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不同严重程度OSAHS伴慢阻肺对患者认知功能的影响

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临床肺科杂志 2014年第9期19卷 1676-1677页

作者：戈艳蕾李立群王红阳张敏李琳曹书华天津中医药大学研究生院天津300073 河北联合大学附属医院呼吸科河北唐山063000 天津市第一中心医院重症医学科天津300073

目的探讨不同严重程度阻塞性睡眠呼吸暂停低通气综合征(OSAHS)伴慢阻肺对患者认知功能影响。方法入住的116例OSAHS伴慢阻肺患者,依据睡眠呼吸暂停低通气指数(AHI)分为轻、中、重3组。进行简易智能精神状态检查量表(MMSE)检测,分析各组... 详细信息

目的探讨不同严重程度阻塞性睡眠呼吸暂停低通气综合征(OSAHS)伴慢阻肺对患者认知功能影响。方法入住的116例OSAHS伴慢阻肺患者,依据睡眠呼吸暂停低通气指数(AHI)分为轻、中、重3组。进行简易智能精神状态检查量表(MMSE)检测,分析各组患者认知障碍发生情况。结果重度OSAHS伴慢阻肺组MMSE总分明显低于轻、中度OSAHS伴慢阻肺组,在记忆力、注意力和计算力、回忆能力得分明显低于轻、中度OSAHS伴慢阻肺组,差异有显著性统计学意义(P0.05)。结论重度OSAHS伴慢阻肺患者较轻、中度OSAHS患者认知功能明显下降,主要表现在记忆、计算、回忆方面的损害。

关键词：阻塞性睡眠呼吸暂停低通气综合征慢阻肺认知障碍

Research progress of ionic liquids-based gels in energy storage,sensors and antibacterial

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Green Chemical Engineering 2021年第4期2卷 368-383页

作者： Yi-Ru Gao Jian-Fang cao Yang shu Jian-hua Wang Department of Chemistry College of SciencesNortheastern UniversityShenyang110819China

In the past few years,ionic liquids(ILs)-based gels(gels contain ILs)have become a research ***-based gels combine the properties of gels with intrinsic ILs *** to the existence form and function of the ILs in the gel,the ILs-based gels are divided into three *** is ILs hydrogels which the PILs,ILs polymerized into poly-ionic liquids,copolymerized with other polymers served as the continuous phase in the gel *** type of gel can usually absorb water and is an ILs *** other is ionic gels that are usually synthesized by high-molecular organic polymers as spatial network structure and ILs as a dispersed phase,which maintained the good performance of *** third one is that the ILs acts as both the continuous phase and the dispersed phase of the *** all research fields,the pursuit of new materials aims at functional materials,which enhances specific and efficiency,and ultimately *** application of ILs-based gels ranges from energy storage,sensing,electrochemical devices,to antibacterial and gas *** synthesis methods have different performances and applications of ILs-based *** purpose of this review is to provide the latest developments on ILs-based gels,perspectives on several applications,and some challenges that need to be aware of in this field.

关键词： Electrolytes Lithium ion battery Supercapacitors Energy storage Sensor Antibacterial

Behavior of Element Vaporization and Composition Control of Fe-Ga Alloy during Vacuum Smelting

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Journal of Iron and Steel Research International 2015年第11期22卷 983-989页

作者： Jian-wu YAN Liang LUO A-fang PENG Chen-shu ZHANG Qing-hua cao Jiangxi Province Key Laboratory of Precision Drive and Control Institute of Micro/Nano Actuation and Control Nanchang Institute of Technology School of Aeronautical Manufacturing Engineering Nanchang Hangkong University

Saturated vapor pressure, critical evaporation temperature and evaporation loss rate of Fe-Ga alloy were calculated under different conditions of Ga and Fe contents with activity coefficients. The relationship between the change of Ga content and melting time was determined. The results demonstrated that saturated vapor pressure of Ga was higher than that of Fe under the same conditions. The difference value of critical evaporation temperature of Ga with and without Ar was nearly 800 K. The critical evaporation temperature of Fe was higher than that of Ga under vacuum, indicating that Ga was more volatile than Fe. At 1800 K, the evaporation rate of Ga was 84 times higher than that of Fe in the melt of Fe81Ga19 alloy. Under this condition, the change of Ga content and smelting time kept a linear relationship. The higher the temperature was, the faster the Ga content decreased, which was consistent with theoretical calculations.

