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Thermal stability improvement and microstructure optimization of high cobalt content Nd-Fe-B magnets via terbium grain boundary diffusion

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Journal of Rare Earths 2024年第8期42卷 1531-1538,I0004页

作者： Jiyuan xu ruiyang Meng Jing Liu Jiateng Zhang Rui Han Yikun Fang Shengzhi Dong Wei Li Division of Functional Materials Research Central Iron and Steel Research InstituteBeijing100081China

The substitution of Fe by Co in the 2:14:1 phase is an effective method to increase the Curie temperature and enhance the thermal stability of the Nd-Fe-B ***,the accumulation of Co ele ment at the grain boundaries(GBs) changes the GBs from nonmagnetic to ferromagnetic and causes the thinlayer GBs to become rare,In this paper,the method of diffusing Tb element was chosen to improve the microstructure and temperature stability of high-Co *** original sintered Nd_(28.5)Dy_(3)-CO_(x)e_(bal)M_(0.6)B_(i)(x=0,6 wt%,12 wt%;M = Cu,Al,Zr) magnets with different Co contents were diffused with Tb by grain boundary diffusion(GBD).After GBD,high-Co magnets exhibit more continuously distributed thin-layer GBs,and their thermal stability is significantly *** high-Co magnets(x=6 wt%),the absolute value of the temperature coefficient of coercivity decreases from 0.603%/K to0.508%/K in the temperature range of 293-413 K,that of remanence decreases from 0.099%/K to 0.091%/K,and the coercivity increases from 18.44 to 25.04 *** electron microscopy(TEM)characterization reveals that there are both the 1:2 phase and the amorphous phase in the high-Co magnet before and after GBD,EDS elemental analysis shows that Tb element is more likely to preferentially replace the rare earth elements in the 2:14:1 main phase than in the 1:2 phase and the amorphous *** concentration of Tb at the edge of the main phase is much higher than that in the 1:2phase and amorphous phase,which is beneficial to the improvement of the *** preferential replacement of Tb elements at the edge of the 2:14:1 phase and thin-layer GBs with a more continuous distribution are synergistically responsible for improving the thermal stability of high-Co *** study indicates that GBD is an effective method to improve the microstructure and thermal stability of high-Co magnets.

关键词： Nd-Fe-B magnets Coercivity Grain boundary diffusion Thermal stability Micro structure Rare earths

兴安百里香精油对草莓保鲜作用及生理变化研究

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中国农机化学报 2015年第3期36卷 180-185页

作者：丛建民陈凤清王睿哲高枫王梦璇许睿旸白城师范学院生命科学学院吉林白城137000

常温下以香辛料兴安百里香精油熏蒸气调保鲜草莓,从贮存期草莓的失重率、腐烂指数、可溶性固形物、VC含量、可滴定酸、可溶性还原糖、过氧化氢酶(CAT)、过氧化物酶(POD)、多酚氧化酶(PPO)比活力指标来研究兴安百里香精油对草莓的保鲜效... 详细信息

常温下以香辛料兴安百里香精油熏蒸气调保鲜草莓,从贮存期草莓的失重率、腐烂指数、可溶性固形物、VC含量、可滴定酸、可溶性还原糖、过氧化氢酶(CAT)、过氧化物酶(POD)、多酚氧化酶(PPO)比活力指标来研究兴安百里香精油对草莓的保鲜效果。试验结果:品质指标中,精油熏蒸气调可减少失重率、降低腐烂指数、保持较高可溶性固形物含量;生理指标中,精油熏蒸气调可有效减缓VC含量、可滴定酸含量、可溶性还原糖的降低;抗氧化酶系指标中,精油熏蒸气调的CAT比活力、PPO比活力均高于对照,但对POD比活力影响不明显。可见,兴安百里香精油熏蒸气调保鲜草莓可一定程度延长草莓的贮存期。

关键词：香辛料兴安百里香草莓保鲜

The Risk Role of Defeat on the Mental Health of College Students:A Moderated Mediation Effect of Academic Stress and Interpersonal Relationships

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International Journal of Mental Health Promotion 2024年第9期26卷 731-744页

作者： ruiyang Han Tingting xu Yin Shi Wuyi Liu School of Public Health Shandong Second Medical UniversityWeifang261053China Faculty of Education Beijing Normal UniversityBeijing100875China School of Clinical Medicine Shandong Second Medical UniversityWeifang261053China

Background:College students face significant academic and physiological changes,making them more susceptible to psychological issues such as depression,self-injury,and suicidal *** of defeat can exacerbate these risks by increasing academic ***,interpersonal relationships can moderate the impact of academic stress on students’mental *** the presage–process–product model,this study aims to empirically investigate how feelings of defeat influence depression,self-injury,and suicidal ideation among college ***,it explores the mediating role of academic stress and the moderating role of various types of interpersonal ***:A total of 1612 college students(750 females,862 males,mean age=19.64±0.62 years)were recruited through cluster *** were collected via offline questionnaires administered by a trained psychology teacher and a postgraduate student,ensuring high reliability with two examiners per *** profile analysis(LPA)was used to examine the impact of defeat on mental health outcomes,while mediation analysis was conducted to assess the roles of academic stress and interpersonal ***:*** is identified as a significant risk factor for mental health issues among college students;*** distinct patterns of interpersonal relationships were identified:the interpersonal-relationship risk group,the father–child-relationship high-risk group,the general interpersonal-relationship group,and the superior interpersonal-relationship group;*** stress partially mediates the relationship between defeat and mental health issues such as depression,self-injury,and suicidal ideation;*** interpersonal relationship models moderate the impact of academic stress on depression and suicidal ***:Defeat is a significant risk factor for mental health problems in college *** stress partially mediates the negative impact of defeat on mental he

