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| 1 | Identification of the state-space model and payload mass parameter of a flexible space manipulator using a recursive subspace tracking method显示文摘The on-orbit parameter identification of a space structure can be used for the modification of a system dynamics model and controller coefficients. This study focuses on the estimation of a system state-space model for a two-link space manipulator in the procedure of capturing an unknown object, and a recursive tracking approach based on the recursive predictor-based subspace identification(RPBSID) algorithm is proposed to identify the manipulator payload mass parameter. Structural rigid motion and elastic vibration are separated, and the dynamics model of the space manipulator is linearized at an arbitrary working point(i.e., a certain manipulator configuration).The state-space model is determined by using the RPBSID algorithm and matrix transformation. In addition, utilizing the identified system state-space model, the manipulator payload mass parameter is estimated by extracting the corresponding block matrix. In numerical simulations, the presented parameter identification method is implemented and compared with the classical algebraic algorithm and the recursive least squares method for different payload masses and manipulator configurations. Numerical results illustrate that the system state-space model and payload mass parameter of the two-link flexible space manipulator are effectively identified by the recursive subspace tracking method. | Zhiyu NI Jinguo LIU Zhigang WU Xinhui SHEN | 2019 | Chinese Journal of Aeronautics2019，32，2： | 8 |
| 2 | Adsorption of phenol from aqueous solution by a hierarchical micro-nano porous carbon material显示文摘A hierarchical micro-nano porous carbon material (MNC) was prepared using expanded graphite (EG), sucrose, and phosphoric acid as raw materials, followed by sucrose-phosphoric acid solution impregnation, solidification, carbonization and activation. Nitrogen adsorption and mercury porosimetry show that mixed nanopores and micropores coexist in MNC with a high specific surface area of 1978 m2·g-1 and a total pore volume of 0.99 cm3·g-1. In addition, the MNC is found to consist of EG and activated carbon with the latter deposited on the interior and the exterior surfaces of the EG pores. The thickness of the activated carbon layer is calculated to be about one hundred nanometers and is further confirmed by scanning electron microscope (SEM) and transmission election microscope (TEM). A maximum static phenol adsorption of 241.2 mg·g-1 was obtained by using MNC, slightly higher than that of 220.4 mg·g-1 by using commercial activated carbon (CAC). The phenol adsorption kinetics were investigated and the data fitted well to a pseudo-second-order model. Also, an intra-particle diffusion mechanism was proposed. Furthermore, it is found that the dynamic adsorption capacity of MNC is nearly three times that of CAC. The results suggest that the MNC is a more efficient adsorbent than CAC for the removal of phenol from aqueous solution. | Liu Chengbao Chen Zhigang Ni Chaoying Chen Feng Gu Cheng Cao Yu Wu Zhengying Li Ping | 2012 | Rare Metals2012，31，6： | 4 |
| 3 | Activation of the cold-sensing TRPM8 channel triggers UCP1-dependent thermogenesis and prevents obesity显示文摘Brown adipose tissue(BAT)is an energy-expending organ that produces heat.Expansion or activation of BAT prevents obesity and diabetes.Chronic cold exposure enhances thermogenesis in BAT through uncoupling protein 1(UCP1)activation triggered via a b-adrenergic pathway.Here,we report that the cold-sensing transient receptor potential melastatin 8(TRPM8)is functionally present in mouse BAT.Challenging brown adipocytes with menthol,a TRPM8 agonist,up-regulates UCP1 expression and requires protein kinase A activation.Upon mimicking long-term cold exposure with chronic dietary menthol application,menthol significantly increased the core temperatures and locomotor activity in wild-type mice;these effects were absent in both TRPM82/2 and UCP12/2 mice.Dietary obesity and glucose abnormalities were also prevented by menthol treatment.Our results reveal a previously unrecognized role for TRPM8,suggesting that stimulation of this channel mediates BAT thermogenesis,which could constitute a promising way to treat obesity. | Shuangtao Ma Hao Yu Zhigang Zhao Zhidan Luo Jing Chen Yinxing Ni Rongbing Jin Liqun Ma Peijian Wang Zhenyu Zhu Li Li Jian Zhong Daoyan Liu Bernd Nilius Zhiming Zhu | 2012 | Journal of Molecular Cell Biology2012，4，2： | 2 |
