全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:Wei Cheng , Yuan Wang
来源:[J].Journal of Infrared, Millimeter, and Terahertz Waves(IF 1.12), 2017, Vol.38 (5), pp.583-595Springer
摘要:This paper presents a small-signal model for InGaAs/InP double heterojunction bipolar transistor (DHBT). Parasitic parameters of access via and electrode finger are extracted by 3-D electromagnetic (EM) simulation. By analyzing the equivalent circuit of seven special structu...
作者:... Ningke Hu , Wei Cheng , Bojie Fu
来源:[J].Landscape Ecology(IF 2.897), 2017, Vol.32 (6), pp.1181-1199Springer
摘要:Human demands for ecosystem services (ES) have tremendously changed the landscape and led to degradation of ecosystems and associated services. The resolving of current eco-environmental problems calls for better understanding of the spatially explicit ES interactions to guide ta...
作者:... Kao-Ping Guan , Zhen Zhang , Wei Cheng
来源:[J].Surgical Endoscopy(IF 3.427), 2017, Vol.31 (10), pp.4326-4330Springer
摘要:The repair of anorectal malformation (ARM) with low recto-bulbar fistula (bowel-to-skin distance: 1–1.5 cm) is contraindicated for laparoscopy due to the difficulty in exposing the fistulae. Posterior or anterior sagittal anorectoplasty is thus conventionally carried out for...
作者:Wei Cheng , Xinmin Li ...
来源:[J].Microchimica Acta(IF 3.434), 2017, Vol.184 (7), pp.2465-2471Springer
摘要:A sensitive and specific bioassay based on cyclic enzymatic amplification was developed for determination of microRNA (miRNA) by taking advantage of the exodeoxyribonuclease activity of T7 exonuclease (T7 Exo). In the presence of miRNA, DNA/RNA duplexes are formed by hybridi...
作者:... Hui Wang , Wei Cheng , Li Rao
来源:[J].The International Journal of Cardiovascular Imaging(IF 2.648), 2017, Vol.33 (5), pp.623-633Springer
摘要:In this study, the left atrial appendage (LAA) structure and morphology were assessed using real-time three-dimensional transesophageal echocardiography (RT3D-TEE) and enhanced cardiac computed tomography (CT) scanning, and the two measurements obtained using these different...
作者:... Xing Dai , Chengling Pan , Wei Cheng
来源:[J].Russian Journal of Physical Chemistry A(IF 0.386), 2017, Vol.91 (12), pp.2425-2430Springer
摘要:First-principles calculations are performed to investigate the crystal and electronic structures of BiOF crystal and its oxygen vacancy BiO7/8F. By analyzing the energy band structures, the total density of states and the partial densities of states, it is found that t...
作者:Piermarco Cannarsa , Wei Cheng
来源:[J].Calculus of Variations and Partial Differential Equations(IF 1.236), 2017, Vol.56 (5)Springer
摘要:For autonomous Tonelli systems on \(\mathbb {R}^n\) , we develop an intrinsic proof of the existence of generalized characteristics using sup-convolutions. This approach, together with convexity estimates for the fundamental solution, leads to new results such as the global propa...
作者:Wei Cheng
来源:[J].Boundary Value Problems(IF 0.922), 2017, Vol.2017 (1), pp.1-11Springer
摘要:Abstract(#br)This paper investigates a radially symmetric inverse heat conduction problem, which determines the internal surface temperature distribution of the hollow sphere from measured data at the fixed location inside it. This is an inverse and ill-posed problem. A cond...
作者:Wei Cheng , Jiafa Xu ...
来源:[J].Advances in Difference Equations(IF 0.76), 2019, Vol.2019 (1), pp.1-22Springer
摘要:Abstract(#br)In this paper we use the fixed point index and nonnegative matrices to study the existence of positive solutions for a class of fractional difference systems with coupled boundary conditions.
作者:Wei Cheng , Jiafa Xu ...
来源:[J].Advances in Difference Equations(IF 0.76), 2019, Vol.2019 (1), pp.1-22DOAJ
摘要:Abstract In this paper we use the fixed point index and nonnegative matrices to study the existence of positive solutions for a class of fractional difference systems with coupled boundary conditions.

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