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1Spatial and temporal change patterns of net primary productivity and its response to climate change in the Qinghai–Tibet Plateau of China from 2000 to 2015显示文摘The vegetation ecosystem of the Qinghai–Tibet Plateau in China,considered to be the′′natural laboratory′′of climate change in the world,has undergone profound changes under the stress of global change.Herein,we analyzed and discussed the spatial-temporal change patterns and the driving mechanisms of net primary productivity(NPP)in the Qinghai–Tibet Plateau from 2000 to 2015 based on the gravity center and correlation coefficient models.Subsequently,we quantitatively distinguished the relative effects of climate change(such as precipitation,temperature and evapotranspiration)and human activities(such as grazing and ecological construction)on the NPP changes using scenario analysis and Miami model based on the MOD17A3 and meteorological data.The average annual NPP in the Qinghai–Tibet Plateau showed a decreasing trend from the southeast to the northwest during 2000–2015.With respect to the inter-annual changes,the average annual NPP exhibited a fluctuating upward trend from 2000 to 2015,with a steep increase observed in 2005 and a high fluctuation observed from 2005 to 2015.In the Qinghai–Tibet Plateau,the regions with the increase in NPP(change rate higher than 10%)were mainly concentrated in the Three-River Source Region,the northern Hengduan Mountains,the middle and lower reaches of the Yarlung Zangbo River,and the eastern parts of the North Tibet Plateau,whereas the regions with the decrease in NPP(change rate lower than–10%)were mainly concentrated in the upper reaches of the Yarlung Zangbo River and the Ali Plateau.The gravity center of NPP in the Qinghai–Tibet Plateau has moved southwestward during 2000–2015,indicating that the increment and growth rate of NPP in the southwestern part is greater than those of NPP in the northeastern part.Further,a significant correlation was observed between NPP and climate factors in the Qinghai–Tibet Plateau.The regions exhibiting a significant correlation between NPP and precipitation were mainly located in the central and eastern Qinghai–Tibet Plateau,and the regions exhibiting a significant correlation between NPP and temperature were mainly located in the southern and eastern Qinghai–Tibet Plateau.Furthermore,the relative effects of climate change and human activities on the NPP changes in the Qinghai–Tibet Plateau exhibited significant spatial differences in three types of zones,i.e.,the climate change-dominant zone,the human activity-dominant zone,and the climate change and human activity interaction zone.These research results can provide theoretical and methodological supports to reveal the driving mechanisms of the regional ecosystems to the global change in the Qinghai–Tibet Plateau.GUO Bing ZANG Wenqian YANG Fei HAN Baomin CHEN Shuting LIU Yue YANG Xiao HE Tianli CHEN Xi LIU Chunting GONG Rui 2020Journal of Arid Land2020,12,1:12
2Curcumin potentiates the antitumor effects of 5-FU in treatment of esophageal squamous carcinoma cells through downregulating the activation of NF-κB signaling pathway in vitro and in vivo显示文摘尽管表明小径的原子 factor-kappaB (NF-B ) 的组成的激活在多重不同人的肿瘤被报导了,在食道的有鳞的房间癌(ESCC ) 的 NF-B 小径的角色留下不清楚。丰富的来源提供了有趣的卓见进化疗和 chemopreventive 在癌症上完成的 curcumin 可以由调停的多重机制。在这研究,我们首先在二 ESCC 房间线 Eca109 和 EC9706 分析了 NF-B 小径的地位,然后进一步调查了 curcumin 是否能独自或在有 5 氟尿嘧啶(5-FU ) 的联合在 vitro 并且在 vivo 调制 NF-B 小径。结果证明 NF-B 发信号小径组成地在 ESCC 房间线被激活。Curcumin 经由 IB phosphorylation,和 downregulated 的抑制压制了 NF-B 的激活在 ESCC 房间线的 Bcl-2 和 CyclinD1 的表情。与 5-FU 相结合的 Curcumin 比独自对待的 5-FU 导致了更低的房间生存能力和更高的 apoptosis。在一个人的 ESCC 异种皮移植模型, curcumin 或 5-FU 独自减少了肿瘤体积,但是他们的联合有最强壮的 anticancer 效果。而且, curcumin 能也禁止在 vivo 通过 IB phosphorylation 和房间 apoptosis 的正式就职的 downregulation 表明小径的 NF-B。总的来说,我们的结果显示组成地激活的 NF-B 发信号小径在二个 ESCC 房间存在, curcumin 的 chemopreventive 效果与表明小径和它的下游的基因的 NF-B 的 downregulation 被联系。Fang Tian Tianli Fan Yan Zhang Yanan Jiang Xiaoyan Zhang 2012Acta Biochimica et Biophysica Sinica2012,44,10:10
3When will China achieve its carbon emission peak?显示文摘Global warming is primarily attributed to the significant increase in atmospheric CO2 concentration,which is caused mainly by carbon emissions generated from fossil fuel combustion[1].Efficient measures are required to control these emissions and reduce global warming.Tianli Zheng Jiangling Zhu Shaopeng Wang Jingyun Fang 2016National Science Review2016,3,1:9
