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阴极铜表面质量缺陷把控关键性技术实践

有色金属（冶炼部分） 2024年第2期 28-34页

作者：周楠江西铜业股份有限公司贵溪冶炼厂江西贵溪335424

阴极铜质量的稳定关系到企业品牌形象的稳固和产量任务的顺利完成。获得板面平整、结晶致密、化学成分合格、物理外观良好的阴极铜一直是贵溪冶炼厂电解车间提升工艺技术水平的重点工作。通过对阴极铜表面质量影响因素的综合分析,深入... 详细信息

阴极铜质量的稳定关系到企业品牌形象的稳固和产量任务的顺利完成。获得板面平整、结晶致密、化学成分合格、物理外观良好的阴极铜一直是贵溪冶炼厂电解车间提升工艺技术水平的重点工作。通过对阴极铜表面质量影响因素的综合分析,深入追踪阴极铜电解生产环节中由物料指标控制、循环系统生产环境、产品输出洗涤质量所带来的一系列不足之处,从中总结归纳出阴极铜表面质量缺陷把控关键性技术措施,为阴极铜电解生产质量的提高做出进一步的保障。

关键词：阴极铜表面质量电解工艺生产实践

IgA肾病肠道黏膜免疫致病机制的再认识:肠源性IgA^(+)浆细胞

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中华实用儿科临床杂志 2024年第3期39卷 232-235页

作者：周楠刘曼首都医科大学附属北京儿童医院保定医院(保定市儿童医院)肾脏内科保定071051 保定市儿童医院儿童肾脏基础与临床重点实验室保定071051 国家儿童医学中心首都医科大学附属北京儿童医院肾内科北京100045 儿童慢性肾脏病及血液净化北京市重点实验室北京100045 儿科重大疾病研究教育部重点实验室北京100045

肠源性IgA^(+)浆细胞是肠道黏膜免疫发挥免疫效应的关键。肠源性IgA^(+)浆细胞的产生受肠道菌群和饮食调控,不仅在肠道黏膜局部发挥免疫作用,还可迁徙至肠道外的组织或器官,通过依赖产生IgA抗体或分泌细胞因子等非抗体产生效应来调节免... 详细信息

肠源性IgA^(+)浆细胞是肠道黏膜免疫发挥免疫效应的关键。肠源性IgA^(+)浆细胞的产生受肠道菌群和饮食调控,不仅在肠道黏膜局部发挥免疫作用,还可迁徙至肠道外的组织或器官,通过依赖产生IgA抗体或分泌细胞因子等非抗体产生效应来调节免疫和炎症反应,在多种疾病中发挥免疫调节的保护或者致病效应。肠道黏膜免疫失衡在IgA肾病中的致病效应逐渐被关注。IgA肾病高血清IgA小鼠肠道固有层IgA^(+)浆细胞的增多与循环中异常糖基化IgA1增多有关。IgA肾病患者循环中的长寿命浆细胞数量增加,并抑制白细胞介素-6发挥致病作用。但肠源性IgA^(+)浆细胞是否迁移至肾脏局部促进疾病进展尚不清楚。现就肠源性IgA^(+)浆细胞在IgA肾病肠道黏膜免疫致病效应及机制的相关研究进展进行综述。

关键词： IgA肾病黏膜免疫抗体分泌细胞免疫球蛋白A 浆细胞

Thyroid Hormone Biomonitoring:A Review on Their Metabolism and Machine-Learning Based Analysis on Effects of Endocrine Disrupting Chemicals

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Environment & Health 2024年第6期2卷 350-372页

作者： Shijie Chen Mengjie Yu Yiming Yao Yongcheng Li Ana He Zijun zhou Liyang Pan nan Xiao Haining Luo Hongwen Sun MOE Key Laboratory of Pollution Processes and Environmental Criteria College of Environmental Science and EngineeringNankai UniversityTianjin 300071China Tianjin Tianshi College Tianjin 301700China Dalian Center for Disease Control and Prevention DalianLiaoning Province 116000China Department of Center for Reproductive Medicine Tianjin Central Hospital Of Gynecology Obstetrics/Tianjin Key Laboratory Of Human Development And Reproductive RegulationTianjin 300052China

