检索结果-南通市图书馆

A covalently integrated ZIF-8/polyamide acid mixed matrix membrane with superior gas separation performance

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2024年第12期76卷 30-41页

作者： guozhen li Shiqi ling Yuhui Cui Shilong Dong Tianyin liu Ting li Siyu Pang Peiyong Qin National Energy Research and Development Center for Biorefinery College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijing 100029China State Key Laboratory of Bio-Based Fiber Manufacturing Technology China Textile AcademyBeijing 100025China Paris Curie Engineer School Beijing University of Chemical TechnologyBeijing 100029China

Zeolitic imidazolate framework-8(ZIF-8)is a typical filler used to fabricate mixed matrix membranes(MMMs)on account of its attractive advantage of high selective permeability for gas ***,the performance is usually affected by filler aggregation due to strong interactions among fillers and weak interactions between the polymer and fillers,However,the performance is usually affected by filler aggregation due to strong interactions among fillers and weak interactions between the polymer and fillers,which will lead to a decrease of selectivity and the performance of gas separation will be strongly ***,we modified ZIF-8 with 3-amino-1,2,4-triazole to obtain ZIF-8-NH_(2),Kapton polyamide acid was selected as the polymer *** showed that the ZIF-8-NH_(2)/Kapton MMMs has a good compatibility interface between ZIF-8 and Kapton because of the covalent bridging,even the filler loading up to 45%(mass).The 45%(mass)of ZIF-8-NH_(2)/Kapton membrane showed 297 barrer(1 barrer=10^(-10)10 cm^(3)·cm·cm^(-2)·s^(-1)·cmHg^(-1),1 cmHg=1333.22 Pa,standard temperature and pressure)of the permeability of H_(2)and 43.9 and 62.2 of selectivities for H_(2)/N_(2)and for H_(2)/CH_(4),respectively,which are beyond the upper limit of Robeson 2008.

关键词： Polyamide acid ZIF-8 Mixed matrix membrane Gas separation

Influence of Alloy Elements on Magnetic Properties of Fe-based Amorphous Alloys

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 Materials Science & Technology 2000年第2期16卷 157-158页

作者： Guiqin ZHOU, Fazeng liAN and guozhen li (Institute of Materials and Metallurgy, Northeastern University, Shenyang 110006, China) Institute of Materials and Metallurgy Northeastern University Shenyang 110006 China

The influence of alloy elements on dc and ac magnetic properties of Fe79M2Si6B11C2(M is V, Mo or Cr) amorphous alloys was investigated. The variation law of the magnetic properties and the loss with the different elements was studied. The results show that the addition of V, Cr or Mo elements reduces the saturation magnetic induction in varying degrees. The addition of V element increases the permeability, decreases the coercivity and drops the loss. The addition of Cr and Mo reduces the permeability, and increases the coercivity.

关键词： Amorphous Alloys magnetic properties magnetic induction variation law

Effect of the Partial Substitution of V for Nb on the Magnetic Properties of Fe-based Nanocrystalline Alloy

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2000年第6期16卷 643-644页

作者： Guiqin ZHOU, Fazeng liAN and guozhen li (Institute of Materials and Metallurgy, Northeastern University, Shenyang 110006,China) [Manuscript received July 2, 1999] Inst. of Materials and Metallurgy Northeastern Univ. Shenyang 110006 China

The variation of the magnetic properties of the nanocrystalline alloys for the partial substitution of V for Nb with crystallizing treatment temperature and time was investigated. The variation law of the magnetic properties with the annealing temperature and time is essentially the same. The magnetic properties of the Fe-based nanocrystalline alloys for the partial substitution of V for Nb reduce, and the crystallizing treatment temperature of the alloys increases. The optimum properties of Fe74Cu1Nb3Si13B9 nanocrystalline alloys crystallized at 550℃x60 min are μ0=9.2xl0^4, μm=54.8xl0^4, Hc=1.14 A/m and Bs=1.26 T. The best properties for Fe74Cu1Nb3Si13B9 alloys annealed at 560℃x60 min are μ0=8.79x10^4, μm=50.18xl0^4, Hc=1.26 A/m and Bs=1.24 T.

关键词： Fe Effect of the Partial Substitution of V for Nb on the Magnetic Properties of Fe-based Nanocrystalline Alloy

A Rapid Adaptation Approach for Dynamic Air‑Writing Recognition Using Wearable Wristbands with Self‑Supervised Contrastive Learning

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 417-431页

作者： Yunjian Guo Kunpeng li Wei Yue Nam‑Young Kim Yang li guozhen Shen Jong‑Chul Lee Department of Electronic Convergence Engineering Kwangwoon UniversitySeoul 01897South Korea Radio Frequency Integrated Circuit(RFIC)Bio Centre Kwangwoon UniversitySeoul 01897South Korea Department of Electronic Engineering Kwangwoon UniversitySeoul 01897South Korea School of Microelectronics Shandong UniversityJinan 250101People’s Republic of China State Key Laboratory of Integrated Chips and Systems Fudan UniversityShanghai 200433People’s Republic of China School of Integrated Circuits and Electronics Beijing Institute of TechnologyBeijing 100081People’s Republic of China

Wearable wristband systems leverage deep learning to revolutionize hand gesture recognition in daily *** existing approaches that often focus on static gestures and require extensive labeled data,the proposed wearable wristband with selfsupervised contrastive learning excels at dynamic motion tracking and adapts rapidly across multiple *** features a four-channel sensing array composed of an ionic hydrogel with hierarchical microcone structures and ultrathin flexible electrodes,resulting in high-sensitivity capacitance *** wireless transmission from a Wi-Fi module,the proposed algorithm learns latent features from the unlabeled signals of random wrist ***,only few-shot labeled data are sufficient for fine-tuning the model,enabling rapid adaptation to various *** system achieves a high accuracy of 94.9%in different scenarios,including the prediction of eight-direction commands,and air-writing of all numbers and *** proposed method facilitates smooth transitions between multiple tasks without the need for modifying the structure or undergoing extensive task-specific *** utility has been further extended to enhance human–machine interaction over digital platforms,such as game controls,calculators,and three-language login systems,offering users a natural and intuitive way of communication.

