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消泡剂的研究进展及其消泡机理

化学工程师 2024年第9期38卷 67-70页

作者：王小荣王丹秋文龙马旭芳咸阳师范学院化学与化工学院陕西咸阳712000

本文以工业过程中常用的消泡方法为例,介绍了物理消泡和化学消泡两种操作方法及优缺点,并重点介绍了聚醚型、有机硅型、非硅型和硅醚混合型4种不同类型消泡剂的应用效果,并对消泡剂的消泡机理进行了分析。

关键词：消泡剂化学消泡法消泡剂类型消泡机理

Effects of edge hydrogenation and Si doping on spin-dependent electronic transport properties of armchair boron–phosphorous nanoribbons

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Chinese Physics B 2018年第10期27卷 635-641页

作者： Hong Zhao Dan-Dan Peng Jun He Xin-Mei Li Meng-qiu long Hunan Key Laboratory of Super Micro-structure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha 410083China Institute of Low-dimensional Quantum Materials and Devices School of Physical Science and TechnologyXinfiang UniversityUrumqi 830046China

In this article, the spin-dependent electronic and transport properties of the armchair boron–phosphorous nanoribbons（ABPNRs） are mainly studied by using the non-equilibrium Green function method combined with the spin-polarized density function theory. Our calculated electronic structures indicate that the edge hydrogenated ABPNRs exhibit a ferromagnetic bipolar magnetic semiconductor property, and that the Si atom doping can make ABPNRs convert into up-spin dominated half metal. The spin-resolved transport property results show that the doped devices can realize 100% spinfiltering function, and that the interesting negative differential resistance phenomenon can be observed. Our calculations suggest that the ABPNRs can be constructed as a spin heterojunction by introducing Si doping partially, and it would be used as a spin-diode for nano-spintronics in future.

关键词： armchair boron-phosphorous nanoribbon Si doping bipolar magnetic semiconductor property negative differential resistance

Ocular surface heat effects on ocular hemodynamics detected by real-time measuring device

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International Journal of Ophthalmology(English edition) 2018年第12期11卷 1902-1908页

作者： Ting-Ting Li Guang-Bin Shao Yu-long Jiang Jing-Xuan Wang Xin-Rong Zhou Min Ren long-qiu Li Department of Ophthalmology Shanghai General Hospital Shanghai Jiao Tong University School of Medicine (originally named "Shanghai First People's Hospital")Shanghai 200080 China Shanghai Key Laboratory of Ocular Fundus Diseases Shanghai 200080China Shanghai Engineering Center for Visual Science and Photomedicine Shanghai 200080China Department of Ophthalmology the Second Affiliated Hospital of Harbin Medical UniversityHarbin 150000Heilongjiang ProvinceChina Key Laboratory of Micro-systems and Microstructures Manufacturing of Ministry of Education Harbin Institute of TechnologyHarbin 150001Heilongjiang ProvinceChina Department of Ultrasound Shanghai First Maternity and Infant HospitalTongji University School of Medicine Shanghai 201204China

AIM: To investigate the ocular hemodynamic effects of applying a hot compress to the ***: The right eyes of five New Zealand white rabbits, both male and female, were hot-compressed for 18 min. An independently designed novel ocular contacttype temperature measuring device was used to measure the ocular surface temperature before and after the heating. Relevant retrobulbar hemodynamic parameters such as peak systolic velocity(PSV), end diastolic velocity(EDV), and resistance index(RI) of each of the central retinal artery(CRA), long posterior ciliary artery(LPCA), and ophthalmic artery(OA), as well as the mean velocity(V_m) of the central retinal vein(CRV), were measured using a color Doppler flow imaging(CDFI) technique and expressed as mean values with standard deviation(mean±SD). A statistical analysis was conducted based on a paired t-test and the Wilcoxon signed-rank test. RESULTS: The employed real-time temperature measuring device was able to accurately measure ocular surface temperature during the hot-compress process. The temperature increased after the hot compress was applied. Analysis showed that the PSV and EDV values of the CRA and LPCA significantly increased after the application of the hot compress, as did the V_m of the CRV. There were no significant changes in the EDV of the OA nor the RI of each artery. CONCLUSION: This experiment, which is the first of its kind, confirms that the retrobulbar blood flow velocities can increase upon heating the ocular surface. This simple method may be useful in the future.

