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Working condition recognition of sucker rod pumping system based on 4-segment time-frequency signature matrix and deep learning

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Petroleum Science 2024年第1期21卷 641-653页

作者： Yun-Peng He Hai-Bo Cheng Peng Zeng Chuan-Zhi zang qing-Wei Dong Guang-Xi Wan Xiao-Ting Dong State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang 110016LiaoningChina Key Laboratory of Networked Control Systems Chinese Academy of SciencesShenyang 110016LiaoningChina Institutes for Robotics and Intelligent Manufacturing Chinese Academy of SciencesShenyang 110169LiaoningChina University of Chinese Academy of Sciences Beijing100049China School of Artifcial Intelligence Shenyang University of TechnologyShenyang 110870LiaoningChina

High-precision and real-time diagnosis of sucker rod pumping system(SRPS)is important for quickly mastering oil well *** learning-based method for classifying the dynamometer card(DC)of oil wells is an efficient diagnosis ***,the input of the DC as a two-dimensional image into the deep learning framework suffers from low feature utilization and high computational ***,different SRPSs in an oil field have various system parameters,and the same SRPS generates different DCs at different ***,there is heterogeneity in field data,which can dramatically impair the diagnostic *** solve the above problems,a working condition recognition method based on 4-segment time-frequency signature matrix(4S-TFSM)and deep learning is presented in this ***,the 4-segment time-frequency signature(4S-TFS)method that can reduce the computing power requirements is proposed for feature extraction of DC ***,the 4S-TFSM is constructed by relative normalization and matrix calculation to synthesize the features of multiple data and solve the problem of data ***,a convolutional neural network(CNN),one of the deep learning frameworks,is used to determine the functioning conditions based on the *** on field data verify that the proposed diagnostic method based on 4S-TFSM and CNN(4S-TFSM-CNN)can significantly improve the accuracy of working condition recognition with lower computational *** the best of our knowledge,this is the first work to discuss the effect of data heterogeneity on the working condition recognition performance of SRPS.

关键词： Sucker-rod pumping system Dynamometer card Working condition recognition Deep learning Time-frequency signature Time-frequency signature matrix

Tungsten control in type-I ELMy H-mode plasmas on EAST

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Nuclear Science and Techniques 2021年第9期32卷 61-72页

作者： Zong Xu Zhen-Wei Wu Ling Zhang Yun-Xing Cheng Wei Gao Xiao-Dong Lin Xiang Gao Ying-Jie Chen Yue-Heng Huang Juan Huang qing zang Yin-Xian Jie Yan-Min Duan Ying-Ying Li Hai-qing Liu Guo-Sheng Xu EAST team Advanced Energy Research Center Shenzhen UniversityShenzhen 518060China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Institute of Plasma Physics Chinese Academy of ScienceHefei 230031China University of Science&Technology of China Hefei 230031China

The first experimental investigation of the tungsten behavior in ELMy H-mode plasmas with co-/counter neutral beam injection(NBI)and unfavor-able/favorable B t was performed on *** was found to accumulate easily in ELMy H-mode plasma with co-NBI heating and unfavorable B ***,in this case the tungsten concentration can exceed 10^(-4),resulting in degradation of the plasma confinement and periodic H–L *** reduce the tungsten concentration in steady-state type-I ELMy H-mode operation,counter-NBI is applied to modify the density and temperature and brake the plasma toroidal *** applied counter-NBI decreases the PHZ+E_(r) inward pinch velocity and rever-ses the direction of neoclassical inward convection,thus decreasing the tungsten concentration from-7×10^(-5) to-2×10^(-5) in type-I ELMy H-mode plasma with favorable B_(t).A comparison of the effects of different B_(t) directions on the tungsten behavior also shows that favor-able B_(t) is beneficial for reducing the tungsten concentration in the core *** results imply that counter-NBI with favorable B_(t) can effectively prevent tungsten accu-mulation and expand the operating window for exploring steady-state type-I ELMy H-mode operation of EAST.