The thyroid is an essential endocrine organ in human body,and thyroid hormones(THs)are pivotal signaling molecules and mediators in various physiological ***,particularly in their free form,play a critical role in regulating body temperature and in the metabolism of lipid and glucose,making the maintenance of TH levels crucial for human *** undergo a series of metabolic processes,producing TH metabolites(THMs).THMs are significant in endocrine regulation,such as 3,5-diiothyronine(3,5-T2)and 3-iodothyronamine(3-T1AM),which exhibit activities akin to *** production and distribution of THMs are intricately linked to the function of specific organs and tissues,highlighting the need for advanced research into the determination and mechanisms of THMs in *** to endocrine disrupting chemicals(EDCs)can significantly affect the levels of thyroid stimulating hormone(TSH)and *** review utilizes machine learning to analyze epidemiological data,identifying potential EDCs that pose risks of hyperthyroidism and ***,it delves into the toxicological mechanisms of these EDCs,examining their effects on TH production,binding processes,related proteins,and metabolic *** approach effectively bridges the gap between epidemiological studies and toxicological researches,laying the groundwork for future research *** integrating epidemiological studies with machine learning,this review offers insightful perspectives on the potential risks associated with chemical exposure and underscores the necessity for further research in understanding the impact of EDCs on TH metabolism and TH-related health effects.

关键词： Thyroid stimulating hormone Emerging contaminants Data mining Thyroxine 3,3′,5-Triiodothyronine Homeostasis

Shear strength degradation of gas hydrate-bearing sediment due to partial hydrate dissociation

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第7期16卷 2749-2763页

作者： Yuan zhou Jiazuo zhou Pan Chen Changfu Wei State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China University of Chinese Academy of Sciences Beijing100049China China University of Geosciences Wuhan430074China

Extraction of methane hydrate from subseafloor reservoir may potentially trigger seabed slides and induce *** address the problems,it is crucial to properly characterize the phase equilibrium condition of pore hydrate and the shear strength of the *** one of the key constitutive components,the phase equilibrium condition enforces a constraint over pore gas pressure,temperature and unhydrated water *** a constraint,however,has been traditionally ignored in analyzing the mechanical behavior of hydrate-bearing *** this paper,a series of stepwise hydrate dissociation tests was performed,and the phase equilibrium condition of pore hydrate was determined,providing an effective way to evaluate the unhydrated water content during hydrate ***,a series of direct shear tests was also conducted to explore the shear strength characteristics of the *** is shown that the shear strength of the hydrate-bearing soil can be significantly influenced by pore gas pressure,unhydrated water content,hydrate saturation and several other *** particular,the measured shear strength depends upon the initial water content of the sample,pointing to a potential problem that the shear strength could be wrongly determined if not properly interpreted.A shear strength criterion,which enforces the equilibrium condition of pore hydrate,is developed for hydrate-bearing soil,establishing a link between the equilibrium condition and the shear *** proposed equation describes well the shear strength characteristics of hydrate-bearing soils,remarkably unifying the effects of pore pressure,temperature,water content and hydrate saturation.

关键词： Hydrate-bearing soil Phase equilibrium condition Shear strength Unhydrated water content Mechanical behavior

An automatic Q-factor matching method for eliminating 77%of the ZRO of a MEMS vibratory gyroscope in rate mode

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Microsystems & nanoengineering 2024年第3期10卷 35-48页

作者： Jingbo Ren Tong zhou Yi zhou Yixuan Li Yan Su School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing 210000China

Mismatching quality factors(Q-factors)is one of the main factors causing zero-rate output(ZRO)in degenerate(DE)Micro-Electro-Mechanical Systems(MEMS)vibratory *** eliminate the ZRO of the DE MEMS gyroscope,this study introduces a method for real-time identification and automatic matching of Q-factors in rate *** leveraging the vibration characteristics of the DE MEMS vibratory gyroscope in rate mode,dedicated online test methods are designed to determine the Q-factors for both the drive and sense modes,enabling online identification of the Q-factor ***,an automatic Q-factor matching system is designed utilizing the mechanical-thermal dissipation mechanism of the resistive *** effectiveness of this proposed method is validated through simulations and experiments conducted on a MEMS disk resonator gyroscope(DRG).The results show a measurement error within 4%for Q-factor identification,and automatic Q-factor matching effectively reduces the ZRO by 77%.Employing this automatic Q-factor matching method successfully reduces the ZRO that is caused by the mismatching of Q-factors in the MEMS DRG from 0.11°/s to 0.025°/s and improves the bias instability(BI)from 0.40°/s to 0.19°/s.

