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1Comparison of Chlorophyll and Photosynthesis Parameters of Floating and Attached Ulva prolifera显示文摘In mid-May 2008 a serious green tide caused mainly by floating Ulva prolifera(Mller) J.Agardh(Chlorophyta,Ulvales) thalli struck the coastal area of Qingdao,China.To understand the present physiological conditions of the floating alga,in this work both laboratory and field investigations were conducted on the floating U.prolifera thalli in comparison with the attached U.prolifera thalli collected from the area.The floating thalli of three distinctively different colors and attached thalli at three different stages of sporangium formation process were characterized under a microscope,while their photosynthetic parameters were determined with chlorophyll fluorescence technology.On the other hand,the sporangium formation status of the floating U.prolifera thalli was surveyed both in the laboratory and in the field.Comparisons showed that both of the paired morphological characteristics and the paired physiological parameters of the floating and attached U.prolifera thalli were consistent.Furthermore,some spores were confirmed in the field and some motile particles were found within the floating thalli.These results suggest that the floating U.prolifera thalli with different colors could be at different stages of sporangium formation.However,our results also showed that the floating alga thalli have only a limited reproductive potential.This might limit the duration and the further geographic expansion of the green algal bloom.Apeng Lin Songdong Shen Guangce Wang Qianqian Yi Hongjin Qiao Jianfeng Niu Guanghua Pan 2011Journal of Integrative Plant Biology2011,53,1:20
2Attribution of PM_(2.5) exposure in Beijing-Tianjin-Hebei region to emissions:implication to control strategies显示文摘The Beijing-Tianjin-Hebei(BTH) region is one of the most heavily polluted regions in China,with both high PM_(2.5) concentrations and a high population density.A quantitative source-receptor relationship can provide valuable insights that can inform effective emission control strategies.Both source apportionment(SA) and source sensitivity(SS) can provide such information from different perspectives.In this study,both methods are applied in northern China to identify the most significant emission categories and source regions for PM_(2.5) exposure in BTH in 2013.Despite their differences,both models show similar distribution patterns for population and simulated PM_(2.5) concentrations,resulting in overall high PM_(2.5) exposure values(approximately 110 μg/m~) and particularly high exposure values during the winter(approximately 200 μ/m~).Both methods show that local emissions play a dominant role(70%),with some contribution from surrounding provinces(e.g.,Shandong) via regional transport.The two methods also agree on the priority of local emission controls:both identify industrial,residential,and agricultural emissions as the top three categories that should be controlled locally.In addition,the effect of controlling agricultural ammonia emissions is approximately doubled when the co-benefits of reducing nitrate are considered.The synthesis of SA and SS for addressing specific categories of emissions provides a quantitative basis for the development of emission control strategies and policies for controlling PM_(2.5)in China.Xin Li Qiang Zhang Yang Zhang Lin Zhang Yuxuan Wang Qianqian Zhang Meng Li Yixuan Zheng Guannan Geng Timothy J.Wallington Weijian Han Wei Shen Kebin He 2017Science Bulletin2017,62,13:15
3The unconformity in Miocene sequence of western Qaidam Basin and its tectonic significance显示文摘An angular unconformity has been identified between the upper and the lower Youshashan Formation based on the study of the regional geology, drillhole, and geophysical data of the Altyn Tagh Mountain foreland, western Qaidam Basin. The distribution of the unconformity, the contacts between the upper and the lower Youshashan Formation, and its relation to the characteristics of the paleo-structure belts suggest a close relationship between the unconformities in the southern flank of the Altyn Tagh Mountain in the west of the Qaidam Basin and the activity of the Altyn Tagh Fault. It was the same time when the Atlyn Tagh Fault Zone was transformed from regional uplifting to rapid-strike-slipping movement during the Miocene, resulting in the cessation of the regional uplift and subsequent massive regional transgression during the deposition of the upper Youshashan Formation, which unconformably overlies (onlaps) the underlying strata of different ages.WANG Liang XIAO AnCheng GONG QingLin LIU Dong WU Lei ZHOU SuPing SHEN ZhongYan LOU QianQian SUN XiaoWen 2010Science China Earth Sciences2010,53,8:10
