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| 1 | Synthesis, properties, and applications of graphene oxide/reduced graphene oxide and their nanocomposites显示文摘Thanks to their remarkable mechanical, electrical, thermal, and barrier properties, graphene-based nanocomposites have been a hot area of research in the past decade. Because of their simple top-down synthesis, graphene oxide (GO) and reduced graphene oxide (rGO) have opened new possibilities for gas barrier, membrane separation, and stimuli-response characteristics in nanocomposites. Herein, we review the synthesis techniques most commonly used to produce these graphene derivatives, discuss how synthesis affects their key material properties, and highlight some examples of nanocomposites with unique and impressive properties. We specifically highlight their performances in separation applications, stimuli-responsive materials, anti-corrosion coatings, and energy storage. Finally, we discuss the outlook and remaining challenges in the field of practical industrial-scale production and use of graphene-derivative-based polymer nanocomposites. | Andrew T. Smith Anna Marie LaChance Songshan Zeng Bin Liu Luyi Sun | 2019 | Nano Materials Science2019，1，1： | 33 |
| 2 | The existing time of Sihetun vertebrate in western Liao-ning,China——Evidence from U-Pb dating of zircon显示文摘In different opinions, the stratigraphic time of the feathered dinosaurs and early birds in Sihetun and its neighboring areas in Beipiao, western Liaoning is appointed to different epoches of eras, such as Late Jurassic, Early Cretaceous and Late Jurassic-Early Cretaceous. Even the recently dating data are still very different. This note first reported the U-Pb age of (125.2±0.9) Ma of zircon separated from tuff of Sihetun vertebrates horizon. The age reveals that Sihetun vertebrate belongs to Early Cretaceous. The method is more objective, because of the strong ability of disturbance resistance and high U-Pb blocking temperature of zircons. | WANG Songshan WANG Yuanqing HU Huaguang LI Huimin | 2001 | Chinese Science Bulletin2001，46，9： | 20 |
| 3 | Friction compensation for low velocity control of hydraulic flight motion simulator: A simple adaptive robust approach显示文摘Low-velocity tracking capability is a key performance of flight motion simulator (FMS), which is mainly affected by the nonlinear friction force. Though many compensation schemes with ad hoc friction models have been proposed, this paper deals with low-velocity control without friction model, since it is easy to be implemented in practice. Firstly, a nonlinear model of the FMS middle frame, which is driven by a hydraulic rotary actuator, is built. Noting that in the low velocity region, the unmodeled friction force is mainly characterized by a changing-slowly part, thus a simple adaptive law can be employed to learn this changing-slowly part and compensate it. To guarantee the boundedness of adaptation process, a discontinuous projection is utilized and then a robust scheme is proposed. The controller achieves a prescribed output tracking transient performance and final tracking accuracy in general while obtaining asymptotic output tracking in the absence of modeling errors. In addition, a saturated projection adaptive scheme is proposed to improve the globally learning capability when the velocity becomes large, which might make the previous proposed projection-based adaptive law be unstable. Theoretical and extensive experimental results are obtained to verify the high-performance nature of the proposed adaptive robust control strategy. | Yao Jianyong Jiao Zongxia Han Songshan | 2013 | Chinese Journal of Aeronautics2013，26，3： | 10 |
| 4 | Fabrication of asymmetric poly(m-phenylene isophthalamide)nanofiltration membrane for chromium(VI) removal显示文摘The feasibility of employing nanofiltration for the removal of chromium(VI) from wastewater was investigated. Poly (m-phenylene isophthalamide) (PMIA) was used to fabricate asymmetric nanofiltration membrane through the phase-inversion technique. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) were used to characterize the obtained membrane, and the both confirmed a much smoother surface which could reduce membrane fouling. The PMIA membrane showed different rejections to electrolytes in a sequence of Na2SO4 > MgSO4 > NaCl > MgCl2, which was similar to the sequence of the negatively charged nanofiltration membranes. Separation experiments on chromium(VI) solution were conducted at various operating conditions, such as feed concentration, applied pressure and pH. It is concluded that chromium(VI) could be effectively removed from chromiumcontaining wastewater by the PMIA nanofiltration membranes while maintaining their pollution resistance under alkaline condition. | Xiaojing Ren Changwei Zhao Songshan Du Tao Wang Zhaokun Luan Jun Wang Deyin Hou | 2010 | Journal of Environmental Sciences2010，22，9： | 9 |
