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Flood prediction and assessment of vulnerability risk in the southern coasts of the Caspian Sea

International journal of Digital Earth 2008年第3期1卷 291-303页

作者： S.Shataee j.m.lek Gorgan University of Agriculture Sciences and Natural Resources GorganIran Caspian Sea National Research Center SariIran

The southern part of the Caspian Sea shoreline in Iran with a length of 813 km has different topographic *** to sea fluctuation,these zones have various dimensions in different *** the last years,the Caspian Sea experienced enormous destructive *** historical information and tidal gauge measurements showed different ranges of sea rise from30 m to22 m from the mean sea *** the other hand,the probable flooding zone is related to slope gradient of *** help the determination of the probable flooding area owing to sea level rises,the coastal zones can be modelled using geographic information system(GIS)environment as vulnerability risk *** rates would be useful for making decisions in coastal management *** study examined different scenarios of sea rise to determine hazard-flooding rates in the coastal cities of the mazandaran province and classified them based on vulnerability risk *** 1:2000 scale topographic maps of the coastal zones were prepared to extract topographic information and construct the coastal digital elevation *** the presumption of half-metre sea rise scenarios,the digital elevation models classified eight scenarios from26 to22 *** flooding areas in each scenario computed for 11 cities *** vulnerability risk rate in each rise scenario was computed by dividing the flooded area of each scenario to city *** results showed that in the first four scenarios,from26 to24 m,the Behshahr,joibar,Neka and Babolsar cites would be more vulnerable than other ***,for the second four scenarios from24 to22 m sea level rise scenario,only the coastal area of Chalous city would be *** was also observed that the coastal region of Behshahr would be critical in total *** studies would be necessary to complete this assessment by considering social-economic and land use information to estimate the exact hazardous and vulnerable zones.

关键词： Caspian Sea flood prediction fluctuation rise scenario vulnerability risk assessment

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Occurrence,leaching,and mobility of major and trace elements in a coal mining waste dump:The case of Douro Coalfield,Portugal

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Energy Geoscience 2021年第2期2卷 121-128页

作者： j.Ribeiro D.Flores Department of Earth Sciences University of CoimbraRua Silvio Lima3030-790CoimbraPortugal Institute of Earth Sciences-Porto Pole Rua Do Campo Alegre 6874169-007PortoPortugal Environment and Spatial Planning Department of GeosciencesUniversity of PortoRua Do Campo Alegre 6874169-007PortoPortugal

The coal mining residues from past mining activities in the Douro Coalfield are emplaced in many dumps near the mining areas,causing substantial environmental *** study aims to contribute to the investigation of environmental impacts caused by the disposal of the residue in the Douro Coalfield through the determination of the geochemical composition of waste materials collected at 3 e 15 m depth,and of the water-leachable fraction produced by percolation in these materials inside the *** elements with higher concentration in the leachates are Ca,Cd,Co,mg,mn,Na,Ni,S,and Zn,indicating that they are the most easily leached and accessible elements for percolation and mobilization into the *** presence of these elements in the leachates is principally attributed to their occurrence as water-soluble ions in clays and sulphides affected by natural weathering conditions,which promotes their breakdown and occurrence as exchangeable *** leachates are classified as acid *** weathering and leaching in the Sao Pedro da Cova waste dump are the principal~paths for chemical elements to be percolated and mobilized to environment,posing risk to the soils,waters and ecosystems in the surrounding areas.

