检索结果-南通市图书馆

Orbitronics for energy-efficient magnetization switching

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2025年第1期 398-399页

作者： Yuxuan YAO Daoqian ZHU Qingtao xiA Jianing LIANG Yuhao JIANG Zhiyang PENG Jiaxu LI Chen xiAO Renyou xu Wenwen WANG xiantao SHANG Shiyang LU Dapeng ZHU Hong-xi LIU Kaihua CAO Weisheng ZHAO Fert Beijing Institute School of Integrated Circuit Science and Engineering Beihang University National Key Lab of Spintronics Institute of International Innovation Beihang University Qingdao Research Institute Beihang University Truth Memory Corporation

Spin-orbit torque （SOT）,as a promising writing method for magnetic random-access memory （MRAM）,has garnered widespread interest for over a decade [1].Heavy metals,such as β-W,have been broadly adopted as spin current sources,but suffer from phase change at a limited thickness,resulting in a dramatic reduction of the charge-tospin conversion efficiency θSH[2].The thickness limitation leads to stringent etching conditions and large distribution among devices,posing challenges for simultaneously satisfying SOT efficiency,etching-stop margins,and back-end-ofline （BEOL） compatibility.

关键词：

Solubility of Potassium Acetate in Water,2,2,2-Trifluoroethanol,Ethanol and Their Binary Mixtures at 288.15—333.15 K

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2020年第5期36卷 921-926页

作者： WU xi yang Shuaishuai xu Shiming ZHANG xinjie Key Laboratory of Ocean Energy Utilization and Energyf Conseration of Ministry of Education School of Energy and Power EngineeringDalian University of TechnologyDalian 116024P.R.China

The potassium acetate solutions are new potential working fluids for the closed-type reverse electrodialy-sis(RED)power generation system driven by thennal *** this paper,the solubilities of potassium acetate in water,2,2,2-trilluoroethaiiol,ethanol and their binary mixtures were measured by using the laser dynamic method over the temperature range of 288.15 to 333.15 K under atmospheric *** results indicate that the solubility of potassium acetate solution is influenced by both the solvent components and solution temperature ***,it is found that the measured solubility data of the potassium acetate-water-2,2,2-trifluoroethanol solutions as per the laser dynamic method are sliglitly larger than that of the data obtained as per the static ***,five correlation models,including the Van?t Hoff model,Modified Apelblat model,Yaws model,A/z model and Modified Apelblat-Jouyban-Acree model,were used to correlate the measured solubility data of those potassium acetate solutions,with the relative standard deviations within 0.23%to 1.58%.

关键词： Solubility Electrolyte Solvent Potassium acetate

疾病不确定感对初诊高血压患者降压疗效及服药依从性的影响

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

护理学报 2009年第24期16卷 54-56页

作者：单美娟黄惠根杨满青杨旭希广东省心血管研究所广东省人民医院广东省医学科学院广东广州510080

目的观察疾病不确定感对初诊高血压患者降压疗效及服药依从性的影响,研究其规律性。方法选择2008年1—12月新检出的133例高血压患者,采用Missals疾病不确定感量表和Morisy服药依从性调查问卷进行评估,观察患者治疗前后血压值、疗效和服... 详细信息

目的观察疾病不确定感对初诊高血压患者降压疗效及服药依从性的影响,研究其规律性。方法选择2008年1—12月新检出的133例高血压患者,采用Missals疾病不确定感量表和Morisy服药依从性调查问卷进行评估,观察患者治疗前后血压值、疗效和服药依从性等指标。结果疾病不确定感量表得分偏高组平均年龄高于得分偏低患者;治疗后血压平均值和疗效各指标较得分偏低组差(P<0.05);服药依从性各指标低于得分偏低患者(P<0.05)。结论初诊高血压患者的疾病不确定感明显影响患者的治疗效果及服药依从性。护理人员应注意对初诊高血压患者进行不确定感评估,为患者提供各种相关知识和信息支持,降低患者疾病不确定感,从而提高其治疗的依从性和效果。

关键词：原发性高血压病初诊疾病不确定感疗效服药依从性

Automatic Generation Control Based on Multiple-step Greedy Attribute and Multiple-level Allocation Strategy

