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Journal of Thermal Science 2024年第1期33卷 268-283页

作者： DANIEL Samuel FONZEU MONGUEN Cedric karel WU Lingnan TIAN Zhenyu Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Tuning the surface acidity of ZSM-5 catalyst is essential to achieve desired propene selectivity and *** several ratios of Zr were utilized to modify ZSM-5 via flame spray pyrolysis technique coupled with a pulse spray evaporation *** interaction between Zr and ZSM-5 in the flame influenced the physicochemical and acidity properties of the Zr/*** increasing Zr ratio in ZSM-5 shows coated layers of irregular nano-sized Zr with an increase in crystallite sizes due to the synergetic effect between Zr and *** surface chemical analysis revealed increased lattice oxygen on the Zr modified ZSM-5(1:4) sample compared to other *** acidity analysis revealed the Lewis and Br?nsted acid distribution in the weak and medium acid sites on the catalyst ***,the increase in Zr loading decreased the concentration of Br?nsted acid sites and tuned the catalyst surface to more Lewis acidity,promoting propene selectivity and hindering the over-oxidation of *** modified ZSM-5 catalysts were examined in a fixed bed reactor within 300℃-700℃ at a gas hourly space velocity(GHSV) of 6000 mL·g(catalysts)^(-1)·h^(-1) for the oxidative dehydrogenation of propane(ODHP) to *** the catalysts,Zr/ZSM-5(1:4) exhibited the best propene yield, with 57.19% propane conversion and 75.54% selectivity to propene and the highest *** work provides a promising strategy for tuning the surface acidity of ZSM-5 with Zr for ODHP applications.

关键词： flame synthesis Zr modified ZSM-5 catalyst ODHP surface acidity lattice oxygen

Chemical degradation of platinum oncolytics in urine and speciation of the inorganic contaminants cisplatin and carboplatin relevant in waste water

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Emerging Contaminants 2024年第1期10卷 47-53页

作者： karel Folens Janis Baeten Karen Couvreur Gijs Du Laing Laboratory of Analytical Chemistry and Applied Ecochemistry(ECOCHEM) Department of Green Chemistry and TechnologyGhent UniversityFrieda Saeystraat 19052ZwijnaardeBelgium Center for Microbial Ecology and Technology(CMET) Department of BiotechnologyGhent UniversityCoupure Links 6539000GentBelgium Medical Oncology AZ GlorieuxGlorieuxlaan 559600RonseBelgium

Understanding the prevalent form of platinum(Pt)based antineoplastic agents,used in chemotherapy,is of importance to develop a remediation strategy that restricts aquatic *** speciation of Pt-based compounds was measured in actual patients’urine using hydrophobic interaction liquid chromatography(HILIC)equipped with an ICP-MS *** showed poor metabolization and intact excretion 11 h after administration,whereas cisplatin underwent a rapid aquation in the first 7 *** compare,the in vitro degradation rate of cisplatin,carboplatin and oxaliplatin was determined in synthetic human urine,mimicking true environmental *** fraction of intact molecules was measured at regular intervals following incubation at 37°C,resulting in degradation rate *** chemical stability was highest for carboplatin(k=0.0143±0.0012 min−1),versus faster degradation of oxaliplatin and cisplatin by exponential decay with k1 of 0.0026±0.0001 min−1 and k_(2)=5.59±0.46×10^(−6) min−1,*** kinetic parameters can serve as input to further expand modelling databases and improve the predictive power of speciation software to estimate eco-toxicity *** the strong residual cytotoxicity of the platinum antineoplastic molecules following renal clearance and human excretion,the contaminants are of high environmental concern and offer potential for metal recovery using advanced treatment *** such water treatment processes,especially carboplatin,above all cancerostatic platinum compounds,should be addressed since it is more persistent in the aquatic environment.