关键词： Coal mining Waste dump Water-soluble compound Hazardous element

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ICRF Heated Long-Pulse Plasma Discharges in LHD

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Plasma Science and Technology 2006年第1期8卷 28-32页

作者： R. KUmAZAWA T. SEKI T. mUTOH K. SAITO T. WATARI Y. NAKAmURA m. SAKAmOTO T. WATANABE S. KUBO T. SHImOZUmA Y. YOSHImURA H. IGAmI Y. TAKEIRI Y. OKA K. TSUmORI m. OSAKABE K. IKEDA K. NAGAOKA O. KANEKO j. mIYAZAWA S. mORITA K. NARIHARA m. SHOjI S. mASUZAKI m. GOTO T. mORISAKI B. j. PETERSON K. SATO T. TOKUZAWA N. ASHIKAWA K. NISHImURA H. FUNABA H. CHIKARAISHI T. NOTAKE Y. TORII H. OKADA m. ICHImURA H. HIGAKI Y. TAKASE H. KASAHARA F. SHImPO G.NOmURA C.TAKAHASHI m.YOKOTA A. KATO 赵燕平 j. S. YOON j. G. KWAK H. YAmADA K. KAWAHATA N. OHYABU K. IDA Y. NAGAYAmA N. NODA A. KOmORI S. SUDO O. mOTOj.m. National Institute for Fusion Science Toki Japan Kyusyu University Kasuga Japan Nagoya University Faculty of Engineering Nagoya Japan Kyoto University Institute of Advanced Energy Uji Japan Tsukuba University Plasma Research Center Tsukuba Japan Tokyo University Graduate School of Frontier Sciences Tokyo Japan Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China KAERI 150 Deogjin-dong Yuseong-gu Daejeon Korea Rep.

A long-pulse plasma discharge for more than 30 min. was achieved on the Large Helical Device （LHD）. A plasma of ne = 0.8 × 10^19 m^-3 and T10 = 2.0 keV was sustained with PICH = 0.52 mW, PECH = 0.1 mW and averaged PNBI = 0.067 mW. Total injected heating energy was 1.3 G j, which was a quarter of the prepared RF heating energy. One of the keys to the success of the experiment was a dispersion of the local plasma heat load to divertors, accomplished by shifting the magnetic axis inward and outward.

关键词： helical/stellarator configuration ICRF heating steady state operation

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Exact Artificial Boundary Condition for the Poisson Equation in the Simulation of the 2D Schrodinger-Poisson System

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Communications in Computational Physics 2014年第8期16卷 764-780页

作者： Norbert j.m.user Yong Zhang Wolfgang Pauli Institute c/o Fak.mathematik University WienOskar-Morgenstern-Platz 11090 ViennaAustria.

We study the computation of ground states and time dependent solutions of the Schr¨odinger-Poisson system(SPS)on a bounded domain in 2D(*** two space dimensions).On a disc-shaped domain,we derive exact artificial boundary conditions for the Poisson potential based on truncated Fourier series expansion inθ,and propose a second order finite difference scheme to solve the r-variable ODEs of the Fourier *** Poisson potential can be solved within O(m NlogN)arithmetic operations where m,N are the number of grid points in r-direction and the Fourier *** with the Poisson solver,a backward Euler and a semi-implicit/leap-frog method are proposed to compute the ground state and dynamics *** results are shown to confirm the accuracy and *** we make it clear that backward Euler sine pseudospectral(BESP)method in[33]can not be applied to 2D SPS simulation.

关键词： 2D Schrodinger-Poisson system exact artificial boundary condition backward Euler scheme semi-implicit/leap-frog scheme backward Euler sine pseudospectral method.

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TOXICITY OF TWO HERBICIDES 2,4-D DImETHYLAmINE AND BENSULFURON mETHYL TO RICE FIELD CHIRONOmUS KIIENSIS (TOKUNAGA) (DIPTERA:CHIRONOmIDAE)

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湿地科学 2006年第4期4卷 241-246页

作者： Al-Shami S A Che Salmah m R Siti Azizah m N Abu Hassan A Azmi m School of Biological Sciences Universitiy Sains Malaysia 11800 Penang Malaysia malaysian Agricultural Research and Development Institute Bertam 13200 Seberang Perai Malaysia

