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Potassium ions and cyano group modified g-C3N4 for effective generation of H2O2 through two-electron oxygen reduction

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Science China Chemistry 2025年第1期 192-200页

作者： Dongying Wang Shulan pu Yongmin Chen Ke Lei Yujie Duan Linjiao Mao Xuhui Zeng Xi Luo Yuntao Zhang Yuqin Dong Jin Zhong Zhang yan Sun School of Mechanical Engineering Chengdu University Department of Chemistry and Biochemistry University of California

Potassium ions （K+） doped graphitic carbon nitride （g-C3N4） was prepared by a thermal etching method using potassium hydroxide （KOH） as an ion *** transform infrared spectroscopy （FTIR） and X-ray photoelectron spectroscopy （XPS）results showed that the generation of the cyano group was detected while introducing K+.Under simulated sunlight irradiation,the sample with a K+doping amount of 10%showed the highest hydrogen peroxide （H2O2） generation rate of2,140.2μmol *** apparent quantum yield （AQY） at 400 nm and the solar-to-chemical conversion （SCC） are 4.35%and1.23%,respectively.K+acted as a bridge between g-C3N4layers,which enhanced charge transfer ***,the cyano group enhanced the adsorption capacity of protons （H+） and promoted the yield of *** catalyst exhibited excellent photocatalytic stability based on four-cycle *** addition,a mechanism study showed that superoxide radicals （·O2-）were the most important active species in the reaction *** production of H2O2was achieved through consecutive single-electron *** study deepens the understanding of the oxygen reduction reaction process and opens up a new venue for improving H2O2generation.

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基于惩罚回归样条的积分近似计算与应用

大学数学 2015年第2期31卷 56-60页

作者：严恒普杨联强戴习民安徽大学数学科学学院安徽合肥230601 合肥工业大学数学学院安徽合肥230009

提出一种利用惩罚回归样条拟合被积函数f(x),从而计算复杂积分∫baf(x)dx的新方法.在仅知f(x)带随机扰动的离散数据点集的情况下,利用基于截断幂形式的样条基函数,通过惩罚样条回归,给出函数的多项式拟合结果,再根据该多项式形式便捷计... 详细信息

提出一种利用惩罚回归样条拟合被积函数f(x),从而计算复杂积分∫baf(x)dx的新方法.在仅知f(x)带随机扰动的离散数据点集的情况下,利用基于截断幂形式的样条基函数,通过惩罚样条回归,给出函数的多项式拟合结果,再根据该多项式形式便捷计算出积分.模拟和实际应用结果显示该方法计算简单快捷,并具有较好的准确度.

关键词：惩罚样条积分计算回归

Maintaining moderate levels of hypochlorous acid promotes neural stem cell proliferation and differentiation in the recovery phase of stroke

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Neural Regeneration Research 2025年第3期20卷 845-857页

作者： Lin-yan Huang Yi-De Zhang Jie Chen Hai-Di Fan Wan Wang Bin Wang Ju-Yun Ma Peng-Peng Li Hai-Wei pu Xin-Yian Guo Jian-Gang Shen Su-Hua Qi School of Medical Technology Xuzhou Key Laboratory of Laboratory DiagnosticsXuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Pharmacy Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina Department of Laboratory Medicine Branch Hospital of Huai’an First People’s HospitalHuai’anJiangsu ProvinceChina Department of Laboratory Medicine the Affiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Chinese Medicine The University of Hong KongHong Kong Special Administrative RegionChina

It has been shown clinically that continuous removal of ischemia/reperfusion-induced reactive oxygen species is not conducive to the recovery of late ***,previous studies have shown that excessive increases in hypochlorous acid after stroke can cause severe damage to brain *** previous studies have found that a small amount of hypochlorous acid still exists in the later stage of stroke,but its specific role and mechanism are currently *** simulate stroke in vivo,a middle cerebral artery occlusion rat model was established,with an oxygen-glucose deprivation/reoxygenation model established in vitro to mimic *** found that in the early stage(within 24 hours)of ischemic stroke,neutrophils produced a large amount of hypochlorous acid,while in the recovery phase(10 days after stroke),microglia were activated and produced a small amount of hypochlorous ***,in acute stroke in rats,hypochlorous acid production was prevented using a hypochlorous acid scavenger,taurine,or myeloperoxidase inhibitor,4-aminobenzoic acid *** results showed that high levels of hypochlorous acid(200μM)induced neuronal apoptosis after oxygen/glucose deprivation/***,in the recovery phase of the middle cerebral artery occlusion model,a moderate level of hypochlorous acid promoted the proliferation and differentiation of neural stem cells into neurons and *** suggests that hypochlorous acid plays different roles at different phases of cerebral ischemia/reperfusion *** levels of hypochlorous acid(5 and 100μM)promoted nuclear translocation ofβ-*** transfection of single-site mutation plasmids,we found that hypochlorous acid induced chlorination of theβ-catenin tyrosine 30 residue,which promoted nuclear ***,our study indicates that maintaining low levels of hypochlorous acid plays a key role in the recovery of neurological function.