4DPTM simulation of aeolian sand ripple显示文摘Aeolian sand ripple and its time evolution are simulated by the discrete particle tracing method (DPTM) presented in this paper. The difference between this method and the current methods is that the former can consider the three main factors relevant to the formation of natural aeolian sand ripples,which are the wind-blown sand flux above the sand bed formed by lots of sand particles with different di-ameters,the particle-bed collision and after it the rebound and ejection of sand particles in the sand bed,the saltation of high-speed sand particles and the creep of low-speed sand particles,respectively. The simulated aeolian sand ripple is close to the natural sand ripple not only in basic shape and characteristic,particle size segregation and stratigraphy,but also in formation stages. In addition,three important speeds can be obtained by this method,which are the propagation speed of the saturated aeolian sand ripple and the critical frictional wind speeds of emergence and disappearance of sand ripple.ZHENG XiaoJing BO TianLi XIE Li 2008Science China(Physics,Mechanics & Astronomy)2008,51,3:7
5Selective removal of heavy metal ions in aqueous solutions by sulfide-selector intercalated layered double hydroxide adsorbent显示文摘Remaining largely under-appreciated, a majority of metal ion sorbents are limited in their target selectivity. In this work, a 3D sulfide intercalated NiFe-layered double hydroxide (NFL-S) hierarchical sorbent has been synthesized for selective heavy metal removal. The intercalation of sulfurated groups in the interlayer of the layered double hydroxide (LDH) nanosheets endows NFL-S as a selective heavy metal ion filter;the selectivity of NFL-S for heavy metals is in the order of Pb^2+> Cu^2+≥ Zn^2+> Cd^2+> Mn^2+, and NFL-S has high kd values for Pb2+(~10^6 mL/g) and Cu2+(~10^5 mL/g). Scanning electron microscopy. X-ray photoelectron spectroscopy and powder X-ray diffraction were used to analyze the composition of the as-prepared nanoadsorbent. The selective adsorption behavior was systematically studied using batch experiments, and the performance was evaluated through kinetic and isotherm studies. Moreover, the adsorption mechanism of heavy metals by NFL-S through surface complexation was also investigated, which shows great potential for water decontamination.Jing Wang Liang Zhang Tianshu Zhang Ting Du Tao Li Tianli Yue Zhonghong Li Jianlong Wang 2019Journal of Materials Science & Technology2019,35,9:5
6Rational design of phosphorus-doped cobalt sulfides electrocatalysts for hydrogen evolution显示文摘Moderate anionic doping is an effective approach to improve the performance of electrocatalysts toward hydrogen evolution reaction(HER)since it can adjust the electronic structure,activesite,and phase.The reported studies mainly focus on designing P doped C0S2,while otherphases of cobalt sulfide,such as Co1-xS and Co9S8 doped with P are rarely investigated for HER electrocatalysts.Herein,various cobalt sulfides(including CoSg/Co1-xS,Co1-xS,and Co9S8)doped with P are anchored on carbon cloth through a facile hydrothermal method.Among tested electrocatalysts,P doped Co1-xS exhibits excellent electrocatalytic performance with an overpotential of 110 and 165 mV(vs.RHE)for currentdensities of 10 and 100 mA·cm^-2,respectively.Density functional theory calculations reveal that P doped Co1-xS possesses a smaller bandgapand more optimal hydrogen adsorption sites than pristine Co1-xS.This work initially investigates various cobalt sulfides doped with P and furthergets in sight into the activity improvement mechanism of P dopi ng,which could guide the desig n of earth-abunda nt HER electrocatalysts for the'hydrogen economy'.Guoxing Qu Tianli Wu Yanan Yu Zekang Wang Yang Zhou Zhendong Tang Qin Yue 2019Nano Research2019,12,12:5
7Subwavelength imaging and detection using adjustable and movable droplet microlenses显示文摘We developed adjustable and movable droplet microlenses consisting of a liquid with a high refractive index.The microlenses were prepared via ultrasonic shaking in deionized water,and the diameter of the microlenses ranged from 1 to 50μm.By stretching the microlenses,the focal length can be adjusted from 13 to 25μm.With the assistance of an optical tweezer,controllable assembly and movement of microlens arrays were also realized.The results showed that an imaging system combined with droplet microlenses could image 80 nm beads under white light illumination.Using the droplet microlenses,fluorescence emission at 550 nm from Cd Se@Zn S quantum dots was efficiently excited and collected.Moreover,Raman scattering signals from a silicon wafer were enhanced by^19 times.The presented droplet microlenses may offer new opportunities for flexible liquid devices in subwavelength imaging and detection.XIXI CHEN TIANLI WU ZHIYONG GONG YUCHAO LI YAO ZHANG BAOJUN LI 2020Photonics Research2020,8,3:5
