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双叶幕层棚架栽培对“SN2016”猕猴桃性状的影响

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中国南方果树 2024年第3期53卷 247-250页

作者：舒秀写李建华田太原贵州省施秉县农业农村局农村经济经营与农业信息服务站贵州施秉556299 贵州省施秉县农业农村局经济作物技术推广站贵州施秉556299 贵州省施秉县科技服务中心贵州施秉556299

以“SN2016”猕猴桃为试材,比较双叶幕层棚架(在平顶棚架上建斜面牵引层)和平顶棚架猕猴桃主要性状表现。结果发现,双叶幕层棚架猕猴桃主要生长特性及经济性状如萌芽率、结果枝率、平均单果质量、可溶性固形物及产量均高于平顶棚架;营... 详细信息

以“SN2016”猕猴桃为试材,比较双叶幕层棚架(在平顶棚架上建斜面牵引层)和平顶棚架猕猴桃主要性状表现。结果发现,双叶幕层棚架猕猴桃主要生长特性及经济性状如萌芽率、结果枝率、平均单果质量、可溶性固形物及产量均高于平顶棚架;营养枝二次梢和三次梢萌发率均低于平顶棚架。双叶幕层棚架作为猕猴桃优选栽培架式,在生产中有推广应用价值。

关键词：猕猴桃双叶幕层棚架平顶棚架架式

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FT 合成用铁催化剂化学形态的研究

燃料化学学报 1988年第4期 313-320页

作者：黄止而李哲中国科学院山西煤炭化学研究所中国科学院地质研究所太原北京

采用穆斯堡尔谱方法,研究了FT 合成用熔铁、沉淀铁、载体铁三种类型的催化剂在灼烧、还原、于合成气中反应后铁的化学形态及其变化。研究结果表明,铁催化剂中存在着助催化剂、载体与铁相间的相互作用,这种相互作用导致铁的化学形态变化... 详细信息

采用穆斯堡尔谱方法,研究了FT 合成用熔铁、沉淀铁、载体铁三种类型的催化剂在灼烧、还原、于合成气中反应后铁的化学形态及其变化。研究结果表明,铁催化剂中存在着助催化剂、载体与铁相间的相互作用,这种相互作用导致铁的化学形态变化及穆斯堡尔超精细参数的改变。

关键词：铁催化剂助催化剂穆斯堡尔谱化学形态化学种态 FT

机器人与腹腔镜左半结肠癌根治性切除术近期疗效对照研究

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实用医学杂志 2020年第18期36卷 2551-2554,2558页

作者：孙焕奎李太原温祥琼郑林林胡家平南昌大学第一附属医院普外科南昌330000

目的通过对比机器人与腹腔镜手术治疗左半结肠癌的近期疗效,评估机器人辅助左半结肠癌根治术的可行性和安全性。方法回顾性收集2017年1月至2019年6月南昌大学第一附属医院收治的195例行左半结肠癌根治术的患者临床资料,其中105例行机器... 详细信息

目的通过对比机器人与腹腔镜手术治疗左半结肠癌的近期疗效,评估机器人辅助左半结肠癌根治术的可行性和安全性。方法回顾性收集2017年1月至2019年6月南昌大学第一附属医院收治的195例行左半结肠癌根治术的患者临床资料,其中105例行机器人辅助左半结肠癌根治性切除术(机器人组),90例行腹腔镜辅助左半结肠癌根治性切除术(腹腔镜组)。统计手术时间、术中出血量、切除淋巴结总数、转移淋巴结总数、术后住院时间、术后首次排气时间、首次下床活动时间、流质饮食时间、术后并发症、切口总长度、术后第1天疼痛评分、住院费用等临床数据。结果两组均无围手术期死亡病例。机器人组与腹腔镜组中转开腹率、淋巴结清扫数目、术后住院时间、流质饮食时间、术后第1天疼痛评分、术后并发症比较差异无统计学意义(P>0.05)。机器人组较腹腔镜组术中出血量更少[(133±92)mL vs.(147±75)mL,t=7.217,P<0.05],首次排气时间更早[(47.4±16.2)h vs.(52.7±11.3)h,t=-2.425,P<0.05],首次下床活动时间更快[(25.9±1.1)h vs.(28.2±2.1)h,t=-9.431,P<0.05],切口总长度更短[(5±1)cm vs.(7±3)cm,t=-4.735,P<0.05]。结论左半结肠癌患者行机器人辅助左半结肠癌根治性切除术安全可行;与腹腔镜手术相比,其术中出血少,且术后恢复较腹腔镜更快。

