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数字赋能乡村教育现代化的实然困境与优化路径

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教学与管理 2025年第1期 6-11页

作者：王倩吴家华胡恒钊安徽大学马克思主义学院合肥230601 江西农业大学马克思主义学院南昌330045

以数字赋能为发展契机,推进乡村教育现代化是中国式教育现代化的必然要求,也是乡村全面振兴的重要依托。在教育领域,数字技术蕴含着驱动乡村教育现代化发展的重要价值,能够有效扩大优质教育资源的覆盖范围、变革乡村教育形态、推动乡土... 详细信息

以数字赋能为发展契机,推进乡村教育现代化是中国式教育现代化的必然要求,也是乡村全面振兴的重要依托。在教育领域,数字技术蕴含着驱动乡村教育现代化发展的重要价值,能够有效扩大优质教育资源的覆盖范围、变革乡村教育形态、推动乡土文化的交流传播。但在推动数字赋能乡村教育现代化的实践中,面临着数字教育观念淡薄、数字基础条件不足、师生数字素养薄弱等现实阻碍,迫切需要从重塑价值观念、完善数字设施、培养师生数字素养、加强体制建设入手,为数字赋能乡村教育现代化发展注入新动力,以适应中国式教育现代化发展的新生态。

关键词：数字赋能乡村教育中国式教育现代化乡土文化

共同富裕视域下县城新型城镇化:叙事逻辑、主要挑战与推进理路

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新疆师范大学学报（哲学社会科学版） 2022年第6期43卷 84-97页

作者：左停赵泽宇中国农业大学人文与发展学院北京100083

城乡发展差距是中国实现共同富裕目标的阻碍之一。如何以县城为重要载体提高城乡融合水平、推动新型城镇化建设、实现共同富裕目标,已经成为政策与学术领域的重要课题。在此背景下,从共同富裕视域审视县城新型城镇化的叙事逻辑、主要挑... 详细信息

城乡发展差距是中国实现共同富裕目标的阻碍之一。如何以县城为重要载体提高城乡融合水平、推动新型城镇化建设、实现共同富裕目标,已经成为政策与学术领域的重要课题。在此背景下,从共同富裕视域审视县城新型城镇化的叙事逻辑、主要挑战与推进理路,能够带来深刻的政策启迪和理论创新。文本通过文献回顾与数据分析发现,县城在跳跃波动的城镇化历史中始终保持稳定态。从理论层面看,县城城镇化水平提升能够缩小城乡差异;从现实层面看,县城城镇化是中国促进城乡融合发展的重要政策导向。共同富裕视域下,中国县城新型城镇化进程仍然面临挑战,主要包括:城乡收入和基本公共服务差距导致经济发展不平衡,“乡村病”、“城市病”、“县城病”并存,农民工群体持续分摊不完全城镇化的社会经济成本,大城市户籍制度与农村产权经济制度对城镇化的质量升级产生阻滞,等等。未来,通过县城城镇化实现共同富裕目标,仍需围绕县城功能定位构建城乡融合机制,推动多种类型、异质样态的县城繁荣发展,盘活县域资产,增强县城产业支撑与就业吸纳能力,不断优化县城公共服务能力,提高其公共服务均等化水平和“带乡”效应,使县城真正成为促进城乡融合、缩小城乡差距、实现共同富裕的关键点。

关键词：共同富裕县城新型城镇化城乡融合发展

Mitigating volume expansion of silicon-based anode through interfacial engineering based on intermittent discharge strategy

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Journal of Energy Chemistry 2024年第11期98卷 680-691页

作者： Chunlei Li yu Zhu Yin Quan Feifei Zong Jie Wang Dongni zhao Ningshuang Zhang Peng Wang Xiaoling Cui Shiyou Li School of Petrochemical Technology Lanzhou University of TechnologyLanzhou 730050GansuChina Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province Lanzhou 730050GansuChina Gansu Engineering Laboratory of Cathode Material for Lithium-ion Battery Baiyin 730900GansuChina

