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| 1 | Object-based classification approach for greenhouse mapping using Landsat-8 imagery显示文摘Suburban greenhouses with intensive agricultural productivity have increasingly influenced the daily diet and vegetable supply in Chinese cities.With their enormous input of fertilizers and pesticides,greenhouses have considerably changed the local soil quality and environmental risk factors.The ability to obtain timely and accurate information regarding the spatial distribution of greenhouses could make an important contribution to local agricultural management and soil protection.This paper attempts to present a practical framework for extracting suburban greenhouses,integrating remote sensing data from Landsat-8 and object-oriented classification.Inheritance classification was implemented,and various properties,including texture and neighborhood features in addition to spectral information,were investigated through the popular random forest technique for feature selection prior to SVM classification to improve the mapping accuracy.The results demonstrated that object-based classification incorporating non-spectral features yielded a significant improvement compared with the classification results obtained using only the spectral information in traditional per-pixel classification.Both the producer’s and user’s accuracy were higher than 85%for greenhouse identification.Although it remained a challenge to completely distinguish greenhouses from sparse plants,the final greenhouse map indicated that the proposed object-based classification scheme,providing multiple feature selections and multi-scale analysis,yielded worthwhile information when applied to a continuous series of the freely available Landsat-8 imagery data. | Wu Chaofan Deng Jinsong Wang Ke Ma Ligang Amir Reza Shah Tahmassebi | 2016 | International Journal of Agricultural and Biological Engineering2016，9，1： | 7 |
| 2 | Light absorption properties and potential sources of brown carbon in Fenwei Plain during winter 2018–2019显示文摘A distinctive kind of organic carbon aerosol that could absorb ultraviolet-visible radiation is called brown carbon(Br C),which has an important positive influence on radiative budget and climate change.In this work,we reported the absorption properties and potential source of Br C based on a seven-wavelength aethalometer in the winter of 2018–2019 at an urban site of Sanmenxia in Fenwei Plain in central China.Specifically,the mean value of Br C absorption coefficient was 59.6±36.0 Mm^(-1) at 370 nm and contributed 37.7%to total absorption,which made a significant impact on visibility and regional environment.Absorption coefficients of Br C showed double-peak pattern,and Br C had shown small fluctuations under haze days compared with clean days.As for the sources of Br C,Br C absorption coefficients expressed strong correlations with element carbon aerosols and primary organic carbon aerosols,indicating that most of Br C originated from primary emissions.The linear correlations between trace metal elements(K,As,Fe,Mn,Zn,and Pb)and Br C absorption coefficients further referred that the major sources of Br C were primary emissions,like coal burning,biomass burning,and vehicle emissions.The moderate relationship between Br C absorption coefficients and secondary organic aerosols suggested that secondary production of Br C also played an important role.The 120 hr backward air mass trajectories analysis and concentration-weighted trajectories analysis were also used to investigate potential sources of Br C in and around this area,which inferred most parts of Br C were derived from local emissions. | Wenyu Zhang Weigang Wang Jie Li Shuangliang Ma Chaofan Lian Kun Li Bo Shi Mingyuan Liu Yanyu Li QingQing Wang Yele Sun Shengrui Tong Maofa Ge | 2021 | Journal of Environmental Sciences2021，33，4： | 6 |
