检索结果-南通市图书馆

Co-Ru/HAP的制备及其催化乙二醇氨化反应

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

高校化学工程学报 2024年第4期38卷 566-577页

作者：郭浩林李健朋赵新强安华良赵茜王延吉河北工业大学化工学院河北省绿色化工与高效节能重点实验室天津300130

为提高乙二醇氨化反应中乙二胺的选择性,以羟基磷灰石(HAP)为载体、Co为主活性组分,引入第二金属组分制备了一系列负载型双金属催化剂。结果表明,Co-Ru/HAP催化效果较优,适宜制备条件为:制备HAP的pH值为10、金属总质量分数为9%、Co与Ru... 详细信息

为提高乙二醇氨化反应中乙二胺的选择性,以羟基磷灰石(HAP)为载体、Co为主活性组分,引入第二金属组分制备了一系列负载型双金属催化剂。结果表明,Co-Ru/HAP催化效果较优,适宜制备条件为:制备HAP的pH值为10、金属总质量分数为9%、Co与Ru质量比m(Co):m(Ru)为10:1、还原温度为500℃。此时,乙二醇转化率为30.2%,乙二胺选择性为35.4%,乙二胺和乙醇胺选择性之和为58.0%。结合催化剂表征和活性评价结果可知,金属Co主要促进氨化过程中脱氢和加氢步骤,而金属Ru主要是抑制NH3在金属Co表面的吸附,以保证有较多的Co金属位活化乙二醇;催化剂的酸碱活性位点存在明显的协同作用。采用气相色谱-质谱联用技术对乙二醇氨化反应液进行了定性分析,在此基础上,建立了Co-Ru/HAP催化乙二醇氨化的反应网络。

关键词：乙二醇乙二胺催化氨化协同作用反应网络

Investigation of high-quality-factor aluminum nitride MEMS cantilever resonators

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nanotechnology and Precision Engineering 2024年第1期7卷 32-43页

作者： Shuai Shi Qingrui Yang Yi Yuan haolin Li Pengfei Niu Wenlan guo Chen Sun Wei Pang State Key Laboratory of Precision Measuring Technology and Instruments Tianjin UniversityTianjin 300072China

This paper presents the design,fabrication,and characterization of cantilever-type resonators with a novel stacked *** nitride is adopted as the material for both the structural layer and the piezoelectric layer;this simpliﬁes the fabrication process and improves the quality factor of the *** in-plane and out-of-planeﬂexural modes were *** effect of the structural dimensions and electrode patterns on the resonator’s performance were also ***-element simulations and experiments examining anchor loss and thermoelastic damping,which are the main loss mechanisms affecting the quality factor of these resonators,were carried *** optimal structural dimensions and electrode patterns of the cantilever-type resonators are presented.A quality factor of 7922 with a motional impedance of 88.52 kΩand a quality factor of 8851 with a motional impedance of 67.03 kΩwere achieved for the in-plane and out-of-planeﬂexural-mode resonators,*** proposed resonator design will contribute to the development of high-performance devices such as accelerometers,gyroscopes,and pressure sensors.

关键词： MEMS Cantilever-type micro-resonator AlN Finite-element simulation

在线全文

学校读者我要写书评

暂无评论

刘启泉应用化浊解毒法论治胃癌前病变经验

山东中医杂志 2024年第7期43卷 751-755页

作者：李红京宋聪敏王斌郭浩林郑世豪董新悦刘启泉(指导) 河北中医药大学第一附属医院河北石家庄050011

胃癌前病变是慢性萎缩性胃炎向胃癌发展的关键环节,延缓或截断本病的进展对降低胃癌的发生意义重大。刘启泉教授提出“浊毒相干为害”贯穿本病始终,临证时根据疾病发展不同阶段,灵活应用理气化湿、清热活血、健脾运脾、温肾滋阴等法以... 详细信息

胃癌前病变是慢性萎缩性胃炎向胃癌发展的关键环节,延缓或截断本病的进展对降低胃癌的发生意义重大。刘启泉教授提出“浊毒相干为害”贯穿本病始终,临证时根据疾病发展不同阶段,灵活应用理气化湿、清热活血、健脾运脾、温肾滋阴等法以化浊解毒,同时,对无证可辨、有病可医者,注重宏观与微观相结合,精准用药,延缓病势,遏制进展,颇获良效。