关键词： Tungsten accumulation Counter-NBI Favorable B_(t)ELMy H-mode EAST

Microwave-Assisted Confining Growth and Liquid Exfoliation of sp3-Hybrid Carbon Nitride Nano/Micro-Crystals

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ENERGY & ENVIRONMENTAL MATERIALS 2024年第6期7卷 399-408页

作者： Shen, Chenglong Lou, qing Liu, Kaikai Zheng, Guangsong Song, Runwei zang, Jinhao Yang, Xigui Li, Xing Dong, Lin Shan, Chongxin Zhengzhou Univ Minist Educ Sch Phys & Lab Zhongyuan Light Henan Key Lab Diamond Optoelect Mat & DevicesKey Zhengzhou 450052 Peoples R China

As one promising carbon-based material, sp(3)-hybrid carbon nitride has been predicted with various novel physicochemical properties. However, the synthesis of sp(3)-hybrid carbon nitride is still limited by the nanaoscale, low crystallinity, complex source, and expensive instruments. Herein, we have presented a facile approach to the sp(3)-hybrid carbon nitride nano/micro-crystals with microwave-assisted confining growth and liquid exfoliation. Actually, the carbon nitride nano/micro-crystals can spontaneously emerge and grow in the microwave-assisted polymerization of citric acid and urea, and the liquid exfoliation can break the bulk disorder polymer to retrieve the highly crystalline carbon nitride nano/micro-crystals. The obtained carbon nitride nano/micro-crystals present superior blue light absorption strength and surprising photoluminescence quantum yields of 57.96% in ethanol and 18.05% in solid state. The experimental characterizations and density functional theory calculations reveal that the interface-trapped localized exciton may contribute to the excellent intrinsic light emission capability of carbon nitride nano/micro-crystals and the interparticle staggered stacking will prevent the aggregation-caused-quenching partially. Finally, the carbon nitride nano/micro-crystals are demonstrated to be potentially useful as the phosphor medium in light-emitting-diode for interrupting blue light-induced eye damage. This work paves new light on the synthesis strategy of sp(3)-hybrid carbon nitride materials and thus may push forward the development of multiple carbon nitride research.

关键词： confining growth density functional theory liquid exfoliation luminescence sp(3)-hybrid carbon nitride BETA-C3N4 FLUORESCENT FILMS NANODOTS DRIVEN ROUTE DOTS CNX

Prevalence and clinical significance of SEN virus infection in patients with non A-E hepatitis and volunteer blood donors in Shanghai

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World Journal of Gastroenterology 2008年第26期14卷 4204-4208页

作者： Zheng-Hao Tang Xiao-Hua Chen Yong-Sheng Yu Guo-qing zang Department of Infectious Diseases Sixth People's Hospital Affiliated to Shanghai Jiaotong University Shanghai200233 China

AIM:To explore the prevalence of SEN virus (SENV) in patients with non A-E hepatitis and volunteer blood donors in Shanghai. METHODS: According to the published gene sequences, primers from the conserved region were designed. Then, the prevalence of SEN virus in 30 samples from healthy voluntary blood donors and 30 samples from patients with non A-E hepatitis were detected by nested-PCR of SENV-D/H. Some PCR products were cloned and sequenced. RESULTS: The specificity of genotype-specific PCR was confirmed by sequencing, the SENV DNA was detected in 53.3% of the patients with non A-E hepatitis and 10% of the blood donors. The prevalence of SENV-D/H viremia was significantly higher in patients with non A-E hepatitis than in blood donors (P = 0.0002). SENV-H subtype and SENV-D subtype were found in 2 and 1 samples, respectively from blood donors. SENV-H subtype, SENV D subtype, mixed SENV-D and SENV-H subtype were found in 8, 6 and 2 samples, respectively, from patients with non A-E hepatitis. CONCLUSION: The gene type of SENV in patients with non A-E hepatitis and blood donors in shanghai is D or H subtype, and transfusion is not the only transmitting form of SENV.

关键词： SEN virus Nested PCR Blood donor NonA-E hepatitis

Measurement of molybdenum ion density for L-mode and H-mode plasma discharges in the EAST tokamak

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Chinese Physics B 2020年第6期29卷 333-338页

作者： Yongcai Shen Hongming Zhang Bo Lyu Yingying Li Jia Fu Fudi Wang qing zang Baonian Wan Pan Pan Minyou Ye 不详 Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China School of Mathematics and Physics Anqing Normal UniversityAnqing 246011China Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026China the EAST team

We report the measurement of total molybdenum ion density for L-mode and H-mode plasmas on EAST using spectral lines observation and calculation based on an impurity transport code.A flat-filed extreme ultraviolet spectrometer with some spatial resolution is used to obtain the radial profiles of molybdenum spectral line *** absolute calibration for the extreme ultraviolet spectrometer is finished by comparing the calculated bremsstrahlung intensity with the readings of CCD *** ion transport study is performed using the radial ion density profiles and one-dimensional impurity transport code *** total molybdenum density profiles are determined from the transport *** molybdenum density during L-mode and H-mode phases are obtained,which are about 3 and 4 orders of magnitude smaller than the electron density,*** inward pinch is found during the H-mode phase that leads to the peaked profile of molybdenum density.

