In vitro performance of a biodegradable zinc alloy adjustable-loop cortical suspension fixation for anterior cruciate ligament reconstruction

Anterior cruciate ligament(ACL)injuries of the knee are one of the most common and serious athletic injuries.The widely used cortical suspension fixation buttons for ligament reconstruction are permanent implants,particularly those made from conventional steel or titanium alloys.In this study,a biodegradable Zn-0.45Mn-0.2Mg(ZMM42)alloy with the yield strength of 300.4 MPa and tensile strength of 329.8 MPa was prepared through hot extrusion.The use of zinc alloys in the preparation of cortical suspension fixation buttons was proposed for the first time.After 35 d of immersion in simulated body fluids,the ZMM42 alloy fixation buttons were degraded at a rate of 44μm/a,and the fixation strength was retained(379.55 N)in the traction loops.Simultaneously,the ZMM42 alloy fixation buttons exhibited an increase in MC3T3-E1 cell viability and high antibacterial activity against Escherichia coli and Staphylococcus aureus.These results reveal the potential of biodegradable zinc alloys for use as ligament reconstruction materials and for developing diverse zinc alloy cortical suspension fixation devices.

Button Cell Ingestion in Infants: A Report of Five Cases

Button cell ingestion is a common household accident among infants, often leading to serious complications that require immediate diagnosis and urgent removal. We report five cases of button cell ingestion involving infants aged between 9 and 32 months, including four boys and one girl. The ingestion was accidentally discovered in two infants, while in the other three, it was suspected during play. In three cases, mothers attempted to induce vomiting by giving fluids, but the batteries remained in the digestive tract for 38 hours to 5 days. After confirming the diagnosis, the batteries were removed within 4 to 36 hours. The locations of the cells were the esophagus in two cases, the cardia in one, the stomach in one, and the bowel in one. One case involved a large cell in the esophagus, while the others involved smaller cells. Complications occurred in four cases, including esotracheal fistula, esophageal ulceration, and perforation of the jejunum and caecum. In one case, the digestive mucosa appeared normal upon endoscopy. One patient died.

鼻腔纽扣电池异物的诊断和治疗

我们通过对2例纽扣电池鼻腔异物患者的治疗,检索相关文献,希望对纽扣电池鼻腔异物严重性引起重视,对我们的工作有所指导。

Suture Button装置修复下胫腓联合损伤的初步报告

[目的]探讨Suture Button装置治疗下胫腓联合损伤后的手术方法及临床效果。[方法]对截止于2007年9月利用Suture Button装置固定的下胫腓联合急、慢性损伤的13例病人进行连续随访观察,通过术后X线片数字化测量和标准的踝足功能评分,评估其疗效并探讨临床应用前景。[结果]除1例病人因术后短期再次创伤意外,行2次手术更换为传统螺钉内固定外,其余病人均在术后6周开始部分负重功能锻炼,术后第3个月功能平均评分达到满意,术后第6、12个月功能平均评分达到优良,X线片未发现内固定失效。[结论]Suture Button装置治疗下胫腓联合损伤具有技术简单、手术时间短、内固定器物理特性符合人体正常解剖生理、固定强度足够、无需2次手术取出等多项优势,可能成为下胫腓联合损伤新的治疗标准。

一种使数据窗口画板的Button控件响应用户事件的方法

通过在数据窗口控件中捕获用户事件的特殊技术,扩展了Button控件的应用范围和功能,采用该项技术,可以随心所欲的设计出数据窗口的特殊效果,丰富了数据窗口的表现力。

基于VC的税控机界面的设计与实现

当今软件设计与开发迅速发展,软件的界面在商业软件市场中的作用越来越重要。不同的应用领域对软件界面有着不同的需求。文章在VC++6.0环境下对税控机界面,设计了一种实现个性化Button类控件的动态循环创建的方法。

PowerBuilder6.0/7.0中Button对象的使用

本文介绍了PowerBuilder 6.0/7.0中按钮对象的使用方法。

英语中的“偏旁”

英语中有“偏旁”吗?没有吧,有吗?那么下面这些字母组合,可看作“偏旁”吗?1.-tch构成动词或名词,具有“手的动作”的含义。如:catch v.抓fetch v.取hitch v.勾住,搭match n.比赛tretch v.伸展snatch v.夺,夺取scratch v.抓,搔switch v.开,转stitch v.

