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Ce-Mn/ZrO_(2)复合催化剂的制备及其固硫性能

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应用化学 2024年第6期41卷 839-850页

作者：陆志艳陈雯轩孙汪师诒卓宁泽魏潇廖丽芳许庆利吴诗勇华东理工大学资源与环境工程学院上海200237 上海环境卫生工程设计院有限公司上海200232

污泥焚烧过程中会产生SO_(2)污染环境,通过添加钙基固硫剂可将硫固定在灰渣里,但是固硫效果受高温抑制。针对上述问题,采用共沉淀法制备了Ce-Mn/ZrO_(2)复合催化剂,利用场发射扫描电子显微镜-能量色散X射线谱仪(FESEM-EDS)、透射电子显... 详细信息

污泥焚烧过程中会产生SO_(2)污染环境,通过添加钙基固硫剂可将硫固定在灰渣里,但是固硫效果受高温抑制。针对上述问题,采用共沉淀法制备了Ce-Mn/ZrO_(2)复合催化剂,利用场发射扫描电子显微镜-能量色散X射线谱仪(FESEM-EDS)、透射电子显微镜(TEM)、X射线粉末衍射仪(XRD)和X射线光电子能谱仪(XPS)表征催化剂的组成和形貌。将催化剂与污泥、钙基固硫剂混合,在自动测硫仪上进行高温固硫实验,研究其固硫催化性能,借助热重分析和燃烧动力学参数拟合计算探究其催化机理。实验结果表明,催化剂中活性组分Ce、Mn在载体中高度分散,Ce-Mn之间的协同作用可以为催化剂表面提供更多的氧空位,促进SO_(2)转变为SO_(3)。当n(Ca)/n(S)=1.5时,Ce-Mn/ZrO_(2)的质量分数为3.5%,燃烧温度为1000℃时,固硫率高达72.60%。Ce-Mn/ZrO_(2)可以降低污泥燃烧着火点和反应活化能,促进污泥燃烧,稳定固硫产物。该催化剂具有优异的催化活性,在污泥焚烧脱硫领域具有十分广阔的应用前景。

关键词：催化剂污泥焚烧热重分析动力学固硫机理

Loss Measurements on Polymer Thin Film Optical Waveguides

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Semiconductor Photonics and Technology 2000年第1期6卷 37-39页

作者： MAChang－bao MENGFan－qing 等 Dept.ofOptics ShandongUniversityJinan250100CHN InstituteofCrystalmaterials ShandongUniversityJinan

A simple setup for the measurement of transmission loss in polymer thin film optical waveguides is described. A new electro-optic polymer film has been prepared. The transmission loss of the film is measured before an... 详细信息

关键词： Loss measurement Optical waveguide Polymer thin film

The effects of the intertropical convergence zone on the easterly jet stream during Northern summer

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Acta Oceanologica Sinica 1989年第2期8卷 209-215页

作者： xu Liang bao Chenglan Guangdong Institute of Tropical Marine Meteorology, Guangzhou, China Marine Environmental Forecasting Centre of SOA, Beijing, China Guangdong Institute of Tropical Marine Meteorology Guangzhou China. China

In this paper, a strong 1TCZ process and an 1TCZ - absent process during FGGE in 1979 were selected for comparison to explore how they were subject to the influence of the evolution of the upper easterly jets.

关键词： In The effects of the intertropical convergence zone on the easterly jet stream during Northern summer ITCZ

Contribution of terahertz waves to near-field radiative heat transfer between graphene-based hyperbolic metamaterials

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Chinese Physics B 2018年第9期27卷 354-359页

作者： Qi-Mei Zhao Tong-Biao Wang De-Jian Zhang Wen-Xing Liu Tian-bao Yu qing-Hua Liao Nian-Hua Liu Department of Physics Nanchang UniversityNanchang 330031China Institute for Advanced Study Nanchang UniversityNanchang 330031China

Hyperbolic metamaterials alternately stacked by graphene and silicon（Si） are proposed and theoretically studied to investigate the contribution of terahertz（THz） waves to near-field radiative transfer. The results show that the heat transfer coefficient can be enhanced several times in a certain THz frequency range compared with that between graphene-covered Si bulks because of the presence of a continuum of hyperbolic modes. Moreover, the radiative heat transfer can also be enhanced remarkably for the proposed structure even in the whole THz range. The hyperbolic dispersion of the graphenebased hyperbolic metamaterial can be tuned by varying the chemical potential or the thickness of Si, with the tunability of optical conductivity and the chemical potential of graphene fixed. We also demonstrate that the radiative heat transfer can be actively controlled in the THz frequency range.