关键词： Fe-Ga alloy vacuum smelting critical evaporation temperature saturated vapor pressure smelting time

Simulation and Instability Investigation of the Flow around a Cylinder between Two Parallel Walls

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Journal of Thermal Science 2015年第2期24卷 140-148页

作者： DOU hua-shu BEN An-Qing Faculty of Mechanical Engineering and Automation Zhejiang Sci-Tech University

The two-dimensional flows around a cylinder between two parallel walls at Re=40 and Re=100 are simulated with computational fluid dynamics(CFD). The governing equations are Navier-Stokes equations. They are discretized with finite volume method(FVM) and the solution is iterated with PISO Algorithm. Then, the calculating results are compared with the numerical results in literature, and good agreements are obtained. After that, the mechanism of the formation of Karman vortex street is investigated and the instability of the entire flow field is analyzed with the energy gradient theory. It is found that the two eddies attached at the rear of the cylinder have no effect on the flow instability for steady flow, i.e., they don't contribute to the formation of Karman vortex street. The formation of Karman vortex street originates from the combinations of the interaction of two shear layers at two lateral sides of the cylinder and the absolute instability in the cylinder wake. For the flow with Karman vortex street, the initial instability occurs at the region in a vortex downstream of the wake and the center of a vortex firstly loses its stability in a vortex. For pressure driven flow, it is confirmed that the inflection point on the time-averaged velocity profile leads to the instability. It is concluded that the energy gradient theory is potentially applicable to study the flow stability and to reveal the mechanism of turbulent transition.

关键词： numerical simulation cylinder energy gradient theory stability inflection point

Numerical simulation of ice accretion in supercooled large droplet conditions

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Science China(Technological Sciences) 2019年第7期62卷 1191-1201页

作者： cao Yi hua XIN Miao School of Aeronautic Science and Engineering Beihang University

The simulated methods for ice accretion on two-dimensional airfoil surface are established completely under the Eulerian framework in supercooled large droplet(SLD) conditions. The two-dimensional code to solve the partial differential equations(PDEs) of droplet phase is derived to simulate the impingement characteristic of SLD. Also, several semi-empirical models which explain the droplet-wall interaction are compared and discussed to show respective features when simulating the splashing phenomenon. In particular, a new boundary condition for wall called penetrable wall for splashing droplet(PWSD) is proposed to deal with the impingement of SLD on solid surface, which efficiently improves the accuracy of simulation. Then the improved impingement characteristic of SLD is input into the extended mass and heat transfer model to simulate the ice growth on airfoil surface. The multistep advanced method is carried out to better match the physical phenomenon of ice growth. At last, the simulated results of critical parameters: local droplet collection efficiency and the height of ice growth are compared with the experimental data which verify the applicability of proposed models.

关键词： numerical simulation supercooled large droplet ice accretion penetrable wall for splashing droplet

Gastroduodenal intussusception due to gastric schwannoma treated by billroth Ⅱ distal gastrectomy:One case report

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World Journal of Gastroenterology 2015年第7期21卷 2225-2228页

作者： Jia-hua Yang Min Zhang Zhi-hua Zhao Yu shu Jun Hong Yi-Jun cao Department of General Surgery Putuo Hospital Shanghai University of Traditional Chinese Medicine

Schwannomas are rarely observed in the gastrointestinal *** most common symptoms of a gastric schwannoma are abdominal pain or dyspepsia,gastrointestinal bleeding,and an abdominal *** gastric schwannomas are asymptomatic and are discovered incidentally or at *** diagnosis of a schwannoma is based on immunohistochemical positivity for S-100 *** a case report of a rare complication of gastric schwannoma causing gastroduodenal intussusception that was successfully managed by a BillrothⅡdistal *** this rare case,the patient had intermittent,colicky abdominal pain,nausea,and vomiting for over 4wk accompanied by a weight loss.A diagnosis of gastric intussusception was made by computed tomography.A BillrothⅡdistal gastrectomy was then performed,and complete en bloc removal(R0 resection)was *** confirmed a gastric schwannoma through positive immunohistochemical staining for S-100 protein.

