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Journal of Wuhan University of Technology(Materials Science) 2020年第6期35卷 1073-1080页

作者： wan lu China Shanghai Architectural Design&Reserach Institute Co.Ltd. Shanghai 20062China

This work aimed to use oyster shell powder (OSP) as the partial replacement of Ag/TiO2 particle to obtain multifunctional β-hemihydrate ***,the β-hemihydrate gypsum was mixed with different contents of OSP and Ag/TiO2 *** and MB removal experiments were conducted to assess the antibacterial characteristic and photocatalytic activity of β-hemihydrate gypsum with Ag/TiO2 particle and ***,the formaldehyde degradation test was carried out to evaluate its formaldehyde removal ***,their setting times,compressive and flexural strengths at 1,3,and 28 days were comparatively *** experimental results prove that the composite use of OSP and Ag/TiO2 particle provide feasible multifunction for the β-hemihydrate *** can further improve the bactericidal rates and exhibit extra MB removal ratios compared with the gypsum plasters with single Ag/TiO2 ***,they can increase the formaldehyde degradation ratios,and this promotion is related to the introduction of Ag/TiO2 ***,OSP delays the initial setting time but promotes the final setting time of β-hemihydrate gypsum,and Ag/TiO2 particle hardly affects the setting ***,OSP reduces the strengths of plasters at 1,3,and 28 *** in general,the composite addition of OSP and Ag/TiO2 particle increase the compressive and flexural strengths of gypsum plasters at 1,3,and 28 *** results provide theoretical guidance for the recycling of OSP and the preparation of gypsum-based products with antibacterial and formaldehyde degradation capabilities.

关键词： oyster shell powder Ag/TiO2 particle β-hemihydrate gypsum bactericidal rate setting times

Growth of Casting Microcrack and Micropore in Single-crystal Superalloys Analysed by Three-Dimensional Unit Cell

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Journal of Materials Science & Technology 2006年第2期22卷 183-189页

作者： Jiansong wan Zhenzhou lu Zhufeng YUE Department of Engineering Mechanics Northwestern Polytechnical University Xi＇an 710072 China

Finite element （FE） analysis was employed to investigate the casting microcrack and micropore growth in nickel-base single-crystal superalloys DD3. Based on the finite deformation rate-dependent crystallographic constitutive equation, the simulations of casting microcrack and micropore growth in three-dimensional unit cell model were carried out in a range of parameters including stress triaxiality, Lode parameter and type of activated slip systems. The FE results show that the stress triaxiality has profound effects on growth behavior, and the Lode parameter is also important for the casting microcrack and micropore growth. The type of operative slip systems has remarkable effect on casting microcrack and micropore growth, so the life of single- crystal component is associated with the type of activated slip systems, which is related to Schmid factor and the number of activated slip systems. The growth comparison between microcrack and micropore reveals that when the material is subjected to large deformation, the growth rate of microcrack is faster than that of micropore, i.e. microcrack is more dangerous than micropore; the microcrack is easier to result in brittle fracture than micropore. The stress triaxiality and Lode parameter have strong influence on the growth of microcrack and micropore.

关键词： Casting micropore Casting crack Single-crystal superalloys Crystallographic constitutive equation

Exploring the impacts of major events on the systemic risk of the international energy market

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Petroleum Science 2024年第2期21卷 1444-1457页

作者： Ming-Tao Zhao Su-wan lu Lian-Biao Cui School of Statistics and Applied Mathematics Anhui University of Finance and EconomicsBengbu233030AnhuiChina Anhui Province Key Laboratory of Philosophy and Social Science of Low-Carbon Development and Carbon Finance Anhui University of Finance and EconomicsBengbu233030AnhuiChina

This study examines the systemic risk caused by major events in the international energy market(IEM)and proposes a management strategy to mitigate it. Using the tail-event driven network(TENET)method, this study constructed a tail-risk spillover network(TRSN) of IEM and simulated the dynamic spillover tail-risk process through the cascading failure mechanism. The study found that renewable energy markets contributed more to systemic risk during the Paris Agreement and the COVID-19pandemic, while fossil energy markets played a larger role during the Russia-Ukraine conflict. This study identifies systemically important markets(SM) and critical tail-risk spillover paths as potential sources of systemic risk. The research confirms that cutting off the IEM risk spillover path can greatly reduce systemic risk and the influence of SM. This study offers insights into the management of systemic risk in IEM and provides policy recommendations to reduce the impact of shock events.

关键词： International energy market Tail-risk spillover Cascading failure mechanism Systemic risk management

Electrokinetic movement of multiple chlorobenzenes in contaminated soils in the presence of β-cyclodextrin

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Journal of Environmental Sciences 2007年第8期19卷 968-976页

作者： YUAN Song-hu wan Jin-zhong lu Xiao-hua School of Environmental Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China.

