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Natural Gas Pressure Reduction Station Self-powered by Fire Thermoelectric Generator

Journal of Thermal Science 2022年第3期31卷 840-853页

作者： WANG Yupeng tong Xiao WANG Hongmei QIU Junfeng shen Limei School of Energy and Power Engineering Huazhong University of Science and TechnologyWuhan430074China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen518055China Hangzhou Steam Turbine Company Limited Hangzhou310022China shenzhen Huazhong University of Science and Technology Research Institute Shenzhen518057China

Pressure reduction station(PRS)is an essential facility in natural gas transmission,which owns the function of pressure reduction,demand-supply management and flow ***,a large number of PRSs are located in off-grid areas and powered by battery equipment resulting in high maintenance ***,how to realize the energy independence of these PRSs is an urgent issue to be ***,the natural gas fired thermoelectric generation(FTEG)module,including gas flue,cover,TEGs and heat radiators,is designed for PRS in off-grid *** change material is introduced into the FTEG module to change the operation mode from continuous mode into a periodic mode,and the prototype of the FTEG module is built to discuss the generation performance in different *** results show that the generation efficiency of the FTEG module is improved by 63%in periodic mode compared with the continuous ***,the numerical model is established to investigate the impacts of air coefficient,cold-side heat radiator and number of TEGs on the module *** found that the impacts of cold-side heat radiator and the number of TEGs are more significant than those of the air *** adjusting these key parameters,an optimized FTEG module with 32 TEGs is proposed,which has an average power generation of 16.4 W and a heat collection efficiency of 84.6%.Eventually,3 to 6 modules can be connected in series to meet the power requirement of 50 W to 100 W for *** high-performance FTEG module can accelerate the process of achieving the energy independence of PRS and promote its application in mesoscale equipment.

关键词： pressure reduction station natural gas thermoelectric generator phase change material periodic mode

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Insight into the in vivo fate of intravenous herpetrione amorphous nanosuspensions by aggregation-caused quenching probes

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Chinese Chemical Letters 2022年第11期33卷 4948-4951页

作者： Lingyu Hang Chengying shen Baode shen Hailong yuan Department of Pharmacy Air Force Medical CenterPLABeijing 100142China College of Pharmacy Jiangxi University of Chinese MedicineNanchang 330004China Department of Pharmacy Jiangxi Provincial People's HospitalNanchang 330006China

Intravenous nanosuspensions are attracted growing attention as a viable strategy for development of intravenous formulations of poorly water-soluble ***,only few information about the biological fate of intravenous nanosuspensions is currently known,especially amorphous nanosuspensions are not reported *** this study,the in vivo fate of herpetrione(HPE)amorphous nanosuspensions following intravenous administration was explored by using an aggregation-caused quenching(ACQ)probe and HPLC *** ACQ probe is physically embedded into HPE nanoparticles via anti-solvent method to form HPE hybrid nanosuspensions(HPE-HNSs)for ***-HNSs emit strong and stable fluorescence,but fluorescence quenches immediately upon the dissolution of HPE-HNSs,confirming the selfdiscrimination of *** intravenous administration of HPE-HNSs,integral HPE-HNSs and HPE show similar degradation and biodistribution,with rapid clearance from blood circulation and obvious accumulation in liver and *** to the slower dissolution and enhanced recognition by reticuloendothelial system,450 nm HPE-HNSs accumulate more in liver,lung and spleen than that of 200 nm *** results demonstrate that integral HPE-HNSs determine the in vivo performance of *** study provides insight into the in vivo fate of intravenous amorphous nanosuspensions.

关键词： Amorphous nanosuspensions Herpetrione In vivo fate Intravenous delivery Aggregation-caused quenching

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Nonreciprocal directional dichroism in multiferroics

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Science China(Physics,Mechanics & Astronomy) 2020年第10期63卷 47-61页