4Triboelectric–Electromagnetic Hybrid Generator for Harvesting Blue Energy显示文摘Progress has been developed in harvesting lowfrequency and irregular blue energy using a triboelectric–electromagnetic hybrid generator in recent years. However,the design of the high-efficiency, mechanically durable hybrid structure is still challenging. In this study, we report a fully packaged triboelectric–electromagnetic hybrid generator(TEHG), in which magnets were utilized as the trigger to drive contact–separation-mode triboelectric nanogenerators(CS-TENGs) and coupled with copper coils to operate rotary freestanding-mode electromagnetic generators(RF-EMGs). The magnet pairs that produce attraction were used to transfer the external mechanical energy to the CS-TENGs, and packaging of the CS-TENGpart was achieved to protect it from the ambient environment. Under a rotatory speed of 100 rpm, the CS-TENGs enabled the TEHG to deliver an output voltage, current,and average power of 315.8 V, 44.6 μA, and ~ 90.7 μW,and the output of the RF-EMGs was 0.59 V, 1.78 m A, and 79.6 μW, respectively. The cylinder-like structure made the TEHG more easily driven by water flow and demonstrated to work as a practical power source to charge commercial capacitors. It can charge a 33μF capacitor from 0 to 2.1 V in 84 s, and the stored energy in the capacitor can drive an electronic thermometer and form a self-powered water-temperature sensing system.Huiyun Shao Ping Cheng Ruixuan Chen Lingjie Xie Na Sun Qingqing Shen Xiaoping Chen Qianqian Zhu Yi Zhang Yina Liu Zhen Wen Xuhui Sun 2018Nano-Micro Letters2018,10,3:9
5Performance and microbial diversity of an expanded granular sludge bed reactor for high sulfate and nitrate waste brine treatment显示文摘The disposal of waste brines has become a major challenge that hinders the wide application of ionexchange resins in the water industry in recent decades. In this study, high sulfate removal efficiency(80%–90%) was achieved at the influent sulfate concentration of 3600 mg/L and 3% NaCl after 145 days in an expanded granular sludge bed(EGSB) reactor. Furthermore, the feasibility of treating synthetic waste brine containing high levels of sulfate and nitrate was investigated in a single EGSB reactor during an operation period of 261 days. The highest nitrate and sulfate loading rate reached 6.38 and 5.78 kg/(m3·day) at SO2-4-S/NO-3-N mass ratio of 4/3, and the corresponding removal efficiency was 99.97% and 82.26% at 3% NaCl, respectively. Meanwhile, 454-pyrosequencing technology was used to analyze the bacterial diversity of the sludge on the 240th day for stable operation of phase X. Results showed that a total of 9194 sequences were obtained, which could be affiliated to 14 phyla, including Proteobacteria, Firmicutes, Chlorobi, Bacteroidetes, Synergistetes and so on. Proteobacteria(77.66%) was the dominant microbial population, followed by Firmicutes(12.23%) and Chlorobi(2.71%).Runhua Liao Yan Li Xuemin Yu Peng Shi Zhu Wang Ke Shen Qianqian Shi Yu Miao Wentao Li Aimin Li 2014Journal of Environmental Sciences2014,26,4:7
