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艾司氯胺酮对腹腔镜结直肠癌根治术老年患者术后疼痛及神经认知紊乱的影响

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四川医学 2023年第7期44卷 697-701页

作者：雷宇王茜宋世雄李明张博林王能勇广元市中心医院麻醉科检验科四川广元628000

目的探讨艾司氯胺酮对腹腔镜结直肠癌根治术老年患者术后疼痛及神经认知紊乱的(PND)影响。方法选择拟行腹腔镜结直肠癌根治术的老年患者120例,按照随机数字表法将患者分为E_(1)组、E_(2)组及C组,每组40例。3组麻醉方法相同。麻醉诱导后... 详细信息

目的探讨艾司氯胺酮对腹腔镜结直肠癌根治术老年患者术后疼痛及神经认知紊乱的(PND)影响。方法选择拟行腹腔镜结直肠癌根治术的老年患者120例,按照随机数字表法将患者分为E_(1)组、E_(2)组及C组,每组40例。3组麻醉方法相同。麻醉诱导后E_(2)组静脉注射艾司氯胺酮0.25 mg/kg, E_(1)组与C组静脉注射等量生理盐水。术后行静脉自控镇痛,镇痛液配方:3组舒芬太尼2.5μg/kg、格拉司琼6 mg加入生理盐水稀释至150 ml, E_(1)组、E_(2)组另加艾司氯胺酮0.75 mg/kg。背景剂量3 ml/h,单次剂量2 ml,锁定时间30 min。记录3组术前(T_(0))、术后2 h(T_(1))、12 h(T_(2))、24 h(T_(3))、72 h(T_(4))、 7 d(T_(5))视觉模拟评分(VAS评分)。记录3组在T_(1)、T_(2)、T_(5)时神经认知紊乱发生例数及术后不良反应的发生情况。于T_(0)、T_(1)、T_(5)时分别抽取静脉血2 ml,采用酶联免疫吸附法(ELISA)测定血清中的IL-6和TNF-α水平。结果 3组VAS评分在时间、组间以及时间与组间交互作用比较差异有统计学意义(P0.05),3组术后均未发现呼吸抑制病例。3组IL-6及TNF-α水平在时间、组间以及时间与组间交互作用比较差异有统计学意义(P<0.05)。组内与T_(0)比较,3组在T_(1)、T_(5)时IL-6及TNF-α水平升高(P<0.01)。与T_(1)比较,3组在T_(5)时IL-6及TNF-α水平下降(P<0.01)。组间与C组和E_(1)组比较,E_(2)组在T_(1)、T_(5)时IL-6及TNF-α水平下降(P<0.01)。结论艾司氯胺酮可减轻腹腔镜结直肠癌根治术老年患者术后疼痛及神经认知紊乱的发生。

关键词：氯胺酮镇痛神经认知障碍老年人

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小半径曲线盾构隧道管片错台控制技术研究

河南科技 2019年第2期38卷 86-88页

作者：吴发展尹粤宋仕雄陈亚宪中国中铁隧道集团二处有限公司河北三河065201

小半径曲线盾构隧道工程,管片向外侧扭曲挤压地层,使地层和管片结构均受到复杂的影响。可见,管片安装好坏直接影响隧道的质量和使用寿命。由此,本文依托小半径曲线盾构电缆隧道调查管片拼装错台超标统计情况,对超标原因进行分析,并针对... 详细信息

小半径曲线盾构隧道工程,管片向外侧扭曲挤压地层,使地层和管片结构均受到复杂的影响。可见,管片安装好坏直接影响隧道的质量和使用寿命。由此,本文依托小半径曲线盾构电缆隧道调查管片拼装错台超标统计情况,对超标原因进行分析,并针对性地提出具体的控制措施,提高管片拼装质量。

关键词：小半径曲线盾构管片错台

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非一致性条件下松澧地区洪水遭遇规律分析

水利水电科技进展 2024年第4期44卷 14-22页

作者：隆院男黄春福莫军成黄草宋昕熠闫世雄曹劲松长沙理工大学水利与环境工程学院湖南长沙410114 洞庭湖水环境治理与生态修复湖南省重点实验室湖南长沙410114 湖南省水利水电勘测设计规划研究总院有限公司湖南长沙410007

