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用偏光干涉法动态测量扭曲向列型液晶指向矢

光子学报 2016年第12期45卷 105-110页

作者：马靖裴丽燕许灿华周雄图福州大学物理与信息工程学院福州350108

提出一种基于双折射晶体劈的偏振态实时测量方法,并将该方法用于扭曲向列型液晶透射光的偏振态分析,实现了液晶分子平均指向矢的动态测量.利用基于晶体劈的偏光干涉法将待测光的偏振参量编码为两组干涉条纹,通过对干涉条纹定位实现偏振... 详细信息

提出一种基于双折射晶体劈的偏振态实时测量方法,并将该方法用于扭曲向列型液晶透射光的偏振态分析,实现了液晶分子平均指向矢的动态测量.利用基于晶体劈的偏光干涉法将待测光的偏振参量编码为两组干涉条纹,通过对干涉条纹定位实现偏振态的实时测量;再根据液晶指向矢的倾角、扭转角与透射光偏振态之间的关系,推算出液晶分子平均指向矢的动态信息.本实验测量液晶指向矢的速度为每秒5次,液晶平均指向矢的倾角、扭转角的测量准确度达到0.2°.本文研究为液晶分子平均指向矢的动态测量提供了一种有效途径.

关键词：物理光学动态测量偏光干涉法液晶指向矢双折射晶体劈

Coupling between Particle Shape and Long-Range Interaction in the High-Density Regime

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Chinese Physics Letters 2020年第8期37卷 63-67页

作者： can-can zhou Hongchuan Shen hua Tong Ning Xu Peng Tan State Key Laboratory of Surface Physics and Department of Physics Fudan UniversityShanghai 200433China School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China CAS Key Laboratory of Soft Matter Chemistry Hefei National Laboratory for Physical Sciences at the Microscaleand Department of PhysicsUniversity of Science and Technology of ChinaHefei 230026China Department of Fundamental Engineering Institute of Industrial ScienceUniversity of Tokyo4-6-1 KomabaMeguro-kuTokyo 153-8505Japan

We experimentally probe the coupling between particle shape and long-range interaction,using long-range interacting *** two typical space-filling polygons,square and triangle,we find two types of coupling modes that predominantly control the structure ***,the rotational ordering of squares brings a lattice deformation that produces a hexagonal-to-rhombic transition in the high density regime,whereas the alignment of triangles introduces a large geometric frustration that causes an order-to-disorder ***,the two coupling modes lead to small and large“internal roughness”of the two systems,and thus predominantly control their structure *** study thus provides a physical picture to the coupling between long-range interaction effect and short-range shape effect in the high-density regime unexplored before.

关键词： transition. coupling polygon

Theoretical calculation of high-pressure CO_(2)jet in cases of composite rock-breaking based on span-wagner equation of state

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Journal of Hydrodynamics 2022年第5期34卷 948-964页

作者： Xian-peng Yang can Cai Xiao-hua Chen Pei Zhang Xin Zeng Chi Peng Yingfang zhou Oil and Gas Equipment Technology Sharing and Service Platform of Sichuan Province School of Mechanical EngineeringSouthwest Petroleum UniversityChengdu610500China School of Engineering University of AberdeenAberdeenUK Laboratory of High-pressure Jet Theory and Application Technology Southwest Petroleum UniversityChengdu610599China Key Laboratory of Groundwater Resources and Environment Ministry of EducationJilin UniversityChangchun130021China Southwest Pipeline Co. Ltd.National Pipe Network GroupChengdu610064China

Although several theoretical calculation methods for high-pressure jet are available,there is currently no theoretical model for the high-pressure CO_(2)jet based on the high-precision equation of state(EOS).To investigate the flow field of the high-pressure CO_(2)jet in cases of the composite rock-breaking under the high-pressure CO_(2)Jet and PDC cutter,a semi-analytical approach of the high-pressure CO_(2)jet is developed based on the Span-Wagner EOS and CO_(2)jet *** semi-analytical calculations and the physical property calculations under the action of the high-pressure CO_(2)jet are conducted with consideration of the jet pressure,the jet distance,the nozzle diameter and the jet *** results indicate that the distribution of the physical properties calculated by the semi-analytical approaches is similar to that obtained by experimental monitoring and numerical simulation,which indicates that the calculation method of the high-pressure CO_(2)jet presented in this paper is effective and *** properties of the CO_(2)jet obtained by the theoretical calculation see a significant difference between the initial region and the jet impact *** the temperature of 300 K,the increase of the initial pressure can effectively increase the impact force and the cooling ability of the *** proportion of the jet core lengths in the jet on the axis increases with the increase of the ratio of the nozzle diameter to the jet length,accompanied with the increase of the impact force of the *** increase of the jet angle can effectively increase the impacting force of the jet,but hampers the fluid *** study combines the theoretical calculation of the jet with the calculation of the physical properties of the high-pressure CO_(2),for comprehensively understanding the CO_(2)jet field in the composite rock-breaking under the action of the high-pressure CO_(2)jet and PDC *** theoretical calculation of the CO_(2)jet based on the high-precisio

