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| 1 | Response to climate change of different tree species and NDVI variation since 1923 in the middle arid region of Ningxia,China显示文摘The normalized difference vegetation index(NDVI)is used extensively to describe vegetation cover and ecological environment change.The purpose of this study was to contrast the response of different tree species growing in the same habitat to climate change and retrieve past NDVI using tree-ring width data from tree cores collected from the transitional zone of Pinus tabulaeformis and Picea crassifolia in the Luoshan Mountains in the middle arid region of Ningxia.Correlation analysis indicated that radial growth of P.tabulaeformis is more sensitive to precipitation and temperature change than that of P.crassifolia.Natural factors such as water availability and heat at this elevation are more suited to the growth of P.crassifolia,and are more advantageous to its renewal and succession.P.crassifolia is probably the better of the two species for protecting the forest ecosystem and conserving water in the Luoshan desertification area.Ring width of P.crassifolia correlates significantly with average NDVI for April–May(r=0.641,p<0.01),and both of them are influenced positively by precipitation in April–May.The reconstructed NDVI for 1923–2007 shows the relatively low vegetation cover occurred in the 1920s–1930s,the1960s–1970s,and the early 21st century.The reconstructed NDVI better reflected the drought climate in the study area. | YaJun Wang RuiJie Lu YuZhen Ma HongWei Meng ShangYu Gao | 2014 | Research in Cold and Arid Regions2014，6，1： | 6 |
| 2 | Strain hardening of as-extruded Mg-xZn(x=1, 2, 3 and 4 wt%) alloys显示文摘The influence of Zn on the strain hardening of as-extruded Mg-x Zn(x = 1, 2, 3 and 4 wt%) magnesium alloys was investigated using uniaxial tensile tests at 10^(-3)s^(-1) at room temperature. The strain hardening rate,the strain hardening exponent and the hardening capacity were obtained from true plastic stress-strain curves. There were almost no second phases in the as-extruded Mg-Zn magnesium alloys. Average grain sizes of the four as-extruded alloys were about 17.8 μm. With increasing Zn content from 1 to 4 wt%, the strain hardening rate increased from 2850 MPa to 6810 MPa at(б-б_(0.2)) = 60 MPa, the strain hardening exponent n increased from 0.160 to 0.203, and the hardening capacity, Hc increased from 1.17 to 2.34.The difference in strain hardening response of these Mg-Zn alloys might be mainly caused by weaker basal texture and more solute atoms in the α-Mg matrix with higher Zn content. | Chaoyue Zhao Xianhua Chen Fusheng Pan Jingfeng Wang Shangyu Gao Teng Tu Chunquan Liu Jiahao Yao Andrej Atrens | 2019 | Journal of Materials Science & Technology2019，35，1： | 4 |
| 3 | Reconstructing the annual precipitation variation since 1899 based on tree-ring width in the western Hedong sandy land of Ningxia显示文摘Based on the analysis of the correlation between the tree-ring width of Pinus tabulaeformis and the climate factors in the western Hedong sandy land of Ningxia, a conversion equation between the annual precipitation and the tree-ring width since 1899 was reconstructed. The results of cross verification indicated that the conversion equation is stable and the reconstructed results are reliable. The result of reconstructed annual precipitation showed the remarkable fluctuation of precipitation and dry-to-wet variation before the 1940s. The smaller fluctuation and high frequent changes of precipitation occurred during the period of 1940s-1980s and after the 1980s the change trend of the precipitation became high periodic extent and low frequent. The study found that there were some coincidences with the climate change in Changling Mountains, Helan Mountains and the east of Qilian Mountains. The relatively dry periods in the beginning of 20th century, 1920s to 1930s, the end of the 20th century and 2004 to 2006 in the western Hedong sandy land of Ningxia accelerated the desertification, while the relatively humid period during the periods of the 1910s-1920s, 1930s-1940s and 1990s is favorable to prevent and control the desertification, and to weaken the climate warming and drying. The periods of annual precipitation variation in the western Hedong sandy land of Ningxia since 1899 are approximately 2-4 years, 5-7 years and 10 years. | Wang, YaJun Gao, ShangYu Ma, YuZhen Lu, RuiJie Sang, YanLi Meng, HongWei | 2010 | Journal of Arid Land2010，2，4： | 3 |
| 4 | Effects of Y and Zn additions on electrical conductivity and electromagnetic shielding effectiveness of Mg-Y-Zn alloys显示文摘Microstructure, electrical conductivity, and electromagnetic interference(EMI) shielding effectiveness(SE) of cast Mg-x Zn-y Y(x = 2–5, y = 1–10) alloys were systematically investigated to understand the effects of Zn and Y additions on electrical conductivity and electromagnetic shielding effectiveness of the alloys.Experimental results indicate that the electrical conductivity and SE of the Mg-x Zn-y Y alloys decrease with Y/Zn ratio. Electrical conductivity is the main factor that affects the electromagnetic shielding properties and the variation tendency of electromagnetic shielding properties of the Mg-x Zn-y Y alloys is consistent with conductivity. Valence of Y and Zn atoms, configuration of extranuclear electron and volumetric difference are main reasons for the variations in the electrical conductivity. A high density of second phase and the formation of semi-continuous network structure can also improve the SE value at high frequencies. | Lizi Liu Xianhua Chen Jingfeng Wang Liying Qiao Shangyu Gao Kai Song Chaoyue Zhao Xiaofang Liu Di Zhao Fusheng Pan | 2019 | Journal of Materials Science & Technology2019，35，6： | 2 |