为研究澧水与松滋河洪水遭遇规律,根据澧水石门站和松滋河新江口站、沙道观站1959—2020年实测日均流量资料,采用非一致性GAMLSS模型优选了年最大洪峰和连续7 d年最大洪量的边缘分布,构建了基于Copula函数的二维联合分布模型,进而得出... 详细信息

为研究澧水与松滋河洪水遭遇规律,根据澧水石门站和松滋河新江口站、沙道观站1959—2020年实测日均流量资料,采用非一致性GAMLSS模型优选了年最大洪峰和连续7 d年最大洪量的边缘分布,构建了基于Copula函数的二维联合分布模型,进而得出不同量级组合下的洪水遭遇概率。结果表明:松澧地区的洪水序列发生了显著变异,基于时变对数正态、伽马、威布尔分布以及Copula联合分布能够较好地反映区域实际洪水特征;松澧地区典型年洪水遭遇以松滋河洪水过程遭遇澧水洪水为主;澧水与松滋河的年最大洪峰或连续7 d年最大洪量的同现概率随着洪水量级的增大而减小,且澧水与松滋河东支的洪水遭遇概率更高;当澧水发生千年一遇大洪水时,与松滋河中小洪水的遭遇概率更高。

关键词：澧水松滋河 Copula函数洪水遭遇联合分布

维普期刊数据库博看期刊

Engagement Angle Modeling for Multiple-circle Continuous Machining and Its Application in the Pocket Machining

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Chinese Journal of Mechanical Engineering 2017年第2期30卷 256-271页

作者： shixiong WU Wei MA Haiping BAI Chengyong WANG Yuexian song Mechanical and Electrical Engineering Institute GuangdongUniversity of TechnologyGuangzhou 510006China

The progressive cutting based on auxiliary paths is an effective machining method for the material accumulating region inside the mould pocket. But the method is commonly based on the radial depth of cut as the control parameter, further more there is no more appropriate adjustment and control approach. The end-users often fall to set the parameter correctly, which leads to excessive tool load in the process of actual machining. In order to make more reasonable control of the machining load and toolpath, an engagement angle modeling method for multiplecircle continuous machining is presented. The distribution mode of multiple circles, dynamic changing process of engagement angle, extreme and average value of engage- ment angle are carefully considered. Based on the engagement angle model, numerous application techniques for mould pocket machining are presented, involving the calculation of the milling force in multiple-circle continuous machining, and rough and finish machining path planning and load control for the material accumulating region inside the pocket, and other aspects. Simulation and actual machining experiments show that the engagement angle modeling method for multiple-circle continuous machining is correct and reliable, and the related numerous application techniques for pocket machining are feasible and effective. The proposed research contributes to the analysis and control tool load effectively and tool-path planning reasonably for the material accumulating region inside the mould pocket.

关键词： Pocket · Engagement angle · Milling force Circle · High·speed machining

Improved accuracy of superpixel segmentation by region merging method

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Frontiers of Optoelectronics 2016年第4期9卷 633-639页

作者： song ZHU Danhua CAO Yubin WU shixiong JIANG School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan 430074 China

Superpixel as an important pre-processing technique has been successfully used in many vision applications. In this paper, we proposed a region merging method to improve superpixel segmentation accuracy with low computational cost. We first segmented the image into many accurate small regions, and then progressively agglomerated them until the desired region number was reached. The region merging weight was derived from a novel energy function, which encourages the superpixel with color consistency and similar size. Experimental results on the Berkeley BSDS500 data set showed that our region merging method can significantly improve the accuracy of superpixel segmentation. Moreover, the region merging method only need 50ms to process a 481x321 image on a single Intel i3 CPU at 2.5 GHz.

关键词： image processing image segmentation super-pixels region merging

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利用冶金焦粉和硅石粉生产硅铁合金的研究

安徽冶金 2012年第4期 13-16,32页

作者：鲁慧慧张朝晖刘佰龙宋世雄西安建筑科技大学

研究利用酒钢自产的冶金焦粉和硅石粉生产硅铁合金具有重要的实用价值,采用常规法(硅石块+兰炭+钢屑)和压块法(焦粉和硅石粉混合造块+钢屑)进行制备硅铁的对比试验,研究了冶金焦粉和硅石粉应用于硅铁生产的可行性,并对两种方法的工艺特... 详细信息

