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Pricking and penetrating moxibustion therapy in patients with refractory insomnia: a randomized and controlled clinical trial

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Journal of Traditional Chinese Medicine 2018年第5期38卷 754-762页

作者： chen yan Gao Xiyan Sun Cuiying School of Rehabilitation Medicine Henan University of Chinese Medicine Acupuncture and Massage College Third Affiliated Hospital of Henan University of Chinese Medicine

OBJECTIVE: To observe the clinical effect of pricking and penetrating moxibustion therapy on refractory ***: Totally 60 subjects were randomly divided into treatment group and control group, 30 in each group. The treatment group was treated with pricking and penetrating moxibustion therapy, the control group with penetrating moxibustion therapy, the treatment was given once every day, two groups of patients were treated 20 times,compared the efficacy, pinsburgh sleep quality index(PSQI) and Traditional Chinese Medicine symptom, safety evaluation between the two ***: Compared with 10, 20 times after the treatment, the effective rate of the treatment group(93.3%) higher than that of the control group(80.0%)(P < 0.05); Compared with beforetreatment, 20 times after treatment, the PSQI and TCM symptom pattern scores of the two groups were significantly decreased(P < 0.01); Compared with 10, 20 times after the treatment, the treatment group are better than the control group in improving the total score and the integral of PSQI(P <0.05 or P < 0.01); The treatment group are better than the control group in improving the TCM symptom pattern score, difficulty in going to sleep, palpitation, amnesia, fidget, sweating, impaired concentration(P < 0.01 or P < 0.05).CONCLUSION: The pricking and penetrating moxibustion therapy is safe and effective in the treatment of refractory insomnia and the treatment can improve the curative effect of the therapy that uses penetrating moxibustion only.

关键词： Sleep initiation and maintenance disorders Pricking and penetrating moxibustion therapy Randomized controlled trail

Generalized Latin Matrix and Construction of Orthogonal Arrays

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Acta Mathematicae Applicatae Sinica 2017年第4期33卷 1083-1092页

作者： Shan-qi PANG Li-yan chen College of Mathematics and Information Science Henan Engineering Laboratory for Big Data Statistical Analysis and Optimal Control Henan Normal University Xinxiang 453007 China Anyang Preschool Education College Anyang 456150 China

In this paper, generalized Latin matrix and orthogonal generalized Latin matrices are proposed. By using the property of orthogonal array, some methods for checking orthogonal generalized Latin matrices are presented. We study the relation between orthogonal array and orthogonal generalized Latin matrices and obtain some useful theorems for their construction. An example is given to illustrate applications of main theorems and a new class of mixed orthogonal arrays are obtained.

关键词： orthogonal array generalized Latin matrix orthogonal generalized Latin matrices matrix image generalized permutation difference matrix

Approximations for modulus of gradients and their applications to neighborhood filters

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Frontiers of Mathematics in China 2013年第4期8卷 761-782页

作者： yan chen Zhuangji WANG Kewei ZHANG College of Resource and Environment China Agricultural University Beijing 100193 China Department of Agronomy Iowa State University Ames IA 50011USA School of Mathematical Sciences University of Nottingham University Park Nottingham NG7 2RD UK

We define an integral approximation for the modulus of the gradient ｜ u（x）｜ for functions f： Ω C Rn → R by modifying a classical result due to Calderon and Zygmund. Our integral approximations are more stable than the pointwise defined derivatives when applied to numerical differentiation for discrete data. We apply our results to design and analyse neighborhood filters. These filters correspond to well-behaved nonlinear heat equations with the conductivity decreasing with respect to the modulus of gradient ｜ u（x）｜. We also show some numerical experiments and evaluate the effectiveness of our filters.

