Results 11 to 20 of about 4,170,856 (159)

新形势下广西外贸企业转型升级面临的困境及路径选择

open access: yes, 2017
随着贸易保护主义的兴起,全球贸易增速持续放缓,外贸企业经营面临众多困境,转型升级日益艰难。通过大量翔实的数据分析了广西对外贸易发展现状,比较了不同所有制企业在其中发挥的作用,剖析了当前广西外贸企业转型升级面临的困境,提出通过调整出口产品结构,加强技术创新,加大融资扶持等途径实现外贸企业转型升级。国家社会科学基金项目(项目编号:13CGL016); 国家软科学研究计划项目(项目编号:2014GXS4D140); 中国-东盟研究中心(广西科学实验中心)开放课题(项目编号 ...
刘志雄, 许登峰
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The mediating role of self-perceived burden in the relationship between psychological resilience and quality of life in patients after anal fistula surgery (自我感受负担在肛瘘术后患者心理弹性与生活质量间的中介作用)

open access: yes中西医结合护理
Objective To explore the mediating effect of self-perceived burden on the relationship between psychological resilience and quality of life in patients after anal fistula surgery.
XU Zhaojun (徐召君)   +6 more
doaj   +1 more source

经导管主动脉瓣置换术治疗重度单纯自体主动脉瓣反流患者疗效观察

open access: yes浙江大学学报. 医学版
目的 评估经导管主动脉瓣置换术(TAVR)治疗不适合传统外科主动脉瓣置换术(SAVR)的重度单纯自体主动脉瓣反流(PNAR)患者的早期临床有效性和安全性。 方法
陈 鉴涛   +6 more
doaj   +1 more source

Intangible drivers of tolerance shape human–elephant coexistence in Southwest China

open access: yesPeople and Nature, EarlyView.
Abstract Southwest China is home to a small but rapidly expanding population of Asian elephants (Elephas maximus), whose growth has intensified conflicts with people living in shared landscapes. These conflicts result in substantial economic losses and occasional human casualties. This coexistence paradox—where conservation success leads to significant
Xiaoyu Yu   +4 more
wiley   +1 more source

中国科学技术史·科学思想卷 [PDF]

open access: yes, 2000
本文是作者为卢嘉锡主编的《中国科学技术史》中的《科学思想卷》写的导言,包括作者研究科学思想史的起因、科学思想史的内涵 ...
席泽宗
core  

2024版EAU/ESPU小儿泌尿外科指南有关先天性下尿路梗阻更新要点解读

open access: yes浙江大学学报. 医学版
先天性下尿路梗阻(CLUTO)是一类由尿道解剖结构异常导致梗阻的胎儿畸形,以围产期高并发症发生率和病死率为特征。2024年欧洲泌尿外科学会(EAU)和欧洲小儿泌尿外科学会(ESPU)联合发布一项小儿泌尿外科指南,针对CLUTO的全周期管理进行了系统性修订,在产前产后筛查和精准诊断、胎儿预后评估、产前干预指征和干预方式选择、产后治疗策略优化、终生随访框架和全周期管理路径构建等方面进行了重要更新。本文基于2024版EAU/ESPU指南内容,与2022年欧洲罕见肾病参考网(ERKNet)共识对照 ...
梅 伶俐   +4 more
doaj   +1 more source

The shared benefits of fallen fruits: A novel mechanism stabilizing a nursery pollination mutualism between Sambucus and kateretid beetles

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Understanding how cooperative interactions remain stable matters for biodiversity because many plants rely on specialist insects that can also impose reproductive costs. We studied the interaction between Sambucus sieboldiana and seed‐consuming Heterhelus beetles through detailed field observations and pollination experiments.
Suzu Kawashima   +3 more
wiley   +1 more source

中国科技史家的使命与实践——纪念中国科学院自然科学史研究所成立60周年学术研讨会

open access: yes, 2017
2016年12月24-26日,由中国科学院自然科学史研究所主办的"中国科技史家的使命与实践"学术研讨会在北京举行.来自全国41所高校和中国科学院、中国社会科学院、中国中医科学院、中国水利水电科学研究院等科研机构,以及博物馆界、出版社等单位200多位专家学者济济一堂,其中有114位教授级参会者.会上 ...
中国科学院自然科学史研究所
core   +1 more source

Latent profile analysis of quality of life and its influencing factors in Crohn’s disease patients with perianal lesions (克罗恩病伴肛周病变患者生存质量的潜在剖面分析与影响因素研究)

open access: yes中西医结合护理
Objective To explore the latent profiles of quality of life (QoL) in Crohn’s disease (CD) patients with perianal lesions and analyze influencing factors across different profiles.
ZHANG Shuixia (张水夏)   +4 more
doaj   +1 more source

A review of management of frailty in elderly patients with esophageal cancer (老年食管癌患者衰弱管理的研究进展)

open access: yes中西医结合护理, 2023
There has been a raising concern about frailty in elderly patients with esophageal cancer, and effective management of frailty may improve clinical outcomes of patients.
ZHANG Juanfang (张娟芳)   +3 more
doaj   +1 more source

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