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Hydrolysis kinetics of benzyl phenyl ether in high temperature liquid water

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Chinese Chemical Letters 2011年第6期22卷 733-737页

作者： xiao yu wu Xiu Yang Lu Department of Chemical and Biological Engineering Zhejiang University Hangzhou 310027 China

The application of high temperature liquid water（HTLW） to decomposition of lignin as efficient and green solution for phenolic compounds recovery was *** phenyl ether（BPE）,the lignin model compound,was treated at temperatures ranging from 220 to 250℃.BPE undergo hydrolysis in HTLW,and main products were phenol and benzyl alcohol with the minimum selectivities of 75.7%and 82.8%,*** temperature led to higher selectivity in 220-250℃temperature *** kinetics on BPE hydrolysis was studied and the activation energy was determined as 150.3±12.5 kJ/mol with the first-order kinetic *** on products distribution,the reaction mechanism for decomposition of benzyl phenyl ether was *** investigated process provides insights into the design of a commercial method for utilization of lignin.

关键词： Hydrolysis Kinetics Benzyl phenyl ether High temperature liquid water Lignin model compound

Graphene quantum dots modulated solution-derived InGaO thin-film transistors and stress stability exploration

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Rare Metals 2023年第7期42卷 2294-2306页

作者： xiao-Fen Xu Gang He Lei-Ni Wang Wen-Hao Wang xiao-yu wu School of Materials Science and Engineering Anhui UniversityHefei230601China

Graphene quantum dots(GQDs)doped InGaO(IGO)thin film transistors(TFTs)have been fabricated based on solution-driven ZrO_(x) as gate *** to pure IGO TFTs,superior electrical performance of the GQDs-IGO TFTs can be achieved by adjusting the doping *** has been demonstrated that GQDs-modified IGO TFTs devices with GQDs doping content of0.3 mg·ml^(-1)have the optimized performances,including field-effect mobility(μ_(FE))of 22.02 cm^(2)·V^(-1)·s^(-1),on/off current ratio(I_(on)/I_(off))of 7.06×10^(7),subthreshold swing(SS)of 0.09 V·dec^(-1),hysteresis of 0.04 V and interfacial trap states(D_(it))of 1.03×10^(12)cm^(-2).In addition,bias stress and illumination stress tests have been performed and excellent stability has been achieved for optimized *** GQDs-IGO TFTs device showed smaller threshold voltage shift of 0.12 and 0.04 V under positive bias stress(PBS)test and negative bias stress(NBS)test for 3600 s,*** it showed smaller threshold voltage shift of 0.27 and 0.34 V for red light under the PBS and NBS test for 3600 s,***,it showed smaller threshold voltage shift of0.20 and 0.22 V for green light under PBS and NBS test for3600 s,*** also showed smaller threshold voltage shift of 0.17 and 0.12 V for blue under the positive bias illumination stress(PBIS)test and negative bias illumination stress(NBIS)test for 3600 s,*** noise(LFN)characteristics of GQDs-IGO/ZrO_(x)TFTs indicated that the noise source came from the fluctuations in ***,a low voltage resistor-loaded unipolar inverter has been built based on GQDs-IGO/ZrO_(x)TFT,demonstrating good dynamic response behavior and a maximum gain of *** experimental results have suggested that solution-processed GQDs-IGO/ZrO_(x)TFT may envision potential applications in low-cost and large-area electronics.

关键词： Graphene quantum dots doped InGaO(GQDs-IGO) Thin-film transistors Stability Inverter Low-frequency noise

Epidemic Spread in Networks Induced by Deactivation Mechanism

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Communications in Theoretical Physics 2008年第5期49卷 1357-1360页

作者： yu xiao-Ling wu xiao ZHANG Duan-Ming LI Zhi-Hao LIANG Fang WANG xiao-yu Department of Physics Huazhong University of Science and Technology Wuhan 430074 China

We have studied the topology and epidemic spreading behaviors on the networks in which deactivation mechanism and long-rang connection are coexisted. By means of numerical simulation, we find that the clustering coefficient C and the Pearson correlation coefficient r decrease with increasing long-range connection μ and the topological state of the network changes into that of BA model at the end （when μ = 1）. For the Susceptible-Infect-Susceptible model of epidemics, the epidemic threshold can reach maximum value at μ = 0.4 and presents two different variable states around μ= 0.4.

