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Posttraumatic stress symptoms among Chinese university students during the COVID-19 pandemic:Prevalence,correlates,and mental health help-seeking

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World Journal of Psychiatry 2025年第1期15卷 145-152页

作者： Rui-Yao Wu lin-feng Ge Bao-Liang Zhong Department of Psychiatry The Affiliated Wuhan Mental Health CenterTongji Medical College of Huazhong University of Science&TechnologyWuhan 430012Hubei ProvinceChina Department of Psychiatry Wuhan Mental Health CenterWuhan 430012Hubei ProvinceChina

BACKGROUND Revisiting the epidemiology of posttraumatic stress symptoms(PTSSs)among university students during the coronavirus disease 2019(COVID-19)pandemic as well as understanding the mental health help-seeking behavior of individuals with PTSSs has critical implications for public mental health strategies in future medical *** To investigate the prevalence and correlates of PTSSs among university students during the first wave of the COVID-19 pandemic in China and to examine mental health help-seeking behaviors among these *** A total of 2507 Chinese university students were recruited via snowball *** students completed the Seven-item Screening Scale for Post-traumatic Stress Disorder during the first wave of the COVID-19 pandemic in ***-graphic characteristics,pandemic-related characteristics,and mental health help-seeking behaviors of students with PTSSs were also *** The prevalence of PTSSs among the participants was 28.0%.Seven significant correlates of PTSSs were identified(odds ratio=1.23-3.65,P≤0.024):Female sex,being 19 years old or older,living with others or alone,a low level of family economic status,fair or poor interpersonal relationships,severe or very severe local pandemic,and having family members diagnosed with ***,only 3.28%of the students with PTSSs reported seeking help from mental health *** the 23 students who sought help from mental health specialists,13 opted for online or telephone-based psychological *** Our data suggest that there was a high risk of PTSSs among university students and a high level of unmet mental health needs during the COVID-19 *** delivery of mental health services online or via telephone is a promising approach to address these unmet needs.

关键词： Posttraumatic stress symptoms University students COVID-19 Mental health help-seeking China

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《<黑格尔法哲学批判>导言》的原创性理论贡献

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河北大学学报（哲学社会科学版） 2025年第1期50卷 74-86页

作者：林锋北京大学马克思主义学院北京100871

《导言》是一部在马克思主义的形成史上占据重要地位的理论作品。值得肯定的是,该文对马克思主义的形成有多方面的重要原创性贡献,具体体现为:马克思主义“人的解放”理论的初步表述,历史唯物主义本体论的初步确立,马克思主义实践观、... 详细信息

《导言》是一部在马克思主义的形成史上占据重要地位的理论作品。值得肯定的是,该文对马克思主义的形成有多方面的重要原创性贡献,具体体现为:马克思主义“人的解放”理论的初步表述,历史唯物主义本体论的初步确立,马克思主义实践观、实践唯物主义世界观的初步表述,马克思主义哲学观的初步阐发,马克思主义世界历史观、社会形态演进学说的初步表述,马克思主义资本主义观的初步阐明,马克思主义无产阶级理论的初次表达。

关键词：《导言》马克思主义原创性理论贡献

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Global Asymptotic Synchronization of a Class of BAM Neural Networks with Time Delays via Integrating Inequality Techniques

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Journal of Systems Science & Complexity 2020年第2期33卷 366-382页

作者： lin feng ZHANG Zhengqiu Tourism College of Beijing Union University Beijing 100101China College of Mathematics and Econometrics Hunan UniversityChangsha 410082China

In this paper,the authors are concerned with global asymptotic synchronization for a class of BAM neural networks with time *** of using Lyapunov functional method,LMI method and matrix measure method which are recently widely applied to investigating global exponential/asymptotic synchronization for neural networks,two novel sufficient conditions on global asymptotic synchronization of above BAM neural networks are established by using a kind of new study method of global synchronization:Integrating inequality *** method and results extend the study of global synchronization of neural networks.

关键词： A class of BAM neural networks with time delays global asymptotic synchronization integrating inequality techniques

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Vanishing Results for the Cotton Tensor on Gradient Quasi-Einstein Solitons

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Acta Mathematica Sinica,English Series 2021年第4期37卷 588-596页

作者： lin feng WANG School of Science Nantong UniversityNantong 226007P.R.China

In this paper we study on gradient quasi-Einstein solitons with a fourth-order vanishing condition on the Weyl *** precisely,we show that for n≥4,the Cotton tensor of any ndimensional gradient quasi-Einstein soliton with fourth order f-divergence free Weyl tensor is flat,if the manifold is compact,or noncompact but the potential function satisfies some growth *** corollaries,some local characterization results for the quasi-Einstein metrics are derived.

