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高炉块矿比例提升措施研究

山西冶金 2024年第8期47卷 177-180页

作者：李艳斌谢师威刘雪伟王德全佘雪峰德龙钢铁有限公司河北邢台054009 北京科技大学钢铁冶金新技术国家重点实验室北京100083 河北省热轧板带钢技术创新中心河北邢台054009

对某高炉开展块矿比例提升实践,采取烘干、控制振筛下料量等措施加强块矿筛分,减少粉末入炉;通过调整装料制度、送风制度、造渣制度,提高渣铁排放;在煤比达160 kg/t以上的条件下,将块矿入炉比例提高至17%~20%。采取相关措施后,高炉内透... 详细信息

对某高炉开展块矿比例提升实践,采取烘干、控制振筛下料量等措施加强块矿筛分,减少粉末入炉;通过调整装料制度、送风制度、造渣制度,提高渣铁排放;在煤比达160 kg/t以上的条件下,将块矿入炉比例提高至17%~20%。采取相关措施后,高炉内透气性和压差合理,保障了高炉煤气流畅通、分布合理,炉渣黏度降低,实现了高炉稳定生产,降低铁水成本30元/t以上。

关键词：块矿比例操作制度热爆裂指数软熔性能

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数字化融合技术在网格化服务创新中的应用

电子技术（上海） 2024年第7期53卷 320-321页

作者：田园冯隆基吴芳柱楚成博陈雪薇谢林红国网南京供电公司江苏210019

阐述数字化转型对网格融合服务的影响。探讨网格融合服务在能源管理、智慧城市建设、环境保护中的应用。分析数字化转型下的网格融合服务创新所面临的挑战,提出策略和建议。

关键词：数字化转型网格融合服务智慧城市

A Rational Design of Heterojunction Photocatalyst Cd S Interfacing with One Cycle of ALD Oxide

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Journal of Materials Science & Technology 2016年第6期32卷 489-495页

作者： Mengyin Liu Xinjian xie Lei Chen xuewei Wang Yahui Cheng Feng Lu Wei-Hua Wang Jing Yang Xiwen Du Junda Zhu Haitao Liu Hong Dong Weichao Wang Hui Liu Department of Electronics and Key Laboratory of Photo-Electronic Thin Film Devices and Technology of Tianjin Nankai University School of Material Science and Engineering Hebei University of Technology Institute of Material Physics Key Laboratory of Display Materials and Photoelectric DevicesTianjin University of Technology Tianjin Key Laboratory of Composite and Functional Materials and School of Materials Science and Engineering Tianjin University Key Laboratory of Optical Information Science and Technology Ministry of EducationInstitute of Modern OpticsNankai University

Photo-corrosion is one of the major obstacles for CdS application in wet chemical fields, and atomic layer deposition （ALD） has been proposed as an effective way to suppress the corrosion. Here, prior to ALD coating, CdS, one facilely corrosive photocatalyst, was synthesized via hydrothermal synthesis to access the fundamental corrosion mechanism and the according corrosive sites. X-ray photoelectron spectros- copy （XPS） and X-ray diffraction （XRD） demonstrated that the failure of catalytic decomposition of methylene blue originated from the formation of soluble CdSO4 by oxidizing S2 of as-prepared CdS. High resolu- tion transmission electron microscopy （HRTEM） further identified the active sites in the V-shaped regions ofCdS nanoparticles, confirmed by the simulated electric field distribution. To rationally coat oxides on CdS, the right candidates and their thicknesses have been considered by our tunneling model with trans- fer matrix method based on quantum mechanism, upon which the thickness of protective layer should be less than 0.5 nm to maintain a high tunneling probability, and thus one cycle of ALD TiO2 or AbO3 was proposed to passivate the CdS powder to balance the carrier transportation and corrosion suppres- sion. Based on HRTEM results, we found that the active V-shaped region was covered by ALD oxides （TiO2 or AbO3）. For each case, no soluble CdSO4 has been found before and after photocatalytic reactions based XPS measurements. Importantly, we noticed that with the passivation of one cycle of ALD, the catalyst＇s lifetime was elongated up to 〉14 times higher than that of the as-prepared CdS.

