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| 1 | Chemical characteristics of fine particles and their impact on visibility impairment in Shanghai based on a 1-year period observation显示文摘In this work, a one-year observation focusing on high time resolution characteristics of components in fine particles was conducted at an urban site in Shanghai. Contributions of different components on visibility impairment were also studied. Our research indicates that the major components of PM_(2.5) in Shanghai are water-soluble inorganic ions and carbonaceous aerosol, accounting for about 60% and 30% respectively. Higher concentrations of sulfate(SO42-) and organic carbon(OC) in PM_(2.5) occurred in fall and summer, while higher concentrations of nitrate(NO_3^-) were observed in winter and spring. The mass concentrations of Cl^- and K^+ were higher in winter. Moreover, NO_3^- increased significantly during PM_(2.5) pollution episodes. The high values observed for the sulfate oxidizing rate(SOR), nitrate oxidizing rate(NOR) and secondary organic carbon(SOC) in OC indicate that photochemical reactions were quite active in Shanghai. The IMPROVE(Interagency Monitoring of Protected Visual Environments) formula was used in this study to investigate the contributions of individual PM_(2.5) chemical components to the light extinction efficient in Shanghai. Both NH_4NO_3 and(NH_4)_2SO_4 had close relationships with visibility impairment in Shanghai. Our results show that the reduction of anthropogenic SO_2, NO_x and NH_3 would have a significant effect on the improvement of air quality and visibility in Shanghai. | Min Zhou Liping Qiao Shuhui Zhu Li Li Shengrong Lou Hongli Wang Qian Wang Shikang Tao Cheng Huang Changhong Chen | 2016 | Journal of Environmental Sciences2016，28，10： | 22 |
| 2 | Magnetic iron oxide nanoparticles accelerate osteogenic differentiation of mesenchymal stem cells via modulation of long noncoding RNA INZEB2显示文摘Nanomaterials 逐渐地为生物医学的应用被使用;因此,理解他们的生物效果是重要的。以前的研究建议磁性的氧化铁 nanoparticles (IONP ) 有修理织物的效果。在现在的学习,我们在间充质的干细胞(MSC ) 探索了 IONP 的细胞的效果并且识别了内在的分子的机制。结果证明我们的同样准备的 IONP 是在 MSC 的在结构上马厩并且支持了 MSC 同样整个的粒子的 osteogenic 区别。而且在分子的水平,我们把 MSC 的基因表示与或没有 IONP 暴露作比较并且长显示出那 IONP upregulated noncoding RNA INZEB2,它为由 MSC 维持成骨不可缺少。而且, INZEB2 downregulated ZEB2 的 overexpression,必要的一个因素镇压 BMP/Smad-dependent osteogenic 抄写。我们也证明在 osteogenic 区别的 INZEB2 的必要角色是 ZEB2 依赖的。在摘要,我们阐明了 MSC 上的 IONP 效果的分子的基础;这些调查结果可以为干细胞的应用用作一个有意义的理论基础到再生药。 | Qiwei Wang Bo Chen Fang Ma Shikang Lin Meng Cao Yan Li Ning Gu | 2017 | Nano Research2017，10，2： | 11 |
| 3 | Pressure and Temperature Feasibility of NCEP/NCAR Reanalysis Data at Mt.Everest显示文摘Mt.Everest (27°54' N,86°54' E),the highest peak,is often referred to as the earth's 'third' pole,at an elevation of 8844.43 m. Due to the difficult logistics in the extreme high elevation regions over the Himalayas,observational meteorological data are very few on Mt. Everest. In 2005,an automatic weather station was operated at the East Rongbuk glacier Col of Mt. Everest over the Himalayas. The observational data have been compared with the reanalysis data from the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR),and the reliability of NCEP/NCAR reanalysis data has been investigated in the Himalayan region,after the reanalyzed data were interpolated in the horizontal to the location of Mt. Everest and in the vertical to the height of the observed sites. The reanalysis data can capture much of the synoptic-scale variability in temperature and pressure,although the reanalysis values are systematically lower than the observation. Furthermore,most of the variability magnitude is,to some degree,underestimated. In addition,the variation extracted from the NCEP/NCAR reanalyzed pressure and temperature prominently appears one-day lead to that from the observational data,which is more important from the standpoint of improving the safety of climbers who attempt to climb Mt. Everest peak. | XIE Aihong REN Jiawen QIN Xiang KANG Shikang | 2008 | Journal of Mountain Science2008，5，1： | 1 |