Silicon is considered to be one of the most promising anode materials for lithium-ion batteries(LIBs),but its application is limited by the large volume expansion during alloying and *** constructing of a high-performance solid electrolyte interface(SEI) film on the surface of the anode material is considered to be one of the effective strategies to mitigate volume expansion of silicon-based *** this study,an intermittent discharge strategy which helps to improve the utilization efficiency of electrolyte additive of lithium difluorobisoxalate phosphate(LiDFBOP) is proposed to construct a highly conductive and dense SEI *** results of electrochemical and physical characterization and theoretical calculations show that the intermittent discharge in the voltage range from open circuit voltage(OCV) to 1.8 V facilitates the diffusion of the soluble products,creates the conditions for the repeated direct contact between Si@C anode and LiDFBOP additive,increases the decomposition of LiDFBOP additive,and thus produces a uniform,dense and inorganics-rich(Li_(2)C_(2)O_(4),LiF and Li_(x)PO_yF_z) SEI ***,this SEI film helps to ensure the even intercalation/de-intercalation of Li^(+) in the SEI film and the homogeneous diffusion of Li^(+) inside the Si particles,decreasing the internal stresses and anisotropic phase transitions,maintaining the integrity of Si particles,inhibiting the volume expansion and thu s improving the electrochemical performance of *** study not only improves the utilization efficiency of expensive additives through a simply and low-cost method,but also enriches the strategy to improve the electrochemical performance of Si@C anode through interfacial engineering.

关键词： Si@C anode Lithium difluoro(bisoxalato)phosphate Intermittent discharge Solid electrolyte interface Volume expansion

Strengthening and toughening styrene-butadiene rubber by mechanically interlocked cross-links

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Science China Chemistry 2024年第10期67卷 3414-3422页

作者： yuanhao Wang Li Yang Lin Cheng Jun zhao Ruixue Bai Wenbin Wang Shaolei Qu zhaoming Zhang Wei yu Xuzhou Yan School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Key Laboratory of Electrical Insulation and Thermal AgingShanghai Jiao Tong UniversityShanghai 200240China

Styrene-butadiene rubber(SBR)is an indispensable material in modern society,and the necessity for enhanced mechanical properties in SBR persists,particularly to withstand the rigors of challenging environmental *** surmount the limitations of conventional cross-linking modes,mechanical bonds stabilized by host-guest recognition are incorporated as the cross-linking points of SBR to form mechanically interlocked networks(MINs).Compared with covalently cross-linked network,the representative MIN exhibits superior mechanical performance in terms of elongation(1392%)and breaking strength(4.6 MPa),whose toughness has surged by 17 *** of host-guest recognition and subsequent sliding motion provide an effective energy dissipation mechanism,and the release of hidden length is also beneficial to enhance ***,the introduction of the rotaxane cross-links made the network more pliable and possess damping and elastic properties,which can return to initial state with one minute rest *** aspire that this direct introduction method can serve as a blueprint,offering valuable insights for the enhancement of mechanical properties in conventional commercial polymer materials.

关键词： mechanically interlocked molecules host-guest chemistry styrene-butadiene rubber mechanical properties dynamic materials

Application of ^(18)F-fluorodeoxyglucose positron emission tomography/computed tomography imaging in recurrent anastomotic tumors after surgery in digestive tract tumors

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World Journal of Gastrointestinal Surgery 2024年第8期16卷 2474-2483页

作者： Deng-Feng Ge Hao Ren Zi-Chen Yang Shou-Xiang zhao Zhen-ting Cheng Da-Da Wu Bin Zhang Department of Cardiothoracic Surgery Nanjing University of Chinese MedicineNanjing 210023Jiangsu ProvinceChina Department of Gastrointestinal Surgery Shanghai Sixth People’s HospitalShanghai 250063China

BACKGROUND This study was to investigate the application value of whole-body dynamic ^(18)F-fluorodeoxyglucose(FDG)positron emission tomography/computed tomogra-phy(PET/CT)imaging in recurrent anastomotic tumors of digestive tract after gastric and esophageal cancer *** patients with gastric and esophageal cancer have a high risk of tumor recurrence,and traditional imaging methods have certain limitations in early detection of recurrent ***-body dynamic ^(18)F-FDG PET/CT imaging,due to its high sensitivity and specifi-city,can provide comprehensive information on tumor metabolic activity,which is expected to improve the early diagnosis rate of postoperative recurrent tumors,and provide an important reference for clinical treatment *** A retrospective analysis was performed on 53 patients with upper digestive tract tumors after operation and systemic dynamic ^(18)F-FDG PET/CT imaging indi-cating abnormal FDG uptake by anastomosis,including 29 cases of gastric cancer and 24 cases of esophageal *** to the follow-up results of gas-troscopy and other imaging examinations before and after PET/CT examination,the patients were divided into an anastomotic recurrence group and anastomotic inflammation *** multi-parameter analysis software was used to obtain the metabolic rate(MRFDG),volume of distribution maximum(DVmax)of anastomotic lesions,and MRmean and DVmean of normal liver *** lesion/background ratio(LBR)was calculated by dividing the MRFDG and DVmax of the anastomotic lesion by the MRmean and DVmean of the normal liver tissue,respectively,to obtain LBR-MRFDG and *** independent sample t test was used for statistical analysis,and a receiver operating characteristic curve was used to analyze the differential diagnostic efficacy of each parameter for anastomotic recurrence and *** The dynamic ^(18)F-FDG PET/CT imaging parameters MRFDG,DVmax,LBR-MRFDG,and LBR-DVmax of post

