Zongjie Liu

Shanghai Electric (China)

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Yànhuá Lǐ

Yangzhou University

Lipeng Dong

Hebei General Hospital

Xiangjian Zhang

Hebei Medical University

Yinxue Xing

Xingtai People's Hospital

Huimin Qiao

Shanxi Agricultural University

Chaohui Wang

Xi'an Jiaotong University

Chunhua Zhu

Second Affiliated Hospital of Nanjing Medical University

Linyu Chen

Xi'an Jiaotong University

Xiaolin Zhang

Renji Hospital

Wei Zeng

Shanghai Jiao Tong University

Cooperative Institutions

Chinese Academy of Sciences

Hebei Medical University

Shanghai Electric (China)

North China Electric Power University

University of Chinese Academy of Sciences

Shanghai Jiao Tong University

State Grid Corporation of China (China)

Sun Yat-sen University

China Electric Power Research Institute

Peking University

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A Simple Online Fault Location and Tolerant Control Strategy for Power Electronic Transformers with a Single IGBT Open-Circuit Fault

IEEE Transactions on Power Electronics (2024)

Yuanhui Chen Jinwei He Yiwei Pan Rufeng Liu Ruiqi Wang

Insulated-gate bipolar transistor

Power Electronics

10.1109/tpel.2024.3368691

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State Evaluation Method of Distribution Line Based on Improved Combination Weighting Method

2022 7th Asia Conference on Power and Electrical Engineering (ACPEE) (2022)

Zongjie Liu Zhen Dong Bin Xu Chi Zhang Huifen Zhang

In order to fully understand the operation trend of distribution lines and improve the safety and stability of line operation, a state evaluation method of distribution line based on improved combination weighting method is proposed. Firstly, determining the 5 upper-level indexes and 15 lower-level indexes of the distribution line, and calculating the scores of the bottom-level indexes according to the basic operating datas of the line and the scoring formula determined by the membership function. Secondly, the subjective weight of the index is obtained by using the improved analytic hierarchy process (AHP) method, the objective weight of the index is obtained by using the variation coefficient (VC) method, and the comprehensive weight of the index is obtained by using the combination weighting method, thereby, the score of the upper-level index is obtained. Finally, the operation of the line is evaluated through the defined health standards. The actual research on a certain distribution line confirms that the proposed method can evaluate the distribution line effectively.

Line (geometry)

Weight distribution

10.1109/acpee53904.2022.9784047

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Citations (1)

Ultrasound-based artificial intelligence model for prediction of Ki-67 proliferation index in soft tissue tumors

Academic Radiology (2024)

Xinpeng Dai Haiyong Lu Ao Wang Yujia Liu Jiangnan Zang

Proliferation index

10.1016/j.acra.2024.09.067

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Research on Multi-source Traffic Flow Data Fusion Based on Linear Regression: A Case Study in Mega-city

Xiaoquan Wang Chunfu Shao Xun Ji Zongjie Liu Yuan Yuan

Data fusion of traffic parameters such as speed and density is a crucial study in intelligent transportation system, yet complicated to formulate mathematically.The aim of this paper is to study and model the multi-source fusion traffic flow data.Based on the data detected in a mega-city, the regression model is developed to solve the defects in the traditional models in this paper.The result demonstrates that the proposed models can pass the effectiveness test and have a favorable fusion effect, whose fusion result can meet the demand for precision.Apart from the accuracy demand, the proposed models can solve the fusion problem briefly and effectively so that it can be used in the practical engineering application.This study concludes that the proposed model has expressed well the data fusion for the practical multi-source data detected in the mega-city, which proves the model has good effectiveness and applicability.

Mega-

10.2991/ame-16.2016.210

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Inverter open circuit fault diagnosis strategy based on KNN algorithm

Changli Shi Yichen He Qunhai Huo Zongjie Liu Han Xue

10.1109/ipemc-ecceasia60879.2024.10567454

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A case report of secondary parathyroid adenomatous hyperplasia with carcinoma

Medicine (2022)

Simei Chen Xin Sui Bingxin Zhao Zongjie Liu Xinpeng Dai

Introduction: Secondary parathyroid hyperplasia canceration is very rare and thus easily be overlooked during parathyroid ultrasound examination. However, secondary parathyroid hyperplasia still has the possibility of canceration, and it is still important to be alert to its occurrence when performing ultrasound examinations and clinical treatment. Patient concerns: A 49-years-old man visited our outpatient department with generalized weakness and pain in both lower extremities a month ago. Diagnosis: Hyperparathyroidism secondary to chronic renal failure. Interventions: The patient underwent ultrasound and other preoperative examinations. The preoperative ultrasound showed 3 parathyroid enlargements, 2 on the left and 1 on the right. The patient then underwent surgical treatment. Outcomes: Ultrasonography suggested the presence of 3 parathyroid hyperplasias, and ectopic right inferior parathyroid gland was visible during intraoperative examination. 10 days after surgery, the patient’s Parathyroid Hormone returned to the normal range. Conclusion: Secondary parathyroid hyperplasia has the potential to become cancerous, so doctors should be alert to its occurrence when conducting ultrasound examinations. Ultrasound examination is the key to its diagnosis and subsequent treatment.