关键词： epidemic threshold deactivation mechanism long-rang connection

Rogue Waves for a (2+1)-Dimensional Coupled Nonlinear Schr?dinger System with Variable Coefficients in a Graded-Index Waveguide

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Communications in Theoretical Physics 2018年第5期69卷 551-557页

作者： Zhong Du Bo Tian xiao-yu wu and yu-Qiang yuan State Key Laboratory of Information Photonics and Optical Communications and School of Science Beijing University of Posts and Telecommunications Beijing 100876 China

Studied in this paper is a(2+1)-dimensional coupled nonlinear Schr?dinger system with variable coefficients,which describes the propagation of an optical beam inside the two-dimensional graded-index waveguide amplifier with the polarization effects. According to the similarity transformation, we derive the type-Ⅰ and type-Ⅱ rogue-wave solutions. We graphically present two types of the rouge wave and discuss the influence of the diffraction parameter on the rogue *** the diffraction parameters are exponentially-growing-periodic, exponential, linear and quadratic parameters, we obtain the periodic rogue wave and composite rogue waves respectively.

关键词： graded-index waveguide (2+l)-dimensional coupled nonlinear Schrodinger system similarity transformation rogue waves variable coefficients

From seawater to hydrogen via direct photocatalytic vapor splitting: A review on device design and system integration

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Frontiers in Energy 2024年第3期18卷 291-307页

作者： Hongxia LI Khaja WAHAB AHMED Mohamed A.ABDELSALAM Michael FOWLER xiao-yu wu Technology Innovation Institute Masdar CityAbu Dhabi 9639United Arab Emirates Department of Chemical Engineering University of WaterlooWaterlooON N2L 3G1Canada Department of Mechanical and Nuclear Engineering Khalifa University of Science and TechnologyAbu Dhabi 127788United Arab Emirates Department of Mechanical and Mechatronics Engineering University of WaterlooWaterlooON N2L 3G1Canada

Solar-driven hydrogen production from seawater attracts great interest for its emerging role in decarbonizing global energy consumption. Given the complexity of natural seawater content, photocatalytic vapor splitting offers a low-cost and safe solution, but with a very low solar-to-hydrogen conversion efficiency. With a focus on cutting-edge photothermal–photocatalytic device design and system integration, the recent research advances on vapor splitting from seawater, as well as industrial implementations in the past decades were reviewed. In addition, the design strategies of the key processes were reviewed, including vapor temperature and pressure control during solar thermal vapor generation from seawater, capillary-fed vaporization with salt repellent, and direct photocatalytic vapor splitting for hydrogen production. Moreover, the existing laboratory-scale and industrial-scale systems, and the integration principles and remaining challenges in the future seawater-to-hydrogen technology were discussed.

关键词： seawater hydrogen photocatalytic vapor splitting solar-driven

Groupoids,Discrete Mechanics,and Discrete Variation

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Communications in Theoretical Physics 2008年第9期50卷 545-550页

作者： GUO Jia-Feng JIA xiao-yu wu Ke ZHAO Wei-Zhong School of Mathematical Science Capital Normal University Beijing 100037 China

After introducing some of the basic definitions and results from the theory of groupoid and Lie algebroid,we investigate the discrete Lagrangian mechanics from the viewpoint of groupoid theory and give the connection ... 详细信息

关键词： groupoids Lie algebroids discrete field discrete variational principle

A Bregman-Style Improved ADMM and its Linearized Version in the Nonconvex Setting:Convergence and Rate Analyses

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Journal of the Operations Research Society of China 2024年第2期12卷 298-340页

