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Characterization of Arithmetic functions that Preserve the Sum-of-squares Operation

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Acta Mathematica Sinica,English Series 2014年第4期30卷 689-695页

作者： Bojan baI Department of Mathematics and Informatics University of Novi Sad

We characterize all functions f ： N → C such that f（m^2 ＋ n^2） = f（m）^2 ＋ f（n）^2 for all m, n ∈ N. It turns out that all such functions can be grouped into three families, namely f ≡ 0, f（n） = ±n （subject to some restrictions on when the choice of the sign is possible） and f（n） =±l/2（again subject to some restrictions on when the choice of the sign is possible）.

关键词： Arithmetic function functional equation sum of squares

Effect of mineral admixtures and repeated loading on chloride migration through concrete

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第9期11卷 683-690页

作者： Wu-man ZHANG Heng-jing ba School of Transportation Science and Engineering Beihang University Beijing 100191 China School of Civil Engineering Harbin Institute of Technology Harbin 150006 China

The effect of fly ash (fA) and ground granulated blast furnace slag (GGBfS) on chloride migration through concrete subjected to repeated loading was examined. Portland cement was replaced by three percentages (20%, 30%, and 40%) of mineral admixtures. five repeated loadings were applied to concrete specimens using a WHY series fully automatic testing machine. The maximum loadings were 40% and 80% of the axial cylinder compressive strength (f′c). Chloride migration through concretes was evaluated using the rapid chloride migration test and the chloride concentration in the anode chamber was measured. The results showed that the replacement percentages of mineral admixtures, the curing time and repeated loading had a significant effect on chloride migration through concrete. The transport number of chloride through concrete cured for 28 d increased with increasing fA replacement and markedly decreased with extension of the curing time. 20% and 30% GGBfS replacement decreased the transport number of chloride through concrete, but 40% GGBfS replacement increased the transport number. five repeated loadings at 40% or 80% f′c increased the transport number of chloride for all mixes.

关键词： Concrete fly ash (fA) Ground granulated blast furnace slag (GGBfS) Chloride migration Repeated loading

On the Space bv_p(f) of Sequences of p-bounded Variation of fuzzy Numbers

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Acta Mathematica Sinica,English Series 2008年第7期24卷 1205-1212页

作者： zer TALO feyzi ba■AR fatih niversitesi Fen-Edebiyat FakltesiMatematik BlmBykekmece Kamps 34500-stanbulTrkiye

Recently, the space bvp of real or complex numbers consisting of all sequences whose differences are in the space lp has been studied by basar, Altay [Ukrainian Math. J. 55（1）（2003）, 136-147], where 1 ≤ p ≤ ∞. The main purpose of the present paper is to introduce the space bvp（f） of sequences of p-bounded variation of fuzzy numbers. Moreover, it is proved that the space bvp（f） includes the space lp（f） and also shown that the spaces bvp（f） and lp（f） axe isomorphic for 1 ≤ p ≤∞. furthermore, some inclusion relations have been given.

关键词： sequence of fuzzy numbers space of difference sequences isomorphic spaces and inclusion relations

Study and Application of Polarographic Catalytic Wave of Chlordiazepoxide in the Presence of Persulfate

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Chinese Journal of Chemistry 2002年第5期20卷 502-508页

作者： Guo, W Lin, H Liu, LM Guo, za Song, Jf NW Univ Xian Dept Chem Xian 710069 Peoples R China Yuxi Normal Coll Dept Chem Yunnan 653100 Peoples R China

Polarographic catalytic wave of chlordiazepoxide in the presence of K 2S 2O 8 was studied in aqueous and DMf/H 2O mixed solutions. The results showed that a single reduction wave in alkaline medium was the reduction of the N=C bond in 1,2 position of chlordiazepoxide via an intermediate free radical in two one electron successive additions. When K 2S 2O 8 was present, the free radical of the N=C bond was oxidized to regenerate the original, producing a parallel catalytic wave of chlordiazepoxide. It was determined that the apparent rate constant k f of the oxidation reaction was 3.2×10 3 mol -1 ·L·s -1 . Using the catalytic wave the trace of chlordiazepoxide can be determined by linear potential scan polarography. In NH 3/NH 4Cl (pH 10.2±0.1, 0.12 mol/L)/K 2S 2O 8 (0.016 mol/L) supporting electrolyte, the second order derivative peak current of the catalytic wave was rectilinear to chlordiazepoxide concentration in the range of 3.20×10 -8 -1.60×10 -7 , 1.60×10 -7 -1.44×10 -6 and 1.44 ×10 -6 -1.44×10 -5 mol/L, respectively. The limit of detection was 9.0×10 -9 mol/L.

关键词： chlordiazepoxide persulfate polarographic catalytic wave free radical

Liver injury associated with Malva grandifolia

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Hepatobiliary & Pancreatic Diseases International 2010年第4期9卷 443-444页

作者： Ekiz f Yüksel  ba■ar  oban ■ Yüksel O Teber MA Department of Gastroenterology Diskapi Yildirim Beyazit Educational and Research Hospital Department of Radiology Ankara Etlik Ihtisas Educational and Research Hospital

To the Editor: Dietary supplements and herbal products are an increasingly common source of drug-induced liver injury. An increasing number of case reports have suggested causative supplement-associated liver toxicity. [1] Malva grandifolia is a plant which is frequently found in flower and vegetable gardens (fig.). Mallow products are used

