检索结果-南通市图书馆

Liberation characteristics of coal middlings comminuted by jaw crusher and ball mill

在线全文

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2013年第5期23卷 669-674页

作者： Xie Weining He Yaqun Zhu Xiangnan Ge linhan Huang Yajun Wang Haifeng School of Chemical Engineering and Technology China University of Mining & Technology Advanced Analysis & Computation Center China University of Mining & Technology

The associated minerals make coal middlings possess a relatively high ash *** liberation through size reduction can cause recovery ***,effect of comminution facilities on mineral liberation of middlings was *** paper studied the liberation characteristics of middlings crushed with different kinds of fragmentation *** of 3 mm+0.5 mm sampled from a dense medium cyclone were comminuted by a jaw crusher and a ball mill to 0.5 mm with similar size distribution *** generating mechanism of fnes was also *** densimetric analyses indicate that mineral liberation of the product crushed by the jaw crusher is better than that by the ball mill at each *** sizes of 0.125 mm+0.074 mm and 0.074 mm,yields of the product with ash content 11%comminuted by jaw crusher are nearly 20%higher than that by the ball *** micrographs observed by the scanning electron microscopy(SEM)also show the same law for these two fractions and some intergrowth particles still exist in the fraction of 0.5 mm+0.25 mm.

关键词： Coal middlings Fragmentation force Liberation Float and sink test Sectional micrograph

Statistics of Galactic Supernova Remnants

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Astronomy and Astrophysics 2005年第2期5卷 165-174页

作者： Jian-WenXu Xi-ZhenZhang Jin-linhan NationalAstronomicalObservatories ChineseAcademyofSciencesBeijing100012

We collected the basic parameters of 231 supernova remnants (SNRs) in ourGalaxy, namely, distances (d) from the Sun, linear diameters (D), Galactic heights (Z), estimatedages (t), luminosities (L), surface brightness (Σ) and flux densities (S_1) at 1-GHz frequency andspectral indices (α). We tried to find possible correlations between these parameters. As expected,the linear diameters were found to increase with ages for the shell-type remnants, and also to havea tendency to increase with the Galactic heights. Both the surface brightness and luminosity ofSNRs at 1-GHz tend to decrease with the linear diameter and with age. No other relations between theparameters were found.

关键词： methods: statistical (ISM:) supernova remnants

Ensemble RBF modeling technique for quality design

在线全文

学校读者我要写书评

暂无评论

Journal of Management Science and Engineering 2019年第2期4卷 105-118页

作者： linhan Ouyang Liangqi Wan Chanseok Park Jianjun Wang Yizhong Ma College of Economics and Management Nanjing University of Aeronautics and AstronauticsNanjing211106China Department of Industrial Engineering Pusan National UniversityBusan 46241South Korea Department of Management Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China

This paper proposes an ensemble radial basis function neural network that selects important RBF subsets based on Pareto chart using Bootstrap ***,the analysis of variance method is used to determine the choice of the unequal/equal *** effectiveness of the proposed technique is illustrated with a micro-drilling *** comparison results show that the proposed technique can not only improve the model prediction performance,but also generate a reliable scheme for quality design.

关键词： RBF model Ensemble model Model selection Pareto chart Process optimization

Evaluation on ChatGPT for Chinese Language Understanding

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Data Intelligence 2023年第4期5卷 885-903页

作者： linhan Li Huaping Zhang Chunjin Li Haowen You Wenyao Cui School of Computer Science Beijing Institute of TechnologyBeijingChina

ChatGPT has attracted extension attention of academia and *** paper aims to evaluate ChatGPT in Chinese language understanding capability on 6 tasks using 11 *** indicate that ChatGPT achieved competitive results in sentiment analysis,summary,and reading comprehension in Chinese,while it is prone to factual errors in closed-book ***,on two more difficult Chinese understanding tasks,that is,idiom fill-in-the-blank and cants understanding,we found that a simple chain-of-thought prompt can improve the accuracy of ChatGPT in complex *** paper further analyses the possible risks of using ChatGPT based on the ***,we briefly describe the research and development progress of our ChatBIT.

