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An Affordable and Easily Accessible Approach for Acrylonitrile Monomer Purification through a Simple Column Technique
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作者 Rawdah Whba Mohd Sukor Su’ait Azizan Ahmad 《Journal of Materials Science and Chemical Engineering》 2024年第4期18-28,共11页
This manuscript presents a dataset detailing a method for purifying monomers. Purification plays a crucial role in every chemical process, as it leads to an improvement in product quality through the removal of impuri... This manuscript presents a dataset detailing a method for purifying monomers. Purification plays a crucial role in every chemical process, as it leads to an improvement in product quality through the removal of impurities. The primary method for monomer purification, like acrylonitrile (AN), is the distillation technique. However, this technique is unsafe and hard to set up or handle. A straightforward, risk-free, low-cost method like the column technique resolves these issues. A simple column technique demonstrated the successful execution of purifying AN. Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR) analyses confirmed that AN was successfully purified, with purity reaching 99.8%. FTIR spectra revealed changes in the position and intensity of the stretching vibration peaks after purification. Also, the functional groups of the inhibitor monomethyl ether of hydroquinone (MeHQ) were undetected after purification. Furthermore, after purification, NMR spectra revealed the absence of aromatic protons and carbons associated with MeHQ. In conclusion, the column technique is a successful and inexpensive way to purify AN monomers. This makes it useful for a wide range of applications, especially in polymerization reactions where MeHQ needs to be removed to prevent self-polymerization during the initiation process. 展开更多
关键词 Liquid Monomers ACRYLONITRILE PURIFICATION Inhibitor simple Column
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Simple and effective method for treating severe adult skeletal class II malocclusion: A case report
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作者 Li-Li Xie Dan-Yang Chu Xiao-Feng Wu 《World Journal of Orthopedics》 2024年第10期965-972,共8页
BACKGROUND Severe skeletal class II malocclusion is the indication for combined orthodontic and orthognathic treatment.CASE SUMMARY A woman with a chief complaint of a protruding chin and an inability to close her lip... BACKGROUND Severe skeletal class II malocclusion is the indication for combined orthodontic and orthognathic treatment.CASE SUMMARY A woman with a chief complaint of a protruding chin and an inability to close her lips requested orthodontic camouflage.The treatment plan consisted of extracting the right upper third molar,right lower third molar,left lower second molar,and left upper third molar and moving the maxillary dentition distally using a convenient method involving microimplant nail anchors,push springs,long arm traction hooks,and elastic traction chains.After 52 months of treatment,her overbite and overjet were normal,and her facial profile was favorable.CONCLUSION This method can be used for distal movement of the maxillary dentition and to correct severe skeletal class II malocclusion in adults. 展开更多
