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Copyright of Journal of Aeronautical Materials is the property of Editorial Board of Journal of Aeronautical Materials 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.)

Copyright of Practical Pharmacy & Clinical Remedies is the property of Editorial Department of Practical Pharmacy & Clinical Remedies 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.)

Copyright of Automobile Technology is the property of Automobile Technology 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.)

Copyright of Electronic Communication & Computer Science is the property of Omniscient Pte. Ltd. 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.)

Non-suicidal self-injury (NSSI) in adolescents has gradually become a mental and psychological problem around the world. Globally, the detection rate of NSSI is yearly increasing, and the detection group is also becoming younger. Different from the previous traditional views, NSSI not only exists in the people with affective disorders or psychotic disorders, but may also be present in the people with conduct disorders, substance use disorders, and neurodevelopmental disorders. Its characteristics and neurophysiological mechanisms are also different from pure suicidal behavior and ideation. Adolescents with NSSI often have difficulties and problems in academic performance and social interaction, and these problems are often related to executive dysfunction. There are many components of executive functions, and the impairment of different components indicates that the individual has corresponding dysfunction. Recent research has found that executive dysfunction, including impairments of attention, working memory, and inhibition, is associated with the occurrence of NSSI, and even indicates the occurrence of NSSI in the future. In addition, more and more studies have also confirmed that compared with the normal group, there are differences in brain functions and structures in the NSSI group. In these studies, some researchers have applied executive function-related paradigms and obtained the evidence in task-functional MRI and neuroelectrophysiology. This article reviews the research on executive dysfunction and its neural mechanisms in adolescents with NSSI in recent years. [ABSTRACT FROM AUTHOR]

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department 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.)

Copyright of Electric Drive is the property of Electric Drive 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.)

Copyright of Mechanical & Electronic Control Engineering is the property of Omniscient Pte. Ltd. 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.)

Copyright of Command Control & Simulation / Zhihui Kongzhi yu Fangzhen is the property of Command Control & Simulation 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.)

Aiming at the output power fluctuation and unbalanced impeller load caused by wind shear effect in the high wind speed region of large wind turbines, an independent pitch control strategy based on the power and load dual-objective synergy of power and load based on the weight coefficient method was proposed for NREL's 5 MW land-based wind turbine from both power and load dimensions. First, the PID(proportional integral derivative) optimized by genetic algorithm was used as the main controller to get the uniform variable pitch angle through the wind turbine speed feedback. Then, the dynamic weight coefficient of each blade was obtained according to the azimuth angle feedback to adjust the pitch angle of each blade. Finally, the blade root waving moment was fed to the fuzzy PID controller to get the pitch angle fine-tuning under the influence of load, and the pitch angle was corrected. The proposed control strategy was compared and analyzed with the unified pitch control and independent pitch PI control through the joint simulation of FAST and MATLAB/ Simulink platforms. The results show that the proposed control strategy can effectively stabilize the output power near the rated power and has a significant effect on reducing the unbalanced load of the wind turbine. [ABSTRACT FROM AUTHOR]

Copyright of Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press 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.)

The stability of wind turbine output power is seriously affected by the uncertainty of wind turbine model and external disturbances such as wind speed. The control strategy based on accurate fan parameters is difficult to meet the control requirements of the system. Therefore, a fan pitch controller based on the DDPG algorithm was proposed. With the advantage that reinforcement learning only needs to interact with the environment without modeling, the fan model was taken as the training environment, the power was taken as the reward target, and the paddle angle was taken as the output. The deep neural network was used to build the actor-critic unit to train the optimal paddle variable strategy. Three typical wind conditions, namely step, low turbulence and high turbulence, were used to test the algorithm. The simulation results showed that the controller based on the DDPG algorithm had better control accuracy, overshoot and regulating time than the traditional proportional-integral-differential controller under different wind conditions. [ABSTRACT FROM AUTHOR]

Copyright of Electric Power Engineering Technology is the property of Editorial Department of Electric Power Engineering Technology 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.)

Copyright of Biotechnology Bulletin is the property of Biotechnology Bulletin 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.)

Copyright of Natural Gas & Oil is the property of Editorial Department of Natural Gas & Oil 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.)

