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Ultrasound-guided cannulation of the internal jugular vein in robotic cardiac surgery

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Chinese Medical Journal 2013年第13期126卷 2414-2417页

作者： wang Yao wang Gang GAO chang-qing Department of Cardiovascular Surgery Chinese People's LiberationArmy General Hospital Beijing 100853 China (Wang Y Wang Gand Gao CQ)

Background Robotic assisted minimally invasive cardiac sugery is a new technique that uses small port sites and peripheral vessel cannulation for cardiopulmonary bypass （CPB） has been used. The right internal jugular vein （IJV） is commonly used for intraoperative venous access to the central circulation and identified with an external landmark. Previous studies have demonstrated the superiority of ultrasound guidance over external landmark technique in anaesthetic and intensive care settings. The aim of the present study was to delineate the utility of ultrasound-guided cannulation of the IJV during establishment of peripheral CPB in robotic cardiac surgery. Methods We prospectively studied 296 adult patients undergoing ultrasound-guided right IJV cannulation during establishment of peripheral CPB in robotic cardiac surgery at our institute from January 2007 to October 2012 （ultrasound group）. The success rate, the first attempt success rate, access time and the complication rate of ultrasound-guided method were compared with the landmark-guided method used for 302 historical control patients （landmark group）. Results In the ultrasound group, 296 consecutive adult patients underwent ultrasound-guided right IJV cannulation during establishment of peripheral CPB in robotic cardiac surgery. In the landmark group, 302 patients underwent right IJV cannulation using the landmark-guided technique. The success rate and the first attempt success rate in the ultrasound group were significantly higher than that in the landmark group （100% vs. 88.1%, P 〈0.000 and 98.6% vs. 38.4%, P 〈0.000）. Average access time in the ultrasound group was shorter than that in the landmark group （（6.3＋13.6） seconds; interquartile range （4-62） seconds vs. （44.5＋129.5） seconds; interquartile range （5-986） seconds）. The complication rate in the ultrasound group was significantly lower than that in the landmark group （0.3% vs. 8.3%, P 〈0.000）. Conclusion Compared with the landmark-guided approach, ul

关键词： ultrasonography interventional central venous," minimally invasive surgical procedures robotic cardiac surgery, cardiopuImonary bypass

Transesophageal echocardiography guided cannulation for peripheral cardiopulmonary bypass during robotic cardiac surgery

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Chinese Medical Journal 2012年第18期125卷 3236-3239页

作者： wang Yao GAO chang-qing wang Gang wang Jia-li Cardiovascular Surgery Institute and Department ofCardiovascular Surgery Chinese People's Liberation ArmyGeneral HospitalChina Beiiing 100853

Background Minimally invasive cardiac surgery and closed chest cardiopulmonary bypass （CPB） techniques continue to evolve. Previous reports have demonstrated the benefits of fluoroscopy guided cannulation for endovascular CPB during port access cardiac surgery. However, few data are available on the role of transesophageal echocardiography （TEE） guided cannulation for peripheral CPB during robotic cardiac surgery. The purpose of this study was to evaluate TEE guided cannulation for peripheral CPB during robotic cardiac surgery. Methods We performed a retrospective analysis of intraoperative data of 129 consecutive patients underwent robotic cardiac surgical procedures requiring peripheral CPB from September 2007 to August 2011, which was established using femoral arterial inflow and kinetic venous drainage by way of the femoral vein and right internal jugular vein and a transthoracic aortic cross clamp. TEE was used to guide cannulation of the inferior vena cava （IVC）, superior vena cava （SVC）, and ascending aorta （AAO）. The success rate and the complication rate of TEE guided cannulation for peripheral CPB were evaluated and compared with the results of fluoroscopy guided cannulation in a historical control group. Results One hundred and twenty-nine consecutive patients underwent robotic cardiac surgical procedures requiring peripheral CPB. There were 67 female （51.9%） and 62 male （48.1%） patients, ranging in age from 13 to 70 years （mean （43.94 ± 13.82） years） and body surface area 1.32 to 2.39 m2 （mean （1.71± 0.20） m2）. Some 61 （47.3%） patients underwent mitral valve repair, 27 （20.9%） mitral valve replacement, 27 （20.9%） left atrial myxoma removal, and 14 （10.9%） ventricular septal defect repair. Of the 129 patients, TEE guided cannulation of the IVC or SVC was successful in all patients （100%）, and no puncture related complications occurred in all patients. Of the 129 patients, successful cannulation of the AAO was achieved in all patients （100%）, and aortic pe

关键词： transesophageal echocardiography cardiopulmonary bypass," robotic cardiac surgery

Echocardiographic Follow-up of Robotic Mitral Valve Repair for Mitral Regurgitation due to Degenerative Disease