| 3 | A Post-domestication Mutation, Dt2, Triggers Systemic Modification of Divergent and Convergent Pathways Modulating Multiple Agronomic Traits in Soybean显示文摘The semi-determinate stem growth habit in leguminous crops,similar to the“green revolution”semi-dwarf trait in cereals,is a key plant architecture trait that affects several other traits determining grain yield.In soybean semi-determinacy is modulated by a post-domestication gain-of-function mutation in the gene,Dt2,which encodes an MADS-box transcription factor.However,its role in systemic modification of stem growth and other traits is unknown.In this study,we show that Dt2 functions not only as a direct repressor of Dt1,which prevents terminal flowering,but also as a direct activator of putative floral integrator/identity genes including GmSOC1,GmAP1,and GmFUL,which likely promote flowering.We also demonstrate that Dt2 functions as a direct repressor of the putative drought-responsive transcription factor gene GmDREB1D,and as a direct activator of GmSPCH and GmGRP7,which are potentially associated with asymmetric division of young epidermal cells and stomatal opening,respectively,and may affect the plant's water-use efficiency(WUE).Intriguingly,Dt2 was found to be a direct activator or repressor of the precursors of eight microRNAs targeting genes potentially associated with meristem maintenance,flowering time,stomatal density,WUE,and/or stress responses.This study thus reveals the molecular basis of pleiotropy associated with plant productivity,adaptability,and environmental resilience. | Dajian Zhang Xutong Wang Shuo Li Chaofan Wang Michael JGosney Michael VMickelbart Jianxin Ma | 2019 | Molecular Plant2019，12，10： | 4 |
| 4 | Continuous and comprehensive atmospheric observations in Beijing:a station to understand the complex urban atmospheric environment显示文摘Due to profound impact on climate and human health,air quality has attracted attention from all levels of the civil society.The key step in the provision of required tools for the society to tackle the complex air quality problem is to characterize it in a comprehensive manner with a long-term perspective.Here,we describe a continuous and comprehensive observation station and its accompanying state-ofthe-art instrumentation that was established to investigate the complex urban atmospheric environment in a rapidly developing Chinese Megacity.The station,located in downtown Beijing,aims to study air quality by identifying the major atmospheric pollutants and key processes determining their formation and loss mechanisms.A few hundreds of parameters are continuously measured with the state-of-the-art instruments,including trace gas concentrations,aerosol particle size distributions,and mass concentrations,covering aerosol particle chemical composition from molecules to micrometer-sized aerosol particles.This produced long-term,comprehensive big data with around 1�10^(11)bytes per year.In this paper,we provide an overview on the facilities of the station,the instrumentation used,the workflow of continuous observations and examples of results from 2018 to 2019 and a basis for establishing a modern long-term,comprehensive atmospheric urban observation station in other megacities. | Yongchun Liu Chao Yan Zemin Feng Feixue Zheng Xiaolong Fan Yusheng Zhang Chang Li Ying Zhou Zhuohui Lin Yishou Guo Ying Zhang Li Ma Wenshuo Zhou Zhikun Liu Lubna Dada Kaspar Dallenbach Jenni Kontkanen Runlong Cai Tommy Chan Biwu Chu Wei Du Lei Yao Yonghong Wang Jing Cai Juha Kangasluoma Tom Kokkonen Joni Kujansuu Anton Rusanen Chenjuan Deng Yueyun Fu Rujing Yin Xiaoxiao Li Yiqun Lu Yiliang Liu Chaofan Lian Dongsen Yang Weigang Wang Maofa Ge Yuesi Wang Douglas R.Worsnop Heikki Junninen Hong He Veli-Matti Kerminen Jun Zheng Lin Wang Jingkun Jiang Tuukka Petaja Federico Bianchi Markku Kulmala | 2020 | Big Earth Data2020，4，3： | 3 |
| 5 | Beclin-1/LC3-II dependent macroautophagy was uninfluenced in ischemia-challenged vascular endothelial cells显示文摘Autophagy has been extensively studied and occurs in many biological settings.However,a question remains as to whether ischemia enhances Beclin-1/LC3-II-dependent macroautophagy in vascular endothelial cells,as has been previously thought.Furthermore,the effect of the level of autophagy on cell or skin flap survival still requires elucidation.We created a lethal ischemia model in human umbilical vascular endothelial cells(HUVECs),performed quantitative proteomics and bioinformatics analyses,and verified the autophagic status and effect both in vitro and in vivo.The significantly upregulated