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多组分运动训练对老年肺结核衰弱患者炎症因子及氧化应激的影响

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湖南师范大学学报(医学版) 2024年第3期21卷 91-95+109页

作者：谭创吴传芳舒玲卢智赵红饶勤段磊长沙市中心医院/南华大学附属长沙中心医院结核病诊疗中心长沙市中心医院/南华大学附属长沙中心医院护理部长沙市中心医院/南华大学附属长沙中心医院耳鼻咽喉头颈外科长沙市中心医院/南华大学附属长沙中心医院康复医学科

目的：探讨多组分运动训练对老年肺结核衰弱患者炎症因子及氧化应激的影响。方法：采用便利抽样法选取2021年4月―10月长沙市某肺科医院的老年结核病患者，随机分为实验组(n=34)和对照组(n=32)，对照组予以常规结核病管理，饮食宣教、... 详细信息

目的：探讨多组分运动训练对老年肺结核衰弱患者炎症因子及氧化应激的影响。方法：采用便利抽样法选取2021年4月―10月长沙市某肺科医院的老年结核病患者，随机分为实验组(n=34)和对照组(n=32)，对照组予以常规结核病管理，饮食宣教、运动指导，实验组在常规结核病管理的基础上采用12周多组分运动管理方案。收集患者基线资料，比较干预前后两组患者衰弱状态、血清炎症因子、氧化应激因子水平。结果：干预12周后实验组体质量指数高于干预前，高于对照组，衰弱评分均低于干预前，低于对照组，血清IL-6、TNF-α、CRP、SOD表达水平均低于干预前，低于对照组。结论：多组分运动训练可有效降低炎症因子水平和减少氧化应激，从而改善老年结核患者衰弱状态。

关键词：肺结核衰弱多组分运动炎症氧化应激

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数字化场景下进出口商品检验监管研究

中国口岸科学技术 2024年第7期6卷 38-41页

作者：彭杰李许张伟亚梁澄波谭创新徐蓓蓓深圳海关工业品检测技术中心深圳518067 深圳海关后勤管理中心深圳518045

本文通过对进出口商品检验监管现状进行分析,探讨基于大数据和人工智能技术的商品检验监管智能化作业,研究大数据和人工智能技术在单证审核、现场检验鉴定、实验室检测等环节的应用特点,以及海关智能审单、智能商品检验鉴定方面的典型案... 详细信息

本文通过对进出口商品检验监管现状进行分析,探讨基于大数据和人工智能技术的商品检验监管智能化作业,研究大数据和人工智能技术在单证审核、现场检验鉴定、实验室检测等环节的应用特点,以及海关智能审单、智能商品检验鉴定方面的典型案例,提出助力“智慧商检”建设的可行性建议,为进一步提升海关监管效能提供参考。

关键词：商品检验大数据人工智能海关监管

Coupling Among CH Stretching, Bending and Rocking Vibrational Modes in CH2Cl2

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Chinese Journal of Chemical Physics 2006年第1期19卷 15-19页

作者： Qing-hua Liu Xiao-ning Li Lu-yuan Hao chuang tan Yin-gui Zhou Ping Chen Huai Zhu Department of Chemical Physics National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230025 Department of Basic Education for Information Anhui College of Tracfitional Chinese Medicine Hefei 230038 China

Infrared absorption spectra of gaseous CH2Cl2 in the regions of 1200-12000 cm^-1 were measured using a Bruker IFS 120HR Fourier transform spectrometer in conjunction with a nmltipass cell. 47 vibrational levels of overtone and combinational spectral lines of the CH stretching （v1, v6）, bending （v2）, and rocking （v8） modes were analyzed and assigned. Utilizing the normal mode model and considering the coupling among CH stretching, bending and rocking vibrations, values of the harmonic frequency wi, the anharmonic constant xij, and the coefficients of Fermi and the Darling-Dennison resonances of v1, v6, v2 and v8 modes were also determined from experimental spectral data with nonlinear least-square fitting. These spectral constants reproduced the experimental levels very well. These results showed that Fermi resonance between CH stretching and rocking vibrations （kiss=-254.63 cm^-1） is stronger than that between CH stretching and bending vibrations （k122 = 54.87 cm^-1 ）; and that Darling-Dennison resonances between CH stretching and bending vibrations （k166=-215.28 cm^-1） is also much stronger than that between CH bending and rocking vibrations （k2288=5.72 cm^-1）.

