检索结果-南通市图书馆

Transition metal-nitrogen sites for electrochemical carbon dioxide reduction reaction

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Catalysis 2019年第1期40卷 23-37页

作者： Chengcheng Yan long lin Guoxiong Wang Xinhe Bao State Key Laboratory of Catalysis CAS Center for Excellence in NanoscienceDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

Electrochemical CO2 reduction reaction(CO2RR)powered by renewable electricity has emerged as the most promising technique for CO2 conversion,making it possible to realize a carbon‐neutral *** efficient,robust,and cost‐effective catalysts are highly demanded for the near‐future practical applications of *** studies on atomically dispersed metal‐nitrogen(M‐Nx)sites constituted of earth abundant elements with maximum atom‐utilization efficiency have demonstrated their performance towards *** review summarizes recent advances on a variety of M‐Nx sites‐containing transition metal‐centered macrocyclic complexes,metal organic frameworks,and M‐Nx‐doped carbon materials for efficient CO2RR,including both experimental and theoretical *** roles of metal centers,coordinated ligands,and conductive supports on the intrinsic activity and selectivity,together with the importance of reaction conditions for improved performance are *** mechanisms of CO2RR over these M‐Nx‐containing materials are presented to provide useful guidance for the rational design of efficient catalysts towards CO2RR.

关键词： Electrochemical carbon dioxide reduction reaction Metal‐nitrogen sites Metal‐nitrogen containing macrocyclic complexes Metal organic frameworks Zeolitic imidazolate frameworks Carbon material doped with metal‐nitrogen sites

An Improved Atmospheric Vector Radiative Transfer Model Incorporating Rough Ocean Boundaries

在线全文

学校读者我要写书评

暂无评论

Atmospheric and Oceanic Science Letters 2010年第3期3卷 139-144页

作者： Fan Xue-Hua Chen Hong-Bin Han Zhi-Gang lin long-Fu Key Laboratory of Middle Atmosphere and Global Environment Observation (LAGEO) Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Beijing Institute of Applied Meteorology Beijing 100029 China

The radiative transfer model (RT3), a vector radiative transfer (VRT) scheme in a plane-parallel atmosphere, was bounded by a rough ocean surface in this study. The boundary problem was solved using a Fourier series decomposition of the radiation field as a function of the azimuth. For the case of a rough ocean surface, the decomposition was obtained by developing both the Fresnel reflection matrix and the probability distribution of the water facet orientation as Fourier series. The effect of shadowing by ocean surface waves was also considered in the boundary condition. The VRT model can compute the intensity and degree of polarization of the light at the top of the atmosphere (TOA), the ocean surface, and any level of the atmosphere in the ocean-atmosphere system. The results obtained by our model are in good agreement with those computed by Ahmad’s model. The simulated results showed that the shadow effects of wave facets on the intensity and the degree of polarization are negligible except at the ocean surface near the grazing angle, possibly because we did not consider the effect of white caps.

关键词： vector radiative transfer rough ocean fresnel reflection matrix wave facet distribution function

Differences in taste characteristics and antioxidant properties of four substitute teas based on a targeted metabolomics approach

在线全文

学校读者我要写书评

暂无评论

Beverage Plant Research 2023年第1期3卷 312-321页

作者： Zhongying Liu Qiansong Ran Congjun Yuan Shimao Fang Ke Pan lin long Guizhou Tea Research Institute Guiyang 550006China Guizhou Agricultural Vocational College Qingzhen 551400China Guizhou Academy of Forestry Science Guiyang 550011China Guizhou Guitianxia Tea Group Co.LTD Guiyang 550001China

To investigate the differences in taste characteristics and antioxidant properties of four types of tea *** sensory review and electronic tongue indicated that the taste characteristics of the four substitute teas were sweetness,bitterness and *** were a total of 136 flavonoid metabolites in 12 categories and 12 sugar metabolites were identified in the four substitute teas with ultra-performance liquid chromatography tandem-mass spectrometry metabolomics targeted *** were significantly positively correlated with antioxidant properties,among them,15 were positively associated with clearing ABTS radicals and five were positively associated with clearing DPPH radicals,and sugars were significantly negatively correlated with antioxidant *** antioxidant properties were in the following order:TC>KD>LY>*** conclusion is that significant differences in the content of flavonoids and sugar metabolites are the main reasons for the formation of the flavour characteristics and antioxidant differences of the four substitute teas.