关键词： Student mental health defeat academic stress interpersonal relationships mediation test

Significance of the auditory meatus inferior wall cartilage in the surgical treatment of congenital first branchial cleft anomalies in children

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World Journal of Pediatric Surgery 2023年第4期6卷 276-281页

作者： Bo Yu ruiyang Zhu Yong Fu Bin xu Lulu Yu Jing Bi Department of ENT and Head&Neck Surgery Children's HospitalZhejiang University School of MedicineHangzhouChina School of Stomatology Zhejiang Chinese Medical UniversityHangzhouChina

Objective To investigate the clinical significance of the inferior wall cartilage of the auditory meatus in surgical treatment of congenital first branchial cleft anomalies(CFBCAs)in *** Twenty children diagnosed with CFBCAs who underwent surgery between December 2018 and June 2022 at our hospital were retrospectively analyzed and classified according to their Work lesion *** guiding significance of the inferior wall cartilage in the surgical treatment of CFBCAs was summarized by investigating the adjacent relationships of the surgical lesions with the external auditory canal and facial *** Of the 20 patients,16 were classified as Work type Ⅰ and 4 as Work type Ⅱ.The lesions were adjacent to the inferior wall cartilage of the auditory meatus in all *** type Ⅰ lesions were located in the upper lateral aspect and were not adjacent to the facial *** type Ⅱ lesions were located in the inferior-medial region of the facial *** lesions were completely resected in all *** patient experienced recurrence 3 months postoperatively because of a residual endochondral *** patients developed facial paralysis or other *** The inferior wall cartilage of the auditory meatus may help to the identify the initial lesion of the CFBCAs and can be regarded as a guiding anatomical *** lesions can be completely *** resection of Work type II first branchial cleft lesions,the surgical incision can be narrower,and can be precisely positioned with the assistance of endoscope.

关键词： auditory surgical congenital

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干熄炉冷却室周边悬料的分析与处理

煤化工 2009年第6期37卷 58-60页

作者：罗时政康春清王黎明乔继军徐瑞阳齐婳济南钢铁股份有限公司焦化厂济南250101 山东石横特钢集团有限公司泰安271612

详述了山东石横特钢集团有限公司140 t/h干熄焦系统在开工初期冷却室周边悬料的产生,从干熄炉砌筑、装入冷焦质量、烘炉、系统工艺控制等方面分析了产生焦炭悬料的原因,同时结合实际情况,通过采取调整配风、料位、排焦量、系统压力等措... 详细信息

详述了山东石横特钢集团有限公司140 t/h干熄焦系统在开工初期冷却室周边悬料的产生,从干熄炉砌筑、装入冷焦质量、烘炉、系统工艺控制等方面分析了产生焦炭悬料的原因,同时结合实际情况,通过采取调整配风、料位、排焦量、系统压力等措施,在短时间内有效地解决了悬料问题,实现了干熄焦系统的顺利开工和达产达效。

关键词：干熄炉周边悬料焦炭系统压力配风

Rhizospheric microbial communities are driven by Panax ginseng at different growth stages and biocontrol bacteria alleviates replanting mortality

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Acta Pharmaceutica Sinica B 2018年第2期8卷 272-282页

作者： Linlin Dong Jiang xu Lianjuan Zhang ruiyang Cheng Guangfei Wei He Su Juan Yang Jun Qian Ran xu Shilin Chen Key Laboratory of Beijing for Identification and Safety Evaluation of Chinese Medicine Institute of Chinese Materia Medica China Academy of Chinese Medical Sciences

The cultivation of Panax plants is hindered by replanting problems, which may be caused by plantdriven changes in the soil microbial community. Inoculation with microbial antagonists may efficiently alleviate replanting issues. Through high-throughput sequencing, this study revealed that bacterial diversity decreased,whereas fungal diversity increased, in the rhizosphere soils of adult ginseng plants at the root growth stage under different ages. Few microbial community, such as Luteolibacter, Cytophagaceae, Luteibacter, Sphingomonas,Sphingomonadaceae, and Zygomycota, were observed; the relative abundance of microorganisms, namely,Brevundimonas, Enterobacteriaceae, Pandoraea, Cantharellales, Dendryphion, Fusarium, and Chytridiomycota,increased in the soils of adult ginseng plants compared with those in the soils of 2-year-old seedlings. Bacillus subtilis 50-1, a microbial antagonist against the pathogenic Fusarium oxysporum, was isolated through a dual culture technique. These bacteria acted with a biocontrol efficacy of 67.8%. The ginseng death rate and Fusarium abundance decreased by 63.3% and 46.1%, respectively, after inoculation with B. subtilis 50-1. Data revealed that microecological degradation could result from ginseng-driven changes in rhizospheric microbial communities;these changes are associated with the different ages and developmental stages of ginseng plants. Biocontrol using microbial antagonists alleviated the replanting problem.

