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| 1 | Quantitative analysis of the dynamic change and spatial differences of the ecological security: a case study of Loess Plateau in northern Shaanxi Province显示文摘Using the theory and method of the ecological footprint, and combining the changes of regional land use, resource environment, population, society and economy, this paper calculated the ecological footprint, ecological carrying capacity and ecological surplus/loss in 1986-2002 on the Loess Plateau in northern Shaanxi Province. What is more, this paper has put forward the concept of ecological pressure index, set up ecological pressure index models, and ecological security grading systems, and the prediction models of different ecological footprints, ecological carrying capacity, ecological surplus and ecological safety change, and also has assessed the ecological footprint demands of 10,000 yuan GDP. The results of this study are as follows: (1) the ecological carrying capacity in northern Shaanxi shows a decreasing trend, the difference of reducing range is the fastest; (2) the ecological footprint appears an increasing trend; (3) ecological pressure index rose to 0.91 from 0.44 during 1986-2002 on the Loess Plateau of northern Shaanxi with an increase of 47%; and (4) the ecological security in the study area is in a critical state, and the ecological pressure index has been increasing rapidly. | LI Jing REN Zhiyuan ZHOU Zixiang | 2006 | Journal of Geographical Sciences2006，16，2： | 5 |
| 2 | Cold Stress-induced Glucosyltransferase CsUGT78A15 is Involved in the Formation of Eugenol Glucoside in Camellia sinensis显示文摘Eugenol is a natural phenolic compound known for its health-promoting properties and its ability to add a floral scent to tea plants.Plant eugenol glycosides have been identified and shown to make important contributions to fruit floral quality.However,the details of their biosynthesis and metabolism in tea plants are still unknown.Here,eugenol glucoside was unambiguously identified as a native metabolite in the tea plant,and its biosynthesis was shown to be induced by low temperature treatment.Through the analysis of UGTs induced by low temperature,the glycosyltransferase CsUGT78A15 was identified in tea,and its encoded protein was shown to catalyze the glucosylation of eugenol.Vmax/Km ratios showed that eugenol was the most suitable substrate for CsUGT78A15.Sugar donor preference analysis showed that CsUGT78A15 had a higher selectivity for glucose,followed by galactose and glucuronic acid.The expression of CsUGT78A15was correlatedwith the accumulation of eugenol glucoside in different tissues and genotypes of tea.Down-regulation of CsUGT78A15 led to a decreased eugenol glucoside content under cold stress,indicating that CsUGT78A15 plays an important role in the biosynthesis of eugenol glucoside under cold stress.The identification of eugenol glucoside in the tea plant and the discovery of a cold stress-induced eugenol glucosyltransferase in tea provide the foundation for the improvement of tea flavor under cold stress and the biotechnological production of eugenol glucoside. | Mingyue Zhao Binbin Cai Jieyang Jin Na Zhang Tingting Jing Jingming Wang Yuting Pan Zixiang Zhou Yifan Zhao Yingying Feng Feng Yu Mengting Zhang Yating Li Zhonghua Liu Chuankui Song | 2020 | Horticultural Plant Journal2020，6，6： | 4 |
| 3 | 在碳隐遁,土壤保留和水之间的交易在中国的 Guanzhong-Tianshui 经济区域让步显示文摘自然生态系统向人的社会提供很重要的产品和服务。随人口和自然资源的在利用上的快速的增加,人不断地在损坏其它的情况下正在提高一些服务的生产。这份报纸在中国的 Guanzhong-Tianshui 经济区域在生态系统服务,和在这些服务之间的关系估计变化。这些生态系统变化具有到这个经济区域的持续发展的大意义。生产可能性边疆(PPF ) 的概念被使用评估在碳隐遁,水收益和土壤保留之间的交易和协同作用。三陆地使用策略计划情形,使用评估潜力的利用和保护在生态系统服务变化。这研究表明在碳隐遁,土壤保留和水之间的显著交易让步,与在碳隐遁和土壤保留之间的协同作用。在在三种情形的碳隐遁,水收益和土壤保留之间有协同作用。保护情形是为调整生态系统服务能力的最赞成的陆地使用策略。这种情形导致最高的碳隐遁,水收益和土壤保留。结果能有含意因为计划的自然资本和生态系统服务,管理和土地使用决策。 | YANG Xiaonan ZHOU Zixiang LI Jing FU Xin MU Xingmin LI Ting | 2016 | Journal of Geographical Sciences2016，26，10： | 3 |
| 4 | Ecosystem Serviees and Their Valnes: A Case Study in Qinba Mountains of China 显示文摘 | Jing Li Zhiyuan Ren Zixiang Zhou | 2006 | Ecological Research2006，，： | 1 |
