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Multi-peak spectrum of KML Ti:sapphire pulse

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Chinese Science Bulletin 1999年第8期44卷 690-694页

作者： Shanghong Zhao Yishan wang Guofu Chen xianhua wang Xun Hou Chinese Acad Sci Xian Inst Opt & Precis Mech State Key Lab Transient Opt & Technol Xian 710068 Peoples R China

The multi-peak spectrum of Ti: sapphire pulses observed experimentally under ultra-broad bandwidth conditions ( < 15 fs pulse length) has been explained theoretically. It is shown that the self-phase-modulation effect is equivalent to the process of degenerate four-wave frequency-mixing. Based on this theoretical underpinning, the presence or absence of a multipeak spectrum provides a practical measure of whether the intracavity group-velocity-dispersion is ideally compensated for or not.

关键词： Ti: sapphire self-mode-locking multi-peak spectrum self-phase-modulation four-wave frequency-mixing.

Regulation of superoxide flashes by transient and steady mitochondrial calcium elevations

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Science China(Life Sciences) 2014年第5期57卷 495-501页

作者： JIAN ChongShu HOU TingTing YIN RongKang CHENG HePing wang xianhua State Key Laboratory of Biomembrane and Membrane Biotechnology Beijing Key Laboratory of Cardiometabolic Molecular MedicineInstitute of Molecular MedicinePeking-Tsinghua Center for Life SciencesPeking University

The mitochondria play essential roles in both intracellular calcium and reactive oxygen species *** a newly discovered universal and fundamental mitochondrial phenomenon,superoxide flashes reflect transient bursts of superoxide production in the matrix of single *** and how the superoxide flash activity is regulated by mitochondrial calcium remain largely *** we demonstrate that elevating mitochondrial calcium either by the calcium ionophore ionomycin or by increasing the bathing calcium in permeabilized HeLa cells increases superoxide flash incidence,and inhibition of the mitochondrial calcium uniporter activity abolishes the flash ***,the superoxide flash incidence is correlated to the steady-state mitochondrial calcium elevation with 1.7-fold increase per 1.0?F/F0 of Rhod-2 *** contrast,large mitochondrial calcium transients(e.g.,peak△F/F0~2.8,duration^2 min)in the absence of steady-state elevations failed to alter the flash *** results indicate that physiological levels of sustained,but not transient,mitochondrial calcium elevation acts as a potent regulator of superoxide flashes,but its mechanism of action likely involves a multi-step,slow-onset process.

关键词： superoxide flash calcium signaling reactive oxygen species (ROS) mitochondrion

Thirty years of Ca2+ spark research: digital principle of cell signaling unveiled

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Biophysics Reports 2024年第5期10卷 259-265页

作者： Fujian Lu Pengcheng Yang Donghui Zhang xianhua wang Heping Cheng Department of Cardiology Zhongshan Hospital Institutes of Biomedical Sciences Fudan University Shanghai Institute of Cardiovascular Diseases State Key Laboratory of Biocatalysis and Enzyme Engineering School of Life Science Hubei University National Biomedical Imaging Center State Key Laboratory of Membrane Biology Peking-Tsinghua Center for Life Sciences College of Future Technology Peking University

Calcium ions(Ca2+) are an archetypical and most versatile second messenger in virtually all cell *** by the discovery of Ca2+sparks in the 1990s,vibrant research over the last three decades has unveiled a constellation of Ca2+microdomains as elementary events of Ca2+signaling and,more importantly,a digital-analog dualism as the system design principle of Ca2+*** this brief review,we present a sketchy summary on advances in the field of sparkology,and discuss how the digital subsystem can fulfill physiological roles otherwise impossible for any analog *** addition,we attempt to address how the digital-analog dualism endows the simple cation messenger with signaling speediness,specificity,efficiency,stability,and unparalleled versatility.

