检索结果-南通市图书馆

Essence of Pseudogap and Oscillation in High-Temperature Cuprate Superconductor Junction of Pseudogap State

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2007年第2期47卷 343-348页

作者： liu fu-Sui HOU Yu-Min CHEN Wan-Fang Department of Physics Beijing University Beijing 100871 China CCAST （World Lab.） P.O. Box 8730 Beijing 100080 China Graduate Schools the Chinese Academy of Sciences Beijing 100049 China

This paper gives methods to calculate the pairing temperature T＊, at which a pseudogap is opened, and the superconducting temperature Tc, at which superconductivity appears, in the high-Te cuprates, and demonstrates directly that at Tc 〈 T 〈 T＊ the pseudogap is the gap of Cooper pair without long-range phase coherence, and at T 〈 Tc there is long-range phase coherence between Cooper pairs. Based on the above clear physical picture on the pseudogap state and our mechanism for the ac Josephson effect, this paper proposes that there should he a novel oscillatory current in P-I-P junction, induced by a constant bias on the junction. Here, P represents the high-Tc curates in the pseudogap state, where Cooper pairs do not have long-range phase coherence, and I represents the thin insulating barrier. This paper conjectures that there is a possible high-temperature superconductivity in the heavily underdoped high-Tc cuprates.

关键词： pseudogap high-Tc cuprate oscillation

Purifying chylous plasma by precluding triglyceride via carboxylated polyethersulfone microfiltration membrane

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2022年第9期35卷 130-139页

作者： Yang liu Qiu Han Guiliang Li Haibo Lin fu liu Gang Deng Dingfeng Lv Weijie Sun Ningbo Institute of Materials Technology&Engineering Chinese Academy of SciencesNingbo 315000China University of Chinese Academy of Sciences Beijing 100049China The Ningbo Central Blood Station Ningbo 315099China Department of Blood Transfusion Ningbo First HospitalNingbo 315010China

Precluding the excessive lipoproteins from plasma rapidly and effectively is highly needed for biomedical detection and reducing plasma product scrap in blood donation *** current centrifugation procedure is high-cost and ***,we fabricated an anionic microfiltration polyethersulfone(PES)membrane modified by interface swelling and implanting of acrylic acid(AA)for screening out large particle lipoprotein chylomicron(CM)and adsorbing cationic very low-density lipoproteins(VLDL).To improve the separation efficiency,a two-stage filtration through carboxylated polyethersulfone microfiltration membranes with the mean pore size of 0.45 and 0.22μm respectively were *** total reflection Fourier transform infrared technique(ATR-FTIR),water contact angle(WCA),Zeta potential and scanning electron microscope(SEM)were employed to characterize the modified *** test the effectiveness of this membrane,plasma flux and concentration variation of plasma components were examined to study the purification ***,the hemocompatibility of modified membranes was tested to confirm its practicability on bloodcontacting *** carboxylated polyethersulfone microfiltration membrane shows its promising potential application to purify chylous plasma.

关键词： Chylous plasma Chylomicrons Very low-density lipoproteins Carboxylated polyethersulfone microfiltration membrane

Environmental and biological influences on the stability of silver nanoparticles

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2011年第19期56卷 2009-2015页

作者： liu Wei ZHOU QunFang liu JiYan fu JianJie liu SiJin JIANG GuiBin State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-environmental Sciences Chinese Academy ofSciences Beijing 100085 China

Silver nanoparticles (Ag NPs) are easily dispersed and stable, and their application has become widespread. Consequently, concern has arisen regarding their potential effects on the environment and human health. However, the current understanding on the stability of Ag NPs is limited. Therefore, in this study the influence of environmental and biological factors, such as ionic strength, valence, biological molecules, pH and temperature, on the properties of Ag NPs was investigated. The absorption spectra, size, zeta potential, and release of silver ions were evaluated. Ionic strength, valence, Dulbecco’s Modified Eagle’s Medium (DMEM), without fetal bovine serum (FBS), reduced the stability of the Ag NPs. However, in DMEM with 10% FBS, the Ag NPs maintained their stability and nanoscale characteristics. These findings provide an essential insight into the environmental and biological factors that should be evaluated in a risk assessment of Ag NPs.

关键词：银纳米粒子生物因素稳定性环境 Zeta电位离子强度胎牛血清 DMEM

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2014年第3期31卷 14-17页

作者： ZHAO Hu LI Tie-fu liu Jian-She CHEN Wei Institute of Microelectronics Tsinghua National Laboratory of Information Science and Technology Tsinghua University Beijing 100084

A phase-slip flux qubit, exactly dual to a charge qubit, is composed of a superconducting loop interrupted by a phase-slip junction. We propose a tunable phase-slip flux qubit by replacing the phase-slip junction with a charge-related superconducting quantum interference device （SQUID） consisting of two phase-slip junctions connected in series with a superconducting island. This charge-SQUID acts as an effective phase-slip junction controlled by the applied gate voltage and can be used to tune the energy-level splitting of the qubit. In addition, we show that a large inductance inserted in the loop can reduce the inductance energy and consequently suppress the dominating flux noise of the phase-slip flux qubit. This enhanced phase-slip flux qubit is exactly dual to a transmon qubit.