6Subsistence strategies of prehistoric hunter-gatherers on the Tibetan Plateau during the Last Deglaciation显示文摘The study of prehistoric hunter-gatherer subsistence strategies on the Tibetan Plateau is important for understanding the mechanisms and processes of human adaption to high altitude environments.But to date,only a few Paleolithic sites have been found on the Tibetan Plateau with clear stratigraphy and reliable dating.These sites are mainly distributed in the Qinghai Lake Basin on the northeastern part of the plateau,and the sporadic fauna and flora remains excavated provide limited information about the subsistence strategies of hunter-gatherers.In 2014,relatively abundant animal remains were unearthed in the Lower Cultural Layer (LCL,15400-13100 cal yr BP) of the'151 site'located in the Qinghai Lake Basin,providing important information about human subsistence strategies on the Tibetan Plateau during the Last Deglaciation.Zooarchaeological analysis of these faunal remains indicates that hunter-gatherers at the'151 site'mainly targeted large ungulates of Bos and wild horse/ass,and only brought back the most nutritious parts of animal carcasses including upper and intermediate limb bones,heads,and trunks (ribs and vertebrae).People then processed and consumed the carcasses around single hearths.Our comprehensive analyses of contemporaneous sites in the Qinghai Lake Basin show that a subsistence strategy involving opportunistic hunting of ungulates,high mobility,and short occupation of campsites was used by terminal Pleistocene huntergatherers to adapt to the high-altitude environment on the Tibetan Plateau.This subsistence strategy may have been a first step of gradual hunter-gatherer adaptation to the extreme conditions on the Tibetan Plateau after the Last Glacial Maximum,and laid the foundation for the widespread distribution of hunter-gatherers on the plateau during the Holocene.Jian WANG Huan XIA Juanting YAO Xuke SHEN Ting CHENG Qianqian WANG Dongju ZHANG 2020Science China Earth Sciences2020,63,3:5
7Trans-regional transmission of large-scale hydropower: problems and solutions in receiving power grid显示文摘Large-capacity hydropower transmission from southwestern China to load centers via ultra-high voltage direct current(UHVDC) or ultra-high voltage alternating current(UHVAC) transmission lines is an important measure of the accommodation of large-scale hydropower in China. The East China Grid(ECG) is the main hydropower receiver of the west–east power transmission channel in China. Moreover, it has been subject to a rapidly increasing rate of hydropower integration over the past decade. Currently, large-scale outer hydropower is one of the primary ECG power sources. However, the integration of rapidly increasing outer hydropower into the power grid is subject to a series of severe drawbacks. Therefore, this study considered the load demands and hydropower transmission characteristics for the analysis of several major problems and the determination of appropriate solutions. The power supply-demand balance problem, hydropower transmission schedule problem, and peakshaving problem were considered in this study. Correspondingly, three solutions are suggested in this paper, which include coordination between the outer hydropower and local power sources, an inter-provincial power complementary operation, and the introduction of a market mechanism. The findings of this study can serve as a basis to ensure that the ECG effectively receives an increased amount of outer hydropower in the future.Jianyu Lu Jianjian Shen Chengguo Su Qianqian Shen 2019Global Energy Interconnection2019,2,4:4
8Research Progress of Active Ingredients and Pharmacological Action of Honeysuckle显示文摘Honeysuckle,the dry flower bud or with open flower of Lonicera japonica in caprifoliaceae,has been touted as a cure-all for heat-clearing and detoxifying effect.Honeysuckle contains abundant components such as volatile oil,flavonoids and organic acids,playing the role of antibiosis,antivirus,antiphlogosis,immunopotentiation and antioxidation.The active ingredients and pharmacological action of honeysuckle are reviewed in the paper,so as to lay the foundation for further application of honeysuckle in veterinary clinic.Zhang Zhimei Guo Shijin Fu Shijun Xu Qianqian Yang Limei Zhang Ying Wang Yanping Ma Li Wang Jianjun Shen Zhiqiang 2014Animal Husbandry and Feed Science2014,6,1:4