| 4 | Generating heralded single photons with a switchable orbital angular momentum mode显示文摘The orbital angular momentum(OAM) carried by photons defines an infinitely dimensional discrete Hilbert space. With OAM modes, high-dimensional quantum states can be achieved for quantum communication and cryptography. Here we demonstrate a heralded single-photon source with a switchable OAM mode, which consists of a heralded single-photon source and an integrated OAM emitter as the mode converter. As the first step, the heralded single-photon source is based on the dispersion-shifted fiber. In this work, the OAM mode(quantized by topological charge l) carried by the heralded single photon(at fixed wavelength of 1555.75 nm) can be switched within the range of l=3–7 while the mode purity is more than 80%. | SHAN ZHANG SHIKANG LI XUE FENG KAIYU CUI FANG LIU WEI ZHANG YIDONG HUANG | 2021 | Photonics Research2021，9，9： | 1 |
| 5 | A new colorimetric chemosensor for Hg 2+ based on coumarin azine derivative显示文摘 | Ruilong Sheng Pengfei Wang Weimin Liu Xiaohua Wu Shikang Wu | 2007 | Sensors & Actuators: B Chemical2007，，2： | 1 |
| 6 | Wet chemical synthesis of Ag nanowires array at room temperature显示文摘 | Ju Weigang Zhang Xiaohong Wu Shikang | 2005 | Chemistry Letters2005，34，4： | 1 |
| 7 | A quan- tum theory of an RLC circuit with a source显示文摘 | Zhang Zhiming He Linsheng Zhou Shikang | 1998 | Physics Letters A1998，244，4： | 1 |
| 8 | Chemiluminescence of NI(b^1∑^+ →X^3∑^- ) transition in active nitrogen reaction with aliphatic iodine compounds显示文摘 | TANG Xiaoshuan WANG Hongmei CHU Yannan ZHANG Weijun ZHOU Shikang | 2006 | Chemical Physics Letter2006，423，13： | 1 |
| 9 | Biological characteristics and conservation genetics of the narrowly distributed rare plant Cinnamomum chago(Lauraceae)显示文摘Cinnamomum chago(family Lauraceae) is an essential source of timber and oil.This plant is narrowly distributed in the western part of the Yunnan Province.In this study,the distribution,habitat,and biological characteristics of C.chago were examined through field investigation.The genetic diversity and the variation of the remnant populations were also studied using the inter-simple sequence repeat technique.Results showed that C.chago is mainly distributed in the upstream tributary mountains of Lancang River in Yunlong County of Yunnan Province.The species distribution exhibited a fragmented pattern with five isolated populations and high-frequency anthropogenic interference.A combination of morphological features(opposite leaves,pinnate leaf veins,absence of glandular fossa,large drupe,small punch,and pollen surface with triangular spike grain,with cushion bumps at the base) indicated that C.chago is a key phylogenetic taxon between the two sections of Asian Cinnamomum plants(Sect.Camphora(Trew) Meissn.and Sect.Cinnamomum).Analysis of the genetic diversity of C.chago indicated that it has a moderately high level of genetic diversity at the population and species levels(populations level:N_e = 1.629,H = 0.348,1= 0.504,and PPB = 83.3%;species level:N_e = 1.864,H = 0.460,1 = 0.652,and PPB = 100%).Analysis of molecular variance revealed that 17%of the genetic variation was divided between the populations,whereas 83%was observed within the populations.Based on these results,we suggest the inclusion of C.chago in the Wild Plants with Extremely Small Populations in China.Moreover,the species should be given special attention and protection.Some strategies were proposed for the conservation of the C.chago populations. | Wenjing Dong Xue Zhang Yang Guansong Liu Yang Yuehua Wang Shikang Shen | 2016 | Plant Diversity2016，38，5： | 1 |
| 10 | Functional polymers. LV. Photochemical behavior of 2(2-hydroxyphenyl)2H-benzotriazole derivatives显示文摘 | Yongcai Jiang Shikang Wu Andres Sustic Fu Xi Otto Vogl | 1988 | Polymer Bulletin1988，，2： | 1 |