Fourth instar larvae of Chironomus kiiensis (Tokunaga) were exposed to various concentrations of two commonly used herbicides: 2,4 - D Dimethylamine and Bensulfuron methyl in the rice fields. The bioassay experiment was carried out in a rearing unit in the laboratory at a room temperature ((27 ±2) °C). A thin layer of sand sediments and tissue papers were provided as substrate in each unit. Each concentration of all herbicides was prepared in 250 mL distilled water. The experiment was performed in triplicate and 20 chironomid larvae were placed in each rearing unit. The larvae were fed with fish food (Sanyuichiban®) at 2 d intervals and all units were aerated by air pumps. The experiment was monitored every 24 h for mortality of C. kiiensis. The 2,4 - D Dimethylamine bioassay was carried out for 24 h while Bensulfuron methyl was run for 72 h. Dead larvae, pupae and living or dead adults were counted and removed daily. The LC50 of 2,4 - D Dimethylamine was 2 638 mg ai L-1, more than 2 000 times higher than the recommended dose of 0.753 mg ai L-1 used for controlling weeds in the rice field. Bensulfuron methyl was more toxic than the 2,4 - D Dimethylamine. The LC 50 of the Bensulfuron methyl was recorded at 1.29 mg ai L -1, and approximately was more 20 times than that of the recommended dose of 0.057 mg ai L-1. Bensulfuron methyl was found to be slow acting. The mortality of the larvae was only observed after 72 h. However, this herbicide interfered with the emergence of C. kiiensis to adults at and above the recommended dose used in the rice fields. Based on their LC50 values, this study showed that applying these herbicides in the rice fields at doses recommended by the manufacturers was safe for C. kiiensis and presumably to other living organisms in the water.

关键词： chironomidae Chironomus kiiensis herbicides 2,4-D Dimethylamine Bensulfuron methyl

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Design Curves for mooring Lines of Turret mooring Systems

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China Ocean Engineering 1997年第4期12卷 387-392页

作者： Gao, j Tan, jH Chen, XH Shanghai jiao Tong Univ Shanghai 200030 Peoples R China

This paper presents a series of design curves to aid in the selection of turret mooring systems for tankers based Floating Production Storage and Offloading (FPSO) systems. These curves are appropriate to water depths ranging from 100 m to 600 m. The curves can be used as a preliminary design tool, allowing the designer to quickly evaluate alternative mooring system configurations, including the number of mooring lines, the characteristics of chain and wire rope to be deployed and the. initial tension. With a knowledge of the total environmental force and vessel motion characteristics, the designer can determine the appropriate system for closer evaluation.

关键词： turret mooring system mooring line design curve preliminary design

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无边界职业生涯时代的就业能力:一种新的心理契约

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心理科学 2006年第2期29卷 485-486页

作者：郭志文 B.I.j.m.范.德.赫登湖北大学商学院武汉430062 马斯特里赫管理学院

在无边界职业生涯时代,以雇员忠诚换取就业保障为特征的心理契约,正逐步被以绩效换取就业能力为特征的新的心理契约所取代。基于就业能力的心理契约管理要求组织通过沟通了解员工的期望和态度,给员工以更多的知识积累和学习机会,实施合... 详细信息

在无边界职业生涯时代,以雇员忠诚换取就业保障为特征的心理契约,正逐步被以绩效换取就业能力为特征的新的心理契约所取代。基于就业能力的心理契约管理要求组织通过沟通了解员工的期望和态度,给员工以更多的知识积累和学习机会,实施合理的组织策略,提升员工的就业能力。

关键词：无边界职业生涯就业能力心理契约通用技能

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Towards high degree of c-axis orientation in mgB_(2) bulks

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journal of magnesium and Alloys 2022年第8期10卷 2173-2184页

作者： m.A.Grigoroscuta G.V.Aldica m.Burdusel V.Sandu A.Kuncser I.Pasuk A.m.Ionescu T.S.Suzuki O.Vasylkiv P.Badica National Institute of materials Physics 405A Street AtomistilorMagurele 077125Romania National Institute for materials Science 1-2-1 SengenIbarakiTsukuba 305-0047Japan

