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| 1 | Long-term monitoring and source apportionment of PM_(2.5)/PM_(10) in Beijing,China显示文摘During 2001-2006,PM2.5 (particle matter with aerodynamic diameter less than 2.5 microns) and PM10 (particle matter with aerodynamic diameter less than 10 microns) were collected at the Beijng Normal University (BNU) site,China,and in 2006,at a background site in Duolun (DL).The long-term monitoring data of elements,ions,and black carbon showed that the major constituents of PM2.5 were black carbon (BC) crustal elements,nitrates,ammonium salts,and sulfates.These five major components accounted for 20%-80% of the total PM2.5.During this period,levels of Pb and S in PM remained rather high,as compared with the levels in other large cities in the world.Source apportionment results suggest that there were 6 common sources for PM2.5 and PM10,i.e.,soil dust,vehicular emission,coal combustion,secondary aerosol,industrial emission,and biomass burning.Coal combustion was the largest contributor of PM2.5 with a percentage of 16.6%,whereas soil dust played the most important role in PM10 with a percentage of 27%.In contrast,only three common types of sources could be resolved at the background DL site,namely,soil dust,biomass combustion,and secondary aerosol from combustion sources. | Hailin WANG Zhengping HAO | 2008 | Journal of Environmental Sciences2008，20，11： | 65 |
| 2 | Characterization and assessment of volatile organic compounds (VOCs) emissions from typical industries显示文摘VOCs play an increasingly important role in affecting air quality and threatening human health in China in recent years,where industry activities show a significant contribution to VOCs emission.In this article we report our long term study of industrial VOCs emissions of six major industries (vehicle manufacturing,printing,equipment coating,electronic manufacturing,furniture manufacturing and bio-pharming) on the aspects of emission characteristics,environmental impact and health risk assessment,and control challenge analysis with the purpose to obtain in-depth understanding of industry VOCs emissions and offer some original basements for national control and management of industry VOCs emissions.This study shows that all these industries give middle or low emission with total VOCs concentration less than 1000 mg/m3 at each exhaust pipe.Benzenes,esters,alcohols,ketones,alkanes,chloroalkanes and alkenes were detected as the major emission components and the most frequently monitored VOCs were benzenes,which varied obviously with different processes and industries.The environmental impact assessments indicate that vehicle manufacturing and benzenes should be prior controlled with the purpose to reduce air pollution.While,health risk assessments suggest that furniture manufacturing and chloroalkanes should be firstly controlled.Control analysis indicates that developing technologies with low cost and high efficiency and establishing and completing specific industry emission standards/regulations are the two key issues in VOCs emission management at present stage. | WANG HaiLin NIE Lie LI Jing WANG YuFei WANG Gang WANG JunHui HAO ZhengPing | 2013 | Science China(Technological Sciences)2013，56，3： | 60 |
| 3 | Mechanisms of action of angiogenin显示文摘Angiogenin 由激活容器 endothelial 和光滑的肌肉房间并且触发很多生物进程导致 angiogenesis,包括管状的结构的房间移植,侵略,增长,和形成。angiogenin 主要通过四条小径玩它的功能,这被报导了:(1 ) 施加它的 ribonucleolytic 活动;(2 ) 对膜肌动朊然后导致的地下室膜降级有约束力;(3 ) 对通常认为的 170-kDa 蛋白质并且随后有约束力 transducing 信号进细胞质;并且(4 ) translocating 进目标房间的原子核直接然后提高 ribosomal RNA 抄写。Angiogenin 也装 translocate 进癌症房间的原子核并且导致相应房间增长。而且, angiogenin 有在中央神经系统和它的功能的损失的活动可能与 amyotrophic 有关的 neuroprotective 侧面的硬化。这评论打算结束位于 angiogenin 的这些行动下面的机制并且在未来研究上给一个观点。 | Xiangwei Gao Zhengping Xu | 2008 | Acta Biochimica et Biophysica Sinica2008，40，7： | 25 |
