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137篇 您的检索式:作者名="WU Changchun"
    题名 作者 年代 出处 被引量
1Fracture development in shale and its relationship to gas accumulation显示文摘有高石英,长石和碳酸盐的页岩,将有低泊松比率,高幼仔模量和高易碎物。作为结果,页岩是导致的在外部力量下面生产自然、导致的破裂。一般来说,在在页岩和在场的易碎的矿物质的体积的破裂开发之间有好关联。有高 TOC 或反常地高的压力的页岩开发得好破裂。页岩破裂开发也与全部的煤气的累积和免费煤气的体积显示出积极关联,即,页岩破裂越更好被开发,越 greater 煤气的累积并且因此越多更高煤气的生产。破裂为天然气和形成水提供迁居水管和累积空格,它为免费天然气的容量的增加是有利的。在页岩的更宽的破裂导致煤气的损失。在北美洲,从在页岩的高角度的破裂地区有页岩气体探索和高煤气的生产的高成功比率。在在四川盆的更低的古生代的海洋的器官的充满事的岩石中的好天然气表演或低收益制片人是仔细与在易碎的页岩的破裂开发的度有关。Wenlong Ding Chao Li Chunyan Li Changchun Xu Kai Jiu Weite Zeng Liming Wu 2012Geoscience Frontiers2012,3,1:32
2HMGB 1 contributes to allergen-induced airway remodeling in a murine model of chronic asthma by modulating airway inflammation and activating lung fibroblasts显示文摘支持发炎的因素(HMGB1 ) 高活动性的组盒子蛋白质 1 在气喘的致病被含有。在这研究,我们使用了长期的气喘的一个鼠科的模型在航线改变上评估 HMGB1 的效果。女 BALB/c 老鼠随机被划分成四个组:控制, ovalbumin (卵) 气喘, OVA+适应于不同地区生活的动物抗体和 OVA+ anti-HMGB1 抗体。Anti-HMGB1 抗体治疗在白天 21 上被开始并且与卵在 intranasal 挑战前每星期被管理三次 6 个星期。在这个鼠标模型, HMGB1 表示显著地被提高。anti-HMGB1 抗体组展出了免疫球蛋白 E (IgE ) 和煽动性的调停人的减少的层次并且与卵组相比减少了煽动性的房间累积,航线 hyperresponsiveness (AHR ) ,粘液合成,光滑的肌肉厚度和肺骨胶原内容。有 HMGB1 的治疗增加了增长,移植,骨胶原分泌物和 α在 MRC-5 房间的光滑的肌肉肌动朊(SMA ) 表示。有 HMGB1/IL-1β 的处理;建筑群显著地增加了转变生长因素的表示和分泌物(TGF-β 1 ) ,矩阵 metalloproteinase (MMP )-9 和脉管的 endothelial 生长因素(VEGF ) 。总的来说,这些结果建议那项堵住的 HMGB1 活动可以颠倒航线由压制航线发炎和 modulating 肺成纤维细胞显型和激活改变。Changchun H ou Jinliang Kong Yue Liang Hong Huang Hanchun Wen Xiaowen Zheng Lihong Wu Yiqiang Chen 2015Cellular & Molecular Immunology2015,12,4:19
3Effects of Current Frequency on the Microstructure and Wear Resistance of Ceramic Coatings Embedded with SiC Nano-particles Produced by Micro-arc Oxidation on AZ91D Magnesium Alloy显示文摘To improve the surface wear resistance of the ceramic coating fabricated by micro-arc oxidation (MAO) on AZ91D magnesium alloy,ceramic coatings embedded with SiC nano-particles at different current frequency (500 Hz,700 Hz,and 900 Hz) were produced during the MAO process.The morphology and phase composition of the coatings were investigated by scanning electron microscopy (SEM),field emission scanning electron microscopy (FESEM),and X-ray diffraction (XRD).The surface roughness of the coatings was characterized by confocal laser scanning microscopy (CLSM).Simultaneously,the tribological properties of the composite coatings were evaluated by using a universal materials tester (UMT).The results shows that the wear resistance of the ceramic coatings with SiC nano-particles was improved significantly compared to the ceramic coatings without SiC nano-particles.Furthermore,the composite coating formed at current frequency 900 Hz showed the better wear resistance than the others.Yue Yang and Hua Wu Key Laboratory of Advanced Structural Materials,Ministry of Education,Changchun University of Technology,Changchun 130012,China 2010Journal of Materials Science & Technology2010,26,10:14
4Tectonic setting of the Helong Block:Implications for the northern boundary of the eastern North China Craton显示文摘LA-ICP-MS zircon U-Pb dating indicates that the Bailiping granitic pluton was em-placed during Late Paleozoic to Early Cretaceous (285―116 Ma) by four distinct magmatic epi-sodes, arguing against the previous thought that the Bailiping granites were emplaced during Archean, Proterozoic or Early Paleozoic. It is suggested that the so-called Archean Jincheng-dong granite-greenstone belt, mainly composed of Bailiping granites, should be broken down. Sr-Nd isotopic compositions of the Bailiping granites are similar to those of the Phanerozoic granites in the Xing’an-Mongolian orogenic belt, suggesting that their parental magmas were mainly derived from a juvenile crust with some contamination of ancient crustal