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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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DESIGN OF NONCIRCULAR GEARS WITH DISCONTINUOUS PITCH CURVE

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Chinese Journal of Mechanical Engineering 2006年第4期19卷 594-599页

作者： ZHANG rui wu Xutang School of Mechanical Engineering Xi＇an Jiaotong University Xi＇an 710049 China

When the noncircular gear pair is applied to the continuously variable transmission （CVT） with gear, the transmission ratio function is discontinuous. In accordance with this unique characteristic, a new approach to design and analyze noncircular gears with discontinuous pitch curve is proposed. The design courses of various noncircular gear pairs with discontinuous pitch curve are unified based on the numerical algorithm of spline fitting and ＂fairing boundary condition＂. According to the particularity of discontinuous pitch curve, the rules and procedures for teeth distribution are recommended. It is explained in detail why the undercut is formed and how to manage the undercut based on meshing *** addition, the calculation formulas for each tooth profile segment are also derived. If the tooth profile data are calculated, the measurement and the incision process for noncircular gear can be conducted and the CAD simulation can be achieved easily. To ensure the continuity of the transmission, the transmission interference of the tooth which is located at the pitch curve joint point is managed by utilizing Bezier curve with CAD software. And the contact ratio of gear pair is obtained. The case study shows that this approach is successful and opens up a new way for the design of noncircular gear.

关键词： Noncircular gears Continuously variable transmission(CVT) Tooth profile

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Selection diagram of design algorithms for neutron-focusing supermirrors

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Nuclear Science and Techniques 2022年第8期33卷 106-117页

作者： Wen-Bo Mo Hua-rui wu Xue-wu Wang Department of Engineering Physics Tsinghua UniversityBeijing 100084China Key Laboratory of Particle Radiation Imaging(Tsinghua University) Ministry of EducationBeijing 100084China

The neutron supermirror is an important neutron optical device that can significantly improve the efficiency of neutron transport in neutron guides and has been widely used in research neutron *** types of algorithms,including approximately ten algorithms,have been developed for designing high-efficiency supermirror *** addition to its applications in neutron guides,in recent years,the use of neutron supermirrors in neutronfocusing mirrors has been proposed to advance the development of neutron scattering and neutron imaging instruments,especially those at compact neutron *** this new application scenario,the performance of supermirrors strongly affects the instrument performance;therefore,a careful evaluation of the design algorithms is *** this study,we examine two issues:the effect of nonuniform film thickness distribution on a curved substrate and the effect of the specific neutron intensity distribution on the performance of neutron supermirrors designed using existing *** effect of film thickness nonuniformity is found to be relatively insignificant,whereas the effect of the neutron intensity distribution over Q(where Q is the magnitude of the scattering vector of incident neutrons)is *** diagrams that show the best design algorithm under different conditions are obtained from these *** the intensity distribution is not considered,empirical algorithms can obtain the highest average reflectivity,whereas discrete algorithms perform best when the intensity distribution is taken into *** reasons for the differences in performance between algorithms are also *** findings provide a reference for selecting design algorithms for supermirrors for use in neutron optical devices with unique geometries and can be very helpful for improving the performance of focusing supermirror-based instruments.

关键词： Neutron-focusing supermirror Design algorithm Thickness nonuniformity Intensity distribution over Q Selection diagram

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Mobilities and leachabilities of heavy metals in sludge with humus soil

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Journal of Environmental Sciences 2011年第2期23卷 247-254页

作者： rui Zhu Min wu Jian Yang State Key Laboratory of Pollution Control and Resources Reuse Tongji University Shanghai 200092 China.

Chemical forms of Zn, Ni, Cu, and Pb in municipal sewage sludge were investigated by adding humus soil to sludge and by performing sequential extraction procedures. In the final sludge mixtures, Zn and Ni were mainly found in Fe/Mn oxide-bound （F3） and organic matter/sulfide-bound （F4） forms. For Zn, exchangeable （F1）, carbonate-bound （F2）, and F3 forms were transformed to F4 and residual forms （F5）. For Ni, F1 and F2 forms were transformed to F1, F2, and F3 forms. Both Cu and Pb were strongly associated with the stable forms F4 and F5. For Cu, F2 and F3 forms were major contributors, while for Pb, F3 and F4 forms were major contributors to F5. Humus soil dosage and pH conditions in the sludge were strongly correlated with the forms of heavy metals. Five forms were used to evaluate metal mobilities in the initial and final sludge mixtures. The mobilities of the four heavy metals studied decreased after 28 days. The metal mobilities in the final sludge mixtures were ranked in the following order： Ni 〉 Zn 〉 Cu = Pb. Leaching tests showed that the mobilities of Zn and Ni in lower pH conditions （pH 4） were higher than those in higher pH conditions （pH 8）.

