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Ultrafine Ru nanoparticles anchored on core-shell structured zeolite-carbon for efficient catalysis of hydrogen generation

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Rare Metals 2023年第7期42卷 2324-2334页

作者： Yue-Wei Wei Guang Yang Xi-Xi Xu Yan-Yan Liu nai-xin kang Bao-Jun Li Yong-Zhao Wang Yong-Xiang Zhao School of Chemistry and Chemical Engineering Shanxi UniversityTaiyuan030006China Engineering Research Center of Ministry of Education for Fine Chemicals Shanxi UniversityTaiyuan030006China Tobacco College of Henan Agricultural University Zhengzhou450002China College of Science Henan Agricultural UniversityZhengzhou450002China ISM UMR CNRS Nº5255Univ.BordeauxTalence Cedex33405France Research Center of Green Catalysis College of ChemistryZhengzhou UniversityZhengzhou450001China

As a promising route to hydrogen production,hydrolysis of ammonia borane(AB)aqueous solution requires efficient and stable *** this paper,a carbon-coated zeolite is prepared by high temperature calcination using glucose as carbon *** Ru nanoparticles are anchored on the composite support with core-shell structure using a simple in situ reduction *** prepared catalyst expressed outstanding catalytic activity in the hydrolytic dehydrogenation of *** effects of support prepared by different synthesis parameters on the performance of catalyst are *** Ru/S-1@C(RSC-2)catalyst exhibited the highest catalytic activity for hydrolytic dehydrogenation of AB with a turnover frequency of 892 min^(-1)at room *** performance is superior to that of many catalysts previously *** excellent catalytic activity is attributed to the carbon layer on catalyst surface effectively limiting the aggregation of Ru nanoparticles in the hydrolysis *** zeolite also plays a role in preactivation of *** pre-activation accelerates the ratelimiting step of water dissociation in the *** kinetic studies for determining the activation energy(E_(a)=36.8 kJ·mol^(-1))were based on reaction *** effects of catalyst concentration,AB concentration and NaOH concentration on hydrolysis rate of AB were further *** high-performance catalysts and the preparation method in this study have wide application prospects in the field of clean energy.

关键词： Ammonia borane Ruthenium Hydrogen generation Carbon Zeolite

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Interfacial active sites on Co-Co_(2)C@carbon heterostructure for enhanced catalytic hydrogen generation

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Rare Metals 2023年第6期42卷 1935-1945页

作者： Huan-Huan Zhang Yang-Bin Ren Zhen-Luo Yuan nai-xin kang Sehrish Mehdi Cong-Cong xing Xian-Yun Liu Yan-Ping Fan Bao-Jun Li Bao-Zhong Liu College of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuo454003China ISM UMR CNRS No 5255Univ.BordeauxTalence Cedex33405France Department of Chemistry The Women University MultanKutchery CampusMultan66000Pakistan Department of Materials Science and Engineering Pennsylvania State UniversityUniversity ParkPA16802USA Research Center of Green Catalysis College of ChemistryZhengzhou UniversityZhengzhou450001China Henan Key Laboratory of Coal Green Conversion Henan Polytechnic UniversityJiaozuo454003China

Designing catalysts with capable dual-active sites to drive catalytic hydrogen generation is necessary for the future hydrogen ***,the interfacial active sites consisting of Co and Co-C on Co-Co_(2)C@carbon heterostructure are designed through annealing and highpressure *** operating temperature during the high-pressure carbonization under a CO-reducing environment is responsible for the construction and regulation of Co-Co_(2)C@C *** optimal catalyst has a high turnover frequency(TOF) of33.1 min^(-1) and low activation energy(E_a) of27.3 kJ-mol^(-1) during the hydrolysis of NH_(3)BH_(3).The catalytic stability of Co-Co_(2)C@C has no dramatic deterioration even after 5 cyclic *** interfacial active sites and the carbon on the catalyst surface enhance hydrogen generation kinetics and catalytic *** construction of interfacial active sites in Co-Co_(2)C@C prompts the dissociation of reactants(NH_(3)BH_(3) and H_(2)O molecules),leading to an enhanced catalytic hydrogen generation from NH_(3)BH_(3) hydrolysis(Co activates NH_(3)BH_(3) and Co-C activates H_(2)O).The construction of hetero-structural catalysts provides theoretical direction for the rational design of advanced transition metal carbide materials in the field of energy catalysis and conversion.