| 11 | Responses in gross primary production of Stipa krylovii and Allium polyrhizum to a temporal rainfall in a temperate grassland of Inner Mongolia, China显示文摘In the arid and semi-arid areas of China, rainfall and drought affect the growth and photosynthetic activities of plants.Gross primary productivity(GPP) is one of the most important indices that measure the photosynthetic ability of plants.This paper focused on the GPP of two representative grassland species(Stipa krylovii Roshev.and Allium polyrhizum Turcz.ex Regel) to demonstrate the effect of a temporal rainfall on the two species.Our research was conducted in a temperate grassland in New Barag Right Banner, Hulun Buir City, Inner Mongolia Autonomous Region of China, in a dry year 2015.We measured net ecosystem productivity(NEP) and ecosystem respiration flux(ER) using a transparent chamber system and monitored the photosynthetically active radiation(PAR), air and soil temperature and humidity simultaneously.Based on the measured values of NEP and ER, we calculated the GPP of the two species before and after the rainfall.The saturated GPP per aboveground biomass(GPPAGB) of A.polyrhizum remarkably increased from 0.033(±0.018) to 0.185(±0.055) μmol CO2/(gdw·s) by 5.6-fold and that of S.krylovii decreased from 0.068(±0.021) to 0.034(±0.011) μmol CO2/(gdw·s) by 0.5-fold on the 1st and 2nd d after a 9.1 mm rainfall event compared to the values before the rainfall at low temperatures below 35℃.However, on the 1st and 2nd d after the rainfall, both of the saturated GPPAGB values of S.krylovii and A.polyrhizum were significantly lower at high temperatures above 35℃(0.018(±0.007) and 0.110(±0.061) μmol CO2/(gdw·s), respectively) than at low temperatures below 35℃(0.034(±0.011) and 0.185(±0.055) μmol CO2/(gdw·s), respectively).The results showed that the GPP responses to the temporal rainfall differed between S.krylovii and A.polyrhizum and strongly negative influenced by temperature.The temporal rainfall seems to be more effective on the GPP of A.polyrhizum than S.krylovii.These differences might be related to the different physiological and structural features, the coexistence of the species and their species-specific survival strategies. | HU Xiaoxing Mitsuru HIROTA Wuyunna Kiyokazu KAWADA LI Hao MENG Shikang Kenji TAMURA Takashi KAMIJO | 2019 | Journal of Arid Land2019，11，6： | 1 |
| 12 | Effects of Plant Community Type on Soil Methane Flux in Semiarid Loess Hilly Region,Central Gansu Province,China显示文摘Methane(CH_(4))is an important greenhouse gas second only to CO_(2)in terms of its greenhouse effect.Vegetation plays an important role in controlling soil CH_(4)fluxes,but the spatial variability of soil CH_(4)fluxes during vegetation restoration in Loess Hilly Region(LHR)is not fully understood.The effects of different plant community types[Medicago sativa grassland(MS);Xanthoceras sorbifolium forestland(XS);Caragana korshinskii bushland(CK);Hippophae rhamnoides shrubland(HR);and Stipa bungeana grassland(SB)]on soil CH_(4)flux in LHR were studied via the static chamber technique.The results showed that the five plant community types were sinks of soil CH_(4)in LHR,the plant community type significantly affected the soil CH_(4)flux,and the average CH_(4)uptake from high to low was in SB,HR,CK,MS,and XS.During the whole study period,the soil CH_(4)flux showed similar interannual variation.The maximum absorption of soil CH_(4)appeared in the growing season,while the minimum appeared in winter.Soil CH_(4)uptake was positively correlated with soil temperature and soil moisture.Soil temperature and moisture are important controlling factors for the temporal variability of soil CH_(4)flux.In LHR,the Stipa bungeana grassland is the more suitable plant community type for reducing soil CH_(4)emissions.In the process of vegetation restoration in LHR,the soil CH_(4)absorption potential of different plant community types should be considered,ecological benefits should be taken into account,and vegetation more suitable for mitigating the greenhouse effect should be selected. | Chuanjie YANG Guang LI Lijuan YAN Weiwei MA Jiangqi WU Yan TAN Shuainan LIU Shikang ZHANG | 2022 | Advances in Atmospheric Sciences2022，39，8： | 1 |