proteins encoded by autophagy-related genes(ATGs)included ATG2A,ATG3,ATG4B,ATG5,ATG7,ATG9A,ATG12,ATG16,and ATG101.The significantly enhanced lysosomal proteins were cathepsin B,cathepsin D,lysosome-associated membrane protein 1(LAMP1),and LAMP2.However,the differentially expressed proteins excluded Beclin-1,microtubule-associated protein light chain 3(LC3)-I,and LC3-II.Western blot analyses verified that the protein expression levels of Beclin-1,LC3-I,and LC3-II were neither upregulated nor downregulated in ischemia-challenged HUVECs.The autophagic status was not enhanced by rapamycin in ischemic HUVECs but appeared to be inhibited by chloroquine.Our in vivo study on rats showed that a downregulation in autophagic status jeopardized skin flap survival.In conclusion,Ischemia neither enhanced nor inhibited Beclin-1/LC3-II-dependent canonical macroautophagy both in vitro and in vivo,in contradiction to previous studies.An appropriate autophagic homeostasis can minimize cell or skin flap damage. | Yaping Ma Chaofan Li Yan He Tiwei Fu Li Song Qingsong Ye Fugui Zhang | 2022 | Genes & Diseases2022，9，2： | 3 |
| 6 | Micro/nano-mechanical behaviors of individual FCC,BCC and FCC/BCC interphase in a high-entropy alloy显示文摘Here,a systematic investigation was made on the interphase strengthening effects induced superior me-chanical performances of multiphase high-entropy alloys(HEAs)at micro/nano-scale,compared with sin-gle phase HEAs.A pillar compression test under a scanning electron microscope(SEM)was performed on the individual face centered cubic(FCC),body centered cubic(BCC),and mixed-phases with different di-ameters in a Fe_(24)Co_(25)Ni_(24)Cr_(23)Al_(4)HEA using focused ion beam(FIB)milling and a nanoindenter equipped with a flat punch.The stress-strain response of pillar underneath the indenter was selected to explore the diameter/phase-dependent size effect,the periodically fluctuation of local stress,and strain hardening.It was revealed that the pillars at the interphase exhibited significantly higher strength,compared with the FCC and BCC pillars.An experiment also verified the coincident mechanical size effects independent with the type of phases.The stress responses in the mixed-phase pillars manifested as a distinct transition from the dramatic drop to the minor fluctuation during the post-yield stages with the increasing strain,indicating the propagation of Al-Ni enriched solid solution phase(BCC1)under compression.Except the BCC1 phase,numerous dislocations were observed in the post-deformed pillars,particularly serving as the major source to enhance the strain hardening of BCC pillars. | Wei Zhang Zhichao Ma Chaofan Li Chaowei Guo Dongni Liu Hongwei Zhao Luquan Ren | 2022 | Journal of Materials Science & Technology2022，，19： | 1 |
| 7 | Combining radiation and the ATR inhibitor berzosertib activates STING signaling and enhances immunotherapy via inhibiting SHP1 function in colorectal cancer显示文摘Background:Immune checkpoint inhibitors(ICIs)targeting programmed cell death protein 1(PD-1)and programmed death-ligand 1(PD-L1)have shown a moderate response in colorectal cancer(CRC)with deficient mismatch repair(dMMR)functions and poor response in patients with proficientMMR(pMMR).pMMRtumors are generally immunogenically“cold”,emphasizing combination strategies to turn the“cold”tumor“hot”to enhance the efficacy of ICIs.ATR inhibitors(ATRi)have been proven to cooperate with radiation to promote antitumor immunity,but it is unclear whether ATRi could facilitate the efficacy of IR and ICI combinations in CRCs.This study aimed to investigate the efficacy of combining ATRi,irradiation(IR),and anti-PD-L1 antibodies in CRC mouse models with different microsatellite statuses.Methods:The efficacy of combining ATRi,IR,and anti-PD-L1 antibodies was evaluated in CRC tumors.The tumor microenvironment and transcriptome signatures were investigated under different treatment regimens.The mechanisms were explored via cell viability assay,flow cytometry,immunofluorescence,immunoblotting,co-immunoprecipitation,and real-time quantitative PCR in multiple murine and human CRC cell lines.Results:Combining ATRi berzosertib and IR enhanced CD8+T cell infiltration and enhanced the efficacy of anti-PD-L1 