Copyright of Forest Engineering is the property of Forest Engineering 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.)

Copyright of Tobacco Science & Technology is the property of Tobacco Science & Technology 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.)

Copyright of Electric Power Engineering Technology is the property of Editorial Department of Electric Power Engineering Technology 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.)

Copyright of Science Technology & Engineering is the property of Chinese Society of Technology Economics 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.)

Copyright of Advanced Engineering Science / Gongcheng Kexue Yu Jishu is the property of Advanced Engineering Science 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.)

Aiming at the problems of the high frequency chattering and poor robustness in the speed estimation strategy of the traditional super twisting sliding mode observer(STSMO), an improved fuzzy super twisting sliding mode observer for speed observation of permanent magnet synchronous motor was proposed. Firstly, a normalized feedforward phase-locked loop was used to extract the rotor position and speed to avoid the accumulation of observation errors when the given speed is ramp. Secondly, the super twisting sliding mode observer and fuzzy controller were combined, and the fuzzy rules were introduced to adjust the sliding mode gain online, so as to improve the observation accuracy and robustness of the system and suppress the high frequency chattering. Finally, MATLAB/ Simulink simulation software was used to verify the proposed strategy, and the simulation results show that compared with the traditional super twisting sliding mode observer, the improved fuzzy super twisting sliding mode observer has higher observation accuracy and chattering phenomenon is suppressed. When subjected to external load disturbance or internal parameter perturbation, the system has strong robustness. [ABSTRACT FROM AUTHOR]

Objective: To evaluate the validity and reliability of the Limited Prosocial Emotion Questionnaire (LPEQ) in school-aged children with attention deficit hyperactivity disorder ( ADHD) . Methods: A total of 243 children with ADHD diagnosed by criteria of the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edi tion ( DSM-5) were selected. Parents filled out the LPEQ to assess their child's limited prosocial emotions, and completed the SNAP-IV rating scale, the Strength and Difficulties Questionnaire ( SDQ) and the Inventory of Callous-Unemotional Traits (ICU) as the concurrent scale for LPEQ. And 33 parents were selected to completed LPEQ retest after 2 weeks. Results: The scale was shown to be one dimensional (explained variance = 57. 5 % ) . The LPEQ total scores were positively correlated with the scores of impulsive-hyperactivity and oppositional defiant factors of SNAP-IV (r =0. 36 -0.47, P <0. 01), callousness and uncaring factors and total scores of ICU (r = 0.48 -0. 63, P <0. 01) and behavioral problems and prosocial factors of SDQ (r =0. 40 - 0. 46, P <0. 01) . LPEQ has good dis criminate validity among ADHD-comorbid and ADHD-only group. The Cronbach's a coefficient was 0. 84 and the test-retest reliability was 0. 81. Conclusion: The Chinese version of Limited Prosocial Emotion ( LPEQ) shows good validity and reliability in evaluating the school-age children with ADHD. [ABSTRACT FROM AUTHOR]

Copyright of Natural Gas & Oil is the property of Editorial Department of Natural Gas & Oil 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.)

Copyright of Electronic Communication & Computer Science is the property of Omniscient Pte. Ltd. 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.)

Copyright of Electronic Communication & Computer Science is the property of Omniscient Pte. Ltd. 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 the face of frequency change caused by system power fluctuation, the ability of wind turbine to provide inertial support for the system and participate in the primary frequency regulation of the system is different under different wind speeds. Under low wind speed, when the system frequency drops, the power system frequency has the risk of secondary drop after the doubly fed wind turbine provides frequency response; When the wind speed is too high, the rotor speed of wind turbine is difficult to improve, and the pitch angle frequency modulation speed is slow and the accuracy is low. Based on this, the frequency optimization strategy of variable speed wind turbine participation system based on ultracapacitor is proposed. The super capacitor module is connected to the DC bus of doubly fed wind turbine generator. Considering the characteristics of wind turbine participating in system frequency modulation under different wind speeds, the virtual inertia coefficient and energy storage control coefficient are optimized. The problem that it is difficult for the wind turbine to participate in the system frequency modulation at the critical rotor speed is solved, and the optimal power output can be carried out when participating in the system frequency modulation at different wind speeds, which improves the ability of the wind turbine to participate in the system primary frequency modulation. Finally, the effectiveness of the proposed control strategy is verified by simulation experiments. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Pesticide Science / Nongyaoxue Xuebao is the property of Chinese Journal of Pesticide Science 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.)

