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| 1 | Explicit diagnosis of the local ozone production rate and the ozone-NOx-VOC sensitivities显示文摘In the troposphere, ozone is a harmful gas compound to both human health and vegetation. Ozone is produced from the reaction of NO_x(@NO + NO_2) and VOCs(volatile organic compounds) with light. Due to the highly nonlinear relationships between ozone and its precursors, proper ozone mitigation relies on the knowledge of chemical mechanisms. In this study, an observation-based method is used to simulate ozone formation and elucidate its controlling factors for a rural site on the North China Plain. The instantaneous ozone production rate is calculated utilizing a box model using the dataset obtained from the Wangdu campaign. First, the model was operated in a time-dependent mode to calculate the ozone production rate at each time stamp. The calculated ozone formation rate showed a diurnal average maximum value of 17 ppbv/h(1-h diurnal averaged). The contribution of individual peroxy radicals to ozone production was analyzed. In addition, the functional dependence of calculated P(O_3) reveals that ozone production was in a NO_x-limited regime during the campaign. Furthermore, the missing peroxy radical source will further extend NO_x-limited conditions to earlier in the day, making NO_xlimitation dominate more of a day than the current chemical model predicts. Finally, a multiple scenarios mode,also known as EKMA(empirical kinetic modeling approach), was used to simulate the response of P(O_3) to the imaginary change in precursor concentrations. We found that ozone production was in the NO_x-limited region. However, the use of NO_2 measured by the molybdenum converter and/or the absence of a peroxy radical source in the current chemical model could over-emphasize the VOC-limited effect on ozone production. | Zhaofeng Tan Keding Lu Huabin Dong Min Hu Xin Li Yuhan Liu Sihua Lu Min Shao Rong Su Haichao Wang Yusheng Wu Andreas Wahner Yuanhang Zhang | 2018 | Science Bulletin2018，63，16： | 25 |
| 2 | Exploring atmospheric free-radical chemistry in China:the self-cleansing capacity and the formation of secondary air pollution显示文摘Since 1971,it has been known that the atmospheric free radicals play a pivotal role in maintaining the oxidizing power of the troposphere.The existence of the oxidizing power is an important feature of the troposphere to remove primary air pollutants emitted from human beings as well as those from the biosphere.Nevertheless,serious secondary air-pollution incidents can take place due to fast oxidation of the primary pollutants.Elucidating the atmospheric free-radical chemistry is a demanding task in the field of atmospheric chemistry worldwide,which includes two kinds of work:first,the setup of reliable radical detection systems;second,integrated field studies that enable closure studies on the sources and sinks of targeted radicals such as OH and NO3.In this review,we try to review the Chinese efforts to explore the atmospheric free-radical chemistry in such chemical complex environments and the possible link of this fast gas-phase oxidation with the fast formation of secondary air pollution in the city-cluster areas in China. | Keding Lu Song Guo Zhaofeng Tan Haichao Wang Dongjie Shang Yuhan Liu Xin Li Zhijun Wu Min Hu Yuanhang Zhang | 2019 | National Science Review2019，6，3： | 26 |
| 3 | Exploration of the formation mechanism and source attribution of ambient ozone in Chongqing with an observation-based model显示文摘An intensive field campaign was conducted in Chongqing during the summer of 2015 to explore the formation mechanisms of ozone pollution. The sources of ozone, the local production rates, and the controlling factors, as well as key species of volatile organic compounds(VOCs), were quantified by integrating a local ozone budget analysis, calculations of the relative incremental reactivity, and an empirical kinetic model approach. It was found that the potential for rapid local ozone formation exists in Chongqing. During ozone pollution episodes, the ozone production rates were found to be high at the upwind station Nan Quan, the urban station Chao Zhan, and the downwind station Jin-Yun Shan. The average local ozone production rate was 30×10^(-9) V/V h^(-1) and the daily integration of the produced ozone was greater than 180×10^(-9) V/V. High ozone concentrations were associated with urban and downwind air masses. At most sites, the local ozone production was VOC-limited and the key species were aromatics and alkene, which originated mainly from vehicles and solvent usage. In addition, the air masses at the northwestern rural sites were NO_x-limited and the local ozone production rates were significantly higher during the pollution episodes due to the increased NOx concentrations. In summary, the ozone abatement strategies of Chongqing should be focused on the mitigation of VOCs. Nevertheless, a reduction in NO_x is also beneficial for reducing the regional ozone peak values in Chongqing and the surrounding areas. | SU Rong LU KeDing YU JiaYan TAN ZhaoFeng JIANG MeiQing LI Jing XIE ShaoDong WU YuSheng ZENG LiMin ZHAI ChongZhi ZHANG YuanHang | 2018 | Science China Earth Sciences2018，61，1： | 24 |
