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.

An Artificial Intelligence Algorithm for the Real-Time Early Detection of Sticking Phenomena in Horizontal Shale Gas Wells

Sticking is the most serious cause of failure in complex drilling operations.In the present work a novel“early warning”method based on an artificial intelligence algorithm is proposed to overcome some of the known pro-blems associated with existing sticking-identification technologies.The method is tested against a practical case study(Southern Sichuan shale gas drilling operations).It is shown that the twelve sets of sticking fault diagnostic results obtained from a simulation are all consistent with the actual downhole state;furthermore,the results from four groups of verification samples are also consistent with the actual downhole state.This shows that the pro-posed training-based model can effectively be applied to practical situations.

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.

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.

Test research on sticking mechanism during hot rolling of SUS 430 ferritic stainless steel

The sticking phenomenon during hot rolling of SUS 430 ferritic stainless steel was investigated by means of a two-disc type high-temperature wear tester. The test results indicate that sticking particles on the surfaces of high chromium steel （HiCr） and high-speed steel （HSS） rolls undergo nucleation, growth, and saturation stages. Grooves on the roll surface generated by grinding provide nucleation sites for sticking particles. The number of sticking particles on the HiCr roll surface is greater than that on the HSS roll surface. The average surface roughnesses （Ra） of HiCr and HSS rolls change from 0.502 and 0.493 μm at the initial stage to 0.837 and 0.530 μm at the saturation stage, respectively. The test further proves that the sticking behavior is strongly dependent on roll materials, and the HSS roll is more benefi- cial to prevent particles sticking compared with the HiCr roll under the same hot-rolling conditions.

A New Method for Predicting Wall Sticking Occurrence Temperature of High Water Cut Crude Oil

In crude oil transportation, adhesion of oil on pipe wall can cause partial or total blockage of the pipe. This process is significantly affected by wall sticking occurrence temperature(WSOT). In this work, an efficient approach for estimating WSOT of high water-cut oil, which can agree well with the actual environment of multiphase transportation pipeline, is proposed. Based on the energy dissipation theory, it is possible to make comparison of average shear rates between the stirred vessel and the flow loop. The impacts of water content and shear rate on WSOT are investigated using the stirred vessel and the flow loop. Good agreement has been observed between the stirred vessel and the flow loop results with the maximum and the average absolute deviations equating to 3.30 °C and 2.18 °C, respectively. The development of gathering scheme can enjoy some benefits from this method.

Influence of Oil and Water Components on Wall-sticking Occurrence Temperature in High Water-cut Crude Oil Pipeline

To study the wall-sticking phenomenon and prevent pipeline blockage accidents,two analytical methods are used to evaluate the influence of different crude oil components on the wall-sticking occurrence temperature(WSOT).The WSOT and the interactions among oil,water,and surface solids are measured and calculated by various devices under different values of the wax content,water pH,and salinity.The results show that there is greater correlation between the wax content and WSOT than between resins/asphaltenes and WSOT.Furthermore,the wax content,water pH,and salinity have different effects on WSOT.There is generally a positive correlation between wax content and WSOT,whereas the maximum WSOT occurs when the water pH is in the range 5.7–6.5,and decreases under more acidic or alkaline conditions.As the salinity increases,WSOT decreases slightly,but quickly becomes saturated.In terms of interactions,variations in the interfacial tension and adhesion work with pH and salinity are consistent with that of WSOT,while the contact angle exhibits the opposite relation.

Operational procedures of auricular point sticking technology

As an external treatment technique of traditional Chinese medicine(TCM),auricular point sticking,which is rooted in holographic biology theory and TCM viscera and meridian theory,is a safe and effective treatment method.This article introduces the technology overview and development process.The auricular point sticking technique for constipation is taken as an example to specify the basic requirements,assessment,operational points,acupoint selection and matters needing attention during the implementation of the auricular acupressure technique,providing a reference for the operating procedures of this technique in the clinical treatment of other diseases such as insomnia,diarrhea,colds,hypertension,headache,and dysmenorrhea.