9Effects of Shuanghuanglian Propolis Oral Liquid on Growth Performance,Slaughter Performance and Meat Quality of Broilers显示文摘[Objective] The paper was to investigate the effects of adding Shuanghuanglian propolis oral liquid in drinking water on growth performance,slaughter performance and meat quality of broilers. [Method]Ninety one-day-old broilers were randomly divided into three groups( group Ⅰ,group Ⅱ and group Ⅲ) : group Ⅰ was the control group,and groups Ⅱ and Ⅲ were added 0. 5 and 1. 0 mL / L Shuanghuanglian propolis oral liquid in drinking water,respectively.[Result] Compared with broilers in group I,the average daily feed intakes of broilers in group Ⅱ and group Ⅲ were increased by 0. 86%( P > 0. 05) and 1. 10%( P > 0. 05),respectively; the average daily gains were increased by 2. 33%( P < 0. 05) and 4. 43%( P < 0. 05),respectively; the feed gain ratios were decreased by 1. 05%( P >0. 05) and 2. 63%( P <0. 05),respectively; the slaughter rates were increased by 0. 94%( P >0. 05) and 1. 70%( P <0. 05),respectively; the eviscerated rates were increased by 0. 52%( P > 0. 05) and 1. 15%( P > 0. 05),respectively; the semi-eviscerated rates were increased by 1. 51%( P < 0. 05) and 2.23%( P < 0. 05),respectively; the breast muscle rates were increased by 3. 77%( P < 0. 05) and 5. 51%( P < 0. 05),respectively; the leg muscle rates were increased by 1. 96%( P > 0. 05) and 4. 09%( P < 0. 05),respectively; the lightness( L*) were decreased by 0. 96%( P > 0. 05) and 1. 47%( P > 0. 05),respectively; the redness( a*) were increased by 1. 24%( P < 0. 05) and 1. 86%( P < 0. 05),respectively; the yellowness( b*) were decreased by 0. 44%( P >0. 05) and 1. 03%( P <0. 05),respectively; the drip losses were decreased by 1. 22%( P <0. 05) and 1. 56%( P <0. 05),respectively; the cooking losses were decreased by 1. 76%( P > 0. 05) and 2. 89%( P < 0. 05),respectively. [Conclusion]Adding 0. 5 and 1. 0 mL / L Shuanghuanglian propolis oral liquid in drinking water could improve growth performance,slaughter performance,meat quality of broilers,and the dose of 1. 0 mL / L is recommended in clinical application.Ma Li Yang Limei Shen Zhiqiang Wang Yanping Xu Qianqian Zhang Ying Guo Shijin 2016Animal Husbandry and Feed Science2016,8,4:4
10Activation of disease resistance against Botryosphaeria dothidea by downregulating the expression of MdSYP121 in apple显示文摘In plants,the vesicle fusion process plays a vital role in pathogen defence.However,the importance of the vesicle fusion process in apple ring rot has not been studied.Here,we isolated and characterised the apple syntaxin gene MdSYP121.Silencing the MdSYP121 gene in transgenic apple calli increased tolerance to Botryosphaeria dothidea infection;this increased tolerance was correlated with salicylic acid(SA)synthesis-related and signalling-related gene transcription.In contrast,overexpressing MdSYP121 in apple calli resulted in the opposite phenotypes.In addition,the results of RNA sequencing(RNA-Seq)and quantitative real-time PCR(qRT-PCR)assays suggested that MdSYP121 plays an important role in responses to oxidation–reduction reactions.Silencing MdSYP121 in apple calli enhanced the expression levels of reactive oxygen species(ROS)-related genes and the activity of ROS-related enzymes.The enhanced defence response status in MdSYP121-RNAi lines suggests that syntaxins are involved in the defence response to B.dothidea.More importantly,we showed that MdSYP121 forms a soluble N-ethylmaleimide-sensitive factor attachment protein receptor(SNARE)complex with MdSNAP33,and the complex may participate in regulating resistance to B.dothidea.In conclusion,by regulating the interaction of SA pathway and oxidation–reduction process,MdSYP121 can influence the pathogen infection process in apple.Xiaowen He Yanhong Huo Xiuxia Liu Qianqian Zhou Shouqian Feng Xiang Shen Baohua Li Shujing Wu Xuesen Chen 2018Horticulture Research2018,5,1:3
11Rice metabolic regulatory network spanning the entire life cycle显示文摘As one of the most important crops in the world,rice(Oryza sativa)is a model plant for metabolome research.Although many studies have focused on the analysis of specific tissues,the changes in metab-olite abundance across the entire life cycle have not yet been determined.In this study,combining both tar-geted and nontargeted metabolite profiling methods,a total of 825 annotated metabolites were quantified in rice samples from different tissues covering the entire life cycle.The contents of metabolites in different tissues of rice were significantly different,with various metabolites accumulating in the plumule and radicle during seed germination.Combining these data