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Precise Determination of Separation Between Spherical Attracting Masses in Measuring the Gravitational Constant

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Chinese Physics Letters 2001年第8期18卷 1012-1014页

作者： LUO Jun WANG Wen-Min hu zhong-kun WANG Xue-Li Department of Physics Huazhong University of Science and TechnologyWuhan 430074

A rotating gauge method is used to measure the span between two spheres with high precision in determination of the gravitational constant G.A rectangular gauge block slightly shorter than the span is located horizontally between two spheres,and the angle between two symmetric bounding points during rotation can be determined by measuring the shift of a laser beam passing through an optical plate fixed on the gauge *** results show that the uncertainty in the determination of the span between the two spheres is less than 0.5μm.

关键词： gauge spheres rotating

Determination of the Unperturbed Period of a Torsion Pendulum in the Time-of-Swing Method

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Chinese Physics Letters 1999年第12期16卷 867-869页

作者： LUO Jun hu zhong-kun LUO Xu-jun WU Zi-gang Department of Physics Huazhong University of Science and TechnologyWuhan 430074

A symmetric disc-shaped torsion pendulum was designed to study the nonlinear effects of the torsion fiber. It was showed that the period of the pendulum decreases with the amplitude of the oscillation. Determination of the unperturbed period through a fit to measured data of the period variation with amplitude shows that this systematic error in the measurement of Newtonian gravitational constant G by the time-of-swing method can be reduced by an order of the magnitude at least.

关键词： oscillation. torsion perturbed

Proposed Test of the Equivalence Principle with Rotating Cold Polar Molecules

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Chinese Physics Letters 2012年第8期29卷 29-32页

作者： hu zhong-kun KE Yi DENG Xiao-Bing ZHOU Ze-Bing LUO Jun Key Laboratory of Fundamental Physical Quantities Measurement of Ministry of Education School of PhysicsHuazhong University of Science and TechnologyWuhan 430074

We propose a novel scheme for testing the equivalence principle with rotating cold polar molecules whose angular momenta are polarized at different *** in specific rotational states are selected out via the hexapole state-selection technique and the gravitational acceleration g of molecules is measured by measuring the Doppler shift of the molecules free falling in the gravitational *** other possible methods of rotating molecules and measuring g are also ***,as the test masses,have higher rotating speed and smaller dimension in comparison with mechanical gyroscopes and may open a new way for testing the equivalence principle and the possible coupling between rotation and gravity.

关键词： field rotating testing

Tensor perturbations from bounce inflation scenario in f(Q)gravity

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Science China(Physics,Mechanics & Astronomy) 2024年第2期67卷 78-92页

作者： kun hu Tanmoy Paul Taotao Qiu Institute of Astrophysics Central China Normal UniversityWuhan 430079China School of Physics Huazhong University of Science and TechnologyWuhan 430074China National Institute of Technology Jamshedpur Department of PhysicsJamshedpur 831014India

In this paper,we construct a bounce inflation cosmological scenario in the framework of the modified symmetric teleparallel gravity,namely f(Q)theory,and investigate the tensor perturbations *** is well-known,the tensor perturbations generated in the very early Universe(inflation and pre-inflation regions)can account for the primordial gravitational waves(PGWs)that are to be detected by the next generation of GW *** discuss the stability condition of the tensor perturbations in the bounce inflation process and investigate in detail the evolution of the perturbation *** general form of the tensor power spectrum is obtained both for large as well as small scale *** a result,we show both kinds of modes(short or long wavelength modes),and the tensor spectrum may get a positive tilt in the parametric range where the tensor perturbation proves to be stable—this interestingly hints an enhancement of gravitational waves’amplitude in the background of the f(Q)bounce-inflation ***,we study the LQC-like scenario as a specific case of our model,in which,the primordial tensor power spectrum turns out to be nearly scale-invariant on both small and large scales.

关键词： bounce cosmology modified gravity cosmological perturbations

Study on the anti-inflammatory mechanism of moxibustion in rheumatoid arthritis in rats based on phospholipaseA2 signaling inhibition by Annexin 1

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Journal of Traditional Chinese Medicine 2024年第4期44卷 753-761页

作者： GUO Yanding LUO kun ZHANG Linlin LU Wenting SHANG Yanan zhong Yumei hu Danhui YANG Xin ZHOU Haiyan Department of Acupuncture-Moxibustion and Tuina the Third Affiliated HospitalChengdu University of Traditional Chinese MedicineChengdu 610075China External Treatment Center First People's Hospital of ChengduChengdu 610095China Department of Chengdu Integrated Traditional Chinese Medicine and Western Medicine Hospital Chengdu 610075China Department of Health Rehabilitation School Chengdu University of Traditional Chinese MedicineChengdu 610075China