实时视频协作的网络学习平台构建

BigBlueButton是一个开源的Web会议系统,可以实时共享视频、音频、演示文稿、桌面、白板等。BigBlueButton建议安装在Ubuntu系统中。它能与Moodle系统进行集成,为在线学习提供更好的协作体验,协助教师开展信息化教学。

基于Android平台下Button控件单击事件和监听器的五种编写

Android平台下的应用越来越广泛,Button控件的监听器程序编写显得尤为重要,笔者结合自身的开发经验,总结了5种Button控件单击事件的监听器的编写方法,在此基础上作了5中方法优劣的阐述。

评价高温合金纯净度的EB BUTTON法

介绍了一种评价高温合金纯净度的新方法──ＥＢＢＵＴＴＯＮ。详细描述了ＥＢＢＵＴＴＯＮ分析操作过程和其结果分析方法。阐述了ＥＢＢＵＴＴＯＮ原理。在评价ＥＢＢＵＴＴＯＮ优缺点的同时，提出了一种提高其分析效果的改进措施。最后，对ＥＢＢＵＴＴＯＮ的应用范围和应用前景作了预测。

Research on rare earth and iron-rich diamond-enhanced tungsten carbide composite button

At the present time in china, the binder used in tungsten carbide composite button is mainly cobalt, which is very expensive. In order to solve the problems, a new type of rare earth and iron-rich diamond-enhanced tungsten carbide with high abrasive resistance and high toughness against impact, which realizes to substitute ferrum for cobalt, has been developed. The key problems in making the button are to improve the mechanical properties of matrix and increase the welding strength between the diamond and the matrix. All these problems have been solved effectively by low temperature activation hot-press sintering, doping rare earth lanthanum in matrix and high sintering pressure. The properties of the button have been determined under laboratory conditions. The test results show that its hardness is more than 90 HRA, its abrasive resistance is 39 times more than that of conventional cemented tungsten carbide, and its toughness against impact is more than 200 J. All these data show the button has very good mechanical properties.

Research on Diamond Enhanced Tungsten Carbide Composite Button

At the present, the cutters used in button bits and rock bits are mainly cobalt tungsten carbide in our country. Because of its low abrasive resistance, the bit service life and drilling efficiency was very low when the hard and extremely hard formations were being drilled. Owing to its high abrasive resistance, the diamond composite material is widely used in drilling operations. However, its toughness against impact is too low to be used in percussion drilling, only can it be used in rotary drilling. In order to solve the problems encountered by DTH hammer in hard rock drilling, make bit life longer, increase rate of penetration and decrease drilling cost, a new type diamond enhanced tungsten carbide composite button with high abrasive resistance and high toughness against impact, which may be used in percussion drilling, has been developed. The key problems to make the button are to improve the thermal stability of diamond, to increase the welding strength between diamond and cemented tungsten carbide, and to lower the sintering temperature of tungsten carbide. All these problems have been solved effectively by pretreatment of diamond, low temperature activation hot-press sintering and high sintering pressure. (1) To plate tungsten on the surface of diamond. Diamond suffers easily from erosion in the environment of high temperature containing oxygen and iron family elements. There is very high energy between the interface of diamond and bonding metal and so the metallurgical bond can’t form at the interface between diamond and bond metal. This will lower greatly the bending strength and the toughness against impact of diamond enhanced tungsten carbide composite button. In order to improve thermal stability of diamond and increase the bonding strength of the interface between diamond and bond metal, to plate tungsten on the surface of diamond by vacuum vapor deposit is adopted. (2) To lower the sintering temperature by adding nickel, phosphorus and boron etc into conventional mixed powder. In general, the sintering temperature of cemented tungsten carbide is more than 1 350 ℃ in which diamond will suffer from serious heat erosion, so the sintering temperature must be lowered. To add nickel, phosphorus and boron etc into cobalt-base bond whose melting point is more than 1 350 ℃ will lower the sintering temperature to about 1 050 ℃. To add phosphorus can lower the temperature of liquid phase occurring and promote the densification of matrix alloy in advance because the co-crystallization temperature of Ni-P and Co-P is 880 ℃ and 1 020 ℃ respectively. The proper adding amount of nickel, phosphorus and boron etc is a key problem. To substitute nickel for partial cobalt can improve the toughness against impact of diamond enhanced tungsten carbide composite button and lower the sintering temperature. To add boron is helpful for sintering and improving the toughness against impact of diamond enhanced tungsten carbide composite button. (3) To increase the sintering press. Under the same sintering temperature, to improve the sintering press can improve the density and strength of sintering products. In this study to increase the sintering press 35 MPa in the usual conditions to 50～60 MPa in sintering diamond enhanced tungsten carbide button by adopting ceramic material as pressing rod has improved the sintering quality effectively. The properties of the button have been measured under lab conditions. The testing results show that its hardness is more than HRA86 and that its abrasiveness resistance is 100 times more than conventional cemented tungsten carbide, and its toughness against impact is more than 100J. All these data theoretically show that the button has very good mechanical properties that can meet the need of percussion drilling, and can solve the problems encountered with button bit of conventional cemented tungsten carbide.