| 4 | Start-up of anaerobic ammonia oxidation bioreactor with nitrifying activated sludge显示文摘The anaerobic ammonia oxidation(Anammox) bioreactor was successfully started up with the nitrifying activated sludge. After anaerobically operated for 105 d, the bioreactor reached a good performance with removal percentage of both ammonia and nitrite higher than 95% and volumetric total nitrogen removal as high as 149.55 mmol/(L·d). The soft padding made an important contribution to the high efficiency and stability because it held a large amount of biomass in the bioreactor. | ZHENGPing LINFeng-mei HUBao-lan CHENJian-song | 2004 | Journal of Environmental Sciences2004，16，1： | 26 |
| 5 | Source apportionment for urban PM_(10) and PM_(2.5) in the Beijing area显示文摘Airborne particulate matter (PM2.5 and PM10) samples were collected at the Beijing Normal University sampling site in the urban area of Beijing, China in dry and wet seasons during 2001―2004. Concen-trations of 23 elements and 14 ions in particulate samples were determined by ICP-AES and IC, re-spectively. Source apportionment results derived from both Positive Matrix Factorization (PMF) and Chemical Mass Balance (CMB) models indicate that the major contributors of PM2.5 and PM10 in Beijing are: soil dust, fossil fuel combustion, vehicle exhausts, secondary particulate, biomass burning and some industrial sources. We have identified both regional common sources, such as vehicular emis-sions, particulate of secondary origin and biomass burning, as well as country-specific problems, such as sand storms and soil dust that should be addressed for effective air quality control. | ZHANG Wei GUO JingHua SUN YeLe YUAN Hui ZHUANG GuoShun ZHUANG YaHui HAO ZhengPing | 2007 | Chinese Science Bulletin2007，52，5： | 22 |
| 6 | Performance of Anammox granular sludge bed reactor started up with nitrifying granular sludge显示文摘The anaerobic ammonia oxidation(Anammox) granular sludge bed reactor was started up successfully with nitrifying granular sludge. During the operation, the nitrifying granular sludge was gradually converted into Anammox granular sludge with good settling property and high conversion activity. The Anammox reactor worked well with the shortest HRT of 2 43 h. Under the condition that HRT w as 6 39 h and influent concentration of ammonia and nitrite was 10 mmol/L, the removal of ammonia and nitrite was 97 17% and 100 00%, respectively. Corresponding volumetric total nitrogen loading rate and volumetric total nitrogen conversion rate were 100 83 mmol/(L·d) and 98 95 mmol/(L·d). The performance of Anammox reactor was efficient and stable. | ZHENGPing LINFeng-mei HUBao-lan CHENJian-song: | 2004 | Journal of Environmental Sciences2004，16，2： | 17 |
| 7 | Adsorption of benzene, cyclohexane and hexane on ordered mesoporous carbon显示文摘Ordered mesoporous carbon(OMC) with high specific surface area and large pore volume was synthesized and tested for use as an adsorbent for volatile organic compound(VOC)disposal. Benzene, cyclohexane and hexane were selected as typical adsorbates due to their different molecular sizes and extensive utilization in industrial processes. In spite of their structural differences, high adsorption amounts were achieved for all three adsorbates, as the pore size of OMC is large enough for the access of these VOCs. In addition, the unusual bimodal-like pore size distribution gives the adsorbates a higher diffusion rate compared with conventional adsorbents such as activated carbon and carbon molecular sieve. Kinetic analysis suggests that the adsorption barriers mainly originated from the difficulty of VOC vapor molecules entering the pore channels of adsorbents. Therefore, its superior adsorption ability toward VOCs, together with a high diffusion rate, makes the ordered mesoporous carbon a promising potential adsorbent for VOC disposal. | Gang Wang Baojuan Dou Zhongshen Zhang Junhui Wang Haier Liu Zhengping Hao | 2015 | Journal of Environmental Sciences2015，27，4： | 15 |