关键词： Pharmaceuticals Inorganic contaminants Speciation analysis Ecotoxicity

中国阿尔泰造山带地壳改造与成熟化：岩浆-构造-变质视角

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地质通报 2024年

作者：汪晟蒋映德孙敏 karel Schulmann 袁超安徽建筑大学土木工程学院中国科学院广州地球化学研究所同位素地球化学国家重点实验室香港大学地球科学系捷克地质调查局

活动大陆边缘巨型杂岩系如何演化成为成熟大陆的一部分，仍是一个亟待深入探究的重要科学问题。位于中亚造山带腹地的中国阿尔泰地区记录了复杂的地壳改造地质历史同时也具备了成熟大陆地壳结构，是研究增生杂岩改造和大陆地壳成熟的天... 详细信息

活动大陆边缘巨型杂岩系如何演化成为成熟大陆的一部分，仍是一个亟待深入探究的重要科学问题。位于中亚造山带腹地的中国阿尔泰地区记录了复杂的地壳改造地质历史同时也具备了成熟大陆地壳结构，是研究增生杂岩改造和大陆地壳成熟的天然实验室。本文以中国阿尔泰造山作用主期（志留-泥盆纪）为重点，系统总结了其增生杂岩在变质-变形、深熔作用及花岗岩化方面的进展。研究表明1）奥陶系增生杂岩在志留-泥盆纪时期经历了挤压-伸展-挤压的变形改造并发育广泛的深熔作用；2）地球化学对比和热力学模拟揭示区内志留-泥盆纪花岗岩可能来源于奥陶系增生杂岩的深熔作用；3）区域变形过程促进了地壳分异和成熟大陆地壳结构的形成。综合区域研究资料，本文认为，志留-泥盆纪强烈地壳改造作用与该区域俯冲体系中俯冲板片前进和后撤的反复转换过程密切相关，后者控制了造山带中地壳深熔、流动及成熟化过程。活动大陆边缘强烈的地壳改造作用造成增生杂岩转变为成熟大陆地壳可能是增生型大陆地壳成熟化的又一重要机制。

关键词：中国阿尔泰变形-变质深熔作用地壳分异成熟大陆地壳

新与旧的碰撞捷克Roznov pod Radhostěm市立图书馆

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室内设计与装修 2024年第8期 30-35页

作者： [捷克]CTYRSTěN karel Kubza BoysPlayNice(摄影) 麦子(编译) 不详

捷克Roznov pod Radhostěm市立图书馆位于市区的一处十字路口,一侧是居民区、学校、公交站台和综合诊所,另一侧是艺术小学和市中心。图书馆紧邻城镇公园和一条主干道,其全新设计的馆前公共空间点缀着2条繁忙的道路,成为Bezrucova街文... 详细信息

捷克Roznov pod Radhostěm市立图书馆位于市区的一处十字路口,一侧是居民区、学校、公交站台和综合诊所,另一侧是艺术小学和市中心。图书馆紧邻城镇公园和一条主干道,其全新设计的馆前公共空间点缀着2条繁忙的道路,成为Bezrucova街文化区的庄严入口。扩大图书馆的容量,使其能在不限制学校教育计划的情况下,为老年人和带孩子的父母提供早间便利服务。另外,拓展青少年的阅读空间,为青少年提供一个安全的聚会场所。

关键词：聚会场所阅读空间公交站台图书馆文化区公共空间便利服务新与旧

Significant intervals of energy transforms in bubbles freely oscillating in liquids

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Journal of Hydrodynamics 2017年第2期29卷 217-225页

作者： karel Vokurka Physics Department Technical University of LiberecLiberecCzech Republic

A wall motion of a bubble freely oscillating in a liquid is studied from the point of view of energy conversions at different instants. It is shown that the time of the bubble oscillation can be divided into two distinct intervals. In the first long interval （here called PK and KP intervals） the prevailing energy conversion is between the potential energy of the bubble and the kinetic energy of the liquid. In the second short interval （here called KI and IK intervals） the kinetic energy of the liquid is transformed into the internal energy of the gas/vapor in the bubble interior and into some other forms of energy. By observing the bubble wall motion in the PK and KP intervals, it is shown that only the value of the maximum bubble radius in the corresponding oscillation can be determined. However, only the knowledge of the maximum bubble radii is insufficient for formulation of a correct theoretical model. Unfortunately this fact is often not noticed in the literature.

