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Parental Educational Expectations,Academic Pressure,and Adolescent Mental Health:An Empirical Study Based on CEPS Survey Data

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International Journal of Mental Health Promotion 2024年第2期26卷 93-103页

作者： Tao Xu Fangqiang Zuo kai zheng Department of Social Work College of International Education and Social DevelopmentZhejiang Normal UniversityJinhua321004China Department of Economics and International Trade School of EconomicsManagement&LawHubei Normal UniversityHuangshi435002China

Background:This study aimed to investigate the relationship between parental educational expectations and adolescent mental health problems,with academic pressure as a moderating variable.Methods:This study was based on the baseline data of the China Education Panel Survey,which was collected within one school year during 2013–2014.It included 19,958 samples from seventh and ninth graders,who ranged from 11 to 18 years old.After removing missing values and conducting relevant data processing,the effective sample size for analysis was 16344.The OLS(Ordinary Least Squares)multiple linear regression analysis was used to examine the relationship between parental educational expectations,academic pressure,and adolescents’mental health problems.In addition,we established an interaction term between parents’educational expectations and academic pressure to investigate the moderating effect of academic stress.Results:The study found that adolescents whose parents had high educational expectations reported less mental health problems.(β=−0.195;p<0.001).Additionally,adolescents who had high academic pressure reported more mental health problems.(β=0.649;p<0.001).Furthermore,the study found that academic pressure had a significant moderating effect on the relationship between parental educational expectations and adolescents’mental health problems(β=0.082;p<0.001).Conclusion:Parental educational expectations had a close relationship with adolescents’mental health problems,and academic pressure moderated this relationship.For those adolescents with high levels of academic pressure,the association between high parental educational expectations and mental health problems became stronger.On the contrary,for those adolescents with low levels of academic pressure,the association between high parental educational expectations and mental health problems became weaker.These findings shed new light on how parental educational expectations affected adolescent mental health problems and had significant implications for their healthy de

关键词： Parental educational expectations academic pressure adolescent mental health problems

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Synthesis and microwave absorption performance of heat-treated RF/SiO_(2)aerogels

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Defence Technology（防务技术） 2024年第4期34卷 177-186页

作者： Xinli Ye Hao Yu kai zheng Shan Li Xiaomin Ma Bangxiao Mao Junxiong Zhang School of Civil Aviation Northwestern Polytechnical UniversityXi’an 710072PR China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057PR China Yangtze River Delta Research Institute of Northwestern Polytechnical University Suzhou 215400PR China National Equipment New Material&Technology(Jiangsu)Co. LtdSuzhou 215400PR China Beijing Xinfeng Aerospace Equipment Co. LtdBeijing 100854PR China School of Textile and Clothing Nantong UniversityNantong 226019PR China

The well-designed composite with satisfactory electromagnetic microwave absorption at high temperatures remains a serious challenge.Herein,we fabricated a resorcinol-formaldehyde/silica dioxide composite aerogel(RF/SiO_(2))with a three-dimensional network structure using sol-gel,atmospheric pressure drying technique as well as heat-treated processes to achieve enhanced microwave absorption capabilities in the low frequency range.The pristine RF/SiO_(2)aerogel presented a typical micropores structure with a surface area,porous volume,and density of 146.82 m^(2)/g,62.40%,and 0.28 cm^(3)/g,respectively.Remarkably,the RF/SiO_(2)aerogel showed an effective absorption bandwidth of 3.56 GHz and a minimum reflection loss value of-46.10 d B at 2.25 mm after being heat-treated at 1500°C,while the maximum effective absorption bandwidth was 3.60 GHz at 2.30 mm.The intricate three-dimensional networks possessed remarkable impedance matching,multiple attenuation mechanisms,interfacial polarization,and dielectric loss,which were attributed to the exceptional ability to absorb electromagnetic microwaves.It offered a fresh approach to creating adaptable and effective microwave absorption materials in military defense.