| 4 | Heat and power load dispatching considering energy storage of district heating system and electric boilers显示文摘As one of promising clean and low-emission energy, wind power is being rapidly developed in China.However, it faces serious problem of wind curtailment,particularly in northeast China, where combined heat and power(CHP) units cover a large proportion of the district heat supply. Due to the inherent strong coupling between the power and the heat load, the operational flexibility of CHP units is severely restricted in winter to meet the heat supply demand, which imparts considerable stress on the wind power connection to the grid. To promote the integration of wind power and enhance the flexibility of CHP units, this paper presented a method of heat and power load dispatching by exploring the energy storage ability of electric heating boilers and district heating systems. The optimization results indicate that the proposed method can integrate additional wind power into the grid and reduce the coal consumption of CHP units over the optimized period. Furthermore, the thermal inertia of a district heating system is found to contribute more to the reduction of coal consumption, whereas the electric heating boilers contribute to lower wind curtailment. | Xianzheng HUANG Zhaofeng XU Yong SUN Yali XUE Zhe WANG Zhijun LIU Zhenyuan LI Weidou NI | 2018 | Journal of Modern Power Systems and Clean Energy2018，6，5： | 20 |
| 5 | Start of vegetation growing season on the Tibetan Plateau inferred from multiple methods based on GIMMS and SPOT NDVI data显示文摘在这研究,我们使用了四个方法从 1982~2012 在西藏的高原( TP )上调查成长季节( SGS )的开始,用从全球库存为研究建模并且印射获得的规范的差别植被索引( NDVI )数据( GIMSS , 19822006 )并且点植被( SPOT-VGT , 19992012 )。用四个方法估计的 SGS 价值沿着纬度或高度的坡度显示出类似的空间模式,但是与在 SGS 日期的重要变化。最大的差异主要在这些区域被发现与最高或最低植被范围。在 1982 和 1998 之间,然而,从四个方法导出的 SGS 值都根据更最近的点 VGT 数据(19992012 ) 显示一个进展趋势,没有 TP 上的 SGS 的连续地进展的趋势。在价值从在 1999 和 2006 之间的 GIMMS 和点导出的 SGS 之间的关联的分析数据来源与问候在趋势表明一致性到并且到使用的四个分析方法。与另外的方法相比,最大的一致性在之间在里面 situ 数据和检索的 SGS 值与方法 3 被获得(NDVI 比率的阀值) 。避免错误在有多样的植被类型和物理环境的一个广阔区域,知道不同植被类型的季节的变化特征是批评的,特别地在有稀少的草地的区域或常绿树森林。 | DING Mingjun LI Lanhui ZHANG Yili SUN Xiaomin LIU Linshan GAO Jungang WANG Zhaofeng LI Yingnian | 2015 | Journal of Geographical Sciences2015，25，2： | 17 |
| 6 | Crop cover reconstruction and its effects on sediment retention in the Tibetan Plateau for 1900-2000显示文摘地理上明确的历史的陆地使用和陆地盖子数据集逐渐地在人的活动的气候、生态的效果的研究被要求。在这研究,把历史的人口数据用作一个代理, Qinghai 省的省的农田区域和西藏为 1900, 1930,和 1950 的自治区域(tar ) 被估计。为 1980 和 2000 的 Qinghai 和 TAR 的农田区域与修订从出版统计数据被获得。用为耕作模型的陆地适用性,为第 20 世纪的省的农田区域与 1 | LI Shicheng WANG Zhaofeng ZHANG Yili | 2017 | Journal of Geographical Sciences2017，27，7： | 16 |
| 7 | Polymer assisted deposition of high-quality CsPbI2Br film with enhanced film thickness and stability显示文摘Inorganic halide perovskites such as cesium lead iodide(CsPbI3)have drawn tremendous attention,as their tunable band gaps are desirable for solar cells as well as light emitting diodes.However,due to their low Goldschmidt tolerance factor,the cubic phase of bulk CsPbX3-the variant with desirable band gap-is not stable in ambient,especially in humid air.Besides,the low solubility of CsX in precursor makes it difficult to control the film thickness and morphology of CsPbX3,which becomes another obstacle for the practical application of inorganic perovskite.Here,we report a polymer assisted deposition of high-quality CsPbI2Br film by spin-coating a polymer-blended CsPbI2Br precursor.The long-chained polymer increases the viscosity of the solution,which enables us to achieve a ca.700-nm thick film with a low solution concentration of CsPbI2Br.Moreover,the polymer network helps to regulate the crystallization process and provides more crystallization sites for perovskite film,reducing grain size and thus improving the film coverage.Perovskite solar cells with the polymer network exhibit improved efficiency and reproducibility(0.72%standard deviation).Moreover,the device demonstrates excellent robustness against moisture and oxygen,and maintains 90%of its initial power conversion efficiency(PCEs)after aging 4 months in ambient conditions.The conception of polymer incorporation into inorganic perovskite films paves a way to further increase the performance,stability and reproducibility of inorganic perovskite devices. | Jing Wei Xi Wang Xiangyu Sun Zhaofeng Yang Iwan Moreels Kun Xu Hongbo Li | 2020 | Nano Research2020，13，3： | 6 |