作者： Yang shen Bing Yu WenYi tong QingBiao Zhao ChunGang Duan Key Laboratory of Polar Materials and Devices Ministry of EducationDepartment of Electronic ScienceEast China Normal UniversityShanghai 200062China Theoretical Materials Physics Universitéde LiègeLiège B-4000Belgium Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Nonreciprocal directional dichroism in multiferroics,namely magnetoelectric coupling in the dynamic regime,is endowed with rich physics and promising applications,which are entangled with fundamental physical components,such as spin,orbital,lattice,charge,and *** a linear nonreciprocal response behavior in the GHz-THz frequency range,represented by optical magnetoelectric effect and magnetochiral dichroism,occurs ubiquitously in material systems with the spontaneous breaking of space-time symmetry,and is subject to Onsager’s reciprocal theorem in the thermodynamic ***,these nonreciprocal responses are usually encoded by toroidization(chirality)and electromagnon(quasiparticle),thus establishing a comprehensive understanding of magnetoelectric coupling and irreversible ***,the basic mechanisms and emergent nonreciprocal directional dichroism in single-phase multiferroics are *** expect that the present review will stimulate diverse possibilities toward nonreciprocal directional dichroism within and beyond multiferroics.

关键词： nonreciprocal directional dichroism multiferroic materials optical magnetoelectric effect magnetochiral dichroism electromagnon

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State Estimation of the Electric Drive Articulated Dump Truck Based on UKF

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Journal of Harbin Institute of Technology(New Series) 2015年第6期22卷 21-30页

作者： Chun Jin tong Liu Yanhua shen School of Mechanical Engineering University of Science and Technology Beijing

The requirements of vehicle dynamic stability control are higher than ever as the significant increase of electric drive articulated vehicle speed. According to the construction features of articulated dumping truck and nonlinear characteristics of moving vehicles,nonlinear observer of vehicle status is designed to strength robustness of dynamic control system in this paper. A 4-degree-of-freedom nonlinear dynamic model of articulated electric drive vehicle is built as reference model to estimate the state of the articulated vehicle. And by adopting Unscented Kalman Filter( UKF) algorithm,a series of state parameters such as longitudinal velocities of front and rear frames,yaw rate and side-slip angle are estimated. During the test of 60 t articulated electric drive vehicle,2 inertial navigation modules are installed in the front frame and rear frame respectively and the speed of each electric drive wheel is obtained simultaneously. As the test results suggest,in various working conditions,the algorithm based on UKF is able to accurately estimate the state parameters of articulated vehicle with the estimated error less than 5%. The proposed method is justified to be the theoretical basis and application guidance for articulated vehicle stability control.

关键词： articulated dump trucks nonlinear observer soft measurement Unscented Kalman Filter sideslip angle

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Fighting Against Academic Misconduct:What Can Scientometricians Do?

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Journal of Data and Information Science 2022年第2期7卷 4-5页

作者： Sichao tong Zhesi shen Tian-yuan Huang Liying Yang National Science Library Chinese Academy of SciencesBeijing 100190P.R.China

As the number of published papers being retracted is increasing dramatically and is higher than ever before, the phenomenon of retraction has aroused widespread concern in the research community all over the world. It has been mentioned that large-scale retracted papers from China appeared in journals of major publishers(Tang, 2019). After we classified these retracted papers published between 2011 and 2021 based on their retraction reasons(1), we see that 8,594 cases are retracted because of academic misconduct. The “academic misconduct” problem has become a common issue faced by academic communities worldwide, including China.

关键词： Academic academic mentioned

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Simulation of quenching in horizontal geometry channel

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Nuclear Science and Techniques 2010年第6期21卷 370-374页

作者： yuan Jingtian tong Lili Cao Xuewu Shanghai Jiao tong Univ Sch Mech Engn Shanghai 200240 Peoples R China

Two tests of refilling and reflooding in the horizontal geometry channel under different pressure conditions,respectively,are conducted to understand the thermal hydraulics behavior during a LOCA in the CANDU *** case of refilling a hot horizontal tube test and four cases of reflooding a horizontal fuel channel test series (35%and 60%break size of reactor inlet header with single-end injection or both-end injection,respectively) have been *** horizontal channel is simulated with the model splitting as parallel pipes with cross flow junction *** simulation results have been compared with the tests in terms of wall temperature or heated-pin surface *** results are reasonably acceptable and it shows that the code is applicable on horizontal channel quenching.