关键词： RF/SiO_(2) Aerogel Heat-treated Microwave absorption

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Sol-gel derived B_(2)O_(3)-CaO borate bioactive glasses with hemostatic,antibacterial and pro-angiogenic activities

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Regenerative Biomaterials 2024年第1期3卷 108-118页

作者： kai zheng Faina Bider Mahshid Monavari Zhiyan Xu Christina Janko Christoph Alexiou Ana M.Beltran Aldo R.Boccaccini Jiangsu Province Engineering Research Center of Stomatological Translational Medicine College of StomatologyNanjing Medical UniversityNanjing 210029China Jiangsu Key Laboratory of Oral Diseases Nanjing Medical UniversityNanjing 210029China Institute of Biomaterials University of Erlangen-Nuremberg91058 ErlangenGermany Department of Oto-Rhino-Laryngology Head and Neck SurgerySection of Experimental Oncology and Nanomedicine(SEON)Else Kroener-Fresenius-Stiftung ProfessorshipUniversitaetsklinikum Erlangen91058 ErlangenGermany Departamento de Ingenier�ıa y Ciencia de los Materiales y del Transporte Escuela Politecnica

Sol-gel borate bioactive glasses(BGs)are promising ion-releasing biomaterials for wound healing applications.Here,we report the synthesis of a series of binary B_(2)O_(3)-CaO borate BGs(CaO ranging from 50 to 90mol%)using a sol-gel-based method.The influence of CaO content in B_(2)O_(3)-CaO borate BG on morphology,structure and ion release behavior was investigated in detail.Reduced dissolution(ion release)and crystallization could be observed in borate BGs when CaO content increased,while the morphology was not significantly altered by increasing CaO content.Our results evidenced that the ion release behavior of borate BGs could be tailored by tuning the B_(2)O_(3)/CaO molar ratio.We also evaluated the in vitro cytotoxicity,hemostatic,antibacterial and angiogenic activities of borate BGs.Cytocompatibility was validated for all borate BGs.However,borate BGs exhibited composition-dependent hemostatic,antibacterial and angiogenic activities.Generally,higher contents of Ca in borate BGs facilitated hemostatic activity,while higher contents of B_(2)O_(3) were beneficial for pro-angiogenic activity.The synthesized sol-gel-derived borate BGs are promising materials for developing advanced wound healing dressings,given their fast ion release behavior and favorable hemostatic,antibacterial and angiogenic activities.

关键词： borate glasses sol-gel processing glass composition wound healing

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Visible-light-enabled multicomponent synthesis of trifluoromethylated 3-indolequinoxalin-2(1H)-ones without external photocatalysis

Green Synthesis and Catalysis

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Green Synthesis and Catalysis 2024年第1期5卷 51-56页

作者： Letian Zhang kai zheng Pengfei Zhang Min Jiang Jiabin Shen Chao Chen Chao Shen Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province College of Biology and Environmental EngineeringZhejiang Shuren UniversityHangzhou 310015China College of Petroleum Chemical Industry Changzhou UniversityChangzhou 213164China College of Material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of EducationHangzhou Normal UniversityHangzhou 311121China

A novel and sustainable visible-light-enabled multicomponent reaction involving quinoxalin-2(1H)-ones,indoles,and CF3SO2Na that does not require an external photocatalyst is described.This photoinduced reaction employs air as the sole oxidant,thereby providing a green and highly step-efficient approach to a series of biologically important trifluoromethylated 3-indolequinoxalin-2(1H)-ones.

关键词： Visible-light-catalysis Three-component reaction Trifluoromethylation Quinoxalin-2(1H)-Ones Indoles

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Atorvastatin, etanercept and the nephrogenic cardiac sympathetic remodeling in chronic renal failure rats

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Journal of Geriatric Cardiology 2024年第4期21卷 443-457页

作者： Jing-Yue XU zheng-kai XUE Ya-Ru ZHANG Xing LIU Xue ZHANG Xi YANG Tong LIU Kang-Yin CHEN Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease Department of CardiologyTianjin Institute of Cardiologythe Second Hospital of Tianjin Medical UniversityTianjinChina

