Results 31 to 40 of about 347,418 (177)

安徽省数字经济水平测量及影响因素——基于熵值法、交互项模型

经济学
本文构建安徽省数字经济综合指标体系,利用熵权法测算出各指标的权重。基于安徽省2011-2019年16个地级市的面板数据,构建主效应模型和交互效应模型,研究基础设施、信息产业创新、数字交易发展对安徽省各地级市数字经济发展的影响因素。结果表明：安徽省数字经济发展水平呈良好的上升趋势,但16个地级市的经济发展维度协同性和差异性并存,准则层由高到低依次为信息产业创新、基础设施完善、数字交易发展,但差异性显著。基于此对安徽省数字经济未来发展提出建议。
颂恩 赵
semanticscholar   +1 more source

常见γ能谱探测器的核谱学性能测量与对比分析

Fushe yanjiu yu fushe gongyi xuebao
为了解不同γ能谱探测器的核谱学性能，选择了HPGe、CZT、LaBr3（Ce）、CeBr3和NaI（Tl）常见γ能谱探测器，分别测量了241Am、137Cs和60Co标准源，计算了不同探测器对不同核素的探测限。结果表明：在环境本底条件下，HPGe、CZT、LaBr3（Ce）、CeBr3和NaI（Tl） γ能谱探测器对发射低能γ射线241Am的探测限分别是0.039 Bq、0.180 Bq、0.781 Bq、0.697 Bq和1.104 Bq，但是在铅室内测量样品中137Cs的活度时，探测限分别是0 ...
孙 海, 顾 先宝, 於 国兵, 王 浩, 闻 德运, 张 文亮, 刘 犇   +6 more
doaj   +1 more source

Atroposelective Access to π‐Conjugated 1,2‐Azaborepines Enabled by Palladium‐Catalyzed Cyclization of N‐Heterobiaryls with Alkynylboronates

Advanced Science, EarlyView.
We report a palladium‐catalyzed atroposelective cyclization of N‐heterobiaryl triflates with alkynyl boronates to access seven‐membered 1,2‐BN‐bridged biaryls with high yields and excellent enantioselectivity via a cascade DyKAT, cis‐carbopalladation, and 1,2‐migration, which expands the toolbox for axially chiral π‐conjugated boron compounds and opens
Fengya He, Zhen Wang, Haoyu Guo, Shuguang Chen, Xu Zhang, Yongjia Shang, Hui Wang   +6 more
wiley   +1 more source

Progress for Bio-Refinery of Malic Acid(苹果酸生物炼制研究进展) [PDF]

Shipin kexue jishu xuebao, 2019
Being a top bio-derived value added chemical, malic acid is used widely in various industries including chemical engineering, food, and pharmaceutical. It is of great significance to produce malic acid by converting sustainable cellulosic raw materials ...
JIANG Shaotong(姜绍通), LI Xingjiang(李兴江)   +1 more
doaj   +1 more source

ABHD17C‐Mediated S‐Depalmitoylation of BCL6B Enhances CD24 Transcription to Resist Macrophage Phagocytosis in Pancreatic Cancer

Advanced Science, EarlyView.
ABHD17C‐mediated depalmitoylation of BCL6B at Cys442 blocks its nuclear import and triggers ubiquitin‐dependent degradation, attenuating transcriptional repression of the anti‐phagocytic signal CD24. This mechanism enables pancreatic cancer cells to evade macrophage phagocytosis and fosters an immunosuppressive microenvironment.
Yalu Zhang, Di Cui, Fanzheng Meng, Xu Zhu, Liang Zhu, Liang Wu, Haifeng Hu, Jizhou Wang, Hanhui Yao, Lianxin Liu   +9 more
wiley   +1 more source

Psychological self-care strategies for ICU nurses under situation of public health emergency (浅谈突发公共卫生事件应急状态下重症护士的自我心理调节)

中西医结合护理, 2021
This paper, taking COVID-19 epidemic as an example, briefly analyzed the mental status of ICU nurses under the situation of public health emergency.
QIAN Yongcui (钱永翠)
doaj   +1 more source

Strain‐Preserving Transfer of Freestanding Oxide Membranes for Tunable Magnetic Anisotropy

Advanced Science, EarlyView.
An epoxy‐assisted exfoliation and transfer strategy circumvents the trade‐off between structural flexibility and strain tunability in freestanding oxide membranes. Epitaxial strain is effectively preserved, enabling versatile and robust control of magnetic anisotropy without sacrificing flexibility.
Jinfeng Zhang, Yuyue Zhao, Shouzhe Dong, Jingdi Lu, Qing Wang, Fang Xu, Ao Wang, Kunjie Dai, Yueming Huang, Zhengguo Liang, Qiming Lv, Houbing Huang, Wenbin Wu, Lingfei Wang   +13 more
wiley   +1 more source

Application of stoma powder, skin protective film and hydrocolloid dressing and one-piece ostomy pouch in ICU patients with incontinence-associated dermatitis (护肤粉、皮肤保护膜、水胶体敷料联合一体式造口袋在ICU失禁性皮炎患者的应用)

中西医结合护理, 2021
Objective To investigate the effect of combination use of stoma powder, skin protective film and hydrocolloid dressing and one-piece ostomy pouch in ICU patients with incontinence-associated dermatitis (IAD).
ZHU Congmei (朱丛梅)
doaj   +1 more source

Photoelectric‐Coupled Ferroelectric Heterojunctions for Ultrahigh NO2 Sensing With Polarization‐Memory‐Assisted Interfacial Modulation

Advanced Science, EarlyView.
This study demonstrates a Bi2WO6/SrBi2Ta2O9 heterojunction where light‐driven ferroelectric polarization reversal couples with persistent photoconductivity, enabling exclusive NO2 selective room‐temperature sensing. The device achieves a two‐order‐of‐magnitude sensitivity enhancement over an unpolarized device, a sub‐ppb detection limit, and robust ...
Liping Tan, Xuefeng Hu, Ming Zhou, Weiwei Qing, Along Li, Zilong Wang, Mudan Feng, Shuang Zhao, Xiaoliang Wang, Peipei Li, Yali Bi, Wei Zhang   +11 more
wiley   +1 more source

Application of Mangled Extremity Severity Score in nursing management of patients with lower limb injury on the verge of amputation (肢体损伤严重程度评分在下肢毁损伤濒临截肢患者护理中的指导作用研究)

中西医结合护理, 2021
Objective To evaluate the Mangled Extremity Severity Score (MESS) system in nursing care of patients with lower limb injury on the verge of amputation.
GE Daoqun (葛道群), PENG Juxiang (彭菊香), BIAN Liyan (卞丽艳)   +2 more
doaj   +1 more source