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| 1 | The influence of synthetic jet excitation on secondary flow in compressor cascade显示文摘The detailed numerical simulation has been carried out to investigate the effect of synthetic jet excitation on the secondary flow at 5° incidence in a compressor cascade, in which the synthetic jet actuation is equipped on the suction surface. The influence of excitation position, one fixed near the trailing edge and the other fixed a little far from the trailing edge, has also been studied. The results show that unsteady disturbance of desirable synthetic jet effectively enhances the mixing of the fluid inside the separation region, which reduces the vortex intensity and the energy loss, improves the flow status in the cascade, and also suppresses velocity fluctuation near the trailing edge. Additionally, the actuation fixed near the separation region proves to be more effective and exit load distribution is more uniform due to the employment of the synthetic jet. | Yanming LIU, Tuo SUN, Chaobin GUAN and Baoguo WANG School of Aerospace Engineering, Beijing Institute of Technology, Beijing, 100081, China Assistant Professor | 2010 | Journal of Thermal Science2010，19，6： | 5 |
| 2 | China's Wetland Databases Based on Remote Sensing Technology显示文摘Wetland databases can provide the basic data that necessary for the protection and management of wetlands. A large number of wetland databases have been established in the world as well as in China. In this paper, we review China's wetland databases based on remote sensing(RS) technology after introducing the background theory to the application of RS technology in wetland surveys. A key conclusion is that China's wetland databases are far from sufficient in fulfilling protection and management needs. Our recommendations focus on the use of the hyper-spectral imagery, microwave data, multi-temporal images, and automatic classifications in order to improve the accuracy and efficiency of wetland inventory. Further, attention should also be paid to detect major biophysical features of wetlands and build wetland databases in years after the 1980 s in China. Considering that great gap exists between RS experts and wetland experts, further cooperation between wetland scientists and RS scientists are needed to promote the application of RS in the foundation of wetland databases. | YAN Fengqin LIU Xingtu CHEN Jing YU Lingxue YANG Chaobin CHANG Liping YANG Jiuchun ZHANG Shuwen | 2017 | Chinese Geographical Science2017，27，3： | 4 |
| 3 | Recent Advances in Polyaniline-Based Thermoelectric Composites显示文摘Polyaniline(PANI)-based thermoelectric(TE)materials have attracted considerable attention for flexible electronic energy harvesting devices because of properties such assolution processibility,excellent environmental stability,and low cost.However,the typical opposite dependence between electrical conductivity and Seebeck coefficient impedes their development,and tremendous efforts have been devoted to increasing their TE efficiency. | Siqi Liu Hui Li Pengcheng Li Yalong Liu Chaobin He | 2021 | CCS Chemistry2021，3，10： | 2 |
| 4 | Direct ink writing of programmable functional silicone-based composites for 4D printing applications显示文摘Polydimethylsiloxane(PDMS)has been widely used in flexible electronics,soft robotics,and bioelectronics.However,the fabrication of PDMS-based devices has mostly relied on conventional approaches,such as casting and molding,thereby limiting their potential.Here we fabricate PDMS-based composites with programmable microstructures by direct ink writing and realize their practical functionalities of four-dimensional(4D)printing.The mechanical,thermomechanical and magnetic properties of the three-dimensional-printed composites can be well tailored by using carbon,metal,or ceramic functional fillers.By taking advantage of the printable,flexible,and magnetic PDMS composites,we demonstrate new practical functionalities of 4D printing by designing