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| 1 | Surveillance of Noise Exposure Level in the Manufacturing Industry—China,2020显示文摘Introduction:Occupational noise exposure is a widespread issue in the manufacturing industry in China.Since 2019,the National Surveillance System for Occupational Hazards in the workplace was established to understand different occupational hazards,especially occupational noise,in workplaces in China.Methods:Both environmental and individual noise exposure levels were measured for 19,378 enterprises according to the Work Plan for Surveillance of Occupational Hazards in the Workplace(2020)issued by National Health Commission of the People’s Republic of China.Median and interquartile range(IQR)were calculated to describe the distribution of the noise exposure level by industry classification,enterprise-scale,and ownership type of the enterprise.Results:Overall,25.14%of the individual noise exposure samples exceeded the Chinese national standard among the selected enterprises.The overall median of environmental noise exposure level was 82.8 dB(A)in selected enterprises,while the median of individual noise exposure level was 81.3 dB(A).The individual noise exposure level in the manufacture of metal products,manufacture of motor vehicles,minisized enterprises,collective enterprises and private enterprises was relatively high.Conclusion:Occupational noise is still one of the occupational hazards that cannot be ignored in the manufacturing industry,especially in mini-sized and private enterprises.The risk of noise exposure in the target industry is still high and will pose a threat to the health of workers. | Jinnan Zheng Siyu Zhang Hongfei Wang Yue Yu Weijiang Hu | 2021 | China CDC weekly2021，3，43： | 9 |
| 2 | Homogeneous bottom-growth of lithium metal anode enabled by double-gradient lithiophilic skeleton显示文摘Lithium(Li) metal is considered as the most promising anode material for the next-generation high performance Li batteries.However,the uncontrollable dendritic growth impedes its commercial application.Herein,we design a 3 D Si@carbon nanofibers(CNFs)@ZnO-ZnO-Cu skeleton(SCZ) for guiding the homogeneous bottom-growth of Li metal.The top LixSi@CNFs and bottom LiyZn@CNFs layers could form conductivity and overpotential gradient to avoid the 'top-growth' of Li metal.Moreover,the top lithiophilic LixSi@CNFs layer could regulate the nucleation and deposition of Li-ions even if the lithium dendrites grow out of the skeleton under high capacity Li deposition(30 mAh cm^(-2)).As a result,the SCZ-Li||LiFePO_(4) full cell delivers a high capacity of ~104 mAh g^(-1)(~94.82% capacity retention) after 2000 cycles at 5 C, elucidating the potential application of the 3 D double-gradient Li metal composite anode. | Li Zhang Hongfei Zheng Ben Liu Qingshui Xie Qiulin Chen Liang Lin Jie Lin Baihua Qu Laisen Wang Dong-Liang Peng | 2021 | Journal of Energy Chemistry2021，30，6： | 5 |
| 3 | Synthesis of mesoporous γ-AlOOH@Fe_3O_4 magnetic nanomicrospheres显示文摘Mesoporous γ-AlOOH@Fe3O4 magnetic nanomicrospheres were synthesized using superparamagnetic Fe3O4 nanoparticles as the core and aluminum isopropoxide(AIP) as the aluminum source.The obtained magnetic nanomicrospheres were characterized by X-ray powder diffraction(XRD),transmission electron microscopy(TEM),scanning electron microscopy(SEM),N2 adsorption-desorption and vibrating sample magnetometry(VSM).The effects of preparation parameters such as hydrolysis time of AIP,concentration of AIP and coating layer number on microspheres were investigated.The results indicated that the mesoporous γ-AlOOH@Fe3O4 magnetic nanomicrospheres consisted of a mesoporous-AlOOH shell and a Fe3O4 magnetic core.The diameter of γ-AlOOH@Fe3O4 nanomicrospheres was about 200 nm,the thickness of mesoporous-AlOOH shell was about 5 nm and the average pore size was 3.8 nm.The thickness of the mesoporous-AlOOH shell could be controlled via layer-by-layer coating times.The formation mechanism of the mesoporous-AlOOH shell involved a 'chemisorption-hydrolysis' process. | Yuanyuan Zheng Shengfu Ji Hongfei Liu Ming Li Hao Yang | 2012 | Particuology2012，10，6： | 3 |
| 4 | Experimental study of a micro-scale solar organic Rankine cycle system based on compound cylindrical Fresnel lens solar concentrator显示文摘In the present study, a micro-scale solar organic Rankine cycle power generation system was developed. The system comprises of a solar collection system based on compound cylindrical Fresnel lens concentrator and an organic Rankine cycle power generation system integrated with a scroll expander. YD320 and R245 fa were used as the heat transfer fluid and the working fluid, respectively. The effects of the evaporation pressure, the degree of superheat, and the mass flow rate of the working fluid were analyzed to evaluate the solar collection efficiency, the electric power output, the thermal efficiency and exergy efficiency of the