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| 1 | Fracture characteristics of concrete subjected to impact loading显示文摘This paper takes concrete as a four-phase composite made of the intact matrix and three mutually perpendicular groups of penny-shaped micro-cracks. The intact matrix is assumed to be elastic,homogeneous and isotropic,and the micro-cracks are penny-shaped. Combined with the failure mechanism of concrete subjected to impact loading,a dynamic constitutive model for concrete is developed based on Mori-Tanaka's average stress concept and Eshelby's equivalent inclusion theory. Experimental results show that concrete is rate-dependent. The model predictions are in good agreement with the experimental results. The model may be used to simulate the mechanical behavior of concrete under impact loadings. | LIU HaiFeng1,2,LIU HaiYan3 & SONG WeiDong1 1 State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China 2 School of Civil and Hydraulic Engineering,Ningxia University,Yinchuan 750021,China 3 School of Science,Beijing Institute of Technology,Beijing 100081,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，2： | 12 |
| 2 | EXPERIMENTAL INVESTIGATION AND THERMODYNAMIC CALCULATION ON PHASE PRECIPITATION OF INCONEL 740显示文摘A novel nickel-based superalloy INCONEL 740 was under development for application in ultra-supercritical superheater tubers above 750℃. The precipitation behaviors of η phase and γ’ particles of the alloy were investigated through experimental study and phase computation. Experimental results showed that η phase formed a Widmanst?tten pattern structure following long-term exposure at elevated temperatures and that the coarsening of γ’ particle follows a cube rate law:r-3 ∝ t. Thermodynamic calculation results showed that Al and Ti had an important effect on the precipitation behavior of γ’ andη phases. Two suggested novel modified alloys, wherein the Al and Ti contents were modified, were designed and melted for the experimental study. The preliminary results indicated that the modified alloys exhibited higher structural stability following long-term exposure at 750℃ till 5000h. | S.Q. Zhao* Department of Physics, Ningxia University, Yinchuan 750021, China Y. Jiang Department of Materials Science, The Northwest Second Nationalities Institute, Yinchuan 750021, China J.X. Dong and X.S. Xie High Temperature Materials Research Laboratories, University of Science and Technology Beijing, Beijing 100083, China | 2006 | Acta Metallurgica Sinica(English Letters)2006，19，6： | 11 |
| 3 | Challenges and Solutions for the Additive Manufacturing of H) Biodegradable Magnesium Implants显示文摘Due to their capability of fabricating geometrically complex structures,additive manufacturing(AM)techniques have provided unprecedented opportunities to produce biodegradable metallic implants—especially using Mg alloys,which exhibit appropriate mechanical properties and outstanding biocompatibility.However,many challenges hinder the fabrication of AM-processed biodegradable Mg-based implants,such as the difficulty of Mg powder preparation,powder splash,and crack formation during the AM process.In the present work,the challenges of AM-processed Mg components are analyzed and solutions to these challenges are proposed.A novel Mg-based alloy(Mg-Nd-Zn-Zr alloy,JDBM)powder with a smooth surface and good roundness was first synthesized successfully,and the AM parameters for Mg-based alloys were optimized.Based on the optimized parameters,porous JDBM scaffolds with three different architectures(biomimetic,diamond,and gyroid)were then fabricated by selective laser melting(SLM),and their mechanical properties and degradation behavior were evaluated.Finally,the gyroid scaffolds with the best performance were selected for dicalcium phosphate dihydrate(DCPD)coating treatment,which greatly suppressed the degradation rate and increased the cytocompatibility,indicating a promising prospect for clinical application as bone tissue engineering scaffolds. | Yinchuan Wang Penghuai Fu Nanqing Wang Liming Peng Bin Kang Hui Zeng Guangyin Yuan Wenjiang Ding | 2020 | Engineering2020，6，11： | 10 |
| 4 | 宁夏银川市西夏3号陵园遗址发掘简报显示文摘2000年~2001年,宁夏文物考古研究所等对西夏3号陵园进行了三次发掘,发掘面积2万余平方米。这是西夏陵区帝王陵园地面建筑遗址的第一次系统揭露,出土了大量建筑装饰构件,揭示了陵园月城与陵城垣体、门址、献殿及陵塔、鹊台、角台等建筑的形制、结构和营建规制,为研究西夏建筑、陵寝制度提供了翔实资料。 | NICRA and Yinchuan Municipal Office for the Preservation of the Western Xia Mausoleum Precinct, | 2002 | 考古2002，，8： | 8 |
