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平面光学元件超平整吸附装载的优化设计与分析

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机械工程学报 2024年第5期60卷 241-248页

作者：赵承伟张文豪龚天诚张逸云王长涛罗先刚中国科学院光场调控科学技术全国重点实验室成都610209 中国科学院光电技术研究所微细加工光学技术国家重点实验室成都610209 中国科学院大学北京100049

在平面光学元件加工和应用中,采用真空吸附方式进行装载,具有快速、稳定的优势,而真空吸附对平面光学元件的面形影响不可忽视。基于有限元分析方法,针对功能窗口限制、倒立装载等特殊需求,对真空吸盘气道进行优化设计,并通过实验对真空... 详细信息

在平面光学元件加工和应用中,采用真空吸附方式进行装载,具有快速、稳定的优势,而真空吸附对平面光学元件的面形影响不可忽视。基于有限元分析方法,针对功能窗口限制、倒立装载等特殊需求,对真空吸盘气道进行优化设计,并通过实验对真空吸盘的实际效果进行分析。实验结果表明,在吸盘不锁紧状态下吸附,平面光学元件在中心Ф10 mm、Ф20 mm和Ф40 mm范围内,面形PV分别为1.2 nm、5.1 nm和20.8 nm。在此基础上,论文进一步分析了装载平台平整度、吸盘装载方式和吸盘锁紧力对吸附结果的影响,结果表明:平面光学元件吸面型随着装载平台平整度的提升而提升;装载平台平整度2μm条件下,采用四螺钉、2.5 N·m扭矩进行边沿固定,吸附效果达到最好,在中心Ф10 mm、Ф20 mm和Ф40 mm范围内,面形PV平均值分别为7.8 nm、27.7 nm和114.2 nm,装载重复性标准差为0.93 nm、3.2 nm和10.6 nm。

关键词：真空吸附气道优化有限元分析面形测量扭矩控制

低碱条件下糊精与钙离子协同作用对闪锌矿与黄铁矿浮选分离的影响

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中南大学学报（自然科学版） 2024年第7期55卷 2447-2455页

作者：刘润清翟启林文晓飞王长涛陈攀孙伟唐鸿鹄中南大学资源加工与生物工程学院湖南长沙410083 四川大学材料科学与工程学院四川成都610065

闪锌矿与黄铁矿的浮选分离大多在高碱条件下进行,但这会导致药剂用量大、设备腐蚀严重等问题,为此,采用清洁高效的有机抑制剂糊精作为黄铁矿的抑制剂,通过矿物表面润湿性检测、吸附量测试以及红外光谱检测阐明糊精与矿物之间的作用机理... 详细信息

闪锌矿与黄铁矿的浮选分离大多在高碱条件下进行,但这会导致药剂用量大、设备腐蚀严重等问题,为此,采用清洁高效的有机抑制剂糊精作为黄铁矿的抑制剂,通过矿物表面润湿性检测、吸附量测试以及红外光谱检测阐明糊精与矿物之间的作用机理,并利用浮选溶液化学理论分析钙离子、糊精与黄铁矿三者之间的吸附方式。研究结果表明:在弱碱性条件下,糊精单独作用时,对黄铁矿的抑制效果不佳,但加入钙离子后,糊精对黄铁矿的抑制作用显著增强;在弱碱性条件下,钙离子会以Ca(OH)^(+)的形式强烈地吸附在黄铁矿表面,同时,Ca(OH)^(+)与糊精之间也具有很强的吸附力,促进糊精在黄铁矿表面的吸附,从而加强了糊精对黄铁矿的抑制,实现闪锌矿与黄铁矿的浮选分离。

关键词：闪锌矿黄铁矿糊精钙离子浮选分离

Fast and accurate adaptive collocation iteration method for orbit dynamic problems

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中国航空学报:英文版 2023年第9期36卷 231-242页

作者： Honghua DAI Zhe ZHANG Xuechuan wang Haoyang FENG changtao wang Xiaokui YUE National Key Laboratory of Aerospace Flight Dynamics(AFDL) Northwestern Polytechnical UniversityXi’an 710072China School of Astronautics Northwestern Polytechnical UniversityXi’an 710072China