研究利用酒钢自产的冶金焦粉和硅石粉生产硅铁合金具有重要的实用价值,采用常规法(硅石块+兰炭+钢屑)和压块法(焦粉和硅石粉混合造块+钢屑)进行制备硅铁的对比试验,研究了冶金焦粉和硅石粉应用于硅铁生产的可行性,并对两种方法的工艺特点、原料消耗、电耗等进行了对比分析,结果表明:利用冶金焦粉与硅石粉作压块原料,可生产理想的硅铁合金,且压块法的硅石消耗量、[Si]回收率、顶电极消耗和电耗均优于常规法,但要在生产过程中需控制好焦粉的烧损。

关键词：焦粉硅石粉硅铁合金压块

cgRNASP-CN: a minimal coarse-grained representation-based statistical potential for RNA 3D structure evaluation

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Communications in Theoretical Physics 2022年第7期74卷 129-137页

作者： Ling song shixiong Yu Xunxun Wang Ya-Lan Tan Zhi-Jie Tan Department of Physics and Key Laboratory of Artificial Micro&Nano-structures of Education School of Physics and TechnologyWuhan UniversityWuhan 430072China Research Center of Nonlinear Science School of Mathematical and Physical SciencesWuhan Textile UniversityWuhan 430073China

Knowledge of RNA 3-dimensional(3 D) structures is critical to understand the important biological functions of RNAs, and various models have been developed to predict RNA 3 D structures in silico. However, there is still lack of a reliable and efficient statistical potential for RNA 3 D structure evaluation. For this purpose, we developed a statistical potential based on a minimal coarse-grained representation and residue separation, where every nucleotide is represented by C4’ atom for backbone and N1(or N9) atom for base. In analogy to the newly developed all-atom rsRNASP, cgRNASP-CN is composed of short-ranged and long-ranged potentials, and the short-ranged one was involved more subtly. The examination indicates that the performance of cgRNASP-CN is close to that of the all-atom rsRNASP and is superior to other top all-atom traditional statistical potentials and scoring functions trained from neural networks, for two realistic test datasets including the RNA-Puzzles dataset. Very importantly,cgRNASP-CN is about 100 times more efficient than existing all-atom statistical potentials/scoring functions including rsRNASP. cgRNASP-CN is available at website: https://***/Tan-group/cgRNASP-CN.

关键词： RNA structure prediction statistical potential structure evaluation

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非开挖修复技术在截污管道修复中的应用

城市道桥与防洪 2024年第6期 212-214,218页

作者：赵士雄杨元元宋清泉北京市市政专业设计院股份公司北京市100037 鄂尔多斯市环保投资有限公司内蒙古鄂尔多斯017000 中设建联工程设计有限公司广东珠海519000

截污治污工程作为水质改善的重要组成部分,对水环境治理具有基础性作用。很多城市的截污管道由于建成年代早、使用年限长,已出现不同程度的缺陷,污水外渗严重影响周边河流与地下水环境。非开挖修复技术凭借施工占地少、工期短、环境效... 详细信息

截污治污工程作为水质改善的重要组成部分,对水环境治理具有基础性作用。很多城市的截污管道由于建成年代早、使用年限长,已出现不同程度的缺陷,污水外渗严重影响周边河流与地下水环境。非开挖修复技术凭借施工占地少、工期短、环境效益好等优势,在截污管道修复中得到广泛应用。结合广东省惠州市某截污管道修复工程,对非开挖修复技术的选择与应用进行探讨,为同类工程提供参考。

关键词：截污管道非开挖修复原位固化

Lens distortion correction based on one chessboard pattern image

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Frontiers of Optoelectronics 2015年第3期8卷 319-328页

作者： Yubin WU shixiong JIANG Zhenkun XU song ZHU Danhua CAO School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan 430074 China

This paper proposes a detection method of chessboard comer to correct camera distortions -including radial distortion, decentering distortion and prism distor- tion. This proposed method could achieve high comer detection rate. Then we used iterative procedure to optimize distortion parameter to minimize distortion residual. In this method, first, non-distortion points are evaluated by four points near image center; secondly, Levenberg-Marquardt nonlinear optimization algorithm was adopted to calculate distortion parameters, and then to correct image by these parameters; thirdly, we calculated comer points on the corrected image, and repeated previous two steps until distortion parameters converge. Results showed the proposed method by iterative procedure can make the impact of slight distortion around image center negligible and the average of distortion residual of one line is almost 0.3 pixels.

关键词： computer vision camera distortion distortion correction comer detection