检索结果-南通市图书馆

Repaired morphology of CO_(2)laser rapid ablation mitigation of fused silica and its influence on downstream light modulation

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2022年第5期65卷 1116-1126页

作者： TAN Chao ZHAO linjie CHEN MingJun CHENG Jian ZHANG Yu ZHANG Jiong YANG Hao YIN ZhaoYang State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbin150001China Department of Mechanical Engineering National University of SingaporeSingapore117575Singapore

The threat of cascading damage to downstream components caused by the light modulation intensification of laser repaired morphology on the surface of fused silica optics cannot be ignored in high-power laser *** paper uses the angular spectrum diffraction theory based on the analysis of repaired surface morphology of CO_(2)laser rapid ablation mitigation to study the influence of different repaired morphologies on the downstream 355 nm laser *** show that the arc-shaped laser processing lines on the repaired surface are formed by the residual height superposition of the material after laser scanning of two adjacent layers,and the short-pulse laser can substantially suppress the heat-affected zone of the repaired *** offaxis ring caustic and on-axis hotspot are sequentially generated in the downstream modulated light fields of the conical repaired sites with different diameters.A secondary peak with modulation larger than 3 emerges downstream of the modulation ***,the maximum modulation and the secondary peak increase with the diameter and cone angle of the repaired site,and the position of the secondary peak appears farther away from the rear *** modulations of three repaired sites with cone angles of 15°,20°,and 25°can finally be stabilized below ***,the downstream optics should be installed far away from the positions where the maximum modulation and the secondary peak ***,the maximum value and the secondary peak of the downstream light modulation of double repaired sites are larger than that of the single repaired site,and both rise as the repaired sizes ***,large-scale and large-size repairing of multiple surface damages in the same area should be avoided in the laser repairing of fused silica.

关键词： fused silica laser repairing morphology light modulation secondary peak double repaired sites

在线全文

学校读者我要写书评

暂无评论

电力物联网视频安全防护网关的建模与设计

电力系统装备 2024年第2期 44-46页

作者：李哲明王湛雄黄麟杰陈聪广东电网有限责任公司湛江供电局广东湛江524001

随着电网数字化建设的不断发展,越来越多的视频终端投入到电网各典型业务场景的应用中。但许多视频采集终端存在安全漏洞,给电力物联网终端设备安全管理带来了一定挑战。为解决物联网终端的安全防护问题,文章分析了我国电力物联网视频... 详细信息

随着电网数字化建设的不断发展,越来越多的视频终端投入到电网各典型业务场景的应用中。但许多视频采集终端存在安全漏洞,给电力物联网终端设备安全管理带来了一定挑战。为解决物联网终端的安全防护问题,文章分析了我国电力物联网视频安全防护面临的主要风险,设计了电力物联网视频安全防护网关。该网关由现场视频采集终端安全防护网关及主站视频采集安全处理网关组成,提供了一种更为安全的视频传输解决方案。

关键词：电力物联网视频终端安全防护网关数据加密

Theoretical kinetic quantitative calculation predicted the expedited polysulfides degradation

维普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

Nano Research 2023年第10期16卷 12035-12042页

作者： Siyu Zhang Xianchao Rong Tao Li Wenjie Ren Hao Ren linjie Zhi Mingbo Wu Zhongtao Li State Key Laboratory of Heavy Oil Processing College of Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580China National Engineering Center of Coal slurry and Coal Chemical Co. Ltd.LTDJinan 250014China

The performance of lithium-sulfur battery is restricted by the lower value of electrode conductance and the sluggish LiPSs degradation ***,the degradation rate of polysulfides was mostly attributed to the catalytic energy barrier in previous,which is unable to give accurate predictions on the performance of lithium-sulfur ***,a quantitative framework relating the battery performance to catalytic energy barrier and electrical conductivity of the cathode host is developed here to quantitate the *** the model compound,calculated-Ti_(4)O_(7)(c-Ti_(4)O_(7))has the highest comprehensive index with excellent electrical conductivity,although the catalytic energy barrier is not *** inputting the experimental properties such as impedance and charge/discharge data into the as-build model,the final conclusion is still in line with our prediction that Ti_(4)O_(7)host shows the most excellent electrochemical ***,the accurate model here would be attainable to design lithium-sulfur cathode materials with a bottom–up manner.