关键词：胃癌前病变浊毒相干为害化浊解毒微观辨证刘启泉

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

刘启泉运用腹诊辨治慢性萎缩性胃炎之经验

江苏中医药 2024年第6期56卷 9-12页

作者：石芳刘阳郭浩林崔长通张春云张娜娜赵健森王志坤刘启泉(指导) 河北省中医院河北石家庄050011 河北省脾肾病证中医治疗技术创新中心河北石家庄050011 河北中医药大学第一附属医院河北石家庄050011 不详

慢性萎缩性胃炎是一种慢性难治性胃部疾病,本病病情迁延难愈,治疗周期较长,严重影响患者的生活质量。刘启泉教授认为本病病位在胃,病机为气机郁滞、湿浊中阻、热毒蕴结、瘀血停滞、阴液亏虚。针对以上病机,刘教授在常规四诊基础上结合... 详细信息

慢性萎缩性胃炎是一种慢性难治性胃部疾病,本病病情迁延难愈,治疗周期较长,严重影响患者的生活质量。刘启泉教授认为本病病位在胃,病机为气机郁滞、湿浊中阻、热毒蕴结、瘀血停滞、阴液亏虚。针对以上病机,刘教授在常规四诊基础上结合中医腹诊,确立了气滞腹证、湿阻腹证、热结腹证、血瘀腹证、阴虚腹证五种常见腹证,在明辨慢性萎缩性胃炎病机、指导遣方用药、判断转归预后等方面发挥重要的作用。附验案1则以佐证。

关键词：慢性萎缩性胃炎腹诊腹证刘启泉名医经验

Innovations in metallurgical and materials processes:advancing liquid theory and honoring ***-jie guo's contributions to physical chemistry in metallurgy

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2024年第1期31卷 1-2页

作者： Shuai Liu Jing guo Han-jie guo School of Artificial Intelligence Beijing Technology and Business UniversityBeijing100048China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing(USTB)Beijing100083China

Spanning three decades,***-jie guo's research group has dedicated itself to exploring the fundamental theories and practical applications of physical chemistry within the realm of *** under the assumption that molecul... 详细信息

关键词： chemistry liquid complexes

刘启泉基于“六腑以通为补”论治慢性萎缩性胃炎经验

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

辽宁中医杂志 2024年第4期51卷 25-28页

作者：郑世豪张乃霖梁笑妍郭浩林宋聪敏李红京刘启泉北京中医药大学东直门医院北京100700 北京中医药大学北京100029 河北中医药大学第一附属医院河北石家庄050000 广州中医药大学广东广州510006 河北省中医院河北石家庄050000

该文将刘启泉教授从“六腑以通为补”理论出发论治慢性萎缩性胃炎(CAG)的经验介绍如下。生动阐释了六腑与慢性萎缩性胃炎的生理与病理关系,简要说明了从六腑论治慢性萎缩性胃炎的理论基础,认为其病位虽在胃,却与六腑密切相关。慢性萎缩... 详细信息

该文将刘启泉教授从“六腑以通为补”理论出发论治慢性萎缩性胃炎(CAG)的经验介绍如下。生动阐释了六腑与慢性萎缩性胃炎的生理与病理关系,简要说明了从六腑论治慢性萎缩性胃炎的理论基础,认为其病位虽在胃,却与六腑密切相关。慢性萎缩性胃炎的发病与“胃宜降则和”有着重要的联系,而人体之六腑均与足阳明胃之通降密切相关,胆、胃、大肠、小肠、三焦、膀胱得以通调,CAG即可得到缓解。刘师从“谨守病机”入手,在临床上运用通泄胆腑、通降胃腑、通调大肠、通利小肠、通畅三焦、通达膀胱六法,以达到缓解CAG症状、使萎缩的胃黏膜得以逆转的效果。刘师在临证潜方用药时根据患者实际情况之不同而具体化裁,谨守“六腑以通为补”理论,遵叶氏“忌刚用柔”之旨,灵活运用泄胆腑、降胃腑、调大肠、利小肠、畅三焦、达膀胱之药,六腑并治,气血同调,达到通六腑以安胃的目的,最终实现以通为补,以期有效逆转腺体萎缩的镜下病理表现,防止疾病进一步恶化。