Parathyroid carcinoma

Outpatient clinic

Parathyroid gland

10.1097/md.0000000000031362

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Multi-Ports Unified Power Quality Conditioner for Active Distribution Network

Hai Zhang Zongjie Liu Jianwei Han Xingjian Zhao Tao Xu

This paper proposes a novel multi-ports unified power quality conditioner (UPQC) and its control strategy for the active distribution network. Topological wise, it is composed of multiple dynamic voltage restorers (DVRs) connected into each head of feeder lines and the inter bus, and one active power filter (APF), where the multiple DVRs and APF share the same dc-link, Doing so, the multi-ports UPQC can be directly installed in the substation and save the number of dc-link capacitors and APFs. In view of its functionality, this novel UPQC can compensate the nodes voltage deviation and balances the output power between transformers in the popular parallel supply mode. The paper explains the detailed working principle and proposes a coordinated control scheme for this multi-ports UPQC. Furthermore, MATLAB/SIMULINK verified the performance of the proposed UPQC in 10kV active distribution network.

Active power filter

10.1109/spec55080.2022.10058302

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Comparative Analysis of Ferroresonance and Arc High Impedance Grounding Fault in High Voltage Transmission Line

2021 International Conference on Power System Technology (POWERCON) (2021)

Hai Zhang Jiwen Wang Zongjie Liu Jianwei Han Jinying Liu

Ferroresonance fault and arc high resistance grounding fault often occur in power system. The arc and excitation inductance in the two faults show nonlinear characteristics, resulting in the diversity of fault characteristics, which makes the traditional detection and identification methods invalid. Therefore, this paper models and analyzes the ferromagnetic resonance and arc high resistance grounding faults of transmission lines, simulates the electromagnetic transient of the two faults based on PSCAD software, and realizes the characteristic analysis of time-domain waveform, Volt-ampere characteristic curve and Fourier spectrum of the two faults.

High impedance

10.1109/powercon53785.2021.9697581

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Enhancement of Astaxanthin Bioaccessibility by Encapsulation in Liposomes: An In Vitro Study

Molecules (2024)

Li Pan Haojie Meng Jiaqi Li Zongjie Liu Dongsheng Zhang

Astaxanthin was encapsulated in liposomes by a thin layer dispersion and ultrasound method using soybean phospholipid. The digestion properties of liposomes for encapsulating astaxanthin were investigated in light of particle size, size distribution, zeta potential, and microstructure during in vitro digestion as a function of time. These results exhibited that the average particle size increased gradually with liposomal vesicles retained round shapes and a fairly uniform distribution after passage through the simulated gastric fluid digestion. The result revealed that astaxanthin-loaded liposomes were stable in low pH conditions. It was also found that the mixed micelles formed in a simulated intestinal fluid. The zeta potential of astaxanthin-loaded liposomes had a decrease in negativity after digestion. In comparison with free astaxanthin, there was an appreciable increase in the bioaccessibility of astaxanthin after encapsulation in liposomes. This enhancement can be attributed to more soluble astaxanthin in the mixed micelles for astaxanthin-loaded liposomes. It indicated that the barrier of the liposomal bilayer could inhibit astaxanthin fading and leaking after encapsulation in liposomes. These results provide useful information for designing more stable delivery systems in the gastrointestinal tract and improving the bioaccessibility of lipophilic nutraceuticals.

Zeta potential

10.3390/molecules29081687

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Passenger Distribution and Waiting Position Selection Model on Metro Station Platform

Zongjie Liu Dewei Li Xiaoquan Wang

It is very important to obtain the distribution of passengers awaiting the train, which partly determines the number of passengers in each car and the train dwell time.The aim of this paper is to study and model the dynamic distribution of passengers on metro station platforms prior to a train's arrival.First, in the paper we analyze and summarize the primary influencing factors on the position selection for passengers to await the train.Second, a position selection model for each passenger based on an utility function was developed.It is solved by using a successive distribution approach, which can express the waiting position selection process of each passenger before the arrival of a train.To improve the accuracy, an alternating fitting-approaching one by one method is used to calibrate the model.Finally, the model is validated by applying to an actual case.A field survey on Pinganli Station of Beijing Subway Line 4 was conducted.The distribution data during evening peak and off-peak hours was collected.The application result has shown that the fitting result during the evening peak is more effective than the off-peak.We conclude that this model has expressed well the waiting position selection process of each passenger before the arrival of a train, which proves the model has good effectiveness and applicability.

Position (finance)

10.2991/i3csee-16.2016.7

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Citations (8)