检索结果-南通市图书馆

Thermodynamic modelling of unloaded and loaded N,N-diethylethanolamine solutions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green Energy & Environment 2016年第3期1卷 246-257页

作者： Monica Garcia Hanna K.Knuutila sai gu Department of Chemical and Process Engineering Faculty of Engineering and Physical SciencesUniversity of Surrey Department of Chemical Engineering Norwegian University of Science and Technology (NTNU)

Chemical absorption is a crucial step for several chemical processes such as ammonia production, coal gasification, methane reforming,ethylene oxide manufacturing and treatment of associated gas streams [1]. It is considered one of the main processes to eliminate CO_2 emissions from power plants by *** of new solvents are of high interest in chemical absorption for carbon capture. For the design of the absorption and desorption columns it is essential to know the vapour-liquid equilibrium(VLE), heat of absorption and densities. N,N-diethylethanolamine(DEEA) appeared as one of the amines with the lowest amount of energy needed for its regeneration [2], which would directly decrease the operation costs. DEEA has a high CO_2 loading of 1 mol/mol of amine compared to the traditional MEA solvent(0.5 mol/mol amine) and is obtained from renewable sources[1]. The main weakness is its low absorption rate and consequently the use of promoters is *** this work, a thermodynamic model based on the electrolyte non-random two-liquid theory(eNRTL) was created and fitted to correlate and predict the partial and total pressures of the unloaded and loaded aqueous DEEA solutions. New interaction parameters were obtained for the binary and tertiary system. This model represents the vapour pressures of the pure components, DEEA and H_2 O, with AARD of 1.9% and 1.73%respectively. Furthermore, the fitted model predicts the total pressure above the binary system, H_2O-DEEA, with AARD of 0.05%. The excess of enthalpy and densities are predicted with AARD of 5.63% and 1.38% respectively. The tertiary system, H_2O-DEEA-CO_2, is fitted for 2 M and5 M DEEA solutions with loading between 0.042 and 0.9 mol CO_2/mol amine up to 80 ℃. Results of CO_2 partial pressures and total pressures are reproduced, with AARD of 19.45% and 16.18% respectively. Densities are predicted with an AARD of 1.52%.

关键词： DEEA CO2 capture Chemical absorption Modelling

Investigations on the Droplet Impact onto a Spherical Surface with a High Density Ratio Multi-Relaxation Time Lattice-Boltzmann Model

在线全文

学校读者我要写书评

暂无评论

Communications in Computational Physics 2014年第9期16卷 892-912页

作者： Duo Zhang K.Papadikis sai gu Xi’an Jiaotong-Liverpool University No.111 Ren’ai RoadSuzhou Dushu Lake Higher Education TownSuzhouChina 215123. School of Engineering University of LiverpoolBrownlow HillLiverpoolL697ZXUnited Kingdom School of Engineering Cranfield UniversityBedfordshire MK430ALUnited Kingdom.

In the current study,a two-dimensional multi-relaxation time(MRT)lattice Boltzmann model which can tolerate high density ratios and low viscosity is employed to simulate the liquid droplet impact onto a curved *** temporal variation of the film thickness at the north pole of the target surface is *** different temporal phases of the dynamics behavior,namely,the initial drop deformation phase,the inertia dominated phase and the viscosity dominated phase are reproduced and *** effect of the Reynolds number,Weber number and Galilei number on the film flow dynamics is *** addition,the dynamic behavior of the droplet impact onto the side of the curved target is shown,and the effect of the contact angle,the Reynolds number and the Weber number are investigated.

关键词： Multiphase flow MRT Lattice Boltzmann high-density-ratio droplet impact film thickness dynamic behavior.