关键词： cell differentiation cerebral ischemia/reperfusion injury chlorination hypochlorous acid microglia neural stem cell neurogenesis nuclear translocation stroke β-catenin

ARCS动机设计模型在中学语文课堂教学中的效度分析

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首都师范大学学报（社会科学版） 2000年第5期 106-111页

作者：罗峥郭德俊袁艳丽邹恒璞首都师范大学教育科学学院北京100089 首都师范大学附属育新学校北京100096

本研究旨在探讨ARCS动机设计模型在我国课堂教学中的适用性和有效性。采用定量研究与定性研究相结合、前后测现场教学实验的方法 ,在不中断正常教学秩序的前提下 ,进行了语文课ARCS动机设计模型的教学干预 ,为期四个月。教学实验班分别... 详细信息

本研究旨在探讨ARCS动机设计模型在我国课堂教学中的适用性和有效性。采用定量研究与定性研究相结合、前后测现场教学实验的方法 ,在不中断正常教学秩序的前提下 ,进行了语文课ARCS动机设计模型的教学干预 ,为期四个月。教学实验班分别为初一年级两个班和高一年级一个班。结果表明 ,ARCS动机设计模型能被中学语文教师有效采纳 ;在中学语文教学中 ,ARCS动机设计模型的有效性具有一定的年级差异 :它能提高初中生的学习动机、学习的努力程度 ,提高学生的学习成绩 ,改善差生的学习状况 ;在高中语文教学中。

关键词： ARCS动机设计模型中学语文课堂教学学习动机效度教学策略

Experimental Study for Effect of Multi-Site Spark Ignition on Dedicated Hybrid Engine Performance under High Dilution Condition

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Journal of Thermal Science 2025年第1期 254-267页

作者： yan Bowen WATERS Benjamin HAINES Andrew MCGHEE Mike HU Tiegang DENG Wei pu Yongxian MA Tianyu Powertrain Engineering R&D Center Chongqing Changan Automobile Co.Ltd. Changan UK R&D Centre Limited

In this study,a triple spark ignition scheme was first designed on a three-cylinder 1.5-L dedicated hybrid engine（DHE）.On this basis,the effect of different ignition modes on engine combustion and emission characteristics was studied,especially under high dilution *** results tested at 2000 r/min and 0.8 MPa BMEP（brake mean effective pressure） show that with highly increased in-cylinder flow intensity,using only passive prechamber（PPC） has a lower lean limit than that with single central spark plug（CSP）,thereby leading to slightly higher minimum fuel consumption and nitrogen oxides（NOx） *** side spark plugs（SSP）based on PPC can result in improved capability of lean limit extension and engine performance than ***,the improvement level is lower than that with triple spark plugs（TSP）.As the excess air ratio λincreases,the advantage of PPC and PPC with SSP in improving the combustion phasing compared with CSP gradually ***,the increasing tendency of their ignition delay and combustion duration is more *** added SSP based on PPC can effectively shorten the ignition delay of leaner mixture,but the combustion duration can be only slightly *** a result,under extremely lean condition,the advantage of PPC and PPC with SSP in terms of combustion characteristics over CSP becomes much *** contrast,the TSP ignition can achieve much shorter ignition delay and combustion duration simultaneously under this *** to the highest available dilution level,the TSP ignition achieves the lowest raw ***,it can also reduce the raw carbon monoxide（CO） and hydrocarbons（HC） emissions compared to CSP due to a more thorough combustion of the end gas *** on the excellent performance of TSP,the highest engine brake thermal efficiency（BTE） was further *** results show that with normal RON 92 fuel,the engine finally achieved 43.69% and 45.02% BTE under stochiometric mode with exhaust

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Simulation on Evaporation and Motion of Atomized Droplets in Spray Dry Flue Gas Desulfurization Tower

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Journal of Thermal Science 2022年第6期31卷 2252-2263页

作者： ZHANG Tengfei TANG Qiang pu Chao yan Yunfei Key Laboratory of Low-grade Energy Utilization Technologies and Systems Ministry of EducationChongqing UniversityChongqing400044China