关键词： radiative heat transfer graphene hyperbolic metamaterials

Determination of Luzhou-flavor liquor ages by three-dimensional fluorescence spectroscopy combined with NMF

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Optoelectronics Letters 2018年第6期14卷 452-456页

作者： MA Chao-qun xu Rui-yu CHEN Guo-qing ZHU Zhuo-wei Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology School of Science Jiangnan University

The determination of Luzhou-flavor liquor ages is carried out by three-dimensional fluorescence spectroscopy combined with non-negative matrix factorization(NMF). 37 samples of aged liquors with weighted ages of 15, 20 and 25 years were prepared by blending three Luzhou-flavor original base liquors with storage ages of 10, 20 and 30 years in different proportions. The fluorescence spectra of the samples were measured, and then factorized into basis matrix and coefficients matrix by multiplicative iterative NMF. The fluorescence spectra, reconstructed from the basis matrix, are similar to the original spectra. The coefficients matrix is taken as the input of support vector machine(SVM) to establish a prediction model for the determination of liquor ages. Compared with the principal component analysis, the prediction model based on SVM has a predicted accuracy better than 91.7%. This method can provide helps for the market supervision on the aged liquors.

关键词： NMF three-dimensional fluorescence spectroscopy combined liquor ages

Impact of Low Frequency Electro-acupuncture on Glucose and Lipid Metabolism in Unmarried PCOS Women:A Randomized Controlled Trial

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Chinese Journal of Integrative Medicine 2021年第10期27卷 737-743页

作者： DONG Hao-xu WANG qing WANG Zhi WU Xiao-ke CHENG Ling ZHOU Zhong-ming YANG Li Yl Ping HUANG Dong-mei Institute of Integrated Traditional Chinese and Western Medicine Tongji HospitalHuazhong University of Science and TechnologyWuhan(430030)China Department of Traditional Chinese Medicine Tongji HospitalHuazhong University of Science and TechnologyWuhan(430030)China Department of Rehabilitation Center of Wuhan Puren Hospital Affiliated Hospital of Wuhan University of Science and TechnologyWuhan(430081)China Department of Obstetrics and Gynecology First Affiliated HospitalHeilongjiang University of Chinese MedicineHarbin(150040)China Department of Acupuncture and Moxibustion East HospitalTongji UniversityShanghai(200120)China Department of Obstetrics and Gynecology Hubei University of Traditional Chinese MedicineWuhan(430060)China

Objective:To explore the effect of electro-acupuncture(EA)on glucose and lipid metabolism in unmarried patients with polycystic ovary syndrome(PCOS).Methods:Fifty-four PCOS patients were equally randomized into true acupuncture group and sham acupuncture group(control)for totally 16 weeks of treatment by random method with a computerized randomization *** in true acupuncture group accepted traditional acupuncture methods with EA and two sets of acupoint groups were used *** first set consisted of Zhongji(CV 3),Qihai(CV 6),Guilai(ST 29),Sanyinjiao(SP 6),Yinlingquan(SP 9),Hegu(LI4)and Baihui(GV 20),and the second set consisted of Tianshu(ST 25),ST 29,CV 3,CV 6,SP 6,Taichong(LR 3),Neiguan(PC)6 and GV *** in the sham acupuncture group accepted shallow acupuncture methods through EA without electricity at 4 non-meridian points in each shoulder and upper *** measures included body mass index(BMI),waist-hip-ratio(WHR),oral glucose tolerance test(OGTT),insulin release test,glucose and lipid metabolism indicators such as total cholesterol(TC),triglycerides,high-density lipoprotein cholesterol(HDL-C),low-density lipoprotein cholesterol,adiponectin,leptin,visfatin,resistin,and interleukin(IL-6).Results:Twenty-six subjects in the true acupuncture group and 20 subjects in the sham group completed the clinical *** 16 weeks of treatment,no significant difference in the outcome measures were observed between the two groups(P>0.05).However,as compared with baseline data,a reduction in weight,BMI,hipline,WHR,fasting glucose,homeostatic model assessment of insulin sensitivity,visfatin and HDL-C,and an increase in resistin and IL-6 were observed in the true acupuncture group(P<0.05).In addition,a reduction in visfatin and an increase in TC were also observed in the sham group(P<0.05).Conclusions:Acupuncture may have a beneficial effect in the treatment of PCOS by improving glucose and lipid ***,the sham acupuncture may

关键词： electro-acupuncture glucose and lipid metabolism sham acupuncture visfatin polycystic ovary syndrome

Sensitivity of solar greenhouse envelopes to the thermal disfigurements and optimal selection of the thermal insulation quilt

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International Journal of Agricultural and Biological Engineering 2021年第5期14卷 50-55页

作者： Yachen Sun Yao Zhang Chenmeng Zhu Shaonan xu Bowen Liu Yanfei Cao Changji Zhou Yaqi Zhou Zhirong Zou Encai bao College of Architecture and Urban Planning Tongji UniversityShanghai 200092China Institute of Agricultural Facilities and Equipment Jiangsu Academy of Agricultural ScienceKey Laboratory of Protected Agriculture Engineering in the Middle and Lower Reaches of Yangtze RiverMinistry of Agriculture and Rural AffairsNanjing 210014China School of Engineering Anhui Agricultural UniversityHefei 230036China Department of Management City University of Hong KongTat Chee Avenue KowloonHong Kong 999077China qinghai College of animal husbandry and veterinary technology Xining 812100China School of Ocean and Earth Science Tongji UniversityShanghai 200092China Key Laboratory of Protected Horticultural Engineering in Northwest Ministry of Agriculture and Rural AffairsDepartment of HorticultureNorthwest A&F UniversityYangling 712100ShaanxiChina Academy of Agricultural Planning and Engineering Ministry of Agriculture and Rural AffairsBeijing 100125China School of Karst Science Guizhou Normal UniversityGuiyang 550001China