| 5 | Fuzzy robust nonlinear control approach for electro-hydraulic flight motion simulator显示文摘A fuzzy robust nonlinear controller for hydraulic rotary actuators in flight motion simulators is proposed. Compared with other three-order models of hydraulic rotary actuators, the proposed controller based on first-order nonlinear model is more easily applied in practice, whose control law is relatively simple. It not only does not need high-order derivative of desired command,but also does not require the feedback signals of velocity, acceleration and jerk of hydraulic rotary actuators. Another advantage is that it does not rely on any information of friction, inertia force and external disturbing force/torque, which are always difficult to resolve in flight motion simulators. Due to the special composite vane seals of rectangular cross-section and goalpost shape used in hydraulic rotary actuators, the leakage model is more complicated than that of traditional linear hydraulic cylinders. Adaptive multi-input single-output(MISO) fuzzy compensators are introduced to estimate nonlinear uncertain functions about leakage and bulk modulus. Meanwhile, the decomposition of the uncertainties is used to reduce the total number of fuzzy rules. Different from other adaptive fuzzy compensators, a discontinuous projection mapping is employed to guarantee the estimation process to be bounded. Furthermore, with a sufficient number of fuzzy rules, the controller theoretically can guarantee asymptotic tracking performance in the presence of the above uncertainties, which is very important for high-accuracy tracking control of flight motion simulators.Comparative experimental results demonstrate the effectiveness of the proposed algorithm, which can guarantee transient performance and better final accurate tracking in the presence of uncertain nonlinearities and parametric uncertainties. | Han Songshan Jiao Zongxia Wang Chengwen Shang Yaoxing | 2015 | Chinese Journal of Aeronautics2015，28，1： | 7 |
| 6 | Geographic scenario:a possible foundation for further development of virtual geographic environments显示文摘It has been two decades since virtual geographic environments(VGEs)were initially proposed.While relevant theories and technologies are evolving,data organization models have always been the foundation of VGE development,and they require further exploration.Based on the comprehensive consideration of the characteristics of VGEs,geographic scene is proposed to organize geographic information and data.We empirically find that geographic scene provides a suitable organization schema to support geo-visualization,geo-simulation,and geo-collaboration.To systematically investigate the concept and method of geographic scene,Geographic Scenario is proposed as the theory on developing geographic scene,and corresponding key issues of the Geographic Scenario are illustrated in this article.Prospects of the proposed method are discussed with the hope of informing future studies of VGEs. | Guonian Lü Min Chen Linwang Yuan Liangchen Zhou Yongning Wen Mingguan Wu Bin Hu Zhaoyuan Yu Songshan Yue Yehua Sheng | 2018 | International Journal of Digital Earth2018，11，4： | 4 |
| 7 | Freestanding reduced graphene oxide/sodium vanadate composite films for flexible aqueous zinc-ion batteries显示文摘With the booming development of portable and wearable electronic devices, flexible energy storage devices have attracted great attention. Among various energy storage devices, aqueous zinc ion batteries(ZIBs) are one of the promising candidates due to their low cost, good safety, high energy and power densities. However, the conventional cathodes of aqueous ZIBs were often prepared by mixing active materials with binders and conductive additives and then coating them onto current collectors. The resultant cathodes often suffer from unsatisfied flexibility. Herein, we fabricated freestanding reduced graphene oxide/NaV_3O_8·1.5H_2O(RGO/NVO) composite films with interlinked multilayered architecture by a vacuum filtrating process. Such composite films exhibit excellent mechanical property and high electronic conductivity. Owing to unique architecture, they display a high capacity of 410 mA h g^(-1) and excellent cycling performance up to 2000 cycles with a high capacity retention of 94%. Moreover, RGO/NVO composite films can directly serve as the cathodes of flexible aqueous ZIBs. As a proof of concept,flexible ZIBs were assembled based on the composite films. Impressively, they exhibit stable performance at different bending states, demonstrating great potential application in flexible energy storage devices. | Fang Wan Xinyu Wang Songshan Bi Zhiqiang Niu Jun Chen | 2019 | Science China Chemistry2019，62，5： | 4 |
| 8 | Weak signal detection method based on Duffing oscillator with adjustable frequency显示文摘In this paper, we present a new system of weak signal detection based on Duffing oscillator with adjustable frequency, in which the frequency of periodic driving force signal can be fixed at a certain value and make the system to be in a same critical chaotic state. Therefore, by adjusting an adjustable signal frequency,the detection system we propose can detect signals of different frequencies in the same critical chaotic state, and overcome the limitation of the previous system which can only detect a signal of a specific frequency in a critical chaotic state. Meanwhile, we analyzed its system performance according to simulation and designed the circuit of the system. Based on the results of simulation and actual condition, we find the system is effective for weak signal detection. We can also find that in the proposed system, the signal detection accuracy increases firstly and then decreases with the increase in amplitude of adjustable signal, while the input noise variance is fixed.In addition, in the improved system, the smaller the variance of the input noise is, the higher the detection accuracy is, and the wider the adjustable operating range is. | MA SongShan LU Ming DING JiaFeng HUANG Wei YUAN Hong | 2015 | Science China(Information Sciences)2015，58，10： | 4 |