关键词： Gradient quasi-Einstein soliton Cotton tensor Weyl tensor locally conformally flat

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Evaluation of Pt and Au pressure scales based on MgO absolute pressure scale

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Science China Earth Sciences 2017年第1期60卷 114-123页

作者： WU ZhongQing lin feng Laboratory of Seismology and Physics of Earth 's Interior School of Earth and Space Sciences University of Science and Technology of China Hefei 230026 China National Geophysical Observatory Mengcheng 233527 China

The equations of state(EOSs)of MgO produced by two independent scale-free methods,(1)the simultaneous elastic wave velocity and in situ synchrotron X-ray measurements(Kono et al.,2010;Li et al.,2006)and(2)the first-principles calculations(Wu et al.,2008),agree well with each other to at least 150 GPa and 2000 ***,the EOS from first-principles calculations also agrees well with shock wave data,another pressure-scale-free *** agreements strongly support that these EOSs provide reliable absolute pressure *** we evaluate Au and Pt EOSs based on the EOS of Wu et al.(2008)using the simultaneously measured volume data of MgO,Au,and Pt from the *** primary pressure scales developed by Tange et al.(2009)and Yokoo et al.(2009)using only pressure-scale-free experimental data of MgO,Au,and Pt produce internal consistent pressure and agree with EOS of Wu et al.(2008).The Au EOS by Tsuchiya(2003)works well at room temperature but underestimates pressure at high *** Au EOS by Fei et al.(2007)can well describe thermal *** EOSs of Pt by Holmes et al.(1989)and Ono et al.(2011)work well at both room temperature and high *** results also suggest that the discrepancy between bulk modulus of iron from experiments(Mao et al.,1990)and those from Earth's core(Dziewonski and Anderson,1981)is not originated from the overestimation of pressure by the EOS of Holmes et al.(1989).At high pressure and temperature,pressure uncertainty resulted from volume error becomes similarly important as the accuracy of the pressure scale.

关键词： P-V relation ab initio calculation Pressure standard Clapeyron slope

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Design and construction of a continuous pilot flotation facility:A case study for water-based oil sand extraction

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Petroleum Research 2023年第3期8卷 309-315页

作者： feng lin Natural Resources Canada CanmetENERGYDevonAlbertaT9G 1A8Canada

In this work,the design and construction of a continuous and pilot-scale flotation facility are *** performance of the new facility was evaluated from series of pilot flotation tests,carried out using oil sands slurry to extract bitumendan extra-heavy form of *** indicated that bitumen recoveries of the new pilot plant for an identical ore and water chemistry were largely dependent on air injection method,slurry conditioning time,flotation residence time,and slurry ***,when compared with those of bitumen extraction tests using a bench-scale Batch Extraction Unit(BEU)operated at the most optimal conditions,it was suggested that the new pilot plant produced flotation recoveries of bitumen and froth qualities at a level as good as,or even higher than,the level accomplished using the BEU at an identical ore,water chemistry and operating *** continuous,pilot flotation plant could potentially serve as a pre-commercial production system that verifies a new processing aid,or as an alternative extraction technology for oil sand,coal,and mineral processing.

关键词： Enhanced oil recovery Flotation Pilot facility Minerals processing Bitumen extraction

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P-doped electrode for vanadium flow battery with high-rate capability and all-climate adaptability

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Journal of Energy Chemistry 2019年第8期28卷 55-59,I0003页

作者： Lihong Yu feng lin lin Xu Jingyu Xi School of Applied Chemistry and Biological Technology Shenzhen PolytechnicShenzhen 518055 Guangdong China Institute of Green Chemistry and Energy Graduate School at Shenzhen Tsinghua UniversityShenzhen 518055 Guangdong China

A phosphorous-doped graphite felt(PGF) is fabricated and examined as electrode for vanadium flow battery(VFB). P doping improves the electrolyte wettability of GF and induces more defect sites on its surface, resulting in significantly enhanced activity and reversibility towards VO2^+/VO2^+ and V^2+/V3^+couples. VFB with PGF electrode demonstrates outstanding performance such as high-rate capability under 50–400 mA cm^-2, wide-temperature tolerance at-20 °C–60 °C, and excellent durability over 1000 charge–discharge cycles. These merits enable PGF a promising electrode for the next-generation VFB,which can operate at high-power and all-climate conditions.

