检索结果-南通市图书馆

生育支持与欠发达地区育龄女性的生育意愿——基于贵州省88个区县的生育意愿调查

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

河南社会科学 2025年第1期33卷 91-101页

作者：周文贵州省社会科学院博士后工作站贵州贵阳550002 贵州财经大学经济学院贵州贵阳550025

生育支持已经成为强化青年生育意愿和生育行为的重要举措,然而受限于研究数据,以往的研究很少对欠发达地区各类生育支持及其效果进行研究。为了研究欠发达地区各类生育支持对育龄女性生育意愿的作用,基于贵州省88个区县的生育意愿调查数... 详细信息

生育支持已经成为强化青年生育意愿和生育行为的重要举措,然而受限于研究数据,以往的研究很少对欠发达地区各类生育支持及其效果进行研究。为了研究欠发达地区各类生育支持对育龄女性生育意愿的作用,基于贵州省88个区县的生育意愿调查数据,从政府政策支持、社会托育支持和家庭代际支持三个维度研究了生育支持对欠发达地区育龄女性生育意愿的影响。研究发现:(1)当前贵州育龄女性的生育意愿已经下降到了较低水平,未来生育水平有进一步下降的风险。(2)家庭代际支持、社会托育支持和政府政策支持对育龄女性的总体生育意愿都具有显著的促进作用,但只有政府政策支持和家庭代际支持对三孩生育意愿具有显著的影响,社会托育支持对三孩生育意愿的影响不显著。(3)异质性分析则发现各类生育支持对35岁以上的育龄女性影响较大,是对35岁以下年轻群体影响的两倍左右。各类支持对不同学历育龄女性的影响也出现了分化,总体上呈现出低学历女性受到家庭支持与政府政策支持影响较大,而高学历女性受到托育服务影响较大的特征。(4)各类生育支持方式对育龄女性生育意愿的协同效应十分显著,当各类生育支持都较强时,对育龄女性生育意愿的影响较大。基于上述结论,一方面,生育支持体系与生育支持政策既要坚持普惠性,又要兼顾不同群体差异化需求;另一方面,需要进一步完善生育支持体系,充分发挥各类生育支持的协同效应,让育龄女性在生育决策时有更多生育支持方式的选择。

关键词：生育支持体系生育意愿欠发达地区被访者驱动抽样调查

Experiments on Channel Evolution Caused by Check-dam Failure

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2012年第2期9卷 175-184页

作者： wen-Hsiao tseng Hsiao-wen WANG Shih-Chieh CHOU Yu-Lin KAO Chjeng-Lun Shieh Department of Hydraulic and Ocean Engineering National Cheng Kung University

A 10 m long,0.2 m wide flume was employed to simulate the channel bed evolution of check-dam *** experiment longitudinal profiles,the gradient of channel bed,head-cutting propagation distance and deposition length were compared with the theoretical solution derived from a sediment transport diffusion *** contrast with the theoretical solution,two different gradients were obtained upstream and downstream of the *** theoretical solution provides a good description of the changes upstream of the check-dam. The ratio of clear water depth to sediment moving layer thickness in the experiment was analyzed and showed that high concentration sediment laden flow was taken in the incipient of check-dam failure,which may be the reason why the experiment result was slightly different from the theoretical solution in the downstream of check-dam.

关键词： Check-dam failure Diffusion equation Debris flow

在线全文

学校读者我要写书评

暂无评论

惩罚对齐法:测量不变性检验的新方法

心理科学进展 2025年第1期33卷 176-190,I0008-I0013页

作者：温聪聪厦门大学国际学院厦门361005

Asparouhov和Muthén在2023年提出了一种全新的惩罚结构方程模型框架。惩罚对齐法是该模型框架在测量不变性检验领域的应用范例。惩罚对齐法继承了多组探索性因子分析在探索性因子分析框架内进行测量不变性检验和可以估计交叉载荷等优点... 详细信息

Asparouhov和Muthén在2023年提出了一种全新的惩罚结构方程模型框架。惩罚对齐法是该模型框架在测量不变性检验领域的应用范例。惩罚对齐法继承了多组探索性因子分析在探索性因子分析框架内进行测量不变性检验和可以估计交叉载荷等优点,继承了对齐法使用成分损失函数、允许模型中存在一定量不等参数等优点,同时继承了贝叶斯结构方程模型对模型参数设置先验分布、通过检验模型参数的近似测量不变性达到潜因子均值比较的目的等优点。此外,惩罚对齐法还克服了传统测量不变性检验方法的一些不足。本文以大学生职业价值观研究为例,比较了多组验证性因子分析、基于验证性因子分析的惩罚对齐法分析、基于探索性结构方程模型的惩罚对齐法分析拟合样本数据的效果,演示了如何使用惩罚对齐法进行测量不变性检验和多组比较。

