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| 1 | Simulated change in the near-surface soil freeze/thaw cycle on the Tibetan Plateau from 1981 to 2010显示文摘The near-surface freeze/thaw cycle in cold regions plays a major role in the surface energy budget,hydrological activity,and terrestrial ecosystems.In this study,the Community Land Model,Version 4 and a suite of high-resolution atmospheric data were used to investigate the changes in the near-surface soil freeze/thaw cycle in response to the warming on the Tibetan Plateau from1981 to 2010.The in situ observations-based validation showed that,considering the cause of scale mismatch in the comparison,the simulated soil temperature,freeze start and end dates,and freeze duration at the near-surface were reasonable.In response to the warming of the Tibetan Plateau at a rate of approximately 0.44°C decade-1,the freeze start-date became delayed at an area-mean rate of1.7 days decade-1,while the freeze end-date became advanced at an area-mean rate of 4.7 days decade-1.The delaying of the freeze start-date,which was combined with the advancing of the freeze end-date,resulted in a statistically significant shortening trend with respect to the freeze duration,at an area-mean rate of 6.4 days decade-1.Such changes would strongly affect the surface energy flux,hydrological processes,and vegetation dynamics.We also found that the rate of freeze-duration shortening at the near-surface soil layer was approximately 3.0 days decade-1lower than that at a depth of 1 m.This implied that the changes in soil freeze/thaw cycles at the near surface cannot be assumed to reflect the situation in deeper soil layers.The significant correlations between freeze duration and air temperature indicated that the shortening of the near-surface freeze duration was caused by the rise in air temperature,which occurred especially in spring,followed by autumn.These results can be used to reveal the laws governing the response of the near-surface freeze/thaw cycle to climate change and indicate related changes in permafrost. | Donglin Guo Huijun Wang | 2014 | Chinese Science Bulletin2014，59，20： | 19 |
| 2 | Climatic change features of fog and haze in winter over North China and Huang-Huai Area显示文摘This paper revealed the climatic change characteristics of fog and haze of different levels over North China and Huang-Huai area(NCHH).It was found that the haze-prone period has changed from winter into a whole year,and the haze days(HD)in winter have increased significantly.The foggy days(FD)are half of HD.There are little difference on the number of days and trends of fog at various levels.The HD and FD show no obvious positive correlation until the 1980s.Fog has larger spatial scale,showing more in the south than in the north.Haze occurs mainly around large cities with a discrete distribution.In the background of weakened East Asian Winter Monsoon(EAWM)and sufficient particulate matter,the negative correlation between haze and wind speed is weakened,but the positive correlation between haze and moisture conditions(precipitation and humidity)is significantly strengthened.In recent years,small wind and variability appear frequently.Meanwhile,as the stable source and strong moisture absorption of the aerosol particles,the moisture condition becomes one key control factor in the haze,especially wet haze with less visibility.In contrast,the FD presents a stable positive correlation with precipitation and relative humidity,but has no obvious negative correlation with wind speed. | YIN ZhiCong WANG HuiJun GUO WenLi | 2015 | Science China Earth Sciences2015，58，8： | 19 |
| 3 | De novo mutation in ATP6V1B2 impairs lysosome acidification and causes dominant deafness-onychodystrophy syndrome显示文摘 | Yongyi Yuan Jianguo Zhang Qing Chang Jin Zeng Feng Xin Jianjun Wang Qingyan Zhu Jing Wu Jingqiao Lu Weiwei Guo Xukun Yan Hui Jiang Binfei Zhou Qi Li Xue Gao Huijun Yuan Shiming Yang Dongyi Han Zixu Mao Ping Chen Xi Lin Pu Dai | 2014 | Cell Research2014，24，11： | 13 |
