Treatment of Septic Arthritis With Acoustic Cavitation and Lavage: A Case Report

A 2-year-old Quarter Horse filly was admitted to our facility with a two-day history of trauma caused by barbed wire on the front face of the right front limb fetlock joint. A septic arthritis was confirmed with the synovial fluid examination. The cytologic evaluation of synovial fluid showed 101,000 leukocytes/mm³, 90% neutrophils, and a total protein concentration of 4 g/dL. It was, therefore, decided to perform an arthroscopic lavage using an ultrasonic device with the tip inserted inside the synovial cavity to exploit the phenomenon of acoustic cavitation. After the removal of the synovial pannus, the probe was left to vibrate in the area near the visible penetrating wound inside the joint until three liters of saline was finished. Further studies are needed for understanding and applying this technology in different equine fields and with different bacterial species. However, these first results are promising for the efficacy of this innovative procedure.     

采棉头采摘装置的设计及试验

为小型自走梳齿式采棉机的采棉头设计了采摘装置,该采摘装置由10组带齿链条在采棉室内按一定规律分布而成,由链轮链条机构传动,单向回转。为研究该装置的齿片长度、齿片在链条上的排列方式、带齿链条的转速、采棉装置前进速度对采摘装置的采净率、籽棉含杂率和撞落棉损失率的影响,进行了单因素试验和多因素正交试验。试验结果表明：当齿片的长度为22 mm,齿片在链条上等间距对称安装,带齿链条的回转速度为100 r/min,采棉装置的前进速度为0.3 m/s时效果最好,采摘装置采收棉花的采净率为89.74%,籽棉含杂率为10.32%,撞落棉损失率为6.24%。     

Mode-Superposition Method for Passive Energy Dissipation Structures

The methods of equivalent linearization of different energy dissipation devices are different in analyzing passive energy dissipation structure including different type of energy dissipation device by using of mode-superposition response spectrum method based on equivalent linearization, which results in the differences in computing accuracy and cost in dynamic analysis. For structures separately installed different energy dissipation devices, authors utilize relatively uncoupled mode-superposition method and complex mode-superposition method for contrast analysis, and probe into the suitability of the two methods in the dynamic analysis of passive energy dissipation structure. Numerical results show that complex mode-superposition method could be better for structure with viscous dampers in order to guarantee accuracy, and relatively uncoupled mode-superposition method is recommended for structure with viscoelastic, metallic or frictional ones.     

基于Kano-QFD模型的家庭阳台微型水培装置设计

家庭阳台水培以观赏性强、整洁方便、绿色安全等特点拥有广阔的市场前景,以家庭阳台水培为设计目的、以用户需求为导向的家庭水培装置能够有效满足当前的市场需求。行为地图法与Kano模型的结合能够准确收集用户需求及重要度,QFD质量屋模型可将产品质量要素按照用户需求重要程度进行排序。据此进行方案优化,指导完成以用户需求为导向的装置设计。装置具有空间集约、造型美观、便于移动及固定、有效减轻水培液浪费污染、电线收纳便捷等优点,更适用于家庭水培。同时,新材料应用等也将成为装置未来提升的方向。     

成孔机构与土壤相互作用的力学模型及应用

为实现油菜移栽机成孔机构形成满足农艺要求的栽植孔,并为设计新型移栽机提供理论依据,针对不同类型土壤具有不同物理机械力学特性等问题,进行成孔机构与土壤相互作用力学试验研究。分析土壤极限抗剪承载力Qu与土壤摩擦阻力Qf的计算公式,建立成孔机构与土壤相互作用的力学模型,完成不同类型土壤的物理机械力学特性指标的测定,结合成孔机构相关结构参数,求解圆柱形孔刺垂直刺入土壤75cm处所受抗剪阻力Ff1与垂直弹出土壤时所受摩擦阻力Ff2,得出圆柱形孔刺在不同类型土壤中,其抗剪阻力Ff1最大值1139.7N,摩擦阻力Ff2最大值达到107.6N。该研究为设计栽植孔成型机构提供了试验依据,为进一步研究不同类型土壤与成孔机构的阻力提供了理论依据。     

Site selection for a measuring and controlling device of initial phase based on maximum elevation angle

We introduced a site selection method based on the modified maximum elevation angle intended for mountains possibly affecting the measurement and control of the initial phase in a launching port located in mountainous areas. To use the former analysis results, the method, along the helices whose center is the launcher's project point, analyze each point's visibility on the helices. The visible area can be obtained by comparing the visibility at each moment in the initial phase. Finally, there can be three points in the above visible area with distances longer than required.     

Small scale wind tunnel for high pressure and high energy discharge

A kind of small scale wind tunnel with low velocity is proposed according to the characteristics of strong ionization discharge chamber and the demands of discharge for flux, velocity and flow fields. On the precondition that the airflow field and velocity is satisfied, aerodynamic design and structural design are carried out. Key techniques are studied including overall structure, aerodynamic and structural design of airflow vent and collection vent, aerodynamic and structural design of power section, flow rate adjustment and control, and cooling system of motor. Based on the design scheme, a small scale wind tunnel with strong ionization discharge for an enterprise is developed. Application indicates that the small scale wind tunnel is a practical and effective airflow loop device for high pressure and strong ionization discharge with the features of stability and reliability.     

Power supply and electromagnetic simulation of implantable medical devices

It is studied how to charge the battery of the implanted medical device through the skin according to its bio electrical characteristics.Energy delivery model of volume conduction is created by FEMlab 3.3 (Finite Element Model Lab),using AC voltage as the input.In simulation,the frequency characteristic of the model is tested,and then 4 different shapes of electrodes are designed.Taking cylindrical electrode for example,the shape and layout of electrode are optimized by changing the electrodes’ cross section areas and the distance between the electrodes.According to the simulation results,current transmitting efficiency can reach above 30% under the premise of ensuring human security.     

供暖锅炉消烟除尘装置的选择

各种锅炉消烟除尘设备都有自己的使用范围,本文主要介绍了供暖锅炉在消烟除尘选用中应考虑的问题,阐明选用消烟除尘设备时要充分了解其技术范围及其经济性能。