therapy in mouse CRC models with different microsatellite statuses.The mechanistic study demonstrated that IR+ATRi could activate both the canonical cGAS-STING-pTBK1/pIRF3 axis by increasing cytosolic double-stranded DNA levels and the non-canonical STING signaling by attenuating SHP1-mediated inhibition of the TRAF6-STINGp65 axis,via promoting SUMOylation of SHP1 at lysine 127.By boosting the STING signaling,IR+ATRi induced type I interferon-related gene expression and strong innate immune activation and reinvigorated the cold tumor microenvironment,thus facilitating immunotherapy.Conclusions:The combination of ATRi and IR could facilitate anti-PD-L1 therapy by promoting STING signaling in CRC models with different microsatellite statuses.The new combination strategy raised by our study isworth investigating in the management of CRC. | Chaofan Liu Xi Wang Wan Qin Jingyao Tu Chunya Li Weiheng Zhao Li Ma Bo Liu Hong Qiu Xianglin Yuan | 2023 | Cancer Communications2023，43，4： | 1 |
| 8 | Studies on the liquid-liquid interfacial mass transfer process using holographic interferometry显示文摘This paper aims at the interfacial phenomena of liquid-liquid mass transfer and its characteristic.By using the real-time holographic technique,the concen-tration distributions on the aqueous side were obtained according to holographic diagrams of mass transfer of ethanol through the interface of oil and water at different initial concentrations.Furthermore,the concentrations near the interface and the mass transfer coefficients were attained.A correlation of concentration near the interface to the concentration of the solute in the oil side was proposed.An approach of interfacial energy with solute concentration was established,and the calculated results are at good agreement with the experimental data.It is indicated that the liquid-liquid mass transfer process is approximately in accordance with two-film theory,the interfacial performance may be changed by the addition of the solute,and the interface of liquid-liquid is non-equilibrium thermodynamically during the mass transfer process. | Chaofan ZHAO Youguang MA Chunying ZHU | 2008 | Frontiers of Chemical Science and Engineering2008，2，1： | 0 |
| 9 | 边缘计算能否结束数据流的带宽之争?显示文摘带宽之争通常起源于数据拥堵的四个常见原因:多个设备之间的数据差异、数据阻塞现象、缺少隔离引起的数据安全性问题以及可靠性不高。本文将研究边缘计算如何解决这些问题并结束带宽之争。随着互联设备、装置以及家电设备数量的激增,网络中充斥着越来越多的不兼容数据。比如在一栋房子里面,除了平板电脑、个人电脑(PC)、智能手机和汽车之外,还有媒体中心和音响系统、气候控制系统、家用电器、健康监视器、互动设备(如Alexa)等消费类互联设备,所有这些都将网络压力推向了极限。 | Bin Jiang Chaofan Ma Huifang Xu Houbing Song | 2019 | 中国集成电路2019，28，7： | 0 |
| 10 | Will the Globe Encounter the Warmest Winter after the Hottest Summer in 2023?显示文摘In the boreal summer and autumn of 2023,the globe experienced an extremely hot period across both oceans and continents.The consecutive record-breaking mean surface temperature has caused many to speculate upon how the global temperature will evolve in the coming 2023/24 boreal winter.In this report,as shown in the multi-model ensemble mean(MME)prediction released by the Institute of Atmospheric Physics at the Chinese Academy of Sciences,a medium-to-strong eastern Pacific El Niño event will reach its mature phase in the following 2−3 months,which tends to excite an anomalous anticyclone over the western North Pacific and the Pacific-North American teleconnection,thus serving to modulate the winter climate in East Asia and North America.Despite some uncertainty due to unpredictable internal atmospheric variability,the global mean surface temperature(GMST)in the 2023/24 winter will likely be the warmest in recorded history as a consequence of both the El Niño event and the long-term global warming trend.Specifically,the middle and low latitudes of Eurasia are expected to experience an anomalously warm winter,and the surface air temperature anomaly in China will likely exceed 2.4 standard deviations above climatology and subsequently be recorded as the warmest winter since 1991.Moreover,the necessary early warnings are still reliable in the timely updated mediumterm numerical weather forecasts and sub-seasonal-to-seasonal prediction. | Fei ZHENG Shuai HU Jiehua MA Lin WANG Kexin LI Bo WU Qing BAO Jingbei PENG Chaofan LI Haifeng ZONG Yao YAO Baoqiang TIAN Hong CHEN Xianmei LANG Fangxing FAN Xiao DONG Yanling ZHAN Tao ZHU Tianjun ZHOU Jiang ZHU | 2024 | Advances in Atmospheric Sciences2024，41，4： | 0 |
