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A Study of the Thermal Characteristics of NiCuZn Ferrite Chip Inductors

材料科学与工程（中英文B版） 2015年第1期5卷 1-11页

作者： yin-lai-chai Shih-Feng Chien Wen-Hsi Lee Po-Chih Shen Department of Jewelry Technology Dahan Institute of Technology Hualien County 97145 Taiwan (R.O.C.) Department of Electrical Engineering Cheng Kung University Tainan City 701 Taiwan (R. O. C.) Cyntec Co. LTD. Hsinchu County 30076 Taiwan (R. O. C)

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Analysis of Differences in Inductance of Ni-Cu-Zn Ferrite Chip Inductors during the Plating Process

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Journal of Chemistry and Chemical Engineering 2014年第12期8卷 1125-1134页

作者： yin-lai chai Shih-Feng Chien Wen-Hsi Lee Chin-Pei Lin Wen-Yu Lin Pei-Yi Wei Department of Jewelry Technology Dahan Institute of Technology Hualien County 97145 Taiwan (R. O. C.) Department of Electrical Engineering Cheng Kung University Tainan City 701 Taiwan (R. O. C.) Cyntec Co. LTD. Hsinchu County 30076 Taiwan (R.O.C.)

Although plating is a necessary process for SMT components, it alters the magnetic characteristics and inductance level of Ni-Cu-Zn ferrite components. The results of this work show that the following three factors in plating affect these components, and the effects are different for Ni- and Sn-plating：（1） Plating layers exert stresses and react with the residual stress of components to change the inductance level, and the effect of the tin layer is greater than that of the nickel one; （2） The plating current induces a magnetic field inside the components directly and indirectly, and this remains as remanence inside the components and reduces the inductance level, and the effect level of Ni-plating is greater than that of Sn-plating; （3） The plating solution corrodes the interface of the termination and ferrite core of the components to release the residual stress, and causes an increase in inductance, and the effect of Sn-plating is greater than that of Ni-plating. In addition, the inductance level is the result of the net effect of these three factors, and if the sintering temperature is increased to change in the type of residual stress, the net effect will be changed.

关键词： Plating ferrite stress inductors

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A Study of the Stress Induced during Manufacturing Processes of Chip Inductors

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材料科学与工程（中英文A版） 2015年第1期5卷 1-7页

作者： yin-lai-chai Shih-Feng Chien Wen-Ting Chen Wen-Hsi Lee Pei-Yi Wei Wen-Yu Lin Po-Chih Shen Department of Jewelry Technology Dahan Institute of Technology Hualien County 97145 Taiwan (R. O. C.) Department of Electrical Engineering National Cheng Kung University Tainan 701 Taiwan (R.O.C.) Cyntec Co. LTD. Hsinchu County 30076 Taiwan (R.O.C.)

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Dip2a regulates stress susceptibility in the basolateral amygdala

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Neural Regeneration Research 2025年第6期20卷 1735-1748页

作者： Jing Li Zixuan He Weitai chai Meng Tian Huali Yu Xiaoxiao He Xiaojuan Zhu Key Laboratory of Molecular Epigenetics Ministry of Education Institute of Genetics and CytologyNortheast Normal UniversityChangchunJilin ProvinceChina

Dysregulation of neurotransmitter metabolism in the central nervous system contributes to mood disorders such as depression, anxiety, and post–traumatic stress disorder. Monoamines and amino acids are important types of neurotransmitters. Our previous results have shown that disco-interacting protein 2 homolog A(Dip2a) knockout mice exhibit brain development disorders and abnormal amino acid metabolism in serum. This suggests that DIP2A is involved in the metabolism of amino acid–associated neurotransmitters. Therefore, we performed targeted neurotransmitter metabolomics analysis and found that Dip2a deficiency caused abnormal metabolism of tryptophan and thyroxine in the basolateral amygdala and medial prefrontal cortex. In addition, acute restraint stress induced a decrease in 5-hydroxytryptamine in the basolateral amygdala. Additionally, Dip2a was abundantly expressed in excitatory neurons of the basolateral amygdala, and deletion of Dip2a in these neurons resulted in hopelessness-like behavior in the tail suspension test. Altogether, these findings demonstrate that DIP2A in the basolateral amygdala may be involved in the regulation of stress susceptibility. This provides critical evidence implicating a role of DIP2A in affective disorders.