| 4 | The responses of East Asian Summer monsoon to the North Atlantic Meridional Overturning Circulation in an enhanced freshwater input simulation显示文摘We investigated the response of the East Asian Summer Monsoon (EASM) to a weakened Atlantic Meridional Overturning Circulation (AMOC) and its mechanism in an enhanced freshwater input experiment (FW) by using a fully-coupled climate model. The response was a weakened EASM and the mechanisms can be explained as follows. The simulated weakened AMOC resulted in a drop in sea surface temperature (SST) in the North Atlantic (NA) and, correspondingly, an anomalous high sea level pressure (SLP) over the North American regions, which in turn increased the northeast surface winds across the equator in the eastern tropical Pacific (ETP). The anomalous northeast winds then induced further upwelling in the ETP and stronger air/sea heat exchange, therefore leading to an anomalous cooling of the eastern tropical sea surface. As a result, the climatologic Hadley Circulation (HC) was weakened due to an anomalous stronger sinking of air in the ETP north of the equator, whereas the Walker Circulation (WC) in the western tropical Pacific (WTP) north of the equator was strengthened with an eastward-shifted upwelling branch. This feature was in agreement with the anomalous convergent winds in the WTP, and led to a weakened EASM and less East Asian summer precipitation (EASP). Furthermore, comparison with previous freshwater experiments indicates that the strength of EASP could be influenced by the magnitude of the added freshwater. | YU Lei GAO YongQi WANG HuiJun GUO Dong LI ShuangLin | 2009 | Chinese Science Bulletin2009，54，24： | 11 |
| 5 | Comparison of a Very-fine-resolution GCM with RCM Dynamical Downscaling in Simulating Climate in China显示文摘Regional climate simulation can generally be improved by using an RCM nested within a coarser-resolution GCM.However, whether or not it can also be improved by the direct use of a state-of-the-art GCM with very fine resolution, close to that of an RCM, and, if so, which is the better approach, are open questions. These questions are important for understanding and using these two kinds of simulation approaches, but have not yet been investigated. Accordingly, the present reported work compared simulation results over China from a very-fine-resolution GCM(VFRGCM) and from RCM dynamical downscaling. The results showed that:(1) The VFRGCM reproduces the climatologies and trends of both air temperature and precipitation, as well as inter-monthly variations of air temperature in terms of spatial pattern and amount, closer to observations than the coarse-resolution version of the GCM. This is not the case, however, for the inter-monthly variations of precipitation.(2) The VFRGCM captures the climatology, trend, and inter-monthly variation of air temperature, as well as the trend in precipitation, more reasonably than the RCM dynamical downscaling method.(3) The RCM dynamical downscaling method performs better than the VFRGCM in terms of the climatology and inter-monthly variation of precipitation. Overall,the results suggest that VFRGCMs possess great potential with regard to their application in climate simulation in the future,and the RCM dynamical downscaling method is still dominant in terms of regional precipitation simulation. | Donglin GUO Huijun WANG | 2016 | Advances in Atmospheric Sciences2016，33，5： | 9 |
| 6 | Effect of treatment course of comprehensive intervention with Traditional Chinese Medicine on mortality of acquired immunodeficiency syndrome patients treated with combined antiretroviral therapy显示文摘OBJECTIVE:To investigate the effect of a treatment course of comprehensive intervention with Traditional Chinese Medicine(TCM) on the mortality of patients with acquired immunodeficiency syndrome(AIDS) treated with combined antiretroviral therapy(c ART).METHODS:AIDS patients who had taken c ART in a national TCM human immunodeficiency virus treatment trial program(NTCMTP) before 2009 were enrolled in this study and followed for 36 months from November 2009.Patients enrolled in the NTCMTP in 2004 were taken as the first group,those enrolled in 2006 as the second group,and those enrolled in 2009 as the third group.Cumulative survival rates were calculated by the life table method.Survival curves for subgroups were compared by the log-rank test.Hazard ratios were calculated with a Cox proportional hazards model.RESULTS:A total of 1443 AIDS patients were