检索结果-南通市图书馆

口腔内窥镜联合超声技术寻找隐匿性根管的效果观察

在线全文

学校读者我要写书评

暂无评论

口腔疾病防治 2017年第11期25卷 733-736页

作者：龙明生瞿小维董红湖北医药学院附属东风口腔医院口腔内科湖北十堰442000

目的评价口腔内窥镜联合超声技术寻找隐匿性根管的效果。方法选取根管治疗时开髓后裸眼下未能顺利找到根管的疑难病例87例,应用口腔内窥镜联合超声技术重新寻找根管口并疏通根管,计算成功率。结果疑难病例87例共发现121个隐匿性根管,其... 详细信息

目的评价口腔内窥镜联合超声技术寻找隐匿性根管的效果。方法选取根管治疗时开髓后裸眼下未能顺利找到根管的疑难病例87例,应用口腔内窥镜联合超声技术重新寻找根管口并疏通根管,计算成功率。结果疑难病例87例共发现121个隐匿性根管,其中钙化根管64个,细小根管弯曲根管39个,变异根管18个,成功疏通94个,总成功率为77.68%。对钙化、细小弯曲、变异根管各类型隐匿性根管应用口腔内窥镜联合超声技术寻找及疏通成功率的差异无统计学意义(χ~2=5.477,P>0.05)。结论口腔内窥镜联合超声技术有助于寻找隐匿性根管。

关键词：口腔内窥镜超声技术隐匿性根管钙化根管根管治疗

Gradient-Based Differential kWTA Network With Application to Competitive Coordination of Multiple Robots

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2022年第8期9卷 1452-1463页

作者： Mei Liu Xiaoyan Zhang mingsheng Shang long Jin School of Information Science and Engineering Lanzhou UniversityLanzhou 730000 State Key Laboratory of Tibetan Intelligent Information Processing and Application Xining 810016China Chongqing Key Laboratory of Big Data and Intelligent Computing Chongqing Institute of Green and Intelligent TechnologyChinese Academy of SciencesChongqing 400714China Shenzhen Research Institute Lanzhou UniversityShenzhen 518063China

Aiming at the k-winners-take-all(kWTA)operation,this paper proposes a gradient-based differential kWTA(GDk WTA)*** obtaining the network,theorems and related proofs are provided to guarantee the exponential convergence and noise resistance of the proposed GD-kWTA ***,numerical simulations are conducted to substantiate the preferable performance of the proposed network as compared with the traditional ***,the GD-k WTA network,backed with a consensus filter,is utilized as a robust control scheme for modeling the competition behavior in the multi-robot coordination,thereby further demonstrating its effectiveness and feasibility.

关键词： Consensus filter k-winners-take-all(kWTA) multirobot coordination noise resistance

不同器械预备根管对根管治疗期间急症发生率的评价

在线全文

学校读者我要写书评

暂无评论

口腔材料器械杂志 2006年第3期15卷 129-131页

作者：朱习华董红龙明生周静郧阳医学院附属十堰市东风口腔医院口腔内科湖北442008

目的探讨手用K锉与H锉结合使用预备根管对根管治疗期间的急症(Endodontic interappointment emergencies IAE)的预防效果。方法将250例患者250牙髓炎患牙按牙位、年龄、性别随机分为A、B两组,A组140例,140颗牙采用手用K锉逐步后退法预... 详细信息

目的探讨手用K锉与H锉结合使用预备根管对根管治疗期间的急症(Endodontic interappointment emergencies IAE)的预防效果。方法将250例患者250牙髓炎患牙按牙位、年龄、性别随机分为A、B两组,A组140例,140颗牙采用手用K锉逐步后退法预备根管;B组110例,110颗牙采用手用K锉与H锉结合使用预备根管,对A、B两组IAE发生率比较,两组根管预备后6h、24h、72h、3d-1w疼痛程度比较。结果A、B两组IAE发生率分别为27．14％和14．55％,有显著差异(P<0．05);B组疼痛程度比A组轻,差异具有统计学意义(P<0．05)。结论手用K锉与H锉结合使用预备根管可减少IAE的发生率及疼痛程度。