关键词： BMO modulus of gradient harmonic analysis and PDE neighborhood filter image processing

Ground-State Properties of Superfluid Fermi Gas in Fourier-Synthesized Optical Lattices

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Chinese Physics Letters 2014年第3期31卷 5-9页

作者： chen yan ZHANG Ke-Zhi WANG Xiao-Liang chen Yong School of Physics and Electromechanical Engineering Hexi University Zhangye 734000 Center of Soft Matter Physics and its Applications Beihang University Beijing 100191 School of Physics and Nuclear Energy Engineering Beihang University Beijing 100191

By employing the balance condition between the lattice potential and the interatomic interaction, we study the ground state solutions of superfluid Fermi gases in Fourier-synthesized （FS） optical lattices. The average energy of the ground state, the atoms number, and the atom density distribution of the Fermi system are analytically derived along the Bose–Einstein condensation （BEC） side to the Bardeen–Cooper–Schrieffer （BCS） side. We analyze the properties of ground state solutions at both the BEC limit and unitarity in FS optical lattices. It is found that the relative phase α between the two lattice harmonics impacts greatly on the properties of the ground state of the superfluid Fermi gas. Especially in the BCS limit, when α=π/2, the average energy presents an exponential form with the increase of the potential depth of the lattice harmonics v2. Meanwhile, there exits a minimal value. Moreover, due to the Fermi pressure, the atom density distribution at unitarity is more outstretched than that in the BEC limit. The average energy at unitarity is apparently larger than that in the BEC limit. The properties of the ground state solution exhibit very different behaviors when the system transits from the BEC side to the BCS side.

关键词： Bose-Einstein condensation

How does the initial free volume distribution affect shear band formation in metallic glass?

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Science China(Physics,Mechanics & Astronomy) 2011年第8期54卷 1488-1494页

作者： chen yan JIANG MinQiang DAI LanHong State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing 100081 China

Introducing heterogeneities into the structure is an effective way to enhance the plasticity in metallic glasses (MGs). As natural heterogeneity, the original randomly distributed free volume in MGs has been found to be in favor of plasticity. However, the exact correlation between the free volume distribution and mechanical response is still unclear. In this paper, we investigate the shear banding in MGs with different structural disorders, characterized by both the free volume concentration (FVC) and the free volume dispersion (FVD). It is found that, either high FVC or wide FVD leads to low activation stress of shear band; wide FVD promotes the multiplication of shear bands but high FVC restricts it. It reveals that the yield strength in MGs is dependent on the amount of free volume while the plasticity mainly relies on the distribution. An optimum combination of the two aspects probably helps to design a MG of both good plasticity and high strength.

关键词： metallic glass free volume shear band yield strength

Implications for the supermassive black hole binaries from the NANOGrav 15-year data set

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Science China(Physics,Mechanics & Astronomy) 2023年第12期66卷 3-10页

作者： yan-chen Bi Yu-Mei Wu Zu-cheng chen Qing-Guo Huang CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUCASHangzhou 310024China Department of Astronomy Beijing Normal UniversityBeijing 100875China Advanced Institute of Natural Sciences Beijing Normal UniversityZhuhai 519087China Department of Physics and Synergistic Innovation Center for Quantum Effects and Applications Hunan Normal UniversityChangsha 410081China

Several pulsar timing array(PTA)collaborations,including NANOGrav,EPTA,PPTA,and CPTA,have announced the evidence for a stochastic signal consistent with a stochastic gravitational wave background(SGWB).Supermassive black hole binaries(SMBHBs)are supposed to be the most promising gravitational-wave(GW)sources for this *** this paper,we use the NANOGrav 15-year data set to constrain the parameter space in an astro-informed formation model for *** results prefer a large turn-over eccentricity of the SMBHB orbit when GWs begin to dominate the SMBHB ***,the SGWB spectrum is extrapolated to the space-borne GW detector frequency band by including inspiral-merge-cutoff phases of SMBHBs,indicating that the SGWB from SMBHBs should be detected by LISA,Taiji and Tian Qin in the near future.