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Chinese Medical Journal 2016年第18期129卷 2199-2203页

作者： Yao wang chang-qing Gao Yan-Song Shen Gang wang Department of Cardiovascular Surgery Chinese People's Liberation Army General Hospital Beijing 100853 China

Background： Mitral valve （MV） repair can now be carried out through small incisions with the use of robotic assistance. Previous reports have demonstrated the excellent clinical result of robotic MV repair for degenerative mitral regurgitation （MR）. However, there has been limited infomlation regarding tile echocardiographic follow-up of these patients. The present study was therefore to evaluate the echocardiographic follow-up outcomes after robotic MV repair in patients with MR due to degenerative disease of the MV. Methods： A retrospective analysis was undertaken using data from the echocardiographic database of our department. Between March 2007 and February 2015, 84 patients with degenerative MR underwent robotic MV repair. The repair techniques included leaflet resection in 67 patients （79.8%）, artificial chordae in 20 （23.8%）, and ring annuloplasty in 79 （94.1%）. Eighty-one （96.4%） of the 84 patients were eligible for echocardiographic follow-up assessment, and no patients were lost to follow-up. Results： At a median echocardiographic follow-up of 36.0 months （interquartile range 14.3-59.4 months）, lbur patients （4.9%） developed recurrent mild MR, and no patients had more than mild MR. Mean MR grade, leli atrial diameter （LAD）, left ventricular end-diastolic diameter （LVEDD）, and let1 ventricular ejection fraction （LVEF） were significantly decreased when compared with preoperative values. Mean MR grade decreased from 3.96 ± 0.13 to 0.17 ± 0.49 （Z- -8.456, P 〈 0.001 ）, LAD from 43.8 ± 5.9 to 35.5 ± 3.8 mm （I - 15.131, P 〈 0.001 ）, LVEDD fiom 51.0 ± 5.0 to 43.3 ± 2.2 mm （t = 14.481, P 〈 0.001 ）, and LV EF l＇rom 67.3 ± 7.0% to 63.9 ± 5.1% （t = 4.585, P 〈 0.001 ）. Conclusion： Robotic MV repair for MR due to degenerative disease is associated with a low rate of recurrent MR, and a significant improvement in MR grade, LAD, and LVEDD, but a significant decrease in LVEF at echocardiographic follow-up.

关键词： Degenerative Disease Mitral Regurgitation Mitral Valve Repair

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空天飞行技术创新与发展展望

宇航学报 2021年第7期42卷 807-819页

作者：王长青中国航天科工飞航技术研究院北京100074

首先介绍了空天飞行技术的发展历程与现状;结合各国发展经验及空天飞行器飞行特点提出了空天飞行技术面临的基础科学问题,并依据目前的技术发展情况提出了具体解决途径;阐述了空天飞行技术的未来发展方向。太空是人类的未来,“廉价、便... 详细信息

首先介绍了空天飞行技术的发展历程与现状;结合各国发展经验及空天飞行器飞行特点提出了空天飞行技术面临的基础科学问题,并依据目前的技术发展情况提出了具体解决途径;阐述了空天飞行技术的未来发展方向。太空是人类的未来,“廉价、便捷、安全、机动”的空天飞行器将颠覆现有进出空间方式开辟新太空时代。

关键词：空天飞行器航天运输系统可重复使用飞行器航天发射

Robust Sliding-mode Filtering for a Class of Uncertain Nonlinear Discrete-time State-delayed Systems

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自动化学报 2006年第1期32卷 96-100页

作者： WU Li-Gang wang chang-Hong ZENG qing-Shuang GAO Hui-Jun Space Control and Inertial Technology Research Center Harbin Institute of Technology Harbin 150001

This paper is concerned with the problem of robust sliding-mode filtering for a class of uncertain nonlinear discrete-time systems with time-delays. The nonlinearities are assumed to satisfy global Lipschitz conditions and parameter uncertainties are supposed to reside in a polytope. The resulting filter is of the Luenberger type with the discontinuous form. A sufficient condition with delay-dependency is proposed for existence of such a filter. And the desired filter can be found by solving a set of matrix inequalities. The resulting filter adapts for the systems whose noise input is real functional bounded and not be required to be energy bounded. A numerical example is given to illustrate the effectiveness of the proposed design method.

