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Microstructure and corrosion resistance of vanadium films deposited at different target-substrate distance by HPPMS

Rare Metals 2014年第5期33卷 587-593页

作者： Chun-Wei Li xiu-Bo Tian Tian-Wei Liu Jian-Wei Qin Chun-zhi Gong State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology College of Engineering and Technology Northeast Forestry University State Key Laboratory of Surface Physics and Chemistry China Academy of Engineering Physics

High power pulsed magnetron sputtering（HPPMS）, a novel physical vapor deposition technology, was applied to prepare vanadium films on aluminum alloy substrate in this paper. The influence of target–substrate distance（Dt–s）（ranging from 8 to 20 cm） on phase structure, surface morphology, deposition rate, and corrosion resistance of vanadium films was investigated. The results show that the vanadium films are textured with a preferential orientation in the（111） direction except for that fabricated at 20 cm. With Dt–sincreasing, the intensity of（111） diffraction peak of the films decreases and there exists a proper distance leading to the minimum surface roughness of 0.65 nm. The deposition rate decreases with Dt–sincreasing. All the V-coated aluminum samples possess better corrosion resistance than the control sample. The sample fabricated at Dt–sof 12 cm demonstrates the best corrosion resistance with the corrosion potential increasing by 0.19 V and the corrosion current decreasing by an order of magnitude compared with that of the substrate. The samples gain further improvement in corrosion resistance after annealing, and if compared with that of annealed aluminum alloy, then the corrosion potential of the sample fabricated at 20 cm increases by 0.415 V and the corrosion current decreases by two orders of magnitude after annealed at 200 °C. If the annealing temperature further rises to 300 °C, then the corrosion resistance of samples increases less obviously than that of the control sample.

关键词： High power pulsed magnetron sputtering Vanadium films Target–substrate distance Microstructure Corrosion resistance

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Propagation of flexural waves in phononic crystal thin plates with linear defects

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第10期11卷 827-834页

作者： Zong-jian YAO gui-lan YU Yue-sheng WANG zhi-fei SHI Jian-bao LI School of Civil Engineering Beijing Jiaotong University Beijing 100044 China

The band structures of flexural waves in a phononic crystal thin plate with straight, bending or branching linear defects are theoretically investigated using the supercell technique based on the improved plane wave expansion method. We show the existence of an absolute band gap of the perfect phononic crystal and linear defect modes inside the gap caused by localization of flexural waves at or near the defects. The displacement distributions show that flexural waves can transmit well along the straight linear defect created by removing one row of cylinders from the perfect phononic crystals for almost all the frequencies falling in the band gap, which indicates that this structure can act as a high efficiency waveguide. However, for bending or branching linear defects, there exist both guided and localized modes, and therefore the phononic crystals could be served as waveguides or filters.

关键词： Phononic crystal Thin plates Linear defects Flexural waves

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Research on modeling of nonlinear vibration isolation system based on Bouce Wen model

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Defence Technology（防务技术） 2014年第4期10卷 371-374页

作者： zhi-ling PENG Chun-gui ZHOU College of Mechatronic Engineering North University of China

A feedforword neural network of multi-layer topologies for systems with hysteretic nonlinearity is constructed based on Bouce Wen differential model. It not only reflects the hysteresis force characteristics of the Bouce Wen model, but also determines its corresponding parameters. The simulation results show that restoring forceedisplacement curve hysteresis loop is very close to the real curve. The model trained can accurately predict the time response of system. The model is checked under the noise level. The result shows that the model has higher modeling precision, good generalization capability and a certain anti-interference ability.

关键词： Bouc-Wen模型建模精度非线性隔振系统迟滞非线性系统基础前馈神经网络位移曲线抗干扰能力

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The potential of domestic production and imports of oil and gas in China:an energy return on investment perspective

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Petroleum Science 2016年第4期13卷 788-804页

作者： Zhao-Yang Kong xiu-Cheng Dong Qian Shao Xin Wan Da-Lin Tang gui-Xian Liu School of Business Administration China University of Petroleum(Beijing)Beijing 102249China School of Business Tianjin University of Finance and EconomicsTianjin 300222China Tangshan Iron and Steel Group Co. LtdTangshan 261000China China Petroleum Enterprise Association Beijing 100724China

