Effect of titanium on the sticking of pellets based on hydrogen metallurgy shaft furnace:Behavior analysis and mechanism evolution

Direct reduction based on hydrogen metallurgical gas-based shaft furnace is a promising technology for the efficient and low-carbon smelting of vanadium-titanium magnetite.However,in this process,the sticking of pellets occurs due to the aggregation of metal-lic iron between the contact surfaces of adjacent pellets and has a serious negative effect on the continuous operation.This paper presents a detailed experimental study of the effect of TiO2 on the sticking behavior of pellets during direct reduction under different conditions.Results showed that the sticking index(SI)decreased linearly with the increasing TiO2 addition.This phenomenon can be attributed to the increase in unreduced FeTiO3 during reduction,leading to a decrease in the number and strength of metallic iron interconnections at the sticking interface.When the TiO2 addition amount was raised from 0 to 15wt%at 1100°C,the SI also increased from 0.71%to 59.91%.The connection of the slag phase could be attributed to the sticking at a low reduction temperature,corresponding to the low sticking strength.Moreover,the interconnection of metallic iron became the dominant factor,and the SI increased sharply with the increase in re-duction temperature.TiO2 had a greater effect on SI at a high reduction temperature than at a low reduction temperature.

Assessment of Knowledge, Attitude and Practices among Healthcare Workers in a Tertiary Care Hospital on Needle Stick Injury

Purpose: Needle-stick injury (NSI) is one of the most potential occupational hazards for healthcare workers because of the transmission of blood-borne pathogens. As per recent data, around 30 lakh healthcare workers sustain Needle stick injuries each year. This study was conducted to assess healthcare workers’ knowledge, attitude and practices regarding needle stick injury. Materials & Methods: A cross-sectional study was conducted in a Tertiary Care Hospital over the period of 3 months. The study population consisted of Intern Doctors, Post Graduate resident Doctors, Staff Nurses, laboratory technicians of Government Medical College and New Civil Hospital, Surat (n = 300). The data were collected using a self-administered questionnaire via the means of Google Forms. Questionnaire was made with prior review literature. The data obtained were entered and analysed in Microsoft Excel. Results: The prevalence of NSI in our study was 46%, with a higher prevalence among the PG residents (72%). Overall scores regarding knowledge and attitude were better in PG residents (knowledge score > 7 in 71% and Attitude Score > 7 in 68% of PG Residents). Even though the PG residents scored highest in the knowledge category, the majority of them suffered needle stick injuries as a result of poor practice scores. Among those who had NSI (n = 139/300), 70% of study participants had superficial injuries, only 9% reported the incident, 18% got medical attention within 2 hours of the incident, and 7% followed up to recheck their viral markers status. Most incidents of NSI were due to hypodermic needles while recapping needles. Conclusion: Exposure to needle stick injuries and their underreporting remains a common problem. It is imperative that healthcare workers receive regular training on the proper handling of sharp objects. We can also draw the conclusion that preventing NSIs requires putting knowledge into practice.

Effect of Mouth Opening Training Stick Combined with Oral Massage on Mouth Opening Difficulty in Head and Neck Cancer Patients after Treatment

Objective: To study the application effect of mouth-opening training sticks combined with oral massage on patients with mouth-opening difficulty after treatment for head and neck cancer. Methods: Using convenient sampling, 60 patients with mouth-opening difficulty after treatment for head and neck cancer admitted to the Oncology Department from February 2022 to October 2023 were selected for a 2-week exercise and nursing program. The patients were divided into a control group (February 1, 2022 to November 30, 2022) and an observation group (December 1, 2022 to October 31, 2023), with 30 patients in each group. The control group underwent routine mouth-opening functional exercises combined with cork for oral support training, while the observation group underwent routine mouth-opening functional exercises combined with oral massage and mouth-opening training sticks for oral support training. The mouth-opening degree, mouth-opening difficulty level, comfort level, compliance, and quality of life were observed in both groups. Results: Before the intervention, there were no statistically significant differences in mouth-opening degree and mouth-opening difficulty level between the two groups (P > 0.05). After the intervention, the mouth-opening degree, mouth-opening difficulty level, oral comfort level, compliance, and QLICP-HN scores in the observation group were all better than those in the control group, with statistically significant differences (P < 0.05). Conclusion: The combination of mouth-opening training sticks and oral massage with mouth-opening functional exercises can effectively improve the degree of mouth-opening difficulty, enhance oral comfort, increase compliance with mouth-opening exercises, and improve quality of life.

