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ASYMPTOTi. FORMULAE FOR Bi.ARi.TE MELLi. CONVOLUTi.N OPERATORS

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Analysi. i. Theory and Appli.ati.ns 2008年第4期24卷 377-394页

作者： C. Bardaro i. Mantelli.i Uni.ersi.y of Perugi. Italy

i. thi. paper some Voronovskaya approxi.ati.n formulae for a class of Melli. convoluti.n operators of the type （Twf）（x,y）=∫R^2＋Kw（tx^-1,vy^-1）f（t,v）dtdv/tv are gi.en. Moreover, vari.us examples are di.cussed.

关键词： Melli. convoluti.n operator local moment Voronovskaya formula

Synthesi. of Nanostructured Mg-Ni.Alloy and i.s Hydrogen Storage Properti.s

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Journal of Materi.ls Sci.nce & Technology 2012年第5期28卷 401-406页

作者： N.A. Ni.z i. Ahmad Waheed S. Khan S. Tajammul Hussai. Department of Physi.s COMSATS Institute of Information Technology Islamabad Pakistan Research Centre of Materi.ls Sci.nce School of Materials Science and Engineering Beijing Institute of Technology Nati.nal Centre for Physi.s Qaid-a-Azam University Islamabad Pakistan

Nanostructured Mg–Ni.alloy wi.h the parti.le si.e i. the range of 40–50 nm was synthesi.ed by the thermal decomposi.i.n of bi.yri.yl complexes of Mg and Ni.metals at 773 K for 24 h under dry argon gas ambi.nt. The as-prepared nano-alloy was characteri.ed by X-ray di.fracti.n （XRD）, scanni.g electron mi.roscopy （SEM） and transmi.si.n electron mi.roscopy （TEM） for composi.i.nal and structural analysi.. The alloy exhi.i.ed superi.r hydrogen absorpti.n and desorpti.n behavi.r wi.h 3.2 wt% absorpti.n wi.hi. 1 mi. at 573 K and about 3 wt% desorpti.n wi.hi. 5–10 mi. at 573 K. Thi. favorable behavi.r of Mg–Ni.compound for the hydrogen storage i. due to the speci.i. nanostructure of the materi.l. The low acti.ati.n energy values and favorable thermodynami.s i.di.ate that the prepared Mg–Ni.alloy i. an attracti.g materi.l for hydrogen storage appli.ati.ns.

关键词： Mg-Ni.alloy Hydrogen storage Pressure-composi.i.n-temperature (P-C-T) measurements Transmi.si.n electron mi.roscopy

Synthesi. and Physi.o-chemi.al Properti.s of (Co)polymers of 2-[(2E)-1-methyl-2-buten-1-yl]ani.i.e and Ani.i.e

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Chi.ese Journal of Polymer Sci.nce 2019年第8期37卷 774-782页

作者： A. Andri.anova A. Shi.apova Y. Bi.lova R. Sali.hov i. Abdrakhmanov A. Mustafi. Ufa i.sti.ute of Chemi.try Russian Academy of Sciences October Av 71 Ufa 450054 Russia Bashki. State Uni.ersi.y Z. Validi St 32 Ufa 450076 Russia

A new soluble polymer on 2-[(2 E)-1-methyl-2-buten-1-yl]ani.i.e and i.s copolymers wi.h ani.i.e basi. have been synthesi.ed i. vari.us molar rati.s. For all samples, the electri.al conducti.i.y, morphology, solubi.i.y, electrochemi.al properti.s, as well as spectral and molecular mass characteri.ti.s have been studi.d, and a comparati.e analysi. wi.h polyani.i.e has been carri.d out. The substi.uent i.troduced i.to the ani.i.e aromati. ri.g si.ni.i.antly i.proves the solubi.i.y i. typi.al organi. solvents of a hi.h molecular wei.ht product. The morphology of the test compounds depends on the co-monomer rati.. As the content of the substi.uted ani.i.e i. the i.i.i.l mi.ture i.creases, the morphology of the polymer changes from the i.herent polyani.i.e fi.rous mi.rostructure to the globular one wi.h i.regular substi.uted polyani.i.e shapes and si.es. Electrochemi.al study of the samples revealed that the hi.her the oxi.ati.n potenti.l, the wi.er the band gap(rangi.g from 2.00 to 2.15). The electri.al conducti.i.y decreases i. proporti.n to the i.crease i. the substi.uted ani.i.e concentrati.n of the i.i.i.l co-monomer mi.ture and amounts to 12.5–35.7 × 10~6 nSm.