关键词 Skeletal class II malocclusion Maxillary dentition Microimplant nail simple and effective method Case report
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Heat Kernel Estimates on Simple Random Walks and On-Diagonal Upper Bounds
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作者 Runquan Zuo Yuxiao Yan +2 位作者 Zishan Zhu Liwen Yao Qihao Han 《Journal of Applied Mathematics and Physics》 2024年第10期3613-3625,共13页
We primarily provide several estimates for the heat kernel defined on the 2-dimensional simple random walk. Additionally, we offer an estimate for the heat kernel on high-dimensional random walks, demonstrating that t... We primarily provide several estimates for the heat kernel defined on the 2-dimensional simple random walk. Additionally, we offer an estimate for the heat kernel on high-dimensional random walks, demonstrating that the heat kernel in higher dimensions converges rapidly. We also compute the constants involved in the estimate for the 1-dimensional heat kernel. Furthermore, we discuss the general case of on-diagonal estimates for the heat kernel. 展开更多
关键词 Heat Kernel simple Random Walk On-Diagonal Estimate
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Effectiveness of Low-Temperature Plasma Adenoidectomy Combined with Bilateral Tonsillectomy in the Treatment of Snoring in Children and Its Effect on Sleep Quality
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作者 Huanfa Yan Jiping Yan +2 位作者 Qingmin Li Chunfang Gu Jianxu Liu 《Journal of Clinical and Nursing Research》 2024年第5期255-259,共5页
Objective:To evaluate the therapeutic effect of low-temperature plasma adenoidectomy(abbreviation:adenoid low-temperature plasma excision)coupled with tonsillectomy(bilateral)on snoring in children.Methods:Seventy-six... Objective:To evaluate the therapeutic effect of low-temperature plasma adenoidectomy(abbreviation:adenoid low-temperature plasma excision)coupled with tonsillectomy(bilateral)on snoring in children.Methods:Seventy-six cases of snoring children treated in the hospital between November 2020 and November 2023 were selected.38 cases of children in Group A agreed to surgery and were admitted to the hospital for surgical treatment and were treated with adenoid cryo-plasma excision combined with tonsillectomy(bilaterally),and 38 cases of children in Group B did not agree to outpatient conservative treatment for surgery,and the results of the treatment were compared.Results:Before treatment,there was no difference between the ventilation function indexes,sleep quality scores,and quality of life scores of the two groups compared with each other(P>0.05).After treatment,the ventilation function indexes of Group A were better than Group B,and the sleep quality score and quality of life score were higher than that of Group B.The total effective rate of Group A was higher than that of Group B(P<0.05).Conclusion:Adenoid cryo-plasma excision combined with tonsillectomy(bilateral)can improve the quality of life,ventilation function,and sleep quality of children with snoring,and can enhance the efficacy. 展开更多
关键词 Cryo-plasma adenoidectomy Bilateral tonsillectomy Children snoring Sleep quality
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Life′s Simple 7干预减轻Her⁃2阳性乳腺癌患者化疗相关心血管系统损害的研究 被引量:2