关键词： Language Model ChatGPT ChatBIT Chinese Language Understanding Artificial intelligence

Functional Characterization of the Promoter and Second Intron of CUM1 during Flower Development in Cucumber(Cucumis sativus L.)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Horticultural Plant Journal 2018年第3期4卷 103-110页

作者： GU Ran LIU Xiaofeng ZHAO Wensheng YAN Shuangshuang SUN linhan WU Binning ZHANG Xiaolan Department of Vegetable Sciences Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable CropsChina Agricultural University

The characterization of flower specific promoter is critical during flower development by cucumber transformation ***(AG)is an organ identity gene that is required for carpel and stamen development in *** promoter and second intron of AG contain multiple regulatory elements that confer proper spatial and temporal *** is an important vegetable with unisexual *** MADS-box 1(CUM1)is the AG homolog in cucumber,belonging to the eu AG lineage along with *** situ hybridization showed that CUM1 was specifically expressed in the stamens and carpels of *** staining indicated that the second intron of CUM1 confers stamen-specific expression,while the promoter of CUM1 drives both stamen-and carpel-specific expression during the early stages of flower development,but is restricted to carpel-and connectivum-specific expression during the late stages of flower ***,a yeast one-hybrid assay demonstrated that two auxin response factors(Cs ARF13 and Cs ARF17)had bound directly to the second intron of *** data suggest that different regulatory circuits operate in AG homologs in plant species with distinct sex types.

关键词： cucumber CUM1 promoter intron in situ hybridization GUS staining yeast one-hybrid

Pathogenesis of allergic diseases and implications for therapeutic interventions

在线全文

学校读者我要写书评

暂无评论

Signal Transduction and Targeted Therapy 2023年第4期8卷 1784-1813页

作者： Ji Wang Yumei Zhou Honglei Zhang linhan Hu Juntong Liu Lei Wang Tianyi Wang Haiyun Zhang Linpeng Cong Qi Wang National Institute of TCM constitution and Preventive Medicine School of Chinese MedicineBeijing University of Chinese MedicineBeijing 100029P.R.China National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 1000210China

Allergic diseases such as allergic rhinitis (AR), allergic asthma (AAS), atopic dermatitis (AD), food allergy (FA), and eczema aresystemic diseases caused by an impaired immune system. Accompanied by high recurrence rates, the steadily rising incidence ratesof these diseases are attracting increasing attention. The pathogenesis of allergic diseases is complex and involves many factors,including maternal-fetal environment, living environment, genetics, epigenetics, and the body’s immune status. The pathogenesisof allergic diseases exhibits a marked heterogeneity, with phenotype and endotype defining visible features and associatedmolecular mechanisms, respectively. With the rapid development of immunology, molecular biology, and biotechnology, manynew biological drugs have been designed for the treatment of allergic diseases, including anti-immunoglobulin E (IgE), antiinterleukin(IL)-5, and anti-thymic stromal lymphopoietin (TSLP)/IL-4, to control symptoms. For doctors and scientists, it is becomingmore and more important to understand the influencing factors, pathogenesis, and treatment progress of allergic diseases. Thisreview aimed to assess the epidemiology, pathogenesis, and therapeutic interventions of allergic diseases, including AR, AAS, AD,and FA. We hope to help doctors and scientists understand allergic diseases systematically.

关键词： allergic diseases therapeutic

Milestones in the Observations of Cosmic Magnetic Fields

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Astronomy and Astrophysics 2002年第4期2卷 293-294页

作者： Jin－linhan RichardWielebinski NationalAstronomicalObservatories ChineseAcademyofSciencesBeijing100012 Max－Planck－InstitutfuerRadiosatonomie AufdemHuegel69D－5312BonnGermanyR2002J10；accepted2002June14