| 13 | A review and comparison of surface incident shortwave radiation from multiple data sources: satellite retrievals, reanalysis data and GCM simulations显示文摘Surface incident shortwave radiation(Rs)can promote the circulation of substance and energy,and the accuracy of its estimation is of great significance for climate studies.The Rs can be acquired from satellite retrievals,reanalysis predictions and general circulation model(GCM)simulations.Although Rs estimates have been evaluated and compared in previous studies,most of them focus on evaluating the Rs estimates over specific regions using ground measurements from limited stations.Therefore,it is essential to comprehensively validate Rs estimates from multiple data sources.In this study,ground measurements of 690 stations from BSRN,GEBA,CMA,GC-NET and buoys were employed to validate the Rs estimates from seven representative products(GLASS,GEWEX-SRB,CERES-EBAF,ERA5,MERRA2,CFSR and CMIP6).The validation results indicated that the selected products overestimated Rs globally,with biases ranged from 0.48 to 21.27 W/m^(2).The satellite retrievals showed relatively better accuracy among seven datasets compared to ground measurements at the selected stations.Moreover,the selected seven products were all in poor accuracy at high-latitude regions with RMSEs greater than 50 W/m^(2).The long-term variation trends were also analyzed in this study. | Shuyue Yang Xiaotong Zhang Shikang Guan Wenbo Zhao Yanjun Duan Yunjun Yao Kun Jia Bo Jiang | 2023 | International Journal of Digital Earth2023，16，1： | 1 |
| 14 | Programmable unitary operations for orbital angular momentum encoded states显示文摘We have proposed and demonstrated a scalable and efficient scheme for programmable unitary operations in orbital angular momentum(OAM)domain.Based on matrix decomposition into diagonal and Fourier factors,arbitrary matrix operators can be implemented only by diagonal matrices alternately acting on orbital angular momentum domain and azimuthal angle domain,which are linked by Fourier transform.With numerical simulations,unitary matrices with dimensionality of 3×3 are designed and discussed for OAM domain.Meanwhile,the parallelism of our proposed scheme is also presented with two 3×3 matrices.Furthermore,as an alternative to verify our proposal,proof of principle experiments have been performed on path domain with the same matrix decomposition method,in which an average fidelity of 0.97 is evaluated through 80 experimental results with dimensionality of 3×3. | Shikang Li Xue Feng Kaiyu Cui Fang Liu Wei Zhang Yidong Huang | 2022 | National Science Open2022，1，3： | 0 |
| 15 | Fracture features of brittle coal under uniaxial and cyclic compression loads显示文摘Under the efects of complex geological and stress environments,burst hazards continue to be a major challenge for underground space utilization and deep resources exploration as its occurrence can lead to personnel causalities,equipment damage and structural collapse.Considering the stress path experienced by in-situ coal body,cyclic loading appears in quite various forms for instance shearer cutting,overlying strata breakage,hydro-fracturing and blasting,during tunnel,mining and underground space utilizing process.The stability of the underground coal body subject to periodic loading/unloading stress is extremely important for maintain the function of designed engineering structure for waste storage,safe mining,roadway development,gas recovery,carbon sequestration and so on.The mechanical properties of hard rock subject to cyclic fatigue loads has been intensively investigated by many researchers as the rock burst induced by supercritical loads has long been a safety risk and engineering problems for civil and tunneling engineering under deep overburden.More recently,the mechanical properties of coal samples under cyclic fatigue loads is investigated from the aspect of hysteresis,energy dissipation and irreversible damage as the burst hazards of brittle coal is rising in many countries.However,the crack propagation and fracture pattern of brittle coal need more research to understand the micro mechanism of burst incubation subject to cyclic fatigue loads as brittle coal can store more elastic strain energy and rapidly release the energy when its ultimate strength once reached.This research studied the internal crack status corresponding to diferent cyclic fatigue loading stage of brittle coal samples.The AE monitoring was applied during the uniaxial and cyclic loading process of brittle coal samples to record the crack intensity of samples at diferent loading stages.The damage evolution curve corresponding to loading status was then determined.The fracture pattern of coal samples determined by micro-CT scan was observed and discussed.It has been found by this paper that brittle coal of uniaxial compression tests demonstrated sudden failure caused by major splitting fracture while that of cyclic fatigue tests experienced progressive failure with mixture fracture network. | Shikang Song Ting Ren Linming Dou Jian Sun Xiaohan Yang Lihai Tan | 2023 | International Journal of Coal Science & Technology2023，10，1： | 0 |