关键词： Panax ginseng Microbial communities Replanting problem High-throughput sequencing Different ages Bioremediation

INDEPENDENTLY-TUNED CONCURRENT DUAL-BAND BRANCH-LINE COUPLER USING VARACTOR

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Journal of Electronics(China) 2014年第4期31卷 348-353页

作者： Guo Xiaofeng Ye Yan Liu Taijun xu Qian Li ruiyang College of Information Science and Engineering Ningbo University

This paper presents a concurrent dual-band branch-line coupler with an independently tunable center frequency. In the proposed architecture, the quarter-wavelength lines, which work at two separated bands concurrently and can be tuned in one of them, are key components. Based on the analysis of ABCD-matrix, a novel hybrid structure and a pair of varactors topology are utilized to achieve concurrent dual-band operation and independent tunability, respectively. Using this configuration, it is convenient to tune the center frequency of the upper band, while the responses of the lower band remain unaltered. To verify the proposed idea, a demonstration is implemented and the simulated results are presented.

关键词： Branch-line coupler Concurrent dual-band Varactor Independently tuned Quarter-wavelength lineCLC number:TN92

Sulfur-substitution-enhanced crystallization and crystal structure of poly(trimethylene monothiocarbonate)

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Chinese Chemical Letters 2022年第2期33卷 1021-1024页

作者： Xiaohan Cao Hongliang Wang Jialiang Yang ruiyang Wang Xin Hong Xinghong Zhang Junting xu Hai Wang MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China Center of Chemistry for Frontier Technologies Zhejiang UniversityHangzhou 310027China Department of Chemistry Zhejiang UniversityHangzhou 310027China Department of Polymer Science and Engineering College of Chemical EngineeringDalian University of TechnologyDalian 116024China

In this paper,the crystallization behavior of a novel poly(monothiocarbonate),poly(trimethylene monothiocarbonate)(PTMMTC),was investigated and compared with its polycarbonate analogue,poly(trimethylene carbonate)(PTMC).It is found that PTMMTC exhibits strong crystallizability,while un-stretched PTMC is *** and DMA results reveal that PTMMTC possesses higher glass transition temperature(T_(g))andβ-transition temperature(T_(β))than *** based on density functional theory(DFT)shows that,the bond angle of C-S-C is evidently smaller than that of C-O-C,and thus a larger dipole *** leads to the stronger intermolecular interaction and more rigid chain confor-mation in PTMMTC,which is the origin of sulfur-substitution enhanced *** crystal struc-ture of PTMMTC was preliminarily determined for the first *** has an orthorhombic crystal structure with a planar zig-zag chain *** parameters of unit cell are a=10.74 A,b=4.79 A,and c(fiber axis)=7.74 A.

关键词： Poly(monothiocarbonate) Polycarbonate Crystallization behavior Crystal structure Sulfur substitution enhanced crystallization

Pathology of pain and its implications for therapeutic interventions

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Signal Transduction and Targeted Therapy 2024年第7期9卷 2851-2899页

作者： Bo Cao Qixuan xu Yajiao Shi ruiyang Zhao Hanghang Li Jie Zheng Fengyu Liu You Wan Bo Wei Department of General Surgery First Medical CenterChinese PLA General HospitalBeijing 100853China Medical School of Chinese PLA Beijing 100853China Neuroscience Research Institute and Department of Neurobiology School of Basic Medical SciencesKey Laboratory for NeuroscienceMinistry of Education/National Health CommissionPeking UniversityBeijing 100191China

Pain is estimated to affect more than 20%of the global population,imposing incalculable health and economic *** pain management is crucial for individuals suffering from ***,the current methods for pain assessment and treatment fall short of clinical *** from advances in neuroscience and biotechnology,the neuronal circuits and molecular mechanisms critically involved in pain modulation have been *** research achievements have incited progress in identifying new diagnostic and therapeutic *** this review,we first introduce fundamental knowledge about pain,setting the stage for the subsequent *** review next delves into the molecular mechanisms underlying pain disorders,including gene mutation,epigenetic modification,posttranslational modification,inflammasome,signaling pathways and *** better present a comprehensive view of pain research,two prominent issues,sexual dimorphism and pain comorbidities,are discussed in detail based on current *** status quo of pain evaluation and manipulation is summarized.A series of improved and innovative pain management strategies,such as gene therapy,monoclonal antibody,brain-computer interface and microbial intervention,are making strides towards clinical *** highlight existing limitations and future directions for enhancing the quality of preclinical and clinical *** to decipher the complexities of pain pathology will be instrumental in translating scientific discoveries into clinical practice,thereby improving pain management from bench to bedside.

关键词： pain thereby summarized