Magnetic fields are observed everywhere in the universe. In this review, we concentrate on the observational aspects of the magnetic fields of Galactic and extragalactic objects. Readers can follow the milestones in the observations of cosmic magnetic fields obtained from the most important tracers of magnetic fields, namely, the star-light polarization, the Zeeman effect, the rotation measures (RMs, hereafter) of extragalactic radio sources, the pulsar RMs, radio polarization observations, as well as the newly implemented sub-mm and mm polarization capabilities. The magnetic field of the Galaxy was first discovered in 1949 by optical polarization observations. The local magnetic fields within one or two kpc have been well delineated by starlight polarization data. The polarization observations of diffuse Galactic radio background emission in 1962 confirmed unequivocally the existence of a Galactic magnetic field. The bulk of the present information about the magnetic fields in the Galaxy comes from analysis of rotation measures of extragalactic radio sources and pulsars, which can be used to construct the 3-D magnetic field structure in the Galactic halo and Galactic disk. Radio synchrotron spurs in the Galactic center show a poloidal field, and the polarization mapping of dust emission and Zeeman observation in the central molecular zone reveal a toroidal magnetic field parallel to the Galactic plane. For nearby galaxies, both optical polarization and multifrequency radio polarization data clearly show the large-scale magnetic field following the spiral arms or dust lanes. For more distant objects, radio polarization is the only approach available to show the magnetic fields in the jets or lobes of radio galaxies or quasars. Clusters of galaxies also contain widely distributed magnetic fields, which are reflected by radio halos or the RM distribution of background objects. The intergalactic space could have been magnetized by outflows or galactic superwinds even i

关键词： magnetic fields - polarization - ISM: magnetic fields - galaxies: magnetic fields - pulsars

Photosensitizer-assisted direct 2D patterning and 3D printing of colloidal quantum dots

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第12期17卷 10460-10466页

作者： Wenyue Qing Yilong Si Mingfeng Cai Likuan Zhou Longjia Wu Zhengwei Hou Dan Liu Xiaoli Tian Wangyu Liu linhan Lin Hao Zhang Department of Chemistry Center for BioAnalytical ChemistryKey Laboratory of Bioorganic Phosphorus Chemistry&Chemical Biology(Ministry of Education)Tsinghua UniversityBeijing 100084China TCL Research Shenzhen 518067China Key Laboratory of Advanced Materials(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentsTsinghua UniversityBeijing 100084China

Direct photopatterning is a powerful strategy for patterning colloidal quantum dots(QDs)for their integration in various electronic and optoelectronic ***,ultraviolet(UV)exposure required for QD patterning,especially those with short wavelength(e.g.,deep UV light),can degrade the photo-,and electroluminescence,and other properties of patterned *** we develop a photosensitizer-assisted approach for direct photopatterning of QDs with h-line(centered at 405 nm)UV light and better preservation of their luminescent *** approach uses a photosensitizer that can absorb the h-line UV light and transfer the energy to activate bisazide-based crosslinkers via Dexter energy ***,high-resolution(smallest feature size,2μm),and full-color patterns of red,green,and blue QD layers can be *** patterned QD layers maintain up to~90%of their original photoluminescent quantum yields,comparing favorably with those(<60%)of QDs patterned without *** further extended the strategy to the direct three-dimensional(3D)printing of *** photosensitizerassisted approach offers a new way for direct two-dimensional(2D)photopatterning and 3D printing of colloidal QDs,with implications in building high-performance QD optoelectronic devices.

关键词： direct photopatterning quantum dots photosensitizer Dexter energy transfer three-dimensional(3D)printing

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

水面舰艇非典型安装设备冲击环境特征

哈尔滨工程大学学报 2012年第8期33卷 972-977页

作者：冯麟涵汪玉杜俭业中国人民解放军92537部队中国人民解放军92857部队

非典型安装设备在水下爆炸冲击作用下冲击环境特征,与一般垂直、悬挂、侧挂设备不同,利用有限元软件结合子模型方法,研究了水下爆炸载荷作用下非典型安装设备冲击环境特性.以相控阵雷达阵面作为研究对象,分析设备安装形式对非典型安装... 详细信息

非典型安装设备在水下爆炸冲击作用下冲击环境特征,与一般垂直、悬挂、侧挂设备不同,利用有限元软件结合子模型方法,研究了水下爆炸载荷作用下非典型安装设备冲击环境特性.以相控阵雷达阵面作为研究对象,分析设备安装形式对非典型安装形式设备的冲击输入及冲击响应的影响,提出了阵面结构及内部元器件抗冲击设计载荷建议,旨在为水面舰艇非典型安装设备抗冲击设计及评估提供参考.

关键词：非典型安装设备冲击环境水下爆炸子模型