| 4 | γδT17 Cells Promote the Accumulation and Expansion of Myeloid-Derived Suppressor Cells in Human Colorectal Cancer显示文摘 | Pin Wu Dang Wu Chao Ni Jun Ye Wuzhen Chen Guoming Hu Zhen Wang Changrong Wang Zhigang Zhang Wenjie Xia Zhigang Chen Ke Wang Tao Zhang Jinghong Xu Yuehua Han Ting Zhang Xianguo Wu Jianwei Wang Weihua Gong Shu Zheng Fuming Qiu Jun Yan Jian Huang | 2014 | Immunity2014，，5： | 2 |
| 5 | Oriented polycrystalline mesoporous CeO 2 with enhanced pore integrity显示文摘 | Chaoying Ni Xiazhang Li Zhigang Chen Hui-Yin Harry Li Xinqiao Jia Ismat Shah John Q. Xiao | 2008 | Microporous and Mesoporous Materials2008，，3： | 1 |
| 6 | Association of angiotensin-converting enzyme 2 gene A/G polymorphism and elevated blood pressure in Chinese patients with metabolic syndrome显示文摘 | Jian Zhong Zhengchen Yan Daoyan Liu Yinxing Ni Zhigang Zhao Shanjun Zhu Martin Tepel Zhiming Zhu | 2006 | The Journal of Laboratory and Clinical Medicine2006，，2： | 1 |
| 7 | Layer-by-layer synthesis of hollow spherical CeO2 templated by carbon spheres显示文摘 | Xiazhang Li Feng Chen Xiaowang Lu Chaoying Ni Xiaobing Zhao Zhigang Chen | 2010 | Journal of Porous Materials2010，，3： | 1 |
| 8 | Restoring soil health to reduce irrigation demand and buffer the impacts of drought显示文摘Irrigation consumes three quarters of globalwater withdrawals each year. Strategies are needed toreduce irrigationwater use, including increasingtheefficiency of transfer methods and field application.Comprehensive restoration of soil health, specificallythrough organic matter amendments, can substantiallyreduce irrigation demand and increase crop yield. Aprogram to restore severely degraded and desertified soilsby incorporating coarse woodchips into the soil success-fully increased rainfall capture and elevated soil moisturefor several weeks between rainfall events at both Ningxia,north-west China and North Dakota, USA. With additionof fertilizer, woodchip incorporation further increasedgrowth of wheat and alfalfa. Comprehensive soil healthassessment of remnant grasslands was used to developtarget reference soil profiles by which to guide restorationefforts. Given that most agricultural soils are degraded tosome degree, soil health restoration can provide a powerfulstrategy toward achieving global food and water security. | Rebecca SCHNEIDER Stephen MORREALE Zhigang LI Erin MENZIES PLUER Kirsten KURTZ Xilu NI Cuiping WANG Changxiao LI Harold VAN ES | 2020 | Frontiers of Agricultural Science and Engineering2020，7，3： | 0 |
| 9 | Novel Germoles and Their Ladder-Type Derivatives:Modular Synthesis,Luminescence Tuning,and Electroluminescence显示文摘Considerable effort has been devoted to the design of silicon-containingπ-conjugated materials for application in optoelectronic devices and fluorescent bioimaging.However,the synthesis and spectroscopic tuning of germanium(Ge)-conjugated systems are challenging because of the paucity of synthetically useful methods.Herein,we report a simple and effective method of lithium naphthalenide-induced intramolecular cyclization to construct architecturally diverse Ge-containingπ-conjugated molecules,including benzogermoles and their ladder-type derivatives,with high yields of up to 92%.The photophysical properties of these molecules can befinely controlled by the introduction of electrondonating or-withdrawing substituents,and intense luminescence ranging from deep-blue to red regions in the solid state was observed.A quantitative model based on the Hammett constant against the luminescence wavelength showed a good linear correlation,allowing us to reliably predict and design luminescent materials with specific properties for applications.Notably,Ge-bridged ladder-type derivatives exhibited high photoluminescence and efficient deep-blue electroluminescence with good color purity.We believe this study will open a new avenue to organogermanium chemistry and offers greater flexibility for electronic structural tuning. | Xiaoshuang Xiang Zhikuan Zhou Xing Wu Zhigang Ni Lizhi Gai Xuqiong Xiao Liwen Xu Zujin Zhao Hua Lu Zijian Guo | 2022 | CCS Chemistry2022，4，12： | 0 |