关键词： Polyani.i.e 2-[(2E)-1 -methyl-2-buten-1 -yl]ani.i.e Copolymers Solubi.i.y Electrochemi.al properti.s Electri.al conducti.i.y

Tri.ologi.al Characteri.ati.n of Commerci.l Pure Ti.ani.m Processed by Multi.Di.ecti.nal Forgi.g

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Acta Metallurgi.a Si.i.a(Engli.h Letters) 2019年第7期32卷 857-868页

作者： i. Ansari.n M. H. Shaeri.M. Ebrahi.i.P. Mi.ari. Department of Materi.ls Sci.nce and Engi.eeri.g Imam Khomeini International University (IKIU) P.O. Box 34148-9681 & Qazvin Iran Department of Mechani.al Engi.eeri.g Faculty of Engineering University of Maragheh P.O. Box 55136-533 Maragheh Iran Department of Physi.s of Materi.ls Faculty of Mathematics and Physics Charles University Prague Czech Republic

Thi. work di.cusses tri.ologi.al properti.s of commerci.l pure (CP) ti.ani.m processed by multi.di.ecti.nal forgi.g (MDF) up to si. passes at room temperature and 220 ℃. For thi. purpose, wear test was conducted by dry sli.i.g pi.-on-di.k method on the i.i.i.l and ultrafi.e grai.ed samples usi.g di.ferent stress magni.udes of 1, 1.5 and 2 MPa. The results showed that wear resi.tance of CP ti.ani.m i.creases after the fi.st pass of MDF i. compari.on wi.h the i.i.i.l condi.i.n, i.respecti.e of the appli.d normal stress. For example, the average wear rate of MDFed samples was decreased about 30% and 24%, after fi.st pass at room temperature and 220 ℃, respecti.ely. However, average wear rate of the samples processed by si. MDF passes was reduced about 40% at lower normal loads;i. was i.creased about 9% at hi.her ones as compared to the i.i.i.l condi.i.n. i. was also found that the domi.ated wear mechani.ms were abrasi.e and delami.ated at the lower stresses, whi.e the delami.ati.n mechani.m was i.tensi.i.d and a sli.ht adhesi.n was observed duri.g the hi.her appli.d normal loads.

关键词： Multi.di.ecti.nal forgi.g Commerci.l pure ti.ani.m Tri.ologi.al behavi.r Wear mechani.ms

Geomechani.al moni.ori.g of rock's massi.e i. zones of breaks

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中国有色金属学会会刊：英文版 2005年第S1期15卷 275-278页

作者： M. A. Zhuravkov S. i. Bogdan M. A. Kovaleva Belarus State Uni.ersi.y Minsk 220050 BelarusBelarus State University Minsk 220050 BelarusBelarus State University Minsk 220050 Belarus

For safe development of underground space and especi.lly i. areas of geologi.al i.fri.gements i. i. necessary to creat effecti.e system of tracki.g, forecasti.g and management for deformi.g processes i. such areas-system of geomechani.al moni.ori.g. Besi.es i. i. necessary to study and i.agi.e the i.ternal mechani.m of deformi.g processes i. such speci.l zones. i. the paper some basi. aspects of creati.n of geomechani.al moni.ori.g systems for reali.ati.n of supervi.i.n, study and modelli.g of deformi.g processes, for modelli.g and study of the stress-strai. state of massi. i. areas of large-scale underground mi.i.g works i. vi.w of a block-hi.rarchi.al structure of rock’s massi.e (presence of geologi.al i.fri.gements) are consi.ered. i. parti.ular such i.portant tasks, as research of deformi.g processes i. areas of geologi.al i.fri.gements wi.h the help of GPS-technologi.s and use of the recei.ed results for the modeli.g; constructi.n of models adequately descri.i.g a condi.i.n of rock’s massi.e i. area of geologi.al i.fri.gement. Some results of researches on study of cavi.i.s i.fluence on occurrence of an area of li.i.i.g condi.i.ns i. regi.n of geologi.al i.fri.gement and possi.le shi.t along i.fri.gement are submi.ted.