关键词： targeted sugar substitute

GPU based numerical simulation of core shooting process

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Foundry 2017年第5期14卷 392-397页

作者： Yi-zhong Zhang Gao-chun Lu Chang-jiang Ni Tao Jing lin-long Yang Qin-fang Wu School of Materials Science and Engineering Tsinghua University Beijing 100084 China Suzhou Mingzhi Technology Co. Ltd.Suzhou 215217China

Core shooting process is the most widely used technique to make sand cores and it plays an important role in the quality of sand cores. Although numerical simulation can hopefully optimize the core shooting process, research on numerical simulation of the core shooting process is very limited. Based on a two-fluid model(TFM) and a kinetic-friction constitutive correlation, a program for 3D numerical simulation of the core shooting process has been developed and achieved good agreements with in-situ experiments. To match the needs of engineering applications, a graphics processing unit(GPU) has also been used to improve the calculation efficiency. The parallel algorithm based on the Compute Unified Device Architecture(CUDA) platform can significantly decrease computing time by multi-threaded GPU. In this work, the program accelerated by CUDA parallelization method was developed and the accuracy of the calculations was ensured by comparing with in-situ experimental results photographed by a high-speed camera. The design and optimization of the parallel algorithm were discussed. The simulation result of a sand core test-piece indicated the improvement of the calculation efficiency by GPU. The developed program has also been validated by in-situ experiments with a transparent core-box, a high-speed camera, and a pressure measuring system. The computing time of the parallel program was reduced by nearly 95% while the simulation result was still quite consistent with experimental data. The GPU parallelization method can successfully solve the problem of low computational efficiency of the 3D sand shooting simulation program, and thus the developed GPU program is appropriate for engineering applications.

关键词： graphics processing unit (GPU) Compute Unified Device Architecture (CUDA) parallelization core shooting process

Decrease of GSK3βSer-9 Phosphorylation Induced Osteoblast Apoptosis in Rat Osteoarthritis Model

在线全文

学校读者我要写书评

暂无评论

Current Medical Science 2019年第1期39卷 75-80页

作者： Shuang DENG Zhi-gang NIE Pu-ji PENG Yang LIU Sai XING lin-sheng long Hao PENG Department of Orthopedics Renmin Hospital of Wuhan UniversityWuhan 430060China

Nowadays,the cumulative intake of glucocorticoids has become the most common pathogenic factor for non-traumatic osteonecrosis of the femoral head(ONFH).Apoptosis of osteoblasts is considered as the main reason of ONFH at the molecular *** synthase kinase 3β(GSK3β)is an important regulator of cellular differentiation and apoptosis pathway,which can modulate the balance between osteoblasts and *** studies have reported about its function in osteoporosis,but little is known about it in *** our study,lipopolysaccharide and methylprednisolone were utilized to establish a rat ONFH *** phosphorylation of GSK3βSer-9 was decreased in the *** blotting examination ofβ-catenin,Bcl-2,Bax and caspase-3 revealed that the osteoblasts were *** dexamethasone(Dex)-incubated primary osteoblasts,the expression profile of GSK3βphosphorylation and apoptotic factors were consistent with those in the rat ONFH *** further investigate the regulation of osteonecrosis caused by GSK3β,the expression and function of GSK3βwere inhibited in Dex-incubated primary *** knockdown of GSK3βby siRNA decreased the expression of Bax and cleaved caspase-3,but increased Bcl-2 andβ-*** the other hand,selective inhibition of GSK3βfunction by LiCl counteracted the activation of caspase-3 induced by *** work is the first study about the GSK3P phosphorylation in ONFH,and provides evidence for further therapeutic methods.

