Results 31 to 40 of about 10,666 (162)

新型环保绝缘气体研发回顾与展望

open access: yesGaoya dianqi, 2022
文中针对目前电力行业SF6替代的迫切问题,重点回顾了环保型SF6替代气体的重要探索历程,以及气体分子设计方法的发展趋势,指出传统方法难以创造出新颖的分子结构以兼顾环保绝缘气体的各项性能要求。针对目前的问题与挑战,文中创新性地提出将材料基因工程这一兼具颠覆性和可行性的前沿技术引入到新型气体的探索研究中,研发出性能更优的单一分子和共沸协同复配体系,形成面向电网应用的新型气体“g4”。
张博雅   +14 more
doaj  

A Clinical Observation of Concomitant Therapy of Erlotinib and Whole Brain Radiotherapy in Patients of NSCLC Combined with Brain Metastases [PDF]

open access: yes, 2009
Background and objective Treatments to brain metastases in patients of NSCLC include operation, chemotherapy and radiotherapy, while the disease control rate of brain lesions is not so good, the media survival time is 4-6 months.
Jing ZHAO, Lihong ZHANG, Qiang FU
core  

Learner‐Focused Strategy Instruction From the Teachers’ and the Learners’ Perspective

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT Numerous large‐scale quantitative studies have been conducted to yield a macro‐level picture of the effectiveness of strategy instruction. However, little is understood about learners' actual processing of strategy instruction and interaction with the teachers delivering it.
Isobel Kai‐Hui Wang, Andrew D. Cohen
wiley   +1 more source

非线性光通信研究进展

open access: yesGuangtongxin yanjiu, 2001
回顾了非线性光通信研究发展的历史 ,介绍了国内外研究的现状 ,评述了色散管理孤子通信的优势和特性 ...
于丽, 杨伯君
doaj  

The AMP-mimetic AICAR prevents HFD-promoted hepatosteatosis and inhibits liver tumorigenesis [PDF]

open access: yes, 2015
肝细胞癌(Hepatocellularcarcinoma)是最常见的肝脏原位肿瘤。肝癌的 危险因素包括酒精性肝疾病、非酒精性肝炎、肝炎病毒感染等。这些因素都和肝 癌形成中炎症有重要关系。肥胖人群中,肝脏脂质积累造成的非酒精性脂肪肝炎, 肥胖已成为肝癌形成的潜在危险因素。流行病学研究表明,超重和肥胖增加了癌 症发生的风险。在升高体重指数超标的肝癌患者中,由于肝癌死亡的风险是正常 人的4.5倍。文献报道,肥胖通过增加白介素6和肿瘤坏死因子的表达促进肝脏 炎性过程 ...
高建龙
core  

Research progress on osteoporotic vertebral collapse with delayed neurological deficits [PDF]

open access: yes, 2017
随着世界人口老龄化,骨质疏松已成为一项全球化的健康问题。骨折是骨质疏松最严重的后果,而骨质疏松性椎体骨折是最常见的骨折类型。骨质疏松性椎体骨折大; 多数可通过保守治疗获得骨折愈合,但仍有约10%~ 30%并发骨折不愈合,并渐进性出现骨质疏松性椎体骨折塌陷(osteoporotic; vertebral collapse,OVC); 其中约3% 的OVC伴有迟发性神经损害(delayed neurological; deficits,DND)。有关OVC并发DND的具体机制以及其治疗策略,文献报道不尽相同。
刘伯龄   +3 more
core   +1 more source

Using Cultural Theory to Specify the Policy Actors, Belief Systems, and Sources of Coalition, Conflict, Stability, and Change in Policy Advocacy Coalitions and Environmental Resource Policies

open access: yesPolicy Studies Journal, EarlyView.
ABSTRACT We use grid‐group cultural theory (CT) to specify underspecified aspects of the Advocacy Coalition Framework (ACF). Our theoretical synthesis of CT and the ACF provides, first, an exhaustive typology of policy actors and their cultural cognitive biases that entail, guide, and constrain policy core beliefs about problem definitions and ...
Metodi Sotirov, Brendon Swedlow
wiley   +1 more source

181例皮肤血管异常临床分析

open access: yesZhongguo shiyan zhenduanxue, 2015
为了研究血管瘤及血管畸形的临床特点、流行病学情况及治疗转归,本文回顾性分析了181例皮肤血管异常的患者的临床资料,报道如下。1资料与方法1.1临床病例2012年1月至2013年3月间就诊于吉林大学中日联谊医院皮肤科门诊的皮肤血管异常的患者,选择其中资料完整的患者181例进行回顾性分析。1.2诊断及分型依据临床特点、皮肤彩超及1996年国际血管异常研究协会(ISSVA)分类方法诊断、分型[1]。
王岚, 王震, 姜日花, 贾玉玺
doaj  

The efficacy and side effects of liposomal doxorubicin-based therapy and epirubicin-based therapy for breast cancer patients: a meta-analysis [PDF]

open access: yes
Objective To conduct a meta-analysis to explore the specific efficacy and side effects of liposomal doxorubicin (LD) and epirubicin (E)-based therapies in breast cancer patients.
DENG Lang   +5 more
core   +1 more source

系统性红斑狼疮合并妊娠的回顾性分析 [PDF]

open access: yes, 2020
【目的】探讨系统性红斑狼疮(SLE)合并妊娠孕妇孕期病情变化以及对妊娠结局的影响,分析不良妊娠结局的相关危险因素。【方法】回顾性分析2013年1月1日至2018年12月31日在中山大学附属第三医院产检并分娩,且病例资料完整的合并SLE孕妇,共89例孕妇,95次妊娠,分析孕期SLE病情活动情况及妊娠结局,找出不良妊娠结局的相关危险因素。【结果】①根据SLE疾病活动指数(SLEDAI)评价病情变化,将其分为疾病活动组及稳定组,其中孕期出现病情活动39例(活动组,A组),病情稳定56例(稳定组,B组 ...
孟召然   +4 more
core  

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