materials during magma rising and/or emplacement. Therefore, the basement of the Helong Block is similar to that in the northern Xing’an-Mongolian Orogenic Belt, but different from that of the North China Craton. It is proposed that the Archean Jinchengdong complex in this area is probably an exotic slice from the North China Craton, which indicates that the Fu’erhe-Gudonghe Fault, located in northern part of the Helong area, is not the boundary between the North China Craton and the Xing’an-Mongolian Orogenic Belt. The possible boundary should be located further southward more than 50 km and near the Baitoushan volcano.ZHANG Yanbin1, WU Fuyuan1, ZHAI Mingguo1 & LU Xiaoping1,2 1. Institute of Geology and Geophysics, Chinese Academy of Sciences, P.O. Box 9825, Beijing 100029, China 2. Regional Geological and Mineral Resources Survey of Jilin Province, Changchun 130062, China 2005Science China Earth Sciences2005,48,10:10
5Highly expressed BMP9/GDF2 in postnatal mouse liver and lungs may account for its pleiotropic effects on stem cell differentiation,angiogenesis,tumor growth and metabolism显示文摘Bone morphogenetic protein 9(BMP9)(or GDF2)was originally identified from fetal mouse liver cDNA libraries.Emerging evidence indicates BMP9 exerts diverse and pleiotropic functions during postnatal development and in maintaining tissue homeostasis.However,the expression landscape of BMP9 signaling during development and/or in adult tissues remains to be analyzed.Here,we conducted a comprehensive analysis of the expression landscape of BMP9 and its signaling mediators in postnatal mice.By analyzing mouse ENCODE transcriptome datasets we found Bmp9 was highly expressed in the liver and detectable in embryonic brain,adult lungs and adult placenta.We next conducted a comprehensive qPCR analysis of RNAs isolated from major mouse tissues/organs at various ages.We found that Bmp9 was highly expressed in the liver and lung tissues of young adult mice,but decreased in older mice.Interestingly,Bmp9 was only expressed at low to modest levels in developing bones.BMP9-associated TGFβ/BMPR type I receptor Alk1 was highly expressed in the adult lungs.Furthermore,the feedback inhibitor Smads Smad6 and Smad7 were widely expressed in mouse postnatal tissues.However,the BMP signaling antagonist noggin was highly expressed in fat and heart in the older age groups,as well as in kidney,liver and lungs in a biphasic fashion.Thus,our findings indicate that the circulating BMP9 produced in liver and lungs may account for its pleiotropic effects on postnatal tissues/organs although possible roles of BMP9 signaling in liver and lungs remain to be fully understood.Wei Liu Zhongliang Deng Zongyue Zeng Jiaming Fan Yixiao Feng Xi Wang Daigui Cao Bo Zhang Lijuan Yang Bin Liu Mikhail Pakvasa William Wagstaff Xiaoxing Wu Huaxiu Luo Jing Zhang Meng Zhang Fang He Yukun Mao Huiming Ding Yongtao Zhang Changchun Niu Rex C.Haydon Hue H.Luu Jennifer Moriatis Wolf Michael J.Lee Wei Huang Tong-Chuan He Yulong Zou 2020Genes & Diseases2020,7,2:9
6Present situation and tendency of saline-alkali soil in west Jilin Province显示文摘Taking west Jilin Province as an example, this paper put forward the assessment index of salinization, and based on it, the authors present the distribution characteristics of saline-alkali soil in the 1980s and the 1990s in west Jilin and analyze its physical and chemical properties in detail. The developing tendency of salinization was also inferred by comparing the saline-alkali soil of the 1980s with that of the 1990s. Finally, the natural and human factors leading to salinization are analyzed.LIU Hui-qing, XU Jia-wei, WU Xiu-qin (Institute of Urban and Environment Science, Northeast Normal University, Changchun 130024, China) 2001Journal of Geographical Sciences2001,11,3:9