Numerical Simulation and Prediction for Sticking Type Breakout Behavior in Slab Contiuous Casting

A two-dimensional heat transfer model was developed to calculate the mould wall temperature field under normal operations condition and to determine its changing behavior when breakout occured. On the numerical simulation of sticking type breakout process and the breakout related wall temperature evolution, parameters of prediction were suggested.

Clinical Effect of Auricular Point Sticking in Patients with Lung Cancer Receiving Chemotherapy

Objective:To discuss and analyze the clinical effect of auricular point sticking in lung cancer chemotherapy.Methods:Sixty-two patients with lung cancer treated with chemotherapy in Suqian Traditional Chinese Medicine Hospital of Jiangxi Province were selected for case evaluation and analysis.The time span of the research was from June 2020 to June 2021.The patients were divided into two groups:a study group(n=31)and a control group(n=31)based on their medical record numbers.All the patients were treated with conventional western medicine before and after chemotherapy to prevent adverse reactions;however,the patients in the study group were also treated with auricular point sticking in addition to the fonner.The relevant indexes of the two groups were compared.Results:The incidence of adverse reactions was significantly lower in the study group compared to the control group(P<0.05);the rate of symptomatic relief of the patients in the study group was higher than that of the control group(P<0.05);the stress response indexes toward chemotherapy of the study group were better than those of the control group(P<0.05)・Conclusion:Auricular point sticking for patients with lung cancer who are receiving chemotherapy can reduce the incidence of adverse reactions,alleviate clinical symptoms,such as chest distress,asthma,and poor appetite,significantly alleviate stress response caused by chemotherapy,as well as promote the treatment effect;thus,it is worthy of promotion.

闭合复位内固定联合joy stick操纵杆技术治疗儿童难复性肱骨髁上骨折效果观察

目的观察闭合复位内固定联合joy stick操纵杆技术治疗儿童难复性肱骨髁上骨折的临床效果。方法选择因“肘关节外伤后肿痛伴活动受限”入院患儿4例,均诊断为GartlandⅢ型肱骨髁上骨折,均采用闭合复位内固定联合joy stick操纵杆技术治疗。结果4例患儿均获得满意复位,无一例转为切开复位,平均手术时间66 min,住院时间均<5 d。出院后规律复查换药,1月后均恢复良好,骨折线对位满意,未出现感染等短期并发症,拔除克氏针。结论Joy stick操纵杆技术不仅可以更加准确地控制肱骨轴的旋转,还能更快地获得复位和维持复位,进针顺利,手术时间短,减少转为切开复位,降低手术难度,且未增加围手术期并发症。

Modeling and simulation of solvent behavior and temperature distribution within long stick propellants with large web thickness undergoing drying

Drying is a complicated physical process which involves simultaneous heat and mass transfer in the removal of solvents inside propellants.Inappropriate drying techniques may result in the formation of a hard skin layer near the surface to block the free access of most solvent through for long stick propellants with large web thickness,which lead to lower drying efficiency and worse drying quality.This study aims to gain a comprehensive understanding of drying process and clarify the mechanism of the blocked layer near the propellant surface.A new three-dimensional coupled heat and mass transfer(3D-CHMT)model was successfully developed under transient conditions.The drying experiment results show that the 3DCHMT model could be applied to describe the drying process well since the relative error of the content of solvent between simulation and experiment values is only 5.5%.The solvent behavior simulation demonstrates that the mass transfer process can be divided into super-fast(SF)and subsequent minorfast(MF)stages,and the SF stage is vital to the prevention of the blocked layer against the free access for solvent molecules inside propellant grains.The effective solvent diffusion coefficient(Deff)of the propellant surface initially increases from 3.4×10^(-6)to 5.3×10^(-6)m^(2)/s as the temperature increases,and then decreases to 4.1×10^(-8)m^(2)/s at 60-100 min.The value of Deffof surface between 0-1.4 mm has a unique trend of change compared with other regions,and it is much lower than that of the internal at100 min under simulation conditions.Meanwhile,the temperature of the propellant surface increases rapidly at the SF stage(0-100 min)and then very slowly thereafter.Both the evolution of Deffand temperature distribution demonstrate that the blocked layer near the propellant surface has been formed in the time period of approximately 0-100 min and its thickness is about 1.4 mm.To mitigate the formation of blocked layer and improve its drying quality of finial propellant products effectively,it should be initially dried at lower drying temperature(30-40℃)in 0-100 min and then dried at higher drying temperature(50-60℃)to reduce drying time for later drying process in double base gun propellants.The present results can provide theoretical guidance for drying process and optimization of drying parameters for long stick propellants with large web thickness.