| 5 | Analysis of Protoscoleces-specific Antigens from Echinococcus Granulosus with Proteomics Combined with Western Blot显示文摘Objective To establish and optimize the proteomic analysis of protoscoleces-specific antigens from Echinococcus granulosus. To provide a foundation for identifying specific antigens in the soluble proteins of E. granulosus protoscoleces for further research. Methods Brood capsules were collected aseptically from fertile E. granulosus cysts from the livers of an infected patient. The fertile E. granulosus cysts were fractured, and protoscoleces were collected by centrifugation. The soluble proteins of protoscoleces were acquired using the 2D Quant kit according to the manufacturer’s instructions. We employed two-dimensional electrophoresis (2-DE) combined with immunoblot assay (Western blot) to analyze the soluble components of E. granulosus protoscoleces antigens. The 2-DE and immunoblot maps obtained were analyzed with PDQuest 8.0 image analysis software. Results About 233 soluble protein spots were identified with Coomassie-stained gels. Most of the proteins had a molecular weight of 16 000 Da to 117 000 Da, and an isoelectric point value of 3.0 to 10.0. 2-DE immunoblot was conducted and 57 specific antigen spots were observed, among which 23 spots were identified. Conclusion 2-DE combined with Western blot is the key to successful proteomic analysis and presents a new possibility for searching the specific E. granulosus protoscoleces antigens. | LI Zong Ji and ZHAO WeiDepartment of Medical Genetics and Cell Biology, Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China Center of Scientific Technology of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China The medical scientific institute of Ningxia, Yinchuan 750004, Ningxia Hui Autonomous Region, China | 2012 | Biomedical and Environmental Sciences2012，25，6： | 7 |
| 6 | Surface characteristics of rapidly solidified nickel-based superalloy pow-ders prepared by PREP显示文摘The surface microstructure and the surface segregation of FGH95 nickel-based superalloy powders prepared through plasma rotating electrode processing (PREP) have been investigated by using SEM and AES. The results indicate that the surface microstructure of powders changes fiom dendrite into cellular structure as the particle size of powders decrease, and the predominant precipitates solidified on the particle surfaces were identified as MC' type carbides enriched with Nb and Ti. It was also indicated that along with the depth of particle surfaces, the segregation layer of S, C and O elements are thick, and that of Ti, Cr elements are thin for large size powders while they are in reverse for median size particles. | CHEN Huanming , HU Benfu , and LI Huiying1) School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China2) School of Physics and Electrical Information Engineering, Ningxia University, Yinchuan 750021, China | 2003 | Rare Metals2003，22，4： | 6 |
| 7 | Archaeological study of ostrich eggshell beads collected from SDG site显示文摘Ostrich eggshell beads and fragments collected from SDG site reflect primordial art and a kind of symbolic behavior of modern humans. Based on stratigraphic data and OSL dating, these ostrich eggshell beads are probably in Early Holocene (< 10 ka BP). Two different prehistoric manufacturing pathways are usually used in the manufacture of ostrich eggshell beads in Upper Paleolithic. According to statistic analysis of the characteristics of ostrich eggshell beads, Pathway 1 is identified from these collections. In pathway 1, blanks are drilled prior to being trimmed to rough discs. They exhibit great potential for the study of the origin of primordial art and the development of ancient cultures and provide important data for studying behavioral options adopted by hominids in SDG area. In addition, they bear important implications for the origin of modern humans in East Asia. | WANG ChunXue1,2,3, ZHANG Yue1,3,4, GAO Xing1,3, ZHANG XiaoLing1,2,3 & WANG HuiMin1,5 1 Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China 2 Graduate School, Chinese Academy of Sciences, Beijing 100039, China 3 Joint Laboratory of Human Evolution and Archaeometry, Chinese Academy of Sciences, Beijing 100044, China 4 State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing 210008, China 5 Ningxia Provincial Institute of Archaeology, Yinchuan 750001, China | 2009 | Chinese Science Bulletin2009，54，21： | 6 |
| 8 | Histopathological Features and Viral Antigen Distribution in the Lung of Fatal Patients with Enterovirus 71 Infection显示文摘Dear Editor,Enterovirus 71(EV71)infection causes hand-foot-andmouth disease(HFMD)in infants and children.Patients with HFMD usually have good prognosis;however,in some extreme cases the infection can be accompanied by central nervous system diseases,eventually leading to cardiorespiratory failure,and even death.Currently。 | Zhenli Liang Hongbo Pan Xijing Wang Yinchuan Zhu Yiwu Dang Xiaohui Fan Lingxi Gao Zengfeng Zhang | 2018 | Virologica Sinica2018，33，3： | 4 |