programmable architectures,including magnetic-field-driven battery cases and patchworks,as well as arbitrary morphing ceramic structures.In particular,4D-printed batteries are constructed by PDMS-based battery cases for the first time,which can be actuated via external magnetic field.This study broadens the paradigm of 4D printing for prospective applications,such as implant batteries,biomimetic engineering,and customized biomedical devices. | Zhiyang Lyu J.ustin Koh Gwendolyn J.H.Lim Danwei Zhang Ting Xiong Lei Zhang Siqi Liu Junfei Duan Jun Ding John Wang Jinlan Wang Yunfei Chen Chaobin He | 2022 | Interdisciplinary Materials2022，1，4： | 2 |
| 5 | Synthesis and Self-Assembly of pH-Responsire Amphiphilic Poly (dimethyl-aminoethyl-methacrylate)-blockPoly (pentafluorostyrene) Block Copolymer in Aqueous Solution显示文摘 | Tan BH Chakravarthy S.Gudipati Hazrat Hussain Chaobin He Ye Liu and Thomas PD | | 0，，： | 1 |
| 6 | Hyperbranched blue-light-emitting alternating copolymers of tetrabromoarylmethane/silane and 9,9-dihexylfluorene-2,7-diboronic acid显示文摘 | Liu Xueming He Chaobin Hao Xiaotao | 2004 | Macromolecules2004，37，16： | 1 |
| 7 | Construction of a hierarchical multiscale conducting network for enhanced thermoelectric response in organic PEDOT:PSS based nanocomposites显示文摘Thermoelectric technology,which is characterized by the interconversion between heat and electricity,is demonstrated as an efficient and environmentally friendly route for thermal energy harvesting and solid-state cooling devices.The pursuit for high-performance room temperature thermoelectric materials is of significant interest.Here,we proposed a design strategy to dramatically improve the thermoelectric response by constructing a hierarchical multiscale conductor network(AgNWs/CNT)in polymer matrix(PEDOT:PSS).At the optimized composition,the highest Seebeck coefficient and electrical conductivity of base treated ternary PEDOT:PSS/AgNWs/CNT composite are optimized to be 58.6μV K^(-1)and~1950 S cm-1.Correspondingly,the power factor is thus calculated to be on the order of 670μV m^(-1)K^(-2),which is among one of the highest values compared with previous reports.The underlying mechanism is illustrated based on detailed structure,morphology and electron transport quantification.This work affords a novel strategy for the future development of high-performance room temperature nanocomposite thermoelectrics. | Yong Zhang Siqi Liu J.Justin Koh Chaobin He | 2021 | Journal of Materiomics2021，7，1： | 1 |
| 8 | Facile synthesis and highly efficient selective adsorption properties of Y2Mo4O15 for methylene blue:Kinetics,thermodynamics and mechanical analyses显示文摘Y_2 Mo_4 O_(15) particles were prepared using a simple solution method(SSM) and used as a highly efficient selective adsorbent for methylene blue(MB) in aqueous solutions. The maximum adsorption capacity of the samples was determined based on the adsorption isotherms with different adsorbent doses at 298,318 and 338 K. The fittings of the temperature-dependent isotherms yield ΔrG_m~θ =-34.1 kJ/mol,Δ_rH_m~θ=-36.9 kJ/mol and Δ_rS_m~θ=-9.67 J/mol·K. The as-prepared Y_2 Mo_4 O_(15) has a very large maximum adsorption capacity(i.e., 198 mg/g) for MB at room temperature, and this value is only less than that of amorphous hardwood powder. Notably, 80 mg of adsorbent is able to completely decolorize 250 mL of30 mg/L MB aqueous solution. The kinetic parameters of the adsorption process were obtained from the temperature-dependent adsorption isotherm(i.e., E_1=26.9 kJ/mol and E_1 = 63.8 kJ/mol). The results of adsorption kinetics show that it is a pseudo-second-order reaction. The mechanism of the high selectivity and the large adsorption capacity is discussed based on competitive ion(CI) experiments and coordination theory. | Junhua You Renchao Wang Chaobin Liu Xiaojie Shi Fei Han Rui Guo Xuanwen Liu | 2018 | Journal of Rare Earths2018，36，8： | 1 |
| 9 | Blue photoluminescence from hyperbranched poly(amino ester)s显示文摘 | WU Decheng LIU Ye HE Chaobin | 2005 | Macromolecules2005，38，24： | 1 |