关键词： Cadmium sulfide PhotocatalysisPhoto-corrosion suppression Atomic layer deposition Quantum tunneling Transfer matrix method

中国金融机构时变关联性测度研究——来自频域视角的新证据

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系统工程理论与实践 2022年第8期42卷 2087-2101页

作者：欧阳资生周学伟谢楠湖南师范大学商学院长沙410081

金融机构关联是衡量系统性金融风险的重要指标,厘清金融关联在时域和频域的动态机制,有助于完善我国金融风险防范体系.本文运用时变广义动态因子模型,基于高维视角研究我国35家上市金融机构间的频域关联,并从低频关联和高频关联两方面,... 详细信息

金融机构关联是衡量系统性金融风险的重要指标,厘清金融关联在时域和频域的动态机制,有助于完善我国金融风险防范体系.本文运用时变广义动态因子模型,基于高维视角研究我国35家上市金融机构间的频域关联,并从低频关联和高频关联两方面,探讨了金融机构关联的周期特征.同时,借助相位谱分析方法,构建金融机构时变关联相位图,考察了金融机构关联的“同频共振”效应.研究发现:1)金融机构频域关联具有长周期特征,市场冲击会显著增强金融机构间的长周期关联.2)银行业关联具有顺周期性,证券业、保险业和多元金融业关联具有逆周期性.3)银行业、证券业和保险业存在同相关联,容易发生风险共振,而多元金融业存在异相关联,发生风险共振的可能性较小.

关键词：金融机构时变关联广义动态因子模型

Lumbar interbody fusion through muscle-space approach for lumbar degenerative disease

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Lumbar interbody fusion through muscle-space approach for lu...

2019楚天骨科高峰论坛暨第二十六届中国中西医结合骨伤科学术年会

作者： Bo Yang Ling Zhu Wei xie xuewei Gao Zhujiang Chen Hubei 672 orthopedic hospital of integrated Chinese and western medicine

Objective: To investigate the effect of lumbar interbody fusion in the treatment of lumbar degenerative diseases through bilateral muscular space443 *** and methods: A comparative study was conducted on 60 cases of single-level lumbar degenerative diseases in our hospital from September 2015 to December 2017. 29 patients underwent conventional surgical approach, and31 patients underwent bilateral muscle gap approach. We compare the two groups of patients in the operation time, intraoperative blood loss, intraoperative fluoroscopy exposure time, differences in postoperative drainage, differences in VAS score 1 week,3 months, 12 months postoperatively,lumbar function score(Japanese Orthopeadic Association Score and Oswestry Disability Index), The differences of fusion rate 3 months and 1 year after ***: 1,(1) The operative time in the muscle gap group was 108±29 min, The operative time of the traditional approach group was 90±33 min, mainly because we were not skilled in the muscle-space approach,(2) Intraoperative blood loss was 106±54 ml in the muscle gap group and 450±213 ml in the traditional approach group, showing significant differences between the two groups,(3) Postoperative drainage volume was 70±26 ml in the muscle gap group and 260±89 ml in the middle approach group,showing significant differences between the two groups.2. 1 week, 3 months and 12 months after the operation, the visual simulation pain scores of the waist and lower limbs were significantly lower in the muscle gap group than in the median approach group, and the differences were statistically significant.3. The lumbar function scores at 12 months postoperatively in the muscle gap group was significantly higher than that in the traditional approach group. 4. There was no significant difference in surgical segment fusion rate between the two groups 3 months and 1 year after ***: the decompression and fusion fixation in the muscle gap approach can reduce th

关键词： intermuscular space multiplex muscle lumbar degenerative disease

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卒中:回眸2021

中国卒中杂志 2022年第1期17卷 1-20页

作者：王拥军熊云云李子孝张玉梅杨晓萌王上霍晓川杨明谢雪微罗岗陈晓霖李光硕王利圆王传颖闫然王文洁段春苗路正钊首都医科大学附属北京天坛医院神经病学中心北京100070 国家神经系统疾病临床医学研究中心北京脑重大疾病研究院脑卒中研究所脑血管病转化医学北京市重点实验室北京脑科学与类脑研究中心首都医科大学附属北京天坛医院康复科首都医科大学附属北京天坛医院神经介入中心首都医科大学附属北京天坛医院神经外科

2021年,距离首项脑血管病循证医学研究——NASCET已经过去了30年[1]。与脑血管病的循证医学发展同步,2021年,Cerebrovascular Diseases杂志也已创刊30周年。杂志约请Hankey教授[2]回顾了30年间脑血管病循证医学的进程及最重要的研究进展... 详细信息