关键词： CO_(2)jet hydraulic jet drill theoretical calculation equation of state(EOS) physical property

Open-environment machine learning

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National Science Review 2022年第8期9卷 211-221页

作者： Zhi-hua zhou National Key Laboratory for Novel Software Technology Nanjing University

Conventional machine learning studies generally assume close-environment scenarios where important factors of the learning process hold invariant. With the great success of machine learning, nowadays, more and more practical tasks, particularly those involving open-environment scenarios where important factors are subject to change, called open-environment machine learning in this article, are present to the ***, it is a grand challenge for machine learning turning from close environment to open environment. It becomes even more challenging since, in various big data tasks, data are usually accumulated with time, like streams, while it is hard to train the machine learning model after collecting all data as in conventional studies. This article briefly introduces some advances in this line of research,focusing on techniques concerning emerging new classes, decremental/incremental features, changing data distributions and varied learning objectives, and discusses some theoretical issues.

关键词： machine learning artificial intelligence open-environment machine learning open ML

Pharmacological targeting cGAS/STING/NF-κB axis by tryptanthrin induces microglia polarization toward M2 phenotype and promotes functional recovery in a mouse model of spinal cord injury

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Neural Regeneration Research 2025年第11期20卷 3287-3301页

作者： Ziwei Fan Mengxian Jia Jian zhou zhoule Zhu Yumin Wu Xiaowu Lin Yiming Qian Jiashu Lian Xin hua Jianhong Dong Zheyu Fang Yuqing Liu Sibing Chen Xiumin Xue Juanqing Yue Minyu Zhu Ying Wang Zhihui huang Honglin Teng Department of Orthopedics(Spine Surgery) the First Affiliated Hospital of Wenzhou Medical UniversityWenzhouZhejiang ProvinceChina School of Pharmacy Hangzhou Normal UniversityHangzhouZhejiang ProvinceChina Department of Neurology The First Affiliated Hospital of Wenzhou Medical UniversityWenzhouZhejiang ProvinceChina Department of Pathology Affiliated Hangzhou First People’s HospitalSchool of MedicineWestlake UniversityHangzhouZhejiang ProvinceChina Department of Clinical Research Center Affiliated Hangzhou First People’s HospitalSchool of MedicineWestlake UniversityHangzhouZhejiang ProvinceChina

The M1/M2 phenotypic shift of microglia after spinal cord injury plays an important role in the regulation of neuroinflammation during the secondary injury phase of spinal cord *** of shifting microglia polarization from M1(neurotoxic and proinflammatory type)to M2(neuroprotective and anti-inflammatory type)after spinal cord injury appears to be *** possesses an anti-inflammatory biological ***,its roles and the underlying molecular mechanisms in spinal cord injury remain *** this study,we found that tryptanthrin inhibited microglia-derived inflammation by promoting polarization to the M2 phenotype in *** promoted M2 polarization through inactivating the cGAS/STING/NF-κB ***,we found that targeting the cGAS/STING/NF-κB pathway with tryptanthrin shifted microglia from the M1 to M2 phenotype after spinal cord injury,inhibited neuronal loss,and promoted tissue repair and functional recovery in a mouse model of spinal cord ***,using a conditional co-culture system,we found that microglia treated with tryptanthrin suppressed endoplasmic reticulum stress-related neuronal *** together,these results suggest that by targeting the cGAS/STING/NF-κB axis,tryptanthrin attenuates microglia-derived neuroinflammation and promotes functional recovery after spinal cord injury through shifting microglia polarization to the M2 phenotype.