This study investigated the electrokinetic （EK） behavior of multiple chlorobenzenes, including 1,2,3,4-tetrachlorobenzene （TeCB）, 1,2,4,5-tetrachlorobenzene （i-TeCB）, and 1,2,3-trichlorobenzene （TCB） in contaminated clayed soils. The effect of β-cyclodextrin （β- CD） on the EK removal of the chlorobenzenes was studied. The largest removal was obtained when Na2CO3/NaHCO3 buffer was used as anodic purging solution without β-CD. The removal efficiencies were related to the aqueous solubilities of chlorobenzenes. With the same cumulative electroosmotic flow, greater solubility led to higher removal efficiency. The addition of β-CD inhibited the EK removal efficiency of all chlorobenzenes. The inhibition increased with the increase of β-CD concentration. With the same β-CD concentration, the inhibition increased with the rise of electric potential. It was found that the inclusion compounds between β-CD and chlorobenzenzes were less soluble than chlorobenzenes. The formation of the less soluble inclusion compounds reduced the aqueous solubility of chlorobenzenes and led to the partial immobilization of the chlorobenzenes that desorbed from soil. It was feasible to use the EK technology to remove chlorobenzenes in contaminated soils using water as the anodic flushing solution. The addition of β-CD was not recommended for the EK removal of chlorobenzenes.

关键词： chlorobenzenes electrokinetic soil remediation β-cyclodextrin (β-CD)

Orthogonal Wavelet Packet Analysis Based Chaos Recognition Method

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Frontiers of Electrical and Electronic Engineering in China 2006年第1期1卷 13-19页

作者： JIANG wan-lu Yanshan University Qinhuangdao 066004China

The chaotic motion characteristics are expounded by taking the Duffing equation system as an *** frequency band segmentation ability and the frequency resolution of the orthogonal multiresolution analysis and the orthogonal wavelet packet analysis are compared.A new orthogonal wavelet packet analysis-based chaos recognition method for chaotic motion characteristics is put *** chaotic,random,and periodic motions are identified effectively by use of the subfrequency band energy distribution in the signal *** characteristic frequency of chaotic motion is thus extracted.

关键词： chaos recognition wavelet packet analysis frequency band segmentation

The formation and evolution of Chepaizi-Mosuowan paleo-uplift and its control on the distributions of sedimentary facies in the Junggar Basin

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Science China Earth Sciences 2010年第6期53卷 818-831页

作者： JI YouLiang ZHOU Yong KUANG Jun wan lu ZHANG Rui lu ChunHong State Key Laboratory of Petroleum Resource and Prospecting China University of PetroleumBeijing 102249China Xinjiang Oil Field Urumqi 834000China

The Chepaizi-Mosuowan paleo-uplift is a large-scale uplift stretching across the Junggar Basin formed during the Yanshanian. It has experienced four evolutionary stages: the initial forming stage (J1), the intense development stage (J2+3), the waning and burial stage (K-E), and the tilting and extinction stage (N-Q). The most intense period of activities is the Middle Jurassic. Dur-ing the Early Jurassic, the Chepaizi-Mosuowan paleo-structure was a low amplitude uplift. Because of the subsequent strong uplifting during Middle-Late Jurassic, the Middle and Upper Jurassic were eroded. With the evolution of the Chepaizi-Mosuowan paleo-uplift, the sedimentary pattern of the basin changed, and the paleo-uplift separated the northern depositional systems from those in the south side. As a result, the basin tectonics controlled the distribution and evolution of the depositional systems. During Early Jurassic, while the paleo-uplift was low, its controlling effect on depositional systems was limited and sediments coming from the northwest could reach the central and southern parts of the basin. With the strong uplifting of the Chepaizi-Mosuowan paleo-structure during Middle-Late Jurassic, sediments from the northwest provenance could only deposit in the northern graben of the paleo-uplift. The intense erosion of the Middle-Upper Jurassic also changed the former sedimentary center of the basin into a source area, supplying sediments for grabens on both sides of the paleo-uplift. In the Cretaceous, regional subsidence caused the paleo-uplift to be buried again and subsequently sediments accumulated on top of it. The depositional facies are dominated by fluvial in the Early Cretaceous and shallow lacustrine to deltaic in the Late Cretaceous. In the history of the long-lasting development of this paleo-uplift, large-scale erosions of the paleohigh not only provided sufficient sediments to the center of the Junggar Basin, but also created favorable conditions for the formation o

关键词： Chepaizi-Mosuowan paleo-uplift formation and evolution depositional systems Junggar Basin.