关键词： 5-hydroxytryptamine acute restraint stress basolateral amygdala CaMKII neurons DIP2A metabolomics neurotransmitters principal component analysis stress susceptibility tryptophan

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Radiation damage of 1Cr18Ni9Ti and Zr-Ti-Al alloys due to energetic particle irradiation

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Acta Metallurgica Sinica(English Letters) 2012年第1期25卷 29-39页

作者： Maosheng chai Wensheng lai Zhengcao LI Wei FENG Department of Materials Science and Engineering Tsinghua UniversityBeijing 100084China

The radiation damage of 1Cr18Ni9Ti stainless steel and the Zr-Ti-Al alloy by 200 keV Xe＋ ions bombardment at the fluence ranging from 1×1014 to 8×1015 ions/cm2 has been investigated by conventional transmission electron microscope, X-ray diffraction line profile analysis （XRDLPA） and nanoindentation. XRDLPA shows that the order of magnitude of dislocation density in both materials remains almost unchanged up to the highest irradiation dose. Selected-area electron diffraction combined with bright and dark field image indicates that 1Cr18Ni9Ti is more easily damaged than the Zr-Ti-Al alloy. With increasing the ions fluence, the radiation damage became more severe in 1Cr18Ni9Ti, accompanied with phase transition and partial amorphization. The nano-hardness was found to increase rapidly with increasing ion fluence till the dose of 1×1015 ions/cm2, and then gradually saturate with dose. The enhancement of hardness in irradiated materials is due to irradiation-induced defects acting as barriers to dislocation motion.

关键词： Damage structure Zr-Ti-Al alloy 1Cr18Ni9Ti stainless steel XRD TEM Irradiation Depth profile

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A Novel Rolling Bearing Vibration Impulsive Signals Detection Approach Based on Dictionary Learning

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IEEE/CAA Journal of Automatica Sinica 2021年第6期8卷 1188-1198页

作者： Chuan Sun Hongpeng yin Yanxia Li Yi chai School of Big Data&Software Engineering Chongqing UniversityChongqing 401331China Key Laboratory of Complex System Safety and Control Ministry of EducationChongqing UniversityChongqing 400044China

The localized faults of rolling bearings can be diagnosed by its vibration impulsive ***,it is always a challenge to extract the impulsive feature under background noise and non-stationary *** paper investigates impulsive signals detection of a single-point defect rolling bearing and presents a novel data-driven detection approach based on dictionary *** overcome the effects harmonic and noise components,we propose an autoregressive-minimum entropy deconvolution model to separate harmonic and deconvolve the effect of the transmission *** address the shortcomings of conventional sparse representation under the changeable operation environment,we propose an approach that combines K-clustering with singular value decomposition(K-SVD)and split-Bregman to extract impulsive components *** experiments on synthetic signals and real run-to-failure signals,the excellent performance for different impulsive signals detection verifies the effectiveness and robustness of the proposed ***,a comparison with the state-of-the-art methods is illustrated,which shows that the proposed approach can provide more accurate detected impulsive signals.

关键词： Dictionary learning impulsive signals detection Kclustering with singular value decomposition(K-SVD) minimum entropy deconvolution rolling bearing signal processing

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Effects of nitrogen and phosphorus concentrations on the bioaccumulation of polybrominated diphenyl ethers by Prorocentrum donghaiense

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Journal of Environmental Sciences 2013年第2期25卷 376-385页

作者： Chao chai Xundong yin Wei Ge Jinye Wang College of Resources and Environment Qingdao Agricultural University College of Life Sciences Qingdao Agricultural University College of Animal Science and Veterinary Qingdao Agricultural University

The growth, cellular total lipids, bioaccumulation amount, and bioaccumulation factors （BAFs） of 2,4,4 ′ -tribromodiphenyl ether （BDE28）, 2,2 ′ ,4,4 ′ -tetrabromodiphenyl ether （BDE47）, and 2,2 ′ ,4,4 ′ ,5-pentabromodiphenyl ether （BDE99） in a semi-continuous culture of Prorocentrum donghaiense were studied in relation to nitrate （0, 128, and 512 μmol/L） and phosphate （0, 8, and 32 μmol/L） concentrations. The BDE28, BDE47, and BDE99 content per cell under 0 μmol N/L were 3.77 × 10 6 , 3.95 × 10 6 , and 4.32 × 10 6 ng/cell, respectively, which were significantly higher than those under 128 and 512 μmol N/L. A nearly 5-fold increase in polybrominated diphenyl ether （PBDE） content per algal cell was found between 0 and 8 μmol P/L and between 8 and 32 μmol P/L. With increasing N and P concentrations, the PBDE content per volume of algal culture and the accumulation percentage of available PBDEs declined slightly. The BAFs for the PBDEs based on lipids showed that the logBAF lip under 0 μmol N/L was higher than those under 128 and 512 μmol N/L. The logBAF lip under 0 μmol P/L was higher than that under 8 μmol P/L but lower than that under 32 μmol P/L. Correlation analysis indicated a significant negative correlation between nutrient concentration and cellular total lipids, as well as the PBDE content per cell. The results indicate that different N and P concentrations change the total lipids content of P. donghaiense, thereby resulting in varying PBDE accumulation.