For over half a century,numerical integration methods based on finite difference,such as the Runge-Kutta method and the Euler method,have been popular and widely used for solving orbit dynamic *** general,a small integration step size is always required to suppress the increase of the accumulated computation error,which leads to a relatively slow computation ***,a collocation iteration method,approximating the solutions of orbit dynamic problems iteratively,has been *** method achieves high computation accuracy with extremely large step *** efficient,the collocation iteration method suffers from two limitations:(A)the computational error limit of the approximate solution is not clear;(B)extensive trials and errors are always required in tuning *** overcome these problems,the influence mechanism of how the dynamic problems and parameters affect the error limit of the collocation iteration method is *** this basis,a parameter adjustment method known as the“polishing method”is proposed to improve the computation *** method proposed is demonstrated in three typical orbit dynamic problems in aerospace engineering:a low Earth orbit propagation problem,a Molniya orbit propagation problem,and a geostationary orbit propagation *** simulations show that the proposed polishing method is faster and more accurate than the finite-difference-based method and the most advanced collocation iteration method.

关键词： Collocation iteration method Numerical integration method Orbit dynamics Parameter adjustment method Polishing method

基于数据库可视化分析发酵源化妆品的应用与发展

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日用化学工业（中英文） 2024年第4期54卷 439-448页

作者：华中杰茅文瑄狄飞倩张佳婵王昌涛北京工商大学轻工科学与工程学院北京100048

近五年随着消费者对“天然、绿色、安全”化妆品的关注度日益提高,发酵源化妆品的开发得到了长足发展。对于发酵源化妆品原料的开发,中外研究人员从不同角度入手,提高了相关发酵产物的活性、产量以及有效成分的含量。文章基于中国知网(C... 详细信息

近五年随着消费者对“天然、绿色、安全”化妆品的关注度日益提高,发酵源化妆品的开发得到了长足发展。对于发酵源化妆品原料的开发,中外研究人员从不同角度入手,提高了相关发酵产物的活性、产量以及有效成分的含量。文章基于中国知网(CNKI)数据库以及Web of Science核心数据库,借助文献计量方法和知识图谱可视化软件VOSviewer,以“化妆品”、“发酵”、“cosmetic”、“fermentation”或“fermented”为关键词构建近五年发酵源化妆品文献库,根据可视化分析知识图谱中的关键词共现频率分析近期发酵源化妆品领域的研究热点,并对目前化妆品相关的发酵菌种、发酵产物及功效宣称进行了汇总分析,同时对未来发酵源化妆品的发展与研发提出展望,为发酵源化妆品领域研究提供理论基础。

关键词：发酵源化妆品发酵菌种发酵产物 VOSviewer 可视化分析

Using pectin to separate talc and molybdenite through the surface modification with Cu^(2+):Applications and mechanism

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International Journal of Mining Science and Technology 2023年第3期33卷 363-377页

作者： changtao wang Qilin Zhai Runqing Liu Meirong Wu Wei Sun Nianwen Jing Feifei Xie School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China

Organic depressants have low selectivity in separating molybdenite and talc because their metal sites lack activity for organics *** this study,surface modification by copper sulfate was used to induce the differential adsorption of pectin onto molybdenite and talc surfaces for enhanced flotation ***-angle experiments,scanning electron microscopy,adsorption measurements,timeof-flight secondary-ion mass spectrometry,and X-ray photoelectron spectroscopy analyses were conducted to reveal the interaction *** illustrated that molybdenite and talc could not be separated using pectin alone,while molybdenite was selectively depressed after surface modification by copper sulfate and this effect was strengthened under alkaline *** sites(Mg,Si and Mo)of talc and molybdenite themselves were unable to react with pectin,whereas Cu+would deposit and further function as active site for pectin chemisorption after surface ***,the quantity of deposited Cu sites dropped on talc surface and increased on molybdenite surface with increased pH,and the Mo atoms of molybdenite crystal were activated to take part in pectin ***,more pectin was adhered on molybdenite surface,which imparted molybdenite stronger ***,surface-modification through metal ions can enable the differential adsorption of organic depressants and enhance the flotation separation of minerals.