7Endovascular therapy for Acute ischemic Stroke Trial (EAST): study protocol for a prospective, multicentre control trial in China显示文摘Background and purpose:5 recent trials have shown the benefit of endovascular treatment for acute ischaemic stroke(AIS)due to large vessel occlusion of the anterior circulation.This study aims to evaluate the safety and efficacy of Solitaire thrombectomy in patients with moderate-to-severe stroke in the Chinese population,which has a high prevalence of intracranial atherosclerosis.Methods and analysis:This multicentre prospective control study will involve 17 stroke centres in China,and plans to recruit 150 patients in the intervention group,and 150 patients in the medical group,in which patients meet enrolment criteria but refuse intervention.Patients with AIS due to large vessel occlusion indicated for treatment with Solitaire stent retriever within 12 hours of symptom onset,and who meet the inclusion and exclusion criteria,will be enrolled in this study.The primary efficacy endpoint is functional independence as defined by a modified Rankin Scale(mRS)score≤2 at 90 days or by functional improvement as defined by mRS,using shift analysis.The procedural efficacy endpoint is arterial recanalisation of the occluded target vessel measured by a modified Thrombolysis in Cerebral Infarction(mTICI)score equal or superior to 2b right following the use of the study device.The primary safety endpoint is symptomatic intracranial haemorrhage(sICH)within 24±3 hours postprocedure.Ethics and dissemination:The protocol was approved by the Ethics Committee at the coordinating centre and by the local Institutional Review Board of each participating centre.Trial registration number:NCT02350283.Zhongrong Miao Xiaochuan Huo Feng Gao Xiaoling Liao Chunjuan Wang Ya Peng Yibin Cao Shengli Chen Meng Zhang Changchun Jiang Xiaoxiang Peng Cunfeng Song Liping Wei Qiyi Zhu Zaiyu Guo Li Liu Hang Lin Hua Yang Wei Wu Hui Liang Anding Xu Kangning Chen Xingquan Zhao Yuesong Pan Hao Li Liping Liu Yilong Wang Yongjun Wang EAST investigators 2016Stroke & Vascular Neurology2016,1,2:8
8Assessment of meteorological disasters based on information diffusion theory in Xinjiang, Northwest China显示文摘洪水,干旱,下得很大的冰雹,和在从 1949 ~ 2012 的 Xinjiang 的低温度事件的数据与散开方法被分析在 Xinjiang 估计灾难的最普通的类型的风险。学习区域的气象学的灾难的频率和紧张显示出与全球温暖联系的一个增加的趋势,这被证明。在灾难的四种类型之中,超过干旱的概率最大,接着由下得很大的冰雹,低温度和洪水列在后面。而且,小浪方法分析表明自从 2000,更大的摆动发生了,它可以与极端气候的变化的出现被联系。频率的空间分发表明 Tianshan 山的北斜坡是一个多重灾区, Tianshan 的南部的斜坡是更多的洪水和下得很大的冰雹发生的区域,并且 Turpan-Hami 盆的西方是区域风是流行的。在影响灾难的区域和相应气象学、社会经济的索引之间的关系也被分析。它显示除了谷物面积,在影响的区域和最气象学、社会经济的指示物之间有重要积极关联。WU Meihua CHEN Yaning XU Changchun 2015Journal of Geographical Sciences2015,25,1:7
9Comprehensive benefit of flood resources utilization through dynamic successive fuzzy evaluation model: A case study显示文摘Taking the flood resources utilization in Baicheng, Jilin during 2002–2007 as the research background, and based on the entropy weight and multi-level & multi-objective fuzzy optimization theory, this research established a multi-level & semi-constructive index system and dynamic successive evaluation model for comprehensive benefit evaluation of regional flood resources utilization. With the year 2002 as the base year, the analyzing results showed that there existed a close positive correlation between flood utilization volume and its benefits, comprehensive evaluation value and its comparison increment. Within the six successive evaluation years, the comprehensive benefit of 2003 was the best, in which the benefit evaluation increment reached 82.8% whereas the year of 2004 was the worst, in which the increment was only 18.2%. Thus the sustainability and correctness of the evaluation