检索结果-南通市图书馆

维普期刊数据库博看期刊

不同相态下CO_(2)管道输送技术经济评价分析

在线全文

学校读者我要写书评

暂无评论

石油与天然气化工 2024年第5期53卷 93-102页

作者：杨继忠戴万能李茜刘恩斌计维安钟华中国石油西南油气田公司集输工程技术研究所西南石油大学石油与天然气工程学院

目的为助力实现“双碳”目标,明确不同相态下CO_(2)管道输送的适应性和经济性。方法以中国石油西南油气田碳酸盐岩气藏CCUS-EGR关键技术研究为背景,优化建立了气相、液相以及超临界相3种相态的CO_(2)管道输送经济性估算模型,分析了流速... 详细信息

目的为助力实现“双碳”目标,明确不同相态下CO_(2)管道输送的适应性和经济性。方法以中国石油西南油气田碳酸盐岩气藏CCUS-EGR关键技术研究为背景,优化建立了气相、液相以及超临界相3种相态的CO_(2)管道输送经济性估算模型,分析了流速、输送距离以及输送量对相对总成本的影响。结果①最低输送成本气相管道最高,液相管道次之,超临界相管道最低;②气相经济流速为3.0~4.0 m/s,液相经济流速为1.0~1.8 m/s,超临界相经济流速为2.0~2.4 m/s;③在不同输送距离下,相对总成本随着输送距离的增加而增大;④在不同输送量下,相对总成本随着输送量的增加而增大,DN200以上规格的管道输送成本随输送量变化增长较慢,DN100的管道输送成本随输送量变化很大。结论通过建立CO_(2)管道输送经济性估算模型,分析不同相态下的CO_(2)管道输送经济性,为CO_(2)管道输送工程建设提供充分的依据和参考。

关键词： CCUS CO_(2)管道管道工艺计算相态经济性分析

在线全文

学校读者我要写书评

暂无评论

电推进火星捕获能量最优平面轨迹间接法优化

上海航天（中英文） 2024年第5期41卷 113-120页

作者：李海洋段晓闻赵英杰刘彤杰陆希上海卫星工程研究所上海201109 上海市深空探测技术重点实验室上海201109 深空探测实验室安徽合肥230026 上海航天技术研究院上海201109

电推进行星捕获由于推力小,行星捕获时间将显著增长,具有与化学推进行星捕获完全不同的特性,极大地增加了轨道优化的难度。本文围绕小推力行星捕获段控制问题,以火星探测捕获轨迹优化问题为例,基于双曲轨道参数开展不同性能指标下行星... 详细信息

电推进行星捕获由于推力小,行星捕获时间将显著增长,具有与化学推进行星捕获完全不同的特性,极大地增加了轨道优化的难度。本文围绕小推力行星捕获段控制问题,以火星探测捕获轨迹优化问题为例,基于双曲轨道参数开展不同性能指标下行星捕获开关机及控制策略研究,使用间接法求解能量最优平面轨迹优化问题得到最优控制策略,并与沿速度方向反向的控制策略进行了比较。结果表明:所提方法实现了对小推力火星捕获的优化设计,捕获后轨道相较于目标轨道的误差较小,轨道安全性能够保证。

关键词：电推进火星捕获开关机及控制策略能量最优平面轨迹优化间接法

Study of Spudcan Reinstallation Near Existing Footprint in Soft Clay

在线全文

学校读者我要写书评

暂无评论

China Ocean Engineering 2022年第2期36卷 322-331页

作者： LI Sa LI Ting-ting SUN Li-qiang liu xin GOU Le-yu School of Civil Engineering Tianjin UniversityTianjin 300350China State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300350China

Spudcan extraction leaves a footprint and disturbed soil surrounding the footprint,which introduces uncertainty and complexity in the spudcan−footprint interaction during spudcan *** paper reports large deformation from finite element results of spudcan reinstallation near the footprint considering the effect of soil *** stages are proposed based on the failure mechanisms of a spudcan reinstalled in disturbed soil and undisturbed ***,the effects of soil disturbance on the position of the maximum horizontal force and moment are *** could be found that the critical offset distance in the disturbed case is larger than that in the undisturbed *** addition,the maximum horizontal force and moment occur at different depths in the disturbed case and undisturbed case.A critical area is proposed based on the analyses,which could be useful for determining the position of the maximum horizontal force and moment in practical design.