关键词： Vanadium flow battery Graphite felt P doping High-power electrode All-climate

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Network Robustness Depth and Topology Management of Networked Dynamic Systems

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Journal of Systems Science & Complexity 2016年第1期29卷 1-21页

作者： WANG Leyi lin feng YIN George Department of Electrical and Computer Engineering Wayne State University Department of Mathematics Wayne State University

Networked control systems are subject to adversary conditions that affect their network *** ensure reliable system operations,network topologies need to be characterized and managed for their impact on the overall system *** paper introduces the concept of network robustness depth for this *** event systems are used as a foundation to model dynamic behavior of network topologies,support their analysis,and carry out their *** analysis relates the link reliability probabilities to a probabilistic characterization of network robustness *** topology management strategies are discussed,including passive methods,random strategies,and optimization *** respective benefits and limitations are *** using platoon control as a platform of hybrid(continuous and discrete event) systems and packet erasure channels as a communication protocol,the results are demonstrated with case studies.

关键词： Network depth network topology robustness

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Fast Parallel Algorithm for Slicing STL Based on Pipeline

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Chinese Journal of Mechanical Engineering 2016年第3期29卷 549-555页

作者： MA Xulong lin feng YAO Bo Key Laboratory for Advanced Materials Processing Technology Ministry of Education of China Tsinghua University Department of Mechanical Engineering Army Aviation Institute of PLA

In Additive Manufacturing field, the current researches of data processing mainly focus on a slicing process of large STL files or complicated CAD models. To improve the efficiency and reduce the slicing time, a parallel algorithm has great advantages. However, traditional algorithms can＇t make full use of multi-core CPU hardware resources. In the paper, a fast parallel algorithm is presented to speed up data processing. A pipeline mode is adopted to design the parallel algorithm. And the complexity of the pipeline algorithm is analyzed theoretically. To evaluate the performance of the new algorithm, effects of threads number and layers number are investigated by a serial of experiments. The experimental results show that the threads number and layers number are two remarkable factors to the speedup ratio. The tendency of speedup versus threads number reveals a positive relationship which greatly agrees with the Amdahl＇s law, and the tendency of speedup versus layers number also keeps a positive relationship agreeing with Gustafson＇s law. The new algorithm uses topological information to compute contours with a parallel method of speedup. Another parallel algorithm based on data parallel is used in experiments to show that pipeline parallel mode is more efficient. A case study at last shows a suspending performance of the new parallel algorithm. Compared with the serial slicing algorithm, the new pipeline parallel algorithm can make full use of the multi-core CPU hardware, accelerate the slicing process, and compared with the data parallel slicing algorithm, the new slicing algorithm in this paper adopts a pipeline parallel model, and a much higher speedup ratio and efficiency is achieved.

关键词： additive manufacturing STL model slicing algorithm data parallel pipeline parallel

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Fe、Ir掺杂MoS_(2)表面对N_(2)气敏吸附与解离反应性能提升的第一性原理研究

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原子与分子物理学报 2025年第1期42卷 13-19页

作者：肖香珍胡林峰张建伟河南科技学院新乡453003

基于第一性原理方法,采用周期性平板模型,研究了N_(2)分子在掺杂体系TM-MoS_(2)(TM=Fe、Ir)表面的吸附和解离行为.研究表明:N_(2)分子在TM-MoS_(2)(TM=Fe、Ir)表面吸附能依次为0.62和0.47 eV,而完整MoS_(2)表面的吸附能只有0.08 eV,说... 详细信息

基于第一性原理方法,采用周期性平板模型,研究了N_(2)分子在掺杂体系TM-MoS_(2)(TM=Fe、Ir)表面的吸附和解离行为.研究表明:N_(2)分子在TM-MoS_(2)(TM=Fe、Ir)表面吸附能依次为0.62和0.47 eV,而完整MoS_(2)表面的吸附能只有0.08 eV,说明掺杂之后对N_(2)表现出略好的吸附性能.差分电荷密度分析表明,N_(2)吸附后,掺杂Fe、Ir原子与两个N原子之间电荷有所增加,N-N键之间的区域电荷密度减少,N-N键的强度减弱.态密度计算结果发现,N_(2)在吸附过程中,主要是N原子的2p_(y)、2p_(z)轨道与Ir的5d_(xy)和5d_(z^(2))以及Fe的3d_(xy)和3d_(z^(2))发生杂化作用.通过分析解离活化能,N_(2)在掺杂体系TM-MoS_(2)(TM=Fe、Ir)表面解离需要活化能均较高,且远大于在相应掺杂表面的吸附能,说明N_(2)在掺杂体系TM-MoS_(2)(TM=Fe、Ir)表面解离应该表现为分子吸附或脱附.

关键词： Fe、Ir 掺杂单层MoS_(2) N_(2) 吸附与解离活化能密度泛函理论

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