| 8 | Architecture of type VI secretion system membrane core complex显示文摘Dear Editor, Type VI secreti on system (T6SS) adopts a con tact-dependent secretion mechanism to deliver various lethal effectors into prokaryotic or eukaryotic cells.1,2 Due to its antibacterial and anti-eukaryotic activity, T6SS provides a powerful weapon for bacteria to kill their competitors and attackers.2 T6SS has been show n to resemble a bacteriophage tail-like nano machine of more than 13 components. | Meng Yin Zhaofeng Yan Xueming Li | 2019 | Cell Research2019，29，3： | 5 |
| 9 | Control of endwall secondary flow in a compressor cascade with dielectric barrier discharge plasma actuation显示文摘Three dielectric barrier discharge plasma actuators were mounted at the positions of 20%,40%and 60%of chord length on the endwall in a compressor cascade.The downstream flow field of the cascade has been measured with a mini five-hole pressure probe with and without the plasma actuation.The measured results show that the plasma actuation most effectively reduces total pressure loss and flow blockage when the actuators are operated simultaneously.As each of the actuators is operated independently,the actuator at the position of 20%of chord length most effectively reduces flow blockage, and the actuator at the position of 60%of chord length fairly reduces total pressure loss.However, negative pressure loss reduction occurs with the plasma actuator at the position of 40%of chord length.In brief,the plasma actuation placed on the endwall in the cascade apparently influences the endwall secondary flow,and the optimal locations and strength of actuation are critical for the control of endwall secondary flow in a compressor cascade with the plasma actuators. | LI Gang XU YanJi LIN Bin ZHU JunQiang NIE ChaoQun MA HongWei WANG ZhaoFeng | 2009 | Science China(Technological Sciences)2009，52，12： | 5 |
| 10 | A tubular focused sonochemistry reactor显示文摘This paper presents a new sonochemistry reactor, which consists of a cylindrical tube with a certain length and piezoelectric transducers at tube’s end with the longitudinal vibration. The tube can effectively transform the longitudinal vibration into the radial vibration and thereby generates ultrasound. Furthermore, ultrasound can be focused to form high-intensity ultrasonic field inside tube. The reactor boasts of simple structure and its whole vessel wall can radiate ultrasound so that the electroacoustic transfer efficiency is high. The focused ultrasonic field provides good condition for sonochemical reaction. The length of the reactor can be up to 2 meters, and liquids can pass through it continuously, so it can be widely applied in liquid processing such as sonochemistry. | ZHOU GuangPing LIANG ZhaoFeng LI ZhengZhong ZHANG YiHui | 2007 | Chinese Science Bulletin2007，52，14： | 4 |
| 11 | A Review of Comminution Age Method and Its Potential Application in the East China Sea to Constrain the Time Scale of Sediment Source-to-Sink Process显示文摘The East China Sea(ECS) is a river-dominated epicontinental sea, linking the Asian continent to the northwestern Pacific via the large rivers originating from Tibetan Plateau. The relevant huge influx of riverine detritus has developed unique sedimentary systems in the ECS during the Quaternary, offering ideal terrestrial archives for reconstructing Quaternary paleoenvironmental changes and studying land-sea interactions. Overall, two characteristic river systems dominate the sedimentary systems and sediment source to sink transport patterns in the ECS, represented by the Changjiang(Yangtze River) and Huanghe(Yellow River) for the large river system and Taiwan rivers for the small river system. Given this, the sediments derived from both river systems bear distinct features in terms of parent rock lithology, provenance weathering and sediment transport. Previous studies mostly focus on either the ‘source' discrimination or the ‘sink' records of the sedimentary system in the ECS, while the source to sink process linking the land and sea, in particular its time scale, has been poorly understood. Here we introduce a newly-developed dating technique, the ‘comminution age' method, which offers a quantitative constraint on the time scale of sediment transfer from its ultimate source to the final depositional sink. This novel method is of great significance for improving our understanding on the earth surface processes including tectonic-climate driven weathering, and sediment recycling in relation to landscape evolution and marine environmental changes. The application of comminution age method in the ECS will provide important constraints on sediment source-to-sink process and more evidences for the construction of late Quaternary paleoenvironmental changes under these unique sedimentary systems. | LI Chao YANG Shouye LIAN Ergang BI Lei ZHANG Zhaofeng | 2015 | Journal of Ocean University of China2015，14，3： | 4 |