| 10 | Thermal Degradation Behavior of Polyamide 6/Clay Nanooomposites 显示文摘 | K P Pramoda Tianxi Liu Zhenhui Liu Chaobin He Hung-Jue Sue | 2003 | Polymer Degradation and Stability2003，81，： | 1 |
| 11 | Organic inorganic nanocomposites from cubic silsesquioxane epoxides: Direct characterization of interphase, and thermomechanical properties 显示文摘 | Huang Junchao He Chaobin Liu Xueming | 2005 | Polymer2005，46，18： | 1 |
| 12 | Microdeformation and fracture mechanisms in polyamide-6/organoclay nanocomposites显示文摘 | Chaobin He Tianxi Liu Wuiwui Chauhari Tjiu | 2008 | Macromolecules2008，41，： | 1 |
| 13 | Piezoelectric and ferroelectric properties of Na_(0.5)Bi_(4.5)Ti_(4)O_(15)-BaTiO_(3) composite ceramics with Mg doping显示文摘As one of the representatives of lead-free NBT ceramics,Na_(0.5)Bi_(4.5)Ti_(4)O_(15) has still attracted much attention due to its excellent dielectric properties and has become the focus of research.However,its piezoelectric properties are far from satisfactory.In order to improve the piezoelectric properties of Na_(0.5)Bi_(4.5)Ti_(4)O_(15),Na_(0.5)Bi_(4.5)Ti_(4-x)Mg_(x)O_(y)–BaTiO_(3)(NBTM–BT)composite ceramics were synthesized by a conventional mixed oxide route and sintered at 1040℃ through two-step method.We optimized the electrical properties of NBTM–BT by changing the stoichiometric ratio of Mg content and studied its microscopic mechanism.The piezoelectric coefficient(d33)is stable at about 20 pC/N.Moreover,the maximum remanent polarization(2Pr)of the ceramic is 3.08C/cm^(2) with the coercive field of 18.01 kV/cm.The dielectric constant and dielectric loss for Na_(0.5)Bi_(4.5)Ti_(3.96)Mg_(0.04)–BT composite ceramic were found to be 486 and 0.17 at 10 kHz,respectively.The characteristic peaks of BT and Na_(0.5)Bi_(4.5)Ti_(4)O_(15) can be observed clearly from the X-ray diffraction analysis.SEM analysis showed that all samples were well crystallized.Consequently,the piezoelectric and ferroelectric properties of Na_(0.5)Bi_(4.5)Ti_(4)O_(15)–BT composite ceramic will be enhanced much by Mg doping,which means it has a wider range of applications in electronic devices such as piezoelectric devices. | Chaobin Jiang Chao Ma Qian Luo Kanghui Liu Lu Qin Zhentao Wu Wanqiang Cao Yong Chen | 2019 | Journal of Advanced Dielectrics2019，9，1： | 0 |
| 14 | New design for highly durable infrared-reflective coatings显示文摘The fundamental challenge in designing durable infrared-reflective coatings is achieving the ideal combination of both high reflectivity and durability.Satisfying these competing demands is traditionally achieved by deposition of durable layers on highly reflective metals.We overturn the traditional logic of‘first reflectivity and then durability’and propose an alternative of‘first durability and then reflectivity’:First,a transition-metal compound is selected as a durable base;then its reflectivity is improved by incorporating silver/gold to form an alloy or by overcoating a multilayer stack.Two validation experiments prove that the new strategy works extremely well:the coatings thus obtained have infrared reflectivities close to that of aluminum,and their hardness and acid and salt corrosion resistances are 27–50,400–1500 and 7500–25000 times that of aluminum.The traditional mirror coating(e.g.,Al/SiO2 films)is more suitable for moderate environments,while our mirror coating that was obtained by the new strategy(e.g.,an Ag-doped hafnium nitride film)is more suitable for harsh environments,such as ones with dust,windblown sand,moisture,acid rain or salt fog.This work opens up new opportunities for highly durable infrared-reflective coatings and rejuvenates the study of transition metal compounds in a completely new area of optics. | Chaoquan Hu Jian Liu Jianbo Wang Zhiqing Gu Chao Li Qian Li Yuankai Li Sam Zhang Chaobin Bi Xiaofeng Fan Weitao Zheng | 2017 | Light(Science & Applications)2017，6，1： | 0 |
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