关键词： osteonecrosis of the femoral head GSK3β phosphorylation apoptosis dexamethasone

Study on psychological resilience and associated influencing factors in lung cancer patients with bone metastases

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Psychiatry 2024年第9期14卷 1326-1334页

作者： Chao-Fan Guo Li-Li Wu Zhong-Zhong Peng Hua-long lin Jie-Ni Feng Department of Orthopedics The Third Affiliated Hospital of Wenzhou Medical UniversityWenzhou 325200Zhejiang ProvinceChina Department of Medical Oncology The Third Affiliated Hospital of Wenzhou Medical UniversityWenzhou 325200Zhejiang ProvinceChina Department of Medical Oncology Ningbo Hangzhou Bay HospitalNingbo 315336Zhejiang ProvinceChina

BACKGROUND Evaluating the psychological resilience of lung cancer(LC)patients helps understand their mental state and guides future ***,there is limited research on the psychological resilience of LC patients with bone *** To explore the psychological resilience of LC patients with bone metastases and identify factors that may influence psychological *** LC patients with bone metastases who met the inclusion criteria were screened from those admitted to the Third Affiliated Hospital of Wenzhou Medical *** psychological scores of the enrolled patients were *** were then grouped based on the mean psychological score:Those with scores lower than the mean value were placed in the low-score group and those with scores equal to or greater than the mean value was placed in the high-score *** baseline data(age,gender,education level,marital status,residence,monthly income,and religious beliefs),along with self-efficacy and medical coping mode scores,were *** This study included 142 LC patients with bone metastases admitted to our hospital from June 2022 to December 2023,with an average psychological resilience score of 63.24±9.96 *** grouping,the low-score group consisted of 69 patients,including 42 males and 27 females,with an average age of 67.38±9.55 *** high-score group consisted of 73 patients,including 49 males and 24 females,with a mean age of 61.97±5.00 years.χ2 analysis revealed significant differences between the two groups in education level(χ2=6.604,P=0.037),residence(χ2=12.950,P=0.002),monthly income(χ2=9.375,P=0.009),and medical coping modes(χ2=19.150,P=0.000).Independent sample t-test showed that the high-score group had significantly higher self-efficacy scores(t=3.383,P=0.001)and lower age than the low-score group(t=4.256,P<0.001).Furthermore,multivariate logistic regression hazard analysis confirmed that self-efficacy is an independent protective factor for psy

关键词： Lung cancer Bone metastases Psychological resilience Influencing factors Clinical evaluation

First identification of two co-existing genome-wide significant sex quantitative trait loci(QTL) in red tilapia using integrative QTL mapping

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Zoological Research 2022年第2期43卷 205-216页

作者： Zong-Xian Zhu Yi-long lin Chun-Hui Ai Ying-Ying Xiong Dan-Dan Huang Yin-Yi Yao Tong-De Liu Chao-Hao Chen Hao-Ran lin Jun-Hong Xia College of Life Sciences State Key Laboratory of BiocontrolInstitute of Aquatic Economic Animals and Guangdong Provincial Key Laboratory for Aquatic Economic AnimalsSun Yat-Sen UniversityGuangzhouGuangdong 510275China College of Traditional Chinese Medicine Guangdong Pharmaceutical UniversityGuangzhouGuangdong 510006China Maoming Branch Guangdong Laboratory for Lingnan Modern AgricultureMaomingGuangdong 525000China