关键词： Gastric cancer Esophageal cancer Anastomosis Dynamic positron emission tomography Differential diagnosis Metabolic rate

Expression and significance of MMP-9 and MDM2 in the oncogenesis of lung cancer in rats

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Asian Pacific Journal of Tropical Medicine 2014年第7期7卷 585-588页

作者： De-Hui Zhang Liang-yu Zhang Dong-Jie Liu Fang Yang Jin-Zao zhao Department of Oncology Daqing Oilfield General Hospital

Objective:To observe the expression of matrix metalloproteinase-9(MMP-9)and mouse double minute 2 homolog(MDM2)in the oncogenesis of lung cancer in rats and to explore their clinical ***:A total of 140 rats were selected,of which 20 were selected randomly as the control group;and the remaining 120 as the observation *** observation group was injected with benzopyrene to establish diseases model such as tissue proliferation,abnormal proliferation and lung *** the MMP-9 levels of lung tissue by enzyme-linked assay,detected the MDM2 levels of lung tissue by immunochemistry ***:The MMP-9 and MDM2 expression of the lung cancer group and the abnormal proliferation group were significantly higher than that in the tissue proliferation group and the control group,the difference was significant(P0.05).The MDM2 and MMP-9 expression were increased in turn in the small cell carcinoma,squamous cell carcinoma and adenocarcinoma,the difference was statistically significant(P0.05),and there is no significant difference of the MMP-9and MDM2 expressions between stageⅠand stageⅡ(P>0.05).Conclusions:The expression of MMP-9 and MDM2 in lung tissue was associated with lung disease and lung cancer,both of them may be involved in the development and metastasis of lung *** detection can be used as therapy and prognostic indicators for lung cancer.

关键词： Lung cancer Adenocarcinoma MDM2 MMP-9

Neural stem cell transplantation in the hippocampus of rats with cerebral ischemia/reperfusion injury Activation of the phosphatidylinositol-3 kinase/Akt pathway and increased brain-derived neurotrophic factor expression

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Neural Regeneration Research 2010年第21期5卷 1605-1610页

作者： yu zhao Shengtao Yao Shijun Wang Department of Neurology Fourth Affiliated Hospital Harbin Medical University Harbin 150001 Heilongjiang Province China Department of Neurosurgery Third Affiliated Hospital Zunyi Medical College Zunyi 563003 Guizhou Province China Department of Otorhinolaryngology First Affiliated Hospital Jiamusi University Jiamusi 154002 Heilongjiang Province China

The phosphatidylinositol-3 kinase （PI3K）/Akt pathway and brain-derived neurotrophic factor （BDNF） are involved in neurological functional recovery following cerebral ischemia. Therefore, we hypothesized that mechanisms of neuroprotection by transplantation of neural stem cells （NSCs） on cerebral ischemia contributed to activation of the PI3K/Akt pathway and enhanced BDNF expression. In the present study, Wortmannin （a specific, covalent inhibitor of PI3K） was administered adjacent to ischemic hippocampus by stereotactic transplantation to further confirm the neuroprotective mechanisms of NSC transplantation following cerebral ischemia. Results showed that focal infarct volume was significantly smaller in the NSCs group, but the neurological behavior score in the NSC group was significantly greater than the middle cerebral artery occlusion model group, Wortmannin treatment group, and NSCs ＋ Wortmannin treatment group. Protein expression of BDNF was significantly greater in the NSC group compared with the Wortmannin treatment group and NSCs ＋ Wortmannin treatment group. These results suggest that the neuroprotective role of NSC transplantation in the cerebral ischemia activated the PI3K/Akt pathway and upregulated BDNF expression in lesioned brains.

