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Impact of LUCC on Ecosystem Service Value in the Up and Middle Reaches of Dongting Lake Basin,China

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湿地科学 2009年第4期7卷 327-334页

作者： xiong Ying WANG Kelin LIU chun Department of Resources and Environmental Sciences Changsha University of Science and Technology Changsha 410114 Hunan P. R. China Institute of Subtropical Agriculture Chinese Academy of Sciences Changsha 410125 Hunan P. R. China

Supported by geographical information system,using Costanza method and referring to terrestrial ecosystem service value in China,the influence of land use and land cover change(LUCC)between 1980 and 2000 on ecosystem service value in the up and middle reaches of Dongting Lake basin was analyzed in this *** results showed that the estimated value of ecosystem services decreased 8.416 9×108 CNY over a 21-year period,and the main reasons were that the land for forest use was exploited for cropland and construction land use in study *** analysis results showed that the value of single ecosystem service function such as gas regulation,climate regulation,soil formation and conservation,biodiversity conservation,raw materials as well as recreation decreased significantly;and that of provision of water conservation,waste treatment and food production increased obviously in the *** results of coefficient sensitivity analysis indicated that these estimates were reliable.

关键词：生态学 LUCC 湿地地貌学

Preclinical evaluation on ^(125)I-BMIPP

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Nuclear Science and Techniques 2003年第4期14卷 257-260页

作者： LU chun-xiong, WU chun-Ying, ji Shu-Ren, DING Shi-Yu, CHENG Zheng-Ping (State Key Laboratory of Nuclear Medicine, jiangsu Institute of Nuclear Medicine, Wuxi 214063) jiangsu Institute of Nuclear Medicine State Key Laboratory of Nuclear Medicine Wuxi 214063

The biodistribution of 125I-BMIPP and the variation of myocardial uptake of 125I-BMIPP using themetabolic intervention drug were reported. Myocardial uptake of the 125I-BMIPP in rats showed a peak of 5.70ID%/gat 2 min. The ratios of myocardium to blood, to liver and to lung at 30 min were 3.40, 2.64 and 2.88 respectively. Theinitial elimination half time of 4.0 min in rabbits was in accordance with the half elimination time of free fatty acidfrom blood. Myocardial uptake of 125I-BMIPP in the group of glucose-insulin was significantly increased (p＜0.05)than those of the normal control. In vivo and in vitro binding test for 125I-BMIPP to HSA showed a rather constantlevel of activation up to 2 h. Partition coefficients (lgP) were 1.93 and 1.68, respectively.

关键词：碘脂肪酸葡萄糖心肌新陈代谢作用

Proteomic profiling of the hemolymph at the fifth instar of the silkworm Bombyx mori

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Insect Science 2012年第4期19卷 441-454页

作者： jian-Ying Li ji-Sheng Li Bo-xiong Zhong College of Animal Sciences Zhejiang UniversityHangzhouChina

Two-dimensional gel electrophoresis （2-DE） followed by matrix-assisted laser desorption ionization- time-of-flight/time-of-flight mass spectrometry （MS） analysis were used to charaterize the hemolymph proteomic profiles of the silkworm, Bombyx mori. At days 4 （V4） and 5 （VS） of the fifth （final） instar, when the larvae were at the fast-growing stage, we found dramatic changes in spots representing proteins having an approximate molecular weight （MW） of 30 kDa. Of these spots, four 30K proteins were highly up- regulated, implying a close association with the growth and development ofB. mori larvae. To understand the molecular basis and underlying mechanisms involved in development and metamorphosis, the proteome of whole hemolymph at V5 was analyzed using shotgun liquid chromatography tandem mass spectrometry with an LTQ-Orbitrap. A total of 108 proteins were identified without any false discovery hits. These proteins were involved in a variety of cellular functions, including metabolism, development, nutrient transport and reserve, and defense response. Gene ontology analysis showed that 3.4% of these proteins had nutrient reservoir activities and 5.7% were involved in the response to stimulus. Pathway analysis revealed that 22 proteins with common targets were involved in various cellular processes such as immunity, differentiation, proliferation and metamorphosis. These results suggested that some key factors such as the 30K proteins in hemolymph play important roles in B. mori growth and development. Moreover, the multiple functions of hemolymph may be operated by a complex biological network.