关键词： Normal model Darling-Dennison resonance Fermi resonance

Photoswitchable Spiropyridine Enabled Photoactuation of Polymeric Hydrogels under Physiological pH Conditions

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Chinese Journal of Polymer Science 2024年第10期42卷 1602-1609,I0015页

作者： Cong Liao Meng-Qi Du chuang Li Key Laboratory of Precision and Intelligent Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaAnhui230026China

The incorporation of molecular switches into polymer networks has been a powerful approach for the development of functional polymer materials that display macroscopic actuation and function enabled directly by molecular ***,such materials sometimes require harsh conditions to perform their functions,and the design of new molecular photoswitches that can function under physiological conditions is highly ***,we report the design and synthesis of a spiropyridine-based photoswitchable hydrogel that exhibits light-driven actuation at physiological *** to its high p Ka,spiropyridine maintains its ring-open protonated form at neutral pH,and the resulting hydrogel remains in a swollen *** irradiation with visible light,the ring closure of spiropyridine leads to a decrease in the charge and a reduction in the volume of the *** contracted gel could spontaneously recover to its expanding state in the dark,and this process is highly dynamic and reversible when the light is switched on and ***,the hydrogel shows switchable fluorescence in response to visible *** deformation is observed in the hydrogel thin films upon irradiation from one ***,the independence of this spiropyridine hydrogel from the acidic environment makes it biotolerant and shows excellent *** biocompatible spiropyridine hydrogel might have important biorelated applications in the future.

关键词： Spiropyridine photowitch Polymer hydrogel Photoactuation Physiological pH Biocompatibility

Noninvasive beam diagnosis based on the TM_(010)mode

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Nuclear Science and Techniques 2024年第7期35卷 115-125页

作者： chuang-Ye Song Wen-Hui Huang Department of Engineering Physics Tsinghua University BeijingBeijing100084China of Education Beijing100084China

A resonant cavity based on the TM_(010)mode is an effective tool for noninvasive beam characterization. This technique has the advantages of a high signal-to-noise ratio, compact structure, and is related to multiple parameters compared with other beam monitors. In this study, high-precision measurements of the bunch charge, arrival time, bunch length, and energy parameters based on the TM_(010)mode are discussed. A cavity beam arrival time monitor(BAM) utilizing a phase cavity has been widely used in many facilities. Regarding bunch-length measurements, the influence of the beam energy, beam offset,and longitudinal spectrum on the TM_(010)mode are carefully considered to reduce errors, and the theoretical resolution of two cavities with different frequencies is analyzed. Owing to the dependence of the beam velocity of the beam loss factor, this method can also be used for the detection low beam energy using two cavities with the same frequency but different cavity lengths. A set of three cavities with different lengths and frequencies of 1.902 and 11.424 GHz is presented for measuring the four aforementioned parameters.

关键词： TM_(010)mode Noninvasive diagnosis Beam length Low energy

基于Borda序值法的家用电器安全影响因子权重排序

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中国口岸科学技术 2024年第8期6卷 53-58页

作者：黄晓东张颖秦健谭创新陈华平马菁菁张朝文徐蓓蓓深圳海关工业品检测技术中心深圳518067 深圳海关后勤管理中心深圳518045

风险矩阵法因其简便易操作,在家用电器安全影响因子的权重评级中被广泛运用。然而,传统的风险矩阵法不够精准,常常在相同的权重级别中出现多个安全影响因子,即风险结,从而影响风险决策。本文以某家电产品24项安全影响因子权重分级为示范... 详细信息

风险矩阵法因其简便易操作,在家用电器安全影响因子的权重评级中被广泛运用。然而,传统的风险矩阵法不够精准,常常在相同的权重级别中出现多个安全影响因子,即风险结,从而影响风险决策。本文以某家电产品24项安全影响因子权重分级为示范,运用Borda序值法,对安全影响因子进行排序,使各权重级别内影响因子的权重大小关系更为清晰,可为制定精准高效的风险控制措施提供依据。

关键词：风险结风险矩阵 Borda序值法安全影响因子

Analytical computation of magnetic field in coil-dominated superconducting quadrupole magnets based on racetrack coils

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Nuclear Science and Techniques 2024年第4期35卷 119-135页