| 11 | Application and development of ground source heat pump technology in China显示文摘Ground source heat pumps (GSHPs) are one of the renewable energy technologies with features of high efficiency, energy saving, economic feasibility and environmental protection. In China, GSHPs have been widely used for building heating and cooling in recent years, and have shown great potential for future energy development. This paper summarizes the classification, development history, and use status of shallow GSHPs. Several typical engineering cases of GSHP technology are also specified and analyzed. Finally, promising development trends and some advanced technologies are illustrated. | Chaofan Song Yang Li Taha Rajeh Ling Ma Jun Zhao Wenjia Li | 2021 | Protection and Control of Modern Power Systems2021，6，1： | 0 |
| 12 | A Prediction Mode of Crop Canopy Nitrogen Hyperspectral Under Mode of 'Cornfield Goose Breeding'显示文摘The corn canopy taking in before and after grazing term in the production mode of'cornfield goose'was used as the research object.Hyperspectral techniques were used to analyze the spectral characteristics of corn canopy leaves in different periods,and a full-band based Principal Component Regression model,Partial Least Squares Regression model and Support Vector Machine regression model were established to propose a fast,convenient and efficient hyperspectral imaging detection technique.The results showed that the nitrogen value of the grazing area was always lower than that of the control area,during the grazing period,the reflectance of the near-infrared spectrum increased,and the red edge position moved to the left.In terms of model establishment,the optimal model was obtained for different grazing periods.The positive set determining coefficient(Rc 2),the root-mean-square error correction(RMSEC),the prediction set decision coefficient(Rp 2)and the root-mean-square error prediction(RMSEP)were obtained by using SNV-BICA-PCA-PLS in the pre-grazing period.Their values were 0.9136,0.1750,0.8910 and 0.1052,respectively.The values of Rc 2,RMSEC,Rp 2 and RMSEP were 0.9006,0.0418,0.8508 and 0.1233,respectively,when they were obtained by using MSC-BICA-PCA-MSC in the post-grazing period.The research results provided support and help for the future'agriculture and animal husbandry integration'to optimize production management and establish a nitrogen nutrient balance model. | Wang Shu-wen Ma Xin-yu Guo Chun-fei Guo Yong-gang Zhang Yan Zhao Zhong-yuan Wang Chaofan Chen Xiao-liang Liu Jun Li Rui-xuan Li Si-jia Xu kun Gao Jia-ying Wang Run-tao | 2019 | Journal of Northeast Agricultural University(English Edition)2019，26，2： | 0 |
| 13 | Cache-Enabled in Cooperative Cognitive Radio Networks for Transmission Performance显示文摘The proliferation of mobile devices that support the acceleration of data services(especially smartphones)has resulted in a dramatic increase in mobile traffic. Mobile data also increased exponentially, already exceeding the throughput of the backhaul. To improve spectrum utilization and increase mobile network traffic, in combination with content caching, we study the cooperation between primary and secondary networks via content caching. We consider that the secondary base station assists the primary user by pre-caching some popular primary contents.Thus, the secondary base station can obtain more licensed bandwidth to serve its own user. We mainly focus on the time delay from the backhaul link to the secondary base station. First, in terms of the content caching and the transmission strategies, we provide a cooperation scheme to maximize the secondary user’s effective data transmission rates under the constraint of the primary users target rate. Then, we investigate the impact of the caching allocation and prove that the formulated problem is a concave problem with regard to the caching capacity allocation for any given power allocation. Furthermore, we obtain the joint caching and power allocation by an effective bisection search algorithm. Finally, our results show that the content caching cooperation scheme can achieve significant performance gain for the primary and secondary systems over the traditional two-hop relay cooperation without caching. | Jiachen Yang Chaofan Ma Jiabao Man Huifang Xu Gan Zheng Houbing Song | 2020 | Tsinghua Science and Technology2020，25，1： | 0 |