| 16 | Air tightness of compressed air storage energy caverns with polymer sealing layer subjected to various air pressures显示文摘During the operation of compressed air storage energy system,the rapid change of air pressure in a cavern will cause drastic changes in air density and permeability coefficient of sealing layer.To calculate and properly evaluate air tightness of polymer sealing caverns,the air-pressure-related air density and permeability must be considered.In this context,the high-pressure air penetration in the polymer sealing layer is studied in consideration of thermodynamic change of the cavern structure during the system operation.The air tightness model of compressed air storage energy caverns is then established.In the model,the permeability coefficient and air density of sealing layer vary with air pressure,and the effectiveness of the model is verified by field data in two test caverns.Finally,a compressed air storage energy cavern is taken as an example to understand the air tightness.The air leakage rate in the caverns is larger than that using air-pressure-independent permeability coefficient and air density,which is constant and small in the previous leakage rate calculation.Under the operating pressure of 4.5-10 MPa,the daily air leakage in the compressed air storage energy cavern of Yungang Mine with high polymer butyl rubber as the sealing material is 0.62%,which can meet the sealing requirements of compressed air storage energy caverns.The air tightness of the polymer sealing cavern is mainly affected by the cavern operating pressure,injected air temperature,cavern radius,and sealing layer thickness.The cavern air leakage rate will be decreased to reduce the cavern operating pressure the injection air temperature,or the cavern radius and sealing layer thickness will be increased. | Shikang Qin Caichu Xia Shuwei Zhou | 2023 | Journal of Rock Mechanics and Geotechnical Engineering2023，15，8： | 0 |
| 17 | Knowledge graph quality control:A survey显示文摘A knowledge graph(KG),a special form of semantic network,integrates fragmentary data into a graph to support knowledge processing and reasoning.KG quality control is important to the utility of KGs.It is essential to investigate KG quality and the parameters influencing KG quality to better understand its quality control.Although many works have been conducted to evaluate the dimensions of KG quality,quality control of the construction process,and enhancement methods for quality,a comprehensive literature review has not been presented on this topic.This paper intends to fill this research gap by presenting a comprehensive survey on the quality control of KGs.First,this paper defines six main evaluation dimensions of KG quality and investigates their correlations and differences.Second,quality control treatments during KG construction are introduced from the perspective of these dimensions of KG quality.Third,the quality enhancement of a constructed KG is described from various dimensions.This paper ultimately aims to promote the research and applications of KGs. | Xiangyu Wang Lyuzhou Chen Taiyu Ban Muhammad Usman Yifeng Guan Shikang Liu Tianhao Wu Huanhuan Chen | 2021 | Fundamental Research2021，1，5： | 0 |