关键词： spudcan footprint reinstallation soil disturbance

在线全文

学校读者我要写书评

暂无评论

地下煤制气制取液化天然气和液氢工艺研究

石油与天然气化工 2024年第1期53卷 61-68页

作者：刘恩斌鲁绪栋季永强彭杰郝天舒李茜西南石油大学石油与天然气工程学院上海液化天然气有限公司中国石油化工股份有限公司华北油气分公司

目的脱除地下煤制气中的酸气,将地下煤制气中的CH_(4)和H_(2)分离出来并液化。方法对常见的分离方法进行对比,确定采用低温精馏法对煤制气进行脱酸气、分离CH_(4)和H_(2)并液化。根据低温精馏法的原理,设计了一种全新的地下煤制气脱酸... 详细信息

目的脱除地下煤制气中的酸气,将地下煤制气中的CH_(4)和H_(2)分离出来并液化。方法对常见的分离方法进行对比,确定采用低温精馏法对煤制气进行脱酸气、分离CH_(4)和H_(2)并液化。根据低温精馏法的原理,设计了一种全新的地下煤制气脱酸气、分离CH_(4)和H_(2)并液化的工艺流程,该工艺主要由两个精馏塔、一个两相分离器和三级氦膨胀制冷系统组成。同时利用HYSYS软件对其进行模拟分析,确定最优参数。结果该工艺可以将地下煤制气中CO_(2)的摩尔分数脱除到0,H_(2)S的摩尔分数脱除到3.65×10-14,满足处理要求。同时可以实现CH_(4)回收率为99.97%,加压液化天然气(PLNG)的摩尔分数为99.97%,H_(2)的回收率为98.30%,液氢(LH_(2))的摩尔分数为99.99%。结论该工艺可以有效利用地下煤制气制取PLNG和LH_(2),且所需能耗较传统工艺能耗降低了11.64%,具有较高的经济效益。

关键词：地下煤制气低温精馏法脱酸气加压液化天然气液氢

The inhibitor effect of RKIP on inflammasome activation and inflammasome-dependent diseases

在线全文

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2021年第4期18卷 992-1004页

作者： qiang Qin Huan liu Jia’nan Shou Yu Jiang Hong Yu xiaojian Wang Department of General Surgery Sir Run Run Shaw HospitalSchool of MedicineZhejiang UniversityHangzhou 310016PR China lnstitute of Immunology School of MedicineZhejiang UniversityHangzhou 310058PR China Department of Clinical Laboratory Medicine Second Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhou 310009PR China

Aberrant inflammasome activation contributes to the pathogenesis of various human diseases,including atherosclerosis,gout,and metabolic *** of the underlying mechanism involved in the negative regulation of the inflammasome is important for developing new therapeutic targets for these ***,we showed that Raf kinase inhibitor protein(RKIP)negatively regulates the activation of the NLRP1,NLRP3,and NLRC4 *** deficiency enhanced caspase-1 activation and IL-1P secretion via NLRP1,NLRP3,and NLRC4 Inflammasome activation In primary *** overexpression of RKIP in THP-1 cells inhibited NLRP1,NLRP3,and NLRC4 inflammasome ***-deficient mice showed increased sensitivity to Aluminduced peritonitis and Salmonella typhimurium-induced inflammation,indicating that RKIP inhibits NLRP3 and NLRC4 inflammasome activation in ***,RKIP directly binds to apoptosis-associated speck-like protein containing a caspase-recruitment domain(ASC)and competes with NLRP1,NLRP3,or NLRC4 to interact with ASC thus interrupting inflammasome assembly and *** depletion of RKIP aggravated inflammasome-related diseases such as monosodium urate(MSU)-induced gouty arthritis and high-fat diet(HFD)-induced metabolic ***,the expression of RKIP was substantially downregulated in patients with gouty arthritis or type 2 diabetes(T2D)compared to healthy ***,our findings suggest that RKIP negatively regulates NLRP1,NLRP3,and NLRC4 inflammasome activation and is a potential therapeutic target for the treatment of inflammasome-related diseases.

关键词： Raf kinase inhibitor protein(RKIP) Inflammasome Gouty arthritis HFD-induced metabolic disorders

Vortical structures and density fluctuations analysis of supersonic forward-facing step controlled by self-sustaining dual synthetic jets

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

Acta Mechanica Sinica 2020年第6期36卷 1215-1227,I0002页

作者： qiang liu Zhen-bing Luo xiong Deng Yan Zhou Lin Wang Pan Cheng College of Aerospace Science and Engineering National University of Defense TechnologyChangsha410073China

Shock wave/boundary layer interaction(SWBLI)is still one of the unresolved bottlenecks that restrict the development of more advanced flight *** forward-facing step(FFS),an extreme case of compression ramp,often occurs severe SWBLIs with a large separation *** this paper,experimental investigations on vortical structures and density fluctuations characteristics of supersonic FFS controlled by self-sustaining dual synthetic jets(SDSJ)are carried out in a Mach number 2.95 wind *** spatial–temporal resolution flowfield images of FFS without/with active flow control are captured by adopting nano-particle-based planar laser scattering *** control effects of the distance between the actuator and the step are mainly *** paper finds that the SDSJ can effectively change the feature of flowfield,eliminate the separation shock and the reattachment shock,compel the original shock induced by the step leading edge to distort and reduce its intensity *** fluctuations analysis demonstrates that the whole flows seem to move upstream with the increase of distance(dS-J).Discrete Fourier transformation spectrums results reveal that the fluctuations are mainly located in the low-frequency region at ***-frequency components and frequency bandwidth increase slightly after the SDSJ are applied.