Copyright of Electronic Communication & Computer Science is the property of Omniscient Pte. Ltd. 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.)

Copyright of Electronic Communication & Computer Science is the property of Omniscient Pte. Ltd. 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.)

Copyright of Journal of Hebei University of Science & Technology is the property of Hebei University of Science & Technology, Journal of Hebei University of Science & Technology 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.)

Copyright of Journal of Kunming Medical University / Kunming Yike Daxue Xuebao is the property of Kunming Medical Journal 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.)

Copyright of Electronic Communication & Computer Science is the property of Omniscient Pte. Ltd. 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.)

Copyright of Telecommunication Engineering is the property of Telecommunication Engineering 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.)

Objective:To evaluate the validity and reliability of the Diagnostic Infant and Preschool Assessment（DIPA） for diagnosing ADHD in preschoolers in China. Methods: DIPA was translated into Chinese and administered to 244 suspected ADHD preschoolers with attention deficit or hyperactivity related symptoms and 90 kindergarten students recruited from nearby community kindergarten.The clinical diagnose by senior chief psychiatrist according to Diagnostic and Statistical Manual of Mental Disorders was the gold standard as to explore the validity of DIPA. Four interviewers were included in the inter-rater reliability training.Fourteen days after the first DIPA interview,39 participants were evaluated by the second DIPA interview to assess the test-retest reliability.Results:Using clinical diagnose as the gold standard,the validity test showed that the sensitivity was 89% for pre-schooling ADHD, and the specificity was 96%.The inter-rater reliability was 0.79 and the test-retest reliability was0.89.Using clinical diagnose as the gold standard,the diagnostic consistency was 0.81.Conclusion:The Chinese version of DIPA has good validity and reliability in diagnosing preschool ADHD. [ABSTRACT FROM AUTHOR]

[Objective] The present paper aimed to study the differences in the basic aroma components of different styles of cigarettes. [Method] The alkaline flavor components of 13 different styles of cigarettes were determined by simultaneous distillation extraction and gas chromatography-mass spectrometry. The analysis of 12 basic aroma components was carried out by analysis of variance, principal component analysis and cluster analysis. [Result](i) From the results of analysis of variance, it was found that there was no significant difference between M-type cigarettes for the total amount of pyridine, 2, 5-dimethylpyrazine, 3-ethylpyridine and basic aroma components;Pyrazine, 3-methylpyridine, 2, 6-lutidine, 2, 5-dimethylpyrazine, 2, 3-dimethylpyrazine, 2, 5-lutidine, 2-methyl Quinoquinoline, M-type cigarettes and most other types of cigarettes have significant differences;(ii) From the results of principal component analysis, 12 basic aroma components can be simplified into four main components, resulting in differences between different styles of cigarettes Mainly reflected in the content of pyridine, 2-methylpyrazine, 3-methylpyridine, 3-ethylpyridine, quinoline, 3-phenylpyridine;(iii) From the results of cluster analysi, , it can be divided into different styles of cigarettes for 8 categories, the same category of cigarettes can be divided into one category, the classification of different styles of cigarettes is good, the results of cluster analysis are basically consistent with the results of principal component analysis, indicating that alkaline flavor components can be used to distinguish different styles of cigarettes. [Conclusion] In order to study the differences of cigarettes of different styles, it provides a basis for the construction of Chinese cigarettes and the analysis of style characteristics. [ABSTRACT FROM AUTHOR]

Copyright of Systems Engineering & Electronics is the property of Journal of Systems Engineering & Electronics Editorial Department 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.)

Copyright of Journal of Aeronautical Materials is the property of Editorial Board of Journal of Aeronautical Materials 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.)

Copyright of Systems Engineering & Electronics is the property of Journal of Systems Engineering & Electronics Editorial Department 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.)