关键词： supermassive black hole binary gravitational wave pulsar timing array

Rill flow velocity affected by the subsurface water flow depth of purple soil in Southwest China

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Journal of Mountain Science 2022年第3期19卷 704-714页

作者： TAO Ting-ting chen Shi-qi chen Xiao-yan College of Resources and Environment Southwest UniversityChongqing 400716China

Subsurface water flow above the weakly permeable soil layer commonly occurs on purple soil ***,it remains difficult to quantify the effect of subsurface water flow on the surface flow *** experiments were performed to measure the rill flow velocity on purple soil slopes containing a subsurface water flow layer with the electrolyte tracer method considering 3 subsurface water flow depths(SWFDs:5,10,and 15 cm),3 flow rates(FRs:2,4,and 8 L min^(-1)),and 4 slope gradients(SGs:5°,10°,15°,and 20°).As a result,the pulse boundary model fit the electrolyte transport processes very well under the different *** measured rill flow velocities were 0.202 to 0.610 m s^(-1) under the various *** regression results indicated a positive dependence of the flow velocity on the FR and SG but a negative dependence on the *** SWFD had notable effects on the rill flow *** the SWFD from 15 to 5 cm increased the flow ***,the flow velocities under the 10-and 15-cm SWFDs were 89%and 86%,respectively,of that under the 5-cm *** flow velocity under the 5-,10-and 15-cm SWFDs was decreased to 89%,80%,and 77%,respectively,of that on saturated soil *** results will enhance the understanding of rill flow hydrological processes under SWFD impact.

关键词： Rill erosion Subsurface water flow Electrolyte tracer method Flow velocity Purple soil

Rational design and structural regulation of near-infrared silver chalcogenide quantum dots

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Nano Research 2024年第12期17卷 10585-10606页

作者： Zhen-Ya Liu Wei Zhao Li-Ming chen yan-yan chen Zhi-Gang Wang An-An Liu Dai-Wen Pang College of Chemistry School of Medicine and Frontiers Science Center for Cell ResponsesFrontiers Science Centre for New Organic MatterTianjin Key Laboratory of Biosensing and Molecular RecognitionResearch Centre for Analytical SciencesNankai UniversityTianjin 300071China School of Chemical and Environmental Engineering Yancheng Teachers UniversityYancheng 224002China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

Silver chalcogenides(Ag_(2)E;E=S,Se,or Te)quantum dots(QDs)have emerged as promising candidates for near-infrared(NIR)***,their narrow bandgap and small exciton Bohr radius render the optical properties of Ag_(2)E QDs highly sensitive to surface and size ***,the propensity for the formation of silver impurities and their low solubility product constants pose challenges in their controllable *** advancements have deepened our understanding of the relationship between the multi-hierarchical structure of Ag_(2)E QDs and their optical *** rational design and precise structural regulation,the performance of Ag_(2)E QDs has been significantly enhanced across various *** review provides a comprehensive overview of historical and current progress in the synthesis and structural regulation of Ag_(2)E QDs,encompassing aspects such as size control,crystal structure engineering,and surface/interface ***,it discusses outstanding challenges and potential opportunities in this *** aim of this review is to promote the custom synthesis of Ag_(2)E QDs for applications in biological imaging,and optoelectronics applications.

关键词： silver chalcogenides structural regulation size control crystal engineering surface and interface regulation

Recent Advances in Hole Making of FRP/Metal Stacks:A Review

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Transactions of Nanjing University of Aeronautics and Astronautics 2019年第3期36卷 361-375页

作者： chen yan yanG Haojun XU Jiuhua FU Yucan yan Chaoren Jiangsu Key Laboratory of Precision and Micro-manufacturing Technology College of Mechanical and Electrical EngineeringNanjing University of Aeronautics and Astronautics

Weight reduction is a key driving force for materials development in aerospace industry,which leads to extensive usage of lightweight structural materials such as fiber reinforced polymer(FRP),titanium alloy,aluminum alloy,*** making is indispensable to assembling these lightweight components by riveted or bolted ***,hole making of FRP / metal stacks is always the most challenging task due to differences of material properties between FRP and metals.A comprehensive literature review on hole making of FRP/metal stacks in the last decade is given with a focus on four main aspects including drilling operation,drilling damages and machining parameter optimization,tool performance and wear,and developments in hole making ***,in order to ensure the precise and efficient hole making of FRP/metal stacks,an idea of low frequency vibration assisted drilling(LFVAD)FRP/metal stacks based on material removal characteristics is put forward by fully exploiting the unique advantages of LFVAD technology.

关键词： fiber reinforced polymer (FRP)/metal stacks drilling machining quality tool wear helical milling vibration assisted drilling abrasive water jet machining