关键词： Bombyx mori gene ontology hemolymph LTQ-Orbitrap pathway,proteomics

Analysis of LMW-GS,α-and γ-Gliadin Gene Coding Sequences from Triticum macha

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Agricultural Sciences in China 2010年第2期9卷 163-169页

作者： xiong Li-juan WANG ji-rui ZHENG You-liang Triticeae Research Institute Sichuan Agricultural University Ya＇an 625014 P.R.China Key Laboratory of Southwestern Crop Germplasm Utilization Ministry of Agriculture Ya＇an 625014 P.R.China

Novel LMW-GS （low molecular weight glutenin subunit）,α- and γ-gliadin from Triticum macha accessions were characterized via genomic PCR, which can do favor to improve the wheat quality. The complete coding regions of two α-gliadin, two γ-gliadin and two LMW-GS gene sequences, which designed as Gli-Mal, Gli-Ma2, Gli-Mrl, Gli-Mr2, Glu-LM1 and Glu-LM2, encoded the mature proteins with 307, 241, 348, 302, 474 and 377 amino acid residues, respectively. Gli-Mal and Gli-Ma2 were recognized as pseudogenes due to the in-frame stop codons. The amino acid sequences deduced from these gene sequences were characterized with the typical structure of α- or γ-gliadin or LMW- m type proteins with the exception of Gli-Ma2. Phylogenetic analysis showed Gli-Mal was closely related to those from T. aestivum, whereas Gli-Ma2 seemed to be more homologous with the gene sequences from Dasypyrum breviaristatum. Gli-Mrl was closely related to those from T. turgidum ssp. dicoccoides, while Gli-Mr2 was the nearest to those from T. aestivum. Glu-LM1 was closely related to those from Aegilops tauschii, whereas GIu-LM2 seemed to be more homologous with those from T. durum.

关键词： T. macha α-gliadin γ-gliadin LMW-GS gene clone sequence analysis

Effects of nano-Al_2O_3 and nano-ZrO_2 on the microstructure, behavior and abrasive wear resistance of WC-8Co cemented carbide

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Rare Metals 2011年第5期30卷 533-538页

作者： YANG Tian＇en xiong ji SUN Lan GUO Zhixing QIN Kangcai School of Manufacturing Science and Engineering Sichuan University Chengdu 610065 China

WC-8wt.% Co cemented carbides with varied nano-Al 2 O 3 and nano-ZrO 2 contents were prepared respectively following conventional powder metallurgical procedures. Effects of nano-Al 2 O 3 and nano-ZrO 2 on the microstructure, behavior, and abrasive wear resistance were investigated. The result shows that a finer and more homogenous microstructure can be achieved by increasing nano-Al 2 O 3 , and increasing nano-ZrO 2 makes the microstructure more refined. Nano-Al 2 O 3 and nano-ZrO 2 could both help to give increased hardness. Transverse rupture strength is higher if the above nano-oxides are doped appropriately, whereas excess addition is deleterious. Abrasive wear resistance presents different variations with respect to increasing nano-Al 2 O 3 and nano-ZrO 2 . By contrast, increasing nano-ZrO 2 enhances the abrasive wear resistance more effectively than increasing nano-Al 2 O 3 . The influence of the two nano-oxides contents on the abrasive wear resistance does not almost vary with wear time, and the optimum addition level of nano-Al 2 O 3 in WC-8% Co cemented carbide is 0.3 wt.% from the stand of abrasive wear resistance. In addition, both of the nano-oxides can retard the increase of wear rate in long-term abrasive wear.

关键词： cemented carbides microstructure abrasion wear resistance oxides mechanical properties

Design and simulation of a tuning fork micromachined gyroscope with slide film damping

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光学精密工程 2005年第5期13卷 519-524页

作者： CHE Lu-feng xiong Bin jiAO ji-wei WANG Yue-lin State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China

A novel tuning fork micromachined gyroscope, based on slide-film damping, is presented. The electrostatic driving gyroscope consists of two driving masses each of which supports one sensitive mass. The angular rate is sensed by the differential capacitances consisted of movable bar electrodes and fixed bar electrodes located on the glass wafer. The gyroscope can operate at atmospheric pressure with slide film damping in the driving and sensing directions, eliminate vacuum packaging and restrain cross-axis acceleration signal. The results of design and simulation show that the driving and sensing mode frequencies are 3 106 Hz and 3 175 Hz,respectively, and the Q-values in driving and sensitive modes are 1 721 and 1 450 respectively. The design resolution is 0.025°/s.