Prevalence of Occupational Injury and Knowledge of Post-Exposure Prophylaxis Accessibility among Healthcare Workers in Mogadishu, Somalia

Introduction: Healthcare workers in Mogadishu, Somalia face significant occupational injury risks, particularly needle stick injuries, with 61.1% reporting incidents. This poses a serious threat to their health, leading to infections such as hepatitis B, hepatitis C, and HIV. Despite the high prevalence of injuries, awareness of Post-Exposure Prophylaxis (PEP) accessibility is relatively high, with 84.0% of respondents aware of it. However, there are gaps in knowledge and implementation, as evidenced by variations in availability of PEP. Improving workplace safety measures, providing comprehensive training on injury prevention and PEP protocols, and ensuring consistent availability of PEP in healthcare facilities are crucial steps to safeguard the well-being of healthcare workers in Mogadishu, Somalia. Methods: A cross-sectional study was conducted among hospital workers in Mogadishu, Somalia, focusing on professionals from various healthcare facilities. The study targeted nurses, doctors, laboratory personnel, and pharmacists. Purposive sampling was employed, resulting in a sample size of 383 calculated using Fisher’s sample size formula. Data were collected using coded questionnaires entered into Microsoft Excel 2019 and analyzed with SPSS software to generate frequencies and proportions, presented through frequency tables and pie figures. Results: The study in Mogadishu, Somalia, examined the prevalence of occupational injuries and knowledge of Post-Exposure Prophylaxis (PEP) accessibility among healthcare workers. Findings indicate a high prevalence of injuries, with 61.1% reporting incidents, predominantly needle stick injuries (60.6%). Despite the majority seeking prompt medical attention (72.0%), work-related illnesses affected 53.2% of respondents, notably work-related stress (59.5%). While most received training on injury and illness prevention (68.9%), gaps exist in PEP awareness, with 16.0% unaware of it. Nonetheless, 84.0% were aware, predominantly through health facilities (52.0%). Availability of PEP was reported by 71.3% in healthcare facilities, with variations in shift availability. The majority reported guidelines for PEP use (55.7%). Efforts are needed to bolster PEP awareness and ensure consistent availability in healthcare facilities to safeguard worker health. Conclusion: High prevalence of occupational injuries among healthcare workers, with needle stick injuries being the most common (60.6%). Despite this, 84.0% of respondents were aware of Post-Exposure Prophylaxis (PEP), primarily learning about it from health facilities (52.0%). While 71.3% reported the availability of PEP in their facility, 28.7% noted its unavailability. These results emphasize the need for improved education and accessibility of PEP to mitigate occupational injury risks.

探索中国美食之旅

1 When I was about to go to China,I was so fasci⁃nated that I completely forgot about the food I would be eating during my stay.It wasnt until my Chinese friend brought out chopsticks and told me to practise using them that I realized how difficult it was.My friend laughed,but I had so many questions in my mind.Why dont the Chinese have proper cutlery(餐具)?I had never seen Chinese people using spoons in movies,only chopsticks.I mentally prepared myself for the chopstick journey ahead.

Eating Hot Pot

Hot pot is a popular Chinese dish.It is delicious!You sit at a table with a pot of hot broth.First,the broth has to boil.Then you can cook many different things in it.Many people put seafood and different kinds of meat in hot pot.Vegetables such as cabbage and corn are delicious in it,too.People also add mushrooms,tofu and noodles to hot pot.Take some cooked food from your hot pot with your chopsticks.Dip it in some sauce and enjoy!

Friction heat production and atom diffusion behaviors during Mg-Ti rotating friction welding process

An innovative physical simulation apparatus, including high speed camera, red thermal imaging system, and mechanical quantity sensor, was used to investigate the friction heat generation and atom diffusion behavior during Mg-Ti friction welding process. The results show that the friction coefficient mainly experiences two steady stages. The first steady stage corresponds to the Coulomb friction with material abrasion. The second steady stage corresponds to the stick friction with fully plastic flow. Moreover, the increasing rates of axial displacement, temperature and friction coefficient are obviously enhanced with the increase of rotation speed and axial pressure. It can also be found that the there exists rapid diffusion phenomenon in the Mg-Ti friction welding system. The large deformation activated diffusion coefficient is about 105 higher than that activated by thermal.