关键词： geologi.al i.fri.gement shi.t di.placement stress-strai. state

Evoluti.n of a flexi.le rule for foragi.g that copes wi.h envi.onmental vari.ti.n

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Current Zoology 2015年第2期61卷 303-312页

作者： Andrew D. Hi.Gi.SON Ti. W. FAWCETT Alasdai. i. HOUSTON School of Bi.logi.al Sci.nces Life Sciences Building University of Bristol 24 Tyndall Avenue Bristol BS8 1TQ U.K.

Models of adapti.e behavi.ur typi.ally assume that ani.als behave as though they have hi.hly complex, detai.ed strategi.s for maki.g deci.i.ns. i. reali.y, selecti.n favours the opti.al balance between the costs and benefi.s of complexi.y. Here we i.vesti.ate thi. trade-off for an ani.al that has to deci.e whether or not to forage for food - and so how much energy reserves to store - dependi.g on the food avai.abi.i.y i. i.s envi.onment. We evolve a deci.i.n rule that controls the target reserve level for di.ferent ranges of food avai.abi.i.y, but where i.creasi.g complexi.y i. costly i. that metaboli. rate i.creases wi.h the sensi.i.i.y of the rule. The evolved rule tends to be much less complex than the opti.al strategy but performs almost as well, whi.e bei.g less costly to i.plement. i. achi.ves thi. by bei.g hi.hly sensi.i.e to changi.g food avai.abi.i.y at low food abun- dance - where i. provi.es a close fi. to the opti.al strategy - but i.sensi.i.e when food i. plenti.ul. When food avai.abi.i.y i. hi.h, the target reserve level that evolves i. much hi.her than under the opti.al strategy, whi.h has i.pli.ati.ns for our under- standi.g of obesi.y. Our work hi.hli.hts the i.portant pri.ci.le of generali.abi.i.y of si.ple deci.i.n-maki.g mechani.ms, whi.h enables ani.als to respond reasonably well to condi.i.ns not di.ectly experi.nced by themselves or thei. ancestors.

关键词： Behavi.ural mechani.ms Fat storage Fluctuati.g envi.onments Generali.ati.n Obesi.y Rule of thumb

Synthesi. and characteri.ati.n of yttri.m-alumi.um-i.on and yttri.m-ceri.m-i.on ci.ri. complexes

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Journal of Rare Earths 2008年第3期26卷 307-314页

作者： N. Petrova D. Todorovsky1 i. Mi.ov G. Tyuli.v Faculty of Chemi.try University of Sofia 1 J. Bourchier Blvd. Sofia 1164 Bulgaria i.sti.ute of Catalysi. Bulgarian Academy of Sciences Acad. G. Bonchev Str. bl. 11 Sofia 1113 Bulgaria

Fe-, Y-Fe-Al- and Y-Ce-Fe- ci.rates were synthesi.ed i. ethylene glycol （EG） medi.m under condi.i.ns si.i.ar to those used i. the polymeri.ed complex method. Thei. elemental composi.i.n, i.,^ 13C and ^1H NMR, X-ray photoelectron and Mossbauer spectra were studi.d, and formulae descri.i.g thei. composi.i.n were proposed. The complexes contai.ed EG bonded as adduct and ester wi.h ci.ri. aci. li.and and di. not contai. li.ands wi.h deprotonated alcoholi. groups. The complexes consi.ted of agglomerated spheres, 0.7-3 μm i. di.meter. The local composi.i.n of the products was establi.hed by energy di.persi.e X-ray mi.roanalysi.. The compari.on of the number of the li.ands, thei. average electri.al charge and the esteri.i.ati.n degree of mono-, di. and tri.etalli. complexes proved the mi.ed-metal nature of the speci.s studi.d. The thermal decomposi.i.n of the complexes was studi.d and a general scheme of the processes taki.g place was proposed. Hi.hly crystalli.e, phase homogeneous YaFe4AlO12 was produced after heati.g the respecti.e complex at 1000 ℃. Ce-doped yttri.m-i.on garnet, si.i.arly prepared, contai.ed traces of CeO2.

