|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Influence of Elevated Curing Temperature on the Properties of Cement Paste and Concrete at the Same Hydration Degree显示文摘Three different curing temperatures(20 ℃, 40 ℃, and 60 ℃) were set, so that the nonevaporable water(w_n) contents of plain cement pastes cured at these three temperatures were measured to determine the hydration degree of cement. Tests were carried out to compare the pore structure and strength of cement paste, as well as the strength and permeability of concrete under different temperature curing conditions when their cements were cured to the same hydration degree. The experimental results show that either at a relatively low hydration degree(w_n=15%) or high hydration degree(w_n=16.5%), elevated curing temperature has little influence on the hydration products of cement paste, while it has a negative influence on the pore structure and compressive strength of cement paste. However, this negative effect is weaker at high hydration degree. The large capillary pore(>100 nm) volumes of cement pastes remain almost the same at high hydration degree, regardless of curing temperatures. As for the concrete, elevated curing temperature also has negative influence on its compressive strength development, at both low hydration degree and high hydration degree. And this negative effect is stronger than that on cement paste's compressive strength at the same hydration degree. On the whole, elevated curing temperature has little influence on the resistance of concrete to chloride ion penetration. | 王强 SHI Mengxiao WANG Dengquan | 2017 | Journal of Wuhan University of Technology(Materials Science)2017，32，6： | 4 |
| 2 | A comparison of lightwand and laryngoscopic intubation techniques in patients undergoing laparoscopic cholecystectomy显示文摘Objective:To assess the effects of lightwand and laryngoscopic intubation techniques in patients undergoing laparoscopic cholecystectomy (LC). Methods:300 ASA physical status I and II patients,undergoing LC,were randomly assigned to two groups,with 150 cases in each group. Patients in the LS group underwent endotracheal intubation using a standard direct-suspension laryngoscopic technique. Patients in the LW group were intubated by using transillumination with a lightwand. Mean arterial pressure and heart rate were recorded before induction,and at 1,3 and 5 min after intubation. The incidence and of sore throat,hoarseness,and dysphagia was assessed twenty-four hours after surgery. Results:This study demonstrated no clinically significant difference in cardiovascular variables between the two techniques. Patients had a significantly lower incidence of sore throat,hoarseness,and dysphagia when the lightwand was used for intubation. Conclusion:This study suggests that lightwand intubation may decrease the incidence of postoperative sore throat,hoarseness,and dysphagia,thereby potentially increasing satisfaction in surgical patients. Therefore,more frequent use of the lightwand is recom-mended for endotracheal intubation. | Chenglan Xie Congjin Ju Jiawen Cheng Xuejun Yan Dengquan Guo | 2009 | Journal of Nanjing Medical University2009，23，3： | 2 |
| 3 | Research of textures of ultrafine grains pure copper produced by accu- mulative roll-bonding显示文摘 | Chen Liangwei Shi Qingnan Chen Dengquan | 2009 | Mater Sci Eng A2009，508，12： | 1 |
| 4 | Fruit stem blight on kiwifruit (Actinidia chinensis) in China显示文摘 | Cheng Li Junxi Jiang Luping Liu Chaoyu Cui Ting Huang Dengquan Liu | 2013 | Canadian Journal of Plant Pathology2013，，3： | 1 |
| 5 | StructuralandopticalpropertiesofSbGdopedZnOpowderssynthesizedbyhyGdrothermalmethod显示文摘 | ZhangQi MaYong DengQuan | 2012 | JournalofChongqingUniversityofTechnology(NaturalScience)2012，26，8： | 1 |