| 9 | Analysis of the Ecological Migration Pattern in Ethnic Minority Areas——A Case Study of Ningxia Hui Autonomous Region显示文摘By taking Ningxia Hui Autonomous Region as an example,this paper analyzes the ecological migration pattern in ethnic minority areas.The basic patterns of development for poverty relief in Ningxia are in-situ migration and new area development pattern.The new area development pattern includes three types,namely small town development pattern around urban radiation districts,urban labor migration pattern,and large-scale ecological migration pattern.Finally,successful experience of ecological migration in Ningxia is summarized.First,scientific industrial planning shall be made on the basis of proper selection of ecological migration location in immigrant settlement regions.Second,scientific and comprehensive ecological migration policies should be formulated. | ZHANG Yun-yan School of Politics and Law,Ningxia University,Yinchuan 750021,China | 2011 | Asian Agricultural Research2011，3，8： | 4 |
| 10 | Effects of the CNTF-collagen gel-controlled delivery system on rat neural stem/progenitor cells behavior显示文摘The injury of central nervous system (CNS) usually causes the cavity formation. Although transplantation of neural stem/precursor cells (NSPCs) into the lesioned area of CNS has been shown to be implicated in the functional restoration, the therapeutic result is limited by the poor survival of NSPCs as well as their insufficient proliferation and differentiation abilities. Type-1 collagen is considered as a candidate scaffold or drug delivery system to overcome the aforementioned obstacle. This study observed the effects of the CNTF (ciliary neurotrophic factor)-collagen gel-controlled delivery system and daily addition of soluble-form CNTF on the NSPC survival, migration, proliferation and differentiation. The results showed that, within 12 h of the initial co-culture, CNTF was released in a burst pattern, then the CNTF-collagen gel-controlled delivery system stably released CNTF for up to 12 d. The cell viability test, together with immunohistochemistry, RT-PCR and Western blotting, showed that the CNTF-collagen gel-controlled delivery system supported the NSPCs seeded on the surface of collagen gel survival and facilitated their migration and proliferation. The daily addition of soluble-form CNTF to the medium had similar effects to the CNTF-collagen gel-controlled delivery system, but large quantities of soluble-form CNTF were consumed during the entire process. Taken together, the CNTF-collagen gel-controlled delivery system not only provides a physical scaffold for the transplanted NSPCs to adhere and migrate, but also facilitates the NSPC survival, growth and proliferation, simultaneously reducing the consumption of the expensive growth factors. This system may be used to enhance the microenvironment in the lesioned area of CNS. | YANG ZhaoYang1, QIAO Hui2 & LI XiaoGuang1,3 1School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China 2Public Heath School, Ningxia Medical University, Yinchuan 750004, China 3Beijing Institute for Neuroscience, Capital Medical University, Beijing 100069, China | 2010 | Science China(Life Sciences)2010，53，4： | 3 |
| 11 | TWO ITERATION METHODS FOR SOLVING LINEAR ALGEBRAIC SYSTEMS WITH LOW ORDER MATRIX A AND HIGH ORDER MATRIX B:Y=(AB)Y+Ф显示文摘This paper presents optimum an one-parameter iteration (OOPI) method and a multi-parameter iteration direct (MPID) method for efficiently solving linear algebraic systems with low order matrix A and high order matrix B: Y = (A B)Y + Φ. On parallel computers (also on serial computer) the former will be efficient, even very efficient under certain conditions, the latter will be universally very efficient. | Shuang-suo Zhao (Depart. of Math. & Computing Engieering, Ningxia University, Yinchuan, 750021, China) Zhang-hua Luo (Depart. of Math. & Computer Science, Guangxi Normal University, Guilin, 541004, China) Guo-feng Zhang (Depart. of Math., Lanzhou Univers | 2000 | Journal of Computational Mathematics2000，18，4： | 3 |
| 12 | 带电作业电场参数的计算与测量显示文摘带电作业中保证操作人员的安全具有头等的重要性。必须对操作工具和作业步骤进行彻底评估以证实其安全性。这样的评估内容包括对所用工具或所定步骤的实用性及方便性的评定,以及其对电力系统中现有绝缘可能产生的影响。例如。 | Yan.Z Qin.B.L Lin.X Weng.R.YBureau Power Distribution Yinchuan Ningxia People's Republic of China G.Gela 胡敬东 | 1991 | 四川电力技术1991，14，3： | 2 |
| 13 | Late Cenozoic Stratigraphic Sequence and Its Implication to Tectonic Evolution, Hejiakouzi Area, Ningxia Hui Autonomous Region显示文摘The Late Cenozoic stratigraphic sequence and its information of tectonic evolution are obtained here through the detailed petrostratigraphic and magnetostratigraphic study and research of stratigraphic contact and sedmentary faces of the Cenozoic strata profile, Hejiakouzi area, Ningxia Hui Autonomous Region. The intense Cenozoic tectonic deformation began at 10Ma BP in the Haiyuan-Tongxin Syntaxis, the northeastern margin of Qinghai-Xizang Plateau, and a few deformation events occurred during Late Cenozoic Era. | Shen Xuhui, Tian Qinjian, Ding Guoyu, Wei Kaibo, and Chen ZhengweiCenter for Analysis and Prediction, China Seismological Bureau, Beijing 100036, ChinaChai ChizhangSeismological Bureau of Ningxia Hui Autonomous Region, Yinchuan 750001, China | 2001 | Earthquake Research in China2001，15，4： | 2 |