BACKGROUND Chronic renal failure(CRF) patients are predisposed to arrhythmias, while the detailed mechanisms are unclear. We hypothesized the chronic inflammatory state of CRF patients may lead to cardiac sympathetic remodeling, increasing the incidence of ventricular arrhythmia(VA) and sudden cardiac death. And explored the role of atorvastatin and etanercept in this process.METHODS A total of 48 rats were randomly divided into sham operation group(Sham group), CRF group, CRF + atorvastatin group(CRF + statin group), and CRF + etanercept group(CRF + rhTNFR-Fcgroup). Sympathetic nerve remodeling was assessed by immunofluorescence of growth-associated protein 43(GAP-43) and tyrosine hydroxylase positive area fraction. Electrophysiological testing was performed to assess the incidence of VA by assessing the ventricular effective refractory period and ventricular fibrillation threshold. The levels of tumor necrosis factor-alpha(TNF-α) and interleukin-1beta were determined by Western blotting and enzyme-linked immunosorbent assay.RESULTS Echocardiogram showed that compared with the Sham group, left ventricular end-systolic diameter and ventricular weight/body weight ratio were significantly higher in the CRF group. Hematoxylin-eosin and Masson staining indicated that myocardial fibers were broken, disordered, and fibrotic in the CRF group. Western blotting, enzyme-linked immunosorbent assay,immunofluorescence and electrophysiological examination suggested that compared with the Sham group, GAP-43 and TNF-α proteins were significantly upregulated, GAP-43 and tyrosine hydroxylase positive nerve fiber area was increased, and ventricular fibrillation threshold was significantly decreased in the CRF group. The above effects were inhibited in the CRF + statin group and the CRF + rhTNFR-Fcgroup.CONCLUSIONS In CRF rats, TNF-α was upregulated, cardiac sympathetic remodeling was more severe, and the nephrogenic cardiac sympathetic remodeling existed. Atorvastatin and etanercept could downregulate the expression of TNF-α or inh

关键词： remodeling cardiac inhibited

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A topology approach to overcome the pore size/volume trade-offs for autonomous indoor humidity control

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Science China Chemistry 2024年

作者： Zhi-Shuo Wang Xue-Wen Zhang kai zheng Xiao-Xian Chen Dong-Dong Zhou Jie-Peng Zhang MOE Key Laboratory of Bioinorganic and Synthetic Chemistry GBRCE for Functional Molecular Engineering School of ChemistryIGCME Sun Yat-Sen University Chemistry and Chemical Engineering Guangdong Laboratory

Autonomous indoor humidity control is gaining more and more attention but is limited by the trade-offs among pore volume,pore size and water stability of water adsorbents. We solve this problem by using a unique coordination network topology combined with hydrolytically stable M（Ⅲ） carboxylate clusters. By extending the ligand length from 9.0 to 11.2 and 13.7?, the pore volume significantly increases from 0.99 to 1.40 and 1.78 cm3g–1, which proportionally increases the saturated water adsorption capacity. Meanwhile, the pore size slightly increases from 10.4 to 11.0 and 13.5?, which restricts the isotherm inflection pressure and hysteresis width to meet the requirement of indoor humidity control. Large single-crystals suitable for Xray diffraction studies were obtained by using Fe（Ⅲ） salts, while isostructural frameworks with sufficiently high water stabilities were synthesized by using Cr（Ⅲ） salts, which offer record working capacity of 0.90 and 1.10 g g–1for indoor humidity control.

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毛泽东塑造新中国形象的叙事话语分析

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湘潭大学学报（哲学社会科学版） 2024年第1期48卷 10-16页

作者：贺政凯清华大学马克思主义学院北京100084

新中国成立后,毛泽东出于争取国际社会对新中国的承认与支持、创造有利于社会主义建设的国际环境、维护世界和平与推动人类解放事业等多重考量,在不同意识形态交锋的现实语境下,身体力行地向国际社会宣介中国主张,全面展现新中国的真实... 详细信息

新中国成立后,毛泽东出于争取国际社会对新中国的承认与支持、创造有利于社会主义建设的国际环境、维护世界和平与推动人类解放事业等多重考量,在不同意识形态交锋的现实语境下,身体力行地向国际社会宣介中国主张,全面展现新中国的真实形象,形成了塑造新中国形象的叙事话语体系。毛泽东在塑造新中国形象的多重叙事中,阐释“革命与解放”的历史进程,明晰“中国与世界”的关系走向,描绘“建设与发展”的光明前景,形成了以尊重个性与增进共性为基础,以理论分析与事实佐证为原则,以历时演进与共时联系为逻辑,以主体表达与双向互动为方式的叙事方法。

关键词：毛泽东新中国国家形象叙事话语

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Numerical investigation on failure behavior of steel plate under explosive loading

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Science China(Technological Sciences) 2021年第6期64卷 1311-1324页

作者： zheng kai WANG ZhiHua State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology.Beijing 100081China Institute of Applied Mechanics College of Mechanical and Vehicle EngineeringTaiyuan University of TechnologyTaiyuan 030024China Shanxi Key Laboratory of Material Strength and Stndctural Impact Taiyuan University of TechnologyTaiyuan 030024China

The failure behavior of metal materials under strong dynamic loading such as explosive and impact loading has important applications in the fields of defense industry and civil security. In this study, a novel coupled bidirectional weighted mapping method between Lagrange particles and Euler meshes is proposed to numerically simulate the dynamic response and failure process of steel structure under explosive loading. In this method, the Lagrange particles and Euler meshes are used to describe the materials that need to be accurately tracked and can more accurately characterize the deformation history and failure process of the material. A comparison between the numerical results and experimental data shows that this method can be used to solve large deformation problem of multi-medium materials and the failure problems of complex structures under strong impact loading.