关键词： Molybdenite Talc Surface modification Induced adsorption

化妆品使用植物功效成分抑制痤疮的研究及相关专利分析

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中华中医药杂志 2024年第1期39卷 336-341页

作者：李璐瑶程文静狄飞倩张佳婵王昌涛安全石秀芹北京工商大学北京植物资源研究开发重点实验室北京100048 云南白药股份有限公司昆明650000

痤疮是一种慢性炎症性皮肤表现,其影响因素复杂多样。《已使用化妆品原料目录(2021年版)》规定了祛痘植物原料在化妆品领域的可使用范围。基于此,笔者从痤疮发生机制入手,详细阐述痤疮相关生物学变化;在调研文献资料的基础上,对未收录... 详细信息

痤疮是一种慢性炎症性皮肤表现,其影响因素复杂多样。《已使用化妆品原料目录(2021年版)》规定了祛痘植物原料在化妆品领域的可使用范围。基于此,笔者从痤疮发生机制入手,详细阐述痤疮相关生物学变化;在调研文献资料的基础上,对未收录其中的10种祛痘功效植物成分的作用机制进行了更新和综述;最后,对2002年至2022年已授权祛痘相关专利进行分析,探索祛痘产品的研究现状和发展趋势,为祛痘类产品的研发提供新思路。

关键词：痤疮痤疮发生机制植物活性成分化妆品 SOOPAT专利分析

Gut microbial-host-isozymes are new targets for diseases

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Science China(Life Sciences) 2024年第7期67卷 1525-1527页

作者： Zhiwei Zhang Kai wang changtao Jiang Department of Physiology and Pathophysiology School of Basic Medical SciencesState Key Laboratory of Female Fertility PromotionCenter for Reproductive MedicinePeking UniversityBeijing 100191China Center for Obesity and Metabolic Disease Research School of Basic Medical SciencesState Key Laboratory of Vascular Homeostasis and RemodelingPeking UniversityBeijing 100191China

Gut microbiota can interact with the host through lots of media including small molecular metabolites and proteins(Cani,2019;Fan and Pedersen,2021;Krautkramer et al.,2021).Recently,a new interaction pattern was identified,i.e.,gut microbiota can mimic the function of the host by producing a variety of enzymes with functions homologous to host enzymes.

关键词： diseases pattern

Progress in gut microbiota-host interaction

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Science China(Life Sciences) 2024年第5期67卷 851-853页

作者： changtao Jiang Department of Immunology School of Basic Medical SciencesNHC Key Laboratory of Medical ImmunologyPeking UniversityBeijing 100191China

Recently,the gut microbiota has been recognized as a novel endocrine organ in the human *** produces various bioactive metabolites and participates in metabolic *** addition,the gut microbiota is involved in the metab... 详细信息

关键词： metabolism drugs processes

Plasmonic lithography with 100nm overlay accuracy

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光电工程 2017年第2期44卷 209-215页

作者： Minggang Liu Chengwei Zhao changtao wang Xiangang Luo State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and ElectronicsChinese Academy of Sciences

In this paper,we demonstrate an auto accurate alignment method to align mask-substrate in the prototype of plasmonic lithography(PL),which is essential for multilayer nanostructure fabrication with high resolution,low cost,high efficiency,and high throughput,such as circuit manufacturing and other *** obtained an alignment signal with sensitivity better than 20 nm by using the Moiréfringe ***,only using the Moiréfringes cannot guarantee the alignment of the mask and the substrate because the Moiréfringe repeats itself when the mask and substrate are offset by a fixed *** eliminate the ambiguity,boxes and the crosses alignment marks are designed beside the grating marks on the substrate and the mask,respectively.A two-step alignment scheme including coarse alignment and fine alignment is explored in the auto alignment *** the stage of coarse alignment,the edge detection algorithm based on Canny operator is adopted to detect the edges image *** the process of fine alignment,Fourier transform based on Moiréfringe image is obtained to improve the alignment *** addition,experimental results of overlay indicate that PL can obtain sub-100 nm alignment accuracy over an area of 1 cm^2 using the proposed two-step alignment *** the substrate-mask mismatch compensation,better stages and precise environment control,it is expected that much higher overlay accuracy is feasible.

关键词： Moiré fringe surface plasmonic lithography alignment