| 14 | Glycyrrhizic acid affords robust neuroprotection in the postischemic brain via anti-inflammatory effect by inhibiting HMGB1 phosphorylation and secretion显示文摘 | Seung-Woo Kim Yinchuan Jin Joo-Hyun Shin Il-Doo Kim Hye-Kyung Lee Sunghyouk Park Pyung-Lim Han Ja-Kyeong Lee | 2012 | Neurobiology of Disease2012，，1： | 1 |
| 15 | Ethyl pyruvate-mediated Nrt'2 activation and hemeoxygenase 1 induction in astrocytes confer protective effects via autocrine and paracrine mechanisms 显示文摘 | Joo HS Seung WK Yinchuan J | 2012 | Neurochem Int2012，61，1： | 1 |
| 16 | What Type of Teacher Leadership Function Effectively in ESL/EFL Classrooms?显示文摘Based on the comparison of different teacher leaderships at present, this article elaborated how the transformational teacher lead ership functions effectively in ESL/EFL classrooms. With the discussion of the prerequisites and the characteristics of the transformational teacher leadership, the writer also described how teachers could achieve this leadership in their classrooms and bring impact on student self-awareness, self-development, and their learning success. | ZHANG Ya-juan (The Foreign Language School of Ningxia Medical University, Yinchuan 750004, China) | 2012 | 海外英语2012，，3X： | 1 |
| 17 | THE IRREGULAR OBLIQUE DERIVATIVE PROBLEM FOR NONLINEAR ELLIPTIC SYSTEMS OF SECOND ORDER显示文摘This paper deals with the irregular oblique derivative boundary value problemfor nonlinear elliptic systems of second order equations in multiply connected domains.Firstly the well-posedness of the irregUlar oblique derivative problem and an a priori es- timate of solutions for the modified boundary value problem are given, afterwards theexistence of solutions for the modified boundary value problem is proved by using theabove estimates of solutions and the Schauder fixed-point theorem. Finally the solVabilityconditions of the original boundary value problem can be derived. | WEN Guochun(Department of Mathematics, Peking University, Beijing 100871, China)ZHAO Chun(Department of Mathematics, Ninyxia University, Yinchuan 750021, China) | 1998 | Systems Science and Mathematical Sciences1998，11，4： | 1 |
| 18 | Studying the Development of Acupuncture & Moxibustin from its Historical Literatures显示文摘StudyingtheDevelopmentofAcupuncture&MoxibustinfromitsHistoricalLiteratures￥ZhaoKai(ShangQiuMedicalSchool,HeNan)Therehavebeenn... | Wang Bai Sun Yu Gao Bixiao(Teaching Hospital of Ningxia Med.Coll.Yinchuan 750004)(Traditional Chinese Medicine of Ningxia Med.Coll.Yinchuan 750004)(Teaching Hospital of Ningxia Med.Coll Yinchuan 750004) | 1995 | 中国针灸1995，15，S2： | 1 |
| 19 | Effect of grain size on the mechanical properties of Mg foams显示文摘The grain size of Mg foams was innovatively refined without alteration of pore structure and relative density by subjecting multi-axial forging(MAF)process to Ti-Mg composite,an intermediary product of the fabrication process of Mg foams where the spherical Ti particles were utilized as the replication material.The feasibility of the MAF process and the grain size effect on the mechanical properties of Mg foams were discussed.The results showed that,with the appropriate strain of 0.24 applied in the MAF process,Ti-Mg composites returned to original physical appearance without generating microcracks.And complete recrystallization was achieved after heat treatment,with the grain size of the MAFprocessed Mg foams two to three orders of magnitude smaller than that of as-cast foam.The mechanical properties of Mg foams were enhanced extensively after grain refinement with the yield strength and the plastic collapse strength increased by 147%and 50.7%,respectively.A revised model integrated by the Hall-Petch law and Gibson-Ashby model was proposed,which gave a good estimation of the yield strength and the plastic collapse strength of Mg foams from the compressive behavior of the corresponding parent material,though a knockdown factor of 0.45 was introduced for the yield strength. | Yinchuan Wang Hua Huang Gaozhi Jia Guizhou Ke Jian Zhang Guangyin Yuan | 2020 | Journal of Materials Science & Technology2020，58，23： | 1 |
| 20 | Variable Structure Control of Distributed Parameter Systems and Application to the System of Heat Process | ZHAO Wenrong Department of Mathematics,Ningxia Education College,Yinchuan,750002 HOU Xuezhang Department of Mathematics,Northeast Normal University,Changchun,130024 | 1994 | Systems Science and Systems Engineering1994，4，3： | 1 |
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