关键词： Liver injury associated with Malva grandifolia

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家禽肉品质评估方法研究进展

中国家禽 2011年第17期33卷 37-42页

作者： M.Petracci E.baéza 黄正洋(译) 意大利博洛尼亚大学法国农业科学研究院不详

目前,基于不同的原理和设备发展起来的许多方法可用于检测家禽肉品质。当采用这些方法进行检测时,特别要注意分析前的样品准备和分析时的操作标准化。鉴于屠宰后禽肉加工的复杂性以及质量特性,不同的研究和实验室获得的结果并不总是一... 详细信息

目前,基于不同的原理和设备发展起来的许多方法可用于检测家禽肉品质。当采用这些方法进行检测时,特别要注意分析前的样品准备和分析时的操作标准化。鉴于屠宰后禽肉加工的复杂性以及质量特性,不同的研究和实验室获得的结果并不总是一致。因此,为了便于比较,所有研究者都需严格遵从相同的测量程序(标准),文章对家禽肉品质化学和物理物性的检测方法进行综述。

关键词：家禽肉品质评估

Synergistically enhancing cycleability and rate performance of sodium titanate nanowire anode via hydrogenation and carbon coating for advanced sodium ion batteries

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Rare Metals 2022年第12期41卷 4075-4085页

作者： De-Liang ba Wei-Hua Zhu Yuan-Yuan Li Jin-Ping Liu School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China School of Chemistry Chemical Engineering and Life ScienceState Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China State Center for International Cooperation on Designer Low-Carbon and Environmental Materials and School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China

Layered alkali-metal titanate materials are considered as attractive anodes for sodium ion batteries due to their favorable safety and low ***,their practical implementation faces major challenges of low electronic conductivity and inevitable volume variation during Na^(+)intercalation and de-intercalation,which are generally difficult to conquer by a single modification ***,a synergistic ally enhancing strategy to promote the electrochemical performance of Na_(2)Ti_(2)O_(5)nanowire array anode via simultaneous hydrogenation and carbon coating is *** leads to partially reduced titanium;together with conductive carbon layer,it endows Na_(2)Ti_(2)O_(5)with fast electron transport and structural *** resulting H-Na_(2)Ti_(2)O_(5)@C anode exhibits enhanced rate capability(8.0C,165 mAh·g^(-1))and stable cycle performance up to 1000 times in sodium-ion half-cells(the capacity of H-Na_(2)Ti_(2)O_(5)without carbon fades drastically after only 100 cycles).In addition,a newcoupling full cell is further designed with graphene hybridized high-voltage Na_(3)(VO_(0.5))_(2)(PO4)_(2)f_(2)as cathode,capable of delivering a high specific energy density of 212.1 Wh·kg^(-1)(based on the mass of both anode and cathode)and good rate and cycling *** work may offer inspiration for synergistic optimization of electrode materials for advanced electrochemical energy storage devices.

关键词： Sodium ion batteries(SIBs) Na2Ti2O5 nanowire Hydrogenation Carbon coating Enhanced performance

Effect of glass removal on the GMI effect of Co_(71.8)fe_(4.9)Nb_(0.8)Si_(7.5)B_(15) amorphous glass-covered wires

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Rare Metals 2006年第z1期25卷 633-636页

作者： CHEN Zheng ba Shan LI Deren LU Zhichao ZHOU Shaoxiong Central Iron & Steel Research Institute Nanomaterials Engineering and Research Center Beijing 100081 China Research and Development Center Advanced Technology & Materials Co. Ltd. Beijing 100081 China Beijing Institute of Technology School of Science Beijing 100081 China Central Iron & Steel Research Institute Nanomaterials Engineering and Research Center Beijing 100081 China Research and Development Center Advanced Technology & Materials Co. Ltd. Beijing 100081 China Central Iron & Steel Research Institute Nanomaterials Engineering and Research Center Beijing 100081 China Research and Development Center Advanced Technology & Materials Co. Ltd. Beijing 100081 China

During the past several years, giant magneto-impedance effect (GMI) in amorphous wires has generated growing interest in the science community because of their applications in sensors. The giant magneto-impedance effect in Co71.8fe4.9Nb0.8Si7.5B15 amorphous glass-covered wires (AGCW) consists of strong changes in the high frequency impedance with a small DC magnetic field. When f=1 MHz, there is no GMI effect due to the fact that the magnetic penetration depth is higher than their radius. As the frequency increases, the GMI effect becomes important in both the glass-covered wire and the wire after glass removal. field dependence of the impedance has a similar behaviour to the AGCW ones, when a tensile stress is applied to the wire without glass cover.

关键词： giant magneto-impedance amorphous wires frequency

Production and Mechanical Behaviour of Biomedical CoCrMo Alloy

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Chinese Physics Letters 2011年第12期28卷 215-218页

作者： O.Sahin A.Rıza Tuncdemir H.Ali Cetinkara H.Salih Guder E.Sahin Department of Physics Art and Science FacultyMicro/Nanomechanic Characterization LaboratoryMustafa Kemal UniversityHatayTurkey Department of Prosthetic Dentistry Dentistry FacultyMustafa Kemal UniversityHatayTurkey

Cobalt-based alloy(Co-30Cr-5.5Mo)is produced by the investment casting *** alloy complies with the ASTM f75 standard and is widely used in the manufacturing of orthopedic implants because of its high strength,good corrosion resistance and excellent biocompatibility ***,XRD and microhardness tests are used to examine the mechanical properties of the *** examined material exhibits the behaviour of indentation size effect(ISE).Our results reveal that Vickers and Knoop microhardness are dependent on indentation test *** traditional Meyer's law,the proportional specimen resistance(PSR)model and the Hays-Kendall model(HK)are used to analyze the load dependence of the *** a result,the Hays-Kendall model is found to be the most effective to determine the load-independent hardness HLI of CoCrMo alloy.

关键词： alloy resistance process