关键词： nitrogen phosphorus bioaccumulation polybrominated diphenyl ethers Prorocentrum donghaiense

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The Effect of Send/Receive Dual Channel Parameters on Polarization Parameters Measurement

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Chinese Journal of Electronics 2017年第2期26卷 336-344页

作者： ZHANG Wenwen yin Fulian chai Juanfang BAI Xuesong Beijing Aerospace System Engineering Institute Information Engineering School Communication University of China Shanghai Electromechanical Engineering Institute

The dual-linear polarization radar is what China will popularize gradually following the Doppler radar *** the Doppler radar technology,the dual-linear polarization radar,which has been widely applied to enhancing modem weather radar system,becomes more and more popular in *** characteristics of hydrometeors,such as differential reflectivity,specific differential phase,and zero-lag correlation coefficient,are usually provided by the *** by the angular orientation of the feed,drop canting,and backscatter depolarization,however,inevitable measurement errors exit because of the unwanted horizontal and vertical wave *** small errors in these sensitive parameters may lead to erroneous judgment,both the factors themselves and their weights of influence should be studied specifically,with the mode of simultaneous transmission and reception of horizontally and vertically polarized *** study provides theoretical basis for the design of dual polarization Doppler radar,and will be helpful in the research of cloud,precipitation physics,and weather modification.

关键词： Doppler radar Dual-polarization technology Weather modification Elliptically polarized light Send/receive

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The compound(E)-2-(3,4-dihydroxystyryl)-3-hydroxy-4H-pyran-4-one alleviates neuroinflammation and cognitive impairment in a mouse model of Alzheimer's disease

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Neural Regeneration Research 2025年第11期20卷 3330-3344页

作者： Xueyan Liu Wei Wu Xuejuan Li Chengyan Wang Ke chai Fanru Yuan Huijuan Zheng Yuxing Yao Chenlu Li Zu-Cheng Ye Daijun Zha Department of Medicinal Chemistry School of PharmacyFujian Medical UniversityFuzhouFujian ProvinceChina Fujian Provincial Key Laboratory of Brain Aging and Neurodegenerative Diseases School of Basic Medical SciencesFujian Medical UniversityFuzhouFujian ProvinceChina Institute of Laboratory Animal Center Fujian Medical UniversityFuzhouFujian ProvinceChina Department of Neurosurgery Neurosurgery Research InstituteThe First Affiliated HospitalFujian Medical UniversityFuzhouFujian ProvinceChina Department of Hyperbaric Oxygen National Regional Medical CenterBinhai Campus of the First Affiliated HospitalFujian Medical UniversityFuzhouFujian ProvinceChina

Previous studies have shown that the compound(E)-2-(3,4-dihydroxystyryl)-3-hydroxy-4H-pyran-4-one(D30),a pyromeconic acid derivative,possesses antioxidant and anti-inflammatory properties,inhibits amyloid-β aggregation,and alleviates scopolamine-induced cognitive impairment,similar to the phase Ⅲ clinical drug *** this study,we established a mouse model of Alzheimer's disease via intracerebroventricular injection of fibrillar amyloid-β to investigate the effect of D30 on fibrillar amyloid-β-induced *** results showed that D30 alleviated fibrillar amyloid-β-induced cognitive impairment,promoted fibrillar amyloid-β clearance from the hippocampus and cortex,suppressed oxidative stress,and inhibited activation of microglia and astrocytes.D30 also reversed the fibrillar amyloid-β-induced loss of dendritic spines and synaptic protein ***,we demonstrated that exogenous fibrillar amyloid-βintroduced by intracerebroventricular injection greatly increased galectin-3 expression levels in the brain,and this increase was blocked by *** the role of D30 in clearing amyloid-β,inhibiting neuroinflammation,protecting synapses,and improving cognition,this study highlights the potential of galectin-3 as a promising treatment target for patients with Alzheimer's disease.

关键词： Alzheimer's disease amyloid-β astrocyte cognitive impairment D30 dendritic spines galectin-3 microglia neuroinflammation neuron

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Mechanical and thermal properties of mesogen-jacketed liquid crystalline polymer/epoxy resin composites

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Science China Chemistry 2015年第6期58卷 1021-1026页

作者： Chunpeng chai Fangfang yin Guoping Li Yunjun Luo School of Material Science and Engineering Beijing Institute of Technology

The effects of mesogen-jacketed liquid crystalline polymer poly(dipropyl vinylterephthalate)(PDPVT) on the mechanical and thermal properties of diglycidyl ether of bisphenol-A(DGEBA) epoxy resin were investigated by impact test, tensile test and thermogravimetric analysis(TGA). The mechanism underlying the enhancement of mechanical properties of epoxy resin was studied using 1D wide-angle X-ray diffraction(WAXD) and scanning electron microscope(SEM). It was found that the mechanical properties of 1 wt%–5 wt% PDPVT/DGEBA composites were significantly improved compared to neat epoxy resin. Especially, the epoxy resin with 3 wt% PDPVT had the greatest increase in mechanical properties, with the impact strength, tensile strength and elongation while breaking increased by 87%, 59% and 174%, respectively. The increased mechanical strength was due to the fact that PDPVT maintained liquid crystalline phase in cured PDPVT/DGEBA composites, which would blunt the crack tip and prevent crack propagation. Moreover, PDPVT had slight effect on the thermal stability properties of epoxy resin.

关键词： mesogen-jacketed liquid crystalline polymer epoxy resin mechanical properties thermal stability properties

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