The objectives of the present work are focused on exploration of the reasons for temperature difference in different envelopes,the sensitivity of envelopes of solar greenhouse to thermal disfigurements and optimal selection of the thermal insulation *** analysis and derivation are conducted according to the experimental results of surface temperature,convective heat transfer,and heat flux density in different envelopes which with thermal disfigurements of solar greenhouse using heat transfer *** results revealed that the difference of intrinsic thermal conductivity and thickness of the envelopes leads to difference in the thermal flux and thus in the surface temperature of different *** with the front roof and back roof,the wall is more sensitive to thermal *** to the influence of thermal disfigurements on solar greenhouse temperature,the allowable thermal disfigurements area fraction of front roof and back roof are *** on the analysis of heat transfer theory and test results,the work given the expression of the thickness and thermal conductivity of thermal insulation quilt under different outdoor minimum temperatures for optimal selection of thermal insulation quilt based on comprehensive considering factors of the solar greenhouse structure,crop demand,outdoor minimum temperature,and insulation quilt *** results of this work give technical criterion for whether the envelopes with thermal disfigurements needs to be repaired or replaced,and it also provides theoretical and technical support for design the solar greenhouse as well as methodological guidance for the optimal selection of the thermal insulation quilt.

关键词： solar greenhouse thermal disfigurements optimal selection thermal insulation quilt

High-performance martensitic stainless steel nanocomposite powder for direct energy deposition prepared by ball milling

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Rare Metals 2023年第7期42卷 2419-2432页

作者： Zhen Wang Shu-Rong xu qing-xuan Sui Jiang Wang Bo Liu Hao Wen Tian-Yi Xiao Quan Yuan Feng-Jun Zhao Jun Liu School of Materials Science and Engineering Central South UniversityChangsha410083China Jinchuan Nickel Cobalt Research and Design Institute Jinchuan Group Co.LtdJinchang737100China

Direct energy deposition(DED)has great potential for the production of stainless steel matrix nanocomposite ***,the propensity of nanoparticle agglomeration leads to the difficulty in realizing homogenous dispersion of nanoparticles in the *** this study,a series of agglomeration-free nanoWC-Co-reinforced 420 stainless steel matrix nanocomposite powders with high flowability were prepared by ball milling under the optimal *** effect of ball milling time on the properties of the composite powders was *** powder properties ensure the DED processing ***,the corresponding composites were fabricated by DED,and the effects of nano-WC-Co content on the properties of the composites were comprehensively *** contact angles between the single pass cladding layer and the substrate change with increasing nano-WC-Co content(decrease from 127.38°to 113.07°).The different contact angles will significantly influence the quality of the multipass cladding ***,the addition of nanoWC-Co leads not only to further grain refinement but also to more pronounced isotropy of the micros *** the increase in nano-WC-Co content,the corrosion resistance is significantly improved(62.28%lower corrosion current for 420-15 wt%nano-WC-Co than for 420).

关键词： Steel matrix composites Direct energy deposition(DED) Ball milling time Contact angle Microstructure Mechanical property

脑卒中患者早期活动安全性及有效性的系统评价再评价

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中华现代护理杂志 2024年第9期30卷 1151-1158页

作者：戴雨婷王清吉康菱许桂玲张敏史慧玲南京大学医学院附属鼓楼医院神经内科南京210008 南京大学医学院附属鼓楼医院护理部南京210008 江苏大学鼓楼临床医学院南京210008

目的对脑卒中患者早期活动的安全性及有效性进行系统评价再评价。方法计算机检索中国知网、万方数据库、维普网、中国生物医学文献数据库、Cochrane Library、PubMed、Web of Science、CINAHL、Embase以及澳大利亚乔安娜布格里斯研究所... 详细信息

目的对脑卒中患者早期活动的安全性及有效性进行系统评价再评价。方法计算机检索中国知网、万方数据库、维普网、中国生物医学文献数据库、Cochrane Library、PubMed、Web of Science、CINAHL、Embase以及澳大利亚乔安娜布格里斯研究所循证卫生保健中心数据库有关脑卒中早期活动的系统评价, 检索时限为建库至2023年5月。由2名研究人员独立进行文献筛选、资料提取, 同时对纳入文献进行方法学质量评价, 并进行证据汇总和分级。结果共纳入10篇系统评价, 方法学质量评价结果显示, 1篇为中等质量文献, 2篇为低质量文献, 7篇为极低质量文献;证据质量评价结果显示, 高质量证据3条, 中等质量证据17条, 低质量证据21条, 极低质量证据17条。结论早期活动有利于改善脑卒中患者的日常生活活动能力和肢体运动功能, 降低并发症发生率, 缩短住院时间, 同时能在短期内提高患者的步行能力。但系统评价的证据质量均较低, 仍需进一步改进早期活动干预措施的研究设计, 为临床实践提供有力支撑。

关键词：卒中早期活动系统评价再评价循证护理学