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[Introduction] The rapid development of new energy vehicles (NEVs) brings higher requirements for the power demand of highways. Based on the analysis of the power loads of highways, the photovoltaic endowment, and the energy storage technologies suitable for highway service areas in China, this paper explores the self-consistency of the highway transportation and energy integration mode of the PV-Storage-Charging integrated development path, and combines practical engineering project to demonstrate and analyze the feasibility of the highway transportation and energy integration mode. [Method] By analyzing the total mileage of highways in China, the market penetration rate of NEVs, and the PV & energy storage resources of highway transportation, based on the potential increase in highway power load due to the growth of NEVs and the utilization space of photovoltaic resources in highway transportation, a comprehensive energy utilization mode of PV-Storage-Charging for highway service areas was proposed. Combined with existing projects of self-consistent modes of transportation and energy integration, suggestions were proposed for the integrated development mode of highway PV-Storage-Charging. [Result] Data indicates that by 2025, the national stock of NEVs will exceed 25 million, consuming 37.5 TWh of electricity, showing tremendous potential for electricity demand. At the same time, the abundant photovoltaic resources along and around roads in China have a photovoltaic generation potential of approximately 1022.8 TW, while the calculated annual energy consumption of highway infrastructure is approximately 17.99 TW. [Conclusion] The main path of integration between transportation and energy should start with developing wind and photovoltaic natural resource endowments based on the infrastructure of road transportation itself, and forming a self-consistent supply of transportation energy systems, thereby constructing a distributed, green, renewable, and net zero-emission energy supply system for transportation systems. The integrated development path of PV-Storage-Charging transportation and energy integration can consume renewable energy locally, alleviate grid pressure while promoting the clean energy utilization of highways, showing immense potential. This paper can provide theoretical support and reference for the development of highway transportation and energy integration in China.

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Copyright of South Architecture / Nanfang Jianzhu is the property of South Architecture Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

BackgroundThe comprehensive research facility for fusion technology magnet performance research platform (MPRP) is a large-scale experimental platform established for advanced superconducting magnet experiments. The retrieval speed of MPRP historical data is slow due to massive storage.PurposeThe study aims to develop a MPRP data archiving system (MPDAS) and increase its retrieval speed.MethodsFirst of all, the experimental physics and industrial control system (EPICS) data archiving plug-in was designed for MPDAS. Both MongoDB Sharding and Replica Set mechanism were employed to build a highly scalable data storage architecture. Then, the core ideas of three traditional cache replacement algorithms, LRU (least recently used), LFU (least frequently used) and FIFO (first in first out) were drawn by MPDAS to establish a data temperature model based on Newton's law of cooling. A multi-dimensional feature data partitioning algorithm was implemented to integrate access time, access frequency and storage order, hence the hot and cold historical data were identified to realize data tiered storage. Finally, the retrieval speed of MPDAS was improved by preferentially accessing Redis when querying historical data, and selecting different retrieval strategies based on hit results and data integrity.ResultsThe system test results show that the functional characteristics of MPDAS meet the design requirements. Compared with FIFO, LRU, and LFU, the Redis hit rate of the MPDAS when the hot database stores 1% of the historical data is increased by 38.05%, 26.91%, and 11.06% respectively.ConclusionsBy increasing the hit rate of hot data, the average response time of data retrieval can be directly reduced. The retrieval response speed of MPDAS is effectively improved by quantifying the heat of historical data and dividing the heat and cold.

Copyright of Journal of Guangxi Normal University - Natural Science Edition is the property of Gai Kan Bian Wei Hui and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to solve the problem that the maximum power point of PV array is difficult to effectively track when the external environment condition changes, and the traditional method of MPPT (Maximum Power Point Tracking) often leads to search into the local extreme value and the problem of slow response, this paper proposes a FA (Firefly Algorithm) based variable step size MPPT algorithm, analyzes and improves the structure and parameters of traditional FA algorithm, and disperses the firefly initial position locating in the peaks of the possible voltage. In addition, scintillation degree is designed to adjust the firefly step size adaptively, so that FA algorithm can be more practical in MPPT control direction. Algorithm and the simulation results show that the algorithm can quickly and accurately track the maximum power point. Research conclusions effectively improve the efficiency of PV array output. [ABSTRACT FROM AUTHOR]

BACKGROUND: Chemotherapy drugs have been shown to penetrate the blood-brain barrier and cause neurotoxicity, further damaging nerve cells. OBEJCTIVE: To investigate the changes in the expression and morphology of hippocampal neurons in chemobrain, and to investigate the underlying mechanism of nerve regeneration in chemobrain. METHODS: The brain specimens were obtained from the six patients undergoing cancer chemotherapy and six patients without chemotherapy, and were then subdivided into two groups: < 60 years and > 60 years groups (n=3 per group). Immunofluorescence staining with specific antibodies was used to detect the changes in the morphology and number of neurons in the hippocampus CA1, CA2 and CA3. RESULTS AND CONCLUSION: The number of neurons positive for NeuN, DCX and PV in the hippocampal CA1, CA2 and CA3 in the chemotherapy group was significantly lower than that in the non-chemotherapy group. Moreover, the neurons positive for PV were smaller, with less and shorter nervous processes. Immunofluorescence staining findings showed that the < 60 years old patients in the chemotherapy group had less neurons positive for NeuN and DCX than that in the non-chemotherapy; for > 60 years old patients, there was no significant difference between two groups. These findings suggest that chemotherapy can downregulate the expression of immature neurons in the hippocampus and reduce the number of neurons in the hippocampus. Moreover, chemotherapy can change the morphology and reduce the number of PV neurons. [ABSTRACT FROM AUTHOR]

Aiming at the elastic hysteresis effect in rolling friction, the rolling friction behavior under different loads and velocities of HT200, 45# steel, PTFE and PA66 were studied through experiments on a self-made rolling friction testing equipment and the creep property of PTFE and PA66 were investigated by experiments on CETR UMT-2 and LKDM-2000 equipment. During experiments, the rule that the rolling friction force varies with velocities and loads was focused and the action mechanism that visco-elastic properties of materials influence the rolling friction was analyzed. In addition, the law that the rolling friction coefficient varies with velocities and loads was discussed at the same time. The results indicate that the rolling friction coefficient rises up with the increment of rolling velocities. The ratio of rolling friction coefficient of HT200, 45# steel, PTFE and PA66 was about 1:0.99:1.03:1.05. The rolling friction force was roughly proportional to the value of PV and the fitting-line slopes of PTFE and PA66 was apparently higher than that of HT200 and 45# steel. [ABSTRACT FROM AUTHOR]

To ensure PV running at the optimal stale, and to reduce the operation cost of large - scale PV connected to grid, this paper established the model of PV array, discussed the characteristics of PV array, and proposed the improved voltage perturbation method, which can keep PV running stably at the optimal state. It is a method that at the same time adopts the coordinate control strategy, which uses power outer loop and current inner control, to realize the PV array optimal power output to grid. In the PSCAD, the simulation results show that the control strategy of grid - connected PV is effective. [ABSTRACT FROM AUTHOR]

A method that PV-battery power generation system support the frequency of the grid was provided. The main design method was using fuzzy control to classify the real -time frequency of grid. Taking account of the grid current condition, the actual PV power output under different weather cases and the status of battery, specific operation mode was established. The functionality of providing or absorbing active power from grid was achieved by the cooperation between PV and battery. The feasibility of this simulation design was verified by the system testing. The results show that this design can realize the status transform between the different operation modes and the design has a great capability for supporting grid frequency. [ABSTRACT FROM AUTHOR]