| 5 | Unveiling the impact of residual Li conversion and cation ordering on electrochemical performance of Co-free Ni-rich cathodes显示文摘The residual Li and Li^(+)/Ni_(2)+cation mixing play essential roles in the electrochemical properties of Ni-rich cathodes.However,a general relationship between the residual Li conversion,cation mixing,and their effects on the Li^(+)kinetics and structural stability has yet to be established,due to the presence of cobalt in the cathode.Here,we explore the synergistic impact of the residual Li conversion and cation ordering on a Co-free Ni-rich cathode(i.e.,LiNi0.95Mn0.05O_(2)).It discloses that the rate capability is mainly affected by residual Li contents and operating voltage.Specifically,residual Li can be electrochemically converted to cathode electrolyte interphase(CEI)below 4.3 V,thus inducing high interphase resistance,and decomposes to produce CO_(2)-dominated gas at 4.5 V,causing temporary enhancement of Li^(+)diffusivity but severe surface degradation during cycling.Moreover,the cycling performance of Co-free Ni-rich cathode is not only determined by Li^(+)/Ni_(2)+cation-ordered superlattice,which enhances the structural stability as it functions as the pillar to impede lattice collapse at a highly charged state,but also by the robust CEI layers which protect the bulk from electrolyte attack under 4.3 V.These findings promote an in-depth understanding of residual Li conversion and Li^(+)/Ni_(2)+cation ordering on Co-free Ni-rich cathode. | Chu Wang Lei Tan Hongling Yi Zixiang Zhao Xiaoli Yi Youyuan Zhou Junchao Zheng Jiexi Wang Lingjun Li | 2022 | Nano Research2022，15，10： | 1 |
| 6 | Dynamic targets searching assistance based on virtual camera priority显示文摘Background When a user walks freely in an unknown virtual scene and searches for multiple dynamic targets,the lack of a comprehensive understanding of the environment may have a negative impact on the execution of virtual reality tasks.Previous studies can help users with auxiliary tools,such as top view maps or trails,and exploration guidance,for example,automatically generated paths according to the user location and important static spots in virtual scenes.However,in some virtual reality applications,when the scene has complex occlusions,and the user cannot obtain any real-time position information of the dynamic target,the above assistance cannot help the user complete the task more effectively.Methods We design a virtual camera priority-based assistance to help the user search dynamic targets efficiently.Instead of forcing users to go to destinations,we provide an optimized instant path to guide them to places where they are more likely to find dynamic targets when they ask for help.We assume that a certain number of virtual cameras are fixed in virtual scenes to obtain extra depth maps,which capture the depth information of the scene and the locations of the dynamic targets.Our method automatically analyzes the priority of these virtual cameras,chooses the destination,and generates an instant path to assist the user in finding the dynamic targets.Our method is suitable for various virtual reality applications that do not require manual supervision or input.Results A user study is designed to evaluate the proposed method.The results indicate that compared with three conventional navigation methods,such as the top-view method,our method can help users find dynamic targets more efficiently.The advantages include reducing the task completion time,reducing the number of resets,increasing the average distance between resets,and reducing user task load.Conclusions We presented a method for improving dynamic target searching efficiency in virtual scenes by virtual camera priority-based path guidance.Compared with three conventional navigation methods,such as the top-view method,this method can help users find dynamic targets more effectively. | Zixiang ZHAO Quanwei ZHOU Xiaoguang HAN Lili WANG | 2021 | Virtual Reality & Intelligent Hardware2021，3，6： | 0 |