关键词： matching mode method

Quantitative characterization of fusion state of virgin and aged asphalt using nano-ferrous ferric oxide tracer

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Journal of Traffic and Transportation Engineering(English Edition) 2024年第3期11卷 467-480页

作者： Qiang Li Song Liu Huameng Wen zhou zhou College of Civil Engineering Nanjing Forestry UniversityNanjing 210037China School of Transportation Southeast UniversityNanjing 211189China

The exact evaluation of the fusion rate of virgin and aged asphalt is essential to optimize the performance of the recycled asphalt *** fusion rate index was developed by tracing the distribution of tracer asphalt,which contains nano-ferrous ferric oxide(nano-Fe_(3)O_(4))*** fusion simulation tests were performed on three types of asphalt to obtain different fusion states,and fatigue tests were performed to evaluate the influence of the fusion rate on the fatigue life of the recycled *** was found that the tracer asphalt containing 4%nano-Fe_(3)O_(4)shows the optimal trace effect,and the developed fusion rate index can quantitatively characterize the influence of different factors on the fusion state of the recycled *** fusion state is closely related to the fatigue performance of recycled asphalt,and the fusion rate index can fairly evaluate its fatigue *** relationship between the fusion rate and the fatigue life of recycled asphalt depends on the factors that cause the fusion rate *** the influence of the amount of rejuvenator,the fatigue life of recycled asphalt grows exponentially with increasing fusion rate due to enhancement of molecular motion as well as a supplement of lightweight *** the influence of heat preservation treatment,fatigue life increases linearly with increasing fusion *** proposed fusion rate index can be utilized to quantitatively characterize the fusion state of virgin and aged asphalt,thus providing a simple way to guide the practical application of recycled asphalt.

关键词： Recycled asphalt Rejuvenator Tracing technique Fusion rate Fatigue

Energy-information trade-off induces continuous and discontinuous phase transitions in lateral predictive coding

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Science China(Physics,Mechanics & Astronomy) 2024年第6期67卷 79-85页

作者： Zhen-Ye Huang Ruyi zhou Miao Huang Hai-Jun zhou Key Laboratory for Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China School of Optics and Photonics Beijing Institute of TechnologyBeijing 100081China Minjiang Collaborative Center for Theoretical Physics Minjiang UniversityFuzhou 350108China

Lateral predictive coding is a recurrent neural network that creates energy-efficient internal representations by exploiting statistical regularity in sensory ***,we analytically investigate the trade-off between information robustness and energy in a linear model of lateral predictive coding and numerically minimize a free energy *** observed several phase transitions in the synaptic weight matrix,particularly a continuous transition that breaks reciprocity and permutation symmetry and builds cyclic dominance and a discontinuous transition with the associated sudden emergence of tight balance between excitatory and inhibitory *** optimal network follows an ideal gas law over an extended temperature range and saturates the efficiency upper bound of energy *** results provide theoretical insights into the emergence and evolution of complex internal models in predictive processing systems.

关键词： predictive coding recurrent neural network phase transition internal model free energy

General properties of the spectral form factor in open quantum systems

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Frontiers of physics 2024年第3期19卷 229-237页

作者： Yi-Neng zhou Tian-Gang zhou Pengfei Zhang Institute for Advanced Study Tsinghua UniversityBeijing 100084China Department of Physics Fudan UniversityShanghai 200438China

The spectral form factor(SFF)can probe the eigenvalue statistic at different energy scales as its time variable *** closed quantum chaotic systems,the SFF exhibits a universal dip-ramp-plateau behavior,which reflects the spectrum rigidity of the *** this work,we explore the general properties of SFF in open quantum *** find that in open systems the SFF first decays exponentially,followed by a linear increase at some intermediate time scale,and finally decreases to a saturated plateau *** derive general relations between(i)the early-time decay exponent and Lindblad operators;(ii)the long-time plateau value and the number of steady *** also explain the effective field theory perspective of general *** verify our theoretical predictions by numerically simulating the Sachdev−Ye−Kitaev(SYK)model,random matrix theory(RMT),and the Bose−Hubbard model.

关键词： spectral form factor open quantum system quantum chaos

Manipulating submolecular-scale phototautomerization

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Science China Materials 2024年第6期67卷 2048-2050页

作者： Ping zhou Hongliang Chen Stoddart Institute of Molecular Science Department of ChemistryZhejiang UniversityHangzhou 310058China Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials ZJU-Hangzhou Global Scientific and Technological Innovation CenterZhejiang UniversityHangzhou 311215China

A recent study on the submolecular-scale control of phototautomerization methods and the underlying reaction mechanisms was reported in Nature nanotechnology by Guillaume and co-workers[1],elucidating how the field confinement effect generated by the scanning tunneling microscope(STM)tip precisely triggers the phototautomerization of a free-base phthalocyanine at the submolecular level and demonstrating that the reaction process can be finely controlled by adjusting either the laser excitation wavelength or the position of the tip.

关键词： tunneling excitation phthalocyanine