| 8 | Anammox transited from denitrification in upflow biofilm reactor显示文摘Anammox was successfully transited from heterotrophic denitrification and autotrophic denitrification in two upflow biofilm reactors, respectively. The results showed that the volumetric loading rate and nitrogen removal efficiency in the reactor transited from heterotrophic denitrification were higher than that in its counterpart. When the hydraulic retention time was 12 h or so, the total nitrogen loading rate was about 0.609 kg N/(m3·d), and the effluent ammonia and nitrite concentrations were less than 8.5 mg/L and 2.5 mg/L, respectively. The upflow anammox biofilm reactor was capable of keeping and accumulating the slow-growing bacteria efficiently. During operation of the reactor, the biomass color was gradually turned from brownish to red, and the ratio of ammonia consumption, nitrite consumption and nitrate production approached the theoretical one. These changes could be used as an indicator for working state of the reactor. | ZHANGShao-hui ZHENGPing HUAYu-mei | 2004 | Journal of Environmental Sciences2004，16，6： | 14 |
| 9 | Characterization of PM_(2.5)/PM_(2.5-10) and source tracking in the juncture belt between urban and rural areas of Beijing显示文摘Coarse (PM2.5-10) and fine (PM2.5) atmospheric particulate samples were collected in summer and winter during 2005―2007 in the juncture belt between urban and rural areas of Beijing. Elements, ions, organic/elemental carbon (OC/EC) and polynuclear aromatic hydrocarbons (PAHs) were determined to obtain some latest information about the particulate pollution in the juncture belt of Beijing. Particulate matter levels at this site were high as compared with the levels at other sampling sites in Beijing. Pollution elements, secondary ions and PAHs were enriched in fine particles rather than in coarse particles. An obvious seasonal variation of the chemical composition of PM was observed. Source apportionment results showed that secondary components were the largest mass contributor of PM2.5, accounting for 28%; whereas soil-related sources were the largest contributor of PM2.5-10, explaining about 49% of the total mass. The abnormal levels of soil heavy metals at the electronic waste disassembly site in the upwind villages suggested the potential impact of such activities to the environment. | WANG HaiLin ZHOU YuMin ZHUANG YaHui WANG XiaoKe HAO ZhengPing | 2009 | Chinese Science Bulletin2009，54，14： | 11 |
| 10 | Three decades of research on angiogenin: a review and perspective显示文摘作为脊椎动物特定的分泌 ribonucleases 的一个成员, angiogenin ( ANG )完全被它导致新血容器形成,和现在的能力首先孤立并且识别,通过调整房间增长在各种各样的生理、病理学的进程起重要作用被认出了,幸存,移植,侵略,或区别。ANG 展出为它的生物功能是批评的很弱的 ribonucleolytic 活动,并且通过在不同目标房间激活不同发信号的 transduction 小径施加它的功能。一系列最近的研究显示了 ANG 贡献细胞的 nucleic 酸新陈代谢。这里,我们包括地在过去的三十年关于 ANG 的结构,机制,和功能考察研究的结果。而且,当前的问题和 ANG 的未来研究方向被讨论。在宽上下文的 ANG 的功能和机制的理解将帮助更好描出它在疾病的角色,特别在癌症和 neurodegenerative 疾病。 | Jinghao Sheng Zhengping Xu | 2016 | Acta Biochimica et Biophysica Sinica2016，48，5： | 11 |
| 11 | Development of a surface modeling method for mapping soil properties显示文摘(HASM ) 高精确性表面建模是能被使用玷污性质插值的一个方法。在这份报纸,我们在场 HASM 的一个方法联合了地理信息让土壤性质插值(HASM-SP ) 改进精确性。把类型,陆地使用类型和父母岩石基于土壤, HASM-SP 被使用插入内推在典型红土壤玷污可得到的 P,李, pH, alkali-hydrolyzable N,全部的 K 和 Cr 多山的区域。评估 HASM-SP 的表演,我们把它的表演与作比较平常的 kriging (好) ,平常的 kriging 联合了地理信息(OK-Geo ) 并且成层 kriging (SK ) 。结果证明方法包括 HASM-SP 与地理信息结合了, OK-Geo 获得了更低的评价偏爱。HASM-SP 也看了更少的 MAE 和 RMSE 它什么时候与另外的三个方法(OK-Geo,好和 SK ) 相比。更多细节由于为土壤性质的空间变化给了突然的边界的地理信息的不同类型的联合为土壤性质在 HASM-SP 地图被介绍。因此, HASM-SP 不能仅仅减少预言错误而且能与地理信息的分发一致,它做土壤性质的空间模拟更合理。HASM-SP 让充实不仅高精确性表面当模特儿土壤性质的理论,而且在资源管理并且环境计划为申请提供了一个科学方法。 | SHI Wenjiao LIU Jiyuan DU Zhengping YUE Tianxiang | 2012 | Journal of Geographical Sciences2012，22，4： | 11 |