在线全文

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2022年第1期8卷 281-292页

作者： Lei xi Le Zhang Yanchun xu Shouxiang Wang Chao yang College of Electrical Engineering and New Energy and the Yichang Key Laboratory of Defense and Control of Cyber-Physical SystemsChina Three Gorges UniversityYichang 443002China College of Electrical Engineering and New Energy China Three Gorges UniversityYichang 443002China Key Laboratory of Smart Grid of Ministry of Education Tianjin UniversityTianjin 300072China

The strong stochastic disturbance caused by largescale distributed energy access to power grids affects the security,stability and economic operations of the power grid.A novel multiple-step greedy policy based on the consensus Qlearning(MSGP-CQ)strategy is proposed in this paper,which is an automatic generation control(AGC)for distributed energy incorporating multiple-step greedy attribute and multiple-level allocation *** convergence speed and learning efficiency in the MSGP algorithm are accelerated through the predictive multiple-step iteration updating in the proposed strategy,and the CQ algorithm is adopted with collaborative consensus and selflearning characteristics to enhance the adaptability of the power allocation strategy under the strong stochastic disturbances and obtain the total power commands in the power grid and the dynamic optimal allocations of the unit *** simulations of the improved IEEE two-area load-frequency control(LFC)power system and the interconnected system model of intelligent distribution network(IDN)groups incorporating a large amount of distributed energy show that the proposed strategy can achieve the optimal coordinated control and power allocation in the power *** algorithm MSGP-CQ has stronger robustness and faster dynamic optimization speed and can reduce generation *** it can also solve the strong stochastic disturbance caused by large-scale distributed energy access to the grid compared with some existing intelligent algorithms.

关键词： Automatic generation control collaborative consensus multiple-step greedy attribute multiple-level allocation

Measurement and correlation of the solubility of sodium acetate in eight pure and binary solvents

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2022年第4期35卷 474-484页

作者： xi Wu Shuaishuai yang Shiming xu xinjie Zhang Yujie Ren Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education School of Energy and Power EngineeringDalian University of TechnologyDalian 116024China

The knowledge of solubility of a salt in either the pure solvent or blend solvent is of great importance for studying or operating the crystallization,extraction,and distillation *** solubility of sodium acetate(NaAc)in four pure solvents(water,ethanol,acetic acid and 2,2,2-trifluoroethanol)and four binary solvents(water–ethanol,water-acetic acid,acetic acid–ethanol,and acetic acid-ethyl acetate)were measured by using the laser dynamic method at temperatures from 288.15 K to 338.15 K at 0.1 *** results showed that the solubility of NaAc was influenced by either the solution temperature or solvent *** aqueous sodium acetate solution possessed the maximal solubility under the experimental *** solubility of NaAc in 2,2,2-trifluoroethanol was found to be decreased with the increase of the solution ***,the solubilities of NaAc in other seven solvents increased as the solution temperature was ***,five correlation models,including the van’t Hoff model,modified Apelblat model,Yaws model,λh model,and modified Apelblat-Jouyban-Acree model were used to correlate the solubility data of those sodium acetate solutions with acceptable deviation,***,van’t Hoff analysis method was selected to analyze the change law of thermodynamic properties of a salt during the dissolution process.

关键词： Solubility Sodium acetate Solution Water Solvent

Experimental investigation of performance properties and agglomeration behavior of fly ash from gasification of corncobs

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 2017年第3期24卷 496-505页

作者： YAO xi-wen xu Kai-li LI yang College of Resources and Civil Engineering Northeastern University Shenyang 110819 China

The gasification industries make use of biomass residue as feedstock to produce synthesis gas,but the gasification of this waste biomass generates tons of ash *** properties and agglomeration behavior of corncob ash(CCA) collected from the gasification of corncobs in a pilot-scale gasification station were investigated by using some experimental *** on the chemical composition results,the agglomeration tendency of CCA from combustion and gasification process was also *** analysis shows that the fly ash is mainly composed of inorganic matters formed by K,Mg,Ca,Na,Fe,Al,S,*** agglomeration characteristics indicate that the slagging degree increases with the increase of ashing temperature,and the slagging tendency of these CCA samples from gasification or combustion is different with various slagging *** CCA samples from combustion or gasification can cause slagging/fouling problems in thermal conversion *** applications of CCA are closely related to its performances,and CCA has the potential to be used in various fields,for example,as a material for ceramic products and activated carbon,as an adsorbent,as a crude fertilizer,and as a structural material.