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作者 吴军 崔伟燕 +2 位作者 李平 张青凤 欧月珍 《实用医学杂志》 CAS 北大核心 2023年第13期1647-1651,1656,共6页
目的探讨Life′s Simple 7(LS7)干预减轻Her⁃2阳性乳腺癌患者根治术后化疗相关心血管系统损害的作用。方法将120例Her⁃2阳性并接受标准化乳腺癌化疗的患者随机等量分为对照组及LS7组,对照组为标准化疗方案,LS7组为对照组基础上给予LS7干... 目的探讨Life′s Simple 7(LS7)干预减轻Her⁃2阳性乳腺癌患者根治术后化疗相关心血管系统损害的作用。方法将120例Her⁃2阳性并接受标准化乳腺癌化疗的患者随机等量分为对照组及LS7组,对照组为标准化疗方案,LS7组为对照组基础上给予LS7干预12个月,后续通过比较两组治疗前后心血管系统损伤程度、焦虑、抑郁及生活质量等指标评价其对心血管系统损害的改善作用。结果相较于对照组,LS7组LS7总评分及7项心血管健康指标均优于对照组(P<0.05),LS7组LVEF较高(P<0.05)、NT⁃proBNP较低(P<0.05),焦虑和抑郁评分较低(P<0.05)、生活质量评分较高(P<0.05)。结论LS7干预可显著减轻Her⁃2阳性乳腺癌化疗相关心血管系统损害并改善乳腺癌患者的心理状况和生活质量,值得在临床推广。 展开更多
关键词 Life′s simple 7 乳腺癌 心血管健康 心理状况 生活质量
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成年人Life's Simple 7和非酒精性脂肪性肝病之间的关联
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作者 曾冠男 陈容容 卢世云 《中国医药指南》 2023年第21期29-32,共4页
目的探究成年人中Life's Simple 7与非酒精性脂肪性肝病(NAFLD)之间的关联。方法数据来自2017-2018年国家健康和营养检查调查(NHANES)中招募的成年人。排除HBsAg阳性、抗-HCV阳性和大量饮酒后,通过肝脏振动控制瞬时弹性成像(VCTE)对... 目的探究成年人中Life's Simple 7与非酒精性脂肪性肝病(NAFLD)之间的关联。方法数据来自2017-2018年国家健康和营养检查调查(NHANES)中招募的成年人。排除HBsAg阳性、抗-HCV阳性和大量饮酒后,通过肝脏振动控制瞬时弹性成像(VCTE)对NAFLD进行诊断。参考既往的研究计算Life's Simple 7,0~8分为低分组(inadequate),9~10分为平均组(average),11~14分为优秀组(optimal)。进行多因素Logistic回归分析相关性。结果分析了2376名参与者的数据。NAFLD的总患病率为42.0%,在inadequate、average和optimal评分类别中的患病率分别为62.5%、33.4%和10.8%(P<0.001)。多因素Logistics回归分析,调整了年龄、性别、种族和贫困收入比率(PIR)后显示Life's Simple 7得分越高,NAFLD患病风险降低。跟inadequate组对比,average组OR值为0.31(95%CI:0.23-0.42),optimal组的OR值为0.08(95%CI:0.05-0.13)。根据分层分析,这种关联在不同年龄、性别、种族和经济群体中是相似的。结论越高的Life's Simple 7评分与越低的NAFLD患病率相关。拥有理想的心血管健康指标可能有利于降低普通成年人NAFLD的患病率。 展开更多
关键词 Life's simple 7 非酒精性脂肪性肝病
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Simple shear extrusion versus equal channel angular pressing:A comparative study on the microstructure and mechanical properties of an Mg alloy 被引量:2
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作者 A.Rezaei R.Mahmudi +1 位作者 C.Cayron R.E.Logé 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2023年第5期1769-1790,共22页
Two severe plastic deformation(SPD)techniques of simple shear extrusion(SSE)and equal channel angular pressing(ECAP)were employed to process an extruded Mg-6Gd-3Y-1.5Ag(wt%)alloy at 553 K for 1,2,4 and 6 passes.The mi... Two severe plastic deformation(SPD)techniques of simple shear extrusion(SSE)and equal channel angular pressing(ECAP)were employed to process an extruded Mg-6Gd-3Y-1.5Ag(wt%)alloy at 553 K for 1,2,4 and 6 passes.The microstructural evolutions were studied by electron back scattered diffraction(EBSD)analysis and transmission electron microscopy(TEM).The initial grain size of 7.5μm in the extruded alloy was reduced to about 1.3μm after 6 SPD passes.Discontinuous dynamic recrystallization was suggested to be operative in both SSE and ECAP,with also a potential contribution of continuous dynamic recrystallization at the early stages of deformation.The difference in the shear strain paths of the two SPD techniques caused different progression rate of dynamic recrystallization(DRX),so that the alloys processed by ECAP exhibited higher fractions of recrystallization and high angle grain boundaries(HAGBs).It was revealed that crystallographic texture was also significantly influenced by the difference in the strain paths of the two SPD methods,where dissimilar basal plane texture components were