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LINEARIZED OSCILLATIONS OF DELAY DIFFERENTIAL EQUATIONS AND APPLICATIONS

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Applied Mathematics:A Journal of Chinese Universities 1998年第4期 31-36页

作者： wang youbin, ZHAO AIMIN AND YAN JURANG

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Bi_(2)O_(3)/g-C_(3)N_(4)hollow core–shell Z-scheme heterojunction for photocatalytic uranium extraction

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Nano Research 2024年第7期17卷 5845-5855页

作者： Hao Fu Yuehua Pan Zhenyu Cai Yuxiang Deng Minchen Hou Yuezhou Wei Toyohisa Fujita Shunyan Ning youbin wang Shaolong Zhang Xinpeng wang School of Chemistry&Chemical Engineering Guangxi UniversityNanning 530004China School of Resources Environment and MaterialsGuangxi UniversityState Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite StructuresNanning 530004China College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China School of Materials Sun Yat-sen UniversityShenzhen 518107China School of Nuclear Science and Technology University of South ChinaHengyang 421001China

Photocatalytic uranium extraction from radioactive nuclear wastewater and seawater is critical for promoting the sustainable advancement of nuclear industry,but the complexity of real-world environments,particularly the occurrence of anoxic and oxygen-enriched states,presents significant challenges to effective uranium ***,a layered hollow core–shell structure of Bi_(2)O_(3)/g-C_(3)N_(4)Z-scheme heterojunction photocatalyst has been designed and successfully applied for photocatalytic uranium extraction in both aerobic and oxygen-free conditions,and the extraction efficiency of uranium can reach 98.4%and 99.0%,***,the photocatalyst still has ultra-high extraction efficiency under the influence of pH,inorganic ions,and other *** exceptional capability for uranium extraction is on the one hand due to the distinctive hollow core–shell architecture,which furnishes an abundant quantity of active *** the other hand,benefiting from the suitable band gap structure brought by the construction of Z-scheme heterojunction,Bi_(2)O_(3)/g-C_(3)N_(4)exhibits current densities(1.00μA/cm^(2))that are 5.26 and 3.85 times greater than Bi_(2)O_(3)and g-C_(3)N_(4),respectively,and the directional migration mode of Z-scheme carriers significantly prolongs the lifetime of photogenerated charges(1.53 ns),which separately surpass the pure samples by factors of 5.10 and ***,the reaction mechanism and reaction process of photocatalytic uranium extraction are investigated in the presence and absence of oxygen,respectively.

关键词： Bi_(2)O_(3)/g-C_(3)N_(4) Z-scheme photocatalytic uranium extraction

Advances in the pathogenesis and clinical application prospects of tumor biomolecules in keloid

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Burns & Trauma 2022年第1期10卷 432-451页

作者： Yijun Xia youbin wang Mengjie Shan Yan Hao Hao Liu Qiao Chen Zhengyun Liang Department of Plastic Surgery Peking Union Medical College HospitalChinese Academy of Medical SciencesPeking Union Medical CollegeBeijing 100730China Department of Plastic Surgery Peking Union Medical College HospitalBeijingChina

Keloid scarring is a kind of pathological healing manifestation after skin injury and possesses various tumor properties,such as the Warburg effect,epithelial-mesenchymal transition(EMT),expression imbalances of apoptosis-related genes and the presence of stem *** expression of tumor signatures is critical to the initiation and operation of these *** previous experimental studies have recognized the potential value of a single or several tumor biomolecules in keloids,a comprehensive evaluation system for multiple tumor signatures in keloid scarring is still *** paper aims to summarize tumor biomolecules in keloids from the perspectives of liquid biopsy,genetics,proteomics and epigenetics and to investigate their mechanisms of action and feasibility from bench to *** biopsy is suitable for the early screening of people with keloids due to its noninvasive and accurate *** biomarkers do not require changes in the gene sequence and their reversibility and tissue specificity make them ideal therapeutic ***,given the ethnic specificity and genetic predisposition of keloids,more large-sample multicenter studies are indispensable for determining the prevalence of these signatures and for establishing diagnostic criteria and therapeutic efficacy estimations based on these molecules.

关键词： Tumor signatures Keloid Proteome Epigenetics Exosomes Tumor biomolecules Biomarkers

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基于阵列波导光栅的高精度折射率传感器研究

光学学报 2009年第9期29卷 2378-2384页

作者：王有斌黄旭光华南师范大学光子信息技术广东省高校重点实验室广东广州510006

设计和研究了基于阵列波导光栅的高精度折射率传感器。该传感器利用阵列波导光栅的阵列波导区域对相位差敏感的特性,通过在阵列波导区域挖槽来测量通过沟槽的液体的折射率变化。由于阵列波导之间的相位差变化会导致输出波导的输入面的... 详细信息

设计和研究了基于阵列波导光栅的高精度折射率传感器。该传感器利用阵列波导光栅的阵列波导区域对相位差敏感的特性,通过在阵列波导区域挖槽来测量通过沟槽的液体的折射率变化。由于阵列波导之间的相位差变化会导致输出波导的输入面的最大光强位置的变化,所以通过入射窄带光源并计算其中两个输出波导的功率比的变化,就可以得到实时的折射率变化。利用傅里叶光学和光波动理论的方法建立数学模型,经过综合考虑各种因素,设计了合理的参数,通过拟合得到折射率变化和光功率比的解析式。这种方法能够有效地消除仪器的不稳定性、内部损耗和环境影响带来的测量误差,提高测量精度。