关键词： Energy transforms free bubble oscillations energy conversions in bubbles

Quasi-periodic variations of low energy cosmic rays

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Science China(Technological Sciences) 2016年第4期59卷 547-557页

作者： KUDELA karel SABBAH Ismail IEP SAS Kosice Slovakia Department of Natural Sciences College of Health Sciencesthe Public Authority for Applied Education and TrainingKuwait

Cosmic rays(CR)play an important role in space weather-related *** temporal variability,both of a quasi-periodic character as well as an irregular one,has been studied from ground-based direct measurements,as well as from cosmogenic nuclides,over a long *** attempt to describe the current knowledge of selected quasi-periodicities in CR flux in the energy range above the atmospheric threshold,from direct *** power spectrum density(PSD)of the CR time series as measured by neutron monitors(NMs)and by muon detectors has a rather complicated *** with the shape(slope)of the PSD,knowledge of the contribution of quasi-periodic variations(q-per)to the CR signal is of importance for the modulation,as well as for checking the links of CR to space weather,and/or to space climate *** rotation of the Earth and solar rotation cause two types of mechanisms behind the certain q-per observed in secondary CR on the Earth’s *** activity and solar magnetic field cyclicities contribute to the q-per signals in CR if studied over a longer *** complexity of the spatial structure of the interplanetary magnetic field(IMF)and its evolution within the heliosphere,in addition to the changes in the geomagnetic field,cause variability in contributions of the q-per in *** spectra are useful tools for checking the fine structure of q-per and their temporal *** a long time NMs and muon telescopes provide information about q-per in CR.

关键词： cosmic rays periodicities neutron monitors muon detectors

On Relations of Vector Optimization Results with C^(1,1) Data

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Acta Mathematica Sinica,English Series 2010年第11期26卷 2031-2040页

作者： Duan BEDNA■íK karel PASTOR Department of Mathematics University of Hradec Králové Department of Mathematical Analysis and Applications of Mathematics Faculty of SciencePalack■ University

In this article we prove that some of the sufficient and necessary optimality conditions obtained by Ginchev, Guerraggio, Luc [Appl. Math., 51, 5-36 （2006）] generalize （strictly） those presented by Guerraggio, Luc [J. Optim. Theory Appl., 109, 615-629 （2001）]. While the former paper shows examples for which the conditions given there are effective but the ones from the latter paper fail, it does not prove that generally the conditions it proposes are stronger. In the present note we complete this comparison with the lacking proof.

关键词： C1'1 function generalized second-order directional derivative Dini derivative weakly efficient minimizer isolated minimizer of second-order

A Two-Level Method for Nonsymmetric Eigenvalue Problems

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Acta Mathematicae Applicatae Sinica 2005年第1期21卷 1-12页

作者： karel Kolman Mathematical Institute Academy of Sciences of the Czech Republic ■itná 25 11567 Praha 1 Czech Republic

A two-level discretization method for eigenvalue problems is *** to the standard Galerkin finite element discretization technique performed on a fine gridthis method discretizes the eigenvalue problem on a coarse grid and obtains an improved eigenvector(eigenvalue) approximation by solving only a linear problem on the fine grid (or two linear problemsfor the case of eigenvalue approximation of nonsymmetric problems). The improved solution has theasymptotic accuracy of the Galerkin discretization solution. The link between the method and theiterated Galerkin method is established. Error estimates for the general nonsymmetric case arederived.

关键词： eigenvalue problems finite elements postprocessing two-level method two-grid method iterated Galerkin method

Error Estimates for the Time Discretization of a Semilinear Integrodifferential Parabolic Problem with Unknown Memory Kernel

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Numerical Mathematics(Theory,Methods and Applications) 2017年第1期10卷 116-144页

作者： Marijke Grimmonprez karel Van Bockstal Marian Slodicka Department of Mathematical Analysis Ghent UniversityGalglaan 29000 GhentBelgium

This paper is devoted to the study of an inverse problem containing a semilinear integrodifferential parabolic equation with an unknown memory *** equation is accompanied by a Robin boundary *** missing kernel can be recovered from an additional global measurement in integral *** this contribution,an error analysis is performed for a time-discrete numerical scheme based on Backward Euler’s *** theoretical results are supported by some numerical experiments.

关键词： Parabolic inverse problem convolution kernel error estimates