| 6 | A 1.8-V 240-MHz 2.19-mW Four-Stage CMOS OTA with a Segmenting Frequency Compensation Technique显示文摘A four-stage Operational transconductance amplifier(OTA)used in an infrared temperature sensor adopting the proposed Feed-forward Gm-stage and segmenting nested Miller compensation technique is presented.The purpose of the proposed segment compensation is primarily to make more amplifier stages concatenated.The circuit linked several transconductance stages to form a segment,and linked several segments to form a large multistage amplifier.For example,a twostage amplifier linked with a three-stage amplifier can realize a five-stage amplifier,two three-stage amplifiers linked can realize a six-stage amplifier.A four-stage amplifier in the form of 2+2(two stages and two stages)was used as an example to verify this compensation method.The proposed OTA is designed in the 180 nm complementary metal oxide semiconductor process.It consists of two parts which ensure the stability and improve the bandwidth performance.The first part is a feedforward transconductance stage,and the second part is the two-segment transconductance stages with the Miller compensation techniques employed within and between the two segments.Based on the small-signal model,stability analysis and theoretical derivation are performed in theory.On condition of a 2-pF load capacitance,a direct current gain of 109 dB and a gain-bandwidth of 240 MHz with a phase margin of 50°can be achieved.The proposed design consumes 2.19 mW in a 1.8-V supply voltage.The transient simulation indicates that the settling time of the output is 19 ns with the settling error being 1%,and the slew rate is 114 V/μs. | LIANG Yuhua ZHENG Zirui LIU Shubin LI Dengquan DING Ruixue ZHU Zhangming | 2021 | Chinese Journal of Electronics2021，30，5： | 0 |
| 7 | Aqueous Solution Preparation of Ruthenium Nanoparticles Using Ammonium Formate as the Reducing Agent显示文摘Ruthenium, one of the platinum group metals, has drawn much attention due to its catalytic behavior, hardness, electrical conductivity and density. Ruthenium particles are usually prepared on a small scale by the polyol process, however, the size of the obtained ruthenium nanoparticles is most below 10 nm. In this work, ruthenium particles about 200 nm in diameter were obtained in aqueous solution by using ammonium formate as the reducing agent. To have a better control of particle's size and shape, the effects of PVP, mixing mode, reaction temperature, solution pH and calcination temperature were investigated. | LIU Shaohong CHEN Jialin GUAN Weiming BI Jun CHEN Nanguang CHEN Dengquan LIU Manmen SUN Xudong | 2012 | 贵金属2012，33，A01： | 0 |
| 8 | Returning Native before Going towards the World—Comments on The Discourse of Traditional Chinese Literary Theory显示文摘《中国古代文论话语》一书,不仅将'重建中国文论话语'放在'二十一世纪中国文化发展战略'的高度予以论述,而且将'返回自己的家园'作为'重建中国文论话语之路'的逻辑起点与首要步骤。所谓'返回家园',一是'返回语言之家',二是'返回精神之家'。该书还从中西诗学、中外文学的差异性、共通性入手,结合中国古代文论的独特话语方式,遴选出'言象意道'、'以少总多'、'虚实相生'这样三种话语,将它们放在'中西诗学的双向熔铸'中进行提炼与升华,促使这些话语从沉睡中警醒、从枯萎中复苏,获得新的言说能力。 | Xiang Tianyuan & Hu Dengquan,Southwest Normal University | 2005 | Comparative Literature:East & West2005，，1： | 0 |
| 9 | Deep Reinforcement Learning Based Bi-layer Optimal Scheduling for Microgrids Considering Flexible Load Control显示文摘In this paper,the bi-layer scheduling method for microgrids,based on deep reinforcement learning,is proposed to achieve economic and environmentally friendly operations.First,considering the uncertainty of renewable energy,the framework of day-ahead and intra-day scheduling is established,and the implementation scheme for both price-based and incentive-based demand response(DR)for the flexible load is determined.Then,comprehensively considering the operating characteristics of the microgrid in the day-ahead and intra-day time scales,a bi-layer scheduling model of the microgrid is established.In terms of algorithms,since day-ahead scheduling has no strict requirement for dispatching time,the particle swarm optimization(PSO)algorithm is used to optimize the time-of-use electricity price and distributed power output for the next day.Considering the environmental fluctuations and requirements for rapidity of intra-day online scheduling,the deep reinforcement learning(DRL)algorithm is adopted for optimization.Finally,based on the data from the actual microgrid,the rationality and effectiveness of the proposed scheduling method is verified.The results show that the proposed bi-layer scheduling based on the PSO and DRL algorithms achieves the optimization of scheduling cost and calculation speed,and is suitable for microgrid online scheduling. | Zitong Zhang Jing Shi Wangwang Yang Zhaofang Song Zexu Chen Dengquan Lin | 2023 | CSEE Journal of Power and Energy Systems2023，9，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员