关键词： Ca2+ signaling Ca2+ microdomain Digital system design

Wonderful Wuqiao Acrobatics

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China Today 1995年第5期44卷 69-70,73-77页

作者： $$$$wang xianhua

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Research on the technology of femtosecond laser micromachining based on image edge tracing

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Chinese Science Bulletin 2010年第9期55卷 879-883页

作者： Zhang DongShi Chen Feng Liu HeWei wang xianhua Du Kai Si JinHai Hou Xun Xi An Jiao Tong Univ Sch Elect & Informat Engn Shaanxi Key Lab Photon Technol Informat Xian 710049 Peoples R China

Aiming at fabrication of complex microstructures and micro-patterns, a kind of femtosecond laser micromachining technology based on the BMP image edge tracing was proposed. We introduced the general principle of this technology and discussed the implementation of the machining paths extraction, optimization, tracing and the feedback of the machining procession in detail. On the basis of this technology, control software for femtosecond laser micromachining was developed. Furthermore, we have accomplished the fabrication of complicated two-dimensional (2D) micro-patterns on a copper thin film. The results indicate that this technology can be used for digital control micromachining of complex patterns or microstructures at micron and submicron scales by femtosecond laser.

关键词： femtosecond laser image edge detection micromachining micro-pattern

Improved slagging characteristics of low-value solid waste fuel asphalt rock by mineral additives of CaCO₃, MgO, and Kaolin under fluidized bed condition

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WASTE DISPOSAL & SUSTAINABLE ENERGY 2024年第3期6卷 385-400页

作者： Xiang, Jiatao Zhang, Xiong Yi, Fan Zhang, Shihong Yang, Haiping Shao, Jing'ai wang, xianhua Chen, Hanping Huazhong Univ Sci & Technol Sch Energy & Power Engn State Key Lab Coal Combust Wuhan 430074 Peoples R China Huazhong Univ Sci & Technol Sch Energy & Power Engn Dept New Energy Sci & Engn Wuhan 430074 Peoples R China

As a low-value solid waste fuel, asphalt rock is prone to slagging even under fluidized bed condition. The purpose of this study is to improve the slagging characteristics of asphalt rock by adding the mineral additives CaCO3, MgO, and Kaolin. The results showed that the K, Al, Ca salts in asphalt rock ash will evolve at different temperatures and exist mainly as K2SO4, KAlSiO4, Al2O3SiO2, Al2O3, CaSO4, and CaSiO3. The CaSO4 formed from sulfur oxides and calcium-containing compounds is the main factor in asphalt rock slagging and can be facilitated by CaSiO3 with a small amount of CaCO3. The MgO can form MgCa(SiO3)(2) with a high melting point and helps raise the ash fusion temperatures. In addition, the Kaolin will promote the formation of low-temperature eutectics, resulting in a slight decrease in ash fusion temperatures. Through optimization, it was found that with the addition of 9.0% MgO+9.0% Kaolin+2.0% CaCO3 (in weight), the slagging ratio and pressure difference of asphalt rock under fluidized bed conditions decreased from 6.5% to 4.2% and from 6.0 Pa to 4.0 Pa, respectively. By combining simulation and experimental methods, it has been shown that appropriate mineral additives of CaCO3, MgO, and Kaolin can effectively improve the slagging characteristics of asphalt rock.

关键词： Asphalt rock Mineral additives Slagging ratio Pressure difference Fluidized bed

Survival and associated mortality risk factors among post-treatment pulmonary patients in the northwest of china

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Survival and associated mortality risk factors among post-tr...

Physical Simulation of Small-bore Copper-vapor Laser

第十二届全国营养科学大会

作者： wang xianhua 青岛大学医学院

Objectives The tuberculosis(TB)programme is the changji zone of the northwest of *** Observed Treatment,Short-Course(DOTS)is a modern control strategy against the tuberculosis recommended by World Health *** the launc...

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Chinese Journal of Lasers 1999年第1期8卷 22-29页

作者： YU Deli TAO Yongxiang YIN xianhua wang Runwen CHEN Lin YANG Yan LI Hailan (Shanghai Institute of Optics and Fine Mechanics, The Chinese Academy of Sciences, Shanghai 201800, China) 中科院上海光学精密机械所上海

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关键词： Copper vapor laser (CVL) kinetic model computer simulation thermal analysis

Research on Identification and Evaluation Technology and Management and Control System of Enterprise Major Risk Based on Preventing Serious Accidents

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Research on Identification and Evaluation Technology and Man...