关键词： QUBITS RESEARCH FLUX (Energy) QUANTUM interference devices SUPERCONDUCTORS PHYSICS research

空心加压螺钉联合内侧支撑钢板对Pauwells Ⅲ型股骨颈骨折患者的应用及对患者下肢功能的影响

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

黔南民族医专学报 2024年第2期37卷 135-139页

作者：董志军刘福尧潘圆付桂红北京积水潭医院贵州医院贵州贵阳550000

目的:探讨空心加压螺钉联合内侧支撑钢板对Pauwells Ⅲ型股骨颈骨折患者的应用及对患者下肢功能影响。方法:将本院2017年4月至2022年8月收治的Pauwells Ⅲ型股骨颈骨折患者82例随机分为观察组与对照组各41例。对照组采用常规的空心加压... 详细信息

目的:探讨空心加压螺钉联合内侧支撑钢板对Pauwells Ⅲ型股骨颈骨折患者的应用及对患者下肢功能影响。方法:将本院2017年4月至2022年8月收治的Pauwells Ⅲ型股骨颈骨折患者82例随机分为观察组与对照组各41例。对照组采用常规的空心加压螺钉固定治疗,观察组在此基础上联合内侧支撑钢板固定术治疗,对比两组患者围术期相关指标,髋关节功能(Hip function, Harris)评分,下肢功能以及术后近远期并发症发生率。结果:观察组患者骨折愈合时间明显短于对照组,手术时间、术中出血量、术后引流量、住院时间明显高于对照组(P0.05),术后3个月两组患者Harris评分中关节疼痛评分降低,观察组更低,功能、活动评分升高,观察组更高(P0.05),术后3个月和6个月步长、步频、步行速度明显提高,且观察组更高(P<0.05);观察组并发症发生率4.87%,明显低于对照组26.83%(P<0.05),且观察组慢性疼痛发生率4.87%,明显低于对照组19.51%(P<0.05)。结论:空心加压螺钉联合内侧支撑钢板对Pauwells Ⅲ型股骨颈骨折患者治疗效果显著,能够改善患者远期髋关节功能和下肢功能,减少术后并发症发生率,且同时能够减轻患者术后慢性疼痛情况的发生,值得临床应用推广。

关键词：空心加压螺钉内侧支撑钢股骨颈骨折下肢功能髋关节功能并发症

Liver metabolomic characteristics in three different rat models of Yin deficiency based on ultra-performance liquid chromatography coupled to quadrupole time-of-flight mass spectrometry

在线全文

学校读者我要写书评

暂无评论

Journal of Traditional Chinese Medicine 2023年第2期43卷 274-285页

作者： HU Xingyao liu Hongning YAN Xiaojun CHEN Zhong fu liu liu Ge CHEN Xuan SHANG Guangbin Jiangxi University of Chinese Medicine Research Center for Differention and Development of Traditional Chinese Medicine(TCM)Basic Theory Jiangxi Province Key Laboratory of TCM EtiopathogenisisNanchang 330004China

OBJECTIVE:To investigate the mechanism of Yin deficiency syndrome(YDS) by analyzing the liver metabolomic characteristics of three different Yin deficiency rat models METHODS:Following the TCM etiology,for clinical features and pathological manifestations of modern medicine,three kinds of animal models of Yin deficiency were induced and *** 48 Sprague-Dawley(SD) male rats were randomly divided into blank group,irritation induced model group,fuzi-Ganjiang induced model group,and thyroxine-reserpine induced model *** successful development of model,the ultraperformance liquid chromatography coupled to quadrupole time-of-flight mass spectrometry was carried out to detect metabolites in each *** metabolites of rat liver were analyzed for the characteristics of their *** pathway enrichment analysis and metabolic network construction were performed through various online databases including Metabolite Biology Role,Human Metabolome Database,MetaboAnalyst,and Kyoto Encyclopedia of Genes and ***:The SD rats in the experimental group showed symptoms like less weight gain,reduced diet and water intake,high body temperature,increased liver and kidney indexes,and abnormal liver and kidney tissue ***,the rats showed high increased levels of serum cyclic adenosine monophosphate,estradiol,alanine transaminase,and aspartate aminotransferase and decreased levels of cyclic guanosinc monophosphate and *** found four key interrelated metabolic pathways in the liver tissue metabolomics,including the biosynthesis of pantothenic acid and coenzyme A,and metabolism of alpha-linolenic acid metabolism,glycerophospholipid metabolism,and ***:The liver and kidney YDS is closely related to the biosynthesis of pantothenic acid and CoA and abnormal metabolism of α-linolenic acid,glycerophospholipid,and sphingolipid in SD rats.

