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Synthesis of ordered mesoporous crystalline boron phosphate scaffold with double diamond surface structure

Science China Chemistry 2025年第2期68卷 590-600页

作者： Chao Wang Wen-Duo lu Jiao Wang Shunai Che An-Hui lu lu Han School of Chemical Science and Engineering Tongji UniversityShanghai 200092China State Key Laboratory of Fine Chemicals Liaoning Key Laboratory for Catalytic Conversion of Carbon ResourcesSchool of Chemical EngineeringDalian University of TechnologyDalian 116024China School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesState Key Laboratory of Metal Matrix CompositesShanghai Key Laboratory for Molecular Engineering of Chiral DrugsShanghai Jiao Tong UniversityShanghai 200240China

Ordered mesoporous materials have received great attention due to their well-defined pore structures and potential applications in catalysis,adsorption,separation,drug delivery,*** various compositions of mesoporous solids have been successfully prepared,the preparation of crystalline non-metallic oxyacid salts with ordered mesoporosity remains a major ***,we report the synthesis of a mesoporous solid acid crystalline boron phosphate(BPO_(4))catalyst with a bicontinuous shifted double diamond(SDD)hyperbolic surface *** BPO_(4) scaffold was obtained by synergistic selfassembly in a mixed solvent of water and tetrahydrofuran using the diblock copolymer poly(ethylene oxide)-block-polystyrene as template and phosphoric acid and orthoboric acid as inorganic *** structure consists of two sets of diamond networks adjacent to each other with a mesostructural scale tetragonal symmetry(space group I4_(1)/amd)with unit cell parameters of a=80 nm and c=113 nm,which affords the scaffold a specific surface area of 44 m^(2)/*** a solid acid catalytic material,the SDD BPO_(4) scaffold exhibited excellent catalytic activity at room temperature with a conversion of furfural to 2-(dimethoxymethyl)furan over 70%and can be reused after recovery without serious loss of *** the propane oxidative dehydrogenation reaction,SDD BPO_(4) demonstrated high olefin productivity and selectivity while maintaining high reaction *** study provides ideas for the preparation of ordered mesoporous crystalline catalytic materials and demonstrates their potential for practical applications.

关键词： boron phosphate mesoporous material self-assembly block copolymer catalyst

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基于积分反馈控制的单兵组合导航定位算法

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计算机仿真 2022年第11期39卷 387-391页

作者：田健刘宇路永乐吴英重庆邮电大学光电工程学院重庆400065 重庆科技学院智能技术与工程学院重庆400065

在组合导航系统中,改善系统特征的估计算法精度可以提高导航精度。卡尔曼滤波是进行最小方差估计的最常用的方法,但其并不能减小如稳态误差等系统特征。对于提高导航精度等应用来说,特性比方差优化更重要。而如稳态特征这些问题已经在... 详细信息

在组合导航系统中,改善系统特征的估计算法精度可以提高导航精度。卡尔曼滤波是进行最小方差估计的最常用的方法,但其并不能减小如稳态误差等系统特征。对于提高导航精度等应用来说,特性比方差优化更重要。而如稳态特征这些问题已经在经典控制技术中得到了很好的解决。旨在结合现代控制技术来优化经典卡尔曼滤波器中位置估计和速度估计方法,仿真结果表明,在组合导航系统中,上述算法不仅保留了传统的卡尔曼滤波器的功能和优点,并能够很好地跟踪噪声方差,对速度、位置等系统状态进行估计。

关键词：卡尔曼滤波积分反馈控制组合导航

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基于multi-agent的多任务分配问题研究

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计算机应用研究 2014年第7期31卷 1980-1983,1988页

作者：刘科郭小和周继强卢永乐南昌航空大学飞行器工程学院南昌330063 中航工业洪都飞机设计研究所南昌330024

传统的多agent多任务分配往往采用集中式的分配方法。由于集中式分配方法存在计算量大且易造成通信拥塞的不足,近年来又产生了各种分布式分配算法,但分布式算法容易陷入局部最优,影响分配效果。针对动态环境中任务复杂多样且agent能力差... 详细信息