8Allergic diseases, immunoglobulin E, and autoimmune pancreatitis: a retrospective study of 22 patients显示文摘Guo Limei Huang Yonghui Wang Tianli Shi Xueying Chang Hong Yao Wei Huang Xuebiao 2014Chinese Medical Journal2014,,23:5
9Deer Body Adaptive Threshold Segmentation Algorithm Based on Color Space显示文摘In large-scale deer farming image analysis,K-means or maximum between-class variance(Otsu)algorithms can be used to distinguish the deer from the background.However,in an actual breeding environment,the barbed wire or chain-link fencing has a certain isolating effect on the deer which greatly interferes with the identification of the individual deer.Also,when the target and background grey values are similar,the multiple background targets cannot be completely separated.To better identify the posture and behaviour of deer in a deer shed,we used digital image processing to separate the deer from the background.To address the problems mentioned above,this paper proposes an adaptive threshold segmentation algorithm based on color space.First,the original image is pre-processed and optimized.On this basis,the data are enhanced and contrasted.Next,color space is used to extract the several backgrounds through various color channels,then the adaptive space segmentation of the extracted part of the color space is performed.Based on the segmentation effect of the traditional Otsu algorithm,we designed a comparative experiment that divided the four postures of turning,getting up,lying,and standing,and successfully separated multiple target deer from the background.Experimental results show that compared with K-means,Otsu and hue saturation value(HSV)+K-means,this method is better in performance and accuracy for adaptive segmentation of deer in artificial breeding scenes and can be used to separate artificially cultivated deer from their backgrounds.Both the subjective and objective aspects achieved good segmentation results.This article lays a foundation for the effective identification of abnormal behaviour in sika deer.Yuheng Sun Ye Mu Qin Feng Tianli Hu He Gong Shijun Li Jing Zhou 2020Computers, Materials & Continua2020,,8:5
10The selection of a primary marker for the Anthropocene显示文摘Since Homo sapiens appeared,the planet has experienced continuing environmental changes[1,2].In 2000,Crutzen and Stoermer[3]systematically analysed the global changes caused by human activity over the previous 300 years and suggested that the Holocene epoch ended in the 1750s and a new geological age,the Anthropocene,began.Afterwards,the Anthropocene drew a lot of attention from both scientific community and the general public.The recognition and placement of the Anthropocene/Holocene boundary has been a subject of heated debates over the past two decades.At the 35th International Geological Congress(2016;IGC),the Anthropocene Working Group(AWG)recommended the Anthropocene to be formalised with an epoch rank,with the 1950s as its lower boundary[4].Tianli Wang Liangcheng Tan Hai Xu Jingjie Zang Dong Li Jianghu Lan Yongming Han Li Li 2019Science Bulletin2019,64,22:4
11Nonplanar post-buckling analysis of simply supported pipes conveying fluid with an axially sliding downstream end显示文摘In this study,the nonplanar post-buckling behavior of a simply supported fluid-conveying pipe with an axially sliding downstream end is investigated within the framework of a three-dimensional(3 D)theoretical model.The complete nonlinear governing equations are discretized via Galerkin’s method and then numerically solved by the use of a fourth-order Runge-Kutta integration algorithm.Different initial conditions are chosen for calculations to show the nonplanar buckling characteristics of the pipe in two perpendicular lateral directions.A detailed parametric analysis is performed in order to study the influence of several key system parameters such as the mass ratio,the flow velocity,and the gravity parameter on the post-buckling behavior of the pipe.Typical results are presented in the form of bifurcation diagrams when the flow velocity is selected as the variable parameter.It is found that the pipe will stay at its original straight equilibrium position until the critical flow velocity is reached.Just beyond the critical flow velocity,the pipe would lose stability by static divergence via a pitchfork bifurcation,and two possible nonzero equilibrium positions are generated.It is shown that the buckling and post-buckling behaviors of the pipe cannot be influenced by the mass ratio parameter.Unlike a pipe with two immovable ends,however,the pinned-pinned pipe with an axially sliding downstream end shows some different features regarding post-buckling behaviors.The most important feature is that the buckling amplitude of the pipe with an axially sliding downstream end would increase first and then decrease with the increase in the flow velocity.In addition,the buckled shapes of the pipe varying with the flow velocity are displayed in order to further show the new post-buckling features of the pipe with an axially sliding downstream end.Tianli JIANG Huliang DAI Kun ZHOU Lin WANG 2020Applied Mathematics and Mechanics(English Edition)2020,41,1:3