关键词： Interfacial active sites Bimolecular activation Heterostructure Hydrogen generation Catalytic mechanism

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中华医学会呼吸病学年会——2011（第十二次全国呼吸病学学术会议）

作者： Min Song,Ping Chen,nai-xin kang Department of Respiratory Medicine,Second Xiangya Hospital,Central South University

The group of interstitial lung diseases(ILDs) is formed by diffuse parenchymal lung abnormalities, whose aetiology is unknown in the majority of cases,the clinical course differs and the prognosis is generally ***,Some of the them have a potential relation to tobacco smoking and are known as smoking-related ILD(sr-ILD).Smoking is recognized as one high risk factor of

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启发式列生成算法求解带恶化效应的同构并行机调度问题

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控制与决策 2024年第5期39卷 1636-1644页

作者：孙鑫伟钱斌胡蓉张森于乃康昆明理工大学信息工程与自动化学院昆明650500 昆明理工大学云南省人工智能重点实验室昆明650500

针对实际生产中广泛存在的一类带恶化效应的同构并行机调度问题,以最小化最大完工时间为优化目标,构建该问题的整数规划模型,并提出一种启发式列生成算法(HCGA)进行求解.在HCGA中,首先,利用Dantzig-Wolfe分解方法,将原问题分解为一个主... 详细信息

针对实际生产中广泛存在的一类带恶化效应的同构并行机调度问题,以最小化最大完工时间为优化目标,构建该问题的整数规划模型,并提出一种启发式列生成算法(HCGA)进行求解.在HCGA中,首先,利用Dantzig-Wolfe分解方法,将原问题分解为一个主问题(MP)和多个子问题;然后,设计启发式算法获得初始列,其中每列为一台机器上的一个调度方案,基于初始列构建限制主问题(RMP)模型;接着,设计快速有效的动态规划算法求解子问题,以得到需添加至RMP的列集,同时,考虑传统列生成算法收敛速度较慢,设计一系列方法来加速列生成过程;最后,基于所获取的MP线性松弛解,设计深潜启发式算法确定原问题的整数解. HCGA与商用求解器GUROBI的对比实验结果表明, HCGA可在较短时间内获得更优的解.

关键词：并行机恶化效应最大完工时间列生成动态规划深潜启发式

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Congenital bronchoesophageal fistula in adults

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World Journal of Gastroenterology 2011年第10期17卷 1358-1361页

作者： Bao-Shi Zhang nai-kang Zhou Chang-Hai Yu Department of Cardio-tho-raeic Surgery First Affiliated Hospital of Chinese PLA General Hospital Beijing 100048 China Department of Thoracic Surgery Chinese PLA General Hospital Beijing 100853 China

AIM: To study the clinical characteristics, diagnosis and surgical treatment of congenital bronchoesophageal fi stulae in adults. METHODS: Eleven adult cases of congenital bronchoesophageal fistula diagnosed and treated in our hospital between May 1990 and August 2010 were reviewed. Its clinical presentations, diagnostic methods, anatomic type, treatment, and follow-up were recorded. RESULTS: Of the chief clinical presentations, nonspecific cough and sputum were found in 10 (90.9%), recurrent bouts of cough after drinking liquid food in 6 (54.6%), hemoptysis in 6 (54.6%), low fever in 4 (36.4%), and chest pain in 3 (27.3%) of the 11 cases, respectively. The duration of symptoms before diagnosis ranged 5-36.5 years. The diagnosis of congenital bronchoesophageal fistulae was established in 9 patients by barium esophagography, in 1 patient by esophagoscopy and in 1 patient by bronchoscopy, respectively. The congenital bronchoesophageal fistulae communicated with a segmental bronchus, a main bronchus, and an intermediate bronchus in 8, 2 and 1 patients, *** treatment of congenital bronchoesophageal fistulae involved excision of the fistula in 10 patients or division and suturing in 1 patient. The associated lung lesion was removed in all patients. No long-term sequelae were found during the postoperative follow-up except in 1 patient with bronchial fistula who accepted reoperation before recovery. CONCLUSION: Congenital bronchoesophageal fistula is rare in adults. Its most useful diagnostic method is esophagography. It must be treated surgically as soon as the diagnosis is established.

关键词： Congenital bronchoesophageal fistula Adult Esophagography Surgical treatment

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基于可视化近超声的狭长管道人员定位系统

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计算机工程与设计 2024年第1期45卷 55-62页

作者：孙志明尹康涌贾乃征梁伟黄浩声王智国网江苏省电力有限公司电力科学研究院江苏南京211103 浙江大学控制科学与工程学院浙江杭州310007

针对工业系统室内管道空间所具有的狭长和弯折等复杂特征,以及现有室内定位技术精度不够、实用性不强的问题,提出一种基于可视化近超声的狭长管道人员定位系统。采用逐帧归一化互相关方法和联合小波导数寻峰的方法确定到达时间。将改进... 详细信息

针对工业系统室内管道空间所具有的狭长和弯折等复杂特征,以及现有室内定位技术精度不够、实用性不强的问题,提出一种基于可视化近超声的狭长管道人员定位系统。采用逐帧归一化互相关方法和联合小波导数寻峰的方法确定到达时间。将改进变异率和选择策略的差分进化算法(EA)与极大似然的TDOA算法结合进一步增强定位准确度,将MDS分解与基站定位融合实现基站自标定功能。仿真和实验结果表明,该方法可以很好克服狭长弯折空间以及环境噪声干扰带来的影响,满足狭长管道空间人员定位系统的高精度定位需要。