followed for 3 years(4198 person-years).During this period,91(6.3%) patients died and 13(0.9%) were lost to follow-up.The total mortality rate was 2.17/100 person-years.The mortality rate of patients enrolled in the NTCMTP in 2004 was 1.49/100 person-years,which was lower than that of patients enrolled in 2006(2.23/100 person-years) and 2009(3.48/100 person-years).After adjusting for other factors,a shorter time of treatment with TCM,male sex,older age,lower CD4 + T-cell counts,and long-term treatment with c ART were risk factors of mortality.CONCLUSION:Long-term treatment with TCM decreased the mortality risk of AIDS patients.Factors such as being male,older age,CD4+ T-cell counts,and time of treatment with TCM and c ART were correlated with mortality. | Guo Huijun Wang Jian Li Zhengwei Jiang Ziqiang Xu Qianlei Xu Liran | 2016 | Journal of Traditional Chinese Medicine2016，36，4： | 9 |
| 7 | Survival of people living with HIV after treatment with Traditional Chinese Medicine in Henan province of China: a retrospective cohortstudy显示文摘OBJECTIVE: To provide survival estimates of people living with human immunodeficiency virus(PLHIV) after treatment with Traditional Chinese Medicine(TCM) in rural China, to identify the prognostic factors at enrollment, and to explore the effectiveness of TCM intreating PLHIV.METHODS: PLHIV who enrolled in national TCM HIV treatment trial program in October 2004 were analyzed in this study and followed up to October 2010. Survival time was estimated by the Kaplan-Meier curve and hazard ratios, and identifying prognostic factors were computed through Cox proportional hazard models.RESULTS:A total of 1666 PLHIV were included with 102 591 person-months of follow-up. Overall, 312(18.7%) patients died. The total mortality rate over the study period was 3.6 per 100 person-years,which was lower than the worldwide rate. The cumulative survival rate was 95.9% at 1 year[95% confidence interval(CI)(94.8-96.8)] and 80.4% at 6years [95% CI(78.4-82.3)]. Elevated death risks emerged among males, older individuals, and thosewithlowerCD4+T-cellcounts.CONCLUSION: TCM could increase survival and lengthen the life span of PLHIV in Henan province of China, as shown by our retrospective cohort study. Factors such as sex, age, education, and CD4+ T-cell counts correlated to survival. However,retrospective cohorts bias the data, so more prospective studies should be performed to confirm our primary results. | Yantao Jin Zhibin Liu Xiumin Chen Xin Wang Dan Wang Ziqiang Jiang Ying Liu Jian Wang Wen Zou Huijun Guo Liran Xu | 2014 | Journal of Traditional Chinese Medicine2014，34，4： | 8 |
| 8 | Differences in acquired immune deficiency syndrome treatment and evaluation strategies between Chinese and Western Medicine显示文摘Complementary and alternative medicine, including Chinese medicine(CM), has been used to treat acquired immune deficiency syndrome(AIDS) for almost 30 years. We aimed to compare the main differences between AIDS treatment and evaluation strategies between CM and Western Medicine(WM), and analyze advantages and disadvantages.The characteristics of integrative medicine(IM),based on CM and WM, include a patient-centered mode of medicine based on evidence. IM focuses on complex intervention and management with systemic and individual treatment. The evaluation indexes of IM might consist of objective indicators and subjective indexes. IM might be a more valuable method for treating AIDS in the future instead of WM or CM alone. | Liu Zhibin Li Xia Yang Jiping Xu Liran Guo Huijun | 2015 | Journal of Traditional Chinese Medicine2015，35，6： | 8 |
| 9 | Fuzhengpaidu granule regulates immune activation molecules CD38 and human leukocyte antigen-D related on CD4+ and CD8+ T cells in patients with acquired immunodeficiency syndrome/human immunodeficiency virus显示文摘OBJECTIVE: To evaluate the effect of Fuzhengpaidu granule (FZPDG) on immune activation molecules CD38 and human leukocyte antigen-D related (HLA-DR) on CD4+ and CD8+ cells in HIV/AIDS patients, and to explore the underlying mechanism of this therapy. METHODS: Plasma changes in CD3+, CD4+, CD8+, CD3+CD4+CD38+, CD3+CD4+HLA-DR+, CD3+ CD8+CD38+, and CD3+CD8+HLA-DR+levels in HIV/ AIDS patients treated with FZPDG for six months were examined by