Results 11 to 20 of about 1,019,871 (171)

西安高压电瓷厂制成数字式峰值电压表 附视频

open access: yesDianci bileiqi, 1971
前言长期以来,由于受苏修条条框框的束缚,高压测量中的工频放电电压的测量一直以有效值作为依据。实践证明,这种测试方法是不合理的,这是因为,用于高压试验的电源,并非标准的正弦波,且往往会有高次谐波,这样,就使测试数据依波形而变,引起较大的测量误差,直接影响了产品的质量签定。因此,如何准确测量电压波的峰值便成了高压试验的一个重要课题。在伟大领袖毛主席“打破洋框框,走自己工业发展道路”的光辉指示指引下 ...
西安高压电瓷厂高压试验站
doaj  

Making Interview Multilingualism Visible: Transnational Chinese Language Teacher Identity Construction

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT This study examines multilingual practices in research interviews, focusing on English lexical insertions in Chinese‐language research interviews with teachers of Chinese in Australian secondary schools, and treating these code‐switches as analytically meaningful rather than incidental.
Chengwen Yuan, Tianwei Zhang, Gary Bonar
wiley   +1 more source

老年高血压伴肥胖患者血清MMP-9、MCP-1水平的变化及其临床意义的研究

open access: yesZhongguo shiyan zhenduanxue, 2011
目的探讨老年高血压伴肥胖患者血清基质金属蛋白酶-9(MMP-9)、单核细胞趋化因子-1(MCP-1)水平的变化及其临床意义。方法将符合纳入、排除标准的高血压患者分为高血压肥胖组和单纯高血压组,正常血压者分为单纯肥胖组和正常对照组。高血压的诊断依据2005年中国高血压防治指南诊断标准,肥胖诊断依据按BMI≥25 kg/m2(亚太地区标准)。对所有受试者进行一般检查及血糖、血脂等生化检查,Elisa法测定血清MCP-1和MMP-9水平。结果①单纯肥胖组、单纯高血压组、高血压肥胖组BMI、TG、LDL ...
杜健   +4 more
doaj  

紫苏籽油的抗衰老作用及机制探究 Anti-aging effect and mechanisms of perilla seed oil

open access: yesZhongguo youzhi
旨在为紫苏籽油的开发利用提供理论依据,以D-半乳糖(500 mg/kg)在小鼠颈背部皮下连续注射4周建立小鼠衰老模型后,将小鼠随机分为模型对照组(生理盐水)、阳性对照组(维生素C 200 mg/kg)和紫苏籽油高(5 mL/kg)、中(2.5 mL/kg)、低(1.25 mL/kg)剂量组,连续灌胃4周,记录小鼠体质量及行为变化,通过转棒法和金属网法检测小鼠的协调运动能力,测定小鼠主要脏器(脑、胸腺、脾脏)指数以及小鼠血清和脑组织匀浆中谷胱甘肽过氧化物酶(GSH-Px)活力和丙二醛(MDA)含量 ...
王荣1,2,3,王娜娜1,2,3,杨宽1,2,3,刘自群1,秦蓓1,2,3 WANG Rong1,2,3,WANG Nana1,2,3, YANG Kuan1,2,3, LIU Ziqun1,QIN Bei1,2,3
doaj   +1 more source

Joseonjok (Korean‐Chinese) as an Internal Normative Center: Perceptions of Linguistic Ownership Among Chinese Learners of Korean

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT While existing research on Korean as a foreign language (KFL) has increasingly focused on learner motivation, KFL learners’ linguistic ownership remains underexplored. This study addresses this gap by examining how Han Chinese learners of Korean perceive and negotiate their linguistic ownership in relation to the perceived linguistic capital ...
Yunzhe Huang, Mi Yung Park
wiley   +1 more source

土法上马建成大方窑 附视频

open access: yesDianci bileiqi, 1971
在伟大领袖毛主席《鞍钢宪法》和“复电”精神的指引下,在贯彻落实党中央最新战斗号令,开展对敌斗争中、西瓷厂革委会、军宣队领导全厂职工,大力发扬延安精神,“艰苦奋斗”、“自力更生”不向国家要投资、要人,自己动手,土法上马,在短短的二十多天里,就建成一座大型方窑。是贪大求洋还是士法上马?70年,西瓷厂担负着国家许多重点建设工程及国防 ...
西安高压电瓷厂
doaj  

Disentangling atmospheric and soil drought: a new stand‐level manipulation approach for mature forests

open access: yesNew Phytologist, EarlyView.
Design of the VPDrought experiment in a Scots pine (Pinus sylvestris) forest at the Pfynwald research platform. Summary Atmospheric and soil drought are major, yet typically confounded, drivers of tree stress. Rising vapor pressure deficit (VPD) may impair forest function independently of soil moisture decline, yet stand‐scale experimental separation ...
Marcus Schaub   +9 more
wiley   +1 more source

焙烧大型电瓷隧道窑的调试 附视频

open access: yesDianci bileiqi, 1974
随着我国电力工业的发展,需要更多的高压电器电站电瓷,我们兴建丁一座截面较大的隧道窑,供110千伏以上的大棒型和大套管焙烧用。这座窑建成后于71年10月正式试调,现将试调情况作一简介。
西安高压电瓷厂
doaj  

Physical Model for Quantitative Organization Design on Mechanical Performance of Nanotwin Unit in Face‐Centered Cubic Metal

open access: yesRare Metals, Volume 45, Issue 11, November 2026.
ABSTRACT Arranging functional units into a specific organization is a practical structural strategy for achieving fabulous performance, known as the functional unit and organization (FUO) paradigm. This paradigm offers a concise shortcut to establishing structure–performance relationships.
Zhongtao Lu   +5 more
wiley   +1 more source

高考备考减压有良方 

open access: yes, 2005
 高三同学面对决定人生命运的高考,一定承受很大的压力!这是很自然的事.不过,要知道,要想学习好,要想提高学习效率,要想激发人体潜在的心理能量,就必须有适当的压力.有压力才有动力.但是,我们说的减压指的是有些同学承受的压力过大,不仅没起到动力的作用,反而成为过大的心理负担,影响了人的智力因素的发挥,影响了人的生物节律,影响了学习效率的提高.所以,我们说,对压力过大的同学要进行减压,把潜在的心理能量发挥出来,提高学习效率,提高学习成绩.
王极盛
core   +1 more source

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