关键词：水平测试通道测试模型模拟几何淬火 CANDU堆压力条件热工水力

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企业数字化转型与全球价值链参与

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管理工程学报 2025年第1期39卷 15-31页

作者：李鑫佟岩曹丰北京理工大学管理学院北京100081 湖南大学工商管理学院湖南长沙410082

本文立足“逆全球化”时代数字经济发展迅速的现实背景,利用2010年至2016年中国A股上市公司与中国海关数据库的合并数据,实证检验了企业数字化转型对其全球价值链参与的影响。研究表明,数字化转型能够促进企业更好地融入全球价值链,并... 详细信息

本文立足“逆全球化”时代数字经济发展迅速的现实背景,利用2010年至2016年中国A股上市公司与中国海关数据库的合并数据,实证检验了企业数字化转型对其全球价值链参与的影响。研究表明,数字化转型能够促进企业更好地融入全球价值链,并且该结论在经过一系列稳健性检验后依然成立。影响机制检验发现,企业数字化转型对全球价值链嵌入的提升作用主要通过缓解融资约束和提高生产效率来实现。异质性检验结果表明,当数字化转型基础较好、劳动力需求较高以及成本加成较低时,企业数字化转型对全球价值链参与的影响更为凸显。本文丰富和拓展了企业数字化转型影响机制与经济后果的研究框架,为企业更好地融入全球价值链分工体系、实现高质量发展找到了新的经验证据,对于企业数字化相关政策的制定与调整也具有一定的参考价值。

关键词：数字化转型全球价值链嵌入融资约束生产效率

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Distributed Adaptive Asymptotic Tracking of 2-D Vehicular Platoon Systems With Actuator Faults and Spacing Constraints

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IEEE/CAA Journal of Automatica Sinica 2023年第5期10卷 1352-1354页

作者： Jiayi Lei yuan-Xin Li Shaocheng tong the College of Science Liaoning University of TechnologyJinzhou 121001China

Dear Editor,This letter investigates the adaptive asymptotic tracking slidingmode control for nonlinear 2-D vehicular platoon systems subject to actuator ***,by using the Nussbaum function,the disadvantageous factors ... 详细信息

关键词： Asymptotic asymptotic letter

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Flow properties of three fuel powders

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Particuology 2012年第4期10卷 438-443页

作者： Pan Chen Zhulin yuan Xianglin shen yuanyuan Zhang School of Energy and Environment Southeast UniversityNanjing 210096China

Flow and physical properties were measured for three fuel powders： sawdust, brown coal and hard coal. Besides physical properties, e.g., particle size, bulk density and moisture content, flowability was investigated using the standard shear testing technique of the Jenike shear cell. Flow functions of the three powders used for characterization of bulk flow and design of hoppers were determined, and then compared and discussed. The flow functions of the three powders are located in different regions： while brown coal and hard coal were classified respectively as easy flowing and cohesive material, sawdust was found in regions varying from cohesive to easy fowing at low consolidation stress. The measured effective angle of internal friction and angle of wall friction were 55° and 31.4° for sawdust; 36.2° and 26° for brown coal; and 43.3° and 27.8° for hard coal. Using the measured powder flow properties, Jenike＇s procedure was then followed to estimate and compare the critical hopper dimensions for mass flow of the three powders.

关键词： Powder flow functionEffective angle of internal frictionAngle of wall frictionJenike shear cellParticle distributionMoisture content

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Defects activation in CoFe-based metallic glasses during creep deformation

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Journal of Materials Science & Technology 2021年第10期69卷 42-47页

作者： Zhuwei Lv Chenchen yuan Haibo Ke Baolong shen School of Materials Science and Engineering Jiangsu Key Laboratory for Advanced Metallic MaterialsSoutheast UniversityNanjing211189China Songshan Lake Materials Laboratory Dongguan523808China

Maxwell-Voigt model with two Kelvin units and one Maxwell unit was utilized to analyze the microalloying effect of Cu on the creep behavior of CoFe-based metallic glasses at different loading *** defect activation during creep deformation was detected by the relaxation time spectrum based on this *** defect,with respect to a short relaxation time in relaxation spectra,intends to be activated at a quasi-static loading mode in the alloy with 0.5 at.%Cu *** further increasing loading rates,more defects with a large size were provoked activated at both hard and soft regions in the Cu-containing sample.A softening with the reduction of elastic modulus and hardness about 10%and 15%,respectively,was also observed in the Cu-doped *** is consistent with the pronounced viscoplastic deformation of this alloy along with the decrease of *** work provides a microscopic insight into structural evolution during creep deformation in a Cu-doped metallic glass,which might help for understanding the plastic deformation of metallic glasses upon a minor addition.

关键词： Plasticity Creep Disordered Structure Metallic glasses

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