| 9 | mTOR pathway regulates the differentiation of peripheral blood Th2/Treg cell subsets in patients with pemphigus vulgaris显示文摘Pemphigus vulgaris(PV)is a chronic and potentially life-threatening autoimmune blistering disease.Aberrant mTOR pathway activity is involved in many autoimmune diseases.This study investigated the correlation of mTOR pathway(PI3K/AKT/mTOR/p70S6K)activity with the loss of balance in T helper 2/regulatory T(Th2/Treg)cells in the peripheral blood of PV patients.CD4^(+)T cells were isolated from 15 PV patients and 15 healthy controls(HCs),the ratios of Th2/CD4^(+)T cells and Treg/CD4^(+)T cells,the activity of the mTOR pathway(PI3K/AKT/mTOR/p70S6K),the transcription factors and cytokines of Th2 and Treg cells were detected.Primary CD4^(+)T cells from PV patients were cultured under Th2-or Treg-polarizing conditions with or without rapamycin in vitro.We found that PV patients showed significantly elevated serum IL-4 when compared with HCs,and serum IL-4 level was positively correlated with the titer of anti-Dsg1/3 antibody and disease severity,while the serum TGF-βlevel was negatively correlated with the titer of anti-Dsg3 antibody and disease severity.Meanwhile,PV patients showed increased Th2/CD4^(+)T cell ratio;decreased Treg/CD4^(+)T cell ratio;elevated mRNA of PI3K,AKT,mTOR and protein of PI3K(P85),AKT,p-AKT(Ser473),mTOR,p-mTOR(Ser2448),p-p70S6K(Thr389),GATA3;reduced protein of forkhead box protein 3.Rapamycin inhibited Th2 cell differentiation and promoted Treg cell differentiation in vitro.These data suggest a close association between mTOR pathway activation and the loss of balance in Th2/Treg cells in peripheral blood of PV patients.Inhibiting mTORC1 can help restore the Th2/Treg balance. | Kuan Lai Wenjing Zhang Songshan Li Zhiwen Zhang Shuangde Xie Meinian Xu Changxing Li Kang Zeng | 2021 | Acta Biochimica et Biophysica Sinica2021，53，4： | 4 |
| 10 | Geographic modeling and simulation systems for geographic research in the new era: Some thoughts on their development and construction显示文摘Regionality,comprehensiveness,and complexity are regarded as the basic characteristics of geography.The exploration of their core connotations is an essential way to achieve breakthroughs in geography in the new era.This paper focuses on the important method in geographic research:Geographic modeling and simulation.First,we clarify the research requirements of the said three characteristics of geography and its potential to address geo-problems in the new era.Then,the supporting capabilities of the existing geographic modeling and simulation systems for geographic research are summarized from three perspectives:Model resources,modeling processes,and operational architecture.Finally,we discern avenues for future research of geographic modeling and simulation systems for the study of regional,comprehensive and complex characteristics of geography.Based on these analyses,we propose implementation architecture of geographic modeling and simulation systems and discuss the module composition and functional realization,which could provide theoretical and technical support for geographic modeling and simulation systems to better serve the development of geography in the new era. | Min CHEN Guonian LV Chenghu ZHOU Hui LIN Zaiyang MA Songshan YUE Yongning WEN Fengyuan ZHANG Jin WANG Zhiyi ZHU Kai XU Yuanqing HE | 2021 | Science China Earth Sciences2021，64，8： | 3 |
| 11 | Genesis of excess argon in phengite and significance of ^(40)Ar-^(39)Ar age spectra for omphacite:A case study on UHP eclogite of South Dabie Terrain,China显示文摘The Ar-Ar dating of phengite and omphacite in ultrahigh-pressure (UHP) eclogite of Bixiling and Hengchong in the South Dabie Terrain shows that the content range of excess argon is as high as (0.4-1.3)×10 8 mol· g 1. The genesis of the excess argon is discussed. The Ar-Ar age spectra of omphacite could not support the opinion that the UHP metamorphism occurred in Caledon epoch and pre-Caledon epoch. | WANG Songshan, GE Ningjie, SANG Haiqing & QIU Ji1. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China 2. Department of Earth and Space Science, University of Science and Technology of China, Hefei 230026, China Correspondence should be addressed to Wang Songshan | 2000 | Chinese Science Bulletin2000，45，15： | 3 |
