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Acupuncture at the “Huatuojiaji” point affects nerve root regional interleukin-1 level in a rat model of lumbar nerve root compression 被引量:7
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作者 Yaochi Wu Junfeng Zhang Chongmiao Wang Yanyan Xie Jinghui Zhou 《Neural Regeneration Research》 SCIE CAS CSCD 2008年第8期881-884,共4页
BACKGROUND:It has been shown that interleukin-1 (IL-1) may cause inflammatory reactions, which stimulate the nerve root of patients with lumbar intervertebral disc protrusion and leads to pain. Whether the clinical... BACKGROUND:It has been shown that interleukin-1 (IL-1) may cause inflammatory reactions, which stimulate the nerve root of patients with lumbar intervertebral disc protrusion and leads to pain. Whether the clinical curative effects of acupuncture in the treatment of lumbar and leg pain are linked to an inhibition of local IL-1 secretion is unknown. OBJECTIVE: To assess the influence of acupuncture on IL-1, this study was designed to verify the effects of acupuncture at the "Huatuojiaji (Extra)" point on the nerve root in a rat model of lumbar nerve root compression, compared with administration of meloxicam, a non-steroidal anti-inflammatory drug. DESIGN, TIME AND SETTING: Randomized, controlled, molecular biology experiment, performed at the Experimental Center, Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University between September 2005 and April 2006. MATERIALS: Forty healthy adult Sprague Dawley rats of either gender were included in this study. The rats were randomly and evenly divided into the following four groups: normal control, model, acupuncture and meloxicam groups. Lumbar nerve root compression was induced in rats in the model, acupuncture, and meloxicam groups by inserting a specially made silicon rubber slice at the juncture of the L5 nerve root and the dural sac. The acupuncture needle (pattern number N3030, 30#, 1.5 inch) was purchased from Suzhou Medical Appliance Factory, China. IL-1 enzyme linked immunosorbent assay (ELISA) kit was purchased from Santa Cruz Biotechnology, Inc., USA. METHODS: The acupuncture group was acupunctured at the "Huatuojiaji" point, which is lateral to the compressed L5-6 nerve root, with an acupuncture depth of 0.5 cm. There were two treatment courses, each of involved seven 20-minute acupuncture sessions, one session a day. The meloxicam group was administered intragastrically 3.75 mg/kg meloxicam (5 mg meloxicam /10 mL physiological saline). Rats in the normal control group and model group received an intragastric administration of 10 mL/kg physiological saline. All administrations were performed once a day. MAIN OUTCOME MEASURES: At day 14 post-surgery, the IL-1 level in the compressed nerve root was determined by a streptavidin-peroxidase (S-P) immunohistochemical method, and IL-1β mRNA expression in the compressed nerve root was simultaneously detected by real-time reverse transcription-polymerase chain reaction. RESULTS: The expression levels of IL-1 and IL-1β mRNA in the L5 nerve root were significantly higher in the model group than in the control group (P 〈 0.01). However, the expression levels of IL-1 and IL-1β mRNA were significantly lower in the acupuncture and meloxicam groups than in the model group (P 〈 0.05–0.01). Expression levels of IL-1 and IL-1β mRNA were significantly higher in the acupuncture group than in the meloxicam group (P 〈 0.01). CONCLUSION: Acupuncture at the "Huatuojiaji" point decreases the IL-1 level by inhibiting IL-1β mRNA expression to a greater extent than meloxicam administration. 展开更多
关键词 ACUPUNCTURE INTERLEUKIN-1 "Huatuojiaji" point lumbar nerve root compression models animal
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PRELIMINARY REPORT OF TREATMENT ON STUFFY NOSE AND TINNITUS BY NEEDLING AURICULAR POINT VAGUS NERVE ROOT
