针对各行各业海量文本文档的智能合约化需求,提取文本关键数据要素是首要基础.与传统命名实体识别(Named Entity Recognition,NER)相比,合约要素提取(Contract Element Extraction,CEE)技术旨在提取泛在较长、更多样、较冗余合约要素,...针对各行各业海量文本文档的智能合约化需求,提取文本关键数据要素是首要基础.与传统命名实体识别(Named Entity Recognition,NER)相比,合约要素提取(Contract Element Extraction,CEE)技术旨在提取泛在较长、更多样、较冗余合约要素,然而目前面临着中文研究不足、对新颖大语言模型(Large Language Model,LLM)技术应用不够充分、对文本上下文关联特征感知不足等挑战.本文首先提出了新颖的上下文语义感知动态填充方法(Context-sensitive Dynamic Padding Method,CDPM)、三重注意力层和要素边缘加权损失函数模块,在不增加硬件需求的前提下,为模型提供额外上下文语义信息,增强对上下文关联特征的感知能力,从而提升基于序列标注范式的CEE训练效率.其次,融合上述模块和BERT(Bidirectional Encoder Representations from Transformers)嵌入模型构建了一种基于上下文感知的合约要素提取模型(Context-Aware Model for Contract Element Extraction,CAM-CEE),实现了面向智能合约化场景的高性能要素提取.最后,在本文自主构建的数据集以及相关公开数据集上进行了大量实验.结果表明,本文提出框架CAM-CEE在micro F1、macro F1等指标上的性能超越最佳基线模型,并具有高通用性.展开更多
The Cooling Storage Ring(CSR)external-target experiment(CEE)will be the first large-scale nuclear physics experiment at the Heavy Ion Research Facility in Lanzhou(HIRFL).A beam monitor has been developed to monitor th...The Cooling Storage Ring(CSR)external-target experiment(CEE)will be the first large-scale nuclear physics experiment at the Heavy Ion Research Facility in Lanzhou(HIRFL).A beam monitor has been developed to monitor the beam status and to improve the reconstruction resolution of the primary vertex.Custom-designed pixel charge sensors,named TopmetalCEEv1,are employed in the detector to locate the position of each particle.Readout electronics for the beam monitor were designed,including front-end electronics utilizing the Topmetal-CEEv1 sensors,as well as a readout and control unit that communicates with the DAQ,trigger,and clock systems.A series of tests were performed to validate the functionality and performance of the system,including basic electronic verifications and responses toαparticles and heavy-ion beams.The results show that all designed functions of the readout electronics system work well,and this system could be used for beam monitoring in the CEE experiment.展开更多
A half-size prototype of the multi wire drift chamber for the cooling storage ring external-target experiment(CEE)was assembled and tested in the 350 MeV/u Kr+Fe reactions at the heavy-ion research facility in Lanzhou...A half-size prototype of the multi wire drift chamber for the cooling storage ring external-target experiment(CEE)was assembled and tested in the 350 MeV/u Kr+Fe reactions at the heavy-ion research facility in Lanzhou.The prototype consists of six sense layers,where the sense wires are stretched in three directions X,U,and V;meeting 0?,30?,and-30?,respectively,with respect to the vertical axis.The sensitive area of the prototype is 76 cm×76 cm.The amplified and shaped signals from the anode wires were digitized in a serial capacity array.When operating at a high voltage of 1500 V on the anode wires,the efficiency for each layer is greater than 95%.The tracking residual is approximately 301±2μm.This performance satisfies the requirements of CEE.展开更多
The cooling storage ring(CSR)external-target experiment(CEE)is a spectrometer used in construction to study the properties of nuclear matter in high-baryon density regions at the Heavy-Ion Research Facility in Lanzhou...The cooling storage ring(CSR)external-target experiment(CEE)is a spectrometer used in construction to study the properties of nuclear matter in high-baryon density regions at the Heavy-Ion Research Facility in Lanzhou(HIRFL).This study presents the design,simulation,manufacturing,and testing of a half-size prototype of a multi-wire drift chamber(MWDC)for the CEE.First,the performance of the MWDC connected to homemade electronics was simulated.The results demonstrated that an energy resolution of 18.5% for 5.9-keV X-rays and a position resolution of 194μm for protons can be achieved by the current design.Because the size of the largest MWDC reached 176 cm×314 cm,a set of 98 cm×98 cm prototypes was built using the new techniques.The positioning accuracy of the anode wires in this prototype is better than 20μm.After optimization,using commercially available electronics,the prototype can achieved an energy resolution of 19.7%for a^(55)Fe X-ray source.The CEE-MWDC detector and electronics were simultaneously tested.An energy resolution of 22%was achieved for the^(55)Fe source;the track residuals were approximately 330μm for the cosmic rays.The results demonstrate that the current design and techniques meet the requirements of the CEE-MWDC array.展开更多
文摘针对各行各业海量文本文档的智能合约化需求,提取文本关键数据要素是首要基础.与传统命名实体识别(Named Entity Recognition,NER)相比,合约要素提取(Contract Element Extraction,CEE)技术旨在提取泛在较长、更多样、较冗余合约要素,然而目前面临着中文研究不足、对新颖大语言模型(Large Language Model,LLM)技术应用不够充分、对文本上下文关联特征感知不足等挑战.本文首先提出了新颖的上下文语义感知动态填充方法(Context-sensitive Dynamic Padding Method,CDPM)、三重注意力层和要素边缘加权损失函数模块,在不增加硬件需求的前提下,为模型提供额外上下文语义信息,增强对上下文关联特征的感知能力,从而提升基于序列标注范式的CEE训练效率.其次,融合上述模块和BERT(Bidirectional Encoder Representations from Transformers)嵌入模型构建了一种基于上下文感知的合约要素提取模型(Context-Aware Model for Contract Element Extraction,CAM-CEE),实现了面向智能合约化场景的高性能要素提取.最后,在本文自主构建的数据集以及相关公开数据集上进行了大量实验.结果表明,本文提出框架CAM-CEE在micro F1、macro F1等指标上的性能超越最佳基线模型,并具有高通用性.