传统的多agent多任务分配往往采用集中式的分配方法。由于集中式分配方法存在计算量大且易造成通信拥塞的不足,近年来又产生了各种分布式分配算法,但分布式算法容易陷入局部最优,影响分配效果。针对动态环境中任务复杂多样且agent能力差异,提出一种agent通信与结构框架,通过三个层次将集中式与分布式相结合,反馈地引入有利于分配过程的优化。根据任务的时间窗口和agent的代价设计合理的任务回报函数,提出一种分布式任务分配算法,对多任务进行合理分配,同时保证算法的鲁棒性。仿真结果表明,与单纯的集中式和分布式任务分配方法相比,混合系统能够完成全部的任务,且获得与集中式相当的任务收益,对框架下的各个agent的能力进行了充分利用,验证了通信与结构框架以及所提任务分配算法在动态环境多agent多任务分配过程中的有效性和合理性。

关键词：层次分配分布式集中式混合系统任务分配时间窗口协同控制

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The P_(5)-saturation Game

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Acta Mathematicae Applicatae Sinica 2025年第1期41卷 295-304页

作者： Zhen HE Mei lu School of Mathematics and Statistics Beijing Jiaotong UniversityBeijing 100044China Department of Mathematical Sciences Tsinghua UniversityBeijing 100084China

let F,G and H be three graphs with G■*** call G an F-saturated graph relative to H,if there is no copy of F in G but there is a copy of F in G+e for any e∈E(H)\E(G).The F-saturation game on host graph H consists of two players,named Max and Min,who alternately add edges of H to G such that each chosen edge avoids creating a copy of F in G,and the players continue to choose edges until G becomes F-saturated relative to *** wishes to maximize the length of the game,while Min wishes to minimize the *** sat_(g)(F,H)(***_(g)'(F,H))denote the number of edges chosen when Max(*** Min)starts the game and both players play *** this article,we show that sat_(g)(P_(5),K_(n))=sat_(g)'(P_(5),K_(n))=n+2 for n≥15,and satg(P_(5),K_(m,n)),sat_(g)'(P_(5),K_(m,n))lie in{m+n-[m+2/4];m+n-[m-3/4]}if n≥5/2m and m≥4,respectively.

关键词： saturation number saturation game host graph

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Efficient photodegradation of perfluoroalkyl substances under visible light by hexagonal ZnIn_(2)S_(4) nanosheets

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Journal of Environmental Sciences 2025年第2期148卷 116-125页

作者： Fuyu Liu Hui Xue Tingshuo Kang Qiupei lei Jiazhe Chen Zhihong Zuo Bin Han Xize lu Xiao Yang Xiangcheng Shan Xiaoyang Song Qingzhe Zhang yongguang Yin yong Cai Shandong Key Laboratory of Environmental Processes and Health Qingdao Key Laboratory of Marine Pollutant PreventionSchool of Environmental Science and EngineeringShandong UniversityQingdao 266237China Research Center for Particle Science and Technology Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China Shenzhen Research Institute of Shandong University A301 Virtual University Park in South DistrictShenzhen 518057China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 10085China Department of Chemistry and Biochemistry Florida International UniversityMiamiFlorida 33199USA

Perfluoroalkyl substances(PFASs)are typical persistent organic pollutants,and their removal is urgently required but *** has shown potential in PFASs degradation due to the redox capabilities of photoinduced charge carriers in ***,hexagonal ZnIn_(2)S_(4)(ZIS)nanosheets were synthesized by a one-pot oil bath method and were well characterized by a series of *** the degradation of sodium p-perfluorous nonenoxybenzenesulfonate(OBS),one kind of representative PFASs,the assynthesized ZIS showed activity superior to P25 TiO_(2) under both simulated sunlight and visible-light *** good photocatalytic performance was attributed to the enhanced light absorption and facilitated charge *** pH conditions were found crucial in the photocatalytic process by influencing the OBS adsorption on the ZIS *** e−and h+were the main active species involved in OBS degradation in the ZIS *** work confirmed the feasibility and could provide mechanistic insights into the degradation and defluorination of PFASs by visible-light photocatalysis.