obtained.The compression tests,performed along extrusion direction(ED),indicated that the compressive yield stress(CYS)and ultimate compressive strength(UCS)of the alloys after both SEE and ECAP augmented continuously by increasing the number of passes.ECAP-processed alloys had lower values of CYS and UCS compared to their counterparts processed by SSE.This difference in the mechanical responses was attributed to the different configurations of basal planes with respect to the loading direction(ED)of each SPD technique. 展开更多
关键词 Mg-Gd-Y alloys Severe plastic deformation simple shear extrusion Equal channel angular pressing Dynamic recrystallization Mechanical properties
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基于Simple Seasonal模型上网电量和厂用电量的发电量预测 被引量:1
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作者 李雍睿 禹加 杨朔 《电力系统装备》 2023年第3期37-40,共4页
近年来,预测发电量统计引起国家电网的高度关注。供电企业对发电量进行预测,不仅能满足社会用电要求,还能提高企业的竞争力。文章以辽宁省的两个火电厂为例,采用Simple Seasonal模型预测未来1个月的上网电量和厂用电量,进而统计发电量... 近年来,预测发电量统计引起国家电网的高度关注。供电企业对发电量进行预测,不仅能满足社会用电要求,还能提高企业的竞争力。文章以辽宁省的两个火电厂为例,采用Simple Seasonal模型预测未来1个月的上网电量和厂用电量,进而统计发电量的预测值。在确保电网安全前提下,不仅可以保障电力供应平稳有序,最大限度减少因无序用电带来的损失,还可以为节约用电开辟一条新的道路。 展开更多
关键词 simple Seasonal 上网电量 厂用电量 发电量 预测 时间序列
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Symmetry phases of asymmetric simple exclusion processes on two lanes with an intersection
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作者 田波 文万强 +1 位作者 李阿敏 夏萍 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第7期317-324,共8页
This paper studies two-lane asymmetric simple exclusion processes(ASEPs)with an intersection.In the upstream segments of the intersection,one particle can move to the next site with rate 1 if the site is empty,and the... This paper studies two-lane asymmetric simple exclusion processes(ASEPs)with an intersection.In the upstream segments of the intersection,one particle can move to the next site with rate 1 if the site is empty,and the other particle can move forward with rate p in the sites of downstream segments.The parameter p can represent the rate of slowing of motion,and the parameter is introduced to investigate spontaneous symmetry breaking(SSB)phenomenon.Extensive Monte Carlo simulations are carried out.It is shown that three symmetric phases exist and the SSB does not exist in the system.Simple mean field approach in which correlation of sites is ignored is firstly adopted to analyze the system,and the system is divided into four independent segments.It is found that the analytical results deviate from the simulation ones,especially when p is small.In addition,the inexsitence of SSB can only be explained qualitatively.Motivated by this,we carry out the cluster mean field analysis in which correlation of five sites is considered.It is shown that densities of the two upstream segments are equal,which demonstrates that the SSB does not exist.It is also shown that,as expected,the cluster mean field analysis performs much better than the simple mean field analysis. 展开更多
关键词 asymmetric simple exclusion process spontaneous symmetry breaking simple mean-field analysis cluster mean-field analysis
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A Simple One-Step System Enhances the Availability of High-Quality Sperm for Assisted Reproductive Procedures
