探讨中度混合痔给予弹力线套扎剥扎术治疗的临床效果

目的分析中度混合痔给予弹力线套扎剥扎术治疗的临床效果。方法选取2018年1月—2023年4月本院收治的123例中度混合痔患者进行研究,随机分为观察组(62例,弹力线套扎剥扎术)与对照组(61例,传统外剥内扎术)。分析两组患者临床疗效、临床指标、应激指标水平。结果观察组患者临床疗效显著高于对照组(P<0.05);观察组患者手术时间、术中出血量、住院时间显著低于对照组(P<0.05);观察组患者ACTH、COR水平显著低于对照组(P<0.05)。结论弹力线套扎剥扎术可显著提高对患者治疗效果,减少术中出血与手术时间,改善患者应急指标水平,值得广泛推广。

ISG型中度混合动力汽车驱动工况控制策略优化

在汽车动力学理论的基础上,通过对基于集成起动机/发电机(Integrated starter/Generator,ISG)的中度混合动力汽车(Medium hybrid electric vehicle,Medium-HEV)的系统效率进行瞬时优化计算,得到ISG型中度混合动力汽车控制策略,确定控制策略中三个关键系数:电池电量切换阈值XSC,发动机充电曲线系数Xe_chg和发动机关闭曲线系数Xe_off,以及它们的取值范围。在Matlab/Simulink仿真平台下,建立ISG型中度混合动力汽车整车仿真模型,将电池电量变化值△SC折算为等效油耗,以ISG型中度混合动力系统综合油耗最小为优化目标优选三个系数的取值,从而确定ISG型中度混合动力系统动力源的匹配和优化控制策略。仿真结果表明,与传统汽车相比,ISG型中度混合动力汽车的油耗降低了36.95%,明显提高了中度混合动力系统燃油经济性。

ISG型中度混合动力汽车动力驱动系统设计及性能仿真

针对ISG型轻度混合动力汽车的局限性,开展了ISG型中度混合动力汽车驱动系统设计研究。根据整车性能指标要求,进行了整车动力驱动系统包括发动机、ISG电机、蓄电池以及相关动力传动系统的参数设计;提出了ISG型中度混合动力汽车的基本控制策略;利用Matlab/Si mulink软件平台,建立了整车的动力学模型,并在选定的循环工况下,对整车性能进行了仿真。仿真结果表明:所设计的驱动系统参数匹配较为合理,整车动力性达到了相应的要求,燃油经济性得到了明显提高。

ISG型中度混合动力汽车能量管理策略研究

在汽车动力学基础上,对ISG型中度混合动力汽车在不同工作模式下的系统效率进行瞬时优化,以系统效率最高为优化目标,得到工作模式切换规律。在瞬时优化结果的基础上,采用全局最优化方法,分别计算在不同工况下道路循环单元ECE和EUDC的油耗与SOC变化值。根据油耗与SOC变化值,对不同工况下的循环单元进行排列组合,制定了十种不同的能量管理策略。仿真结果表明,根据不同的道路情况和驾驶意图,可以选择最优的能量管理策略,以达到降低油耗和平衡SOC的目的。

AMT中度混合动力汽车经济性换挡规律研究

针对装备机械自动变速器(AMT)的中度混合动力汽车,综合考虑发动机、电动机/发电机、电池和传动系统的效率,以动力传动系统效率最优为目标,确定了驱动工况各工作模式工作区域。在此基础上,分别对各模式下的经济性换挡规律进行研究,获得了中度混合动力汽车驱动工况下的经济性换挡规律。在MATLAB/Simulink平台上,采用ECE+EUDC循环工况对所提出的经济性换挡规律进行仿真,结果表明,与ADVISOR中的传统换挡控制规律相比,所提出的换挡控制规律能较好地提高整车的燃油经济性。

汽车混合动力系统技术与发展

对混合动力核心系统电压能源管理系统的发展过程进行了介绍,包括:传统的12伏电压能源管理系统;过渡的双电压能源管理系统;先进的单42伏电压电能分配能源管理系统。通过对中度混合动力驱动系统的结构介绍,指出国内外汽车制造商对混合动力系统技术发展前景的看法。

混合动力汽车现状与发展

随着能源和污染问题的日益严峻,对混合动力汽车的需求逐渐显现。本文通过对电动汽车类型、国内外混合动力汽车的研究及应用、混合动力汽车的分类及性能等方面的介绍,论述了混合动力汽车的现状与发展。

痔疮套扎术用于治疗轻中度痔疮临床疗效观察

目的：探讨分析痔疮套扎术对轻中度痔疮的治疗效果。方法：对我院2010年1月趸2013年1月收治的48例轻中度痔疮患者利用痔疮套扎术治疗的临床资料进行总结，分析痔疮套扎术的临床疗效。结果：本组病例48例，行痔疮套扎术后，治愈44例，好转4例，总有效率为100％，治愈率达91．67％。手术平均时间约为8±2min，术后留观1～2天，7－１０d全部病例均有好转。结论：痔疮套扎术可明显减轻痔疮患者的疼痛，手术时间短，术中出血量少，对于临床轻中度混合痔及内痔的治疗有重要意义。

Comparative study on chalcopyrite bioleaching with assistance of different carbon materials by mixed moderate thermophiles