flow cytometry and compared with levels in healthy controls. RESULTS: The clinical trial included 34 outpatients with HIV/AIDS. Before treatment, plasma levels of CD38+ and HLA-DR+ on CD4/CD8 cells were higherthan those in 28 health controls (P<0.05). There were no significant changes in serum levels of CD3+, CD4+, and CD8+ T cells between pretreatment baseline versus after treatment, which were 82.85% ± 5.41% , 14.57% ± 10.31% and 54.55% ± 11.43% before treatment and 79.15% ± 8.21% , 19.96% ± 9.58% and 56.36% ± 11.67% after treatment, respectively (P>0.05). Plasma levels of CD3+ CD4+CD38+and CD3+CD4+HLA-DR+were 2.3%± 2.2% and 7.8%±5.5% before treatment and 1.2%± 0.8% and 2.6%±1.0% after treatment, respectively. Plasma levels of CD3+CD8+CD38+ and CD3+CD8+ HLA-DR+ were 41.4%±13.4% and 17.8%±11.3% beforetreatment,whichchangedto27.1%±10.2%and 3.8%±2.4%aftertreatment,respectively(P<0.05). CONCLUSION: HIV/AIDS patients exhibited an immune activation profile following FZPDG treatment. A potential mechanism of action for FZPDG appears to lie in its ability to up-regulate CD38 and HLA-DR levels on CD4+ T cells, and down-regulate them on CD8+ cells, thereby modulating immune activation of CD4+and CD8+T cells. | Feng Jiang Rongxin Zhang Zhenfang Gu Huailing Zhang Huijun Guo Xin Deng Jian Liang | 2013 | Journal of Traditional Chinese Medicine2013，33，4： | 8 |
| 10 | Cloning and functional characterization of Rht8,a“Green Revolution”replacement gene in wheat显示文摘Dear Editor,Wheat(Triticum aestivum)is a major staple crop in the world and provides~20%of the food calories for human consumption(Appels et al.,2018).During the 1960s and 1970s,the introduction of two semi-dwarfing genes Rht-B1b and Rht-D1b in wheat varieties strikingly improved lodging resistance and harvest index,and therefore substantially increased grain yield,resulting in the well-known'Green Revolution'(Peng et al.,1999).However,plants carrying Rht-B1b and Rht-D1b suffer from several drawbacks. | Hongchun Xiong Chunyun Zhou Meiyu Fu Huijun Guo Yongdun Xie Linshu Zhao Jiayu Gu Shirong Zhao Yuping Ding Yuting Li Jiazi Zhang Ke Wang Xuejun Li Luxiang Liu | 2022 | Molecular Plant2022，15，3： | 7 |
| 11 | The influence of Sc addition on microstructure and tensile mechanical properties of Mg-4.5Sn-5Zn alloys显示文摘The microstructure and tensile properties of the as-cast and as-rolled Mg-4.5Sn-5Zn alloys by adding various Sc content were investigated.Improvement of the tensile properties in as-cast Sc-containing alloys is attributed to the grain refinement and modification of secondary phase morphology.Three types of precipitates,namely spherical Mg2Sn,rod-like MgZn and Sc-rich phases were dispersed in the matrix of the Sc added M g-4.5Sn-5Zn alloys after hot rolling deformation.In addition,weakening and deflecting of the basal texture in as-rolled alloys were found and were attributed to Sc addition.Further increasing the Sc addition rate to 0.4 wt.%,however,resulted in the clustering of the Sc-rich phases and was found to reduce the tensile properties of the alloy,especially the elongation.The as-rolled Mg-4.5Sn-5Zn-0.3Sc alloy exhibits an optimum combination of tensile properties.The ultimate tensile strength,yield strength and elongation are 293.0MPa,164.2Mpa and 21.5%,respectively,and the elongation is about 68%higher than that of Sc-free alloy. | Pengqi Wang Enyu Guo Xuejian Wang Huijun Kang Zongning Chen Zhiqiang Cao Tongmin Wang | 2019 | Journal of Magnesium and Alloys2019，7，3： | 6 |
| 12 | Comment on the intervention of Traditional Chinese Medicine on survival rates of patients living with human immunodeficiency virus and acquired immune deficiency syndrome显示文摘Despite many differences between Traditional Chinese Medicine(TCM) and conventional medicine,the use of TCM in the treatment of human immunodeficiency virus and acquired immune deficiency syndrome(HIV/AIDS) is increasingly recognized and accepted by patients. Recent research findings on the benefits of Chinese herbal medicine on long-term survival in patients with HIV/AIDS are encouraging and hopeful, but inconclusive. More research is needed. | Li Qiang Liu Zhibin Yang Jiping Guo Huijun Xu Liran | 2016 | Journal of Traditional Chinese Medicine2016，36，3： | 5 |