with transcriptome data obtained from the same time period,we constructed the Rice Metabolic Regulation Network.The metabolites and co-expressed genes were further divided into 12 clusters according to their accumulation patterns,with members within each cluster displaying a uniform and clear pattern of abundance across development.Using this dataset,we established a comprehensive metabolic profile of the rice life cycle and used two independent strategies to identify novel transcription factors-namely the use of known regulatory genes as bait to screen for new networks underlying lignin metabolism and the unbiased identification of new glycerophospholipid metabolism regulators on the basis of tissue specificity.This study thus demonstrates how guilt-by-association analysis of metabolome and transcriptome data spanning the entire life cycle in cereal crops provides novel resources and tools to aid in understanding the mechanisms underlying important agro-nomic traits.Chenkun Yang Shuangqian Shen Shen Zhou Yufei Li Yuyuan Mao Junjie Zhou Yuheng Shi Longxu An Qianqian Zhou Wenju Peng Yuanyuan Lyu Xuemei Liu Wei Chen Shouchuang Wang Lianghuan Qu Xianqing Liu Alisdair R.Fernie Jie Luo 2022Molecular Plant2022,15,2:3
12Microstructure and soft-magnetic properties of FeCoPCCu nanocrystalline alloys显示文摘Fe(83.2-x)CoxP(10)C6Cu(0.8)(x=0,4,6,8 and 10)alloys with a high amorphous-forming ability and good softmagnetic properties were successfully synthesized.Saturation magnetic flux density(Bs)is effectively enhanced from 1.53 T to 1.61 T for as-quenched alloy by minor Co addition,which is consistent well with the result of the linear relationship between average magnetic moment and magnetic valence.For Cocontained alloys,the value of corecivity(Hc)is mainly determined by magneto-crystalline anisotropy,while effective permeability(μe)is dominated by grain size and average saturation polarization.After proper heat treatment,the Fe(79.2)Co4P(10)C6Cu(0.8)nanocrystalline alloy exhibited excellent soft-magnetic properties including a high Bsof 1.8 T,a low Hcof 6.6 A/m and a highμeof 15,510,which is closely related to the high volume fraction of α-(Fe,Co)grains and refined uniform nanocrystalline microstructure.Long Hou Xingdu Fan Qianqian Wang Weiming Yang Baolong Shen 2019Journal of Materials Science & Technology2019,35,8:3
13Non-noble metal-based amorphous high-entropy oxides as efficient and reliable electrocatalysts for oxygen evolution reaction显示文摘Exploring high-performance and cost-effective electrocatalysts that are applicable in oxygen evolution reaction(OER)is crucial for water splitting and energy storage.In this work,a facile and scalable chemical reduction strategy is developed to synthesize FeCoNiPB non-noble metal-based amorphous high-entropy oxides for the OER in alkaline media.The FeCoNiPB oxides exhibit overpotentials of 235 and 306 mV at current densities of 10 and 100 mA/cm^(2),respectively,as well as a small Tafel slope of 53 mV/dec in 1.0 M KOH solution,outperforming the performance of FeCoPB,FeNiPB,and CoNiPB oxides and the commercial RuO_(2),while maintaining excellent stability with negligible overpotential amplification over 40 h.The superior OER electrocatalytic efficiency and stability of the FeCoNiPB catalyst is primarily attributed to its unique amorphous high-entropy nanostructure,synergistic effect of the multiple components,and in situ-formed amorphous sheets with a thin(FeCoNi)OOH crystalline layer on the edge during long-term OER.This work provides new insights to design and prepare low-cost,highly efficient,and durable OER electrocatalysts.Qianqian Wang Jiaqi Li Yongjie Li Genmiao Shao Zhe Jia Baolong Shen 2022Nano Research2022,15,10:2
