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Mn-CeOx/Ti-PILCs for selective catalytic reduction of NO with NH_3 at low temperature

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Journal of Environmental Sciences 2012年第3期24卷 499-506页

作者： Boxiong Shen hongqing Ma Yan Yao College of Environmental Science and Engineering Nankai University94 Weijin Roadlianjin 300071China

Titanium-pillared clays （Ti-PILCs） were obtained by different ways from TiCl4, Ti（OC3H7）4 and TiOSO4, respectively. Mn-CeOx/Ti- PILCs were then prepared and their activities of selective catalytic reduction （SCR） of NO with NH3 at low-temperature were evaluated. Mn-CeOx/Ti-PILCs were characterized by X-ray diffraction, N2 adsorption, Fourier transform infrared spectroscopy, thermal analysis, temperature-programmed desorption of ammonia and H2-temperature-programmed reduction. It was found that Ti-pillar tend to be helpful for the enlargement of surface area, pore volume, acidity and the enhancement of thermal stability for Mn-CeOx/Ti-PILCs. Mn- CeOx/Ti-PILCs catalysts were active for the SCR of NO. Among three resultant Mn-CeOx/Ti-PILCs, the catalyst from TiOSO4 showed the highest activity with 98% NO conversion at 220°C, it also exhibited good resistance to H2O and SO2 in flue gas. The catalyst from TiCl4 exhibited the lowest activity due to the unsuccessful pillaring process.

关键词： Mn-CeOx/Ti-PILCs titania-pillared methods low-temperature SCR

Semi-analytical method of calculating the electrostatic interaction of colloidal solutions

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Chinese Physics B 2017年第1期26卷 471-481页

作者： hongqing Tian Zengju Lian Faculty of Science Ningbo University Ningbo 315211 China

We present a semi-analytical method of calculating the electrostatic interaction of colloid solutions for confined and unconfined systems. We expand the electrostatic potential of the system in terms of some basis functions such as spherical harmonic function and cylinder function. The expansion coefficients can be obtained by solving the equations of the boundary conditions, combining an analytical translation transform of the coordinates and a numerical multipoint collection method. The precise electrostatic potential and the interaction energy are then obtained automatically. The method is available not only for the uniformly charged colloids but also for nonuniformly charged ones. We have successfully applied it to unconfined diluted colloid system and some confined systems such as the long cylinder wall confinement, the air–water interfacial confinement and porous membrane confinement. The consistence checks of our calculations with some known analytical cases have been made for all our applications. In theory, the method is applicable to any dilute colloid solutions with an arbitrary distribution of the surface charge on the colloidal particle under a regular solid confinement, such as spherical cavity confinement and lamellar confinement.

关键词： Poisson–Boltzmann equation like-charged attraction basis function expansion multipoint collection method

Redesigning green revolution trait with increased grain yield and nitrogen utilization efficiency by reducing brassinosteroid signaling in semidwarf wheat

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Science China(Life Sciences) 2023年第10期66卷 2448-2450页

作者： hongqing Guo Yanhai Yin Department of Genetics Development and Cell BiologyPlant Sciences InstituteIowa State UniversityAmes Iowa 50011USA

Securing food and feed for the increasing world population and decreasing arable land is one of the major challenges of our *** revolution or agriculture revolution was propelled by the use of semidwarf rice and wheat varieties around the world since the 1960s(Peng et al.,1999;Sasaki et al.,2002).The semi-dwarfness leads to lodging resistance and thus allows planting of crops in high densities。

关键词： dwarf crops planting

Abscopal effect of stereotactic radiotherapy combined with anti-PD-1/PD-L1 immunotherapy:Mechanisms,clinical efficacy,and issues

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Cancer Communications 2020年第12期40卷 649-654页

作者： hongqing Zhuang Department of Radiation Oncology Peking University Third HospitalBeijing 100191P.R.China

Immunotherapy,as one of the major strategies for cancer treatment,has shown promising efficacy in cancer treatment by the clinical application of programmed cell death protein-1/programmed cell death-ligand 1(PD-1/PD-L1)antibodies which have demonstrated a significant prolongation in the survival time of melanoma,lung,and liver cancer patients.[1–3].Meanwhile,the clinical observation of partial responses in unirradiated lesions after radiotherapy,termed as abscopal effect,has gradually attracted a lot of attention and has inspired oncologists to combine stereotactic radiotherapy(SABR)with immunotherapy for improving clinical *** is the abscopal effect phenomenon that crucially determines the anti-tumor efficiency of SABR and immune checkpoint inhibitors combination strategy[4].However,due to the short application time and limited experience of the clinical utilization of SABR and anti-PD-1/PD-L1 combination therapy,there are plenty of theoretical and practical issues that need to be systematically discussed,including the mechanisms underlying an abscopal effect,the efficacy and toxicity of combination therapy,and the validity or reliability of corresponding clinical ***,we reviewed previous landmark reports and summarized the research progress of SABR combined with anti-PD-1/PLD-1 therapy to improve the understanding on abscopal effect.

关键词： clinical radiotherapy immunotherapy

Distributed Source Localization under Anchor Position Uncertainty

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Chinese Journal of Electronics 2014年第1期23卷 93-96页

作者： LIU hongqing WU Yuntao Department of Electronic and Computer Engineering National University of Singapore Key Laboratory of Intelligent Robot in Hubei Province Wuhan Institute of Technology

In this work, a distributed source positioning approach is developed based on Alternating direction method of multipliers(ADMM). First, a centralized positioning method is developed under case of the anchor uncertainty. And then, the method is realized in a distributed way using ADMM. Simulation results show that the centralized one is robust to the anchor errors and distributed one has similar performance as the centralized one.