关键词： molecular biology integrative medicine Yin deficiency syndrome syndrome complex

在线全文

学校读者我要写书评

暂无评论

竹叶花椒新品种‘川滇箐’

陕西林业科技 2024年第3期52卷 114-116页

作者：刘金波罗建勋刘芙蓉雷波县林业和草原保护中心四川雷波616550 四川省林业科学研究院成都610081

‘川滇箐’是在四川与云南交界的雷波县发现的实生花椒优良单株,树势强健,树冠开张,1~2 a生苗叶片正面具针状刺,刺基部淡红色,蓇葖果具密而突出的油腺。4 a生幼树开始结实,7月中旬采收,具有果大、果穗长、产量高、丰产稳产性好、麻味悠... 详细信息

‘川滇箐’是在四川与云南交界的雷波县发现的实生花椒优良单株,树势强健,树冠开张,1~2 a生苗叶片正面具针状刺,刺基部淡红色,蓇葖果具密而突出的油腺。4 a生幼树开始结实,7月中旬采收,具有果大、果穗长、产量高、丰产稳产性好、麻味悠长的特点。耐干旱瘠薄、适应性强,适宜在四川省西南地区海拔400~2200 m的干热河谷地区或盆地丘陵地区栽植。

关键词：竹叶花椒选育新品种 ‘川滇箐’

Lithium film with abundant stepped structures: A promising route for homogeneous Li ion deposition to conquer lithium dendrite issue and its action mechanism

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第9期31卷 166-175,I0006页

作者： Yong Zhang Shu-Qin Song Yong Gao Tian-fu liu Hong Zhao Department of Materials Science and Engineering Dalian Jiaotong UniversityDalian 116028LiaoningChina The Key Lab of Low-carbon Chemistry&Energy Conservation of Guangdong Province PCFM LabSchool of Materials Science and EngineeringSun Yat-sen UniversityGuangzhou510275GuangdongChina Institute of Science and Technology for New Energy Xi'an Technological UniversityXian 710021ShaanxiChina Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023LiaoningChina

Lithium is considered to be the ‘‘holy grail” for the application of energy storage due to its highest theoretical capacity and lowest anode potential. However, one of the grand difficulties in the development of lithium-based batteries is the lithium dendrite growth that leads to capacity fading and electrode degradation over long-term cycling. Compared with conventional electrolyte modifications, artificial solid electrolyte interfaces(SEI) synthesis and framework designing approaches, tuning surface morphology of lithium anode is the direct route to induce homogeneous Li ion deposition. Due to the high chemical activity of lithium metal, however, controllable growth of lithium micro/nanostructures by traditionally chemical approaches is still a big challenge. Herein, we have developed a facile compression route to fabricate lithium anode with abundant stepped lithium structures. The electrochemical results demonstrate that the dendritic growth issue is effectively suppressed by orderly arranged stepped lithium structures. After 90 cycles, a high discharge capacity of 954 mAh g^(-1) is achieved, which is 2.7times that of the uncompressed lithium anode(342 mAh g). First-principles calculations reveal that the orderly arranged stepped lithium structures are lithiophilic active sites to adsorb Li ion, which contributes to homogeneous deposition of Li ion on lithium anode, eventually solving the lithium dendrite issue. This work paves a new road to suppress dendritic growth, which will provide some new ideas to design long recycling sodium, potassium and zinc, and other metal anode batteries.

关键词： Lithium dendrite Steps/edges Active sites Compression

A Second-Order Sliding Mode Controller of Quad-Rotor UAV Based on PID Sliding Mode Surface with Unbalanced Load

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2021年第2期34卷 520-536页

作者： KANG Bing MIAO Yan liu fu DUAN Jilu WANG Ke JIANG Shoukun College of Communication Engineering Jilin UniversityChangchun 130022China

Quad-rotor unmanned aerial vehicle(UAV)is a typical multiple-input-multiple-output underactuated system with couplings and ***,the flying environment is very complex,so that it is impossible for the UAV to avoid effects derived from disturbances and *** order to improve the reliability of flight control,we established the dynamic model of quad-rotor UAV by Newton-Euler equation in unbalanced load *** external disturbances in the attitude,a second-order sliding mode controller was designed with PID sliding mode surface and Extended State Observer(ESO).The simulation experiments have got good control performance,illustrating the effectiveness of our ***,the controller was implemented in a quadrotor UAV,which carried a pan-tilt camera for aerial *** actual flight experiments proved that this paper dealt with the high stabilization flight control problem for the quad-rotor UAV,which laid a good foundation for autonomous flight of the UAV.

关键词： Quad-rotor UAV sliding mode controller unbalanced load