帕金森病与血管性帕金森综合征嗅觉功能改变的研究

目的研究帕金森病(PD)与血管性帕金森综合征(VP)的嗅觉功能改变及其影响因素,探讨Sniffin’Sticks方法(SST)嗅觉功能检查在PD诊断和鉴别诊断中的应用价值。方法选取2015年3~12月在南通大学第二附属医院就诊的PD、VP患者及性别、年龄匹配的同期体检正常对照者(HC组)各40例。采用SST检查方法分别评价PD、VP、HC三组受检者的嗅觉阈值(OT)、嗅觉辨别阈值(OD)、嗅觉识别阈值(OI)及三项得分之和(TDI)总分,比较三组受检者间嗅觉功能的差异,并评估其嗅觉功能与年龄、性别、简易精神状态量表(MMSE)、病程、H-Y分级、统一帕金森病评定量表(UPDRS-Ⅲ)等变量的相关性。应用受试者工作特征曲线(ROC)评价TDI在PD诊断中的价值。结果 PD、VP、HC三组受检者间基线资料比较差异均无统计学意义(P>0.05);PD组嗅觉障碍发生率为92.5%,显著高于VP组(37.5%)及HC组(35.0%),差异有统计学意义(P<0.05);PD、VP、HC三组受检者的TDI总分分别为(20.07±4.45)分、(30.53±5.90)分和(31.00±4.99)分,PD组TDI总分明显低于HC组和VP组(P<0.05),而VP组与HC组间比较差异无统计学意义(P>0.05);HC组TDI总分与年龄呈负相关(r=-0.987,P<0.05),与MMSE呈正相关(r=0.866,P<0.05);PD组TDI总分与病程呈负相关(r=-0.484,P<0.05),与MMSE呈正相关(r=0.618,P<0.05),与性别、年龄、H-Y分级及UPDRS-Ⅲ评分无关;VP组TDI总分与年龄、病程、H-Y分级均呈负相关(分别为r=-0.989,P<0.05;r=-0.770,P<0.05;r=-0.353,P<0.05),与MMSE呈正相关(r=0.838,P<0.05),与性别、UPDRS-Ⅲ评分无关;区分PD组和HC组时TDI总分曲线下面积(AUC)为0.944,临界值为23.313,灵敏度为82.5%,特异度为97.5%;区分PD组和VP组时,TDI总分AUC为0.911,临界值为23.563,灵敏度为87.5%,特异度为82.5%。结论 SST嗅觉检测方法临床应用简单、结果可靠、可操作性强;PD存在较为显著的嗅觉障碍,VP嗅觉功能与HC比较无显著差异;使用SST能够为PD的诊断和鉴别诊断提供重要的参考信息。

基于改进GAC模型的二值水平集前列腺超声图像自动分割算法

提出了一种基于改进测地线主动轮廓(geodesic active contour,GAC)的自动分割算法.首先通过结合径向浅浮槽和区域填充算法得到滤波后图像的大致轮廓,然后通过构造基于区域信息的符号压力函数代替边界停止函数,并且加入了基于边界梯度信息的能量项,有效地克服了弱边界的问题.该模型用二值水平集方法实现,使算法的稳定性更高,计算量大大降低.对前列腺直肠超声图像的实验结果表明:本算法迭代收敛速度快,有效避免了边界泄露问题.

一种基于水平集的前列腺超声图像A动分割算法

由于超声图像存在着斑点噪声和较低的信噪比，使得传统的分割算法很难应用于超声图像的自动分割，而手工分割方法非常耗时且重复性差。因此提出了一种基于水平集和改进径向浅浮槽算法（RBR，radical bas—relief）的前列腺直肠超声（TRUS）图像全自动分割算法。首先使用Sticks滤波器来去除斑点噪声，并且增强图像的对比度。然后使用径向浅浮槽算法来对图像进一步增强，通过使用形态学算法和边界填充得到前列腺的初始轮廓，使用该轮廓来初始化水平集算法，从而实现全自动分割。实验结果表明，该方法能有效地去除斑点噪声的影响，并且能够对前列腺超声图像实现较好的分割效果。

STUDY ON SLAG DETACHABILITY AND STICK SLAG MECHANISM OF SSFCE

In the paper, the effects of linear expansion coefficient and basic index of melting slag on the detachability of self shielded flux cored electrode (SSFCE) are investigated. An equation is obtained on the principles of ceramics and mineralography which predict the detachability of basic SSFCE. In addition, stick slag mechanism of SSFCE is analyzed.

