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Glacier retreat, rock weathering and the growth of lichensin the Churup Valley, Peruvian Tropical Andes

Journal of Mountain Science 2019年第7期16卷 1485-1499页

作者： adam EMMER Anna JURICOVA Bijeesh Kozhikkodan VEETTIL Global Change Research Institute of the Czech Academy of Sciences Belidla 986/40603 00 BrnoCzech Republic Department of Soil Survey Research Institute for Soil and Water ConservationZabovreska 250156 27 Prague 5一ZbraslavCzech Republic Faculty of Science Charles UniversityAlber tov 6128 43 Prague 2Czech Republic Department for Management of Science and Technology Development Ton Due Thang UniversityHo Chi Minh CityVietnam Faculty of Environment and Labour Safety Ton Due Thang UniversityHo Chi Minh CityVietnam

The most heavily glacierized tropical range in the world– the Peruvian Cordillera Blanca-has been losing ice since the end of the Little Ice Age(LIA).In this study,the decline of the Churup glacier(9°28’18"S;77°25’02"w)and associated processes were documented employing multi-proxy approach including the analysis of remotely sensed images(1948-2016),the Schmidt hammer rock test and lichenometric *** is shown that Churup glacier has lost the vast majority of its estimated LIA extent(1.05±0.1 km^2;45.0×10^6-57.4×10^6 m^3).The rate of glacier retreat is documented to vary in space(SE,Sw and Nw-facing slopes)and time,with the peak between 1986 and *** an area of 0.045 km^2 in 2016,it is expected that the complete deglaciation of the Churup valley is inevitable in the near ***(post-LIA)exposed bedrock surfaces have shown higher R-values(54.2-66.4,AVG 63.3,STDEV 2.9)compared to pre-LIA exposed surfaces(46.1-59.3,AVG 50.1,STDEV 4.9),confirming the links to the duration of rock *** Lichenometric dating is applied to recently exposed areas and elevations above 4800 m a.s.l.,revealing only limited reliability and agreement with the age of deglaciation estimated from remotely-sensed images in such an environment.

关键词： Cordillera Blanca Tropical glaciers Deglaciation Geoenvironmental change Lichenometry Rhizocarpon geographicum Schmidt hammer Andes

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Energy Aspects of CO_2 Sorption in the Context of Sequestration in Coal Deposits

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Journal of Earth Science 2014年第4期25卷 719-726页

作者： Pawe Baran Katarzyna Zarebska adam Nodzeński AGH University of Science and Technology Faculty of Energy and Fuels Al. Mickiewicza 30 30-059 Kraków Poland

This paper summarises the results of experimental testing of carbon dioxide sorption on five coal samples. Sorption tests were done at the temperature 288, 298, 313 and 323 K, in the pressure range 0-5 MPa. The analysis of sorption isotherms and the effects of temperature on sorption capacity reveal that in the case of samples NR1, Pn, Tu, Be the temperature increase from 298 to 323 K led to 1.3-fold decrease of the sorption value. In the ease of coal Th the decrease of sorption capacity was 3-fold. It appears that the analysis of maceral content plays a major role. In the case of coals, porosity is associated with the petrographic composition. The values of the isosteric heat of sorption and the work of expansion and desorption were derived for the investigated sorption systems. Test data reveal that for hard coals the isosteric heat is inversely proportional to the ＂reserve＂ of volumetric work-a major parameter triggering the sudden release of gas from the coalbed, thus enabling us to assess the potential risk involved in rapid unsealing of the coalbed.

关键词： coal carbon dioxide sequestration sorption energy isosteric heat.

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氧化铝生产工艺

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矿产综合利用 1989年第5期 54-58页

作者： R.w.bartlett 汪源成

从铝原料生产氧化铝的方法中生成了一种铵明矾中间产物。最好的原料是粘土,用硫酸浸出时生成铝溶液并与固体物料分离。在用液体离子交换萃取铁艋,溶液在铵离子存在下经高温和高压处理,生成铵明矾的沉淀加以回收。溶液返回浸出粘土,而铵... 详细信息

从铝原料生产氧化铝的方法中生成了一种铵明矾中间产物。最好的原料是粘土,用硫酸浸出时生成铝溶液并与固体物料分离。在用液体离子交换萃取铁艋,溶液在铵离子存在下经高温和高压处理,生成铵明矾的沉淀加以回收。溶液返回浸出粘土,而铵明矾经热分解为氧化铝。分解时放出的气体用循环返回液洗涤,生成粘土浸出液,氧化铝经硫酸洗涤净化,以获得适于铝电解的纯度。