关键词： steel plate explosive loading coupled bidirectional mapping method failure behavior

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High-rate CH_(4)-to-C_(2)H_(6) photoconversion enabled by Au/ZnO porous nanosheets under oxygen-free system

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Science China Chemistry 2024年第3期67卷 869-875页

作者： kai zheng Xiaojing Zhang Jun Hu Chengbin Xu Juncheng Zhu Jing Li Mingyu Wu Shan Zhu Li Li Shumin Wang Yumei Lv Xin He Ming Zuo Chengyuan Liu Yang Pan Junfa Zhu Yongfu Sun Yi Xie Hefei National Laboratory for Physical Sciences at Microscale National Synchrotron Radiation LaboratoryUniversity of Science and Technology of ChinaHefei 230026China Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China State Grid Anhui Electric Power Research Institute Hefei 230601China

Photocatalytic CH_(4) coupling into high-valued C_(2)H_(6) is highly attractive,whereas the photosynthetic rate,especially under oxygen-free system,is still unsatisfying.Here,we designed the negatively charged metal supported on metal oxide nanosheets to activate the inert C-H bond in CH_(4)and hence accelerate CH_(4) coupling performance.As an example,the synthetic Au/ZnO porous nanosheets exhibit the C_(2)H_(6) photosynthetic rate of 1,121.6μmol g^(-1)_(cat)h^(-1)and the CH_(4) conversion rate of 2,374.6μmol g^(-1)_(cat)h^(-1) under oxygen-free system,2 orders of magnitude higher than those of previously reported photocatalysts.By virtue of several in situ spectroscopic techniques,it is established that the generated Au^(δ-)and O^-species together polarized the C-H bond,while the Au^(δ-)and O^-species jointly stabilized the CH_(3) intermediates,which favored the coupling of CH_(3) intermediate to photosynthesize C_(2)H_(6) instead of overoxidation into CO_(x).Thus,the design of dual active species is beneficial for achieving high-efficient CH_(4)-to-C_(2)H_(6) photoconversion.

关键词： dual surface-active sites selective methane coupling ethane room temperature

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Ontology and Metaphysics in Chinese Philosophy

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Frontiers of Philosophy in China 2017年第3期12卷 408-428页

作者： zheng kai Department of Philosophy Peking University Beijing 100871 China

This paper begins with a critique of the uses of the term ＂bentilun 本体论（ontology）＂ in modem Chinese scholarship by tracing their claim to being theoretical paradigms for understanding Chinese philosophy as a philosophical tradition. It is supplemented by a contrastive discussion of bentilun and its original ancient Greek counterpart, i.e. ontology, to show that the object of discourse in bentilun does not match up with that of ontology, namely ＂being qua being.＂ This comparative study also demonstrates that bentilun finds its philosophical significance in connection with the theory of xinxing 心性（heart-mind）. In the second section of this paper, a comparative study of ＂xingershangxue 形而上学（metaphysics）＂ and ＂metaphysics＂ highlights the central tenet that the dao essentially transcends language. Daoist philosophy is used as an example that identifies a unique predilection toward philosophical concepts that transcend the realm of nameable thoughts and objects in Chinese philosophy. Textual evidence is provided to show that the conceptual possibility of xingershangxue is based upon a fundamental difference between you 有（being） and wu 无（not-being）, in a way that is similar to philosophical developments in other early civilizations. Nonetheless, in addition to a philosophical interest in principles and values that transcend the material world, Daoist xingershangxue exhibits an idiosyncratic attention to notions and theories whose object of discourse is essentially unnameable. This characteristic philosophical interest is identified with the aim of locating essential disciplines within Chinese philosophy, including the theory of xinxing, practical wisdom, and the theory of jingjie 境界（state-of-attainment） in a wider framework of east and west philosophical traditions.

关键词： bentilun ontology xingershangxue metaphysics wu logos being,Daoism

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