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作者 Chen Gongsun, Acupuncture Department, The First Affiliated Hospital of Nanjing Medical College, Nanjing 210029, ChinaChen Xiaohong, The Foreign Language Office of Nanjing Medical College, Nanjing 210029, China 《World Journal of Acupuncture-Moxibustion》 1993年第1期7-9,共3页
This paper introduces the discovery of the acupoint of auricular vagus nerve rootand its function. Especially the therapeutic effect is immediate for stuffy nose and tinnitus. It is easy,simple and effective therapeut... This paper introduces the discovery of the acupoint of auricular vagus nerve rootand its function. Especially the therapeutic effect is immediate for stuffy nose and tinnitus. It is easy,simple and effective therapeutic method without side-effect. 展开更多
关键词 AURICULAR acupuncture Stuffy nose/Tinnitus point of AURICULAR VAGUS nerve root
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iRoot SP配合单尖法根管充填治疗逆行性牙髓炎的效果分析
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作者 曹白雨 《国际医药卫生导报》 2024年第23期3891-3895,共5页
目的分析iRoot SP配合单尖法根管充填治疗逆行性牙髓炎的效果。方法前瞻性研究,选取2022年1月至2023年5月在福建省立医院口腔科治疗的逆行性牙髓炎患者120例作为研究对象,按照随机数字表法分为对照组和观察组,各60例。对照组男35例、女2... 目的分析iRoot SP配合单尖法根管充填治疗逆行性牙髓炎的效果。方法前瞻性研究,选取2022年1月至2023年5月在福建省立医院口腔科治疗的逆行性牙髓炎患者120例作为研究对象,按照随机数字表法分为对照组和观察组,各60例。对照组男35例、女25例,年龄(58.65±4.89)岁,病程(4.12±1.36)年,以iRoot SP配合冷侧方加压法根管充填;观察组男32例、女28例,年龄(59.34±5.27)岁,病程(4.51±1.49)年,以iRoot SP配合单尖法根管充填。对比两组疗效、充填效果、牙周指数[牙周探诊深度(PD)、探诊出血指数(BOP)、牙齿松动度(TM)、临床附着水平(CAL)]及龈沟液炎性因子水平[超敏C反应蛋白(hs-CRP)、肿瘤坏死因子-α(TNF-α)、白细胞介素-1β(IL-1β)]。统计学方法采用t检验、χ^(2)检验。结果观察组治疗总有效率为96.67%(58/60),高于对照组的86.67%(52/60),差异有统计学意义(χ^(2)=3.927,P<0.05)。观察组填充良好率为96.67%(58/60),高于对照组的75.00%(45/60),差异有统计学意义(χ^(2)=11.582,P<0.05)。治疗前,两组患者PD、BOP、TM、CAL及hs-CRP、TNF-α、IL-1β水平比较,差异均无统计学意义(均P>0.05);治疗后,观察组PD、BOP、TM、CAL及hs-CRP、TNF-α、IL-1β水平均低于对照组[(1.97±0.23)mm比(2.76±0.26)mm、(0.84±0.19)分比(1.31±0.23)分、(0.12±0.05)mm比(0.27±0.08)mm、(0.94±0.37)mm比(2.10±0.42)mm、(0.78±0.06)mg/L比(1.03±0.09)mg/L、(0.48±0.09)mg/L比(1.01±0.10)mg/L、(56.68±2.34)ng/L比(63.16±2.57)ng/L],差异均有统计学意义(t=17.628、12.203、12.316、16.053、17.903、30.515、14.441,均P<0.05)。结论iRoot SP配合单尖法根管充填治疗逆行性牙髓炎,根管封闭效果较好,可改善患者牙周状态及龈沟液炎性因子水平,整体疗效显著。 展开更多
关键词 逆行性牙髓炎 iroot SP 单尖法根管充填 牙周指数 炎性因子水平
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APPROXIMATE SOLUTION OF A p-th ROOT FUNCTIONAL EQUATION IN NON-ARCHIMEDEAN (2,β)-BANACH SPACES
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作者 Iz-iddine EL-FASSI Hamid KHODAEI Themistocles M.RASSIAS 《Acta Mathematica Scientia》 SCIE CSCD 2019年第2期369-381,共13页
In this paper, using the Brzdek's fixed point theorem [9,Theorem 1] in non-Archimedean(2,β)-Banach spaces, we prove some stability and hyperstability results for an p-th root functional equation ■where p∈{1, …... In this paper, using the Brzdek's fixed point theorem [9,Theorem 1] in non-Archimedean(2,β)-Banach spaces, we prove some stability and hyperstability results for an p-th root functional equation ■where p∈{1, …, 5}, a_1,…, a_k are fixed nonzero reals when p ∈ {1,3,5} and are fixed positive reals when p ∈{2,4}. 展开更多
关键词 fixed point theorem p-th root functional equation stability NON-ARCHIMEDEAN (2 β)-normed SPACES
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Optimize nitrogen fertilization location in root-growing zone to increase grain yield and nitrogen use efficiency of transplanted rice in subtropical China 被引量:9
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作者 WU Meng LIU Ming +3 位作者 LIU Jia LI Wei-tao JIANG Chun-yu LI Zhong-pei 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2017年第9期2073-2081,共9页