关于美国医疗服务提供方向个人开放健康医疗信息的研究

个人医疗数据的碎片化带来卫生服务效率低下、医疗错误频发和医疗成本增加,在此背景下,美国政府意识到开放健康医疗信息给个人对于解决上述问题的重要价值,采取了一系列措施积极推动医疗服务提供方将患者的个人健康医疗信息开放给患者,强调个人层面的赋能来提高其健康管理的能力,为我国医疗机构向患者开放病历信息提供了很好的借鉴。

An Elevator Button Recognition Method Combining YOLOv5 and OCR

Fast recognition of elevator buttons is a key step for service robots toride elevators automatically. Although there are some studies in this field, noneof them can achieve real-time application due to problems such as recognitionspeed and algorithm complexity. Elevator button recognition is a comprehensiveproblem. Not only does it need to detect the position of multiple buttonsat the same time, but also needs to accurately identify the characters on eachbutton. The latest version 5 of you only look once algorithm (YOLOv5) hasthe fastest reasoning speed and can be used for detecting multiple objects inreal-time. The advantages ofYOLOv5 make it an ideal choice for detecting theposition of multiple buttons in an elevator, but it’s not good at specific wordrecognition. Optical character recognition (OCR) is a well-known techniquefor character recognition. This paper innovatively improved the YOLOv5network, integrated OCR technology, and applied them to the elevator buttonrecognition process. First, we changed the detection scale in the YOLOv5network and only maintained the detection scales of 40 ∗ 40 and 80 ∗ 80, thusimproving the overall object detection speed. Then, we put a modified OCRbranch after the YOLOv5 network to identify the numbers on the buttons.Finally, we verified this method on different datasets and compared it withother typical methods. The results show that the average recall and precisionof this method are 81.2% and 92.4%. Compared with others, the accuracyof this method has reached a very high level, but the recognition speed hasreached 0.056 s, which is far higher than other methods.

Optimization of plasma-processed air(PPA)inactivation of Escherichia coli in button mushrooms for extending the shelf life by response surface methodology

The effect of plasma-processed air(PPA)treatment with different conditions(time,power andflow rate)on the inactivation of Escherichia coli(E.coli)in button mushroom was evaluated.Response surface methodology(RSM)was applied to optimize PPA treatments on the E.coli of button mushrooms.According to the response surface analysis,the optimal treatment parameters were a treatment time of 12 min,treatment power of 90 W and flow rate of 1.2 l min-1.As with verifying tests from the optimization exercise,the number of E.coli reduced by 5.27 log CFU/g at the determined optimum conditions.The scanning electronic microscopy(SEM)micrography showed that the surface of the E.coli was significantly changed under the optimized PPA treatment.Quality parameters of button mushrooms treated at the determined optimum conditions were compared with untreated samples during the storage for 12 d at 4°C?±?1°C.The PPA treatment was found to be effective in inhibiting microbes and preserving postharvest quality in button mushrooms,and these results suggested PPA treatment may provide an alternative for the sterilization of foodborne and maintaining postharvest of fruits and vegetables.