Red tilapia(Oreochromis spp.)is one of the most popular fish in China due to its bright red appearance,fast growth rate,and strong *** the sex determination mechanisms is of vital importance for the selection of all-male lines to increase aquacultural production of red *** this research,the genetic architecture for sex from four mapping populations(n=1090)of red tilapia was analyzed by quantitative trait loci(QTL)-seq,linkage-based QTL mapping,and linkage disequilibrium(LD)-based genome-wide association *** genome-wide significant QTL intervals associated with sex were identified on ChrLG1(22.4-23.9 Mb)and ChrLG23(32.0-35.9 Mb),*** QTL on ChrLG1 was detected in family 1(FAM1),FAM2,and FAM4,and the other QTL on ChrLG23 was detected in FAM3 and *** microsatellite markers located within the QTL were successfully developed for marker-assisted ***,three(Ipp,sox14,and amh)of the 12 candidate genes located near or on the two QTL intervals were abundantly expressed in males,while the remaining genes were more highly expressed in *** genes(scly,ube3a,Ipp,gpr17,oca2,cog4,and atp10a)were significantly differentially expressed between the male and female ***,LD block analysis suggested that a cluster of genes on ChrLG23 may participate in regulating sex development in red *** study provides important information on the genetic architecture of sex in red tilapia and should facilitate further exploration of sex determination mechanisms in this species.

关键词： Red tilapia QTL mapping Sex SNPs

Estimation of soil organic carbon stock and its controlling factors in cropland of Yunnan Province,China

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2022年第5期21卷 1475-1487页

作者： SUN Tao TONG Wen-jie CHANG Nai-jie DENG Ai-xing lin Zhong-long FENG Xing-bing LI Jun-ying SONG Zhen-wei Institute of Crop Sciences Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Physiology and EcologyMinistry of Agriculture and Rural AffairsBeijing 100081P.R.China Yunnan Academy of Tobacco Agricultural Sciences Kunming 650021P.R.China Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural SciencesBeijing 100081P.R.China China Tobacco Company Yunnan Branch Kunming 650011P.R.China

Soil organic carbon(SOC)is the most important indicators of soil quality and *** the spatial distribution of SOC and its influencing factors in cropland is crucial to understand the terrestrial carbon cycle and optimize agronomic *** Province,characterized by mountainous topography and varied elevation,is one of the highest SOC regions in *** its SOC stock of cropland and influencing factors has not been fully studied due to the lack of adequate soil *** this study,the digital mapping of SOC at 1 km resolution and the estimation of total SOC stock in cropland of Yunnan Province was undertaken using 8637 topsoil(0-20 cm)samples and a series of spatial data through Random Forest(RF)*** was showed that across the cropland of Yunnan Province,the mean SOC density and total stock were 4.84 kg m^(-2) and 337.5 Mt,*** spatial distribution indicated that relatively high SOC density regions resided in the northwest and northeast parts of Yunnan ***(19.5%),temperature(17.3%),rainfall(14.5%),and Topographic wetness index(9.9%)were the most important factors which controlled spatial variability of SOC *** practices(e.g.,crop straw treatments,fertilizer management)should be optimized for the sustainable development of crop production with high SOC sequestration capacity in Yunnan Province.

关键词： cultivated land soil organic carbon spatial distribution driving factors Random Forest

Radiation pattern analyses of circular aperture antenna to generate radio orbital angular momentum

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 2018年第6期25卷 1513-1523页

作者： lin Cheng-long lin Ming-tuan LIU Pei-guo TANG Xing College of Electronic Science National University of Defense TechnologyChangsha 410073China Army Agency Office of Nanjing Army Nanjing 210000China ~ Central South University Press and Springer-Verlag GmbH Germanypart of Springer Nature 2018

Circular aperture antenna recently has been regarded as a nature source to generate high power radio orbital angular momentum （OAM） in millimeter （mm） wave; however, the radiation pattern was not investigated. Theoretical derivation of radiation pattern of circular aperture OAM antenna is conducted to evaluate the performance. Extensive simulations verify the validity of the theoretical result. Furthermore, performance of such antenna excited by orthogonal TE and TM modes is compared, which shows the potential application for TEgl mode to create pure OAM g-1 mode in a practical system, providing guidance for generation of twisted radio waves in mm-wave bands.

关键词： orbital angular momentum (OAM) twisted radio wave millimeter-wave circular aperture antenna radiation pattern TE mode TM mode