Results 81 to 90 of about 4,395 (150)

硝酸铝掺杂氧化锌压敏电阻的制备及性能研究

Dianci bileiqi
采用固相烧结法制备ZnO-Bi2 O3基压敏电阻，研究了不同比例Al（NO3）·9 H2 O的掺杂对ZnO压敏电阻微观形貌、结构和电气性能的影响。通过X射线衍射仪（XRD）、场发射扫描电子显微镜（FESEM）及电化学工作站分别对样品的物相、形貌及阻抗性能进行表征。结果表明：Al （NO3）·9 H2 O的加入不仅具有促进ZnO晶粒生长和提升晶粒均匀分布的作用，而且能显著降低ZnO晶粒电阻，进而降低残压比。在Al（NO3）·9 H2 O添加量为（0 ～0.015）%（摩尔分数，下同）范围内 ...
王国群, 涂远生, 黄俊逸, 时天竣, 吴桐, 武东辉, 桂阳海, 黄海   +7 more
doaj  

[Risk factor analysis of excessive resection of facet joint after large-channel spinal endoscopic depression for degenerative lumbar diseases]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Yan T, Zeng J, Lin X, Li T, Wu C.
europepmc   +1 more source

[Magnetic one-step purification-high performance liquid chromatography-triple quadrupole/composite linear ion trap mass spectrometry for the determination of 54 veterinary drug residues in carp]. [PDF]

Se Pu
Wen YP, Huo WD, Zhang CY, Liu H, Mu YC, Wu LD, Li JC.   +6 more
europepmc   +1 more source

[Establishment and international comparison of reference methods for glycated hemoglobin]. [PDF]

Se Pu
Wang M, Zhang SL, Zhang R, Song YC, Shi J, Xue QZ, Hu YW.   +6 more
europepmc   +1 more source

[Early effectiveness and safety of mini open endoscopy assisted anterior cervical discectomy and fusion in treatment of cervical spondylotic myelopathy]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Pan X, Wang X, Wang C, Su W, Sheng J.
europepmc   +1 more source

[Rare massive upper gastrointestinal bleeding: Three cases of Dieulafoy<b>'</b>s disease within diverticula of the descending duodenal and a literature review]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Zhao Q, Zhang J, Zhou Q, He Z, Li H.
europepmc   +1 more source

金属氧化物避雷器陡波冲击电流试验

Dianci bileiqi, 1991
IEC37草案用波前1μs冲击电流和40/100μs操作电流作试验。此时需注意阀片残压的初始过冲。许多制造厂做0.1μs波前的电流波试验。这种试验装置很昂贵,又很难与4/10μs电流波装置结合起来使用,而且同一阀片用不同试验装置试验时,残压起始过冲相差很大。
doaj  

[A case of segmental atrophy of the liver in children]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
Qiu YL, Mao Y, Lu CL.
europepmc   +1 more source

[Laparoscopic modified transcystic biliary drainage for the treatment of biliary stones and diagnosis of biliary disease]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Zhang L, Wang G, Hou C, Cui L, Wang L, Ling X, Xu Z.   +6 more
europepmc   +1 more source

[Extracellular matrix materials and tissue regeneration and repair]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhao L, Xie H.
europepmc   +1 more source