Optimization of Osmotic Drying Parameters for Button Mushroom (<i>Agaricus bisporus</i>)

Response surface methodology was used to investigate the effect of brine concentration (10% - 20%) solution temperature (35℃ - 55℃), and duration of osmosis (30 - 60 min) with respect to water loss (WL) and salt gain (SG). The solu- tion to sample ratio of 5/1 (w/w) was used. The Box-Behnken design of three variables and three levels including seventeen experiments formed by five central points were used for optimizing input parameters. Linear, quadratic and interaction effects of three variables were analyzed with respect to water loss and solid gain. For each response, second order polynomial models were developed using multiple regression analysis. Analysis of variance (ANOVA) was per- formed to check the adequacy and accuracy of the fitted models. The response surfaces and contour maps showing the interaction of process variables were constructed. The optimum operating conditions were: solution temperature 44.89℃, brine concentration of 16.53 per cent and duration of osmosis of 47.59 min. At this optimum point, water loss and salt gain were predicted to be 44.55 per cent and 2.98 percent respectively.

关节镜下Endo—button治疗前交叉韧带胫骨止点撕脱性骨折的疗效研究

目的观察关节镜下Endo—button治疗前交叉韧带胫骨止点撕脱性骨折的疗效。方法本研究共纳入67例前交叉韧带胫骨止点撕脱性骨折患者，将其分为试验组32例和对照组35例。试验组患者均于关节镜下采用Endo—button带袢钢板治疗，对照组35例进行切开内同定。比较两组患者术后1个月膝关节Lyshohn评分。结果试验组患者治疗后膝关节功能评分显著升高，与治疗前比较，差异有统计学意义（P〈0．05）；同时其膝关节功能评分也明显高于同期对照组，差异有统计学意义（P〈0．05）；试验组患者住院时间远远短于对照组，差异有统计学意义（P〈0．05）。结论关节镜下Elido-button治疗前交叉切带胫骨止点撕脱性骨折疗效明显，术后恢复快，能够提高患者膝关节功能、

Energy Efficiency Analysis of White Button Mushroom Producers in Alburz Province of Iran: A Data Envelopment Analysis Approach

The aim of this study was to determine energy consumption pattern and specifically to measure and benchmark the efficiency for white button mushroom production in Alburz province of Iran. The data used in this study were collected by interviewing mushroom producers in the region. In the surveyed farms, average yield and total energy consumption were calculated as around 208.46 kg·ton-1 compost and 133.25 MJ·ton-1, respectively. The results revealed that fossil fuel (40.43%), compost (30.45%) and electricity (27.42%) consumed the bulk of energy. The results of DEA approach also showed that 12 and 14 farmers had efficiency score of unity. Electricity and fossil fuel were found to be used in excess in target mushroom production farms. Moreover, we came to the conclusion that the total energy consumption can be reduced to 120.15 MJ·ton-1 for mushroom production in which diesel fuel energy (50.89 MJ·ton-1), FYM (37.32 MJ·ton-1) and electricity (30.34 MJ·ton-1) energies were considerably significant.

怎样用Excel批量打印奖状

就奖状、荣誉证书的打印而言,传统方法是：用Word制作出一个模版,再将头衔、落款、获奖内容编排好,而只将姓名这一位置留空,即填一个打一张。这种方法有如下不便：一是打印效率低下。如需要不断地输入姓名,改变字体、字号,再进行打印;打完一类奖项后,若要继续打印,则需要更改获奖名称。二是当工作量较大时,难免会出错。