| 13 | Prevalence of liver injury among patients with acquired immunodeficiency syndrome treated with highly active antiretroviral therapy in China显示文摘OBJECTIVE: To estimate the prevalence of liver injury among patients with acquired immunodeficiency syndrome(AIDS) who received highly active antiretroviral therapy(HAART) in rural Henan Province in China, and to explore whether Traditional Chinese Medicine(TCM) treatment based on HAART would increase this risk.METHODS: This was a retrospective cross-sectional study. We collected medical information on patients with AIDS from two treatment databases in2014. Criteria established by the AIDS Clinical Trials Group in 1996 were used for grading liver injury,classified based on the limit of normal(ULN) for alanine transaminase and aspartate aminotransferase:grade 1(1.25-2.5 × ULN); grade 2(2.6-5 × ULN);grade 3(5.1-10 × ULN); and grade 4(> 10 × ULN).Factors associated with liver injury were evaluated using a logistic regression model.RESULTS: A total 6953 patients with AIDS(3324 male and 3629 female patients) were enrolled into this study. The prevalence of liver injury was 22.0%(18.0% grade 1, 3.1% grade 2, 0.9% grade 3). In multivariate analysis, patients aged 34-45 years were more likely to have liver injury than patients in other age groups [adjusted odds ratio(AOR), 1.39; 95%CI, 1.01-1.91)]. Other factors associated with liver injury included male sex(AOR, 1.64; 95% CI,1.46-1.85), HIV infection via blood(AOR, 1.47; 95%CI, 1.19-1.82), hepatitis B virus antibody positive(AOR, 1.07; 95% CI, 0.85-1.36), and hepatitis C virus(HCV) antibody positive(AOR, 2.76; 95% CI,2.28-3.34).CONCLUSION: The prevalence of liver injury was relatively high among HAART-experienced patients. Several factors associated with liver injury included male sex, age 35-45 years old, HIV infection through blood, and concurrent HCV infection. TCM had no relationship with liver injury in patients receiving HAART. | Yuan Jun Xu Qianlei Chen Xiumin Meng Pengfei Li Qingya Xu Liran Meng Xiangle Jin Yantao Guo Huijun | 2019 | Journal of Traditional Chinese Medicine2019，39，2： | 5 |
| 14 | Reliability and validity of dermatology life quality index: assessment of quality of life in human immunodeficiency virus/acquired immunodeficiency syndrome patients with pruritic papular eruption显示文摘OBJECTIVE: To test the reliability and validity of dermatology life quality index(DLQI) in simplified Chinese language by assessing the quality of life(QoL) in HIV(human immunodeficiency virus)/AIDS(Acquired immunodeficiency syndrome) patients with pruritic papular eruption(PPE). METHODS: A study of simplified-Chinese-versiond from10 questions with the principal component analysis and the contribution rate of the 3 common factors was 59.95%. CONCLUSION: The simplified-Chinese-version DIQL is an acceptable and valid scale for HIV/AIDS patients with PPE. It can be used to evaluate the QoL of HIV/AIDS patients with PPE in China. | Zhibin Liu Zheng Xie Li Zhang Yantao Jin Huijun Guo Ziqiang Jiang Xiumin Chen Jun Yuan | 2013 | Journal of Traditional Chinese Medicine2013，33，5： | 5 |
| 15 | Microstructural characteristics and mechanical behavior of B4Cp/6061Al composites synthesized at different hot-pressing temperatures显示文摘B4Cp/6061Al composites have become important structural and functional materials and can be fabricated by powder metallurgy and subsequent hot rolling. In this work, the effects of the hot-pressing temperature on microstructures and mechanical behaviors of the B4Cp/6061Al composites were investigated. The results showed that compared with the T4 heat treated B4Cp/6061Al composite hot pressed at 560℃, the yield strength and failure strain of the composites hot pressed at 580℃ were increased to 235 MPa and 18.4%, respectively. This was associated with the interface bonding strength between the B4C particles and the matrix. However, the reaction products, identified to be MgAl2O4 phases, were detected in the composites hot pressed at 600℃. The formation of the MgAl2O4 phases resulted in the Mg depletion, thus reducing the yield strength to 203.5 MPa after the T4 heat treatment due to the effect of the solid solution strengthening being weakened. In addition, the variation of hardness and electrical conductivity was mainly related to the Mg content in the matrix. Based on the as-rolled microstructures observed by SEM, SR-μCT and fracture surfaces, the deformation schematic diagram was depicted to reflect the tensile deformation process of the composites. | Minqiang Gao Zongning Chen Huijun Kang Enyu Guo Rengeng Li Ying Fu Honglan Xie Tongmin Wang | 2019 | Journal of Materials Science & Technology2019，35，8： | 4 |