关键词： garnets polymeri.ed complex method Mossbauer spectroscopy thermal analysi. NMR-spectroscopy rare earths

Comparati.e analysi. of cerami.-carbonate nanocomposi.e fuel cells usi.g composi.e GDC/NLC electrolyte wi.h di.ferent perovski.e structured cathode materi.ls

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Fronti.rs of Chemi.al Sci.nce and Engi.eeri.g 2018年第1期12卷 162-173页

作者： Muhammad i. Asghar Sakari.Lepi.ko Janne Patakangas Janne Halme Peter D. Lund New Energy Technologi.s Group Department of Applied Physics Aalto University P.O. BOX 15100 FI-00076 Aalto Finland

A comparati.e analysi. of perovski.e structured cathode materi.ls, La0.65Sr0.35Mn03 （LSM）, La0.8Sr0.2CoO3 （LSC）, La0.6Sr0.4FeO3 （LSF） and La0.6Sr0.4Co0.2Fe0.803 （LSCF）, was performed for a cerami.-carbonate nanocomposi.e fuel cell usi.g composi.e electrolyte consi.ti.g of Gd0.1Ce0.9O1.95 （GDC） and a eutecti. mi.ture of Na2CO3 and Li.CO3. The compati.i.i.y of these nanocomposi.e electrode powder materi.ls was i.vesti.ated under ai., CO2 and ai./CO2 atmospheres at 550 ℃. Mi.roscopy measurements together wi.h energy di.persi.e X-ray spectroscopy （EDS） elementary analysi. revealed few spots wi.h hi.her counts of manganese relati.e to lanthanum and stronti.m under pure CO2 atmosphere. Furthermore, electrochemi.al i.pedance （Ei.） analysi. showed that LSC had the lowest resi.tance to oxygen reducti.n reacti.n （ORR）（14.12 Ω·cm^2） followed by LSF （15.23 Ω·cm^2）, LSCF （19.38Ω·cm^2） and LSM （〉 300 Ω·cm^2）. i. addi.i.n, low frequency Ei. measurements （down to 50 gHz） revealed two addi.i.nal semi.ci.cles at frequenci.s around 1 Hz. These semi.i.cles can yi.ld addi.i.nal i.formati.n about electrochemi.al reacti.ns i. the devi.e. Fi.ally, a fuel cell was fabri.ated usi.g GDC/NLC nanocomposi.e electrolyte and i.s composi.e wi.h Ni. and LSCF as anode and cathode, respecti.ely. The cell produced an excellent power densi.y of 1.06 W/cm^2 at 550 ℃ under fuel cell condi.i.ns.

关键词： electrode fuel cell low-temperature nano- composi.e perovski.e

Si.pli.i.d approach for desi.n of raft foundati.ns agai.st fault *** i.free-fi.ld

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Earthquake Engi.eeri.g and Engi.eeri.g Vi.rati.n 2008年第2期7卷 147-163页

作者： i. Anastasopoulos N. Gerolymos G. Gazetas M. F. Bransb School of Ci.i. Engi.eeri.g National Technical University of AthensGreece Civil LecturerEngineeringUniversity of DundeeScotlandUK School of Ci.i. Engi.eeri.g National Technical University of AthensGreece Ci.i. Engi.eeri.g University of DundeeScotlandUK

Over the past few decades, earthquake engi.eeri.g research mai.ly focused on the effects of strong sei.mi. shaki.g. After the 1999 earthquakes i. Turkey and Tai.an, and thanks to numerous cases where fault rupture caused substanti.l damage to structures, the i.portance of faulti.g-i.duced deformati.n has re-emerged. Thi. paper, along wi.h i.s compani.n （Part Ⅱ）, exploi.s parametri. results of fi.i.e element analyses and centri.uge model testi.g i. developi.g a four-step semi.analyti.al approach for analysi. of di.-sli. （normal and thrust） fault rupture propagati.n through sand, i.s emergence on the ground surface, and i.s i.teracti.n wi.h raft foundati.ns. The present paper （Part Ⅰ） focuses on the effects of faulti.g i. the absence of a structure （i.e., i. the free-fi.ld）. The semi.analyti.al approach compri.es two-steps： the fi.st deals wi.h the rupture path and the esti.ati.n of the locati.n of fault outcroppi.g, and the second wi.h the tectoni.ally- i.duced di.placement profi.e at the ground surface. i. both cases, si.ple mechani.al analogues are used to deri.e si.pli.i.d semi.analyti.al expressi.ns. Centri.uge model test data, i. combi.ati.n wi.h parametri. results from nonli.ear fi.i.e element analyses, are uti.i.ed for model cali.rati.n. The deri.ed semi.analyti.al expressi.ns are shown to compare reasonably well wi.h more ri.orous experi.ental and theoreti.al data, thus provi.i.g a useful tool for a fi.st esti.ati.n of near-fault sei.mi. hazard.

关键词： fault rupture semi.analyti.al expressi.n soi.-structure i.teracti.n earthquake

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