| 14 | Modified Coffin-Manson equation to predict the fatigue life of structural materials subjected to mechanical-thermal coupling non-coaxial loading显示文摘With regard to the structures subjected to severe mechanical-thermal coupling fatigue conditions,the consistency between service conditions and loading conditions was the prerequisite for the fatigue prop-erties test and fatigue life prediction.A miniature piezoelectric-driven instrument integrating with a tripodal piezoelectric actuator and envelope-type heating function was developed to investigate the mechanical-thermal coupling fatigue properties and obtain the fatigue life of materials under approximate service conditions.A physical model was described to quantitatively calculate the alternating deformation under the mechanical-thermal coupling tensile-bending combined condition.Accordingly,a fatigue life prediction method based on the Coffin-Manson equation under tensile-bending combined loading was proposed to estimate the mechanical-thermal coupling fatigue life in terms of the total coupling defor-mation and plastic strain amplitude.The feasibility of the proposed instrument was verified through the analysis of displacement responses of high entropy alloy specimens under the thermal-mechanical cou-pling tensile-bending combined condition at temperatures ranging from RT to 600°C.The comparison between fatigue lives directly measured through thermal-mechanical coupling experiments and theoreti-cally predicted fatigue lives indicated the availability of the modified Coffin-Manson equation. | Zhichao Ma Chaofan Li Wei Zhang Shenghui Wang Jiakai Li Hongwei Zhao Luquan Ren | 2023 | Journal of Materials Science & Technology2023，，29： | 0 |
| 15 | Modified iron-molybdate catalysts with various metal oxides by a mechanochemical method:enhanced formaldehyde yield in methanol partial oxidation显示文摘A mechanochemical method was employed to prepare modified iron molybdate catalysts with various metal salts as precursors.The physicochemical properties of the iron molybdate catalysts were characterized,and their performances in catalyzing the reaction from methanol to formaldehyde(HCHO)were evaluated.Iron molybdate catalysts doped with Co(NO_(3))_(2)·6H_(2)Oand Al(NO_(3))_(3)·9H_(2)O resulted in high HCHO yields.Compared with a commercial catalyst,the HCHO yields in the reaction with the modified catalyst at an optimal Co/Mo molar ratio reached 97.37%.According to chemical state analysis,the formation of CoO and the efficient decrease in the MoO_(3)sublimation rate could be important factors enhancing the HCHO yield in reactions catalyzed with iron molybdate doped with different Co/Mo mole ratios. | Xue Liu Lingtao Kong Shengtao Xu Chaofan Liu Fengyun Ma | 2021 | Frontiers of Chemical Science and Engineering2021，15，5： | 0 |
| 16 | Ultrasensitive methyl salicylate gas sensing determined by Pd-doped SnO_(2)显示文摘Efficient chemicalwarfare agents(CWAs)detection is required to protect people from the cWAs in war and terrorism.In this work,a Pd-doped SnO_(2)nanoparticles-based gas sensor was developed to detect a nerve agent simulant named methyl salicylate.The sensing measurements of methyl salicylate under different Pd doping amounts found that the 0.5 at.%Pd-doped SnO_(2)exhibited a significant improvement in the detection of methyl salicylate at the ppb(1ppb=10-9)level,and the response value to 160 ppb methyl salicylate is 0.72 at 250℃.Compared with the pure SnO_(2),the response value is increased by 4.5 times,which could be attributed to the influence of the noble metal Pd on the oxygen state and its catalytic effect.In addition,the 0.5at.%Pd-doped SnO_(2)sensor still has an obvious response to 16ppb methyl salicylate with a response value of 0.13,indicating the lower detection limit of the sensor. | Chaoqi ZHU Xiang LI Xiaoxia WANG Huiyu SU Chaofan MA Xiang GUO Changsheng XIE Dawen ZENG | 2022 | Frontiers of Materials Science2022，16，4： | 0 |
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