Concerns about China’s energy security have escalated because of the country’s high dependency on oil and gas imports, so it is necessary to calculate the availability of domestic oil and gas resources and China’s ability to obtain foreign energy through trade. In this work,the calculation was done by using the energy return on investment（EROI） method. The results showed that the EROIstnd（i.e., standard EROI） of China’s oil and gas extraction decreased from approximately 17.3：1 in 1986 to 8.4：1 in 2003, but it increased to 12.2：1 in 2013. From a company-level perspective, the EROIstnddiffered for different companies and was in the range of（8–12）：1. The EROI2,d（EROI considering energy outputs after processed and direct energy inputs） for different companies was in the range of（3–7）：1. The EROI of imported oil（EROIIO）declined from 14.8：1 in 1998 to approximately 4.8：1 in 2014, and the EROI of imported natural gas（EROIING）declined from 16.7：1 in 2009 to 8.6：1 in 2014. In 2015, the EROIIO and EROIING showed a slight increase due to decreasing import prices. In general, this paper suggests that from a net energy perspective, it has become more difficult for China to obtain oil and gas from both domestic production and imports. China is experiencing an EROI decline, which demonstrates the risk in the use of unsustainable fossil resources.

关键词： EROI Oil and gas extraction Imported oil Imported natural gas China

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Microwave promoted one-pot synthesis of 3-(2′-amino-3′-cyano-4′-arylpyrid-6′-yl)coumarins

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Chinese Chemical Letters 2009年第1期20卷 37-39页

作者： Jian Feng Zhou gui Xia Gong Feng Xia Zhu San Jun zhi Department of Chemistry Huaiyin Teachers College Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials Huaian 223300 China School of Chemistry and Chemical Engineering Key Laboratory of Organic Synthesis of Jiangsu Province Suzhou University Suzhou 215123 China

A facile procedure for the synthesis of 3-（2′-amino-3′-cyano-4′-arylpyrid-6′-yl） coumarins are being reported starting from 3- acetylcoumarin, aromatic aldehydes and malononitrile. The reactions were carried out on microwave irradiation in good yield with short time and easy work-up. The structures of all the compounds have been confirmed on the basis of their analytical, IR, ^1H NMR, and mass spectral data.

关键词： 3-(2′-Amino-3′-cyano-4′arylpyrid-6′-yl) coumarin Aromatic aldehyde 3-Acetylcoumarin Microwave irradiation

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Wilson disease associated with immune thrombocytopenia: A case report and review of the literature

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World Journal of Clinical Cases 2019年第17期7卷 2630-2636页

作者： Tian-Jiao Ma gui-Lian Sun Fang Yao zhi-Liang Yang Department of Pediatrics The First Hospital of China Medical University

BACKGROUND Wilson disease (WD) is a genetic disorder of hepatic copper excretion,leading to copper accumulation in various *** manifestations are quite variable,and hemolytic anemia is the most common hematological *** associated with thrombocytopenia is very *** SUMMARY We report the case of an 11-year-old Chinese girl with WD that was associated with immune thrombocytopenia (ITP).Thrombocytopenia was the initial chief complaint for her to visit a hematologist,and ITP was diagnosed based on the results of a bone marrow biopsy and positive antiplatelet *** two weeks before the thrombocytopenia was found,the patient developed *** developed in her right hand about one week after being diagnosed with ITP,after which she was admitted to our *** evaluations were *** was decreased,with an increased level of copper in her 24-h urine *** Fleischer's ring (K-F ring) was *** ultrasound showed liver cirrhosis,and brain magnetic resonance imaging showed that the lenticular nucleus,caudate nucleus,and brainstem presented a low signal intensity in T1-weighted images and high signal intensity in T2-weighted *** was diagnosed and a genetic analysis was performed.A compound heterozygous mutation in ATP7B was detected;c.2333G>T (***778Leu) in exon 8 and c.3809A>G (***1270Ser) in exon *** former was inherited from her father and the latter from her ***,her parents showed normal liver function and negative K-F *** a compound mutation in a case of WD associated with ITP in children has not been published *** WD can associate with thrombocytopenia but the mechanism is still *** recommend that antiplatelet autoantibodies should be tested in WD patients with thrombocytopenia in future to verify the association.

关键词： Wilson disease Immune thrombocytopenia ATP7B Case report

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Loss of stat3 function leads to spine malformation and immune disorder in zebrafish

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Science Bulletin 2017年第3期62卷 185-196页

作者： Shuting Xiong Junjie Wu Jing Jing Peipei Huang zhi Li Jie Mei Jian-Fang gui College of Fisheries Key Laboratory of Freshwater Animal BreedingMinistry of AgricultureFreshwater Aquaculture Collaborative Innovation Center of Hubei ProvinceHuazhong Agricultural University State Key Laboratory of Freshwater Ecology and Biotechnology Institute of HydrobiologyChinese Academy of SciencesUniversity of Chinese Academy of Sciences