Ceric(Ⅳ)-mediated Oxidative Addition of 1,3-Dicarbonyl Compounds to MCPs:A Facile Access to Dihydrofuran Derivatives Incorporating Cyclopropyl Groups

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Chinese Chemical Letters 2006年第5期17卷 569-570页

作者： wan Li CHEN lu Ling WU Xian HUANG Department of Chemistry Zhejiang University （Xixi Campus） Hangzhou 310028

Alkylidenecyclopropanes undergo ceric（Ⅳ） ammonium nitrate （CAN）-mediated addition reaction with 1,3-dicarbonyl compounds leading to dihydrofuran derivatives incorporating cyclopropyl groups in moderate yields.

关键词： Alkylidenecyclopropane ceric(Ⅳ) ammonium nitrate (CAN) dihydrofuran derivatives.

Photoluminescence Properties of Nanocrystalline 3C-SiC Films

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Chinese Journal of Aeronautics 2006年第B12期19卷 215-219页

作者： YUWei lu Xue-qin lu wan-bing HAN Li FU Guang-sheng College of Physics Science and Technology Hebei University Baoding 071002 China

Nanocrystalline （nc） 3C-SiC films on the Si substrate were prepared by the helicon wave plasma enhanced chemical vapor deposition （HW-PECVD） technique. With the SiH4-CH4 gas flow ratio changing, the films exhibit different photoluminescence （PL） characteristics. Under the stoichiometric condition, the PL peak redshift from 470 nm to 515 nm is detected with the increase of excitation wavelength, which can be attributed to the quantum confinement effect radiation of 3C-SiC nanocrystals of different sizes. However, the appearance of an additional PL band at 436 nm in Si-rich film might be sourced back to the excess of Si defect centers in it. This is also the case for C-rich film for its PL band lying at 570 nm. The results above quoted indicate an important influence of gas flow ratio on the PL properties of the SiC films providing an effective guidance for analyzing the luminescence mechanism and exploring the high-efficiency light emission of the SiC films.

关键词： SiC film photoluminescence quantum confinement effect defect

A multifunctional separator with Mg(OH)2 nanoflake coatings for safe lithium-metal batteries

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Journal of Energy Chemistry 2021年第1期30卷 75-83,I0003页

作者： Dian-Hui Han Meng Zhang Peng-Xian lu Yun-lu wan Qiu-Ling Chen Hong-Yu Niu Zhi-Wei Yu School of Materials Science and Engineering Henan University of TechnologyZhengzhou 450007HenanChina Zhengzhou Key Laboratory for Clean Energy Henan University of TechnologyZhengzhou 450007HenanChina

Dendrite growth and thermal runaway induce serious safety hazards,impeding the practical applications of lithium metal batteries(LMBs).Although extensive advances have been attained in terms of LMB safety,most work only focus on a single aspect at a *** paper reports a multifunctional separator coated by Mg(OH)2 nanoflakes with various excellent properties including electrolyte wettability,ionic conductivity,Li+ transference number,puncture strength,thermal stability and flame *** used in LMBs,the Mg(OH)2 nanoflake coatings enable uniform Li+ distributing,which makes it homogeneous to deposit lithium,realizing effective dendrite suppression and less volume ***,Mg(OH)2 coatings can ensure LMBs are in normal conditions without thermal runaway until 140 ℃.A part of lithium can be converted into Li+ ions by Mg(OH)2 during repeated charge/discharge cycles,not only reducing the risk of separator damage and consequent short circuit,but also replenishing the capacity loss of *** Mg(OH)2 nanoflakes can coat on all kinds of commercial separators to improve their performances,which offers a facile but effective strategy for fabricating multifunctional separators and a comprehensive insight into enhancing LMB safety.

关键词： Dendrite-free Thermal stability Li metal batteries Multifunctional separators Mg(OH)2 nanoflakes

Theoretical studies of insertion reactions of singlet germylene into aryl C-C1 bond of 1-chlorobenzene

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Chinese Chemical Letters 2009年第3期20卷 374-377页

作者： Chuan lu wan Yong Ma Yu Zhen Fang Jian Hua Zhou School of Chemical Engineering Shandong Institute of Light Industry Jinan 250353 China

The insertion reactions of germylene into C-Cl bond of 1-chorobenzene have been explored using density functional theory. Five germylene species have been chosen for systematically studying. All the stationary points were determined at the B3LYP/ 6-311＋G （d, p） level of the theory. The results show that, the smaller the AEsT of germylene, the lower the barrier height, and the electropositive substituents on the germylene can increase the reaction activity and exothermicity of insertion into C-Cl bond of 1- chorobenzene.

关键词： Germylene Insertion reactions Density functional theory 1-Chorobenzene