关键词：氧化铝生产工艺粘土溶液洗涤硫酸纯度浸出铝电解固体物料

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Doctor Looks for Better ways to Protect Transplanted Organs

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当代外语研究 2005年第3期 4-6页

作者： adam w.Bingaman 张怡

1954年,布里格姆的外科医生在波士顿妇女医院进行了第一次成功的器官移植。从那以后美国有超过40万例的器官移植。由于其具有较少伤害性的外科技术、更好的抗排异药物和其他方面的改进,器官移植使病人迅速地恢复,甚至能长寿。器官移植... 详细信息

1954年,布里格姆的外科医生在波士顿妇女医院进行了第一次成功的器官移植。从那以后美国有超过40万例的器官移植。由于其具有较少伤害性的外科技术、更好的抗排异药物和其他方面的改进,器官移植使病人迅速地恢复,甚至能长寿。器官移植面临的最大问题就是供体器官奇缺,很多人在等待中死去。医生们正在寻求更好的方法来保护移植的器官。

关键词： Bi

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Long-term changes and periodicity of ice phenomena in the high mountain Lake Morskie Oko(Tatra Mountains,western Carpathians)

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Journal of Mountain Science 2022年第11期19卷 3063-3075页

作者： POCIASK-KARTECZKA Joanna NIECKARZ Zenon CHOIŃSKI adam Institute of Geography and Spatial Management Jagiellonian UniversityKraków 30387Poland Marian Smoluchowski Institute of Physics Jagiellonian UniversityKraków 30348Poland Institute of Physical Geography and Environmental Planning Adam Mickiewicz University in PoznańPoznań61680Poland

High montain lakes are regarded as sensitive indicators of environmental changes in local and global *** recent years,climate change has considerablely influenced the timing of ice phenomena in these *** objective of the paper is an investigation of long-term changes and periodicity of ice phenomena in high mountain Lake Morskie Oko(1392.8 m a.s.l.)located in the Tatra *** the period *** study employed the Lomb-Scargle periodogram,linear regression modelling for temporal trends,correlation analysis,parameters of variability,and flashiness *** of the duration of ice phenomena(~5.4 y)and ice cover on the lake(~13.5 y)was observed,although both are statistically *** cover duration has been interrupted several times by winter thaws after 1996 whereas no such events had been reported *** trend towards a delayed appearance of ice phenomena reaches 4.0 d·decade^(-1)(pwards an earlier ice phenomena disappearance reaches 5.1 d·decade^(-1)(pwith ice phenomena on Lake Morskie Oko at a rate of 9.0 d·decade^(-1)(pween ice phenomena and ice cover(beginning,end,duration),average annual air temperature,average air temperature of three summer months(June,July,August),and average air temperature of the six months period from June to *** air temperature induces growing heat resources accumulated in the lake water in the summer and autumn seasons,potentially causing later initiation of ice phenomena in the *** is no statistically significant r

关键词： Ice phenomena Lakes High mountains Climate warming East-Central Europe

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Mitigation of spectral leakage for single carrier, block-processing cognitive radio receivers

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Digital Communications and Networks 2018年第2期4卷 106-110页

作者： adam C. Polak Mark wagner Marco F. Duarte Robert w. Jackson Dennis L. Goeckel Electrical and Computer Engineering Department University of Massachusetts Amherst United States

Cognitive Radio （CR） is a multiuser, wireless communication concept that allows for a dynamic and adaptive assignment of spectral resources. The coexistence of multiple users, often transmitting at significantly different power levels, makes CR receivers vulnerable to spectral leakage caused by components＇ nonlinearities and timetruncation of the processed signal records. In this work we propose a method for mitigating the latter with an adaptive choice of the length of the processing block size. with simulations we show that a significant leakage reduction that leads to receiver dynamic range improvement of around 10 dB can be achieved with the proposed method.

关键词： Spectral leakage Dynamic range Single carrier block transmission Interference white space Cognitive radio

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The spatial evolution of velocity and density profiles in an arrested salt wedge

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Theoretical & Applied Mechanics Letters 2019年第6期9卷 403-408页

作者： adam J.K.Yang E.w.Tedford G.A.Lawrence Department of Civil Engineering University of British Columbia

The spatial variation in the properties of an arrested salt wedge have been investigated,both analytically and in the *** the laboratory particle image velocimetry and laser induced fluorescence were used to obtain flow velocities and the height of the density *** analytical solution for the profile of interface height,in the absence of interfacial instabilities,has been developed from two-layer internal hydraulic *** evolution of the velocity profile is predicted using a momentum diffusion equation following a Lagrangian frame of reference along the interface of the salt *** centre of the shear layer is predicted to lie above the density interface,with this offset decreasing in the downstream *** theoretical predictions are in good agreement with our laboratory measurements.

