(超)宽禁带功率半导体中的欧姆接触电阻:从基础物理到界面工程
近日,斯洛伐克科技大学Martin Weis团队在宽禁带与超宽禁带功率半导体欧姆接触电阻研究方面取得系统性进展。
CHAPTER IV 第四章
CHAPTER IV CHAPTER IV 第四章 From my discourse with Mr.
人肉机器人的黄昏
我先读一下 frontend-design skill,因为这是个大型文章输出任务——不对,文章要直接在 chat 输出,plain text 格式。让我直接开写。这篇文章体量很大,我会分段连续输出。
某汽车研究院GD&T内部培训教材,赶紧收藏
GD&T是产品实现过程的重要工具,广泛地应用于设计和质量部门,包括机械图纸的读图、解释和理解,是实现和理解客户要求的专业语言。
IB数学AA&AI | 三张paper四门选课五大topic,考点都是怎么分布的?
IB数学自改革后,统一分为了AA分析数学(Analysis and approaches)和AI应用数学(Applications and interpretation)两个方向。
《自然》(20220721出版)一周论文导读
Abstract:Here we report the observation of a distinct type of non-equilibrium state of matter, Floquet symmetry-protected topological phases, which are implemented through digital quantum simulation with an array of programmable superconducting qubits. We observe robust long-lived temporal correlations and subharmonic temporal response for the edge spins over up to 40 driving cycles using a circuit of depth exceeding 240 and acting on 26 qubits. We demonstrate that the subharmonic response is independent of the initial state, and experimentally map out a phase boundary between the Floquet symmetry-protected topological and thermal phases. Our results establish a versatile digital simulation approach to exploring exotic non-equilibrium phases of matter with current noisy intermediate-scale quantum processors.
NTC进入SMD时代,精勤贴片热敏获客户认可大批量出货
前言热敏电阻是一种特殊类型的电阻器件,其阻值会随着温度的变化而变化。
【妇产学术】段华教授团队在《Reprod Biomed Online》期刊发文探讨铁死亡抵抗相关分子在子宫内膜异位症中的诊断价值
段华教授团队在妇产科领域权威杂志《Reprod Biomed Online》期刊发文探讨铁死亡抵抗相关分子在子宫内膜异位症中的诊断价值。
《自然》(20220120出版)一周论文导读
For decades we have known that the Sun lies within the Local Bubble, a cavity of low-density, high-temperature plasma surrounded by a shell of cold, neutral gas and dust. However, the precise shape and extent of this shell, the impetus and timescale for its formation, and its relationship to nearby star formation have remained uncertain, largely due to low-resolution models of the local interstellar medium. Here we report an analysis of the three-dimensional positions, shapes and motions of dense gas and young stars within 200 pc of the Sun, using new spatial and dynamical constraints. We find that nearly all of the star-forming complexes in the solar vicinity lie on the surface of the Local Bubble and that their young stars show outward expansion mainly perpendicular to the bubble’s surface. Tracebacks of these young stars’ motions support a picture in which the origin of the Local Bubble was a burst of stellar birth and then death taking place near the bubble’s centre beginning approximately 14 Myr ago. The expansion of the Local Bubble created by the supernovae swept up the ambient interstellar medium into an extended shell that has now fragmented and collapsed into the most prominent nearby molecular clouds, in turn providing robust observational support for the theory of supernova-driven star formation.