关键词：传感器阵列波导光栅折射率傅里叶光学

NECESSARY AND SUFFICIENT CONDITIONS FOR THE OSCILLATION OF A DELAY LOGISTIC EQUATION WITH CONTINUOUS AND PIECEWISE CONSTANT ARGUMENTS

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Annals of Differential Equations 2005年第3期21卷 435-438页

作者： wang youbin Yan Jurang Dept. of Math. Wenzhou Normal College Wenzhou 325000 Dept. of Math. Shanxi University Taiyuan 030006

In this paper, we obtain some necessary and sufficient conditions for the oscillation of all positive solutions of a delay Logistic equation with continuous and piecewise constant arguments about the positive equilibr... 详细信息

关键词： oscillation Logistic equation continuous and piecewise constant argument

Independent and Interactive Effects of Environmental Conditions on Aerosolized Surrogate SARS-CoV-2-Beijing,China,June to September 2020

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China CDC weekly 2022年第26期4卷 565-569,I0004,I0005页

作者： Yixin Mao Yueyun Luo Wenda Zhang Pei Ding Xia Li Fuchang Deng Kaiqiang Xu Min Hou Cheng Ding youbin wang Zhaomin Dong Raina MacIntyre Xiaoyuan Yao Song Tang Dongqun Xu China CDC Key Laboratory of Environment and Population Health National Institute of Environmental HealthChinese Center for Disease Control and PreventionBeijingChina Chinese Center for Disease Control and Prevention BeijingChina University of South Carolina ColumbiaSCUSA School of Space and Environment Beihang UniversityBeijingChina Beijing Advanced Innovation Center for Big Data-Based Precision Medicine Beihang UniversityBeijingChina The Kirby Institute Faculty of MedicineThe University of New South WalesSydneyNSWAustralia Center for Global Health School of Public HealthNanjing Medical UniversityNanjingJiangsu ProvinceChina

Summary What is already known about this topic?Environmental factors such as temperature and humidity play important roles in the transmission of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)via droplets/*** is added by this report?Higher relative humidity(61%–80%),longer spreading time(120 min),and greater dispersal distance(1 m)significantly reduced SARS-CoV-2 pseudovirus *** was an interaction effect between relative humidity and spreading *** are the implications for public health practice?The findings contribute to our understanding of the impact of environmental factors on the transmission of SARS-CoV-2 via airborne droplets/aerosols.

关键词： humidity finding interaction

A NEW OSCILLATION CRITERION FOR FIRST ORDER NEUTRAL DELAY DIFFERENTIAL EQUATION

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Annals of Differential Equations 2006年第3期22卷 473-476页

作者： Zhang Yongzhen wang youbin (College of Math, and Information Science, Wenzhou University, Wenzhou 325000)

In this paper, a new sufficient condition for the oscillation of all solutions of first order neutral delay differential equations is obtained. Secondly, the result can also be extended to a general neutral differenti... 详细信息

关键词： neutral delay differential equation oscillation characteristic equation

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基于ANSYS的端盖件模锻数值模拟分析

煤矿机械 2020年第6期41卷 107-109页

作者：王慧王友斌南京工程学院机械工程学院南京211167

为了提高大型高压容器一体化端盖件的成形质量,有必要研究其模锻成形过程中的金属流动规律以及载荷分布规律。采用ANSYS软件仿真分析了某型号端盖件模锻过程中的温度分布、晶粒尺寸分布以及晶粒再结晶分布情况,同时对比分析了内压圈压... 详细信息

为了提高大型高压容器一体化端盖件的成形质量,有必要研究其模锻成形过程中的金属流动规律以及载荷分布规律。采用ANSYS软件仿真分析了某型号端盖件模锻过程中的温度分布、晶粒尺寸分布以及晶粒再结晶分布情况,同时对比分析了内压圈压法兰工艺和外压圈压法兰工艺对锻造质量的影响,为模具结构尺寸的优化提供依据。

关键词：端盖件模锻工艺模具载荷

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氧化硅在改善双极型晶体管特性上的作用

半导体技术 2008年第2期33卷 144-146页

作者：王友彬汪辉上海交通大学微电子学院 200030

提出了一种改善npn和横向pnp晶体管放大倍数、扩散致窄电阻(受EB和CB结结深影响的基区电阻)阻值而又不影响其他器件特性的方法。不连续的SiOx可以作为宽禁带半导体材料加在多晶硅和单晶硅的界面处来提高横向pnp晶体管的放大倍数,使其从... 详细信息

提出了一种改善npn和横向pnp晶体管放大倍数、扩散致窄电阻(受EB和CB结结深影响的基区电阻)阻值而又不影响其他器件特性的方法。不连续的SiOx可以作为宽禁带半导体材料加在多晶硅和单晶硅的界面处来提高横向pnp晶体管的放大倍数,使其从目前的23提高到30;连续的SiOx作为优秀的绝缘材料覆盖在发射极多晶硅表面,可以确保As在快速热处理后的分布,结果表明npn型晶体管的放大倍数从170降低到110的同时增加了扩散致窄电阻的阻值。这种方法的优点在于利用了极易制造的SiOx改善了半导体器件特性,具有极高的实际应用价值。

关键词：氧化硅双极型晶体管放大倍数