The paper presents fabrication and characterization of spark plasma sintered textured(001) mgB_(2)with a record degree of orientation of about 40% and 16% by high-energy ultra-sonication and slip casting in high magnetic field(12 T) and 0 T magnetic field, *** characterization was performed by X-ray diffraction, and electron microscopy. The analysis revealed unexpected preferred orientation also in the mgO secondary phase due to the epitaxial growth of(111) mgO on(001) mgB_(2). The influence of oriented microstructure on the superconducting characteristics expressed by critical current density(j_(c)), irreversibility field(H_(irr)), and on the pinning properties were assessed. High anisotropy versus sample orientation in applied magnetic field, H, was observed for j_(c), Hirr, pinning activation energy(U^(*))extracted from relaxation measurements. The zero-field critical current, j_(c0)and F_(p),maxare weakly or not dependent on the direction of H,while the other indicated parameters are significantly influenced. Results enable control of superconducting parameters by further optimization of microstructure through mgB_(2) texturing as a novel and viable strategy for development of bulk mgB2with enhanced properties when taking advantage of its anisotropy.

关键词： Textured mgB_(2)bulk Slip casting Spark plasma sintering Critical current density Pinning force Pinning activation energy

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Tailoring the degradation rate of magnesium through biomedical nano-porous titanate coatings

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journal of magnesium and Alloys 2021年第1期9卷 336-350页

作者： matthew D.Wadge j.m.e mcGuire Benj.m.n V.T.Hanby Reda m.Felfel Ifty Ahmed David m.Grant Advanced materials Research Group Faculty of EngineeringUniversity of NottinghamNG72RD United Kingdom Physics Department Faculty of ScienceMansoura UniversityMansoura 35516Egyp

A novel approach was developed to reduce the corrosion rate of magnesium(mg)metal,utilising titanate *** sputtering was used to deposit ca.500 nm titanium(Ti)coatings onto pure mg discs,followed by hydrothermal conversion and ion exchange reactions to produce sodium and calcium titanate *** confirmed the characteristic nanoporous structure of sodium and calcium titanate,with thicknesses ranging from ca.0.8 to 1.4μ*** analysis confirmed the presence of Ti^(4+)-O,Na-O,and Ca-O bonding,whilst Raman spectroscopy demonstrated characteristic vibrational modes(such as TiO 6 octahedral vibrations)of the sodium and calcium titanate perovskite ***,corrosion studies through potentiodynamic polarisation measurements demonstrated the NB/NH CaTC samples to be superior in reducing mg degradation,compared to other samples tested,through an increase in E_(corr)from-1.49 to-1.33 V,and the reduction in corrosion current density,i corr,from 0.31 to 0.06 mA/cm^(2)for mg and NB/NH CaTC samples,*** was a clear trend noted for the NB/NH samples,which showed an increase in E corr to more positive values in the following order:mg

关键词： magnesium degradation Titanate Biodegradable Ion exchange Electrochemical corrosion magnetron sputtering

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magnetic Helical micro-and Nanorobots:Toward Their Biomedical Applications

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Engineering 2015年第1期1卷 21-26页

作者： Famin Qiu Bradley j.Nelson Institute of Robotics and Intelligent Systems(IRIS) ETH Zurich

magnetic helical micro- and nanorobots can perform 3D navigation in various liquids with a sub- micrometer precision under low-strength rotating magnetic fields （〈 10 rer）. Since magnetic fields with low strengths are harmless to cells and tissues, magnetic helical micro/ nanorobots are promising tools for biomedical applications, such as minimally invasive surgery, cell manipulation and analysis, and targeted therapy. This review provides general information on magnetic helical micro/nanorobots, including their fabrication, motion control, and further functionalization for biomedical applications.

关键词： magnetic helical micro/nanorobots mobilemicro/nanorobots artificial bacterial flagella (ABFs) functionalization biomedical applications

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