关键词： K锉与H锉器械根管预备根管治疗期间的急症

在线全文

学校读者我要写书评

暂无评论

上颌第三磨牙根管形态的显微研究

国际口腔医学杂志 2014年第3期41卷 262-264页

作者：龙明生陆俊刘彩云董红湖北医药学院附属东风口腔医院口腔内科十堰442000

目的研究上颌第三磨牙根管的解剖形态并寻找牙根与根管之间的对应关系。方法从150颗患者被拔除的上颌第三磨牙中，筛选牙体较完整的融合根30颗和分叉根17颗，利用显微cT扫描后行三维重建，观察其根管全貌，并对根管类型进行统计分析。结... 详细信息

目的研究上颌第三磨牙根管的解剖形态并寻找牙根与根管之间的对应关系。方法从150颗患者被拔除的上颌第三磨牙中，筛选牙体较完整的融合根30颗和分叉根17颗，利用显微cT扫描后行三维重建，观察其根管全貌，并对根管类型进行统计分析。结果17颗分叉根的根管形态全部为3管型或4管型，其中15颗根管数目与牙根数目一致；30颗融合根则出现了多种根管形态，其根管数目为1～4个不等。结论上颌第三磨牙根管形态变异大，但分叉根的根管形态相对简单，而融合根的根管形态反而复杂，牙根和根管数目往往不一致。

关键词：上颌第三磨牙根管显微CT

Insights into the stable and fast lithium storage performance of oxygen-deficient LiV_(3)O_(8) nanosheets

在线全文

学校读者我要写书评

暂无评论

Nano Research 2021年第3期14卷 814-822页

作者： Huanqiao Song Feng Liu mingsheng Luo Department of Chemical Engineering Beijing Institute of Petrochemical TechnologyBeijing102617China Beijing Key Laboratory of Clean Fuels and Efficient Catalytic Emission Reduction Technology Beijing102617China

Oxygen-deficient LiV_(3)O_(8) is considered as one of the promising cathode materials for lithium ion batteries(LIBs)because of its high cycling stability and rate ***,it is very difficult to control and study the content and position of V^(4+)and oxygen vacancies in LiV_(3)O_(8),and therefore the mechanism of improving electrochemical performance of LiV_(3)O_(8) is still ***,we developed four LiV_(3)O_(8) nanosheets with different V^(4+)and oxygen vacancy contents and *** physicochemical and lithium storage properties indicate that the V^(4+)and oxygen vacancies in the surface layer increase the contribution of pseudocapacitive lithium storage on the nanosheet *** V^(4+)and oxygen vacancies in the lattice improve the electrical conductivity of LiV_(3)O_(8),and enhance the phase transformation and lithium ion diffusion *** adjusting the content of V^(4+)and oxygen vacancies,we obtained an oxygen-deficient LiV_(3)O_(8) nanosheet which maintained more than 93%of the initial reversible capacity after 300 cycles at 5,000 mA·g^(−1).The V^(4+)and oxygen vacancies play an important role in improving the stability and rapidity of lithium *** work is helpful to understand the stable and fast lithium storage mechanism of oxygen-deficient LiV_(3)O_(8),and might lay a foundation for further studies of other oxygen-deficient metal oxide electrodes for long-life and high-power LIBs.

关键词： oxygen-deficient LiV_(3)O_(8) fast lithium storage high stability tetravalent vanadium ion oxygen vacancy

腐蚀对Al-Zn-Mg合金型材疲劳强度影响规律的研究

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

铁道车辆 2022年第1期60卷 107-111,115页

作者：陈鉴王向东潘柏清刘雄丁浩龙明生剡苏荣谢紫华邵晓峰中车株洲电力机车研究所有限公司时代电气制造中心湖南株洲412001

通过腐蚀疲劳、应力腐蚀相结合的方法模拟“服役—停放”状态,研究了不同加速周期下Al-Zn-Mg合金型材的疲劳强度、腐蚀疲劳强度,并通过灰色理论模型预测了Al-Zn-Mg合金材料疲劳强度的衰减规律。结果表明:Al-Zn-Mg合金型材的常规疲劳强... 详细信息

通过腐蚀疲劳、应力腐蚀相结合的方法模拟“服役—停放”状态,研究了不同加速周期下Al-Zn-Mg合金型材的疲劳强度、腐蚀疲劳强度,并通过灰色理论模型预测了Al-Zn-Mg合金材料疲劳强度的衰减规律。结果表明:Al-Zn-Mg合金型材的常规疲劳强度、腐蚀疲劳强度会随模拟加速试验周期的延长而衰减,腐蚀疲劳条件下Al-Zn-Mg合金型材的性能衰减比常规疲劳条件下的性能衰减更快。