关键词：结肠癌左半结肠切除术达芬奇机器人手术系统腹腔镜

Visual experimental study of nanofluids application to promote CO_(2) absorption in a bubble column

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Chinese Journal of Chemical Engineering 2024年第3期67卷 228-237页

作者： Shangyuan Cheng Guisheng Qi Yuliang li Yixuan Yang Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering North University of ChinaTaiyuan 030051China

The addition of dispersed-phase nanoparticles in the liquid phase can enhance the gas-liquid transfer process as the suspended nanoparticles affect the transfer process inside the fluid through microdisturbance or micro-convection *** this article,a high-speed digital camera was used to visualize the bubble behavior of CO_(2) in pure water and nanofluids to examine the effects of CO_(2) gas flow rate,nanoparticle solid content and type on the bubble behavior in the *** CO_(2) absorption performance in three water-based nanofluids were compared in a *** the mass transfer characteristics during CO_(2) bubble absorption and the reasons for the enhanced gas-liquid mass transfer effect of nanoparticles were *** results showed that the presence of nanoparticles affected the formation process of bubbles in the fluid,shortened the bubble detachment time,reduced the detachment diameter,effectively increased the gas-liquid contact area,and improved the bubbles detachment *** system with MCM-41 corresponded to a higher overall mass transfer *** MCM-41 contained surfactant that enhanced foaming behavior in *** prevented the transfer of CO_(2) to some extent,and the CO_(2) absorption by uncalined MCM-41/H_(2)O was 5.34%higher than that by pure *** with SiO_(2) nanoparticles with the same particle size and the same composition,MCM-41 had a higher adsorption capacity and better hydrophilicity due to its larger specific surface area and rich porous structure,which was more favorable to accelerate the collision between nanoparticles and CO_(2) bubbles to cause *** the condition of 0.1%(mass)solid content,the enhancement of CO_(2) absorption process by MCM-41 nanoparticles was more significant and improved by 16.9%compared with pure water.

关键词： Nanofluids CO_(2) absorption Mass transfer MCM-41 Bubble column

Distributed Multicircular Circumnavigation Control for UAVs with Desired Angular Spacing

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Defence Technology（防务技术） 2024年第1期31卷 429-446页

作者： Shixiong li Xingling Shao Wendong Zhang Qingzhen Zhang National Key Laboratory for Electronic Measurement Technology School of Instrument and ElectronicsNorth University of ChinaTaiyuan 030051China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100086China

This paper addresses a multicircular circumnavigation control for UAVs with desired angular spacing around a nonstationary *** defining a coordinated error relative to neighboring angular spacing,under the premise that target information is perfectly accessible by all nodes,a centralized circular enclosing control strategy is derived for multiple UAVs connected by an undirected graph to allow for formation behaviors concerning the moving ***,to avoid the requirement of target’s states being accessible for each UAV,fixed-time distributed observers are introduced to acquire the state estimates in a fixed-time sense,and the upper boundary of settling time can be determined offline irrespective of initial properties,greatly releasing the burdensome communication ***,with the aid of fixed-time distributed observers,a distributed circular circumnavigation controller is derived to force all UAVs to collaboratively evolve along the preset circles while keeping a desired angular *** is inferred from Lyapunov stability that all errors are demonstrated to be *** are offered to verify the utility of proposed protocol.