system. The results illustrate that both the increasing evaporation pressure and decreasing superheat degree have positive impacts on solar collection efficiency. The electric power increases as the evaporation pressure increases, while the thermal efficiency and the exergy efficiency decrease. However, the system overall efficiency decreases slowly due to the increase of solar collection efficiency. The electric power increases with the increment of the working fluid mass flow rate. The increasing mass flow rate has no visible impact on the thermal and exergy efficiencies of organic Rankine cycle subsystem, whereas a slightly increase of the thermal and exergy efficiencies of the integrated system. The electric power decreases with the increase of the superheat degree, whereas the thermal and the exergy efficiencies of the system increase. The system works more suitably with a higher degree of superheat for the small mass flow rate condition. | MENG Jia SONG PanPan WEI MingShan TIAN GuoHong ZHAO Meng ZHENG HongFei HU GuangDa | 2019 | Science China(Technological Sciences)2019，62，12： | 3 |
| 5 | 3D uniform nitrogen-doped carbon skeleton for ultra-stable sodium metal anode显示文摘Sodium metal batteries are arousing extensive interest owing to their high energy density,low cost and wide resource.However,the practical development of sodium metal batteries is inherently plagued by the severe volume expansion and the dendrite growth of sodium metal anode during long cycles under high current density.Herein,a simple electrospinning method is applied to construct the uniformly nitrogen-doped porous carbon fiber skeleton and used as three-dimensional(3D)current collector for sodium metal anode,which has high specific surface area(1,098 m^2/g)and strong binding to sodium metal.As a result,nitrogen-doped carbon fiber current collector shows a low sodium deposition overpotential and a highly stable cyclability for 3,500 h with a high coulombic effciency of 99.9%at 2 mA/cm^2 and 2 mAh/cm^2.Moreover,the full cells using carbon coated sodium vanadium phosphate as cathode and sodium pre-plated nitrogen-doped carbon fiber skeleton as hybrid anode can stably cycle for 300 times.These results illustrate an effective strategy to construct a 3D uniformly nitrogen-doped carbon skeleton based sodium metal hybrid anode without the formation of dendrites,which provide a prospect for further development and research of high performance sodium metal batteries. | Ben Liu Danni Lei Jin Wang Qingfei Zhang Yinggan Zhang Wei He Hongfei Zheng Baisheng Sa Qingshui Xie Dong-Liang Peng Baihua Qu | 2020 | Nano Research2020，13，8： | 3 |
| 6 | Highly efficient perovskite solar cells based on symmetric hole transport material constructed with indaceno[1,2-b:5,6-b’]dithiophene core building block显示文摘Two novel hole transport materials (HTMs) with indaceno[1,2-b:5,6-b’]dithiophene (IDT) as core building blocks,termed IDT1 and IDT2,were designed and synthesized.The side alkyl chains were introduced to regulate and control the morphology and stacking behavior of HTMs,and the peripheral triarylamine arms were introduced to adjust the energy levels and to facilitate efficient hole transport.Applied in mesoporous structured perovskite solar cells (PSCs),HTM IDT1 achieved higher power conversion efficiency (PCE,19.55%) and better stability than Spiro-OMeTAD (19.25%) and IDT2 (15.77%) based PSC.These results suggest the potential of IDTl as a promising HTM for PSCs. | Cheng Wu Cheng Chen Li Tao Xingdong Ding Mengmeng Zheng Hongping Li Gongqiang Li Hongfei Lu Ming Cheng | 2020 | Journal of Energy Chemistry2020，29，4： | 2 |
| 7 | Deactivation study of unsupported nano MoS_(2) catalyst显示文摘The stability of catalyst is of great importance for a long-term operation.In this paper,the hydrodesulfurization stability and deactivation mechanism of unsupported nano MoS_(2) catalyst was examined with light cycle oil as feedstock under an extreme hydrotreating condition for 160 h.A typical supported catalyst was also studied for comparison purpose.The results show that the activity of nano MoS_(2) can be well maintained after initial deactivation in the first 60 h time-on-stream.Less coke was found on spent nano MoS_(2) than on the spent supported catalyst,though coke deposition is identified as the main cause of deactivation for the nano catalyst.Without acidic supports,only soft coke is formed on the surface of catalyst.Unlike the supported catalyst,decomposition of active phase played a minor role in the deactivation of nano MoS_(2). | Haiping Zhang Hongfei Lin Ying Zheng | 2020 | Carbon Resources Conversion2020，3，1： | 2 |
| 8 | Modified solvothermal synthesis of magnetic microspheres with multifunctional surfactant cetyltrimethyl ammonium bromide and directly coated mesoporous shell显示文摘 | Hongfei Liu Shengfu Ji Yuanyuan Zheng Ming Li Hao Yang | 2013 | Powder Technology2013，，： | 1 |