were verified by six years successive evaluation and increment comparison. The analyzing results showed that the economic benefits, ecological benefits and social benefits of flood utilization were remarkable, and that the comprehensive benefit could be improved by increasing flood utilization capacity, which would promote the regional sustainable development as well. The established dynamic successive evaluation provides a stable theoretical basis and technical support for further flood utilization.FENG Feng1,2, XU ShiGuo1, LIU JianWei1, LIU Dan1,3 & WU Bo4 1 Institute of Water Environment, School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China 2 Yellow River Conservancy Technical Institute, Kaifeng 475003, China 3 College of Water Resources, Shenyang Agricultural University, Shenyang 110161, China 4 Office of Flood Control and Draught Relief in Jilin Province, Changchun 130033, China 2010Science China(Technological Sciences)2010,53,2:7
10Binary Laser Direct Writing System and Its Applications显示文摘A new laser direct writing system is introduced and the potential application of the diffractive optical elements (DOE’s) fabricated by applying laser direct writing system are presented. The fabrication techniques by applying the laser direct writing are developed. Experimental results have been obtained by applying laser direct writing machine with line width of 5μm and 10μm.LI Feng you,LU Zhen wu,XIE Yong jun, ZHANG Dian wen (Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130022, China) 2001光学精密工程2001,9,5:7
11Preparation and Anti-oxidative Effects of Corn Peptides显示文摘Corn peptides(CP) were prepared from zein via proteolysis by means of a type of alkaline protease, Alcalase, at 50 ℃ and pH 8.0. The anti oxidative activity of the hydrolysate was examined. It was found that the anti oxidative activity reached the maximum at the fourth hour of the hydrolysis and then decreased. The effect of the enzyme dosage on the solubility of corn protein, the dependence of hydrolysis time on the degree of the hydrolysis(DH) and molecular weight distribution were examined respectively. 30% DH was controlled on the basis of anti oxidative activity. The hydrolysate was fractionated on a Sephadex G 15 column. The anti oxidative activities were examined for all the fractions. The main fraction for anti oxidative activity was collected and characterized by the methods of amino acid analysis, the measurement of average chain length and etc .. The main M W distribution of the main fraction was 300-600 Daltons. The anti oxidative properties of the small peptides in vitro were studied. It was found that they could inhibit the auto oxidation of pyrogallol and the oxidation of hemoglobin. The hemolysis degree of erythrocyte caused by hydroxyl free radicals was decreased greatly, indicating a protective effect of the anti oxidative peptides on the cell membrane damage of erythrocyte.XU Li, ZHANG Xue zhong ** , GUO Yi, REN Qiao and WU Xiao xia Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, Jilin University, Changchun 130021, P.R. China 2002Chemical Research in Chinese Universities2002,18,3:5
123D printing of calcium phosphate bioceramic with tailored biodegradation rate for skull bone tissue reconstruction显示文摘The bone regenerative scaffold with the tailored degradation rate matching with the growth rate of the new bone is essential for adolescent bone repair.To satisfy these requirement,we proposed bone tissue scaffolds with controlled degradation rate using osteoinductive materials(Ca-P bioceramics),which is expected to present a controllable biodegradation rate for patients who need bone regeneration.Physicochemical properties,porosity,compressive strength and degradation properties of the scaffolds