关键词： sludge heavy metal humus soil mobility leachability

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Preface to the Special Issue:Advanced Magnesium Alloys

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Acta Metallurgica Sinica(English Letters) 2023年第2期36卷 177-178页

作者： rui-Zhi wu Yong Liu Key Laboratory of Superlight Materials and Surface Technology Ministry of EducationHarbin Engineering UniversityHarbin150001China Key Laboratory of Lightweight and High Strength Structural Materials of Jiangxi Province School of Advanced ManufacturingNanchang UniversityNanchang330031China

Magnesium alloy is internationally recognized as one of the most promising lightweight materials,known as the“green engineering metal in twenty-first century”.The outstanding effect of magnesium alloy in structural weight reduction is not only expected to solve the urgent lightweighting problem in key equipment and major projects,but also anticipated to play an important role in achieving the goal of carbon peak and carbon ***,an increasing number of researchers are devoting to research on magnesium alloys with structural and functional properties.

关键词： alloy properties alloys

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Examination of two-phase behaviors in porous media during pool boiling

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Science China(Technological Sciences) 2024年第6期67卷 1695-1713页

作者： ZHANG ZhiHao GUAN ShuYa wu rui ZHAO ChangYing School of Mechanical Engineering Shanghai Jiao Tong University

The enhancement of pool boiling heat transfer using porous media has been extensively *** the two-phase distribution and evolution in porous media are crucial to the heat transfer performance,including the critical heat flux(CHF)and heat transfer coefficient(HTC),direct observation of the two-phase flow inside the media is limited owing to the blockage of the direct view from the porous *** this study,pool boiling visualization experiments were conducted on porous samples with different throat widths in deionized *** results showed that the HTC increased with the throat ***,the growth-contraction cycle of the vapor region and the formation and drying of the wall liquid film inside the porous media were *** vapor region,including the maximum and minimum areas in the boiling cycle,was quantitatively ***,the relationship between the minimum gas-phase area and HTC peak was identified.A one-dimensional transient model was developed considering solid skeleton heat conduction,liquid film evaporation,and vapor region growth to quantitatively study the influence of heat flux on the internal two-phase *** model successfully captured the maximum gas-phase area,duration of boiling cycles,and HTC trends at specific heat *** results of this quantitative study provide insights into the internal two-phase distribution and evolution induced by pool boiling.

关键词： porous media two-phase behaviors pool boiling

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Network boundary recognition via relative azimuth angle

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The Journal of China Universities of Posts and Telecommunications 2010年第4期17卷 31-41页

作者： JIA rui-wu SHI Geng-chen National Lab of Mechatronic Engineering and Control Beijing Institute of Technology Beijing 100081 China

To recognize the boundary of wireless networks to meet some specific needs, relative azimuth angles of nodes distributed in the 1-hop neighborhood of each node in one network were used to recognize the boundary of the network. A novel recognition algorithm based on local generalized convex hull was proposed for one node to decide if it self is a boundary node. The flexibility, efficiency and consistency of the algorithm are shown in its performance by extensive simulations.

关键词： wireless sensor network boundary point generalized convex hull relative azimuth angle θ-hull

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Secretion of nerve growth factor,brain-derived neurotrophic factor,and glial cell-line derived neurotrophic factor in co-culture of four cell types in cerebrospinal fluid-containing medium

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Neural Regeneration Research 2012年第36期7卷 2907-2914页

作者： Sanjiang Feng Minghua Zhuang rui wu Department of Neurosurgery First Affiliated Hospital of Shantou University Medical College Department of Hematology Second Affiliated Hospital of Shantou University Medical College