关键词： Gastroduodenal intussusception Gastric schwannoma

心复康丸对压力超负荷大鼠心肌组织microRNA-1影响的实验研究

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天津中医药 2017年第1期34卷 48-53页

作者：梁勇郭鹏陈作李艳灵刘永宇孙玲曹书华高克俭天津中医药大学研究生院天津300193 天津市北辰区中医医院重症医学科天津300400 天津市儿童医院药剂科天津300134

[目的]观察心复康丸对压力超负荷大鼠所致的心肌肥厚和心室重塑的干预作用,并研究其作用机制是否与影响心肌组织microRNA-1(miR-1)的表达有关。[方法]Wistar雄性大鼠采用腹主动脉缩窄的方法复制心肌肥厚和心室重塑的模型。术后4周,将模... 详细信息

[目的]观察心复康丸对压力超负荷大鼠所致的心肌肥厚和心室重塑的干预作用,并研究其作用机制是否与影响心肌组织microRNA-1(miR-1)的表达有关。[方法]Wistar雄性大鼠采用腹主动脉缩窄的方法复制心肌肥厚和心室重塑的模型。术后4周,将模型动物随机分为模型组(M组)、依那普利组(E组)、心复康丸低剂量组(L组)、心复康丸高剂量组(H组)。假手术组(S组)不结扎腹主动脉,其他处理相同。分别于术后8、12周,Masson染色观察心肌组织的胶原容积分数。免疫组织化学法检测心肌组织中钙离子ATP酶(SERCA2)、Fibullin-2蛋白表达的变化。实时聚合酶链反应(PCR)法检测心肌组织miR-1表达的改变。[结果]术后8、12周各时间点,与M组比较,E组和H组大鼠心肌纤维化面积显著减少(P<0.01)。术后8、12周各时间点,与M组比较,H组心肌组织Fibullin-2显著降低(P<0.01),SERCA2显著升高(P<0.01),miR-1表达显著升高(P<0.01),L组仅在8周时心肌组织Fibullin-2的表达有明显改变(P<0.05)。[结论]心复康丸可能通过促进mi R-1表达,调控其靶因子Fibullin-2蛋白,抑制心肌纤维化,进而在抑制心肌肥厚和心室重构的过程中发挥作用。

关键词：心复康丸 microRNA-1 压力超负荷心肌肥厚

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碟形水下滑翔器耐压壳的结构优化

海洋技术学报 2018年第3期37卷 1-7页

作者：刘德良曹淑华王天霖路慧彪大连海事大学船舶与海洋工程学院辽宁大连116022

碟形水下滑翔器作为一种优点众多的新型水下滑翔器,近年来得到广泛应用。其液压浮力调节系统、姿态控制系统以及转向控制系统必须安装在耐压壳体内部,因此,对于耐压壳体的设计来说,尽量小的重量和尽量大的有效容积是其设计时的重要技术... 详细信息

碟形水下滑翔器作为一种优点众多的新型水下滑翔器,近年来得到广泛应用。其液压浮力调节系统、姿态控制系统以及转向控制系统必须安装在耐压壳体内部,因此,对于耐压壳体的设计来说,尽量小的重量和尽量大的有效容积是其设计时的重要技术指标。为了得到最优结构,采用尺寸优化方法,以壳体厚度、两道环肋的高度作为设计变量对耐压壳进行优化设计,以期达到强度足够高、最大变形值小于容许变形值和质量最小的轻量化目标。优化后,质量较初始设计减少了30%,轻量化效果明显,并对最终选择的结构进行屈曲分析,其临界压力远大于许用压力。

关键词：碟形水下滑翔器耐压壳有限元数值模拟优化设计

Multiple Impact Factor Based Accuracy Analysis for Power Quality Disturbance Detection

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CSEE Journal of Power and Energy Systems 2023年第1期9卷 88-99页

作者： Zijing Yang Haochen hua Junwei cao Electromechanical Engineering Beijing Institute of Graphic CommunicationBeijing 102600China College of Energy and Electrical Engineering Hohai University 211100China Beijing National Research Center for Information Science and Technology Tsinghua UniversityBeijing 100084China

Nowadays,power quality problems are affecting people’s daily life and production *** an aim to improve disturbance detection accuracy,a novel analysis approach,based on multiple impact factors,is proposed in this ***,a multiple impact factors analysis is implemented in which two perspectives,i.e.,the wavelet analysis and disturbance features are simultaneously *** key factors,including wavelet function,wavelet decomposition level,redundant algorithm,event type and disturbance intensity,and start and end moment of disturbance,have been ***,an impact factor based accuracy analysis algorithm is proposed,through which each factor’s potential impact on disturbance location accuracy is *** transforms,i.e.,the classic wavelet,lifting wavelet and redundant lifting wavelet are employed,and their superiority on disturbance location accuracy is ***,simulations are conducted for *** the proposed method,the wavelet based parameters can be validly selected in order to accurately detect power quality disturbance.

关键词： Disturbance location accuracy impact factors power quality wavelet analysis