The evaporation and motion of atomized droplets have an essential effect on the safe and efficient long-term operation of the desulphurization tower. Therefore, the two-phase flow model is established and solved by three-dimensional steady Reynolds-averaged Navier-Stokes equations;the droplets are tracked by Eulerian-Lagrangian method. The three factors, including inlet swirling flow of flue gas, initial droplet diameter, and inlet flue gas temperature, are analyzed to show the effects on the evaporation and motion of atomized droplets, respectively. The results show that the swirling flow of flue gas and initial droplet diameter dominate the penetration length of the atomized droplets and the mixing characteristic of droplets and flue gas. With the increase of droplet diameter, the length of droplet penetrating flue gas increases. When droplet diameter is 200 μm and inlet swirl number is 0.35, droplets completely penetrate the core area. Therefore, this is the maximum initial droplet diameter at the inlet swirl number of 0.35. The droplets evaporation time of initial 150 μm diameter is 85.5% longer than that of 50 μm droplets(0.35 of inlet swirl number). Increasing the inlet flue gas temperature can enhance the heat transfer. When inlet flue gas temperature rises from 483 K to 523 K, the evaporation time decreases by 33.8%. The results can be used to guide the optimization of droplets spray evaporation under practical operating conditions in the desulfurization tower.

关键词： spray dry FGD atomized droplets swirling flow penetration length droplet evaporation

Functional Multiple-Outcome Model in Application to Multivariate Growth Curves of Infant Data

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Journal of Systems Science & Complexity 2021年第4期34卷 1555-1577页

作者： yan Xingyu ZHOU Yingchun pu Xiaolong ZHAO Peng School of Mathematics and Statistics Jiangsu Normal UniversityXuzhou 221116China Key Laboratory of Advanced Theory and Application in Statistics and Data Science-MOE School of StatisticsEast China Normal UniversityShanghai 200062China

Motivated by a medical study that attempts to analyze the relationship between growth curves and other variables and to measure the association among multiple growth curves,the authors develop a functional multiple-outcome model to decompose the total variation of multiple functional outcomes into variation explained by independent variables with time-varying coefficient functions,by latent factors and by *** latent factors are the hidden common factors that influence the multiple outcomes and are found through the combined functional principal component analysis *** the coefficients of the latent factors one may further explore the association of the multiple *** method is applied to the multivariate growth data of infants in a real medical study in Shanghai and produces interpretable *** rates for the proposed estimates of the varying coefficient and covariance functions of the model are derived under mild conditions.

关键词： Convergence rate functional data functional principal components growth curve multiple outcomes

FOURTH ORDER EVOLUTION EQUATIONS WITH SLOWLY VARYING DEPTH AND CURRENT AND STABILITY OF STOKES WAVES

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Journal of Hydrodynamics 1991年第4期3卷 21-42页

作者： Chin-pu, Zhou yan-sheng, Chen Zhongshan Univ Guangzhou China

Fourth order evolution equations with slowly varying depth and current have been derived for two-dimensional modulation Stokes waves in arbitrary water depth. In the absence of current and variation of topography the equations reduce to those of Brinch-Nielsen & Jonsson, and the third order terms agree with those of Turpin & Benmoussa & Mei. Stokes wave in the slowly varying depth and current is specified, and its instability to small sidebands is studied in detail. A general criterion of instability with growth rate 0(Ε2) is given, and the maximum growth rate has also been obtained. An interesting result is that in the fourth-order theory the existence of current and varying depth leads the Stokes wave to be always unstable to small sidebands disturbance.

关键词： Mathematical Techniques Applications Mathematical Techniques Perturbation Techniques Water Waves Mathematical Models

A Null Space Approach for Solving Nonlinear Complementarity Problems

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Acta Mathematicae Applicatae Sinica 2006年第1期22卷 9-20页

作者： pu-yan Nie Department of Mathematics College of Information Science and Technology Jinan University Guangzhou 510632 China

In this work, null space techniques are employed to tackle nonlinear complementarity problems （NCPs）. NCP conditions are transform into a nonlinear programming problem, which is handled by null space algorithms, The NCP conditions are divided into two groups, Some equalities and inequalities in an NCP are treated as constraints, While other equalities and inequalities in an NCP are to be regarded as objective function. Two groups are all updated in every step. Null space approaches are extended to nonlinear complementarity problems. Two different solvers are employed for all NCP in an algorithm.

关键词： Global convergence Nonlinear complementarity problem nonlinear programming null space methods