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作者 Sam Prien Trinity Moseley +3 位作者 Nirvika Singh-Sharma Juergen Liebermann Matthew D. VerMilyea Lindsay L. Penrose 《Open Journal of Obstetrics and Gynecology》 2023年第10期1676-1687,共12页
Over the last forty years, in vitro fertilization, which has expanded to assisted reproductive technologies (ART), has gone from an experimental procedure to the mainstay of infertility treatment. A technique that onc... Over the last forty years, in vitro fertilization, which has expanded to assisted reproductive technologies (ART), has gone from an experimental procedure to the mainstay of infertility treatment. A technique that once made news with each birth is now responsible for 2% - 3% of the babies born in several nations of the world. This has happened due to significant advances in hormone therapies, culture techniques, and the specialization of equipment designed to support oocytes and embryos. However, for all the advances made to support female fertility, little has changed in male treatment since the advent of intracytoplasmic sperm injection in the early 1990’s. Recently, a number of authors have documented problems with sperm preparation techniques. Some report DNA damage, others membrane and organelle issues, all of which potentially hamper fertilization rates and possibly take-home baby rates. Further, as the clinical workload of ART has increased and staffing shortages have become critical, all labs are looking for simpler, more efficient ways to perform job functions. This study describes a simple, one-step method for preparing semen samples for ART. This new technique minimizes excessive manipulation of the sample compared to current standards and is less likely to cause cell damage. Preliminary results suggest a significant enhancement in recovered sample motility and an optimal sample for ART procedures with minimal sample manipulation. 展开更多
关键词 simple Enhanced SPERM Processing
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PD-like finite time controller with simple structure for satellite attitude control
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作者 Li You Ye Dong Xiao Bing 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2023年第8期123-133,共11页
A finite time controller with PD-like structure for satellite attitude control is proposed in this paper.The controller is constructed with simple structure based on standard PD controller.The fractional order term is... A finite time controller with PD-like structure for satellite attitude control is proposed in this paper.The controller is constructed with simple structure based on standard PD controller.The fractional order term is designed hence system could both have strong robustness and finite time convergence rate,and the advantage of finite time control and PD control is combined in this paper.System convergence rate is discussed by Lyapunov method,and the constraint on control parameters is given by implementing the coupled term of angular velocity and attitude quaternion.Moreover,the accuracy at steady stage depending on control parameters is given hence system could converge to this field within finite time.System stability and performance is demonstrated by numerical simulation results. 展开更多
关键词 Finite time control PD-like simple structure Attitude control