| 12 | A universal spray printing strategy to prepare gradient hybrid architectures显示文摘Functionally gradient materials(FGMs)have attracted tremendous attention due to their unique properties and structures.However,it is still a great challenge to prepare scalable FGMs by a universal,cost-effective,and highly efficient method.Here,a strategy of combining in situ concentration regulation and spraying is developed to fabricate continuously gradient composite films(GCFs),where the component gradient variation can be well controlled.This strategy is universal and versatile,which is beneficial to inducing different components into GCFs with gradient distributions and further constructing them with diverse configurations on various substrates.The gradient design endows the composite films with excellent mechanical strength and gradient electron transport pathways,which ensures that GCFs directly serve as the electrodes in electrochemical devices.As a proof of concept,free-standing GCFs based on V2O5 nanomaterials are used as cathodes of aqueous zinc-ion batteries.The resultant devices deliver superior electrochemical performances in comparison with the counterparts of homogeneous case.Therefore,this universal strategy provides a promising route in the scalable production of FGMs and further extends their applications in various fields. | Lingyu Du Songshan Bi Yang Hu Rui Wang Jiacai Zhu Minghui Zhang Zhiqiang Niu | 2022 | Carbon Energy2022，4，4： | 2 |
| 13 | Collision of the North China and Yangtse Blocks and formation of coesite-bearing eclogites: Timing and processes显示文摘 | Li Shuguang Xiao Yilin Lion Deliang Chert Yizhi Ge Ningjie Zhang Zongqing Sun Shen-su Cong Bolin Zhang Ruyuan Hart S R Wang Songshan | 1993 | Chem Geol1993，109，14： | 1 |
| 14 | Prototyping an open environment for sharing geographical analysis models on cloud computing platform显示文摘The sharing of geographical analysis models is of crucial importance for simulating geographic processes and phenomena in the current geographical information systems(e.g.Digital Earth),but there remain some issues that have not been completely resolved.The challenges include,eliminating model heterogeneity and searching for suitable infrastructures to support the open sharing and effective execution of models.Taking advantage of cloud computing,this article aims to address the above issues and develop an open environment for geographical analysis model sharing.On the basis of the analysis of the applicability of cloud computing,the architecture of the open environment is proposed.More importantly,key strategies designed for heterogeneous model description,model encapsulating as well as model deploying and transparent accessing in the cloud are discussed in detail to establish such an environment.Finally,the prototype environment is implemented,and experiments were conducted to verify the environment’s feasibility to support the sharing of geographical analysis models. | Yongning Wen Min Chen Guonian Lu Hui Lin Li He Songshan Yue | 2013 | International Journal of Digital Earth2013，6，4： | 1 |
| 15 | A framework on task configuration and execution for distributed geographical simulation显示文摘Geographical simulation is a popular method in geographical and environmental research.Many models developed to address geographic and environmental issues are distributed worldwide.However,due to the lack of portals,these models are still difficult to invoke for geographical simulations in open web environments.This study designs and develops a framework to assemble service-oriented models from volunteers distributed worldwide for geographical simulations on the web.The framework consists of three layers(task layer,data exchange layer,and model execution layer)that establish a network of serviceoriented locally shared models and simulation tasks for user configurations.With the help of such a framework,users can configure simulation tasks and invoke suitable models shared worldwide for geographical simulations.This article provides an application of the distributed simulation of gross primary production(GPP)by the Biome-BioGeochemical Cycles(BGC)model in China.This application shows that the framework can be beneficial for model assembly from volunteers’computers and distributed simulation tasks that are run for geographical and environmental issues,which can be applied to Digital Earth initiatives. | Fengyuan Zhang Min Chen Ming Wang Zihuan Wang Shuo Zhang Songshan Yue Yongning Wen Guonian Lü | 2021 | International Journal of Digital Earth2021，14，9： | 1 |
| 16 | The magmatism and deformation times of the Xidatan rock series,East Kunlun Mountains显示文摘 | Chen Wen Zhang Yah Ji Qiang Wang Songshan Zhang Jianxin | 2002 | Sci China (B)2002，，： | 1 |
| 17 | ExperimentalAnalysis of Pressure Distribution in a Twin ScrewCompressor Design显示文摘 | Cao Feng Gao Tieyu Li Songshan? | 2011 | Experimental Thermal and Flu-id Science2011，35，1： | 1 |
| 18 | Purification and charactrization of a novel NGF from Chinese cobra venom显示文摘 | Li Xiaobiao Liao Songshan Shu Yuyan | 1998 | Toxical Toxin Reviews1998，17，4： | 1 |
| 19 | Experimental analysis of pressure distribution in a twin screw compressor for muhiphase duties 显示文摘 | Cao Feng Gao Tieyu Li Songshan | 2011 | Experimental Thermal and Fluid Science2011，，： | 1 |
| 20 | Deductive vs. Inductive in the Strategies of Communication —Cultural Differences between East and West显示文摘 | Lanqin Zhang Qingxue Liu Songshan Hou | 2005 | US-China Foreign Language2005，3，7： | 1 |
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