关键词： lithium-sulfur batteries shuttle effect polysulfide degradation first-principles calculation semi-empirical model

基于物联网的建筑电气设备监测与远程控制技术

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

模具制造 2024年第3期24卷 197-199页

作者：雷雨鑫马林杰路洪鹏吴朝贺河北建筑工程学院河北张家口075000

介绍了基于物联网技术在建筑电气设备监测与远程控制方面的应用。概述了当前建筑电气设备监测存在的问题和挑战,阐述了物联网技术在解决这些问题中的潜在作用和优势。接着详细介绍了物联网技术在建筑电气设备监测与远程控制中的具体应用... 详细信息

介绍了基于物联网技术在建筑电气设备监测与远程控制方面的应用。概述了当前建筑电气设备监测存在的问题和挑战,阐述了物联网技术在解决这些问题中的潜在作用和优势。接着详细介绍了物联网技术在建筑电气设备监测与远程控制中的具体应用,包括传感器部署、数据采集与分析、远程控制技术等。最后,讨论了未来的研究方向和应用前景。

关键词：物联网建筑电气设备监测远程控制智能化

维普期刊数据库博看期刊

Viologens-based redox mediators with tunable HOMO–LUMO energy gap for highly effective hydrogen peroxide electrosynthesis

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第12期16卷 12936-12941页

作者： Yang Gao Xiaohui Xu Yue Niu Xinran Hu Zeyu Li Longkun Yang linjie Zhi Bin Wang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China The Beijing Key Laboratory for Nano-Photonics and Nano-Structure(NPNS) Department of PhysicsCapital Normal UniversityBeijing 100048China College of New Energy China University of Petroleum(East China)Qingdao 266580China

In comparison with the developing nano-carbon catalysts,some small organic molecules are also emerging as catalysts with typical features,however,their working mechanism is still ***,we synthesized a series of viologen-based heterogeneous catalysts with the same molecular skeleton but different substituent groups through anion exchange *** viologen-based molecules were used as a model catalyst to investigate the underlying structure–function relationship for small molecules-based H_(2)O_(2) *** from the commonly reported carbon-based electrocatalysts,viologens can produce H_(2)O_(2) in a synergistic manner,which means that viologens can not only directly catalyze oxygen reduction but also serve as a redox *** found that the ring current and H_(2)O_(2) selectivity of viologens deliver an increasing trend with the increase of the alkyl chain length of alkyl-substituted viologens and further increase when using benzyl as the substituent *** a result,a benzyl-substituted viologen(BV)delivers the best electrocatalytic performance among the samples,including the highest H_(2)O_(2) selectivity of 96.9%at 0.6 V and the largest ring current density of about 13.6 mA·***,density functional theory(DFT)calculations disclose that the carbon atoms bonded with positively charged N are the active sites and the small highest occupied molecular orbital(HOMO)–lowest unoccupied molecular orbital(LUMO)energy gap of BV is beneficial to the synergistic mechanism for H_(2)O_(2) *** work sheds new insight into the efficient H_(2)O_(2) production in a synergistic manner for small molecules-based electrocatalysts.

关键词： viologens electrocatalysis hydrogen peroxide redox mediator oxygen reduction

反应等离子喷涂TiC-SiC复合涂层及其热稳定性

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

材料科学与工艺 2024年第4期32卷 48-56页

作者：潘浩宇穆佳雨穆林杰丁一鸣邱彦秦艳芳宋劲松苏州科技大学机械工程学院江苏苏州215009 河北石油职业技术大学工业技术中心河北承德067000

具有强共价键结合的碳化物和硅化物是高温防护涂层重要的候选材料,但单相材料通常难以达到良好的综合性能。为提高单相TiC陶瓷的高温性能,本文以Ti、石墨粉及SiC为原料,采用反应等离子喷涂制备了TiC-SiC复合涂层,利用XRD和SEM对涂层物... 详细信息

具有强共价键结合的碳化物和硅化物是高温防护涂层重要的候选材料,但单相材料通常难以达到良好的综合性能。为提高单相TiC陶瓷的高温性能,本文以Ti、石墨粉及SiC为原料,采用反应等离子喷涂制备了TiC-SiC复合涂层,利用XRD和SEM对涂层物相组成、结构及形貌进行了研究,并对比分析了涂层的显微硬度及其Weibull分布特点。研究表明:Ti粉与石墨粉间发生反应合成TiC,沉积涂层以TiC、SiC为主相;Ti-C-5wt.%SiC制备涂层的平均显微硬度(1070.8HV0.2)略低于Ti-C-20wt.%SiC制备的涂层(1127HV0.2),但其硬度分散性系数β和相关系数R均高于Ti-C-20wt.%SiC复合粉制备的涂层,这源于Ti-C-5wt.%SiC制备涂层相对均匀的显微结构。另外,900~1100℃热冲击性能及1000℃氧化性能的测试结果表明,Ti-C-5wt.%SiC制备的涂层具有更为优异的抗热冲击性和抗氧化性,这是由于该涂层具有较高的致密性,极大延缓了氧气进入涂层的时间。

关键词：反应等离子喷涂 TiC-SiC 复合涂层 Weibull分布热稳定性

改良小针刀松解踇收肌联合正骨复位治疗轻中度踇外翻临床观察

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

中国中医药现代远程教育 2024年第18期22卷 120-123页

作者：钟水平叶林杰傅俊卒陈秋生赣州市立医院骨科江西赣州341000

目的对照研究改良小针刀松解踇收肌联合中医正骨复位治疗轻中度踇外翻的临床效果。方法选取于赣州市立医院骨科就诊的轻中度踇外翻患者60例,依据随机数字表法分为干预组、对照组,各30例。干预组给予改良小针刀松解踇收肌联合中医正骨复... 详细信息