2021年,距离首项脑血管病循证医学研究——NASCET已经过去了30年[1]。与脑血管病的循证医学发展同步,2021年,Cerebrovascular Diseases杂志也已创刊30周年。杂志约请Hankey教授[2]回顾了30年间脑血管病循证医学的进程及最重要的研究进展:卒中单元的建立[3],加压弹力袜用于下肢静脉血栓的预防[4],1995年NINDS研究开启了缺血性卒中溶栓治疗的历程[5],1997年CAST和IST试验奠定了阿司匹林治疗的基石[6-7],2013年CHANCE研究证实短程、双联抗血小板治疗轻型缺血性卒中的有效性和安全性[8],2015年五大临床研究证明机械取栓(endovascular thrombectomy,EVT)的有效性[9-13],DEFUSE 3、DAWN及EXTEND试验扩展了EVT和静脉溶栓的时间窗[14-16].

关键词：卒中机械取栓静脉溶栓移动卒中单元二级预防无症状颈内动脉狭窄隐源性卒中卵圆孔未闭心房颤动抗血小板治疗迷走神经刺激

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胺及其衍生物的非酰基化动力学拆分

有机化学 2020年第3期40卷 575-588页

作者：唐亮李雪薇谢芳张万斌上海交通大学化学化工学院上海市手性药物分子工程重点实验室上海200240

光学纯胺在合成与药物化学领域都有着广泛的应用,发展其高效的合成方法一直以来是有机化学界的研究热点.其中通过N酰基化及去酰基化动力学拆分方法获得光学纯胺化合物,已经成为合成手性胺类化合物的重要方法.近年来,基于非酰基化(或去... 详细信息

光学纯胺在合成与药物化学领域都有着广泛的应用,发展其高效的合成方法一直以来是有机化学界的研究热点.其中通过N酰基化及去酰基化动力学拆分方法获得光学纯胺化合物,已经成为合成手性胺类化合物的重要方法.近年来,基于非酰基化(或去酰基化)的不对称反应实现外消旋胺的动力学拆分的报道不断涌现,包括一些氨基不参与反应的非酰基化(或去酰基化)不对称反应的外消旋胺的动力学拆分.根据氮原子是否参与反应以及反应类型的不同,总结了外消旋胺的化学催化动力学拆分的研究进展.

关键词：光学纯胺动力学拆分非酶催化非酰基化(去酰基化) 不对称催化反应

1178 J,527 nm near diffraction limited laser based on a complete closed-loop adaptive optics controlled off-axis multi-pass amplification laser system

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High Power Laser Science and Engineering 2021年第2期9卷 149-160页

作者： Deen Wang Xin Zhang Wanjun Dai Ying Yang xuewei Deng Lin Chen Xudong xie Dongxia Hu Feng Jing Zeping Yang Qiang Yuan Xiaofeng Wei Qihua Zhu Wanguo Zheng Xiaomin Zhang Lei Huang Key Laboratory of Photonic Control Technology(Tsinghua University) Ministry of EducationBeijing 100084China State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentTsinghua UniversityBeijing 100084China Research Center of Laser Fusion CAEPMianyang 621900China Institute of Optics and Electronics Chinese Academy of SciencesChengdu 610209China

A 1178 J near diffraction limited 527 nm laser is realized in a complete closed-loop adaptive optics(AO)controlled off-axis multi-pass amplification laser *** from a fiber laser and amplified by the pre-amplifier and the main amplifier,a 1053 nm laser beam with the energy of 1900 J is obtained and converted into a 527 nm laser beam by a KDP crystal with 62%conversion efficiency,1178 J and beam quality of 7.93 times the diffraction limit(DL).By using a complete closed-loop AO configuration,the static and dynamic wavefront distortions of the laser system are measured and *** correction,the diameter of the circle enclosing 80%energy is improved remarkably from 7.93DL to *** focal spot is highly concentrated and the 1178 J,527 nm near diffraction limited laser is achieved.

关键词： kilojoule near diffraction limit 527 nm X-ray

An R2R3 MYB transcription factor is critical for cold stress tolerance in apple

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An R2R3 MYB transcription factor is critical for cold stress...