关键词： cGAS/STING functional recovery microglia neuroinflammation neuroprotection nuclear factor-κB polarization spinal cord injury tryptanthrin

3D printing of architectured graphene-based aerogels by cross-linking GO inks with adjustable viscoelasticity for energy storage devices

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Rare Metals 2023年第3期42卷 971-981页

作者： San-can Han Jia-Le Quan Fu-Guo zhou Yu-hua Xue Na Li Feng-Yu Li Ding Wang School of Materials Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China

Three-dimensional(3D)functional graphenebased architecture with superior electrical conductivity and good mechanical strength has promising applications in energy storage and ***-adjustable inks make it possible to achieve desired 3D architectures with interconnected and continuous interior networks by microextrusion *** this work,ultra-low-concentration graphene oxide(GO)inks of~15 mg·ml-1 have been obtained and demonstrated in direct 3D printing with a facile cross-linking(direct ink writing).The rheological behavior of the GO strategy by cations,which is the lowest concentration to achieve direct ink writing inks,could be adjusted from 1×10^(4) to 1×10^(5) Pa·s^(-1) with different concentrations of cations due to strong cross-linking networks between GO sheets and ***,the specific strength and electrical conductivity of 3D-printed graphene architecture are notably enhanced,reaching up to 51.7×10^(3) N·m·kg^(-1)and 119 S·m^(-1),which are superior to conventional graphene ***,3D printing graphene-based architecture assembled in micro-superc apacitor exhibits excellent electrochemical performance,which can be ascribed to the effective ion transportation through the interconnected *** strategy demonstrated is useful in the design of complex-shaped,graphene-based architectures for scalable manufacturing of practical energy storage applications.

关键词： Three-dimensional(3D)printing Graphene oxide(GO)inks Cross-linking strategy Graphene-based architecture

Why over-parameterization of deep neural networks does not overfit?

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Science China(Information Sciences) 2021年第1期64卷 242-244页

作者： Zhi-hua zhou National Key Laboratory for Novel Software Technology Nanjing University

Deep neural networks often come with a huge number of parameters,even larger than the number of training examples,but it seems that these over-parameterized models have not suffered from *** is quite strange and why over-parameterization does not overfit?poses a fundamental question concerning the mysteries behind the success of deep neural networks.

关键词： Information Systems and Communication Service

A new approach for identification of medicinal almonds by fourier transform infrared spectroscopy and systematic clustering of characteristic peaks

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Chinese Journal of Natural Medicines 2017年第9期15卷 703-709页

作者： CHENG Chun-Song WANG can-Jian LIANG Jie LAO Chi-Chou zhou hua ZHANG Zhi-Feng State Key Laboratory of Quality Research in Chinese Medicine (Macao University of Science and Technology) Macao 999078China Faculty of Chinese Medicine Macao University of Science and Technology Macao 999078 China Macao Institute for Applied Research in Medicine and Health Macao 999078 China

Medicinal almonds have been used for over 2 000 years and its clinical efficacy includes relieving cough and asthma. The domestic market in China is flooded with different kinds of dried almonds, such as bitter almond(Armeniacae Semen Amarum, AAS),sweet almond(Armeniacae Semen Dulce, ADS), salted almond(Armeniacae Semen Salsa, ASS), and their sulfur-fumigating products(Armeniacae Semen Sulphur Fumabat, ASFS). Wide varieties of almonds may lead to uncertain efficacy, aberrant quality, and even increased safety risk. However, the authentication method for medicinal almonds has not been reported, although imposters may lead to ineffective medical response. In the present study, Fourier transform infrared spectroscopy(FTIR) and the 2-dimensional infrared(2 D-IR) spectroscopy were used to identify different almonds, which were extracted with different solvents including water, methanol, ethanol, chloroform and ethyl acetate, respectively. A new simple FTIR method was developed in the present study. According to the gradient solvent polarity, a new 2 D IR method was first developed, and the commodities of almonds in China were analyzed by using the FTIR spectroscopy supported by hierarchical clustering of characteristic peaks. Moreover, 5-hydroxymethyl-2-furfural could be used as a detection index and control target in the quality control of medicinal almonds.

关键词： FTIR Almonds Xingren Sulfur-fumigation

Wet synthesis endows scalable epitaxy of complex oxide multiferroics

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National Science Review 2020年第7期7卷 1147-1148页

作者： hua zhou X-ray Science Division Advanced Photon SourceArgonne National Laboratory

Synthesis is the bridge linking scientific fantasies to practical realizations, to push the boundaries of materials exploration with societally impactful applications. As one of the most promising classes of materials with direct technological implications, complex oxides exhibit an amazing collection of electronic, chemical,ionic and topological properties, making them strategic candidates for a variety of electronic, energy and environ-

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