关键词： neural stem cells phosphatidylinositol-3 kinase brain-derived neurotrophic factor cerebral ischemia

AGTR1 A1166C gene polymorphism is associated with the effectiveness of valsartan monotherapy in Chinese patients with essential hypertension:A retrospective analysis

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Asian Pacific Journal of Tropical Medicine 2024年第9期17卷 418-424页

作者： Hanzhong yu Lei Li Shuyao Wei Qianqian Kong Wei Nu Bo Dong yuewu zhao Li Wang Department of Clinical Laboratory the Affiliated Xuzhou Municipal Hospital of Xuzhou Medical UniversityXuzhouJiangsu 221116China Department of Clinical Laboratory Xuzhou Tumor HospitalXuzhouJiangsu 221005China Department of Cardiovascular Medicine the Affiliated Xuzhou Municipal Hospital of Xuzhou Medical UniversityXuzhouJiangsu 221116China

Objective:To investigate whether angiotensinⅡtype 1 receptor(AGTR1 A1166C)gene polymorphism was associated with the effectiveness of valsartan monotherapy in Chinese patients with essential ***:This retrospective analysis included 198 patients(≥18 years of age)who received valsartan monotherapy(80 mg/day)for newly developed essential hypertension at the authors’center between January 1,2020 and December 31,*** for AGTR1 A1166C gene polymorphism was done by polymerase chain reaction(PCR)-melting curve analysis of genomic DNA from peripheral blood samples.A dominant genetic model for AGTR1 A1166C(AA genotype versus AC+CC genotype)was *** regression analysis of baseline variables and AGTR1 polymorphism was conducted to identify predictors of target blood pressure attainment(<140/90 mmHg)at the 4-week ***:The median age of the 198 patients was(53.7±13.5)years,and 58%were *** assays showed that 164 patients had the AA genotype,and 34 patients were of the AC/CC genotype,including 30 with the AC genotype and 4 with the CC *** distribution was consistent with Hardy Weinberg equilibrium.109 Patients(55.1%)attained the blood pressure *** analysis showed that smoking(versus no smoking,HR 0.314,95%CI 0.159-0.619,P=0.001)and AGTR1 A1166C AA genotype(versus AC/CC,HR 2.927,95%CI 1.296-6.611,P=0.023)were significant and independent predictors of target attainment.25 Patients(73.5%)with AGTR1 A1166C AC/CC genotype attained the target versus 51.2%(51/164)of patients with AGTR1 A1166C AA genotype(P=0.017).Patients with AGTR1 A1166C AC/CC genotype had a significantly greater reduction in systolic blood pressure[(33.1±10.8)mmHg versus(29.2±11.7)mmHg in AA carriers;(P=0.029)].Conclusions:Hypertensive patients carrying one or two C alleles of the AGTR1 A1166C gene were more responsive to valsartan treatment.

关键词： Essential hypertension AngiotensinⅡtype 1 receptor antagonist Valsartan AGTR1 A1166C Gene polymorphism

In situ polymerization of poly(3,4-ethylenedioxythiophene)protective layer towards stable zinc anode

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Nano Research 2025年第1期18卷 382-394页

作者： Debin Luo Peng Zhou Xiaowei Lv Panpan Sun Xiaohua Sun Hewei zhao College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion MaterialsChina Three Gorges UniversityYichang 443002China Hubei Three Gorges Laboratory Yichang 443007China School of Chemistry Beihang UniversityBeijing 100191China

Aqueous zinc-ion devices are considered promising candidates for energy storage due to their high safety,low cost and relatively high energy ***,the dendrite growth,hydrogen evolution reaction(HER)and corrosion of the zinc anode significantly limit the development of Zn-ion ***,an inexpensive poly(3,4-ethylenedioxythiophene)(PEDOT)protective layer was constructed in situ on the Zn surface using electropolymerization to suppress dendrite growth and side reactions,thereby enhancing the reversibility of *** and theoretical calculations revealed that this hydrophilic protective layer promotes the desolvation process of hydrated Zn^(2+)and facilitates the transport of zinc ions,thus improving the thermodynamic and kinetic properties of Zn^(2+)deposition and inhibiting interfacial side ***,the optimized PEDOT@Zn symmetric battery exhibited a cycling stability exceeding 1250 h at 0.5 mA·cm^(-2)and 0.25 mAh·cm^(-2),with a significantly reduced overpotential(from 91.8 to 35 mV).With the assistance of the PEDOT protective layer,the PEDOT@Zn//Cu battery maintained approximately 99.5%Coulombic efficiency after 450 ***-situ scanning electron microscopy(SEM)and in situ optical microscopy characterizations further confirmed that the PEDOT protective layer can effectively suppress the growth of zinc ***,the Zn-ion capacitors assembled by the PEDOT@Zn and activated carbon also demonstrated outstanding cycling stability.

关键词： zinc-ion devices zinc anode poly(3 4-ethylenedioxythiophene)(PEDOT) dendrite desolvation process