Analysis of a Strong-Inhibition Polyamine Drilling Fluid

Drilling technologies based on oil-based drillingfluids and strong inhibitory saltwaterfluids are affected by draw-backs such as downhole accidents where sticking and wellbore instabilities occur.Existing polyamine drillingfluids also exhibit problems such as easy decomposition and poor inhibition performances.In order to mitigate these issues,additives can be used,such as polyamine inhibitors and the synthesis of nanometerfiltrate reducers.Tests conducted in the frame of this study with a polyamine drillingfluid and such additives show that thisfluid has the same inhibitory,plugging,lubricating,and wellbore-stability performances as oil-based drillingfluids.However,it has long-term anti-wear performances even better than those of oil-based drillingfluids.The out-comes of a series of comparisons with other sample cases(other wells)are reported and the advantages related to the proposedfluid discussed in detail.

Meta-analysis of the acupoint application therapy for stable chronic obstructive pulmonary disease

Objective:To systematically evaluate the clinical efficacy and safety of acupoint application in the treatment of stable chronic obstructive pulmonary disease.Methods:A comprehensive search of domestic and international databases,the search time is limited to nearly ten years,collecting traditional Chinese medicine acupoint application in the treatment of chronic obstructive pulmonary disease in stable phase of randomized controlled trials.Literature screening,information extraction and literature quality evaluation were carried out independently by two researchers,and Meta analysis was carried out by Revman software.Results:A total of 42 RCTs with a total of 4192 patients were included.The results of Meta analysis showed that:Compared with the routine treatment of western medicine,the addition of acupoint application therapy can significantly increase the effective rate[RR=1.23,95%CI(1.19,1.27),P<0.00001]and FEV1/FVC[MD=4.46,95%CI(3.17,5.76),P<0.00001].Significantly improved BODE index[MD=-0.63,95%CI(-0.87,-0.40),P<0.00001],SGRQ score[MD=-6.77,95%CI(-9.81,-3.72),P<0.00001],CAT score[MD=-3.33,95%CI(-3.87,-2.79),P<0.00001]and TCM syndrome integral[MD=-3.51,95%CI(-3.96,-3.06),P<0.00001].The differences is statistically significant and the safety profile is good.Conclusion:On the basis of routine treatment of COPD western medicine,acupoint application therapy can significantly improve the clinical symptoms of patients with less adverse reactions.However,due to the limitations of the research,high-quality research is still needed to provide further evidence.

Description of Four New Species for the Genus Damasippus Stål, 1875 (Phasmida: Prisopodidae)

During the review and identification of specimens of the genus Damasippus Stål, 1875 deposited in the National Museum of Costa Rica, some specimens were found that corresponded to four non-described species: D. sepia n.sp., D. viridicorpus n.sp, D. duoviridis n.sp and D. viridilabrum n. sp. Due to the above, a review of the literature describing the species of this group was carried out, with which an illustrated dichotomous key was developed to identify the 16 species, in addition to a partial phylogenetic analysis to corroborate that they do not correspond to the species D. fuscipes, due to its morphological similarity.

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。

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.