| 16 | Heavy oil component characterization with multi-dimensional unilateral NMR显示文摘Heavy oil is a complicated mixture and a potential resource and has attracted much attention since the end of last century. It is important to characterize the composition of heavy oil to enhance its recovery efficiency. A designed unilateral Nuclear Magnetic Resonance (NMR) sensor with a Larmor frequency of 20 MHz and a well-defined constant gradient of 23.25 T/m was employed to acquire three-dimensional (3D) data for three heavy oil samples. The highly-constant gradient is advantageous for diffusion coefficient measurement of heavy oil. A fast data-implementation procedure including specially designed 3D pulse sequence and Inversion Laplace Transform (ILT) algorithm was adopted to process the data and extract 3D T1-D-T2 probability function. It indicates that NMR relaxometry and diffusometry are useful to characterize the components of heavy oil samples. NMR results were compared with independent measurements of fractionation and gas chromatography analysis. | Liu Huabing Xiao Lizhi Guo Baoxin Zhang Zongfu Zong Fangrong Deng Feng Yu Huijun V.Anferov S.Anferova | 2013 | Petroleum Science2013，10，3： | 4 |
| 17 | Optimization of broadband omnidirectional antireflection coatings for solar cells显示文摘Broadband and omnidirectional antireflection coating is generally an effective way to improve solar cell efficiency, because the destructive interference between the reflected and incident light can maximize the light transmission into the absorption layer. In this paper, we report the incident quantum efficiency ηin, not incident energy or power, as the evaluation function by the ant colony algorithm optimization method, which is a swarm-based optimization method. Also, SPCTRL2 is proposed to be incorporated for accurate optimization because the solar irradiance on a receiver plane is dependent on position, season, and time. Cities of Quito, Beijing and Moscow are selected for two-and three-layer antireflective coating optimization over λ = [300,1100] nm and θ = [0°, 90°]. The ηin increases by 0.26%, 1.37% and 4.24% for the above 3 cities, respectively, compared with that calculated by other rigorous optimization algorithms methods, which is further verified by the effect of position and time dependent solar spectrum on the antireflective coating design. | Xia Guo Qiaoli Liu Huijun Tian Ben Li Hongyi Zhou Chong Li Anqi Hu Xiaoying He | 2019 | Journal of Semiconductors2019，40，3： | 4 |
| 18 | Evolution of permafrost in Northeast Chinasince the Late Pleistocene显示文摘In Northeast China, permafrost advanced and retreated several times under the influences of fluctuating paleo-climates and paleo-environments since the Late Pleistocene. During the last 60 years, many new data were obtained and studies were conducted on the evolution of permafrost in Northeast China, but so far no systematic summary and review have been made. Based on sedimentary sequences, remains of past permafrost, paleo-flora and-fauna records, and dating data, permafrost evolution since the Late Pleistocene has been analyzed and reconstructed in this paper. Paleo-temperatures reconstructed from the remains of past permafrost and those from paleo-flora and-fauna are compared, and thus the southern limit of permafrost(SLP) in each climate period is inferred by the relationship of the permafrost distribution and the mean annual air/ground temperatures(MAAT/MAGT). Thus, the evolutionary history of permafrost is here divided into five stages:(1) the Late Pleistocene(Last Glaciation, or LG)(65 to 10–8.5 ka), the Last Glaciation Maximum(LGM, 21–13 ka) in particular, the coldest period in the latest history with a cooling of about 6~10 ?C, characterized by extensive occurrences of glaciation, flourishing Mammathas-Coelodonta Faunal Complex(MCFC), widespread aeolian deposits, and significant