基于视觉导航的小型搬运机器人控制系统设计

为模拟自动化物流系统的作业流程,设计了一种基于Compute Stick的小型视觉导航搬运机器人控制系统﹒整个系统可分为视觉系统和驱动控制系统两个部分﹒视觉系统由Compute Stick电脑棒和摄像头组成,利用Open CV视觉库来完成目标的图像采集、处理与分析,实现循迹、颜色识别和特征点识别,并将分析结果通过串口传送给驱动控制系统;驱动控制系统由STM32单片机和360°舵机组成,根据视觉处理结果,由STM32单片机输出PWM脉宽控制舵机旋转的角度和速度,从而控制机器人移动﹒实验和竞赛表明该机器人系统稳定可靠,具有广泛的应用前景﹒

供需中的Hockey-stick现象分析及对策研究

许多公司的产品需求在连续而固定的周期会出现前低后高,即 Hockey-stick 现象,这种现象普遍存在于供应链之中并困扰着许多的企业管理者.不认为其产生的原因是公司对销售人员的周期性考评的传统观点,并以快速消费品行业为背景,通过建立模型,得出了这种现象主要是公司普遍采用的总量折扣(Volume Discounts)价格政策导致的结论,并提出了公司可以通过多产品组合定价等方法缓和这个问题,最后通过一个实例证实了文章的观点.

嗅觉主观评价方法临床应用分析

目的:比较嗅觉测试方法中的四种主观评价方法的临床稳定性及一致性。方法:选择40例门诊患者,进行嗅觉测试,并对结果进行对比分析。测试方法有简单测试法、UPSIT、Sniffin Sticks测试、T&T嗅觉计定量检查法等四种。结果:四种测试方法的稳定性对比达到了85%,并且UPSIT测试还可以鉴别伪嗅障。结论:嗅觉的这四种主观评价方法是可靠的、稳定的。

可塑性纤维桩核与预成玻璃纤维桩核黏结强度的研究

目的:分别研究可塑性纤维桩(Ever Stick纤维桩)与预成玻璃纤维桩在光固化树脂粘结剂(GC G-BOND-富士第七代一步法自酸蚀复合树脂黏结剂)和玻璃离子黏固剂(GC FUJI I-富士I型玻璃离子黏固剂)下黏结力的大小并进行比较。为临床医生与患者选择纤维桩和黏结剂修复患牙提供参考依据。方法:将16颗完整离体单根牙截冠,采用逐步后退法预备根管。将两种桩分别用两种黏结剂黏固于离体牙根管内。A组:Ever Stick纤维桩+GC-BOND自酸蚀光固化树脂粘结剂、B组:预成玻璃纤维桩+GC-BOND自酸蚀光固化树脂粘结剂、C组:Ever Stick纤维桩+GC-Fuji I型玻璃离子粘固剂、D组:预成玻璃纤维桩+GC-Fuji I型玻璃离子黏固剂。用万能实验机进行微推出实验,用体式显微镜观察断裂方式,比较这四组组合黏结力的大小并进行统计学分析。结果:GC G-BOND自酸蚀光固化树脂粘结剂对纤维桩的固位力明显强于GC-Fuji I型玻璃离子黏固剂。GC G-BOND自酸蚀光固化树脂粘结剂对Ever Stick纤维桩的黏结力强于预成玻璃纤维桩。GC-Fuji I型玻璃离子水门汀粘固剂对两种桩核黏结力相似。结论:纤维桩修复时,树脂黏结剂是黏结材料的首选,树脂黏结剂对可塑性纤维桩的固位效果强于预成玻璃纤维桩。

Effects of Plant Spacing and Finger Sticking Area Settings for Machine Transplanting on Yield of Double-season Early Rice