12Numerical Investigation on the Initiation Mechanism of Debris-Flow under Rainfall显示文摘Rainfall is an important factor to trigger the debris flow.Numerical simulation on the responses of slopes and the initiation of debris flow under rainfall was processed by using the software FLAC2D based on the soil parameters in Weijia Gully,Beichuan County,Sichuan Province,China.The effects of the slope angle,rainfall intensity,soil parameters on the developments of the stress and pore pressure and deformation of the slope were studied.It indicates that large displacements of the slope are mainly located near the slope toe.With the increase of the rainfall intensity the stability of the slope decreases and so the debris-flow is easy to occur.LU Xiaobing YE Tianli CUI Peng HU Kaiheng CHEN Xiaoqing 2011Journal of Mountain Science2011,8,4:3
13Late Holocene hydroclimatic variations and possible forcing mechanisms over the eastern Central Asia显示文摘Hydroclimatic variations over the eastern Central Asia are highly sensitive to changes in hemispheric-scale atmospheric circulation systems. To fully understand the long-term variability and relationship between hydroclimate and atmospheric circulation system, we present a high-resolution lascustrine record of late Holocene hydroclimate from Lake Sayram, Central Tianshan Mountains, China, based on the total organic carbon, total nitrogen, and carbonate contents, carbon/nitrogen ratios, and grain size. Our results reveal four periods of substantially increased precipitation at the interval of 4000–3780, 3590–3210, 2800–2160, and 890–280 cal yr BP, and one period of slightly increased precipitation from 1700–1370 cal yr BP. These wetter periods broadly coincide with those identified in other records from the mid-latitude Westerlies-dominated eastern Central Asia, including the northern Tibetan Plateau. As such, a similar hydroclimatic pattern existed over this entire region during the late Holocene. Based on a close similarity of our record with reconstruction of North Atlantic Oscillation indices and solar irradiance, we propose that decreased solar irradiance and southern migration of the entire circum-North Atlantic circulation system, particularly the main pathway of the mid-latitude Westerlies, significantly influenced hydroclimate in eastern Central Asia during the late Holocene. Finally, the inferred precipitation at Lake Sayram has increased markedly over the past 100 years, although this potential future changes in hydroclimate in Central Asia need for further investigation.Jianghu LAN Hai XU Keke YU Enguo SHENG Kangen ZHOU Tianli WANG YuANDa YE Dongna YAN Huixian WU Peng CHENG Waili ABULIEZI Liangcheng TAN 2019Science China Earth Sciences2019,62,8:3
14Parametrization of woods-saxon potential for heavy-ion systems显示文摘Several elastic scattering angular distributions of ^(12)C from target nuclei of A ≥39 are analyzed to extract the Woods-Saxon potential parameters with the fixed imaginary potential and Coulomb radius parameters.Using the best fitted diffuseness parameters,the correlations of the real part parameters with A_1^(1/3)+ A_2^(1/3) and incident energy are revealed, and the systematic Woods-Saxon potential parameters are presented for nucleus-nucleus interaction.The proposed potential parameters can reproduce not only the elastic scattering angular distributions induced by ^(12)C,but also many elastic scattering angular distributions induced by the projectiles other than ^(12)C,thus providing important inputs for the study of nuclear reactions of heavy-ion systems.Lin Gan ZhiHong Li HuiBin Sun DanYang Pang Bing Guo YunJu Li Jun Su ShengQuan Yan ErTao Li YouBao Wang Gang Lian ZhiYu Han XinYue Li DongHui Li TianLi Ma ChangJin Pei YangPing Shen Yi Su Sheng Zeng Yong Zhou WeiPing Liu 2017Science China(Physics,Mechanics & Astronomy)2017,60,8:2
15Survey of patulin in apple juice concentrates in Shaanxi (China) and its dietary intake显示文摘Yaodong Guo Zhengkun Zhou Yahong Yuan Tianli Yue 2013Food Control2013,,2:2