| 9 | A group of improved heat and mass transfer correlations in solar stills 显示文摘 | Zheng Hongfei Zhang Xiaoyan Zhang Jing | 2002 | Energy Conversion and Management2002，43，： | 1 |
| 10 | Experimental study on an enhanced falling film evaporation-air flow absorption and closed circulation solar still显示文摘 | Zheng Hongfei | 2001 | Energy2001，26，： | 1 |
| 11 | Automatic sorting of Chinese jujube using chlorophyll fluorescence andsupport vector machine显示文摘 | Zheng Hong Lu Hongfei Zheng Yueping | 2010 | Journal of Food Engineering2010，101，4： | 1 |
| 12 | Experimental investigation of a novel multi-effect solar desalination system based on humidification- dehumidification process 显示文摘 | Chang Zehui Zheng Hongfei Yang Yingjun | 2014 | Renewalbe Energy2014，，： | 1 |
| 13 | Effect of microwave pretreatment on the kinetics of ascorbic acid degradation and peroxidase inactivation in different parts of green asparagus (Asparagus officinalis L) during water blanching 显示文摘 | Zheng Hong Lu Hongfei | 2011 | Food Chemistry2011，128，4： | 1 |
| 14 | An Imaging Compounding Parabolic Concentrator 显示文摘 | HE Kaiyan ZHENG Hongfei LIU Yixin | 2007 | Proceeding of ISES Solar World Congress2007，2，： | 1 |
| 15 | A novel multiple curved surfaces compound concentrator 显示文摘 | He Kaiyan Zheng Hongfei Taotao | 2011 | Solar Energy2011，85，3： | 1 |
| 16 | Hybrid grid generation for viscous flow simulations in complex geometries显示文摘In this paper,we present a hybrid grid generation approach for viscous flow simulations by marching a surface triangulation on viscous walls along certain directions.Focuses are on the computing strategies used to determine the marching directions and distances since these strategies determine the quality of the resulting elements and the reliability of the meshing procedure to a large extent.With respect to marching directions,three strategies featured with different levels of efficiencies and robustness performance are combined to compute the initial normals at front nodes to balance the trade-off between efficiency and robustness.A novel weighted strategy is used in the normal smoothing scheme,which evidently reduces the possibility of early stop of front generation at complex corners.With respect to marching distances,the distance settings at concave and/or convex corners are locally adjusted to smooth the front shape at first;a further adjustment is then conducted for front nodes in the neighbourhood of gaps between opposite viscous boundaries.These efforts,plus other special treatments such as multi-normal generation and fast detection of local/global intersection,as a whole enable the setup of a hybrid mesher that could generate qualitied viscous grids for geometries with industry-level complexities. | Hongfei Ye Yang Liu Bo Chen Zhiwei Liu Jianjing Zheng Yufei Pang Jianjun Chen | 2020 | Advances in Aerodynamics2020，2，1： | 1 |
| 17 | A Influence of the receiver's back surface radiative characteristics on the performance of a heat-pipe evacuated-tube solar collector显示文摘 | Zheng Hongfei Xiong Jianying Su Yuehong | 2014 | Applied Energy2014，116，： | 1 |
| 18 | An imaging com- pounding parabolic concentrator 显示文摘 | He Kaiyan Zheng Hongfei Liu Yixin | 2007 | ISES Solar World Congress2007，2，3： | 1 |
| 19 | An experimental investigation on performance of bubble pump with lunate channel for absorption refrigeration system显示文摘 | Lianying Zhang Yuyuan Wu Hongfei Zheng Jingang Guo Dongsheng Chen | 2005 | International Journal of Refrigeration2005，，5： | 1 |
| 20 | Selective production of guaiacol from black liquor:Effect of solvents显示文摘Lignin is generated as a waste biomass from pulp and paper industry.The majority of kraft lignin is currently combusted as a low-grade energy source.Lignin valorization has been considered a feasible option to sustainable production of chemicals and liquid fuels in the long run.This study reports a novel thermolysis process that selectively converts black liquor lignin into guaiacol and its derivatives in highboiling-point hydrocarbon solvents:n-hexadecane(n-H)and 1-methyl naphthalene(1-MN).The operating pressure for lignin thermolysis in n-H and 1-MN is much lower than those in lignin liquefaction with low-boiling-point solvents,such as water,methanol,and ethanol.1-MN performed better than n-H in terms of lignin conversion and liquid yield.The liquid products were 56 wt%and 24 wt%for 1-MN and n-H as solvent respectively.Reaction temperature and reaction time rotating were investigated.Low temperature and short reaction time are favorable for generating Guaiacol.Compared to 1-MN as solvent,n-H promotes the production of guaiacol.The reaction mechanisms of lignin depolymerization to chemicals in different solvents were proposed.Solvent chemical properties and H abstraction processes from solvents play a key role in the selectivity of guaiacol. | Peng Feng Hui Wang Hongfei Lin Ying Zheng | 2019 | Carbon Resources Conversion2019，2，1： | 1 |
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