| 12 | Research on crystal growth and properties of a new nonlinear optical crystal:Bismuth borate BiB_3O_6显示文摘BiB3O6 (BIBO) single crystals with sizes of 44 mm × 24 mm × 10 mm and weight of 24.7 g have been successfully grown by the top-seeded method. In this note, the preparation of seed, the growth of crystal and some problems encountered are reported. The lattice parameters of BIBO are a =7.1203(7)A, b = 4.9948(7)A, c = 6.5077(7)A, β= 105.586(8) ', V=222.93(5)A3, which were determined by BRUKER-P4 four-circle diffractometer. BIBO is biaxial crystal and the relative orientation of (X, Y, Z) with regard to (a, b, c) is: X|| b, (Y, c) =47.2°, (Z, a) = 31.6°, determined by the X-ray analysis combined with polarized microscopy. The second-harmonic-generation (SHG) conversion efficiency of the sample for 1.064 μm light is up to 67.7%. We have also obtained the third harmonic generation (THG) of 1.064 μm, namely, 1.064 μm + 0.532 μn →0.355 μm. BIBO crystal is free of moisture and hygroscopy. | TENG Bing, WANG Jiyang, WANG Zhengping, JIANG Huaidong, SONG Renbo, LIU Hong, HU Xiaobo, LIU Yaogang, WEI Jingqian & SHAO ZongshuState Key Laboratory of Crystal Materials, Shandong University, Ji’nan 250100, China | 2001 | Chinese Science Bulletin2001，46，21： | 10 |
| 13 | A novel pairing-free certificateless authenticated key agreement protocol with provable security显示文摘 | Haiyan SUN Qiaoyan WEN Hua ZHANG Zhengping JIN | 2013 | Frontiers of Computer Science2013，7，4： | 10 |
| 14 | Micromanufacturing technologies of compact heat exchangers for hypersonic precooled airbreathing propulsion: A review显示文摘The Hypersonic Precooled Combined Cycle Engine(HPCCE), which introduces precooler into traditional hypersonic engine, is regarded as the most promising propulsion system for realizing a single-stage-to-orbit vehicle. The unique demands lead to the application of the compact heat exchangers, which can realize high thrust-to-weight ratio, sufficient specific impulse and high compression ratio. However, it is challenging to accurately manufacture the compact heat exchanger due to its extremely high heat dissipation capacity, remarkable compactness, superior adaptability and harsh operating condition. This review summarizes the precooling schemes of combined cycle propulsions and describes the demands and key issues in the fabrication of a compact heat exchanger for HPCCE. The investigation focuses on the application of various micromanufacturing methods of heat exchangers constructed from tubes of less than 1 mm in diameter and microchannels of less than 200 micrometers. Various micromanufacturing processes, which include microforming, micromachining, stereolithography, chemical etching, 3 D printing, joining and other advanced microfabricating processes, were reviewed. In addition, the technologies are compared in terms of dimensional tolerance, material compatibility, and process applicability. Furthermore, the boundaries of the micromanufacturing constraints are specified as references for the design of compact heat exchangers. Ultimately, the technological difficulties and development trends are discussed for the fabrication of compact heat exchangers for HPCCE. | Bao MENG Min WAN Rui ZHAO Zhengping ZOU Huoxing LIU | 2021 | Chinese Journal of Aeronautics2021，34，2： | 10 |
| 15 | Catalytic oxidation of benzene over nanostructured porous Co_3O_4-CeO_2 composite catalysts显示文摘Mesostructured Co3O4-CeO2 composite was found to be an effective catalytic material for the complete oxidation of benzene. The Co3O4-CeO2 catalysts with different Co/Ce ratios (mol/mol) were prepared via the nanocasting method and the mesostructure was replicated from two-dimensional (2D) hexagonal SBA-15 and three-dimensional (3D) cubic KIT-6 silicas, respectively. All the obtained Co3O4-CeO2 catalysts exhibited the similar symmetry with the parent silicas and well ordered mesostructures. The Co3O4- CeO2 catalysts with 2D mesostructure showed lower catalytic activities than the corresponding 3D materials. The Co3O4-CeO2 catalyst nanocasted from KIT-6 and with the Co/Ce ratio of 16/1 possessed the best catalytic benzene oxidation activity due to larger quantities of surface hydroxyl groups and surface oxygenated species. The mesostructured Co3O4-CeO2 material thus shows great potential as a promising eco-environmental catalyst for benzene effective elimination. | Chunyan Ma Zhen Mu Chi He Peng Li Jinjun Li Zhengping Hao | 2011 | Journal of Environmental Sciences2011，23，12： | 9 |