OBJECTIVE:To determine whether moxibustion had an anti-inflammatory effect on rheumatoid arthritis(RA)by regulating Annexin 1 expression and interfering with the phospholipaseA2 signaling ***:Thirty male Sprague-Dawley rats were randomly categorized into five groups(six rats per group):blank control(CON)group,RA model(RA)group,moxibustion(MOX)group,Annexin 1 lentiviral intervention(RNAi-Anxa1)group,and Annexin 1 lentiviral intervention+moxibustion(RNAi-Anxa1+MOX)*** rats in the RNAi-Anxa1 and the RNAi-Anxa1+MOX groups were injected with the lentiviral vector-mediated RNAi-Anxa1 into the rat foot *** experimental RA rat model was established by injecting Freund's complete adjuvant(FCA)into the RA,MOX,RNAi-Anxa1,and RNAi-Anxa1+MOX *** in the MOX and RNAiAnxa1+MOX groups received moxibustion *** modeling,using moxibustion“Shenshu(BL23)”and“Zusanli(ST36)”,each point is 5 times,bilateral alternating,once a day,6 times for a course of treatment,between the courses of rest for a one day.A total of three treatment courses were *** bilateral pad thicknesses were measured using Vernier calipers on experimental days 1,7,14,21,and *** expression of cPLA2αsignaling in the synovium of diseased joints was observed using Western *** pathology of the rat ankle synovium was observed using hematoxylineosin(HE)***(IL)-1β,IL-10,prostaglandin E2(PGE2),and leukotriene B4(LTB4)were detected using enzyme-linked immunosorbent ***:Moxibustion increased the levels of Annexin 1 and decreased the inflammatory response in rats with *** increasing the expression of Annexin 1,the phosphorylated expression of cPLA2αwas inhibited,the serum levels of IL-1β,PGE2,and LTB4 decreased,and the level of IL-10 *** moxibustion treated RA rats after the Annexin 1 lentiviral intervention,the serum levels of IL-1β,PGE2,LTB4,and IL-10 were almost ***:Moxibustion enhanced the negative regulation of

关键词： annexins group IV phospholipases A2 signal transduction moxibustion arthritis,rheumatoid

Study on 6-DOF active vibration-isolation system of the ultra-precision turning lathe based on GA-BP-PID control for dynamic loads

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Advances in Manufacturing 2024年第1期12卷 33-60页

作者： Bo Wang zhong Jiang Pei-Da hu Department of Precision Instrument Tsinghua UniversityBeijing100084People’s Republic of China Institute of Machinery Manufacturing Technology China Academy of Engineering PhysicsMianyang621900SichuanPeople’s Republic of China

The vibration disturbance from an external environment affects the machining accuracy of ultra-precision machining *** active vibration-isolation systems(AVIS)have been developed based on static *** a vibration-isolation load changes dynamically during ultra-precision turning lathe machining,the system parameters change,and the efficiency of the active vibration-isolation system based on the traditional control strategy *** solve this problem,this paper proposes a vibration-isolation control strategy based on a genetic algorithm-back propagation neural network-PID control(GA-BP-PID),which can automatically adjust the control parameters according to the machining ***-isolation simulations and experiments based on passive vibration isolation,a PID algorithm,and the GA-BP-PID algorithm under dynamic load machining conditions were *** experimental results demonstrated that the active vibration-isolation control strategy designed in this study could effectively attenuate vibration disturbances in the external environment under dynamic load *** design is reasonable and feasible.

关键词： Ultra-precision diamond turning lathe Active vibration isolation Six degrees of freedom Dynamic load Genetic algorithm-back propagation neural network-PID(GA-BP-PID)control

Performance Analysis and Optimization of Energy Harvesting Modulation for Multi-User Integrated Data and Energy Transfer

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China Communications 2024年第1期21卷 148-162页

作者： Yizhe Zhao Yanliang Wu Jie hu kun Yang School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengdu 611731China

Integrated data and energy transfer(IDET)enables the electromagnetic waves to transmit wireless energy at the same time of data delivery for lowpower *** this paper,an energy harvesting modulation(EHM)assisted multi-user IDET system is studied,where all the received signals at the users are exploited for energy harvesting without the degradation of wireless data transfer(WDT)*** joint IDET performance is then analysed theoretically by conceiving a practical time-dependent wireless *** the aid of the AO based algorithm,the average effective data rate among users are maximized by ensuring the BER and the wireless energy transfer(WET)*** results validate and evaluate the IDET performance of the EHM assisted system,which also demonstrates that the optimal number of user clusters and IDET time slots should be allocated,in order to improve the WET and WDT performance.