关键词： biomass gasification corncob fly ash agglomeration behavior characterization

Troglitazone induced apoptosis of human pterygium fibroblasts through a mitochondrial-dependent pathway

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2011年第2期4卷 143-146页

作者： xiao-xi yang, Jin-Tang xu Department of Ophthalmology the First Affiliated Hospital of Jinan University Guangzhou 510632 Guangdong Province China Laboratory of Ophthalmology School of Medicine Jinan University Guangzhou 510632 Guangdong Province China

AIM: To study the effect of troglitazone on primary culture human pterygium fibroblast (HPF). METHODS: Cell viability loss and apoptosis were quantified by cell counting kit-8, AnnexinV-FITC/PI double staining, caspases activity test and western blotting. Flow cytonnetry was used to detect mitochondrial membrane potential. RESULTS: Peroxisome proliferator-activated receptor gamma (PPAR-gamma) was positively expressed in pterygium specimens (n = 5). Troglitazone showed dose-dependent inhibition of cell survival, induced phospholipids redistribution, activated caspase-3, -9, and altered mitochondrial potential. Western blot assay demonstrated the increase of Bax/Bcl-2 protein ratio. CONCLUSION: Troglitazone induced apoptosis of HPF through a mitochondrial-dependent pathway.

关键词： pterygium peroxisome proliferator-activated receptor γ troglitazone apoptosis

Remaining Useful Life Prediction for a Multi-stack Solid Oxide Fuel Cell System with Degradation Interactions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2022年第4期8卷 1207-1214页

作者： xiaojuan Wu Liangfei xu yang Huang Danan yang Junhao Wang Houjun Wang xi Li School of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 610054China State Key Lab of Automotive Safety and Energy School of Vehicle and MobilityTsinghua UniversityBeijing 100084China School of Artificial Intelligencei and Automation Key Laboratory of Image Processing and Intelligent Control of Education MinistryHuazhong University of Science and TechnologyWuhan 430074China

Due to the constraints of manufacturing and materials,high-power plants cannot rely on only one solid oxide fuel cell stack.A multi-stack system is a solution for a highpower system,which consists of multiple fuel cell stacks.A short lifetime is one of the main challenges for the fuel cell before largescale commercial applications,and prognostic is an important method to improve the reliability of fuel *** from the traditional prognostic approaches applied to single-stack fuel cell systems,the key problem in multi-stack prediction is how to solve the correlation of multi-stack degradation,which can directly affect the accuracy of *** response to this difficulty,a standard Brownian motion is added to the traditional Wiener process to model the degradation of each stack,and then the probability density function of the remaining useful life(RUL)of each stack is ***,a Copula function is adopted to reflect the dependence between life distributions,so as to obtain the remaining useful life for the whole multi-stack system.1 The simulation results show that compared with the traditional prediction model,the proposed approach has a higher prediction accuracy for multi-stack fuel cell systems.

关键词： Degradation interaction multi-stack remaining useful life(RUL) solid oxide fuel cell(SOFC)

Changes of tear film and tear secretion after phacoemulsification in diabetic patients

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 Zhejiang University-Science B(Biomedicine & Biotechnology) 2008年第4期9卷 324-328页

作者： xi LIU yang-shun GU Ye-sheng xu Ophthalmology Center the First Affiliated Hospital School of Medicine Zhejiang University Hangzhou 310003 China

Objective: To evaluate tear film stability and tear secretion in patients with diabetes after phacoemulsification. Methods: Twenty-five diabetic cataract patients and 20 age-matched non-diabetic cataract patients as control underwent pha- coemulsification. Tear film break-up time (TFBUT), Schirmer I test (SIT), corneal fluorescein staining, and dry eye symptoms were measured pre- and postoperatively. Results: Diabetics had a decreased preoperative TFBUT and SIT. TFBUT was reduced on Day 1 and recovered on Day 180 postoperatively in both groups. SIT was increased after phacoemulsification, but returned to preoperative levels by Day 180 in non-diabetics, whereas it was lower than preoperative level in diabetics. Positive corneal fluo- rescein staining was elevated in both groups, and returned to preoperative levels only in controls. Dry eye symptoms were similar to fluorescein staining in both groups. Conclusion: Tear secretion was reduced in diabetic cataract patients after phacoe- mulsification, which worsened dry eye symptoms and predisposed those patients to ocular damage.

关键词： Phacoemulsification Diabetes Cataract Tear