Perception-Driven Learning of High-Dynamic Jumping Motions for Single-Legged Robots

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2024年第4期21卷 1733-1746页

作者： Nengxiang Sun Fei Meng sai gu Botao Liu Xuechao Chen Zhangguo Yu Qiang Huang School of Mechatronical Engineering Beijing Institute of TechnologyBeijing100081China Key Laboratory of Biomimetic Robots and Systems Ministry of EducationBeijing100081China

Legged robots show great potential for high-dynamic motions in continuous interaction with the physical environment,yet achieving animal-like agility remains significant *** animals usually predict and plan their next locomotion by combining high-dimensional information from proprioception and exteroception,and adjust the stiffness of the body’s skeletal muscle system to adapt to the current *** control methods have limitations in handling high-dimensional state information or complex robot motion that are difficult to plan manually,and Deep Reinforcement Learning(DRL)algorithms provide new solutions to robot motioncontrol *** by biomimetics theory,we propose a perception-driven high-dynamic jump adaptive learning algorithm by combining DRL algorithms with Virtual Model Control(VMC)*** robot will be fully trained in simulation to explore its motion potential by learning the factors related to continuous jumping while knowing its real-time jumping *** policy trained in simulation is successfully deployed on the bio-inspired single-legged robot testing platform without further *** results show that the robot can achieve continuous and ideal vertical jumping motion through simple training.

关键词： Deep reinforcement learning High-dynamic jump Perception driven Single-legged robot

Design and Dynamic Locomotion Control of Quadruped Robot with Perception-Less Terrain Adaptation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cyborg and Bionic Systems 2022年第1期2022卷 177-186页

作者： Lei Wang Libo Meng Ru Kang Botao Liu sai gu Zhihao Zhang Fei Meng Aiguo Ming Intelligent Robotics Institute School of Mechatronical Engineering Beijing Institute of TechnologyBejing 100081China Beijing Advanced Imnovation Center for Intelligent Robots and Systems Beijing Institute of TechnologyBeijing 100081China Department of Mechanical Engineering and Itelligent Systerms The University of Electro-CommunicationsTokyo 182-8585Japan

In this paper,a parallel quadrupedal robot was designed that is capable of versatile dynamic locomotion and perception-less terrain ***,a quadrupedal robot with a symmetric legs and a powerful actuator was implemented for highly dynamic ***,a fast and reliable method based on generalized least square was proposed for estimating the terrain parameters by fusing the body,leg,and contact *** the basis of virtual model control(VMC)with the quadratic program(QP)method,the optimal foot force for terrain adaptation was ***,the results obtained by simulation and indoor and outdoor experiments demonstrate that the robot can achieve a robust and versa tile dynamic locomotion on uneven terrain,and the rejection of disturbances is reliable,which proves the effectiveness and robustness of this proposed method.

关键词： robot Robot terrain

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中药有效成分抗肝纤维化研究进展

中华肝脏病杂志 2005年第6期13卷 479-480页

作者：古赛王丕龙重庆医科大学附属第一医院消化内科 400016

肝纤维化是多数慢性肝病共有的病理特征,是发展到肝硬化的必经阶段,由于肝纤维化有逆转的可能,故对其治疗的研究成为热点.西医治疗肝纤维化由于其自身难以克服的不良反应而难广泛应用于临床.中医药治疗肝纤维化历史悠久,近几年来,学者... 详细信息

肝纤维化是多数慢性肝病共有的病理特征,是发展到肝硬化的必经阶段,由于肝纤维化有逆转的可能,故对其治疗的研究成为热点.西医治疗肝纤维化由于其自身难以克服的不良反应而难广泛应用于临床.中医药治疗肝纤维化历史悠久,近几年来,学者们对众多中药提取物的有效成分进行了广泛而深入的抗肝纤维化研究,效果较为满意.

关键词：抗肝纤维化中药有效成分中医药治疗中药提取物病理特征慢性肝病不良反应西医治疗肝硬化

在线全文

学校读者我要写书评

暂无评论

强肝胶囊治疗非酒精性脂肪性肝纤维化的疗效

中华肝脏病杂志 2011年第10期19卷 791-792页

作者：古赛黄秒兴重庆医科大学附属第一医院消化科 400016

非酒精性脂肪性肝病（NAFLD）是遗传-环境-代谢应激相关性肝病，肝纤维化是NAFLD发展中的关键阶段，是向肝硬化发展的重要病理过程。肝纤维化发病机制尚未完全明了，目前也缺乏有效安全的抗肝纤维化的治疗方案。本研究应用强肝胶囊治疗... 详细信息

非酒精性脂肪性肝病（NAFLD）是遗传-环境-代谢应激相关性肝病，肝纤维化是NAFLD发展中的关键阶段，是向肝硬化发展的重要病理过程。肝纤维化发病机制尚未完全明了，目前也缺乏有效安全的抗肝纤维化的治疗方案。本研究应用强肝胶囊治疗非酒精性脂肪性肝纤维化患者半年，观察其在抗肝纤维化方面的疗效，并探讨其机制。