| 7 | Influence of varied drought types on soil conservation service within the framework of climate change:insights from the Jinghe River Basin,China显示文摘Severe soil erosion and drought are the two main factors affecting the ecological security of the Loess Plateau,China.Investigating the influence of drought on soil conservation service is of great importance to regional environmental protection and sustainable development.However,there is little research on the coupling relationship between them.In this study,focusing on the Jinghe River Basin,China as a case study,we conducted a quantitative evaluation on meteorological,hydrological,and agricultural droughts(represented by the Standardized Precipitation Index(SPI),Standardized Runoff Index(SRI),and Standardized Soil Moisture Index(SSMI),respectively)using the Variable Infiltration Capacity(VIC)model,and quantified the soil conservation service using the Revised Universal Soil Loss Equation(RUSLE)in the historical period(2000-2019)and future period(2026-2060)under two Representative Concentration Pathways(RCPs)(RCP4.5 and RCP8.5).We further examined the influence of the three types of drought on soil conservation service at annual and seasonal scales.The NASA Earth Exchange Global Daily Downscaled Projections(NEX-GDDP)dataset was used to predict and model the hydrometeorological elements in the future period under the RCP4.5 and RCP8.5 scenarios.The results showed that in the historical period,annual-scale meteorological drought exhibited the highest intensity,while seasonal-scale drought was generally weakest in autumn and most severe in summer.Drought intensity of all three types of drought will increase over the next 40 years,with a greater increase under the RCP4.5 scenario than under the RCP8.5 scenario.Furthermore,the intra-annual variation in the drought intensity of the three types of drought becomes smaller under the two future scenarios relative to the historical period(2000-2019).Soil conservation service exhibits a distribution pattern characterized by high levels in the southwest and southeast and lower levels in the north,and this pattern has remained consistent both in the historical and future periods.Over the past 20 years,the intra-annual variation indicated peak soil conservation service in summer and lowest level in winter;the total soil conservation of the Jinghe River Basin displayed an upward trend,with the total soil conservation in 2019 being 1.14 times higher than that in 2000.The most substantial impact on soil conservation service arises from annual-scale meteorological drought,which remains consistent both in the historical and future periods.Additionally,at the seasonal scale,meteorological drought exerts the highest influence on soil conservation service in winter and autumn,particularly under the RCP4.5 and RCP8.5 scenarios.Compared to the historical period,the soil conservation service in the Jinghe River Basin will be significantly more affected by drought in the future period in terms of both the affected area and the magnitude of impact.This study conducted beneficial attempts to evaluate and predict the dynamic characteristics of watershed drought and soil conservation service,as well as the response of soil conservation service to different types of drought.Clarifying the interrelationship between the two is the foundation for achieving sustainable development in a relatively arid and severely eroded area such as the Jinghe River Basin. | BAI Jizhou LI Jing RAN Hui ZHOU Zixiang DANG Hui ZHANG Cheng YU Yuyang | 2024 | Journal of Arid Land2024，16，2： | 0 |
| 8 | Progress and future prospects of decadal prediction and data assimilation:A review显示文摘年代际预测,也称为“近期气候预测”,旨在预测未来1-10年内的气候变化,是气候预测和气候变化研究领域的一个新关注点.它位于季节至年际预测和长期气候变化预测之间,结合了初值问题和外部强迫问题的两个方面.年代际预测的核心技术在于用于模式初始化的同化方法的准确性和效率,其目标是为模式提供准确的初始条件,其中包含观测到的气候系统内部变率,年代际预测的初始化通常涉及在耦合框架内同化海洋观测,其中观测到的信号通过耦合过程传递到其他分量,如大气和海冰.然而,最近的研究越来越关注在海洋-大气耦合模式中探索耦合数据同化(CDA),有人认为CDA有潜力显著提高年代际预测技巧.本文综合评述了该领域的三个方面的研究现状:初始化方法,年代际气候预测的可预测性和预测技巧,以及年代际预测的未来发展和挑战. | Wen Zhou Jinxiao Li Zixiang Yan Zili Shen Bo Wu Bin Wang Ronghua Zhang Zhijin Li | 2024 | Atmospheric and Oceanic Science Letters2024，17，1： | 0 |