| 16 | Effect of surface roughness on the aerodynamic performance of turbine blade cascade显示文摘The effect of surface roughness on the boundary development and loss behavior of turbine blades is investigated with different Reynolds numbers in this paper.The result shows that the velocity profile in boundary layer is plumper on rough surface than on smooth blade.The aerodynamic loss is lowered at low Reynolds number,but becomes significantly large at high Reynolds number.The total pressure loss coefficient of cascade can reach a top increase of 129%for rougher blades comparing with smooth blades at Re=300000. | Tao Bain Jingyuan Liu Weihao Zhang Zhengping Zou | 2014 | Propulsion and Power Research2014，3，2： | 9 |
| 17 | Sensitivity studies of a high accuracy surface modeling method显示文摘The sensitivities of the initial value and the sampling information to the accuracy of a high accuracy surface modeling(HASM) are investigated and the implementations of this new modeling method are modified and enhanced. Based on the fundamental theorem of surface theory, HASM is developed to correct the error produced in geographical information system and ecological modeling process. However, the earlier version of HASM is theoretically incomplete and its initial value must be produced by other surface modeling methods, such as spline, which limit its promotion. In other words, we must use other interpolators to drive HASM. According to the fundamental theorem of surface theory, we modify HASM, namely HASM.MOD, by adding another important nonlinear equation to make it independent of other methods and, at the same time, have a complete and solid theory foundation. Two mathematic surfaces and monthly mean temperature of 1951–2010 are used to validate the effectiveness of the new method. Experiments show that the modified version of HASM is insensitive to the selection of initial value which is particular important for HASM. We analyze the sensitivities of sampling error and sampling ratio to the simulation accuracy of HASM.MOD. It is found that sampling information plays an important role in the simulation accuracy of HASM.MOD. Another feature of the modified version of HASM is that it is theoretically perfect as it considers the third equation of the surface theory which reflects the local warping of the surface. The modified HASM may be useful with a wide range of spatial interpolation as it would no longer rely on other interpolation methods. | ZHAO Na YUE TianXiang ZHAO MingWei DU ZhengPing FAN ZeMeng CHEN ChuanFa | 2014 | Science China Earth Sciences2014，57，10： | 9 |
| 18 | Removal of cobalt(II) ion from aqueous solution by chitosan–montmorillonite显示文摘Montmorillonite(MMT)modified with chitosan(CTS,molecular weight=5×104)was applied to remove heavy metal cations by using Co2+as a model ion.An increase in MMT interlayer distance observed from X-ray diffraction indicates the intercalation of CTS into MMT.Together with the results of scanning electron microscopy and Fourier transform infrared spectroscopy,it was concluded that the composite material of CTS and MMT(CTS–MMT)was prepared successfully.The mass ratio of CTS to MMT had a strong influence on the adsorption performance of CTS–MMT.The highest adsorption value of 150 mg/g was obtained over the composite material with CTS to MMT mass ratio of 0.25,which is much higher than those reported in other studies.The adsorption isotherms and kinetic results indicated that Co2+was adsorbed over CTS–MMT in a multilayer model,and the chemical sorption of Co2+was determined to be the rate-limiting step. | Hailin Wang Haoqing Tang Zhaotie Liu Xin Zhang Zhengping Hao Zhongwen Liu | 2014 | Journal of Environmental Sciences2014，26，9： | 8 |