| 5 | Wind tunnel measurements of adobe abrasion by blown sand: profile characteristics in relation to wind velocity and sand flux 显示文摘 | Liu Lianyou Gao Shangyu Shi Peijun | 2003 | Journal of Arid Environments2003，53，： | 1 |
| 6 | Drag coefficients and Roughness length as disturbed by artificial standing vegetation显示文摘 | Dong Zhibao Gao Shangyu Fryrear Donald W | 2001 | Journal ofArid Environments2001，49，3： | 1 |
| 7 | Holocene aeolian activity and climatic change in Qinghai Lake Basin, northeastern Qinghai-Tibetan Plateau 显示文摘 | LU Ruijie JIA Feifei GAO Shangyu | 2015 | Palaeogeography Palaeoclimatology Palaeoecology2015，430，： | 1 |
| 8 | Modeling the roughness properties of artificial soil clods显示文摘 | Dong Zhibao Fryrear D W Gao Shangyu | 1999 | Soil Science1999，164，12： | 1 |
| 9 | Exome sequencing identifies rare mutations of LDLR and QTRT1 conferring risk for early-onset coronary artery disease in Chinese显示文摘Despite the advances made over the past decades,the known loci for coronary artery disease(CAD)still only explain<20%of the genetic variation in risk[1,2].The known loci with the strongest effects usually confer a 20%-37%increased CAD risk and the most loci modulate risk by≤10%[1].While most of the current data are from European populations,the use of trans-ethnic analyses could be helpful to identify additional loci.Genetic inheritance may impose a high burden on early-onset coronary artery disease(EOCAD). | Kang Yao Yuxiang Dai Juan Shen Yi Wang Huanjie Yang Runda Wu Qijun Liao Hongyi Wu Xiaodong Fang Shalaimaiti Shali Lili Xu Meng Hao Chenhao Lin Zhonghan Sun Yilian Liu Mengxin Li Zhen Wang Qiang Gao Shuning Zhang Chenguang Li Wei Gao Lei Ge Yunzeng Zou Aijun Sun Juying Qian Li Jin Shangyu Hong Yan Zheng Junbo Ge | 2022 | National Science Review2022，9，8： | 1 |
| 10 | A study on shrinkages during the carbonization of bamboo显示文摘 | Zuo Songlin GAO Shangyu RUAN Xigen | 2003 | Journal of Nanjing Forestry University (Natural Sciences Edition)2003，3，27： | 1 |
| 11 | Drag coefficients and Roughness length as disturbed by artificial standing vegetation显示文摘 | Dong Zhibao Gao Shangyu Fryrear Donald W | 2001 | Journal of Arid Environments2001，49，3： | 1 |
| 12 | Carbonization mechanism of bamboo (Phyllostachys) by means of fourier transform infrared and elemental analysis显示文摘 | ZUO Songlin GAO Shangyu YUAN Xigen | | 0，，01： | 1 |
| 13 | Modeling the develop- ment of sand transport显示文摘 | Dong Zhibao Fryrear D W Gao Shangyu | 1999 | Soil Science1999，12，： | 1 |
| 14 | Modeling the development of sand transport显示文摘 | Dong Zhibao Fryrear D W Gao Shangyu | 1999 | Soil Scwnce1999，12，： | 1 |
| 15 | Drag coefficients and roughness length as disturbed by artificial standing vegetation显示文摘 | Dong Zhibao Gao Shangyu Fryrear D W | 2001 | Journal of Arid Environment2001，49，3： | 1 |
| 16 | Drag coefficients and roughness length as disturbed by artificial standing vegetation显示文摘 | Dong Zhibao Gao Shangyu Fryrear D W | 2001 | Journal of Arid Environmenta2001，49，3： | 1 |
| 17 | Drag coefficients and Roughness length as disturbed by artificial standing vegetation显示文摘 | GAO SHANGYU FRYREAR DONALD W | 2001 | Journal of Arid Environments2001，49，3： | 1 |
| 18 | Drag coefficients and roughness length as disturbed by artificial standing vegetation显示文摘 | Dong Zhibao Gao Shangyu Fryrear D W | 2001 | Journal of Arid Environments2001，49，3： | 1 |
| 19 | Responses of NPP of salinized meadows to global change in hyperarid regions显示文摘 | ZHANG HONG GAO SHANGYU ZHENG QIUHONG | 2002 | Journal of Arid Environments2002，50，： | 1 |
| 20 | The effect of surface-free energy and microstructure on the condensation mechanism of water vapor显示文摘Obtaining high-water-yield drinking water in arid areas without consuming energy is still a global challenge.Since water vapor is ubiquitous,atmospheric water harvesting technologies are undoubtedly one of the most promising candidates.A typical water condensation process is analyzed in this paper(nucleation,self-growth,coalescence and sliding).The mechanisms of interactions between adsorbate and water vapor are discussed.The effect of surface-free energy and microstructure on water vapor condensation is described.Finally,the main problems in developing more efficient,high-water-mass and high-cycle-stability atmospheric water collectors are summarized,and the future development trend has been prospected. | Shangsheng Zhang Shuman Xu Yang Liu Ruicheng Lei Tianli Guo Yao Yao Shangyu Gao Jun Ding Zengzhi Zhang | 2023 | Progress in Natural Science:Materials International2023，33，1： | 0 |
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