关键词： energy harvesting modulation(EHM) integrated data and energy transfer(IDET) performance analysis wireless data transfer(WDT) wireless energy transfer(WET)

Moxibustion of Zusanli(ST36)and Shenshu(BL23)alleviates the inflammation of rheumatoid arthritis in rats through regulating macrophage migration inhibitory factor/glucocorticoids signaling

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Journal of Traditional Chinese Medicine 2024年第2期44卷 353-361页

作者： ZHANG Linlin zhong Yumei LU Wenting SHANG Yanan GUO Yanding LUO Xiaochao CHEN Yang LUO kun hu Danhui YU huiling ZHOU Haiyan Acupuncture and Moxibustion College Chengdu University of Traditional Chinese MedicineChengdu 610075China Department of Painology First People's Hospital of ChengduChengdu 610095China Chinese Evidence-Based Medicine Centre West China HospitalSichuan UniversityChengdu 610044China Traditional Chinese Medicine College Chongqing Medical UniversityChongqing 400016China External treatment center First People's Hospital of ChengduChengdu 610095China

OBJECTIVE:To test the hypothesis that moxibustion may inhibit rheumatoid arthritis(RA)synovial inflammation by regulating the expression of macrophage migration inhibitory factor(MIF)/glucocorticoids(GCs).METHODS:Fifty male Sprague-Dawley rats were randomly divided into five groups(n=10 each):blank Control(CON)group,RA Model(RA)group,Moxibustion(MOX)group,MIF inhibitor(S,R)-3-(4-hydroxyphenyl)-4,5-dihydro-5-isoxazole acetic acid methyl ester(ISO-1)group,and Moxibustion+MIF inhibitor ISO-1(MOX+ISO-1)*** in the ISO-1 group and ISO-1+MOX group were intraperitoneally injected with the inhibitor *** rats in the RA group,ISO-1 group,MOX group,and ISO-1+MOX group were injected with Freund's complete adjuvant(FCA)in the right hind footpad to establish an experimental RA rat *** the MOX group and MOX+ISO-1 group,rats were treated with *** thickness of the footpads of the rats in each group was measured at three-time points before,after modeling and after moxibustion *** contents of serum MIF,corticosterone(CORT),tumor necrosis factor-α(TNF-α)and interleukin-1β(IL-1β)were detected by enzyme-linked immunosorbent assay;and the contents of synovial MIF were detected by Western ***-eosin(HE)staining method was used to observe the pathological changes of synovial tissue under a section light microscope,and pathological scoring was performed according to the grading standard of the degree of synovial tissue ***:Moxibustion was found to reduce the level of MIF and alleviate inflammation in RA rats in this *** addition,after inhibiting the expression of MIF,the level of CORT increased,and the level of TNF-α *** RA rats with inhibited MIF by moxibustion,the level of CORT was almost unchanged,but the level of TNF-α further *** correlation analysis data suggested that MIF was positively related to the expression of TNF-α and negatively correlated with the expression of ***:Reducing MIF to

关键词： rheumatoid arthritis macrophage migration inhibitory factor moxibustion corticosterone glucocorticoids

Mg-doped,carbon-coated,and prelithiated SiO_(x) as anode materials with improved initial Coulombic efficiency for lithium-ion batteries

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Carbon Energy 2024年第3期6卷 204-214页

作者： Bin Liu Jie Liu Cheng zhong Wenbin hu Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education) School of Materials Science and EngineeringTianjin UniversityTianjinChina Tianjin Key Laboratory of Composite and Functional Materials School of Materials Science and EngineeringTianjin UniversityTianjinChina Joint School of National University of Singapore and Tianjin University TianjinChina International Campus of Tianjin University Binhai New CityFuzhouChina

Silicon suboxide(SiO_(x),x≈1)is promising in serving as an anode material for lithium-ion batteries with high capacity,but it has a low initial Coulombic efficiency(ICE)due to the irreversible formation of lithium silicates during the first *** this work,we modify SiO_(x) by solid-phase Mg doping reaction using low-cost Mg powder as a reducing *** show that Mg reduces SiO_(2) in SiO_(x) to Si and forms MgSiO_(3) or Mg_(2)SiO_(4).The MgSiO_(3) or Mg_(2)SiO_(4) are mainly distributed on the surface of SiO_(x),which suppresses the irreversible lithium-ion loss and enhances the ICE of SiO_(x).However,the formation of MgSiO_(3) or Mg_(2)SiO_(4) also sacrifices the capacity of SiO_(x).Therefore,by controlling the reaction process between Mg and SiO_(x),we can tune the phase composition,proportion,and morphology of the Mg-doped SiO_(x) and manipulate the *** obtain samples with a capacity of 1226 mAh g^(–1) and an ICE of 84.12%,which show significant improvement over carbon-coated SiO_(x) without Mg *** the synergistical modification of both Mg doping and prelithiation,the capacity of SiO_(x) is further increased to 1477 mAh g^(–1) with a minimal compromise in the ICE(83.77%).

关键词： initial Coulombic efficiency lithium-ion batteries magnesium doping prelithiation silicon suboxide