14Synergistic effect of the metal-support interaction and interfacial oxygen vacancy for CO_(2) hydrogenation to methanol over Ni/In_(2)O_(3) catalyst:A theoretical study显示文摘Indium oxide supported nickel catalyst has been experimentally confirmed to be highly active for CO_(2) hydrogenation towards methanol.In this work,the reaction mechanism for CO_(2) hydrogenation to methanol has been investigated on a model Ni/In_(2)O_(3) catalyst,i.e.,Ni_(4)/In_(2)O_(3),via the density functional theory(DFT)study.Three possible reaction pathways,i.e.,the formate pathway,CO hydrogenation and the reverse water-gas-shift(RWGS)pathways,have been examined on this model catalyst.It has been demonstrated that the RWGS pathway is the most theoretically-favored for CO_(2) hydrogenation to methanol.The complete RWGS pathway follows CO_(2)+6 H→COOH+5 H→CO+H_(2)O+4 H→HCO+H_(2)O+3 H→H_(2)CO+H_(2)O+2 H→H_(3)CO+H_(2)O+H→H_(3)COH+H_(2) O.Furthermore,it has been also proved that the interfacial oxygen vacancy can serve as the active site for boosting the CO_(2) adsorption and charge transfer between the nickel species and indium oxide,which synergistically promotes the consecutive CO_(2) hydrogenation towards methanol.Chenyang Shen Qianqian Bao Wenjuan Xue Kaihang Sun Zhitao Zhang Xinyu Jia Donghai Mei Chang-jun Liu 2022Journal of Energy Chemistry2022,31,2:2
15Determination of Berberine Hydrochloride Content in Qingwen Baidu Granule by HPLC显示文摘The paper was to establish a simple and sensitive HPLC method for determination of berberine hydrochloride content in Qingwen Baidu granule.The HPLC system consisted of Stable Bond- C18 column(4.6×150 mm,5μm) and with a mobile phase of acetonitrile- 0.05mol / L potassium dihydrogen phosphate solution(50∶50,v∶v) mixture.Berberine hydrochloride was detected at the wavelength of 345 nm,with a flow rate of 1.0 mL / min and a column temperature of30 ℃.The excipients and solvents in the granule could be well separated from the drug under such a designated chromatogram condition and did not interfere with the assay.A good linear relationship was found between peak area and the concentration of berberine hydrochloride in the range of 16.0- 48.0 μg / mL.The average recovery of berberine hydrochloride was 99.09%.The established approach was specific,accurate,reliable,prompt,sensitive and applicable,and could be used to control the quality of Qingwen Baidu granule.Guo Shijin Wang Yanping Fu Shijun Zhang Zhimei Xu Qianqian Shen Zhiqiang 2014Animal Husbandry and Feed Science2014,6,1:2
16Natural Polyphenol Inspired Polycatechols for Efficient siRNA Delivery显示文摘There is a continuing quest to rationally fabricate polymeric biomaterials with both high transfection efficiency and minimal toxicity for the emerging opportunities in small interfering RNA(siRNA)delivery.Recently,this goal was promoted highly by developing a robust and efficient strategy to facilitate polymer-mediated RNAi using natural polyphenols with multiple phenol groups that could condense siRNA effectively into negatively charged nanoparticles(NPs).Further coating of these NPs with cationic polymers of low molecular weight enabled their intracellular siRNA delivery.Inspired by the structural and functional features of natural polyphenols,we aimed to further the development of low molecular weight polycatechols as a new class of efficient and biocompatible polymers for siRNA delivery in our current study.The fabricated polycatechols have benefits of requiring only one-step fabrication toward efficient siRNA nanoformulations.Moreover,they could deliver siRNA into cells and silence target genes both in vitro and in vivo.The resulting polycatechol/siRNA formulations were also functionally competent,demonstrating a successful,profound downregulation of a proinflammatory enzyme to attenuate chronic intestinal inflammation in an intestinal injury model.This study provides a new approach in chemistry for the development of efficient synthetic polymers for therapeutic siRNA delivery.Wanwan Shen Ruojun Wang Qianqian Fan Xiao Gao Hui Wang Yang Shen Yiwen Li Yiyun Cheng 2020CCS Chemistry2020,2,3:1
17Enhanced dye degradation capability and reusability of Fe-based amorphous ribbons by surface activation显示文摘The dye degradation capability and reusability of FeSiBNbCu amorphous ribbons are largely enhanced due to the surface activation by ball milling.The time required for degrading 50%of acid orange 7 solution by the activated FeSiBNbCu amorphous ribbons is only 1/6 of that by the as-quenched ribbons,while the reusable times of the activated ribbons is 6 times larger than that of the as-quenched ribbons.The superior degradation capability and better reusability of the activated FeSiBNbCu amorphous ribbons come from not only the uneven