关键词： ocular hemodynamics ocular surface heating temperature detection device color Doppler flow imaging

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岭南火针疗法治疗皮脂腺囊肿40例

中国针灸 2024年第10期44卷 1146-1148页

作者：曾婧纯邱龙卢立宏罗洋陈广贤佘雅琳王澍欣林国华广州中医药大学第一附属医院针推康复中心广东广州510405 广东省中医临床研究院广州510405 广州中医药大学第一临床医学院广州医科大学附属中医医院针灸科

目的:观察岭南火针疗法治疗皮脂腺囊肿的临床疗效。方法:纳入皮脂腺囊肿患者40例,采用岭南火针疗法治疗,于阿是穴(皮脂腺囊肿中心)行点刺,共治疗1次。观察患者治疗前及治疗后4周(随访)改进皮脂腺囊肿评分表评分,并评定临床疗效。结果:... 详细信息

目的:观察岭南火针疗法治疗皮脂腺囊肿的临床疗效。方法:纳入皮脂腺囊肿患者40例,采用岭南火针疗法治疗,于阿是穴(皮脂腺囊肿中心)行点刺,共治疗1次。观察患者治疗前及治疗后4周(随访)改进皮脂腺囊肿评分表评分,并评定临床疗效。结果:随访时,患者改进皮脂腺囊肿评分表评分较治疗前降低(P<0.001),总有效率为97.5%(39/40)。结论:岭南火针疗法可改善皮脂腺囊肿患者的临床症状。

关键词：皮脂腺囊肿岭南火针针刺改进皮脂腺囊肿评分表

The Emergence of Functional Ultrasound for Noninvasive Brain-Computer Interface

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Research 2024年第2期6卷 301-317页

作者： Hairong Zheng Lili Niu Weibao qiu Dong Liang Xiaojing long Guanglin Li Zhiyuan Liu long Meng Institute of Biomedical and Health Engineering Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055China Shenzhen Institute of Advanced Integration Technology Chinese Academy of Sciences and The Chinese University of Hong KongShenzhen518055China

A noninvasive brain-computer interface is a central task in the comprehensive analysis and understanding of the brain and is an important challenge in international brain-science *** implanted brain-computer interfaces are cranial and invasive,which considerably limits their *** development of new noninvasive reading and writing technologies will advance substantial innovations and breakthroughs in the field of brain-computer ***,we review the theory and development of the ultrasound brain functional imaging and its ***,we introduce latest advancements in ultrasound brain modulation and its applications in rodents,primates,and human;its mechanism and closed-loop ultrasound neuromodulation based on electroencephalograph are also ***,high-frequency acoustic noninvasive brain-computer interface is prospected based on ultrasound super-resolution imaging and acoustic tweezers.

关键词： breakthrough computer Computer

Algorithms and statistical analysis for linear structured weighted total least squares problem

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Geodesy and Geodynamics 2024年第2期15卷 177-188页

作者： Jian Xie Tianwei qiu Cui Zhou Dongfang Lin Sichun long School of Earth Science and Spatial Information Engineering Hunan University of Science and TechnologyXiangtan 411201China College of Science Central South University of Forestry and TechnologyChangsha 410018China National-Local Joint Engineering Laboratory of Geo-spatial Information Technology Hunan University of Science and TechnologyXiangtan 411201China

Weighted total least squares(WTLS)have been regarded as the standard tool for the errors-in-variables(EIV)model in which all the elements in the observation vector and the coefficient matrix are contaminated with random ***,in many geodetic applications,some elements are error-free and some random observations appear repeatedly in different positions in the augmented coefficient *** is called the linear structured EIV(LSEIV)*** kinds of methods are proposed for the LSEIV model from functional and stochastic *** the one hand,the functional part of the LSEIV model is modified into the errors-in-observations(EIO)*** the other hand,the stochastic model is modified by applying the Moore-Penrose inverse of the cofactor *** algorithms are derived through the Lagrange multipliers method and linear *** estimation principles and iterative formula of the parameters are proven to be *** first-order approximate variance-covariance matrix(VCM)of the parameters is also derived.A numerical example is given to compare the performances of our proposed three algorithms with the STLS ***,the least squares(LS),total least squares(TLS)and linear structured weighted total least squares(LSWTLS)solutions are compared and the accuracy evaluation formula is proven to be feasible and ***,the LSWTLS is applied to the field of deformation analysis,which yields a better result than the traditional LS and TLS estimations.