| 19 | An experimental method for squealer tip flow field considering relative casing motion显示文摘Squealer tip is widely used in turbines to reduce tip leakage loss.In typical turbine environment,the squealer tip leakage flow is affected by multiple factors such as the relative casing motion and the wide range of variable incidence angles.The development of experimental methods which can accurately model the real turbine environment and influencing factors is of great significance to study the squealer tip leakage flow mechanism.In the present paper,a low-speed turbine cascade test facility which can model the relative casing motion and wide range of variable incidence angles(-25°to 55°)is built.Based on the similarity criteria,a high-low speed similarity transformation method of the turbine cascade is established by considering the thickness of the turbine blade.A combined testing method of Particle Image Velocimetry(PIV)and local pressure measurement is proposed to obtain the complex flow structures within the tip cavity.The results show that the experimental method can successfully model the relative casing motion and the wide range of variable incidence angles.The low-speed cascade obtained by the similarity transformation can model the high-speed flow accurately.The measurement technique developed can obtain the complex flow field and successfully capture the scraping vortex within the squealer tip. | Fei ZENG Jinlin DU Lin HUANG Liming XUAN Qiang ZHAO Zhengping ZOU | 2020 | Chinese Journal of Aeronautics2020，33，7： | 8 |
| 20 | A fundamental theorem for eco-environmental surface modelling and its applications显示文摘We propose a fundamental theorem for eco-environmental surface modelling(FTEEM) in order to apply it into the fields of ecology and environmental science more easily after the fundamental theorem for Earth’s surface system modeling(FTESM). The Beijing-Tianjin-Hebei(BTH) region is taken as a case area to conduct empirical studies of algorithms for spatial upscaling, spatial downscaling, spatial interpolation, data fusion and model-data assimilation, which are based on high accuracy surface modelling(HASM), corresponding with corollaries of FTEEM. The case studies demonstrate how eco-environmental surface modelling is substantially improved when both extrinsic and intrinsic information are used along with an appropriate method of HASM. Compared with classic algorithms, the HASM-based algorithm for spatial upscaling reduced the root-meansquare error of the BTH elevation surface by 9 m. The HASM-based algorithm for spatial downscaling reduced the relative error of future scenarios of annual mean temperature by 16%. The HASM-based algorithm for spatial interpolation reduced the relative error of change trend of annual mean precipitation by 0.2%. The HASM-based algorithm for data fusion reduced the relative error of change trend of annual mean temperature by 70%. The HASM-based algorithm for model-data assimilation reduced the relative error of carbon stocks by 40%. We propose five theoretical challenges and three application problems of HASM that need to be addressed to improve FTEEM. | Tianxiang YUE Na ZHAO Yu LIU Yifu WANG Bin ZHANG Zhengping DU Zemeng FAN Wenjiao SHI Chuanfa CHEN Mingwei ZHAO Dunjiang SONG Shihai WANG Yinjun SONG Changqing YAN Qiquan LI Xiaofang SUN Lili ZHANG Yongzhong TIAN Wei WANG Ying’an WANG Shengnan MA Hongsheng HUANG Yimin LU Qing WANG Chenliang WANG Yuzhu WANG Ming LU Wei ZHOU Yi LIU Xiaozhe YIN Zong WANG Zhengyi BAO Miaomiao ZHAO Yapeng ZHAO Yimeng JIAO Ufra NASEER Bin FAN Saibo LI Yang YANG John PWILSON | 2020 | Science China Earth Sciences2020，63，8： | 7 |
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