关键词： PFASs Defluorination Photocatalysis Visible light ZnIn_(2)S_(4)

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Effect of forearm and posterior wall anastomosis on gastroesophageal reflux in proximal gastrectomy patients

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World Journal of Gastrointestinal Surgery 2025年第3期17卷 213-220页

作者： Jia-le Yang Yi-Jie Yang lu Xu Department of General Surgery The First Affiliated Hospital of Soochow UniversitySuzhou 215006Jiangsu ProvinceChina

BACKGROUND Proximal gastrectomy for gastric cancer often leads to postoperative gastroeso-phageal reflux(GER).This study compares the impact of forearm anastomosis and posterior wall anastomosis techniques on GER in patients undergoing this *** To identify the most effective method for reducing reflux symptoms while preserving gastrointestinal integrity and nutritional *** A retrospective evaluation was conducted on 60 patients who underwent proximal gastrectomy between December 2020 and December 2023,divided equally into two groups based on the anastomosis technique used(forearm or posterior wall).GER symptoms were assessed using the GER disease ques-tionnaire(GerdQ)preoperatively and on the first postoperative *** markers[diamine oxidase(DAO),D-lactic acid,and endotoxin(ETX)]and nutritional indicators[serum ferritin(SF),prealbumin(PA),and albumin(ALB)]were measured to evaluate gastrointestinal barrier function and nutritional *** Both groups showed significant improvements in GerdQ scores and reflux symptom scores post-treatment,with the observation group exhibiting greater *** markers indicated enhanced gastrointestinal barrier function post-treatment in both groups,with notable increases in DAO,D-lactic,and ETX *** status indicators also demonstrated significant changes,with reductions in SF,PA,and ALB levels,suggesting an impact of treatment on inflammatory and nutritional *** The forearm anastomosis technique appears to be more effective in reducing GER symptoms and preserving gastrointestinal health in patients undergoing proximal gastrectomy for gastric cancer compared to the posterior wall anastomosis *** preliminary findings advocate for further research to confirm the benefits and potentially standardize Forearm Anastomosis in surgical practice for gastric cancer.

关键词： Proximal gastrectomy Gastroesophageal reflux Forearm anastomosis Posterior wall anastomosis Gastric cancer

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基于490 nm垂直外腔面发射激光器的长距离水下激光通信系统

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物理学报 2024年第17期73卷 169-177页

作者：王涛王章行沈小雨朱仁江蒋丽丹陆寰宇路永乐宋晏蓉张鹏重庆师范大学物理与电子工程学院重庆401331 中国科学院长春光学精密机械与物理研究所长春130033 重庆邮电大学重庆400065 北京工业大学物理与光电工程学院北京100124 重庆师范大学重庆国家应用数学中心重庆401331

水下无线光通信技术为深海勘探和海洋资源开发利用带来了一种效率高且可靠性强的通信新方案.本文采用490 nm垂直外腔面发射激光器作为光源,基于声光外调制技术,采用脉冲位置调制方式(pulseposition modulation,PPM)搭建了长距离水下无... 详细信息

水下无线光通信技术为深海勘探和海洋资源开发利用带来了一种效率高且可靠性强的通信新方案.本文采用490 nm垂直外腔面发射激光器作为光源,基于声光外调制技术,采用脉冲位置调制方式(pulseposition modulation,PPM)搭建了长距离水下无线光通信系统.结合光源的优势并经过软判决算法优化PPM解调来提升水下通信性能,采用64 PPM调制,成功实现了96 m的水下传输距离,在50 MHz时隙频率下得到传输的误码率为1.9×10^(-5).同时测量到采用软判决解调相较于硬判决解调在性能增益上有着大约2 dB的提升,验证了软判决算法在提升水下通信性能方面相比硬判决算法的显著优势.