were studied.3D printed Ca-P scaffold(3DS),gas foaming Ca-P scaffold(FS)and autogenous bone(AB)were used in vivo for personalized beagle skull defect repair.Histological results indicated that the 3DS was highly vascularized and well combined with surrounding tissues.FS showed obvious newly formed bone tissues.AB showed the best repair effect,but it was found that AB scaffolds were partially absorbed and degraded.This study indicated that the 3D printed Ca-P bioceramics with tailored biodegradation rate is a promising candidate for personalized skull bone tissue reconstruction.Boqing Zhang Huan Sun Lina Wu Liang Ma Fei Xing Qingquan Kong Yujiang Fan Changchun Zhou Xingdong Zhang 2019Bio-Design and Manufacturing2019,2,3:5
13Comparison of LaFeO_3,La_(0.8)Sr_(0.2)FeO_3,and La_(0.8)Sr_(0.2)Fe_(0.9)CO_(0.1)O_3 perovskite oxides as oxygen carrier for partial oxidation of methane显示文摘LaFeO 3, La 0.8 Sr 0.2 FeO 3, 和 La 0.8 Sr 0.2 Fe 0.9 公司 0.1 O 3 perovskite 氧化物被连续流动反应和顺序的氧化还原作用反应作为为当气体的氧不在时的甲烷的部分氧化的氧搬运人调查。甲烷被 perovskite 氧化物的氧种类当气体的氧不在时与高选择氧化到 syngas。顺序的氧化还原作用反应表明在氧化还原作用反应的结构的稳定性和连续的氧供应在 La 0.8 Sr 0.2 Fe 0.9 公司 0.1 O 3 氧化物,当时 LaFeO 3 和 La 0.8 Sr 0.2 FeO 3 展出了优秀结构的稳定性和连续的氧供应。Xiaoping Dai Changchun Yu Qiong Wu 2008Journal of Natural Gas Chemistry2008,17,4:4
14STUDY ON CONDUCTIVITY OF TRISUBSTITUTED HETEROPOLYTUNGSTATES GaW_9M_3显示文摘STUDY ON CONDUCTIVITY OF TRISUBSTITUTED HETEROPOLYTUNGSTATES GaW_9M_3STUDYONCONDUCTIVITYOFTRISUBSTITUTEDHETEROPOLYTUNGSTATESG...Xin Wu YU Shu Xia LIU Li WANC Ge WANG Xiu Li WANG En Bo WANG(Department of Chemistry. Northeast Normal University, Changchun 130024) 1996Chinese Chemical Letters1996,7,8:4
15Notch signaling:Its essential roles in bone and craniofacial development显示文摘Notch is a cellecell signaling pathway that is involved in a host of activities including development,oncogenesis,skeletal homeostasis,and much more.More specifically,recent research has demonstrated the importance of Notch signaling in osteogenic differentiation,bone healing,and in the development of the skeleton.The craniofacial skeleton is complex and understanding its development has remained an important focus in biology.In this review we briefly summarize what recent research has revealed about Notch signaling and the current understanding of how the skeleton,skull,and face develop.We then discuss the crucial role that Notch plays in both craniofacial development and the skeletal system,and what importance it may play in the future.Mikhail Pakvasa Pranav Haravu Michael Boachie-Mensah Alonzo Jones Elam Coalson Junyi Liao Zongyue Zeng Di Wu Kevin Qin Xiaoxing Wu Huaxiu Luo Jing Zhang Meng Zhang Fang He Yukun Mao Yongtao Zhang Changchun Niu Meng Wu Xia Zhao Hao Wang Linjuan Huang Deyao Shi Qing Liu Na Ni Kai Fu Michael J.Lee Jennifer Moriatis Wolf Aravind Athiviraham Sherwin S.Ho Tong-Chuan He Kelly Hynes Jason Strelzow Mostafa El Dafrawy Russell R.Reid 2021Genes & Diseases2021,8,1:4
16Synthesis of Osthole Derivatives with Grignard Reagents and Their Larvicidal Activities on Mosquitoes显示文摘osthole 的结构被修改了对蚊子改进它的 larvicidal 活动。有 Grignard 试剂的 osthole 衍生物的新有效合成被开发了,它作为倡导者采用 CuI 和 LiCl 并且盖住大量底层负担得起相应产品在对好收益(多达 83%) 温和。简历活动评估证明几个产品比 osthole 展出了更好的活动。Ming Liu Yang Liu Xuewen Hua Changchun Wu Sha Zhou Baolei Wang Zhengming Li 2015Chinese Journal of Chemistry2015,33,12:4