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Hopf Algebra of Labeled Simple Graphs
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作者 Jiaming Dong Huilan Li 《Open Journal of Applied Sciences》 CAS 2023年第1期120-135,共16页
A lot of combinatorial objects have a natural bialgebra structure. In this paper, we prove that the vector space spanned by labeled simple graphs is a bialgebra with the conjunction product and the unshuffle coproduct... A lot of combinatorial objects have a natural bialgebra structure. In this paper, we prove that the vector space spanned by labeled simple graphs is a bialgebra with the conjunction product and the unshuffle coproduct. In fact, it is a Hopf algebra since it is graded connected. The main conclusions are that the vector space spanned by labeled simple graphs arising from the unshuffle coproduct is a Hopf algebra and that there is a Hopf homomorphism from permutations to label simple graphs. 展开更多
关键词 Hopf Algebra Labeled simple Graph Conjunction Product Unshuffle Coproduct Compatibility
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Molecular characterization of sweet potato(Ipomoea batatas[L.]Lam)germplasms for desirable traits by using simple sequence repeats markers
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作者 KHANDAKAR ABUMDMOSTAFIZAR RAHMAN ABDUL SHUKOR JURAIMI +6 位作者 MDREZWAN MOLLA MUHAMMAD ASYRAFMD HATTA ZULKEFLY BIN SULAIMAN SHAMIMA SULTANA AHMED GABER BENUKAR BISWAS AKBAR HOSSAIN 《BIOCELL》 SCIE 2023年第1期227-237,共11页
Every breeding program that aims to create new and improved cultivars with desired traits mostly relies on information related to genetic diversity.Therefore,molecular characterization of germplasms is important to ob... Every breeding program that aims to create new and improved cultivars with desired traits mostly relies on information related to genetic diversity.Therefore,molecular characterization of germplasms is important to obtain target cultivars with desirable traits.Sweet potato[Ipomoea batatas(L.)Lam]is widely considered the world’s most important crop,with great diversity in morphological and phenotypic traits.The genetic diversity of 20 sweet potato germplasms originating from Bangladesh,CIP,Philippines,Taiwan,and Malaysia were compared,which was accomplished by genetic diversity analysis by exploring 20 microsatellite DNA markers for germplasm characterization and utilization.This information was effective in differentiating or clustering the sweet potato genotypes.A total of 64 alleles were generated using the 20 primers throughout the 20 germplasm samples,with locus IBS97 having the highest number of alleles(5),whereas locus IbU33 had the fewest alleles(2).The alleles varied in size from 105(IbU31)to 213 base pairs(IBS34).The Polymorphism Information Content(PIC)values for the loci IbL46 and IBS97 varied from 0.445 to 0.730.IBS97 has the highest number of effective alleles(3.704),compared to an average of 2.520.The average Shannon’s diversity index(H)was 1.003,ranging from 0.673 in IbU3 to 1.432 in IBS97.The value of gene flow(Nm)varied between 0.000 and 0.005,with an average of 0.003,whereas genetic differentiation(FST-values)ranged between 0.901 and 1.000.The sweet potato germplasm included in this study had a broad genetic base.SP1 vs.SP9 and SP12 vs.SP18 