作者： chuang Shen Ying-Shun Zhu Fu-San Chen China Spallation Neutron Source Institute of High Energy PhysicsChinese Academy of Sciences1 Zhongziyuan RoadDongguan 523000China Institute of High Energy Physics Chinese Academy of Sciences19B Yuquan RoadBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Currently,three types of superconducting quadrupole magnets are used in particle accelerators:cos 2θ,CCT,and ***,all three coil configurations have complex spatial geometries,which make magnet manufacturing and strain-sensitive superconductor applications *** with the three existing quadrupole coils,the racetrack quadrupole coil has a simple shape and manufacturing process,but there have been few theoretical *** this paper,the two-dimensional and three-dimensional analytical expressions for the magnetic field in coil-dominated racetrack superconducting quadrupole magnets are *** analytical expressions of the field harmonics and gradient are fully resolved and depend only on the geometric parameters of the coil and current ***,a genetic algorithm is applied to obtain a solution for the coil geometry parameters with field harmonics on the order of 10^(-4).Finally,considering the practical engineering needs of the accelerator interaction region,electromagnetic design examples of racetrack quadrupole magnets with high gradients,large apertures,and small apertures are described,and the application prospects of racetrack quadrupole coils are analyzed.

关键词： Superconducting quadrupole magnet Racetrack coil Multipole field Genetic algorithm Magnetic design

Synthesis of chitosan-based grafting magnetic flocculants for flocculation of kaolin suspensions

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Journal of Environmental Sciences 2024年第5期139卷 193-205页

作者： chuang Liu Xiaoyu Wang Sicong Du Wenyan Liang Beijing Key Lab for Source Control Technology of Water Pollution/Engineering Research Center for Water Pollution Source Control&Eco-remediation/College of Environmental Science and Engineering Beijing Forestry UniversityBeijing 100083China

A series of novel chitosan-based magnetic flocculants FS@CTS-P(AM-DMC)was prepared by molecular structure *** characterization results showed that FS@CTS-P(AM-DMC)had a uniform size of about 21.46 nm,featuring a typical core-shell structure,and the average coating layer thickness of CTS-P(AM-DMC)was about 5.03 ***@CTS-P(AM-DMC)exhibited excellent flocculation performance for kaolin suspension,achieved 92.54% turbidity removal efficiency under dosage of 150 mg/L,pH 7.0,even at high turbidity(2000 NTU)with a removal efficiency of 96.96%.The flocculation mechanism was revealed to be dominated by charge neutralization under acidic and neutral conditions,while adsorption and bridging effects play an important role in alkaline *** properties of magnetic aggregates during flocculation,breakage,and regeneration were studied at different pH levels and *** the process of magnetophoretic,magnetic particles collide and adsorb with kaolin particles continuously due to magnetic and electrostatic attraction,transform into magnetic chain clusters,and then further form three-dimensional network magnetic aggregates that can capture free kaolin particles and other chain *** image velocimetry confirmed the formation of eddy current of magnetic flocs and experienced three stages:acceleration,stabilization,and deceleration.

关键词： Magnetic flocculation Chitosan Fe_(3)O_(4) Graft copolymerization PIV

Macro Meso Response and Stress Wave Propagation Characteristics of MCT High-Voltage Switch Under Shock load

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Defence Technology（防务技术） 2024年第2期32卷 317-335页

作者： Yuyang Guo chuang Chen Ruizhi Wang Enling tang Key Laboratory of Transient Physical Mechanics and Energy Conversion Materials of Liaoning Province Shenyang Ligong UniversityShenyang110159LiaoningChina

In order to study the dynamic and electrical coupling response characteristics of Metal Oxide Semiconductor Controlled Thyristor(MCT)high-voltage switch under the synergic action of mechanical load and high voltage,the separated Hopkinson pressure bar(SHPB)test system was used to simulate different impact load environments,and combined with the multi-layer high-voltage ceramic capacitor charging and discharging system,the instantaneous electrical signals of MCT high-voltage switch were *** with numerical simulation and theoretical analysis,the failure mode and stress wave propagation characteristics of MCT high voltage switch were *** mechanical and electrical coupling response characteristics and failure mechanism of MCT high voltage switch under dynamic load were revealed from macroscopic and microscopic *** results show that the damage modes of MCT high-voltage switches can be divided into non-functional damage,recoverable functional damage,non-recoverable damage and structural *** to the gap between the metal gate and the oxide layer,the insulating oxide layer was *** placing for a period of time,the elastic deformation of the metal gate partially recovered and the accumulated charge disappeared,which induced the recoverable functional damage failure of the *** addition,obvious cracks appeared on both sides of the monocrystalline silicon inside the MCT high-voltage switch,leading to unrecoverable damage of the device.

关键词： MCT Impact load Failure analysis Stress wave Numerical simulation