关键词： EAST EUV spectroscopy molybdenum density L-mode and H-mode

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京津冀协同发展中的利益分配问题研究

河北学刊 2015年第1期35卷 192-196页

作者：臧秀清燕山大学河北秦皇岛066000

近年来,京津冀区域经济发展已成为中国第三个经济发展引擎,建立京津冀协同发展的利益分配机制已迫在眉睫。本文首先分析了京津冀区域的整体利益与局部利益,其次着重阐述了京津冀协同发展中的利益整合,最后提出了建立京津冀协同发展利益... 详细信息

近年来,京津冀区域经济发展已成为中国第三个经济发展引擎,建立京津冀协同发展的利益分配机制已迫在眉睫。本文首先分析了京津冀区域的整体利益与局部利益,其次着重阐述了京津冀协同发展中的利益整合,最后提出了建立京津冀协同发展利益分配机制的对策建议,并强调急需打破既得利益格局。

关键词：京津冀国家战略利益分配机制建设

Rational design multi-color-emissive chemiluminescent carbon nanodots in a single solvothermal reaction

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Nano Research 2024年第6期17卷 4651-4660页

作者： Guang-Song Zheng Cheng-Long Shen Yuan Deng Kai-Kai Liu Jin-Hao zang Lin Dong qing Lou Chong-Xin Shan Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Materials PhysicsMinistry of Educationand School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China

Recently,the chemiluminescence(CL)induced by carbon nanodots(CDs)has intrigued researchers’extensive interests in various applications due to its special light emission ***,the difficulty of synthesizing chemiluminescent CDs with full-spectrum emission severely hinders the further regulation of the CL emission ***,the multi-color-emissive chemiluminescent CDs are rational designed and further synthesized by regulating the sp2-hybrid core and sp3-hybrid surface from the citrate-ammonia molecular in a single solvothermal *** experimental characterizations and density functional theory calculations reveal that the higher temperature can promote the crosslinking polymerization/carbonization of carbon core and the higher protonation of solvent can determine the core size of final CDs,resulting in the variant CL emission from molecular-,crosslinking-and ***,the CL emission of the CDs can be further synthesized by tuning the luminescence chromophores in the formation process via regulating the temperature and solvent,enabling the applications of the CL CDs in illumination and information *** study paves a new technology to understand the luminescence of CDs and affords an industry translational potential over traditional chemiluminescent molecular.

关键词： carbon nanodots chemiluminescence regulation energy level alignment mechanism

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初唐的文学理解与文学观念的形成

郑州大学学报（哲学社会科学版） 2007年第5期40卷 122-127页

作者：臧清北京语言大学汉语学院北京100083

初唐的文学创作与文学批评中存在着观念层次和实际存在空间的矛盾现象,即文人一方面汲汲于文事,一方面大力贬抑文学价值。这样的文学理解和文学观念是由魏征的政本思想逻辑塑造的。唐初士人普遍接受了贞观朝确立的为政本末价值体系,既... 详细信息

初唐的文学创作与文学批评中存在着观念层次和实际存在空间的矛盾现象,即文人一方面汲汲于文事,一方面大力贬抑文学价值。这样的文学理解和文学观念是由魏征的政本思想逻辑塑造的。唐初士人普遍接受了贞观朝确立的为政本末价值体系,既盛饰文辞以求仕进,又刻意以摒弃雕虫、高扬器识为标榜,这正是初唐反拨六朝的时代语境和文人的生存处境使然。

关键词：初唐文学观魏征唐太宗王勃

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唐初史臣的近代史观析论

中国文化研究 2007年第4期 52-60页

作者：臧清北京语言大学汉语学院 100083

唐初文学观念的核心是反拨六朝文学,其形成的思想背景是唐初史臣对近代历史的检讨。对于唐初文学观念的这一特征,以往文学研究界往往笼统地解释为唐初史臣出于"文学误国论"而向汉儒诗教说的简单复归,本文则通过对唐初史臣有关前朝政治... 详细信息

唐初文学观念的核心是反拨六朝文学,其形成的思想背景是唐初史臣对近代历史的检讨。对于唐初文学观念的这一特征,以往文学研究界往往笼统地解释为唐初史臣出于"文学误国论"而向汉儒诗教说的简单复归,本文则通过对唐初史臣有关前朝政治与文学论述的辨析,指出诸家之间实有实质性差别,其中魏征等人立足政本理念的近代史观最终确定了初唐的思想价值框架,建构了初唐的文学感觉空间。

关键词：魏征姚思廉六朝文学政本思想