目的对照研究改良小针刀松解踇收肌联合中医正骨复位治疗轻中度踇外翻的临床效果。方法选取于赣州市立医院骨科就诊的轻中度踇外翻患者60例,依据随机数字表法分为干预组、对照组,各30例。干预组给予改良小针刀松解踇收肌联合中医正骨复位治疗,对照组佩戴矫形支具干预。统计分析两组踇外翻角度(HVA)、足外观改善情况、足部功能、相关不良事件发生率、复发情况、下地负重时间及治疗费用。结果治疗当天及治疗4周、8周后,干预组HVA均低于对照组(P<0.05)。治疗后,干预组足外观总改善率为96.67%(29/30),高于对照组的73.33%(22/30)(P<0.05);疼痛、足部对线、关节功能评分及踝关节功能评分(AOFAS)总分均高于对照组(P<0.05);下地负重时间短于对照组,治疗费用低于对照组(P<0.05)。干预组复发率为3.33%(1/30),低于对照组的20.00%(6/30)(P<0.05)。结论改良小针刀松解踇收肌联合中医正骨复位治疗轻中度踇外翻的临床效果较佩戴矫形支具干预效果好。

关键词：踇外翻矫形支具中医正骨疗法小针刀松解术中医外治法

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

高精度薄厚膜异构HTCC基板制备工艺

微纳电子技术 2024年第7期61卷 150-155页

作者：张鹤杨鑫谢岳杨振涛刘林杰中国电子科技集团公司第十三研究所石家庄050051

针对高温共烧陶瓷(HTCC)基板高平整度、高密度封装需求,提出了一种高精度薄厚膜异构HTCC基板的制备方法,并对其关键工艺进行研究。结合陶瓷基板精密研磨工艺与薄膜制备工艺,该方法在大幅降低原有HTCC基板的平面度、粗糙度的同时,实现HTC... 详细信息

针对高温共烧陶瓷(HTCC)基板高平整度、高密度封装需求,提出了一种高精度薄厚膜异构HTCC基板的制备方法,并对其关键工艺进行研究。结合陶瓷基板精密研磨工艺与薄膜制备工艺,该方法在大幅降低原有HTCC基板的平面度、粗糙度的同时,实现HTCC表面精密布线。测量结果表明,薄厚膜HTCC基板的平面度低至15μm,表面布线最小线宽低至10μm,与传统陶瓷基板平面度(30μm)与最小线宽(50μm)相比均有较大改善。在此基础上,研究了不同种子层厚度对薄厚膜异构HTCC基板结合力的影响。结果表明当钛钨层厚度为150 nm时,薄膜层和陶瓷基板结合力高达9.27 gf(1 gf=0.0098 N)。

关键词：多层共烧陶瓷薄膜金属化封装基板异构集成键合强度

“金花”菌的分离鉴定及其对紫娟红茶发酵品质的影响

在线全文

学校读者我要写书评

暂无评论

食品研究与开发 2024年第5期45卷 44-52页

作者：周祎炜燕飞曲东李新生谢侗闫瑞瑞习林杰陈小华赵璇陕西理工大学生物科学与工程学院陕西汉中723000 陕西省资源生物重点实验室陕西汉中723000 陕南秦巴山区生物资源综合开发协同创新中心陕西汉中723000 陕西省“四主体一联合”茶产业校企联合研究中心陕西汉中723000

为探究泾阳散装茯砖茶中“金花”菌的种类及其对紫娟红茶品质的影响,从泾阳散装茯砖茶中分离得到谢瓦曲霉(Aspergillus chevalieri),并用其对紫娟红茶进行固态发酵。结果表明,紫娟红茶经发酵后,“金花”菌数量极显著增加,茶汤色泽由亮... 详细信息

为探究泾阳散装茯砖茶中“金花”菌的种类及其对紫娟红茶品质的影响,从泾阳散装茯砖茶中分离得到谢瓦曲霉(Aspergillus chevalieri),并用其对紫娟红茶进行固态发酵。结果表明,紫娟红茶经发酵后,“金花”菌数量极显著增加,茶汤色泽由亮黄色变为橙红色;同时茶多酚、儿茶素、水浸出物、游离氨基酸、茶黄素和茶红素均整体出现不同程度的下降,而花青素、总黄酮含量整体呈升高的变化趋势。经谢瓦曲霉发酵后的紫娟红茶不仅能有效改善其茶汤色泽滋味,还可以促进紫娟红茶发酵过程中抗氧化物质的释放。

关键词：紫娟红茶谢瓦曲霉散茶发花茶叶品质抗氧化活性