作者： Peng-Jie Liu Jin-Bao Jian Hu Shao xiao-Quan Wang Jia-Wei Xu xiao-yu wu School of Mathematics Jiangsu Center for Applied MathematicsChina University of Mining and TechnologyXuzhou 221116JiangsuChina School of Mathematics and Physics Center for Applied Mathematics of GuangxiGuangxi Minzu UniversityNanning 530006GuangxiChina Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong KongChina School of Mathematics and Computational Science Xiangtan UniversityXiangtan 411105HunanChina

This work explores a family of two-block nonconvex optimization problems subject to linear *** first introduce a simple but universal Bregman-style improved alternating direction method of multipliers(ADMM)based on the iteration framework of ADMM and the Bregman ***,we utilize the smooth performance of one of the components to develop a linearized version of *** to the traditional ADMM,both proposed methods integrate a convex combination strategy into the multiplier update *** each proposed method,we demonstrate the convergence of the entire iteration sequence to a unique critical point of the augmented Lagrangian function utilizing the powerful Kurdyka–Łojasiewicz property,and we also derive convergence rates for both the sequence of merit function values and the iteration ***,some numerical results show that the proposed methods are effective and encouraging for the Lasso model.

关键词： Nonconvex optimization Alternating direction method of multipliers Kurdyka-Lojasiewicz property Convergence rate

T1 rectal mucinous adenocarcinoma with bilateral enlarged lateral lymph nodes and unilateral metastasis:A case report

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World Journal of Clinical Cases 2022年第33期10卷 12404-12409页

作者： Xian-Wei Liu Bing Zhou xiao-yu wu Wen-Bing yu Ren-Fang Zhu Department of General Surgery Jiujiang No.1 People’s HospitalJiujiang 332000Jiangxi ProvinceChina Department of Pathology Jiujiang No.1 People’s HospitalJiujiang 332000Jiangxi ProvinceChina

BACKGROUND There are a few cases of lateral lymph node(LLN)metastasis(LLNM)of T1 rectal ***,LLNM is easily missed,especially in patients with early-stage rectal *** our knowledge,the possibility of bilateral LLNM before surgery has not been reported in previous *** SUMMARY A 36-year-old woman underwent endoscopic submucosal dissection at a local hospital owing to a clinical diagnosis of a rectal *** pathology report showed a diagnosis of T1 rectal mucinous *** was considered to have bilateral LLNM after the examination at our *** total mesorectal excision plus bilateral LLN dissection was performed and the pathological outcomes indicated unilateral *** patient received longcourse adjuvant chemoradiotherapy with no recurrence or metastasis observed during the 1-year follow-up *** T1 rectal cancer could lead to LLNM and possibly,bilateral ***,adequate clinical evaluation is essential for these patients.

关键词： T1 rectal cancer Lateral lymph node metastasis Lateral lymph node dissection Brief literature review Endoscopic submucosal dissection Case report

Research and development of a 0.5-m-long helical superconducting undulator prototype

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Nuclear Science and Techniques 2024年第10期35卷 86-95页

作者： Xiang-Chen Yang xiao-wu yu Jun-Hao Wei Xiang-Zhen Zhang Zi-Lin Chen xiao-Juan Bian He-Ting Li Guang-Yao Feng yu-Hui Li National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Institute of Plasma Physics Chinese Academy of Sciences(ASIPP)Hefei 230031China China Spallation Neutron Source Institute of High Energy PhysicsChinese Academy of SciencesDongguan 523000China

The helical undulator is in high demand in synchrotron radiation facilities for circular polarization *** to the higher field strength provided by the superconducting undulator compared to the conventional permanent-magnet undulator,greater research efforts should be directed toward this *** helical superconducting undulator holds great potential in synchrotron radiation facilities,especially in low-energy storage rings that seek circularly polarized radiation with the highest possible radiation *** the successful development of planar superconducting undulators,the Institute of High Energy Physics conducted research and development for the helical superconducting undulator.A 0.5-m-long Deltatype superconducting undulator prototype was developed and *** information on the design,fabrication,and cryogenic testing of the prototype is presented and discussed.

关键词： Helical Superconducting undulator Delta