关键词： Wearable wristband Self-supervised contrastive learning Dynamic gesture Air-writing Human-machine interaction

Maintain the Friendship and Communication

在线全文

学校读者我要写书评

暂无评论

International Understanding 2006年第1期 27-28页

作者： Song Zude and li guozhen ChangJiuqing

Invited by the Japan-China Association （JCA）, the CAFIU publication delegation visited Japan in December 11-18, 2005. While in Japan, the delegation respectively called upon Takeshi Noda, President of the JCA and member of the Lower House from the liberal Democratic Party of Japan, Wueno Mikio, Advisor to the Supreme Law Committee of the Japanese Publishing Association and President of the Copyright Council and had the professional discussions with the people from the Shogakukan, the famous publishing company in Japan,

关键词：中日协会出版业经验交流书店

在线全文

学校读者我要写书评

暂无评论

一种半群序列的一致预言定理

西安电子科技大学学报 1998年第1期25卷 95-97,115页

作者：李宝肖国镇西安电子科技大学信息保密所

给出了一点代数几何码的伴随式半群序列的概念，定义了这种序列的一种递推关系．建立了这种递推关系的一致预言定理．

关键词：递推关系一致预言半群序列编码译码密码

On Fixed Point Index and Fixed Point Theorems for Multivalued Semi-closed 1-set-contraction Mappings

在线全文

学校读者我要写书评

暂无评论

江西师范大学学报(自然科学版) 1991年第4期 294-297+305页

作者： li guozhen (Dept. of Math.)

Fitzpatrick P M and Petryshyn W V studied fixed point index and fixed point theorems of multivalued condensing *** aim of this paper is to give a concept of multivalued semi-closed 1-set-contraction mapping which is a more genere.i mapping and to define its fixed point index,and then we prove some fixed point theorems to extend some Petryshyn’ s results.

关键词： fixed point index fixed point theorems

Central sensibility of human cases with different body mass during oral glucose tolerance test using functional magnetic resonance imaging

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 2007年第9期2卷 523-527页

作者： Min Chen Yunting Zhang Tiemei Zhang Cheng Zhou Xiaomeng Wu Kui Cai Zhenghan Yang Wenchao Wang Weifeng Zhao Saying li Zhi Wang guozhen li Department of Radiology Beijing Hospital Ministry of Public Health Beijing 100730 China Department of Radiology General Hospital Tianjin Medical University Tianjin 300070 China Beijing Institute of Geriatrics Beijing Hospital Ministry of Public Health Beijing 100730 China

BACKGROUND： Because of the limitation of technique, there are few researches on regulating function o central hypothalamus by metabolism, especially the researches on real-time function. OBJECTIVE： To evaluate the response of hypothalamus to oral glucose tolerance test （OGTT） in differen body-weighted subjects by using functional magnetic resonance imaging （fMRI） so as to investigate th relationship between the sensitivity of hypothalamus in glycoregulation and disturbance of carbohydrate metabolism. DESIGN： Paired design. SETTING： Department of Radiology and Beijing Geriatrics Institute, Beijing Hospital, National Publi Health Bureau. PARTICIPANTS： A total of twenty healthy volunteers were selected from Beijing Geriatrics Institute National Public Health Bureau, including 10 subjects with obesity （5 males and 5 females; body mass 〉 28.0 kg/m2） and 10 subjects with normal body mass （5 males and 5 females; body mass from 18.5 to 23.9 kg/m2）. All subjects gave written informed consent before participating in the study. METHODS： fMRI study was performed on GE 1.5 T Signa Twinspeed Infinity with Excite. Each voluntee was ingested of glucose during the fMRI scan. T2＊ images were acquired using a single-shot gradient echo （EPI） technique. The parameters of EPI included： TR 3 000 ms, TE 40 ms, Flip angle 90°, field of view （FOV） 24 cm × 24 cm, thickness 5 mm, gap 0 mm, matrix 64 × 64, number of excitation 1. All 10 subjects with normal body mass underwent a repeat fMRI scan after consuming an equivalent amount o water without glucose on a separate day. The procedure for the fMRI scan with water intake was the same a for glucose ingestion. fMRI data were processed with Intensity Averaging Method. MAIN OUTCOME MEASURES： The central response of hypothalamus and feedback orientation during OGTT in different body-weighted subjects. RESULTS： An acute transient decrease of fMRI intensity in posterior inferior and anterior inferior o hypothalamus was observed in all subjec

关键词： hypothalamus magnetic resonance imaging glucose tolerance test

3 - 59 Effects of Electron Beam Irradiation to Aroma Components in liquor

在线全文

学校读者我要写书评

暂无评论

IMP & HIRFL Annual Report 2012年第1期 153-154页

作者： Lu Dong Zhang Miaomiao Cao guozhen li Wenjian