The present study co-cultured human embryonic olfactory ensheathJng cells, human Schwann cells, human amniotic epithelial cells and human vascular endothelial cells in complete culture medium- containing cerebrospinal fluid. Enzyme linked immunosorbent assay was used to detect nerve growth factor, brain-derived neurotrophic factor, and glial cell line-derived neurotrophic factor secretion in the supernatant of co-cultured cells. Results showed that the number of all cell types reached a peak at 7-10 days, and the expression of nerve growth factor, brain-derived neurotrophic factor, and glial cell line-derived neurotrophic factor peaked at 9 days. Levels of secreted nerve growth factor were four-fold higher than brain-derived neurotrophic factor, which was three-fold higher than glial cell line-derived neurotrophic factor. Increasing concentrations of cerebrospinal fluid （10%, 20% and 30%） in the growth medium caused a decrease of neurotrophic factor secretion Results indicated co-culture of human embryonic olfactory ensheathing cells, human Schwann cells human amniotic epithelial cells and human vascular endothelial cells improved the expression of nerve growth factor, brain-derived neurotrophic factor, and glial cell line-derived neurotrophic factor. The reduction of cerebrospinal fluid extravasation at the transplant site after spinal cord injury is beneficial for the survival and secretion of neurotrophic factors from transplanted cells.

关键词： olfactory ensheathing cells Schwann cells amniotic epithelial cells vascular endothelial cells nerve growth factor brain-derived neurotrophic factor glial cell line-derived neurotrophic factor cerebrospinal fluid regeneration neural regeneration

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Analysis on Traditional Chinese Medicine syndrome elements and relevant factors for senile diabetes

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Journal of Traditional Chinese Medicine 2013年第4期33卷 473-478页

作者： Junping Wei rui wu Dandan Zhao Department of Endocrinology Guang'anmen Hospital China Academy of Chinese Medical Sciences Department of Endocrinology South Area of Guang'anmen Hospital China Academy of Chinese Medical Sciences Preclinical Medicine School Beijing University of Chinese Medicine

OBJECTIVE: To explore the laws governing the distribution ofTraditional Chinese Medicine (TCM) syndrome elements (SEs) of senile diabetes (SD) and their relationship to relevant factors. METHODS: An investigation of patients who met the inclusion criteria was conducted by trained doctors, using case report forms. All related data were collected, including body mass index, glycated hemoglobin, illness course, complications, symptoms, and tongue and pulse manifestation. The SEs of each patient were judged by three qualified associate chief physicians independently. RESULTS: The main SEs of SD are Yin deficiency, Qi deficiency, blood stasis, and phlegm turbidity. Yindeficiency, Qi deficiency, blood stasis, and phlegm turbidity are most commonly seen among 4-SE combinations. Yang deficiency is typically related to illness course and BMI, phlegm turbidity to hypertension and hyperlipidemia, excessive heat to diabetic microangiopathy, and blood stasis to illness course and diabetic macroangiopathy. CONCLUSION: SD pathogenesis has a deficiency in origin and excess in superficiality. Deficiency syndrome mainly manifests as deficiency of both Qi and Yin, and concurrently in Yang deficiency. Excess syndrome is characterized by blood stasis and phlegm turbidity. SEs analysis provides a basis for the prevention and treatment of SD with TCM and lays the foundation for objectively evaluating multicentric clinical research for SD inTCM.

关键词： Diabetes mellitus Aged Medicine Chinese traditional Syndrome complex

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Tumor suppressor p53 meets microRNAs

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Journal of Molecular Cell Biology 2011年第1期3卷 44-50页

作者： Zhaohui Feng Cen Zhang rui wu Wenwei Hu Department of Radiation Oncology Cancer Institute of New JerseyUniversity of Medicine and Dentistry of New JerseyNew BrunswickNJ 08903USA Department of Pediatrics Cancer Institute of New JerseyUniversity of Medicine and Dentistry of New JerseyNew BrunswickNJ 08903USA

Tumor suppressor p53 plays a central role in tumor *** a transcription factor,p53 mainly exerts its function through transcription regulation of its target genes to initiate various cellular *** maintain its proper function,p53 is tightly regulated by a wide variety of regulators in ***,p53,its regulators and regulated genes form a complex p53 network which is composed of hundreds of genes and their ***(miRNAs)are a class of endogenously expressed,small non-coding RNA molecules which play a key role in regulation of gene expression at the post-transcriptional *** studies have demonstrated that miRNAs interact with p53 and its network at multiple levels.p53 regulates the transcription expression and the maturation of a group of *** the other hand,miRNAs can regulate the activity and function of p53 through direct repression of p53 or its regulators in *** findings have demonstrated that miRNAs are important components in the p53 network,and also added another layer of complexity to the p53 network.

关键词： p53 tumor suppression microRNA

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