| 9 | Numerical Computation of High Dimensional Solitons Via Darboux Transformation显示文摘Darboux transformation gives explicit soliton solutionsof nonlinear partial differential equations. Using numerical computation in each step of constructing Darboux transformation,one can get the graphs of the solitons practically.Inndimensions(n 3) , this method greatly increases the speed and deduces the memory usage of computation comparing to the software for algebraic computation. A technical problem concerning floating overflow is discussed. | Zixiang ZHOU (Institute of Mathematics,Fudan University,Shanghai 2 0 0 433,China) E- mail:zxzhou@guomai.sh.cn | 1997 | Communications in Nonlinear Science and Numerical Simulation1997，2，4： | 0 |
| 10 | PARAMETERS OF DARBOUX TRANSFORMATION FOR REDUCED AKNS,KAUP-NEWELL AND PCF SYSTEMS显示文摘FOr the integrable system with u(p, q) reduction, there is a well-known sufficient conditionto choose the parameters: the spectral parameters only take two mutually conjugate valuesand the solutions of the Lax pair should satisfy certain orthogonal relations. In this paper, theauthor proves that, for the AKNS system, the Kaup-Newed system and the principal chiralfield (PCF), this condition is also necessary for generic potentials with the u(p, q) reduction.FOr some other reductions, sufficiency and necessity of more constraints are proved. | ZHOU ZIXIANG(Institute of Mathematics, Fudan University, Shanghai 200433) | 1999 | Chinese Annals of Mathematics,Series B1999，20，2： | 0 |
| 11 | Darboux Transformation and Exact Solutions for Two Dimensional A_(2n-1)^((2)) Toda Equations显示文摘The Darboux transformation for the two dimensional A_(2n-1)^((2))Toda equations is constructed so that it preserves all the symmetries of the corresponding Lax pair.The expression of exact solutions of the equation is obtained by using Darboux transformation. | Zixiang ZHOU | 2022 | Chinese Annals of Mathematics,Series B2022，43，5： | 0 |
| 12 | A lysosomal polarity-specific two-photon fluorescent probe for visualization of autophagy显示文摘Autophagy plays a vital role in maintaining the balance of normal physiological state of living cells.In this paper,a polarity-specific two-phot on fluorescent probe Lyso-NA based on naphthalimide was synthesized for the purpose of monitoring autophagy during biological research.The results of photophysical properties and theoretical calculation con firmed that different polarities of solvents mainly effected fluorescent intensities of probe.Fluoresce nt intensity,quantum yield and fluorescence lifetime of probe kept a good linear relationship with polarity respectively.In addition,due to its low toxicity and selective accumulation in lysosomes,Lyso-NA is suitable for detecting changes in lysosomal polarity of living cells.Compare with the imaging results of plasmid transfection,a better performed realtime long-term fluoresce nt visualization of autophagy in living cells was achieved.Probe Lyso-NA can work as an efficient and cost effective imaging tool for visualizing autophagy in living cells. | Zixiang Yuan Jun Chen Qin Zhou Ao Liu Zeming Qiang Min Fang Man Chen Yan Feng Haizhu Yu Xiuli Yang Xiangming Meng | 2021 | Chinese Chemical Letters2021，32，5： | 0 |
| 13 | Carbon payments in the Guanzhong–Tianshui region to control land degradation显示文摘Carbon trading and carbon offset markets are potential policy options for mitigating greenhouse gas emissions and climate change. A price on carbon is expected to generate demand for carbon offsets. In a market-based framework, the carbon price should be high enough to compensate for opportunity costs. We studied a highly-modified agricultural system in the Guanzhong–Tianshui economic region of China that is typical of many temperate agricultural zones in western China. We quantified the economic returns from agriculture and from carbon plantings(both monoculture and ecological plantings) under five carbon-price scenarios. The mean carbon sequestration is 34 Mg·hm^(–2)·a^(–1), and the average annual payment increased to 1146 CNY·hm^(–2) at a medium carbon price of 50 CNY·Mg^(–1) CO_2^(–e). Thus, areas of high priority for conservation and restoration may be restored relatively cheaply in the presence of a carbon market.Overall, however, less carbon is sequestered by ecological plantings(i.e., mixed native trees and shrubs) compared to agriculture. | Zixiang ZHOU Yufeng ZOU | 2017 | Frontiers of Agricultural Science and Engineering2017，4，2： | 0 |
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