关键词：测量不变性检验惩罚对齐法贝叶斯结构方程模型探索性结构方程模型对齐先验分布

Simulation of Random Waves and Associated Laminar Bottom Shear Stresses

在线全文

学校读者我要写书评

暂无评论

China Ocean Engineering 2008年第3期22卷 477-490页

作者： Ching-jer HUANG Department of Hydraulic and Ocean Engineering National Cheng Kung University

This work presents a new approach for simulating the random waves in viscous fluids and the associated bottom shear stresses. By generating the incident random waves in a numerical wave flume and solving the unsteady two-dimensional Navier-Stokes equations and the fully nonlinear free surface boundaiy conditions for the fluid flows in the flume, the viscous flows and laminar bottom shear stresses induced by random waves axe determined. The deterministic spectral amplitude method implemented by use of the fast Fourier transform algorithm was adopted to generate the incident random waves. The accuracy of the numerical scheme is confirmed by comparing the predicted wave spectrum with the target spectrum and by comparing the nanlerical transfer function between the shear stress and the surface elevation with the theoretical transfer function. The maximum bottom shear stress caused by random waves, computed by this wave model, is compared with that obtained by Myrhaug＇ s model （1995）. The transfer function method is also employed to determine the maximum shear stress, and is proved accurate.

关键词： random waves laminar bottom shear stresses spectra Coda- JONSWAP spectral density transfer function Navier-Stokes equations boundary-layer flows

Numerical Simulation on a Tremendous Debris Flow Caused by Typhoon Morakot in the Jiaopu Stream,Taiwan

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2014年第1期11卷 1-18页

作者： HSU Yu-chao YEN Haw tseng wen-hsiao JAN Chyan-deng Department of Hydraulic and Ocean Engineering National Cheng Kung University Blackland Research and Extension Center Texas A&M AgriLife Research Sun-Rise Engineering Consultant Company

In August 2009,Typhoon Morakot brought a large amount of rainfall with both high intensity and long duration to a vast area of ***,this resulted in a catastrophic landslide in Hsiaolin Village,***,large amounts of landslides were formed in the Jiaopu Stream watershed near the southeast part of the Hsiaolin *** Hsiaolin Village access road(Provincial Highway No.21 and Bridge No.8) was completely destroyed by the landslide and consequent debris *** major scope of this study is to apply a debris flow model to simulate the disaster caused by the debris flow that occurred in the Jiaopu Stream during Typhoon *** to the interviews with local residents,this study applied the destruction time of Bridge No.8 and Chen's house to verify the numerical debris flow *** the spatial rainfall distributions information,the numerical simulations of the debris flow are conducted in two *** the first stage(before the landslide-dam failure),the elevation of the debris flow and the corresponding potential damages toward residential properties were *** the second stage(after the landslidedam failure),comparisons of simulation results between the longitudinal and cross profiles of the Jiaopu Stream were performed using topographic maps and satellite *** summary,applications of the adopted numerical debris flow model have shown positive impact on supporting better understanding of the occurrence and movement of debris flow processes.

关键词： Typhoon Morakot Debris flow Numerical simulation Jiaopu Stream Hsiaolin Village

Improving postoperative outcomes in patients with pancreatic cancer:Inflammatory and nutritional biomarkers

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Oncology 2025年第1期16卷 59-64页

作者： Chun-Han Cheng wen-Rui Hao Tzu-Hurng Cheng Department of Medical Education Linkou Chang Gung Memorial HospitalTaoyuan 33305Taiwan Division of Cardiology Department of Internal MedicineShuang Ho HospitalMinistry of Health and WelfareTaipei Medical UniversityNew Taipei 23561Taiwan Division of Cardiology Department of Internal MedicineSchool of MedicineCollege of MedicineTaipei Medical UniversityTaipei 11002Taiwan Department of Biochemistry School of MedicineCollege of MedicineChina Medical UniversityTaichung 404328Taiwan

This editorial assesses the prognostic value of preoperative inflammatory and nutritional biomarkers in patients undergoing surgical resection for pancreatic *** et al evaluated the ability of seven biomarkers to predict postoperative recovery and long-term *** biomarkers were albumin-to-globulin ratio,prognostic nutritional index(PNI),systemic immune-inflammation index,neutrophil-to-lymphocyte ratio,platelet-to-lymphocyte ratio,nutritional risk index,and geriatric nutritional risk *** PNI was found to be a strong predictor of both overall and recurrence-free survival,underscoring its clinical relevance in managing patients with pancreatic cancer.