关键词：等效电路模拟角度传感器微电子力学系统电路等效方程

Thermodynamics aided design of hBN-capsulated diboride powders from novel nitrate precursors for high entropy ceramics

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Journal of Materials Science & Technology 2024年第11期178卷 133-142页

作者： Hailing Yang ji Zou Zhimin xiong jingjing Liu Weimin Wang Zhengyi Fu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China Hubei Longzhong Laboratory Xiangyang 441000China

Hexagonal BN-coated powders have been widely used in various engineering sectors,however,their pro-ductions are restricted by the complexity of gas-solid *** this study,guided by thermodynamics,a novel approach to synthesize Layer-structured hexagonal BN(hBN)-coated high entropy diboride pow-ders in vacuum was developed,using metal salt Zr(NO_(3))4·5H_(2)O,HfCl_(4),NbC_(15),TaC_(15),C_(16)H_(36)O_(4)Ti,boric acid,and sucrose as raw *** adjusting the ratio of carbon to metal source(C/M),powders only consisting of two boride solid solutions and hBN were finally obtained,under an optimal process-ing condition of C/M=5.5 and synthesis temperature of 1400 ℃.Parts of hBN were found to coat on high-entropy metal diborides ceramic(HEB)particles,corresponding formation mechanism for core-shell structured powders was investigated,together with the liquid precursor assisted boro/carbothermal re-duction *** from as-synthesized core-shell powders,(Ti_(0.2)Zr_(0.2)Hf_(0.2)Nb_(0.2)Ta_(0.2))B2-11 vol%hBN ceramics were densified at 1900 ℃ under 50 MPa without holding,with a high relative density of 97.3%.

关键词： High entropy boride Boro/carbothermal reduction Sol-gel Core-shell powders Densification

Model Predictive Direct Power Control of Grid-connected Converters Considering Unbalanced Filter Inductance and Grid Conditions

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Journal of Modern Power Systems and Clean Energy 2021年第6期9卷 1279-1288页

作者： Weichen Yang Shihong Miao Zhiwei Liu ji Han Yulong xiong Qingyu Tu State Key Laboratory of Advanced Electromagnetic Engineering and Technology Hubei Electric Power Security and High Efficiency Key LaboratorySchool of Electrical and Electronic EngineeringHuazhong University of Science and Technology

The grid-connected converter(GCC) is widely used as the interface between various distributed generations and the utility grid. To achieve precise power control for GCC, this paper presents a model predictive direct power control(MPDPC)with consideration of the unbalanced filter inductance and grid conditions. First, the characteristics of GCC with unbalanced filter inductance are analyzed and a modified voltage control function is derived. On this basis, to compensate for the power oscillation caused by unbalanced filter inductance, a novel power compensation method is proposed for MPDPC to eliminate the DC-side current ripple while maintaining sinusoidal grid current. Besides, to improve the control robustness against mismatched filter inductance, a filter inductance identification scheme is proposed. Through this scheme, the estimated value of filter inductance is updated in each control period and applied in the proposed MPDPC. Finally, simulation results in PSCAD/EMTDC confirm the validity of the proposed MPDPC and the filter inductance identification scheme.

关键词： Inductance identification grid-connected converter model predictive control power oscillation elimination unbalanced grid conditions

Effect of cermet substrate characteristics on the microstructure and properties of TiAlN coatings

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International Journal of Minerals,Metallurgy and Materials 2022年第3期29卷 547-556页

作者： Qianbing You ji xiong Tianen Yang Tao Hua Yunliang Huo Junbo Liu School of Mechanical Engineering Sichuan UniversityChengdu 610065China

The composition and structure of substrate materials have important influences on coating performance,especially in terms of bond-ing strength and coating hardness,which determine whether the coating can be used for a given *** this study,a TiAlN coating is deposited on Ti(C,N)-based cermet(TC)substrates with 0wt%-20wt%WC by arc ion *** influence of cermet substrate characterist-ics on the structure and properties of the TiAlN coating is then *** show that the TiAlN coating deposited on the TC substrate has a columnar grain *** WC increases,the strength ratio of I(111)/I(200)and adhesive strength of TiAlN gradually *** the ab-sence of WC in the substrate,the preferred orientation of the TiAlN coating is(200).As WC increases,the preferred orientation of the TiAlN coating becomes(111)and(200).Notable differences in adhesive strength between the coating and substrate could be attributed to the micro-structure and composition of the *** results show that the adhesive strengths of the TiAlN coating on the 0wt%-20wt%WC cer-met substrate are 52-65 *** the coatings obtained that on the TC substrate with 15wt%WC presents the highest H/E and H3/E2,which indicates that this coating also features the best wear *** failure mechanisms of the coated tools include coating peeling,adhesive wear,and abrasive *** the cutting speed increases,the degree of flank wear increases and the durability of the coating decreases *** in WC result in an initial decrease followed by a gradual increase in the flank wear of the coated cermet inserts.

关键词： cermet TiAlN coating characteristics structure properties