STAT （Signal Transducers and Activators of Transcription） gene family members have been revealed to be involved in cell growth and differentiation in vertebrates. Despite their physiological importance, their functions are poorly studied at organ and systemic levels. In this study, we performed a genome-wide analysis using data from invertebrates to vertebrates to identify STAT genes and analyze their evolutionary history. Interestingly, the STAT gene family undergoes genome duplications during the evolutionary history with STAT3 homologues firstly appearing in the basal extant vertebrate, sea lamprey, suggesting its possible roles in spine formation. To investigate the functions of stat3 in fish species, TALEN technology was performed to generate mutant zebrafish lines, star3 mutant zebrafish showed no obvious defects at early developmental stage but displayed severe lateral and vertical curvature of the spine （scoliosis）, spine fracture and the incomplete bone joints with narrower junction between vertebrae at early juvenile stage, as indicated by Alizarin red and Alcian blue staining, radiography and micro-computed tomography （MicroCT） analysis. Transcriptome analysis reveals dramatic alterations in a number of genes involved in immune and infection response, skeletal development and somatic growth, especially downregulated expression of collagen gene family, in the juvenile stat3 mutant zebrafish. Moreover, most of the collagen genes were detected to have abnormal expression pattern during the formation of spine deformities in stat3 mutants. Our data reveal that stat3 is specially expressed in vertebrates and required for normal spine development and immune function in zebrafish.

关键词： Star3 Zebrafish Spine malformation Immune disorder

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Novel Pilot-aided Ridge Regression Channel Estimation for SC-FDE System on Time-varying Frequency Selective Fading Channel

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Journal of Harbin Institute of Technology(New Series) 2013年第1期20卷 23-27页

作者： xiu-Hua Li Lin Ma Xue-zhi Tan Xin Liu Communication Research Center Harbin Institute of Technology Science and Technology on Information Transmission and Dissemination in Communication Networks Laboratory

A novel pilot-aided ridge regression (RR) channel estimation for SC-FDE system on time-varying frequency selective fading channel is derived. Previous least square (LS) channel estimation, which does not consider and utilize the influence of noise, has poor performance when the observed signal is corrupted abnormally by noise. In order to overcome the inherent disadvantage of LS estimation, the proposed RR estimation uses the influence of noise to get better performance. The performance of this new estimator is examined. The numerical results are presented to show that the new estimation improves the accuracy of estimation especially in low channel signal-to-noise ratio (CSNR) level and outperforms LS estimation. In addition, the proposed RR estimation can get the gains of about 1dB compared with LS estimation.

关键词： SC-FDE channel estimation least square ridge regression

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Matrix Tensor Product Approach to the Equivalence of Multipartite States under Local Unitary Transformations

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Communications in Theoretical Physics 2006年第2期45卷 267-270页

作者： GAO xiu-Hong S. Alberverio FEI Shao-Ming WANG zhi-Xi Department of Mathematics Capital Normal University Beijing 100037 China Institut fur Angewandte Mathematik Universitat Bonn D-53115 Bonn Germany

The equivalence of multipartite quantum mixed states under local unitary transformations is studied. A criterion for the equivalence of non-degenerate mixed multipartite quantum states under local unitary transformati... 详细信息

关键词： local unitary transformation multipartite quantum mixed state tensor decomposable

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1D and 2DΞ_(b)andΛ_(b)baryons

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Chinese Physics C 2022年第9期46卷 20-35页

作者： Guo-Liang Yu zhi-Gang Wang xiu-Wu Wang Department of Mathematics and Physics North China Electric power universityBaoding 071003China

Recently,scientists have achieved significant progress in experiments searching for excitedΞ_(b)andΛ_(b)baryons such asΛ_(b)(6072),Λ_(b)(6146),Λ_(b)(6152),Ξ_(b)(6227),Ξ_(b)(6100),Ξ_(b)(6327),andΞ_(b)(6333).Motivated by these achievements,we systematically analyze the 1D and 2D states ofΞ_(b)andΛ_(b)baryons using the method of quantum chromodynamics sum *** constructing three types of interpolating currents,we calculate the masses and pole residues of these heavy baryons with different excitation modes:(L_(ρ),L_(λ))=(0,2),(2,0),and(1,1).Subsequently,we decode the inner structures ofΛ_(b)(6146),Λ_(b)(6152),Ξ_(b)(6327),andΞ_(b)(6333)and favor assigning these states as the 1D baryons with the quantum numbers(L_(ρ),L_(λ))=(0,2)and 3/2^(+),5/2^(+),3/2^(+),and 5/2^(+),*** addition,the predictions for the masses and pole residues of the other 1D and 2DΞ_(b)andΛ_(b)baryons in this paper will be useful for studying D-wave bottom baryons in the future.

关键词： sum rules baryons excited states

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