关键词：脂肪肝肝硬化治疗结果强肝胶囊

在线全文

学校读者我要写书评

暂无评论

难治性反流性食管炎相关危险因素分析

重庆医科大学学报 2014年第12期39卷 1813-1816页

作者：聂颖古赛重庆医科大学附属第一医院消化内科重庆400016

目的:探讨难治性反流性食管炎(refractory reflux esophagitis,RRE)的相关危险因素。方法:反流性食管炎(reflux esophagitis,RE)门诊患者共212例,给予质子泵抑制剂(proton pump inhibitors,PPIs)治疗8周,临床症状无有效缓解的RRE患者93例(占总数的43.9%),临床症状能有效缓解的非难治性反流性食管炎(non-refractory reflux esophagitis,NRRE)患者119例(占总数的56.1%),对比分析RRE与NRRE患者的性别、年龄、体质指数(body mass index,BMI)、家族史、胃镜下分级、焦虑抑郁状况。结果:RRE组与NRRE组在年龄、BMI、病程、家族史方面存在统计学差异(P0.05),治疗前后RRE与NRRE患者在焦虑抑郁积分方面有统计学差异(P0.05)。logistic回归分析显示中老年、肥胖、存在RE家族史、长病程、临床症状及焦虑抑郁重是RRE的危险因素。结论:RRE与年龄、BMI、家族史、焦虑抑郁状态、病程等多种因素相关,中老年、肥胖者、有RE家族史者、病程长者、临床症状及焦虑抑郁状况严重者更易患RRE,RRE患者的临床严重程度与胃镜下的严重程度无平行关系。

关键词：反流性食管炎难治性反流性食管炎非难治性反流性食管炎相关因素

在线全文

学校读者我要写书评

暂无评论

枸杞多糖预防大鼠酒精性脂肪肝的实验研究

中华肝脏病杂志 2007年第3期15卷 204-208页

作者：古赛王丕龙姜蓉重庆医科大学附属第一医院消化内科 400016 重庆医科大学组胚教研室

目的研究枸杞多糖（LBP）预防大鼠酒精性脂肪肝（AFL）的效果，探讨其作用机制。方法125只Wister大鼠随机分为4组，正常对照组：用蒸馏水灌胃；5％LBP预防组和10％LBP预防组：LBP与乙醇同时灌胃，酒精组：单纯乙醇灌胃。比较4组大鼠：... 详细信息

目的研究枸杞多糖（LBP）预防大鼠酒精性脂肪肝（AFL）的效果，探讨其作用机制。方法125只Wister大鼠随机分为4组，正常对照组：用蒸馏水灌胃；5％LBP预防组和10％LBP预防组：LBP与乙醇同时灌胃，酒精组：单纯乙醇灌胃。比较4组大鼠：肝脏病理形态，血清ALT、AST、GGT，肝匀浆脂质过氧化酶[谷胱甘肽过氧化物酶（GSHPX）、超氧化物歧化酶（SOD）、还原型谷胱甘肽（GSH）、丙二醛（MDA）]以及过氧化氢（H2O2），肝细胞色素P4502E1（CYP2E1）基因及蛋白表达。结暴10周时测定AST，5％和10％LBP预防组分别为（132．3±25．7）U／L和（127．5±29．1）U／L，GGT分别为（1．9±0．5）U／L和（1．8±0．7）U／L，酒精组AST为（245．7±32．1）U／L、GGT为（4．4±0．6）U／L，预防组与酒精组比较，差异有统计学意义，P〈0．01，ALT预防组与酒精组比较，差异无统计学意义。10周时测定GSH-PX活性，5％和10％LBP预防组分别为（13．5±1．4）U·mg^-1·min^-1和（13．6±1．5）U·mg^-1·min^-***活性分别为（206．7±13．2）U／L和（203．2±18．8）U／L，酒精组GSH-PX活性为（7．2±1．6）U·mg^-1·min^-1和SOD活性为（116．5±13．6）U／L，预防组与酒精组比较，明显提高，差异有统计学意义，P〈0．01。GSH含量，两预防组分别为（65．1±11．0）mg／g和（66．6±11．1）mg／g，酒精组为（30．5±10．7）mg／g，预防组与酒精组比较，明显增加，差异有统计学意义，P〈0．01。MDA含量，两预防组分别为（5．1±0．3）nmol／mg和（5．1±0．4）nmol／mg，酒精组为（14．5±3．2）nmol／mg。H202两预防组分别为（135．4±23．5）mmol／g和（132．6±31．8）mmol／g，酒精组为（328．5±45．6）mmol／g，两预防组比酒精组明显减少，差异有统计学意义，P〈0．叭。CYP2E1基因表达，，5周和10周两预防组分别为O．39±0．04，0．40±0．06和0．41±0．05，0．42±0．08，酒精组分别为0．74±0．05和1．02±0．08。蛋白表达水平两预防组分别为3．49±0．36，3．29±0．30和3．58±0．30，3．36±0．37，酒精组分别为5．63±0．44和7．90±0．26，两预防组比酒精组显著降低，差异有统计学意义，P〈0．01。两预防组大鼠肝脏脂肪性病理变化明显轻于酒精组。结论LBP通过抑制CYP2E1基因及蛋白表达，减轻脂质过氧化反应，有效的预防AFL。