关键词：垂直外腔面发射激光器脉冲位置调制软判决算法水下无线光通信

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An embedded electron current layer observed at the edge of the plasma sheet in the Earth’s magnetotail

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Earth and Planetary Physics 2025年第1期9卷 148-158页

作者： ChenChen Zhan RongSheng Wang QuanMing lu San lu XinMin Li Deep Space Exploration Laboratory/School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China Chinese Academy of Sciences(CAS)Center for Excellence in Comparative Planetology/CAS Key Laboratory of Geospace Environment/Anhui Mengcheng National Geophysical Observatory University of Science and Technology of ChinaHefei 230026China Collaborative Innovation Center of Astronautical Science and Technology Harbin 150001China

The formation of an embedded electron current sheet within the magnetotail plasma sheet has been poorly *** this article,we present an electron current layer detected at the edge of the magnetotail plasma *** ions were demagnetized inside the electron current layer,but the electrons were still frozen in with the magnetic field ***,this decoupling of ions and electrons gave rise to a strong Hall electric field,which could be the reason for the formation of the embedded thin current *** magnetized electrons,the absence of the nongyrotropic electron distribution,and negligible energy dissipation in the layer indicate that magnetic reconnection had not been triggered within the embedded thin current *** highly asymmetric plasma on the two sides of the current layer and low magnetic shear across it could suppress magnetic *** observations indicate that the embedded electric current layer,probably generated by the Hall electric field,even down to electron scale,is not a sufficient condition for magnetic reconnection.

关键词： magnetotail plasma sheet magnetic reconnection

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基于腰部MEMS-IMU的室内行人导航航向反馈修正算法

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中国惯性技术学报 2017年第6期25卷 725-730,737页

作者：路永乐刘洪志郭俊启陈自然向高军刘宇重庆邮电大学光电信息感测与传输技术重庆市重点实验室重庆400065

航向角误差随时间累积是采用惯性技术实现行人定位系统中影响导航精度的主要因素。通过典型建筑结构和行人行走特征的分析,提出一种室内行人导航航向反馈修正算法。根据行人是否在主方向上直行,区分在两种直行情况下的航向反馈条件,构... 详细信息

航向角误差随时间累积是采用惯性技术实现行人定位系统中影响导航精度的主要因素。通过典型建筑结构和行人行走特征的分析,提出一种室内行人导航航向反馈修正算法。根据行人是否在主方向上直行,区分在两种直行情况下的航向反馈条件,构建航向差值作为状态量进行自适应无迹卡尔曼滤波(AUKF),并运用反馈航向值参与四元数解算,从而减少航向误差的累积。嵌入式消防单兵定位系统平台的实验验证表明:提出的航向反馈修正算法与不反馈时相比,能够精确解算航向的时间增加两倍以上,且导航误差在1%以内,适应环境能力也较强。

关键词： MEMS传感器主方向四元数航向反馈修正自适应无迹卡尔曼滤波

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Understanding the local structure and thermophysical behavior of Mg-La liquid alloys via machine learning potential

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 439-449页

作者： Jia Zhao Taixi Feng Guimin lu National Engineering Research Center for Integrated Utilization of Salt Lake Resource East China University of Science and TechnologyShanghai 200237China Joint International Laboratory for Potassium and Lithium Strategic Resources East China University of Science and TechnologyShanghai 200237China

The local structure and thermophysical behavior of Mg-La liquid alloys were in-depth understood using deep potential molecular dynamic(DPMD) simulation driven via machine learning to promote the development of Mg-La alloys. The robustness of the trained deep potential(DP) model was thoroughly evaluated through several aspects, including root-mean-square errors(RMSEs), energy and force data, and structural information comparison results;the results indicate the carefully trained DP model is reliable. The component and temperature dependence of the local structure in the Mg-La liquid alloy was analyzed. The effect of Mg content in the system on the first coordination shell of the atomic pairs is the same as that of temperature. The pre-peak demonstrated in the structure factor indicates the presence of a medium-range ordered structure in the Mg-La liquid alloy, which is particularly pronounced in the 80at% Mg system and disappears at elevated temperatures. The density, self-diffusion coefficient, and shear viscosity for the Mg-La liquid alloy were predicted via DPMD simulation, the evolution patterns with Mg content and temperature were subsequently discussed, and a database was established accordingly. Finally, the mixing enthalpy and elemental activity of the Mg-La liquid alloy at 1200 K were reliably evaluated,which provides new guidance for related studies.

关键词： magnesium-lanthanum liquid alloys local structure macroscopic properties thermodynamic behavior deep potential mo-lecular dynamic simulation

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