关键词： Angular spacing Distributed observer Multicircular circumnavigation Moving target UAVs

Modeling analysis of cobalt-based Fischer-Tropsch catalyst particles

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Chinese Journal of Chemical Engineering 2024年第6期70卷 82-92页

作者： Huashuai Wu Gang Wang Yong Yang Yongwang li College of Chemical Engineering and Technology Taiyuan University of TechnologyTaiyuan 030024China National Energy Research&Development Center for Coal to liquid Fuels Synfuels China CompanyLimitedBeijing 101400China

The influences of particle size,shape,and catalyst distribution on the reactivity and hydrocarbon product selectivity of a cobalt-based catalyst for Fischer-Tropsch synthesis were investigated in the present work.A self-consistent kinetic model for Fischer-Tropsch reaction proposed here was found to correlate experimental data well and hence was used to describe the consumption rates of reactants and formation rates of hydrocarbon *** perturbed-chain statistical associating fluid theory equation of state was used to describe vapor-liquid equilibrium behavior associated with Fischer-Tropsch *** interaction between intraparticle diffusion and Fischer-Tropsch reaction was investigated in *** showed that in order to avoid the adverse influence of intraparticle diffusional limitations on catalyst reactivity and product selectivity,the use of small particles is *** eggshell spherical particles are shown to keep the original catalyst reactivity and enhance the selectivity of heavy hydrocarbon *** suitable layer thickness for a spherical particle with a diameter of 2 mm is nearly 0.15 *** the same outer diameter of 2 mm,the catalyst reactivity and heavy product selectivity of hollow cylindrical particles with a layer thickness of 0.25 mm are found to be larger than eggshell spherical *** the viewpoint of catalytic performance,hollow cylindrical particles are a better choice for industrial applications.

关键词： Fischer-Tropsch synthesis Kinetic modeling Vapor-liquid equilibria Numerical simulation Intraparticle diffusion Particle shapes

Efficacy and safety of a neurointerventional operation robotic assistance system in cerebral angiography

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Stroke & Vascular Neurology 2024年第3期9卷 243-251,I0210-I0240页

作者： He liu Conghui li Shaohua Ren Tong li Hongliang Zhong Jianwen Jia Hongchao Yang Yi Qi Junqiang Feng Youxiang li Yang Wang Department of Neurosurgery Beijing Chao-Yang HospitalCapital Medical UniversityBeijingChina Department of Neurosurgery Hebei Medical University First Affiliated HospitalShijiazhuangHebeiChina Department of Neurosurgery Shanxi Provincial People’s HospitalShanxiTaiyuanChina Department of Neurosurgery Beijing Tiantan HospitalCapital Medical UniversityBeijingChina

Background At present,neurointerventional surgery requires angiographers to perform operations in the digital subtraction angiography(DSA)*** radiation and chronic joint damage are still unavoidable for ***,we researched and developed a neurointerventional robot-assisted system,which is operated by angiographers in an operating room outside the DSA *** have conducted a prospective,multicentre,randomised controlled trial to evaluate the safety and efficacy of a robot-assisted system in human cerebral *** the future,this research will provide a platform for the research and development of an intelligent surgical system and bring revolutionary progress in neurointerventional *** From December 2020 to December 2021,260 patients were enrolled from three medical centres,who were randomly and equally divided into a robot-assisted system group and a clinical routine cerebral angiography *** success rate of angiography,the rate of the catheter reaching the target vessel,the operation time,X-ray radiation exposure and the incidence of related adverse events were compared between the two *** A total of 257 patients completed this trial;baseline characteristics of the two groups did not differ *** success rate of angiography in both the control group and the experimental group was 100%.The rate of the catheter reaching the target vessel was 99.23%and 100.00%in the control and experimental groups,*** the control versus experimental groups,the angiographic operation time was 48.59±25.60min versus 47.94±27.49min,respectively;the X-ray radiation dose was 735.01±554.77mGy versus 821.65±705.45mGy,respectively;and the incidence of adverse events was 23.44%versus 22.48%,*** statistical differences were present between the two *** The robot-assisted surgical system is more convenient for cerebral angiography and is as safe and effective as the traditional cerebr