关键词： Linear structured weighted total least squares Errors-in-variables Errors-in-observations Functional modelmodification Stochastic model modification Accuracyevaluation

Local heat transfer enhancement induced by a piezoelectric fan in a channel with axial flow

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2020年第12期21卷 1008-1022页

作者： Yun-long qiu Chang-ju WU Wei-fang CHEN School of Aeronautics and Astronautics Zhejiang UniversityHangzhou 310027China

The present work experimentally and numerically investigates the local heat transfer enhancement induced by a piezoelectric fan interacting with a cross flow in a local heated *** piezoelectric fan is placed along the flow direction and tested under different amplitudes and flow *** the simulations,a spring-based smoothing method and a local remeshing technique are used to handle the moving boundary *** mesh is used to reduce the size of dynamic mesh domain and to improve computational *** experimental and numerical values of the time-averaged mean Nusselt number are found to be in good agreement,with deviations of less than 10%.The experimental result shows that the heat transfer performance of the heated surfaces is substantially enhanced with a vibrating piezoelectric *** numerical result shows that the heat transfer enhancement comes from the strong longitudinal vortex pairs generated by the piezoelectric fan,which significantly promote heat exchange between the main flow and the near-wall *** the case of a=0.66(a is the dimensionless amplitude)and Re=1820,the enhancement ratio of the time-averaged mean Nusselt number reaches 119.9%.

关键词： Piezoelectric fan Local heat transfer enhancement Forced convection longitudinal vortex Pressure drop

深圳市4个典型分布区咬齿牡蛎的生物学·生理生化和品质特征

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安徽农业科学 2024年第12期52卷 93-95页

作者：周文川卢洁赵秋龙姚托付胜利叶灵通深圳市渔业发展研究中心广东深圳518067 中国水产科学研究院南海水产研究所/广东省渔业生态环境重点实验室/农业农村部水产品加工重点实验室广东广州510300

[目的]探明深圳市4个典型分布区咬齿牡蛎(Saccostrea mordax)的生物学特性、生理生化指标和营养成分,比较不同地区牡蛎的差异,为资源保护和利用提供科学依据。[方法]选择深圳市大鹏湾、东山湾、柚柑湾和西冲口4个区域采集野生咬齿牡蛎,... 详细信息

[目的]探明深圳市4个典型分布区咬齿牡蛎(Saccostrea mordax)的生物学特性、生理生化指标和营养成分,比较不同地区牡蛎的差异,为资源保护和利用提供科学依据。[方法]选择深圳市大鹏湾、东山湾、柚柑湾和西冲口4个区域采集野生咬齿牡蛎,测定其壳长、壳高、壳宽等形态学指标,检测抗氧化酶、免疫酶等生理指标,分析脂肪酸、蛋白质等营养成分。[结果]4个区域牡蛎在壳型和多个生理指标上存在显著差异。东山湾牡蛎壳型较细长,抗氧化能力和酸性磷酸酶活性较高;柚柑湾牡蛎溶菌酶活性最强,脂肪酸和糖原含量最丰富。[结论]地区环境条件是导致牡蛎差异的决定性因素,东山湾和柚柑湾牡蛎处于较高环境压力下,形成了较强的生理适应性。

关键词：咬齿牡蛎生物学特性生理指标营养成分

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星天牛成虫复眼外部形态和内部超微结构

环境昆虫学报 2024年第3期46卷 773-780页

作者：文超何金雨种海南邱华龙温秀军王偲温俊宝肖海军北京林业大学草业与草原学院北京100083 华南农业大学林学与风景园林学院广州510642 北京林业大学林木有害生物防治北京市重点实验室北京100083 广东省森林培育与保护利用重点实验室/广东省林业科学研究院广州510520

星天牛Anoplophora chinensis能够取食上百种植物,以幼虫蛀干危害为主。本研究使用扫描电镜、透射电子显微镜和光学显微镜研究了星天牛成虫复眼外部形态和内部超微结构。结果表明星天牛复眼着生于触角基部,为不规则的肾形,表面光滑,由12... 详细信息

星天牛Anoplophora chinensis能够取食上百种植物,以幼虫蛀干危害为主。本研究使用扫描电镜、透射电子显微镜和光学显微镜研究了星天牛成虫复眼外部形态和内部超微结构。结果表明星天牛复眼着生于触角基部,为不规则的肾形,表面光滑,由1211~1270个小眼组成,大部分小眼呈六边形,少数位于复眼边缘的小眼为不规则的五边形,小眼间角为6.90~9.56°。每个小眼由角膜、晶锥、视网膜细胞和基膜组成。角膜厚度为84.03±3.82μm,晶锥被初级色素细胞包围,色素颗粒直径为0.41~0.97μm。每个小眼包括8个视网膜细胞,其中6个周缘细胞(R1~R6)包围2个中央细胞(R7~R8),视网膜细胞的感杆小体在向心侧形成半融合的感杆束,次级色素细胞色素颗粒将相邻小眼的视网膜细胞隔离,色素颗粒直径为0.41~1.06μm。星天牛成虫复眼为并列像型,复眼分辨率较低,但视觉角度广,能够感受强度较低的光照。

关键词：星天牛复眼视网膜细胞视觉