 b decreased silica-induced lung fibrosis significantly as evidenced by the thickness of the alveolar septum,the decreased number of cell nodules and the area of the blue ***-29 b also decreased the content of hydroxyproline and the protein expression of a-SMA in the lung compared with those in the silica+NC group(p<0.05).These results demonstrated that miR-29 b could attenuate silica-induced pulmonary fibrosis in mice.(3) Next the preventive role of miR-29 b on EMT was exam

关键词： silica microRNA-29b lung fibrosis

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

机床与液压 2017年第10期45卷 82-87页

作者：赵世婧郭天宇朱忠辉苏州农业职业技术学院智慧农业学院江苏苏州215008 江苏大学能源与动力工程学院江苏镇江212013

地下铲运机工作环境恶劣,装-运-卸及行走、制动、转向等都需要液压系统,系统性能和可靠性直接影响到整车的性能和寿命。根据ACY-2型地下铲运机液压系统的结构特点,参考TORO007液压系统对ACY-2型地下铲运机进行改进,根据经典设计经验值,... 详细信息

地下铲运机工作环境恶劣,装-运-卸及行走、制动、转向等都需要液压系统,系统性能和可靠性直接影响到整车的性能和寿命。根据ACY-2型地下铲运机液压系统的结构特点,参考TORO007液压系统对ACY-2型地下铲运机进行改进,根据经典设计经验值,将轮胎与地面间的综合阻力系数从0.5降低到0.16;减小转向油缸的缸径,改变双联泵的排量;将制动系统由原来的液压制动改为弹簧制动;基于Automation Studio对改进前、后液压系统进行建模分析,对系统参数进行适当调整;对比分析改进后与原设计液压系统的相关参数及转向、制动性能,结果可知:改进后制动系统更加安全可靠,减低了系统中的压力,减小了局部的压降,具有更优的效果。研究结果为此类改进设计及生产提供参考。

关键词：地下铲运机液压系统改进设计

在线全文

学校读者我要写书评

暂无评论

双毛细管静电雾化模式试验

江苏大学学报（自然科学版） 2018年第3期39卷 284-289页

作者：王贞涛朱忠辉夏磊张永辉李睿洁华控股股份有限公司博士后科研工作站浙江海宁314419 江苏大学能源与动力工程学院江苏镇江212013

采用带有显微变焦镜头的高速摄像技术对不锈钢双毛细管产生的静电雾化现象进行了可视化研究.以无水乙醇和去离子水为雾化介质,采用高速相机以104Hz的拍摄频率记录静电雾化图像,通过对大量图像的离线对比分析,获得了双毛细管静电雾化模式... 详细信息

采用带有显微变焦镜头的高速摄像技术对不锈钢双毛细管产生的静电雾化现象进行了可视化研究.以无水乙醇和去离子水为雾化介质,采用高速相机以104Hz的拍摄频率记录静电雾化图像,通过对大量图像的离线对比分析,获得了双毛细管静电雾化模式,并与单毛细管静电雾化模式进行对比.试验结果表明:在无水乙醇静电雾化中观察到了滴状、斜滴状、纺锤、锥射流、鞭式射流与多股射流等多种雾化模式,而去离子水静电雾化中存在滴状、斜滴状、纺锤、锥射流以及振荡射流等雾化模式;双毛细管静电雾化中,除电压较低的滴状模式外,其余雾化模式中雾化射流中心线与毛细管轴线之间的呈现出不同的夹角,夹角与雾化模式和流量均有关;不同的雾化模式下,雾滴的粒径分布也有显著差别;在相同的试验范围内,无水乙醇和去离子水的表面张力不同,静电雾化模式不同,无水乙醇能够呈现出更多的雾化模式,雾滴粒径更为细小,射流与雾滴的界面更加光滑.

关键词：静电雾化雾化模式雾滴双毛细管显微高速数码相机