关键词： Target positioning Anchor uncertainty Distributed Computation

Arbitrariness of the general solution of the partial differential equations and its applications

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Science China Mathematics 2010年第7期53卷 1729-1739页

作者： Ding Qi Zhang hongqing Dalian Univ Technol Sch Math Sci Dalian 116024 Peoples R China

Using the framework of formal theory of partial differential equations, we consider a method of computation of the bi-Hilbert polynomial (i.e. Hilbert polynomial in two variables). Furthermore, present an approach to compute the number of arbitrary functions of positive differential order in the general solution. Then, under the "AC=BD" model for mathematics mechanization developed by Hong-qing ZHANG, we present a method to reduce an overdetermined system to a well-determined one. As applications, the Maxwell equations and weakly overdetermined equations are considered.

关键词： 'AC=BD' model involution Hilbert polynomial arbitrariness overdetermined

Symmetry Reductions, Integrability and Solitary Wave Solutions to High-Order Modified Boussinesq Equations with Damping Term

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Communications in Theoretical Physics 2001年第7期36卷 1-6页

作者： YAN ZhenYa XIE FuDing ZHANG hongqing Department of Applied Mathematics Dalian University of Technology Dalian 116024 China Department of Applied Mathematics Dalian University of Technology Dalian 116024 China Department of Applied Mathematics Dalian University of Technology Dalian 116024 China

Both the direct method due to Clarkson and Kruskal and the improved direct method due to Lou are extended to reduce the high-order modified Boussinesq equation with the damping term (HMBEDT) arising in the general Fermi-Pasta-Ulam model. As a result, several types of similarity reductions are obtained. It is easy to show that the nonlinear wave equation is not integrable under the sense of AblowRz's conjecture from the reduction results obtained. In addition, kink-shaped solitary wave solutions, which are of important physical significance, are found for HMBEDT based on the obtained reduction equation.

关键词： modified Boussinesq equation with the damping term, nonlinear evolution equation, symmetry reduction, integrability, solitary wave solution

Why Are Arctic Sea Ice Concentration in September and Its Interannual Variability Well Predicted over the Barents–East Siberian Seas by CFSv2?

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Journal of Meteorological Research 2024年第1期38卷 53-68页

作者： Yifan XIE Ke FAN hongqing YANG School of Atmospheric Sciences Sun Yat-sen Universityand Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519082

To further understand the prediction skill for the interannual variability of the sea ice concentration(SIC)in specific regions of the Arctic,this paper evaluates the NCEP Climate Forecast System version 2(CFSv2),in predicting the autumn SIC and its interannual variability over the Barents–East Siberian Seas(BES).It is found that CFSv2 presents much better prediction skill for the September SIC over BES than the Arctic as a whole at 1–6-month leads,and high prediction skill for the interannual variability of the SIC over BES is displayed at 1–2-month leads after removing the linear ***2 can reasonably reproduce the relationship between the SIC over BES in September and such factors as the surface air temperature(SAT),200-hPa geopotential height,sea surface temperature(SST),and North Atlantic *** addition,it is found that the prescribed SIC initial condition in August as an input to CFSv2 is also ***,the above atmospheric and oceanic factors,as well as an accurate initial condition of SIC,all contribute to a high prediction skill for SIC over BES in *** on a statistical prediction method,the contributions from individual predictability sources are further *** high prediction skill of CFSv2 for the interannual variability of SIC over BES is largely attributable to its accurate predictions of the SAT and SST,as well as a better initial condition of SIC.

关键词： sea ice concentration the Barents-East Siberian Seas Climate Forecast System version 2(CFSv2) prediction skill predictability source atmospheric and oceanic factors initial condition

Optimal car-following control for intelligent vehicles using online road-slope approximation method

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Science China(Information Sciences) 2021年第1期64卷 94-109页

作者： hongqing CHU Lulu GUO Hong CHEN Bingzhao GAO State Key Laboratory of Automotive Simulation and Control Jilin University Center for Cyber-Physical systems University of Georgia Clean Energy Automotive Engineering Center Tongji University

The design of a car-following control system is a multiobjective optimization problem that involves issues in rider safety, ride comfort, and fuel economy. This study proposes a hierarchical design of optimal car-following control where the system is intuitively split into two subsystems with different dynamic properties. Specifically, the high-level subsystem is a linear car-following system with a measurable disturbance of the preceding vehicle’s acceleration, while the low-level subsystem is a nonlinear accelerationtracking system with an unmeasurable road slope. In the design of optimal car-following control, the measurable disturbance of the preceding vehicle’s acceleration is considered from a theoretical perspective, and the unmeasurable road slope is estimated by a novel engineering-oriented approximation method to reduce the influence of driveline oscillation. The performance of the proposed optimal control scheme is evaluated through simulation and real-vehicle experiments, which show that the proposed control algorithm provides a satisfactory road-slope approximation accuracy and that the car-following performance of the proposed optimal control system is better than that of a factory-installed adaptive cruise controller.

关键词： car-following control road-slope approximation hierarchical design linear quadratic regulator intelligent vehicle