germplasm pairings had the greatest genetic distance(GD=0.965),while SP1 vs.SP2 germplasm couples had the least genetic diversity(GD=0.093).Twenty genotypes were classified into two groups in the UPGMA dendrogram,with 16 genotypes classified as group“A”and the remaining four genotypes,SP10,SP18,SP19,and SP20,classified as group“B.”According to cluster analysis,the anticipated heterozygosity(gene diversity)of Nei(1973)was 0.591 on average.In summary,SSR markers successfully evaluated the genetic relationships among the sweet potato accessions used and generated a high level of polymorphism.The results of the present study will be useful for the management of germplasm,improvement of the current breeding strategies,and the release of new cultivars as varieties. 展开更多
关键词 Sweet potato simple sequence repeats(SSRs) Genetic diversity DENDROGRAM
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基于SIMPLE药学服务模式的药物指导在呼吸内科慢性病患者用药管理中的效果评估
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作者 于盼盼 《中国科技期刊数据库 医药》 2023年第9期51-54,共4页
对基于SIMPLE药学服务模式的药物指导应用于呼吸内科慢性病患者用药管理中的应用效果进行评估。方法 自我院2021年8月~2022年8月间收治的呼吸内科慢性病患者中随机抽选本次研究对象,筛选后符合相关标准的共计108例,组织患者集中抽签,分... 对基于SIMPLE药学服务模式的药物指导应用于呼吸内科慢性病患者用药管理中的应用效果进行评估。方法 自我院2021年8月~2022年8月间收治的呼吸内科慢性病患者中随机抽选本次研究对象,筛选后符合相关标准的共计108例,组织患者集中抽签,分别设置红色球54颗,黄色球54颗,抽到红色球的患者进入研究组,抽到黄色球的患者进入对照组,由此每组可均分54例。对照组患者接受常规药学服务模式下的药物指导,研究组患者则基于SIMPLE药物服务模式进行药物指导,对两种模式取得的临床效果展开对比。结果 干预进行至第3个月与第6个月时,所有患者在吸入装置使用方面的评分较前有所改善,但研究组患者的评分更高(P<0.05);干预进行至第3个月与第6个月时,所有患者的肺功能指标逐渐好转,对比研究组与对照组数据,发现研究组更具优势(P<0.05);干预结束时,研究组患者在安全用药方面的评价明显高于对照组,各维度评分均表现出显著差异(P<0.05);干预期间,研究组患者更少出现不良反应,组间数据对比:研究组(3.70%)vs对照组(20.37%)有明显优势(P<0.05)。结论 基于SIMPLE药学服务模式的药学指导能够规范呼吸内科慢性病患者的用药行为,提升其吸入装置使用能力,改善患者的临床症状,有较高的临床应用价值。 展开更多
关键词 simple药学服务模式 药物指导 呼吸内科慢性病 用药管理
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A Class of Simple Modules for Electrical Lie Algebra of Type D_(5)
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作者 陈雨露 申冉 张建刚 《Journal of Donghua University(English Edition)》 CAS 2023年第2期232-236,共5页
The simple modules for electrical Lie algebra of type D5 were investigated.The sufficient and necessary criteria of the simple Z-graded highest weight modules were established by means of determining the singular vect... The simple modules for electrical Lie algebra of type D5 were investigated.The sufficient and necessary criteria of the simple Z-graded highest weight modules were established by means of determining the singular vectors of the Verma modules.The simple highest weight module is isomorphic to either that for the symplectic Lie algebra sp4 or Verma module. 展开更多
关键词 electrical Lie algebra simple module highest weight module
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利多卡因联合布地奈德雾化对小儿鼾症术后疼痛及康复效果的影响
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作者 崔明 王永贞 +1 位作者 陈丹丹 郝丽 《河南医学研究》 CAS 2024年第7期1239-1242,共4页
目的探讨利多卡因联合布地奈德雾化对小儿鼾症术后疼痛及康复效果的影响。方法选取2022年1—12月在郑州大学附属儿童医院行小儿鼾症手术的118例患儿,随机分为两组,对照组59例和研究组59例,对照组接受生理盐水进行雾化吸入,研究组接受利... 目的探讨利多卡因联合布地奈德雾化对小儿鼾症术后疼痛及康复效果的影响。方法选取2022年1—12月在郑州大学附属儿童医院行小儿鼾症手术的118例患儿,随机分为两组,对照组59例和研究组59例,对照组接受生理盐水进行雾化吸入,研究组接受利多卡因联合布地奈德进行雾化吸入,随访6个月,比较两组术后1、3、5 d的儿童特殊疼痛行为反应评分量表(FLACC)评分、康复效果,术前、术后6个月(术后)的通气功能和睡眠质量,以及不良反应发生情况。结果术后1、3、5 d研究组FLACC评分与对照组比较,更低(P<0.05)。研究组康复效果优于对照组(P<0.05),研究组康复总有效率与对照组比较,更高(P<0.05)。术后,两组最低血氧饱和度(LSaO_(2))较术前均升高(P<0.05),两组呼吸暂停低通气指数(AHI)、氧减指数(ODI)较术前均降低(P<0.05),且研究组LSaO_(2)与对照组比较,更高(P<0.05),研究组AHI、ODI与对照组比较,更低(P<0.05)。术后,两组儿童睡眠问卷(PSQI)、爱泼沃斯嗜睡量表(ESS)评分较术前均降低(P<0.05),且研究组与对照组比较,更低(P<0.05)。与对照组的不良反应发生率(18.64%)比较,研究组(3.39%%)更低(P<0.05)。结论利多卡因联合布地奈德雾化应用于小儿鼾症手术患儿,可有效减轻术后疼痛,提高康复效果,改善通气功能,提高睡眠质量,降低不良反应发生率。 展开更多