| 10 | The Biomarker Changes of a Heavy Fuel Oil After Different Weathering Times显示文摘This paper presents the experimental results of composition changes of heavy fuel oil by simulating weathering in static seawater under natural environmental conditions. The results indicate: n-C10 to n-C15 were lost gradually in 24 weeks and the relative abundance of alkanes with long chains (>n-C19) increased markedly. The aromatic compounds with less than two rings (except C4N) were completely lost in 24 weeks and CnP and CnD became the main aromatics in the heavy fuel oil after 24 weeks. The ratios of n- C17/ Pristane (Pr) and n-C18/ Phytane (Ph) were suitable for identifying lightly weathered (3 weeks) heavy fuel oil. The ratios of n-C17/ n-C18 and Pr/Ph were suitable for identifying moderately weathered heavy fuel oil (12 weeks); the ratios of C2D/C2P and C3D/C3P did not change significantly in 24 weeks and were more suitable for identifying moderately weathered heavy fuel oil (24 weeks). | MA Qimin NI Zhanglin YU Zhigang | 2009 | Journal of Ocean University of China2009，8，1： | 0 |
| 11 | 10Be exposure ages of Quaternary Glaciers in Antarctica显示文摘In situ terrestrial cosmogenic nuclide(TCN)has been widely applied to date the ages of Quaternary glacial deposits in Antarctica and plays an important role in reconstructing the glacial evolution and climate change.It helps to under‐stand the Antarctic ice sheet's evolution process in Quaternary and shed light on the application of Cosmogenic Nu‐clide exposure dating technique in Glacial Geomorphology.In this paper,we retrieved 49510Be age samples in Ant‐arctica from literature published between 2004 and 2020 and recalculated the TCN ages using version 3.0 online cal‐culator of Cosmic-Ray Produced Nuclide Systematics on Earth(CRONUS-Earth).Several conclusions can be drawn from the results:(1)75%of the exposure ages are younger than 400 ka,and 91%younger than 1,100 ka.Northern Antarctic Peninsula exposure result is visibly younger than the main glaciers in East Antarctica due to climate change and geological evaluation since the LGM(Last Glacial Maximum).(2)TCN ages are relevant to the samples'relative positions in the Antarctic continent,but a relationship between their ages and elevations is yet to be determined based on the collected data. | WangJing Ni ZhiGang Zhang JingXue Guo XueYuan Tang | 2021 | Research in Cold and Arid Regions2021，13，4： | 0 |
| 12 | Effects of salt ions on rheological properties of SPI-GG hybrid system显示文摘The rheological characteristic of soy protein isolate(SPI),is one of the most important properties in its application in food industry.The effects of different concentrations of guar gum(GG,polysaccharide)and sodium chloride(salt ion)on the rheological properties of SPI were studied in this research.Steady-state shear,strain sweep and frequency sweep tests(static and dynamic rheological tests)were performed,and the following phenomenon and conclusions were drawn:(1)The viscosity of the hybrid system increases with the GG addition.This trend could also be seen with the appropriate adding of salt ion;(2)As the applied frequency increases,the storage modulus G′and the loss modulus G″of the hybrid system increase at a similar rate.And the frequency sweep parameters of the hybrid system rise significantly with the increase of both GG and ionic concentration;The frequency dependence of the system varies significantly with the addition of salt ion;(3)With the concentration of the salt ion increase,the storage module G′of the hybrid system decrease indicating that salt ion destroyed the network structure of hybrid dispersion to a certain extent. | Bi Chonghao Zhang Yulai Wu Min Ni Zijian Li Gang Liu Yi Li Dong Liu Yude Huang Zhigang | 2017 | International Journal of Agricultural and Biological Engineering2017，10，5： | 0 |
| 13 | Molecular oxygen-mediated selective hydroxyalkylation and alkylation of quinoxalin-2(1H)-ones with alkylboronic acids显示文摘Herein, an efficient molecular oxygen-mediated method for the selective hydroxyalkylation and alkylation of quinoxalin-2(1 H)-ones with alkylboronic acids under transition-metal free conditions has been developed. This strategy demonstrates a broad scope of quinoxalin-2(1 H)-ones and alkylboronic acids, giving3-hydroxyalkylquinoxalin-2(1 H)-ones and 3-alkylquinoxalin-2(1 H)-ones in moderate-to-good yield. Control experiments reveal that a radical pathway is involved. | Hongdou Zhang Jun Xu Yani Ouyang Xiaoguang Yue Chenxin Zhou Zhigang Ni Wanmei Li | 2022 | Chinese Chemical Letters2022，33，4： | 0 |
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