topography of the ribbon surface induced by ball milling,but also the stored deformation energy,including the structural rejuvenation and the enlarged residual stress.The structural rejuvenation in the activated FeSiBNbCu amorphous ribbons is verified by heat relaxation analysis,and the increased residual stress is confirmed by the magnetic domain measurements on the ribbon surfaces.Besides,the environmental adaptability of the activated FeSiBNbCu amorphous ribbons is also investigated.The possible pathways for degradation of acid orange 7 using the activated ribbons,including azo bond cleavage and hydroxylation of benzene ring,are proposed.This work provides a new method to effectively improve the degradation performance of amorphous ribbons.Fang Miao Qianqian Wang Siyi Di Lu Yun Jing Zhou Baolong Shen 2020Journal of Materials Science & Technology2020,52,18:1
18Prevalence, Phenotype, and Genotype of Enterococcus faecalis Isolated from Saliva and Root Canals in Patients with Persistent Apical Periodontitis显示文摘Xiaofei Zhu Qianqian Wang Chengfei Zhang Gary S.P. Cheung Ya Shen 2010Journal of Endodontics2010,,12:1
19Secondary solar heat gain modelling of spectral-selective glazing based on dynamic solar radiation spectrum显示文摘The secondary solar heat gain,defined as the heat flows from glazing to indoor environment through longwave radiation and convection,grows with the increasing of glazing absorption.With the rapid development and application of spectrally selective glazing,the secondary solar heat gain becomes the main way of glazing heat transfer and biggest proportion,and indicates it should not be simplified calculated conventionally.Therefore,a dynamic secondary solar heat gain model is developed with electrochromic glazing system in this study,taking into account with three key aspects,namely,optical model,heat transfer model,and outdoor radiation spectrum.Compared with the traditional K-Sc model,this new model is verified by on-site experimental measurements with dynamic outdoor spectrum and temperature.The verification results show that the root mean square errors of the interior and exterior glass surface temperature are 3.25°C and 3.33°C,respectively,and the relative error is less than 10.37%.The root mean square error of the secondary heat gain is 13.15 W/m2,and the dynamic maximum relative error is only 13.2%.The simulated and measured results have a good agreement.In addition,the new model is further extended to reveal the variation characteristics of secondary solar heat gain under different application conditions(including orientations,locations,EC film thicknesses and weather conditions).In summary,based on the outdoor spectrum and window spectral characteristics,the new model can accurately calculate the increasing secondary solar heat gain in real time,caused by spectrally selective windows,and will provide a computational basis for the evaluation and development of spectrally selective glazing materials.Peng Xue Yi Shen Sheng Ye Jinqing Peng Yanyun Zhang Qianqian Zhang Yuying Sun 2023Building Simulation2023,16,12:1
20A sparsity adaptive compressed signal reconstruction based on sensing dictionary显示文摘Signal reconstruction is a significantly important theoretical issue for compressed sensing.Considering the situation of signal reconstruction with unknown sparsity,the conventional signal reconstruction algorithms usually perform low accuracy.In this work,a sparsity adaptive signal reconstruction algorithm using sensing dictionary is proposed to achieve a lower reconstruction error.The sparsity estimation method is combined with the construction of the support set based on sensing dictionary.Using the adaptive sparsity method,an iterative signal reconstruction algorithm is proposed.The sufficient conditions for the exact signal reconstruction of the algorithm also is proved by theory.According to a series of simulations,the results show that the proposed method has higher precision compared with other state-of-the-art signal reconstruction algorithms especially in a high compression ratio scenarios.SHEN Zhiyuan WANG Qianqian CHENG Xinmiao 2021Journal of Systems Engineering and Electronics2021,32,6:1
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