关键词： Pancreatic cancer Prognostic nutritional index Systemic immune-inflammation index Postoperative recovery Prognosis

Scenario-based Optimal Real-time Charging Strategy of Electric Vehicles with Bayesian Long Short-term Memory Networks

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2024年第5期12卷 1572-1583页

作者： Hongtao Ren Chung-Li tseng Fushuan wen Chongyu Wang Guoyan Chen Xiao Li the College of Electrical Engineering Zhejiang UniversityHangzhou 310027China UNSW Business School The University of New South WalesNSW 2052SydneyAustralia Hainan Institute Zhejiang UniversitySanya 572000China the Department of Electrical Engineering College of Infor‐mation Science and EngineeringHuaqiao UniversityXiamenChina Guangzhou Power Supply Bureau of Guangdong Power Grid Co. Ltd.GuangzhouChina

Joint operation optimization for electric vehicles(EVs)and on-site or adjacent photovoltaic generation(PVG)are pivotal to maintaining the security and economics of the operation of the power system *** offline optimization algorithms lack real-time applicability due to uncertainties involved in the charging service of an EV charging station(EVCS).Firstly,an optimization model for real-time EV charging strategy is proposed to address these challenges,which accounts for environmental uncertainties of an EVCS,encompassing EV arrivals,charging demands,PVG outputs,and the electricity ***,a scenario-based two-stage optimization approach is *** scenarios of the underlying uncertain environmental factors are generated by the Bayesian long short-term memory(B-LSTM)***,numerical results substantiate the efficacy of the proposed optimization approach,and demonstrate superior profitability compared with prevalent approaches.

关键词： Bayesian neural network charging strategy electric vehicle(EV) long short-term memory(LSTM) scenario analysis

Broadband and perfect terahertz absorber based on multilayer metamaterial with cross-ring patterned structures

在线全文

学校读者我要写书评

暂无评论

Optoelectronics Letters 2025年第1期21卷 1-6页

作者： wen Jin LIU Zhanzhi WU Zhengwei PAN Yu ZHANG Ying School of Science Xi'an Shiyou University Shaanxi Key Laboratory of Measurement and Control Technology for Oil and Gas Wells

Broadband and perfect terahertz absorber based on multilayer metamaterial using cross-ring patterned structures is proposed and investigated. The structure of the absorber is double absorption layers consisting of a chromium cross ring and eight isosceles right triangles. The unique structure of the double absorbing layers excites the electric dipole multimode resonance, giving rise to high absorption performance. Meanwhile, the influence of construal parameters on absorber behavior is also discussed. The numerical results show that the absorption achieves over 90% ranging from 2.45 THz to 6.25 THz and 99% absorption in the range of 3.7—5.3 THz. The realization of broadband and perfect absorber is described using the impedance matching principle. It is obviously found that the absorber is insensitive to the high angle of incidence for both transverse electric(TE) and transverse magnetic(TM) polarizations. Compared with the former reports, this absorber has remarkable improved absorption efficiency and smaller period. The terahertz absorber may be found applications in the fields of energy capture and thermal detection.

关键词： Metamaterials

The potential mechanism and clinical application value of remote ischemic conditioning in stroke

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第6期20卷 1613-1627页

作者： Yajun Zhu Xiaoguo Li Xingwei Lei Liuyang Tang Daochen wen Bo Zeng Xiaofeng Zhang Zichao Huang Zongduo Guo The First Affiliated Hospital of Chongqing Medical University ChongqingChina

Some studies have confirmed the neuroprotective effect of remote ischemic conditioning against stroke. Although numerous animal researches have shown that the neuroprotective effect of remote ischemic conditioning may be related to neuroinflammation, cellular immunity, apoptosis, and autophagy, the exact underlying molecular mechanisms are unclear. This review summarizes the current status of different types of remote ischemic conditioning methods in animal and clinical studies and analyzes their commonalities and differences in neuroprotective mechanisms and signaling pathways. Remote ischemic conditioning has emerged as a potential therapeutic approach for improving stroke-induced brain injury owing to its simplicity, non-invasiveness, safety, and patient tolerability. Different forms of remote ischemic conditioning exhibit distinct intervention patterns, timing, and application range. Mechanistically, remote ischemic conditioning can exert neuroprotective effects by activating the Notch1/phosphatidylinositol 3-kinase/Akt signaling pathway, improving cerebral perfusion, suppressing neuroinflammation, inhibiting cell apoptosis, activating autophagy, and promoting neural regeneration. While remote ischemic conditioning has shown potential in improving stroke outcomes, its full clinical translation has not yet been achieved.

关键词： Akt apoptosis autophagy cerebral perfusion cerebral vascular stenosis clinical transformation hemorrhagic stroke ischemic stroke neuroinflammation neuroprotection Notch1 PI3K remote ischemic conditioning stroke