17Staged angioplasty versus regular carotid artery stenting in patients with carotid artery stenosis at high risk of hyperperfusion:a randomised clinical trial显示文摘Background and purpose Hyperperfusion(HP)is a devastating complication associated with carotid artery stenting(CAS)or endarterectomy.The efficacy and safety of staged angioplasty(SAP)in patients with CAS at high risk of HP remains unclear.We sought to determine whether SAP is superior to regular CAS in patients with high risk of HP.Methods A randomised,multicentre open-label clinical trial with blinded outcome assessment(STEP)was conducted.Patients with severe carotid stenosis at high risk of HP were randomly assigned(1:1)to the SAP or regular CAS group.The primary endpoint was hyperperfusion syndrome(HPS)and intracerebral haemorrhage(ICH)within 30 days after the procedure.Results From November 2014 to January 2017,a total of 64 patients were enrolled in 11 centres.33 patients were allocated to the SAP group and 31 to the regular CAS group.At 30 days,the rate of primary endpoint was 0.0%(0/33)in the SAP group and 9.7%(3/31)in the regular CAS group(absolute risk reduction(ARR),9.7%;95%CI−20.1% to 0.7%;p=0.11).As one of the secondary endpoints,the incidence of HP phenomenon(HPP)was lower in the SAP group than the regular CAS group(0.0%vs 22.6%,ARR,−22.6%;95% CI−36.8%to−10.2%;p=0.04).Conclusion The rate of HPS and ICH was not significantly lower in SAP group;the extended secondary endpoint of HPP,however,significantly reduced,which suggested that SAP may be a safe and effective carotid revascularisation procedure to prevent HP.Dapeng Mo Baixue Jia Huaizhang Shi Yaxuan Sun Qingan Liu Chengzhe Fan Jianping Deng Jinglin Yuan Wei Wu Changchun Jiang Guilian Zhang Hanjun Du Ning Ma Feng Gao Xuan Sun Ligang Song Lian Liu Guangge Peng Yongjun Wang Yilong Wang Zhongrong Miao the STEP Study Group 2021Stroke & Vascular Neurology2021,6,1:3
18Design, Synthesis and Herbicidal Activity of Novel Sulfonylureas Containing Tetrahydrophthalimide Substructure显示文摘HUA Xuewen ZHOU Sha CHEN Minggui ZHANG Dongkai LIU Ming LIU Jingbo WU Changchun LIU Yang LI Yonghong LI Zhengming 2016Chemical Research in Chinese Universities2016,32,3:3
19HYDROXYLATION OF PHENOL BY IRON(Ⅱ)-PHENANTHROLINE(PHEN)/MCM-41 ZEOLITE显示文摘HYDROXYLATIONOFPHENOLBYIRON(Ⅱ)-PHENANTHROLINE(PHEN)/MCM-41ZEOLITE¥ChiBiaoLIU;XingKaiYE;YueWU(ChangchunIustituteofAppliedChemi...Chi Biao LIU Xing Kai YE Yue WU (Changchun Iustitute of Applied Chemistry,Chinese Academy ofsciences, Changchun, 130022,) 1996Chinese Chemical Letters1996,7,3:3
20Key technology of mine underground mobile positioning based on LiDAR and coded sequence pattern显示文摘Technologies of underground mobile positioning were proposed based on LiDAR data and coded sequence pattern landmarks for mine shafts and tunnels environment to meet the needs of fast and accurate positioning and navigation of equipments in the mine underground without satellite navigation signals. A coded sequence pattern was employed for automatic matching of 3D scans. The methods of SIFT feature, Otsu segmentation and fast hough transformation were described for the identification, positioning and interpretation of the coded sequence patterns, respectively. The POSIT model was presented for speeding up computation of the translation and rotation parameters of LiDAR point data, so as to achieve automatic 3D mapping of mine shafts and tunnels. The moving positioning experiment was applied to evaluating the accuracy of proposed pose estimation method from LiDAR scans and coded sequence pattern landmarks acquired in an indoor environment. The performance was evaluated using ground truth data of the indoor setting so as to measure derivations with six degrees of freedom.WANG Zhi1, 2, WU Li-xin1, 2, LI Hui-ying3 1. College of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China 2. Academy of Disaster Reduction and Emergency Management, Ministry of Civil Affairs and Ministry of Education, Beijing Normal University, Beijing 100875, China 3. College of Computer Science and Technology, Jilin University, Changchun 130012, China 2011中国有色金属学会会刊:英文版2011,21,S3:3
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