关键词：鲁棒控制滑动模式滤波器离散系统状态延迟线性矩阵不等式

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子图相似性的恶意程序检测方法

软件学报 2020年第11期31卷 3436-3447页

作者：汪洁王长青中南大学计算机学院湖南长沙410083

动态行为分析是一种常见的恶意程序分析方法,常用图来表示恶意程序系统调用或资源依赖等,通过图挖掘算法找出已知恶意程序样本中公共的恶意特征子图,并通过这些特征子图对恶意程序进行检测.然而这些方法往往依赖于图匹配算法,且图匹配... 详细信息

动态行为分析是一种常见的恶意程序分析方法,常用图来表示恶意程序系统调用或资源依赖等,通过图挖掘算法找出已知恶意程序样本中公共的恶意特征子图,并通过这些特征子图对恶意程序进行检测.然而这些方法往往依赖于图匹配算法,且图匹配不可避免计算慢,同时,算法中还忽视了子图之间的关系,而考虑子图间的关系有助于提高模型检测效果.为了解决这两个问题,提出了一种基于子图相似性恶意程序检测方法,即DMBSS.该方法使用数据流图来表示恶意程序运行时的系统行为或事件,再从数据流图中提取出恶意行为特征子图,并使用"逆拓扑标识"算法将特征子图表示成字符串,字符串蕴含了子图的结构信息,使用字符串替代图的匹配.然后,通过神经网络来计算子图间的相似性即将子图结构表示成高维向量,使得相似子图在向量空间的距离也较近.最后,使用子图向量构建恶意程序的相似性函数,并在此基础上,结合SVM分类器对恶意程序进行检测.实验结果显示,与其他方法相比,DMBSS在检测恶意程序时速度较快,且准确率较高.

关键词：恶意程序检测神经网络子图分布式表示图相似函数

Diode-Laser-Array Single-End-Pumped 5W Nd:YVO_(4)/KTP Continuous-Wave Solid-State Green Laser

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Chinese Physics Letters 1999年第7期16卷 508-509页

作者： LIU Jun-hai wang chang-qing LU Jun-hua LI Guang-ming SHAO Zong-shu wang Ji-yang LIU Yao-gang JIANG Min-hua National Laboratory of Crystal Materials Shandong UniversityJiJnan 250100

Continuous-wave radiation of 5W at 532 nm was produced with an Nd:YVO_(4)/KTP intracavity&equency-doubled laser end-pumped by a diode-laser-array at pump power of 17.2 W,giving optical conversion efRciency of 29.1%.The output power stability was measured to be better than 1.5%in short term *** pump-induced thermal lensing was also measured,showing good agreement with the performance of the laser.

关键词： Nd: pump pumped

Effects of surface modification by Ni, Ti and B on electrochemical properties of Mg_(1.8)Cu_(0.2)Ni hydrogen storage alloy

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Journal of Chongqing University 2012年第4期11卷 177-182页

作者：焦晓燕 wang chang-qing ZHAO Na ZHU Gui-qin College of Science Hebei North University

Amorphous alloy Mg1.8Cu0.2Ni was successfully prepared by mechanical alloying （MA） and a series of （n-x）Ni- x（Ti＋B） composites were synthesized by MA. The electrochemical properties of Mgl.8Cu0.2Ni coated by Ni, Ti and B were studied by cyclic charge-discharge, linear polarization curve, and hydrogen diffusion coefficient experiments. Experimental results indicate that Mg1.8Cu0.2Ni-[0.9Ni0.6（Ti＋B）] composite which was MA 30 h exhibited the best performance and its initial discharge capacity arrived to 714.1 mAh/g. After 30 cycles the discharge capacity was above 530 mAh/g, which was much higher than that of Mg1.8Cu0.2Ni. And after 100 cycles it holded still 442.1 mAh/g. On all accounts, after modification by Ni, Ti and B, the initial discharge capacity and high-rate discharge ability of the electrode were evidently increased. At the same time, the cycle performance was also improved significantly.

关键词： hydrogen storage alloy mechanical alloying method surface modification MgNi-NiTiB

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马铃薯颗粒全粉的微波干燥工艺的研究

食品科学 2005年第7期26卷 133-136页

作者：王常青山西大学生命科与技术学院山西太原030006

本实验研究了微波干燥条件对马铃薯颗粒全粉水分含量、白度、VC含量的影响。结果发现,微波干燥温度与产品水分、VC含量均呈二元函数关系。微波干燥能耗与产品水含量的函数关系式为Y=—————————。尽管干燥温度越高,产品中VC破坏... 详细信息

本实验研究了微波干燥条件对马铃薯颗粒全粉水分含量、白度、VC含量的影响。结果发现,微波干燥温度与产品水分、VC含量均呈二元函数关系。微波干燥能耗与产品水含量的函数关系式为Y=—————————。尽管干燥温度越高,产品中VC破坏率越高,白度越低,但是,微波干燥的产品品质明显优于热风干燥,全粉的VC含量和白度高于热风干燥,SO2残留量含量低于热风干燥。

关键词：马铃薯颗粒全粉微波干燥工艺