关键词： Arrested salt wedge Internal hydraulics Shear layer Asymmetry

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Effective thermal conductivity estimation using a convolutional neural network and its application in topology optimization

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Energy and AI 2024年第1期15卷 236-247页

作者： Andre adam Huazhen Fang Xianglin Li Department of Mechanical Engineering University of Kansas1530 W 15th St.Lawrence66045KSUSA Department of Mechanical Engineering and Materials Science Washington University in St.LouisOne Brookings DriveSt.Louis63130MOUSA

Topology optimization of heterogeneous structures can find significant use in a wide range of applications,and its fabrication has been made possible by recent advances in additive ***,the optimization procedure is computationally expensive,as each structural update requires the re-evaluation of the *** computational time is the major limiting factor in large-scale and complex structural *** this study,a convolutional neural network(CNN)model for predicting effective thermal conductivity inspired by the VGG networks is *** using 130,000 unique binary images,the model achieves high predictive ***,it shows a mean absolute percent error(MAPE)of 0.35%in testing when the thermal conductivity of the solid is ten times larger than the fluid,and when the thermal conductivities assigned are that of aluminum and water,the MAPE is 2.35%.The prediction time is 15 ms for a single image with 128×128 pixels,which is 3 to 5 orders of magnitude faster than a finite volume *** employed in topology optimization,the CNN retains a MAPE between 0.67%and 11.8%for different *** CNN model correctly predicts trends in effective thermal conductivity and improves the structure to close proximity of a theoretical maximum in all cases.

关键词： Machine learning Effective thermal conductivity Convolutional neural network VGG Numerical heat transfer Topology optimization

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PAT(Periderm Assessment Toolkit):A Quantitative and Large-Scale Screening Method for Periderm Measurements

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Plant Phenomics 2024年第2期6卷 295-308页

作者： Gonzalo Villarino Signe Dahlberg-wright Ling Zhang Marianne Schaedel Lin wang Karyssa Miller Jack bartlett Albert Martin Dang Vu wolfgang Busch Plant Molecular and Cellular Biology Laboratory Salk Institute for Biological StudiesLa JollaCAUSA

The periderm is a vital protective tissue found in the roots,stems,and woody elements of diverse plant *** plays an important function in these plants by assuming the role of the epidermis as the outermost *** its critical role for protecting plants from environmental stresses and pathogens,research on root periderm development has been limited due to its late formation during root development,its presence only in mature root regions,and its impermeability.

关键词： quantitative screening toolkit method assessment large-scale measurements periderm

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Development and actualization of brownfields database with the use of unmanned aerial vehicles-the case of Upper Silesia,Poland

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International Journal of Coal Science & Technology 2022年第6期9卷 168-177页

作者： Aleksandra Zgórska adam Hamerla Jan Bondaruk Pawel Zawartka Department of water Protection Central Mining InstitutePlac Gwarków 144-166 KatowicePoland Deputy Director for Environmental Engineering Central Mining Institute Plac Gwarkow 144-166 KatowicePoland

This paper presents the assumptions and the preliminary results of the project entitled"Extension of the system for man-agement of post-mining areas in the Silesian province-OPI TPP 2.0".The overall objective of the project is to develop and implement a new e-service in the form of an open-access information system on post-mining areas in the Silesia *** range of information and tools planned to be made available is dedicated to assessing the possibilities and potential for economic and social reuse of these *** basic and extremely important stage of the project was to identify and collect data on post-industrial sites located in the Silesia *** information contained in this article illustrates the activities that were carried out in the initial phase of the project in which unmanned aerial vehicles(UAV)were used to identify and acquire information on brownfields(including post-mining sites)entered into the developed common *** article assesses the possibility of using drones in an enterprise of such a large scale and also points out the advantages of using this *** article describes the methodology and scope of work related to the acquisition of data that can be collected using unmanned aerial vehicle(UAV)covering surface infrastructure and land use of brownfields,allowing for the identification of negative phenomena on their site as well as monitoring of naturally occurring *** on fieldworks experience and the results of numerous analyses carried out for different types of brownfields(***-mining areas,former transport bases,settling ponds,etc.),paper presents the advantages and benefits of drones(UAN)over other data sources used to monitor changes in an *** article is based on the results of an inventory of over 600 brownfields located in Upper Silesia region(Silesia Voivodeship,Poland).

关键词： Unmanned aerial vehicle Brownfields Post-industrial sites Databases Drones

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