| 18 | Morphological evolution and flow conduction characteristics of fracture channels in fractured sandstone under cyclic loading and unloading显示文摘In coal mining,rock strata are fractured under cyclic loading and unloading to form fracture channels.Fracture channels are the main flow narrows for gas.Therefore,expounding the flow conductivity of fracture channels in rocks on fluids is significant for gas flow in rock strata.In this regard,graded incremental cyclic loading and unloading experiments were conducted on sandstones with different initial stress levels.Then,the three-dimensional models for fracture channels in sandstones were established.Finally,the fracture channel percentages were used to reflect the flow conductivity of fracture channels.The study revealed how the particle size distribution of fractured sandstone affects the formation and expansion of fracture channels.It was found that a smaller proportion of large blocks and a higher proportion of small blocks after sandstone fails contribute more to the formation of fracture channels.The proportion of fracture channels in fractured rock can indicate the flow conductivity of those channels.When the proportion of fracture channels varies gently,fluids flow evenly through those channels.However,if the proportion of fracture channels varies significantly,it can greatly affect the flow rate of fluids.The research results contribute to revealing the morphological evolution and flow conductivity of fracture channels in sandstone and then provide a theoretical basis for clarifying the gas flow pattern in the rock strata of coal mines. | Quanle Zou Zihan Chen Jinfei Zhan Chunmei Chen Shikang Gao Fanjie Kong Xiaofeng Xia | 2023 | International Journal of Mining Science and Technology2023，33，12： | 0 |
| 19 | Single particle analysis of ambient aerosols in Shanghai during the World Exposition,2010:two case studies显示文摘ATSI Model 3800 aerosol time-of-flight mass spectrometer(ATOFMS)was deployed for single-particle analysis in Shanghai during theWorld Exposition(EXPO),2010.Measurements on two extreme cases:polluted day(1st May)and clean day(25th September)were compared to show how meteorological conditions affected the concentration and composition of ambient aerosols.Mass spectra of 90496 and 50407 particles were analyzed respectively during the two sampling periods.The ART-2a neural network algorithm was applied to sort the collected particles.Seven major classes of particles were obtained:dust,sea salt,industrial,biomass burning,organic carbon(OC),elementary carbon(EC),and NH4-rich particles.Number concentration of ambient aerosols showed a strong anti-correlation with the boundary layer height variation.The external mixing states of aerosols were quite different during two sampling periods because of different air parcel trajectories.Number fraction of biomass burning particles(43.3%)during polluted episode was much higher than that(21.6%)of clean time.Air parcels from the East China Sea on clean day diluted local pollutant concentration and increased the portion of sea salt particle dramatically(13.3%).The large contribution of biomass burning particles in both cases might be an indication of a constant regional background of biomass burning emission.Mass spectrum analysis showed that chemical compositions and internal mixing states of almost all the particle types were more complicate during polluted episode compared with those observed in clean time.Strong nitrate signals in the mass spectra suggested that most of the particles collected on polluted day had gone through some aging processes before reaching the sampling site. | Shikang TAO Xinning WANG Hong CHEN Xin YANG Mei LI Lei LI Zhen ZHOU | 2011 | Frontiers of Environmental Science & Engineering2011，5，3： | 0 |
| 20 | A specific fluorescent chemosensor for copper(Ⅱ)cation recognition显示文摘The fluorescent spectra of 2, 6-bis(benzimidazol-2-yl) pyridine (compound 2) and its N-substituted compound (1) are studied. The fluorescent characteristics of these compounds and the complexes formed from these compounds with different metal ionshave also been investigated. The results show that compound 1 possesses a specific ability to form complex with Cu2+ ions, but compound2 has not such a property. It is proposed that the specific recognition ability of compound 1 to Cu^2+ may attribute to the cyclic configura-tion of this compound in polar solvent. | ZHOU Lili, ZHANG Xiaohong and WU Shikang(Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, China) | 2003 | Progress in Natural Science:Materials International2003，13，3： | 0 |
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