| 12 | Diamond/β-SiC film as adhesion-enhanced interlayer for top diamond coatings on cemented tungsten carbide substrate显示文摘In present work, diamond/β-SiC composite interlayers were deposited on cemented tungsten carbide(WC-6%Co) substrates by microwave plasma enhanced chemical vapor deposition(MPCVD) using H_2,CH_4 and tetramethylsilane(TMS) gas mixtures. The microstructure, chemical bonding, element distribution and crystalline quality of the composite interlayers were systematically characterized by means of field-emission scanning electron microscopy(FE-SEM), X-ray diffraction(XRD), X-ray photoelectron spectrometer(XPS), electron probe microanalysis(EPMA), Raman spectroscopy and transmission electron microscropy(TEM). The influences of varying TMS flow rates on the diamond/β-SiC composite interlayers were investigated. Through changing the TMS flow rates in the reaction gas, the volume fraction of β-SiC in the composite interlayers were tunable in the range of 12.0%–68.1%. XPS and EPMA analysis reveal that the composite interlayers are composed of C, Si element with little cobalt distribution. The better crystallinity of the diamond in the composite is characterized based on the Raman spectroscopy, which are helpful to deposit top diamond coatings with high quality. Then, the adhesion of top diamond coatings were estimated using Rockwell C indentation analysis, revealing that the adhesion of top diamond coatings on the WC-6%Co substrates can be improved by the interlayers with the diamond/β-SiC composite structures. Comprehensive TEM interfacial analysis exhibits that the cobalt diffusion is weak from WC-6%Co substrate to the composite interlayer. The homogeneous microcrystalline diamond coatings with the most excellent adhesion can be fabricated on the substrates with the composite interlayer with the β-SiC/diamond ratio of about 45%. The composite structures are appropriate for the application in high-efficiency mechanical tool as a buffer layer for the deposition of the diamond coating. | Qingquan Tian Nan Huang Bing Yang Hao Zhuang Chun Wang Zhaofeng Zhai Junhao Li Xinyi Jia Lusheng Liu Xin Jiang | 2017 | Journal of Materials Science & Technology2017，33，10： | 3 |
| 13 | Nitrogen-doped carbon stabilized Li Fe0.5Mn0.5PO4/rGO cathode materials for high-power Li-ion batteries显示文摘Exploring high ion/electron conductive olivine-type transition metal phosphates is of vital significance to broaden their applicability in rapid-charging devices.Herein,we report an interface engineered Li Fe0.5Mn0.5PO4/rGO@C cathode material by the synergistic effects of r GO and polydopamine-derived N-doped carbon.The well-distributed Li Fe0.5Mn0.5PO4nanoparticles are tightly anchored on r GO nanosheet benefited by the coating of N-doped carbon layer.The design of such an architecture can effectively suppress the agglomeration of nanoparticles with a shortened Li+transfer path.Meantime,the high-speed conducting network has been constructed by r GO and N-doped carbon,which exhibits the face-to-face contact with Li Fe0.5Mn0.5PO4nanoparticles,guaranteeing the rapid electron transfer.These profits endow the Li Fe0.5Mn0.5PO4/rGO@C hybrids with a fast charge-discharge ability,e.g.a high reversible capacity of 105 m Ah·g^-1at 10 C,much higher than that of the Li Fe0.5Mn0.5PO4@C nanoparticles(46 mA·h·g^-1).Furthermore,a 90.8%capacity retention can be obtained even after cycling 500 times at 2 C.This work gives a new avenue to fabricate transition metal phosphate with superior electrochemical performance for high-power Li-ion batteries. | Haifeng Yu Zhaofeng Yang Huawei Zhu Hao Jiang Chunzhong Li | 2020 | Chinese Journal of Chemical Engineering2020，28，7： | 3 |