sea level lowering, and permafrost greatly expanded southwards almost to the coastal plains(37?N–41?N);(2) the Holocene Megathermal Period(HMP, 8.5–7.0 to 4.0–3.0 ka), 3~5 ?C warmer than today, permafrost retreated to about 52°N;(3) the Late Holocene Cold Period(Neoglaciation)(4.0–3.0 to 1.0–0.5 ka), a cooling of 1~3 ?C, some earlier thawed permafrost was refrozen or attached, and the SLP invaded southwards to 46?N;(4) the Little Ice Age(LIA, 500 to 100–150 a), the latest cold period with significant permafrost expansion; and(5) climate warming since the last century, during which Northeast China has undergone extensive permafrost degradation. The frequent and substantial expansions and retreats of permafrost have greatly impacted cold-region environments in Northeast China. North of the SLP during the HMP, or in the present continuous permafrost zone, the existing permafrost was largely formed during the LG and was later overlapped by the permafrost formed in the Neoglaciation. To the south, it was formed in the Neoglaciation. However, many aspects of permafrost evolution still await further investigations, such as data integration, numerical reconstruction, and merging of Chinese permafrost history with those of bordering regions as well as collaboration with related disciplines. Of these, studieson the evolution and degradation of permafrost during the past 150 years and its hydrological, ecological, and environmental impacts should be prioritized. | HuiJun Jin XiaoLi Chang DongLiang Luo RuiXia He LanZhi Lu SiZhong Yang DongXin Guo XueMei Chen Stuart A.Harris | 2016 | Research in Cold and Arid Regions2016，8，4： | 3 |
| 19 | Influence of deformation on the corrosion behavior of LZ91 Mg-Li alloy显示文摘The effect of rolling and forging on the microstructure and corrosion behavior of LZ91 alloy was investigated using an electron probe micro-analyzer,immersion and electrochemical tests.Results showed that the area fraction of theβ-Li phase remained unchanged,and the grain size of theβ-Li phase decreased after forging.The as-rolled forged alloy(FR-LZ91)exhibited the highest area fraction of theβ-Li phase and the longest grains.The corrosion resistance of the forged LZ91 alloy increased due to grain refinement that prevented further corrosion during the immersion test.Among the experimental alloys,FR-LZ91 showed the highest resistance of corrosion film and charge transfer resistance values due to its protective film caused by the high area fraction of theβ-Li phase. | Xueqin Liu Xuejian Wang Enyu Guo Zongning Chen Huijun Kang Tongmin Wang | 2023 | International Journal of Minerals,Metallurgy and Materials2023，30，1： | 3 |
| 20 | Enhancing mechanical properties and corrosion resistance of nickel-aluminum bronze via hot rolling process显示文摘The mechanical properties and corrosion behavior of as-cast, as-annealed and hot-rolled nickelaluminum bronze(NAB) alloy(Cu-9 Al-10 Ni-4 Fe-1.2 Mn, all in wt.%) in 3.5 wt.% Na Cl solution were investigated. The results show that annealing introduces a large number of k phases to precipitate in the k phase. However, after further hot rolling, the original continuous k phases are spheroidized and dispersed, increasing the strength, hardness, and elongation of the alloy. In addition to the enhanced mechanical properties, the corrosion resistance of the NAB samples is also improved significantly by hot rolling, as revealed by the mass loss measurements, electrochemical impedance spectroscopy(EIS), and cross-sectional corrosion morphology. Selective phase corrosion occurs by the preferential corrosion of the k phase, which acts as an anode to the k phases, and the uncorroded k phases are retained in the corrosion product film. The interfaces between the k phases and the surrounding corrosion products become discontinuous caused by the spheroidization of k phases, reducing the corrosion of the substrate by the corrosive medium via the channels. As a result, the corrosion rate and the maximum local corrosion depth of the hot-rolled NAB sample are greatly reduced. | Yanhua Zeng Fenfen Yang Zongning Chen Enyu Guo Minqiang Gao Xuejian Wang Huijun Kang Tongmin Wang | 2021 | Journal of Materials Science & Technology2021，，2： | 3 |
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