关键词：刘启泉慢性萎缩性胃炎六腑以通为补名医经验

维普期刊数据库博看期刊

同方期刊数据库

在线全文

学校读者我要写书评

暂无评论

波浪能发电控制技术研究综述

电力自动化设备 2023年第6期43卷 124-136页

作者：陈佳兰飞郭昊霖黎静华广西大学广西电力系统最优化与节能技术重点实验室广西南宁530004

开展波浪能发电技术控制方面的研究可有效平抑电力输出的波动性,显著提升电能质量,对充分利用波浪能具有积极意义。为了让研究人员全面了解当前的研究水平和未来研究方向,对近年来国内外波浪能发电系统控制技术的研究情况进行了梳理和... 详细信息

开展波浪能发电技术控制方面的研究可有效平抑电力输出的波动性,显著提升电能质量,对充分利用波浪能具有积极意义。为了让研究人员全面了解当前的研究水平和未来研究方向,对近年来国内外波浪能发电系统控制技术的研究情况进行了梳理和总结。基于国内外波浪能发电控制技术的研究成果,对波浪能发电控制技术的分布情况及热点问题进行分析;以波浪能发电装置安装位置、波浪能能量转换方式、功率输出方式为分类依据,对波浪能发电系统进行介绍;以最大功率点跟踪控制和电能质量控制为线索对波浪能发电控制技术进行分类,对控制原理、技术特点和应用情况进行对比分析。最后,对该领域后续的研究方向进行探讨和展望。该研究成果能为波浪能发电的高效转换和稳定输出控制研究提供参考。

关键词：波浪能发电控制技术最大功率点跟踪控制电能质量控制海洋能利用

Emerging direct current triboelectric nanogenerator for high-entropy mechanical energy harvesting

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2024年第5期67卷 1297-1316页

作者： CHEN Jie guo RuiLong guo HengYu College of Physics and Electronic Engineering Chongqing Normal UniversityChongqing 401331China Department of Applied Physics Chongqing UniversityChongqing 401331China

In the era of the Internet of Things(IoT),the provision of sustainable power to distributed,mobile,and low-power-consumption electronic devices is a critical *** overcome this challenge,the triboelectric nanogenerator(TENG),a highly efficient high-entropy mechanical energy harvesting device,was developed in *** device enables the direct conversion of irregular and low-frequency mechanical energy into pulsed alternating current(AC)***,the incompatibility of most electronic devices with AC signals necessitates rectifier circuits or generators that deliver direct current(DC)*** recent years,DC-TENGs have undergone extensive development,achieving significant milestones in various application fields while also facing crucial challenges that require *** this review,three categories of DC-TENG devices with distinct operating mechanisms are comprehensively explored:multiphase coupling,mechanical rectification,and air *** typical structures and working mechanisms are thoroughly discussed,and specific output performance limitations,along with corresponding optimization strategies,are ***,the applications of DC-TENGs in various scenarios are ***,the challenges faced by DC-TENGs and potential solutions are analyzed to guide further advancements in this technology.

关键词： TENG direct current working mechanisms output performance limitations optimization strategies

Physicochemical principles of hydrogen metallurgy in blast furnace

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2024年第1期31卷 46-63页

作者： Han-jie guo School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials Beijing100083China

Based on the stoichiometric method and the free energy minimization method,an ideal model for the reduction of iron oxides by carbon and hydrogen under blast furnace conditions was established,and the reduction efficiency and theoretical energy consumption of the all-carbon blast furnace and the hydrogen-rich blast furnace were *** results show that after the reduction reaction is completed at the bottom of the blast furnace,the gas produced by reduction at 1600℃still has a certain excessive reduction capacity,which is due to the hydrogen brought in by the hydrogen-rich blast as well as the excess carbon monoxide generated by the reaction of the coke and the oxygen brought in by the *** the process of the gas with excessive reduction capacity rising from the bottom of the blast furnace and gas reduction process,the excessive reduction capacity of the gas gradually decreases with the increase in the dydrogen content in the *** the all-carbon blast furnace,the excess gas reduction capacity is the strongest,and the total energy consumption per ton of iron reduction is the *** shows that,for the current operation mode of the blast furnace,adding hydrogen in the blast furnace cannot reduce the consumption of carbon required for reduction per ton of iron,but rather increases the consumption of carbon.

关键词： Hydrogen metallurgy Excess gas reduction capacity Theoretical energy consumption Hydrogen-rich blast furnace Thermodynamic model Gibbs minimum free energy method