关键词： Forward-facing step Self-sustaining dual synthetic jets Flow control Fine structures Density fluctuations

Effects of Interface on the Dynamic Hysteresis Loss and Static Mechanical Properties of Illite Filled SBR Composites

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

Chinese Journal of Polymer Science 2022年第11期40卷 1493-1502页

作者： Zhe-Peng Wang Hao Zhang qiang liu Shao-Juan Wang Shou-Ke Yan Key Laboratory of Rubber-Plastics Ministry of EducationQingdao University of Science&TechnologyQingdao266042China State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing100029China

Despite growing interest in nano-sized fillers,micro-sized fillers with desired compatibility are still used for reinforcing rubbers,owing to their lower production cost and easier processing relative to nano-sized ***,the abundant and eco-friendly clay minerals are recognized as the materials of the twenty-first ***,illite,a naturally occurring clay having dimension in micrometric scale,has been selected as filler to reinforce the *** improve the compatibility of illite with SBR,the illite was modified by either bis[3-(triethoxysilyl)propyl]tetrasulfide(Si69-illite)or 3-mercaptopropyltriethoxysilane(KH580-illite).The interfacial interactions of SBR composites filled with pristine illite(illite/SBR)and Si69-illite(Si69-illite/SBR),or KH580-illite(KH580-illite/SBR)were characterized by bound rubber content and Payne effect measurements,while dynamic hysteresis losses of these uncured and cured composites were also analyzed under various strain *** was found that the filler-rubber interactions were greatly improved for Si69-illite/SBR and KH580-illite/SBR systems compared to the illite/SBR *** leads to an increment of modulus at 300%strain of the composites from 3.46 MPa for illite/SBR to 7.70 MPa for Si69-illite/SBR and12.96 MPa for KH580-illite/***,lower rolling resistance and better wear resistance without compromising wet traction of Si69-illite/SBR and KH580-illite/SBR have been *** demonstrates the high possibility of Si69 and KH580 modified illites as promising alternative fillers for reinforcing rubbers.

关键词： Illite SBR Composite Dynamic hysteresis loss Static mechanical properties

EuBa_(2)Cu_(3)O_(7-δ)超导带材中掺杂相对He^(+)离子辐照缺陷演化及超导电性的影响

在线全文

学校读者我要写书评

暂无评论

物理学报 2024年第8期73卷 305-316页

作者：赵珀王建强陈梅清杨金学苏钲雄卢晨阳刘华军洪智勇高瑞西安交通大学核科学与技术学院西安710049 中国科学院等离子体物理研究所合肥230031 合肥国际应用超导中心合肥230071 上海超导科技股份有限公司上海201203

为探究稀土钡铜氧化物(REBCO)第二代高温超导带材中掺杂相对离子辐照缺陷演化及超导电性的影响机理,本文采用能量为1.4 MeV的He^(+)离子对国产化未掺杂和掺杂摩尔分数3.5%BaHfO_(3)(BHO)的EuBa_(2)Cu_(3)O_(7-δ)带材进行三种不同剂量... 详细信息

为探究稀土钡铜氧化物(REBCO)第二代高温超导带材中掺杂相对离子辐照缺陷演化及超导电性的影响机理,本文采用能量为1.4 MeV的He^(+)离子对国产化未掺杂和掺杂摩尔分数3.5%BaHfO_(3)(BHO)的EuBa_(2)Cu_(3)O_(7-δ)带材进行三种不同剂量的室温辐照实验并退火.电学性能测试表明,随着辐照剂量的增加,掺杂带材的临界电流密度仍均高于未掺杂带材并且下降程度更小.透射电镜表征结果证明,超导层中通过掺杂BHO纳米相引入局域应变改变了辐照He缺陷的迁移行为,在一定范围内修复了损伤的超导结构,提高了带材载流能力的辐照耐受性.同时BHO纳米柱作为强钉扎中心使得掺杂带材临界电流密度的磁场依赖性和温度依赖性受辐照影响更小.不同于中子或重离子辐照后,通过退火可以恢复材料一定程度的超导电性,本文中大剂量He^(+)离子辐照的两种带材经氧气氛退火后,其电学性能继续恶化.相比于未掺杂带材,掺杂带材中BHO产生的局域应变在高温下抑制了辐照He缺陷在三维方向上的尺寸增长,改变了磁通钉扎特性,延缓了因氦泡长大而造成的超导层结构无序和非晶化.本研究为评估REBCO超导带材在辐照环境下的工况服役行为提供了参考依据.

关键词： REBCO超导带材辐照损伤临界电流密度微观结构表征

Procedure Design to Fulfill Quality Management System

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

厦门大学学报（自然科学版） 2002年第S1期41卷 277-278页

作者： liu Shu-qing (xi’an University of Technology, xi’an 710048, China)

With the application of the principle of PDCA, and dr awing on the experience of the process methods of the ISO9000 and the system met hods of management, the author analyses the basic requirement to fulfill quality management system in enterprises. Then the author inquires into the procedure t o establish the efficiency quality management system. Finally four stages (plan, do, check, action) and eight steps (decision, plan, analyze, design, do, check, improve, fulfill) are put forward to fulfill quality management system.

关键词： quality management system process methods fulfi ll procedure improve instantly