关键词： Al-Zn-Mg合金疲劳腐蚀疲劳衰减灰色理论

基于慕课的“PAD课堂”在口腔护理教学中的应用

在线全文

学校读者我要写书评

暂无评论

全科护理 2022年第16期20卷 2161-2165页

作者：徐萍萍余军田苗龙明生吕倩朱俊丽孟慧罗书珍徐兰兰湖北医药学院附属东风口腔医院 442000 湖北医药学院附属国药东风总医院 442000 湖北医药学院护理学院 442000

目的:探究基于慕课的“PAD课堂”教学模式在本科护生口腔教学中的应用效果。方法:采用方便抽样法,从十堰市某高校附属医院选取2017级本科护生33人为对照组,采用传统模式授课;选取2018级本科护生34人为试验组,采用基于慕课的对分课堂模... 详细信息

目的:探究基于慕课的“PAD课堂”教学模式在本科护生口腔教学中的应用效果。方法:采用方便抽样法,从十堰市某高校附属医院选取2017级本科护生33人为对照组,采用传统模式授课;选取2018级本科护生34人为试验组,采用基于慕课的对分课堂模式授课,比较两组护生学习投入程度、评判性思维能力和课堂教学效果。结果:试验组的理论成绩(84.00±7.43)分、实验成绩(76.09±1.55)分、学习投入总分(79.65±12.66)分及评判性思维总分(258.21±23.63)分,均优于对照组(P<0.05),同时对此教学模式也更为满意(P<0.05)。结论:基于慕课的“PAD课堂”模式应用于本科护生口腔护理教学中可行且有效,有助于提升护生的学习投入程度与评判性思维能力,提高整体的教学效果。

关键词：慕课 PAD课堂护生

维普期刊数据库博看期刊

Correlation, entropy, and information transfer in black hole radiation

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2014年第11期59卷 1057-1065页

作者： Baocheng Zhang Qingyu Cai mingsheng Zhan Li You State Key Laboratory of Magnetic Resonances and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsChinese Academy of Sciences Department of Physics State Key Laboratory of Low Dimensional Quantum PhysicsTsinghua University

Since the discovery of Hawking radiation, its consistency with quantum theory has been widely questioned. In the widely described picture, irrespective of what initial state a black hole starts with before collapsing, it eventually evolves into a thermal state of Hawking radiations after the black hole is exhausted. This scenario violates the principle of unitarity as required for quantum mechanics and leads to the acclaimed ‘‘information loss paradox''. This paradox has become an obstacle or a reversed touchstone for any possible theory to unify the gravity and quantum mechanics. Based on the results from Hawking radiation as tunneling, we recently show that Hawking radiations can carry off all information about the collapsed matter in a black hole. After discovering the existence of information-carrying correlation, we show in great detail that entropy is conserved for Hawking radiation based on standard probability theory and statistics. We claim that information previously considered lost remains hidden inside Hawking radiation. More specifically, it is encoded into correlations between Hawking radiations. Our study thus establishes harmony between Hawking radiation and the unitarity of quantum mechanics, which establishes the basis for a significant milestone toward resolving the long-standing information loss paradox. The paper provides a brief review of the exciting development on Hawking radiation. In addition to summarize our own work on this subject, we compare and address other related studies.

关键词：黑洞辐射信息传递统计熵霍金辐射量子力学信息佯谬量子理论初始状态

Analysis of Quasielastic Light Scattering in Ferroelectric Liquid Crystal

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 1994年第9期11卷 585-588页

作者： ZHANG Ping YIN Zhen ZHANG mingsheng HUANG Qiang Department of Physics Nanjing UniversityNanjing 210008 Center for Materials Analysis and National Laboratory of Solid-State Microstructures Nanjing UniversityNanjing 210008 Center for Computation Nanjing UniversityNanjing 210008

Temperature dependence of Raman spectra of ferroelectric liquid crystal MBOPDOB is examined in spectral region 0-30cm-1 with spectral emphasis on the quasielastic light scattering near solid-Sm C**** quasielastic components are well fitted to Debye-type susceptibility *** increase of temperature the inverse of the relaxation time T linearly goes to zero in the temperature range below the transition,manifesting a critical *** relaxation time keeps same big value in the Sm C*phase as that at the transition point owing to long orientational relaxation in the liquid phase.

关键词： transition. relaxation elastic