关键词：脂肪肝酒精性预防和控制脂质过氧化作用细胞色素P450 枸杞多糖

脂联素、抵抗素和Apelin在脂肪变肝细胞中的表达及意义

在线全文

学校读者我要写书评

暂无评论

重庆医科大学学报 2015年第3期40卷 366-370页

作者：霍晴古赛重庆医科大学附属第一医院消化内科重庆400016

目的:研究脂肪细胞因子脂联素、抵抗素和Apelin在油酸诱导的肝细胞脂肪变性过程中的作用及意义。方法:以常规培养的人正常肝细胞株L02做为对照组,采用油酸诱导L02细胞脂肪变性,建立非酒精性脂肪变性肝细胞模型,设置油酸诱导24、48、72 ... 详细信息

目的:研究脂肪细胞因子脂联素、抵抗素和Apelin在油酸诱导的肝细胞脂肪变性过程中的作用及意义。方法:以常规培养的人正常肝细胞株L02做为对照组,采用油酸诱导L02细胞脂肪变性,建立非酒精性脂肪变性肝细胞模型,设置油酸诱导24、48、72 h各时相点为实验组。用油红O染色镜下观察对照组和实验各组肝细胞形态学变化,用试剂盒检测肝细胞内甘油三酯(triglyceride,TG)水平,并用实时荧光定量PCR与Western blot检测脂联素、抵抗素和Apelin m RNA和蛋白的表达。结果:24 h肝细胞出现脂肪变性,72 h脂肪变性最严重;各实验组肝细胞内TG含量较对照组均升高,差异有统计学意义(LSD-t值和P值分别为8.477、0.000;17.622、0.000;39.251、0.000),72 h增高最明显;实验组脂联素m RNA和蛋白的表达量均降低,都于24 h开始降低,72 h表达最低,与对照组相比差异有统计学意义(LSD-t值和P值分别为8.240、0.000,16.940、0.000,18.292、0.000;13.283、0.000,21.586、0.000,27.030、0.000);实验组抵抗素m RNA的表达上调,于24 h开始增强,72 h表达最强,与对照组相比差异有统计学意义(LSD-t值和P值分别为2.480、0.038;12.003、0.000;24.080、0.000),而其蛋白质的表达上调,于48 h开始增强,72 h表达最高,与对照组比较差异有统计学意义(LSD-t值和P值分别为8.854、0.000;13.301、0.000);实验组Apelin m RNA和蛋白的表达均上调,都于24 h开始增强,72 h表达最高,与对照组相比差异有统计学意义(LSD-t值和P值分别为2.503、0.000,9.720、0.000,13.720、0.000;5.629、0.000,8.251、0.000,15.953、0.000)。结论:油酸诱导的肝细胞脂肪变性模型中脂肪细胞因子脂联素表达下调、抵抗素和Apelin表达上调,提示脂肪细胞因子脂联素、抵抗素和Apelin的表达的调控共同参与了肝细胞非酒精性脂肪变性。

关键词：非酒精性脂肪肝脂联素抵抗素 Apelin