The catalysis of four carbon materials including artificial graphite(AG), carbon black(CB), activated carbon(AC) and carbon nanotube(CN) on chalcopyrite bioleaching by mixed moderate thermophiles was comparatively investigated. In AC and AG added bioleaching groups, low solution pH and suitable redox potential values, high total iron and ferric iron concentrations, and large number of adsorbed bacteria were obtained, resulting in high copper extractions. CB and CN inhibited the growth of bioleaching bacteria and led to the low bioleaching efficiency.X-ray diffraction analysis showed that jarosite and sulfur film were the main components of passivation layer with the addition of AG and AC,but did not hinder the dissolution of chalcopyrite. Microbial community structures of free and attached cells in AC and AG added groups changed dramatically compared with mixed moderate thermophiles. The sulfur-oxidizing bacteria of A. caldus S1 strain dominated the microbial community(93%-98%) at the end of bioleaching.The iron-oxidizing bacteria of L.ferriphilum YSK only accounted for low percentage(1%-2%).

A modified method to estimate eddy diffusivity in the North Pacific using altimeter eddy statistics

The method proposed by Stammer (1998) is modified using eddy statistics from altimeter observation to obtain more realistic eddy diffusivity (K) for the North Pacific. Compared with original estimates, the modified K has remarkably reduced values in the Kuroshio Extension (KE) and North Equatorial Counter Current (NECC) regions, but slightly enhanced values in the Subtropical Counter Current (STCC) region. In strong eastward flow areas like the KE and NECC, owing to a large difference between mean flow velocity and propagation velocity of mesoscale eddies, tracers inside the mesoscale eddies are transported outside rapidly by advection, and mixing length L is hence strongly suppressed. The low eddy probability (P) is also responsible for the reduced K in the NECC area. In the STCC region, however, L is mildly suppressed and P is very high, so K there is enhanced. The zonally-averaged K has two peaks with comparable magnitudes, in the latitude bands of the STCC and KE. In the core of KE, because of the reduced values of P and L, the zonally-averaged K is a minimum. Zonally-integrated eddy heat transport in the KE band, calculated based on the modified K, is much closer to the results of previous independent research, indicating the robustness of our modified K. The map of modified K provides useful information for modeling studies in the North Pacific.

Composition and Distribution of Planktonic Ciliates in the Southern South China Sea During Late Summer： Comparison Between Surface and 75 m Deep Layer

Ciliates are very important components in most marine ecosystem. They are trophic link between the microbial food web and grazing food chain. In this study, ciliates were collected from 11 sites in the southern South China Sea （SCS） during August 25 to September 28, 2011. Their composition and distribution at the surface and 75m deep depth of the ocean were studied. A total of 30 species belonging to 22 genera were identified, and 22 species of 15 genera were Tintinnids. Eutintinnusfraknoii and E. stramentus were the most common species. The other dominants were strombidiids ciliates including Strombidium conicum and S. globosaneum, which were followed by the tide form, Mesodinium pulex. Ciliates abundance ranged from 46 indL-1 to 368 indL-1 in the open sites, 46-368indL-1 at surface and 73-198indL-1 at 75m deep layer. In the Yongshu reef, ciliates abundance ranged from 167indL-1 to 365 ind L-1 in the water colunm, similar to that in Sanya coral reef waters. Ciliates composition showed obvious difference between surface and 75m deep layer at station S2 （P〈0.05）, while no similar result was observed at other sites. At 75m deep layer, salinity was negatively related to mixed layer depth （P〈 0.05）, but positively to chlorophyll a concentration （P〈 0.05）, indicating that the change of vertical mixing in water column influenced vertical distribution of ciliates in the southern SCS.

吻合器痔上黏膜环切术加外痔切除术的临床有效率分析

目的:探究吻合器痔上黏膜环切术加外痔切除术的临床有效率。方法:收治中度及重度混合痔患者80例,在征得患者同意下行不同的手术方式治疗,常规组(40例)行外剥内扎术治疗,干预组(40例)行吻合器痔上黏膜环切术加外痔切除术治疗,对比两组的治疗效果与治疗情况,进行统计学分析。结果:干预组治疗有效率(92.50%)明显高于常规组(75.00%),差异有统计学意义(P<0.05)。干预组患者的术中出血量与住院时间均少于常规组,差异有统计学意义(P<0.05)。结论:行吻合器痔上黏膜环切术加外痔切除术治疗中度及重度混合痔,提高了治疗有效率,减少了术中出血量,缩短了住院时间,促进了患者恢复,具有显著的治疗效果。

Convergence Study of Chinese Carbon Intensity

This paper establishes the theoretical hypothesis of carbon intensity convergence, and through statistics to analyze and describe the whole country and the eastern and western regions with the use of mixed regression model and fixed effects regression method, and test σ -convergence, absolute convergence and conditional convergence in order to have an empirical study on carbon convergence hypothesis.

The Voluntary Continuation in the Obligatory System of the Social Security Law

The system of obligatory insurance, regulated by the Social Security Law, includes the design of a mixed system, which allows workers to continue contributing to the social security. This mixed system, called voluntary continuation in the obligatory system, contemplates the option for workers who have concluded a work relationship and who wish to continue accumulating weekly contributions necessary to obtain the disability and life insurance rights, such as those of dismissal in old age, and are considered in the Social Security Act of 1973.