关键词 小儿鼾症 利多卡因 布地奈德 雾化 疼痛 康复
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基于并行BICGSTAB的不可压流场计算方法
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作者 陈涛 《科技创新与应用》 2024年第25期149-152,156,共5页
不可压缩流动广泛存在于日常生活及工程应用之中,随着数值模拟规模不断扩大,CFD算法越来越重视并行计算。该文采用SIMPLE算法对不可压流场进行求解,为求解算法中的大型稀疏矩阵,该文发展一套基于MPI框架的并行BICGSTAB矩阵求解方法。最... 不可压缩流动广泛存在于日常生活及工程应用之中,随着数值模拟规模不断扩大,CFD算法越来越重视并行计算。该文采用SIMPLE算法对不可压流场进行求解,为求解算法中的大型稀疏矩阵,该文发展一套基于MPI框架的并行BICGSTAB矩阵求解方法。最后采用定常顶盖驱动流算例及非定常圆柱绕流算例验证并行算法的可行性及准确性。 展开更多
关键词 不可压缩流动 simple算法 BICGSTAB算法 并行计算 数值模拟
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内镜逆行性阑尾炎治疗在小儿阑尾炎中的应用价值 被引量:1
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作者 曾玲 《中国当代医药》 CAS 2024年第17期26-29,共4页
目的探讨内镜逆行性阑尾炎治疗(ERAT)在小儿阑尾炎的应用价值。方法选取2021年1月至2022年6月赣州市人民医院收治的60例急性单纯性阑尾炎患儿为对象,按照随机数表法分为试验组(n=30)和对照组(n=30)。对照组行抗生素治疗,试验组行ERAT治... 目的探讨内镜逆行性阑尾炎治疗(ERAT)在小儿阑尾炎的应用价值。方法选取2021年1月至2022年6月赣州市人民医院收治的60例急性单纯性阑尾炎患儿为对象,按照随机数表法分为试验组(n=30)和对照组(n=30)。对照组行抗生素治疗,试验组行ERAT治疗。比较两组相关时间指标、并发症发生率、治疗前后白细胞水平。结果试验组的症状缓解时间、白细胞恢复时间、体温恢复时间、住院时间短于对照组,差异有统计学意义(P<0.05);两组的并发症总发生率比较,差异无统计学意义(P>0.05);试验组治疗后1 d的白细胞水平低于对照组,差异有统计学意义(P<0.05);试验组的复发率低于对照组,差异有统计学意义(P<0.05)。结论内镜逆行性阑尾炎治疗方案在小儿单纯性阑尾炎治疗中的应用对促进患儿症状快速缓解、缩短患儿住院时间等均有显著效果,可有效降低患儿复发率。 展开更多
关键词 急性单纯性阑尾炎 抗生素 内镜逆行性阑尾炎治疗 时间指标 复发
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简易保鲜储藏设备质量评价研究——以北京市为例
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作者 蒋晓 禹振军 +3 位作者 盛顺 卜小东 贾利涛 陈向东 《中国农机化学报》 北大核心 2024年第7期135-140,151,共7页
为实现简易保鲜储藏设备的推广应用,需要先确定简易保鲜储藏设备的质量评价方法。通过分析研究简易保鲜储藏设备质量调查评价方法并进行实际应用,对简易保鲜储藏设备的安全性、可靠性、适应性和售后服务状况等内容进行调查及评价,掌握... 为实现简易保鲜储藏设备的推广应用,需要先确定简易保鲜储藏设备的质量评价方法。通过分析研究简易保鲜储藏设备质量调查评价方法并进行实际应用,对简易保鲜储藏设备的安全性、可靠性、适应性和售后服务状况等内容进行调查及评价,掌握在用保鲜储藏设备的整体质量水平。在分析研究简易保鲜储藏设备的组成结构、参数及功能原理、用途、设备实际运行使用过程中可能出现的状况及故障、用户使用设备的质量要求及服务感受的基础上,设置设备质量评价指标,每个指标赋予不同的权重系数。其中一级指标5个,分别是安全性、适用性、可靠性、物料使用负荷程度、售后服务;二级指标25个。一级指标中安全性25分、适用性20分、可靠性20分、物料使用负荷程度20分、售后服务15分。调查结果表明,简易保鲜储藏设备所有样本加权得分为83.10。3家公司的产品生产使用性能较好,达到产品设计标准。 展开更多
关键词 北京市 简易保鲜储藏设备 质量评价 权重系数
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夏季长江口邻近海域活体底栖有孔虫优势种群及分布特征研究
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作者 张晓洁 肖柳 +4 位作者 郭肖伊 南海明 张涵 王飞飞 许博超 《中国海洋大学学报(自然科学版)》 CAS CSCD 北大核心 2024年第8期74-82,共9页
针对长江口及其邻近海域活体底栖有孔虫相关研究较为缺乏的问题,本研究对2016年7月长江口海域33个站位的表层沉积物进行了活体底栖有孔虫属种的鉴定和分析。发现研究海域活体底栖有孔虫共23属31种,丰度范围为0~21 ind./g,简单分异度范围... 针对长江口及其邻近海域活体底栖有孔虫相关研究较为缺乏的问题,本研究对2016年7月长江口海域33个站位的表层沉积物进行了活体底栖有孔虫属种的鉴定和分析。发现研究海域活体底栖有孔虫共23属31种,丰度范围为0~21 ind./g,简单分异度范围为0~16种。优势种群为优美花朵虫(Florilus decorus)、杰克逊小九字虫(Nonionella jacksonensis)、亚易变筛九字虫(Cribrononion subincertum)、耳状脓泡虫(Cancris auriculus)、日本半泽虫(Hanzawaia nipponica)、条纹判草虫(Brizalina striatula)、亚洲沙壁虫(Arenoparella asiatica)、毕克卷转虫变种(Ammonia beccarii vars.)和压扁卷转虫(Ammonia compressiuscula)。活体有孔虫丰度较高的区域多集中在A3和A4断面所在海域,而在研究区域的东北部海域丰度整体较低。除长江口门以外,近岸海域具有“丰度高、属种少”的特征,而在A3和A4断面的远岸海域,则具有“丰度高、属种多”的特征。有孔虫的分布情况表明,A.beccarii vars.是研究区域内活体分布最广的种群,F.decorus是活体占比最高的种群,同时也是除A.beccarii vars.以外分布最广的种群。C.subincertum的丰度随离岸距离的增大而迅速减小,是典型的近岸优势种。 展开更多
关键词 活体底栖有孔虫 长江口 优势种群 丰度 简单分异度
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