16Tumor organoids:synergistic applications,current challenges,and future prospects in cancer therapy显示文摘Patient-derived cancer cells(PDCs)and patient-derived xenografts(PDXs)are often used as tumor models,but have many shortcomings.PDCs not only lack diversity in terms of cell type,spatial organization,and microenvironment but also have adverse effects in stem cell cultures,whereas PDX are expensive with a low transplantation success rate and require a long culture time.In recent years,advances in three-dimensional(3D)organoid culture technology have led to the development of novel physiological systems that model the tissues of origin more precisely than traditional culture methods.Patient-derived cancer organoids bridge the conventional gaps in PDC and PDX models and closely reflect the pathophysiological features of natural tumorigenesis and metastasis,and have led to new patient-specific drug screening techniques,development of individualized treatment regimens,and discovery of prognostic biomarkers and mechanisms of resistance.Synergistic combinations of cancer organoids with other technologies,for example,organ-on-a-chip,3D bio-printing,and CRISPR-Cas9-mediated homology-independent organoid transgenesis,and with treatments, such as immunotherapy, have been useful in overcoming their limitations and led to the development of more suitable model systems that recapitulate the complex stroma of cancer, inter-organ and intra-organ communications,and potentially multiorgan metastasis. In this review, we discuss various methods for the creation of organ-specific cancer organoids and summarize organspecific advances and applications, synergistic technologies, and treatments aswell as current limitations and future prospects for cancer organoids. Furtheradvances will bring this novel 3D organoid culture technique closer to clinicalpractice in the future.Jingjing Qu Farhin Shaheed Kalyani Li Liu Tianli Cheng Lijun Chen 2021Cancer Communications2021,41,12:2
17Grain boundary optimization induced substantial squareness enhancement and high performance in iron-rich Sm-Co-Fe-Cu-Zr magnets显示文摘Increasing iron content has been witnessed an essential method to improve the remanence of 2:17-type Sm-Co-Fe-Cu-Zr magnets,however,the inferior squareness factor accompanied with the increased iron content turns into a neck sticking problem.In this work,the grain boundary optimization induced substantial squareness enhancement from 63.4%to 91.4%,and consequently an excellent maximum energy product of 32.63 MGOe have been achieved in iron-rich Sm-Co-Fe-Cu-Zr magnets via tuning solution process.It is clearly revealed that the grain boundary(GB)phases as well as the micro-twins’density in grain interiors can be controlled and interprets the enhancement mechanism of squareness.Jun Cao Tianli Zhang Jinghua Liu Hao Xu Mingyao Hu Wei Xia Ao Wang Hui Wang Chengbao Jiang 2021Journal of Materials Science & Technology2021,,26:2
18Optimization of microwave-assisted extraction of polyphenols from apple pomace using response surface methodology and HPLC analysis显示文摘Bai Xuelian Yue Tianli Yuan Yahong 2010Jonrnal of separation science2010,33,2324:1
19Prevalence of Salmonella on Raw Poultry at Retail Markets in China显示文摘Yang Baowei Xi Meili Wang Xin Cui Shenghui Yue Tianli Hao Hongshan Wang Yin Cui Yue Alali W Q Meng Jianghong Walls Isabel Wong D M Lo Fo Doyle M P 2011Journal of Food Protection2011,,10:1
20High thermoelectric properties with low thermal conductivity due to the porous structure induced by the dendritic branching in n-type PbS显示文摘PbS-based thermoelectric materials have attracted extensive attention in recent years for the advantages of earth abundancy and low cost,which is considered to be a substitute for traditional PbTe material.However,their high thermal conductivity restricts its development.Hence,in order to improve their thermoelectric performance from reducing the thermal conductivity,a kind of dendritic PbS with controlled crystal grain and morphology are obtained by solution synthesis.By adjusting the amount of surfactant(CTAB),the specific formation process of dendrites is regulated.After sintering,the dendritic PbS nanoparticles are easy to form porous structure due to the overlapping and staggered arrangement of dendritic branches.For comparison,we also prepare a kind of regular octahedral PbS and a dense packing arrangement is formed because of the integrity of the octahedral structure.DFT-based Boltzmann transport equation is used to prove the crucial role of porous structure in scattering phonon.Finally,a maximum zT=1.0 at 773 K in n-type PbS is obtained,which still keep a high-speed growth and is expected to get higher zT value in a higher temperature region.Our work may shed light to other thermoelectric materials from the formation of porous structure to reduce the thermal conductivity.Zhenyu Zhu Janak Tiwari Tianli Feng Zhan Shi Yue Lou Biao Xu 2022Nano Research2022,15,5:1
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