The effects of rice transplanters＇ transplanting settings（plant spacing and finger sticking area） on rice yield were investigated in two early-season rice cultivars：hybrid rice cultivar（Zhuliangyou 819） and conventional rice cultivar（Zhongjiazao 17）.The results showed that,different transplanting settings resulted in different numbers of transplanted basic seedlings,and the rice yield was significantly correlated with the number of transplanted basic seedlings.The number of transplanted basic seedlings increased with the decrease of plant spacing and the increase of finger sticking area.The rate of lost hills of machine transplanting decreased with the increase of finger sticking area.The leaf area index and amount of dry matter accumulation were highly correlated with the number of transplanted basic seedlings.The average yield of the rice transplanted with a plant spacing of11.5 cm was higher than that with a plant spacing of 13.8 cm.In the field transplanted with the rice under the plant spacing of 13.8 cm,the rice yield increased with the increase of finger sticking area,and the finger sticking area of 2.23 cm2 showed the highest rice yield of 8 174.16 kg/hm2 of Zhuliangyou 819 and 7 925.54kg/hm2 of Zhongjiaozao17.In the field transplanted with the rice under the plant spacing of 11.5 cm,the rice yield was the highest with the finger sticking area of 1.83 cm2,and then decreased with the large finger sticking area.Under the plant spacing of 11.5 cm,the highest rice yields of Zhuliangyou 819 and Zhongjiaozao17 were 8 492.94 kg/hm2 and 8 000.23 kg/hm2,respectively.Therefore,the preferred machine transplanting settings for double-season early rice are a plant spacing of11.5 cm and a finger sticking area of 1.83 cm2,while the finger sticking area should be increased to 2.23 cm2 for conventional rice cultivars.

Hockey-stick现象与企业物流绩效关联的实例分析

Hockey-stick现象普遍存在于供应链之中并对企业的生产和物流运作极为不利。通过对某国际著名食品公司在大陆某生产厂的深入调研、数据收集和分析,验证了Hockey-stick现象对需求波动以及需求波动对企业物流绩效的影响。

咽喉反流对嗅觉功能的影响

目的研究咽喉反流(LPR)对嗅觉功能的影响。方法选取我院2017年1月~2018年5月门诊确诊的LPR患者50例作为LPR组,选取年龄、性别构成比相匹配的无吸烟、饮酒史健康志愿者50例作为对照组。所有入选者均行嗅觉功能测试、RSI和RFS量表评分、鼻内镜检查及Lund-Kennedy评分。对比2组患者的嗅觉功能和Lund-Kennedy评分,分析LPR患者RSI和RFS量表评分、鼻内镜下Lund-Kennedy评分与嗅觉功能的相关性。结果Sniffin’Sticks试验3项测试中,LPR组的气味阈值得分、气味辨别得分、气味识别得分和嗅觉总分(TDI)均低于健康对照组(P值均<0.05)。LPR患者症状中,痰多或涕后流评分与Sniffin’Sticks试验中的气味阈值、气味识别、TDI值呈负相关(P值均<0.05);反酸、胃灼热评分与气味阈值、气味辨别、TDI值呈负相关(P值均<0.05)。LPR患者体征中,喉水肿评分与TDI值呈负相关(P<0.05);喉黏膜增厚评分与气味阈值、TDI值呈负相关(P值均<0.05)。LPR组Lund-Kennedy评分高于对照组(P<0.05),Lund-Kennedy评分与嗅觉评分TDI值呈负相关(P<0.05)。结论LPR可导致患者嗅觉功能降低,在气味阈值、气味辨别、气味识别上均低于同龄正常人群。

APPLICATION OF 2-D MOIRE INTERFEROMETRYOF STICKING FILM IN HUMAN TIBIA MEASUREMENT

This paper makes use of the method of testing and measuring the human body tibia by using2-D moire interferometry of sticking film. hased on the J'--y direction moire patterns recorded synchronously by 2-D optical path,the elastic constant,strain and displacement of the tibia are measured.Compared with the electric measuring method the error is samll and the sensitivity is high.

Nature:粘滑运动和岩浆摩擦熔融导致的击鼓式火山地震

2014年5月4日,Nature发表了一篇题名为＂粘滑运动和岩浆摩擦熔融导致的击鼓式火山地震＂（Volcanic drumbeat seismicity caused by stick-slip motion and magmatic frictional melting）的文章。文章指出,火山喷发后,凝固的岩浆会在火山顶部形成圆顶。