| 14 | Joint Toxicity of Beauveria bassiana and Two Insect Growth Regulators on Beet Armyworm,Spodoptera exigua(Hübner)显示文摘Joint toxicity of Beauveria bassiana and two insect growth regulators,methoxyfenozide and hexaflumuron,on beet armyworm larvae,Spodoptera exigua(Hübner),were investigated.An obvious synergism effect of the two insect growth regulators with B.beauveria was observed.When the insect growth regulators at LC_(50) concentrations(25×10^(-6)g/L for methoxyfenozide and 1 000×10^(-6) g/L for hexaflumuron)were mixed with B.bassiana at the volume ratio of 4∶1,the mixtures achieved the best efficacy.The co-toxicity co-efficient(CTC)of methoxyfenozide and B.bassiana was 285,and that of hexaflumuron and B.bassiana was 208.Scanning electron microscope observation of the longitudinal section of S.exigua revealed obviously different patterns of integument in different treatment groups. | Hu Anling Tian Zhaofeng Gao Xiwu Nong Xiangqun Li Yongdan | 2016 | Plant Diseases and Pests2016，7，5： | 2 |
| 15 | A Blockchain-Based Credible and Secure Education Experience Data Management Scheme Supporting for Searchable Encryption显示文摘With the in-depth application of new technologies such as big data in education fields,the storage and sharing model of student education records data still faces many challenges in terms of privacy protection and efficient transmission.In this paper,we propose a data security storage and sharing scheme based on consortium blockchain,which is a credible search scheme without verification.In our scheme,the implementation of data security storage is using the blockchain and storage server together.In detail,the smart contract provides protection for data keywords,the storage server stores data after data masking,and the blockchain ensures the traceability of query transactions.The need for precise privacy data is achieved by constructing a dictionary.Cryptographic techniques such as AES and RSA are used for encrypted storage of data,keywords,and digital signatures.Security analysis and performance evaluation shows that the availability,high efficiency,and privacy-preserving can be achieved.Meanwhile,this scheme has better robustness compared to other educational records data sharing models. | Zihan Li Zhaofeng Ma | 2021 | China Communications2021，18，6： | 2 |
| 16 | Comparisons between Movement Speed of Main Types of Dunes:A Case Study of Desert Areas in Hexi Region of Gansu Province显示文摘In desert areas in Hexi region,11 barchan dunes,6 chains of barchan dunes,6 pyramid dunes,6 parabolic dunes and 6 accumulated sand-belts were chosen to study their movement speed based on images obtained by Google Earth in various periods.The results show that among the dunes,the movement of the barchan dunes was the fastest,followed by the chains of barchan dunes,and only the tops of the pyramid dunes swayed,while the parabolic dunes and accumulated sand-belts hardly moved forward.The higher the barchan dunes(or the chains of barchan dunes) were,the slower the movement was.On the contrary,the higher the pyramid dunes were,the faster the swing was.There was a positive correlation between the movement speed of the barchan dunes and the average wind speed of sandstorms. | CHANG Zhaofeng ZHU Shujuan SHI Xuegang ZHANG Jinhu LI Ya WANG Qi ZHANG Dekui DUAN Xiaofeng | 2016 | Journal of Landscape Research2016，8，6： | 2 |
| 17 | Bioorganic & Medicinal Chemistry Letters 显示文摘 | Yiming Li Jing Shi Zhaofeng Luo | 2009 | 19' 5368-53712009，19，： | 1 |
| 18 | A sulfur–carbon composite for lithium/sulfur battery based on activated vapor-grown carbon fiber显示文摘 | Zhaofeng Deng Zhian Zhang Yanqing Lai Jin Liu Yexiang Liu Jie Li | 2013 | Solid State Ionics2013，，： | 1 |
| 19 | Glass wool prepared under various rotating speed by centrifugalspinneret-blow process显示文摘 | Li Binbin Chen Zhaofeng Chen Zhou | 2012 | Advanced Materials Research2012，，457458： | 1 |
| 20 | Imitation of Fabric Flagging in the Wind with 1/F~β Noise显示文摘This paper presents a dynamic simulation model,based on noise,to simulate fabric flagging in the wind.The wind noise is generated by two sine functions defined in advance.The frequencies and amplitudes of these sine functions are change- able to presenting the basic model of the fabric.In order to obtain more fabric fluctuant effect,we adopt a cosine function to achieve the fabric dynamic display effect.In the actual process,the traditional Phong illumination model is improved.Therefore, the model of simulating fabric flagging in the wind can be built successfully.Comparison with the physical model shows that it is a fast arithmetic because of adopting a new model in stead of the time consuming iteration arithmetic.It can achieve a friendly de- sign interface and an ideal simulation effect.Designers can select wind force and fabric material by controlling different parame- ters.The basic characteristics of fabric swaying in the wind are simulated efficiently and displayed vividly. | LI Beibei ZHAO Zhihong GENG Zhaofeng (Information Institute,DongHua University,Shanghai 200051,China, | 2006 | 武汉理工大学学报2006，28，S2： | 1 |
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