关键词：广义互相关声学定位到达时间差多维尺度变换差分进化算法自标定算法多径效应狭长空间定位

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Valence Orbitals of Ethane by Electron Momentum Spectroscopy

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Chinese Physics Letters 1998年第5期15卷 341-342页

作者： PANG Wen-ning GAO nai-fei ZHANG Wen-xin SHANG Ren-cheng DENG Jing-kang CHEN Xue-jun Laboratory of Electron Momentum Spectroscopy Department of PhysicsTsinghua UniversityBeijing 100084

The valence electron binding energy spectra and orbital electron momentum distributions of ethane(C2H6)have been measured by high resolution(ΔE=0.9eV,Δp=0.1 a.u.)symmetric non-coplanar electron momentum spectroscopy,at an impact energy of 1200eV+binding *** high energy resolution is adequate for us to be observe clearly the separated valence orbitals of C_(2)H_(6).

关键词： energy. momentum valence

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Valence Shell Ionization Spectra of Propane by (e, 2e) Spectroscopy

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Chinese Physics Letters 1998年第9期15卷 648-650页

作者： PANG Wen-ning ZHANG Wen-xin GAO nai-fei SHANG Ren-cheng DENG Jing-kang CHEN Xue-jun Department of Physics Tsinghua UniversityBeijing 100084

The measurements of the valence shell ionisation energy spectra(6-32eV)for propane(C_(3)H_(8))by high resolution(ΔE=0.9eV andΔp=0.1 a.u.)(e,2e)spectrometer at impact energy of 1200eV plus binding energy and symmetric noncoplanar kinematics are *** spectrum is consistent with a single particle picture of ionization from each of the seven outer-valence orbitals and the three inner-valence *** ionization energies are in agreement with published photoelectron spectroscopy data.

关键词： valence ionization outer

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农业合作制发展的历史逻辑和理论逻辑——列宁发表《论合作社》百年前后农业集体经济实现形式变革的时代启示

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上海经济研究 2020年第12期32卷 54-65页

作者：康乃馨国防科技大学文理学院 410073

我国农业发展和农民生活水平的提高,充分证明我国农业合作制的道路是正确的,是中国特色社会主义制度优越性在"三农"方面的具体体现。而今理论界还有人用"本本"剪裁现实,似乎我国农业经济形式离开了社会主义轨道。应当用百年来的实践加... 详细信息

我国农业发展和农民生活水平的提高,充分证明我国农业合作制的道路是正确的,是中国特色社会主义制度优越性在"三农"方面的具体体现。而今理论界还有人用"本本"剪裁现实,似乎我国农业经济形式离开了社会主义轨道。应当用百年来的实践加以检验。从列宁领导苏联合作制和我国农业合作制两个"否定之否定"的历史过程证实:农业的社会主义集体经济发展必须适合农业生产力的特殊性加本国特点,采取灵活多样的实现形式与一定的过渡步骤才能有利于农业现代化生产力和农民生活水平的提高、实现现代化,而不能完全照搬工业公有制的模式和方法。应当对列宁从共耕制到合作制和我国合作化—公社化—多种合作形式作历史分析。我国"三农"现实的形式和政策是符合实际和历史唯物论原理的,要结合历史领会列宁所说的农民"个人所有制",认识"三权分置"等深化改革的正确性,澄清偏颇观点。如今我们处在"两个飞跃"中间的过渡阶段,未来的农业产业革命将是高端生态农业,会有更加高效灵活的集体经济形式出现。

关键词：合作社农业生产力特殊性土地公有制个人所有制集体经济实现形式

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Mechanical Properties and Microstructure of In Situ TiB_2-7055 Composites

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Chinese Journal of Aeronautics 2006年第B12期19卷 66-70页

作者： CHEN dong LE Yong-kang BAI Liang MA nai-heng LI Xian-feng WANG Hao-wei The State Key laboratory of Metal Matrix Composites Shanghai Jiao Tong University Shanghai 200030 China

In order to fabricate a kind of high strength particulate reinforced aluminum-matrix composites, the high strength aluminum alloy 7055 was selected as a matrix. Composites reinforced with varying amounts of TiB2 particles were synthesized using the in situ method, and their mechanical properties and microstructure were analyzed. It is found that the in situ TiB2 particles sized from 50 to 400 um uniformly disperse in the matrix. With the weight fraction of TiB2 particles increasing, the elastic modulus as well as the yield strength and the ultimate tensile strength increase, while the ductility decrease. The improvement of strength could be attributed to good bonding between TiB2 and the matrix, and also the TiB2 particles act as a barrier to dislocation.

关键词： metal matrix composite in situ mechanical properties microstructure

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