关键词： cerebral operation routine

Corrosion Behavior of Graphene Nanosheets Reinforced Magnesium Matrix Composites in Simulated Body Fluids

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Acta Metallurgica Sinica(English Letters) 2024年第3期37卷 525-536页

作者： liwen Chen Jianhui Jing Lulu Zhang Jing li Weipeng Chen limin li Yuan Zhao Hua Hou Yuhong Zhao School of Materials Science and Engineering Collaborative Innovation Center of Ministry of Education and Shanxi Province for High-Performance Al/Mg Alloy MaterialsNorth University of ChinaTaiyuan 030051China Shanxi Key Laboratory of Advanced Manufacturing Technology School of Mechanical EngineeringNorth University of ChinaTaiyuan 030051China School of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang 110004China

Magnesium(Mg)alloy is considered as a promising biodegradable implant material but restricted to rapid ***,the new strategies based on thixomolding process had been explored to utilize the outstanding anti-permeability of graphene nanosheets(GNPs)while inhibit its galvanic corrosion with the matrix,so as to improve the corrosion resistance of *** agglomerate of GNPs with 0.9 wt%content is the main reason for the deterioration of corrosion performance due to the formation of micro-galvanic *** grain refinement of composites with 0.6 wt%content had positive effects on the better corrosion *** process adjusting,the unique distributions of GNPs along grain boundaries play a vital role in improving the corrosion *** can be ascribed to the following mechanisms:(I)The barriers can be established between the Mg matrix and corrosive medium,hence blocking the charge transfer at the interface;(II)The GNPs can effectively promote apatite deposition on the Mg matrix,leading to form dense apatite layers and prevent the further invasion of SBF;(III)The GNPs acting as reinforcements exists in the corrosion layer and apatite layer,impede the apatite layer falling off from the Mg *** findings broaden the horizon for biomedical applications in Mg matrix composites to realize desired performances.

关键词： Magnesium matrix composite Graphene nanosheets Corrosion resistance

特异性溶瘤腺病毒调控肺癌细胞表达PD-L1及诱导凋亡的研究

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中国免疫学杂志 2022年第4期38卷 432-436页

作者：李亭玉刘行李一权李文杰李善智王政于桐于成东孟媛李太元(指导) 李霄(指导) 金宁一(指导) 延边大学农学院延吉133000 军事科学院军事兽医研究所长春130122 吉林大学第一医院长春130021 长春中医药大学长春130117

目的:探究特异性溶瘤腺病毒(Ad-Mock、Ad-T)对肺癌细胞上PD-L1表达的调控作用及对细胞凋亡的影响。方法:采用荧光定量PCR法及Western blot检测溶瘤腺病毒在24 h和48 h对NCI-H446、NCI-H226、A549细胞表达PD-L1的影响;通过结晶紫染色、WS... 详细信息

目的:探究特异性溶瘤腺病毒(Ad-Mock、Ad-T)对肺癌细胞上PD-L1表达的调控作用及对细胞凋亡的影响。方法:采用荧光定量PCR法及Western blot检测溶瘤腺病毒在24 h和48 h对NCI-H446、NCI-H226、A549细胞表达PD-L1的影响;通过结晶紫染色、WST-1、Hoechst与JC-1法检测溶瘤腺病毒对肺癌细胞的凋亡抑制作用。结果:特异性溶瘤腺病毒在24 h和48 h均可抑制肺癌细胞表达PD-L1,抑制情况为Ad-T>Ad-Mock,且PD-L1表达量与作用时间呈负相关;溶瘤腺病毒对3种肺癌细胞均具有抑制作用并通过降低线粒体膜电位的方式诱导细胞凋亡,且抑制效果为Ad-T>Ad-Mock,抑制作用与时间呈正相关。结论:特异性溶瘤腺病毒可以抑制肺癌细胞PD-L1的表达并可诱导肺癌细胞的凋亡,对肺癌细胞具有抑制作用。

关键词：溶瘤腺病毒肺癌 PD-L1 免疫逃逸凋亡

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