基金supported by the National Natural Science Foundation of China(Nos.11927901,12105110,U2032209,12275105)the National Key Research and Development Program of China(Nos.2020YFE0202002,2022YFA1602103)the Fundamental Research Funds for the Central Universities(No.CCNU22QN005)。
文摘The Cooling Storage Ring(CSR)external-target experiment(CEE)will be the first large-scale nuclear physics experiment at the Heavy Ion Research Facility in Lanzhou(HIRFL).A beam monitor has been developed to monitor the beam status and to improve the reconstruction resolution of the primary vertex.Custom-designed pixel charge sensors,named TopmetalCEEv1,are employed in the detector to locate the position of each particle.Readout electronics for the beam monitor were designed,including front-end electronics utilizing the Topmetal-CEEv1 sensors,as well as a readout and control unit that communicates with the DAQ,trigger,and clock systems.A series of tests were performed to validate the functionality and performance of the system,including basic electronic verifications and responses toαparticles and heavy-ion beams.The results show that all designed functions of the readout electronics system work well,and this system could be used for beam monitoring in the CEE experiment.
基金supported by the National Natural Science Foundation of China(Nos.11927901,11875301,11875302,U1867214,U1832105,U1832167)the Strategic Priority Research Program of Chinese Academy of Sciences(No.XDB34000000)+2 种基金the National Key R&D Program of China(No.2018YFE0205200)the CAS"Light of West China"Programthe Tsinghua University Initiative Scientific Research Program。
文摘A half-size prototype of the multi wire drift chamber for the cooling storage ring external-target experiment(CEE)was assembled and tested in the 350 MeV/u Kr+Fe reactions at the heavy-ion research facility in Lanzhou.The prototype consists of six sense layers,where the sense wires are stretched in three directions X,U,and V;meeting 0?,30?,and-30?,respectively,with respect to the vertical axis.The sensitive area of the prototype is 76 cm×76 cm.The amplified and shaped signals from the anode wires were digitized in a serial capacity array.When operating at a high voltage of 1500 V on the anode wires,the efficiency for each layer is greater than 95%.The tracking residual is approximately 301±2μm.This performance satisfies the requirements of CEE.
基金supported by the Research Program of the National Major Research Instruments(No.11927901)Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB34000000)+3 种基金the Function Development Project of Chinese Academy of Sciences(No.2022G101)National Key R&D Program of China(No.2018YFE0205200)Natural Science Foundation of China(Nos.11875301,11875302,U1867214,U1832105,U1832167)CAS"Light of West China"Program。
文摘The cooling storage ring(CSR)external-target experiment(CEE)is a spectrometer used in construction to study the properties of nuclear matter in high-baryon density regions at the Heavy-Ion Research Facility in Lanzhou(HIRFL).This study presents the design,simulation,manufacturing,and testing of a half-size prototype of a multi-wire drift chamber(MWDC)for the CEE.First,the performance of the MWDC connected to homemade electronics was simulated.The results demonstrated that an energy resolution of 18.5% for 5.9-keV X-rays and a position resolution of 194μm for protons can be achieved by the current design.Because the size of the largest MWDC reached 176 cm×314 cm,a set of 98 cm×98 cm prototypes was built using the new techniques.The positioning accuracy of the anode wires in this prototype is better than 20μm.After optimization,using commercially available electronics,the prototype can achieved an energy resolution of 19.7%for a^(55)Fe X-ray source.The CEE-MWDC detector and electronics were simultaneously tested.An energy resolution of 22%was achieved for the^(55)Fe source;the track residuals were approximately 330μm for the cosmic rays.The results demonstrate that the current design and techniques meet the requirements of the CEE-MWDC array.