The optimized nitrogen fertilization location differs in different rice-growing regions. We optimized nitrogen deep-point application in root-growing zone(NARZ) for transplanted rice in subtropical China. Field plot... The optimized nitrogen fertilization location differs in different rice-growing regions. We optimized nitrogen deep-point application in root-growing zone(NARZ) for transplanted rice in subtropical China. Field plot experiments were conducted over two years(2014–2015) in a double-rice cropping system to evaluate the effects of nitrogen(N) fertilizer location on grain yield and N use efficiency(NUE). Four different nitrogen deep-point application methods(DN) were compared with traditional broadcast application(BN) using granular urea. The results showed that grain yield, recovery efficiency of N(REN), agronomic efficiency of N(AEN), and partial factor productivity of N(PFP_N) significantly increased 10.3–63.4, 13.7–56.7, 24.7–201.9 and 10.2–63.4%, respectively, in DN treatment compared to BN, respectively. We also find that DN treatments increased grain yield as well as grain N content, and thus grain quality, in comparison with conventional BN treatment. Correlation analysis indicated that significant improvement in grain yield and NUE mainly resulted from increases in productive panicle number and grain N content. In our proposed NARZ method, granular urea should be placed 0 to 5 cm around the rice seeding at a 12-cm depth druing rice transplanting. In NARZ, balanced application of N, P and K further improved grain yield and NUE over treatments with a single N deep-point application. High N uptake by the rice plant did not cause significant soil fertility depletion, demonstrating that this method could guarantee sustainable rice production. 展开更多
关键词 N recovery efficiency grain yield deep-point application N application in root-growing zone
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Arm-Root Curve Fitting Based on Body Surface Feature Points for Young Male
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作者 Kaili Liu Hongshu Jin 《World Journal of Engineering and Technology》 2021年第2期241-249,共9页
<div style="text-align:justify;"> This paper is aiming to obtain an arm-root curve function performing the human arm-root size and shape realistically. A gypsum replica of upper arm for young male was ... <div style="text-align:justify;"> This paper is aiming to obtain an arm-root curve function performing the human arm-root size and shape realistically. A gypsum replica of upper arm for young male was made and scanned for extracting the 3D coordinates of 4 feature points of shoulder point, the anterior/posterior armpit point and the axillary point describing the real arm-root shape under the normalized definitions, and the 5 landmarks were confirmed additionally for improving the fitting precision. Then, the wholly and piecewise fitting of arm-root curve with 9 feature points and mark points in total were generated respectively based on least square polynomial fitting method. Comparing to the wholly fitting, the piecewise fitted function segmented by the line between anterior and posterior axillary points showed a high fitting degree of arm-root morphology with R-square of 1, the length difference between fitted curve and gypsum curve is 0.003 cm within error range. And it provided a basic curve model with standard feature points to simulate arm-root morphology realistically by curve fitting for accurate body measurement extraction. </div> 展开更多
关键词 Arm-root Morphology CURVE-FITTING Feature point Piecewise Curve Fitting Arm-root Curve Simulation
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iRoot SP糊剂与AH plus糊剂单尖法根管充填治疗牙体牙髓病患者的效果比较
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作者 郑时懿 《中国民康医学》 2024年第20期149-151,155,共4页
目的:比较iRoot SP糊剂与AH plus糊剂单尖法根管充填治疗牙体牙髓病患者的效果。方法:回顾性分析2021—2023年该院收治的100例牙体牙髓病患者的临床资料,根据所用糊剂不同将其分为对照组和观察组各50例。对照组采用AH plus糊剂单尖法根... 目的:比较iRoot SP糊剂与AH plus糊剂单尖法根管充填治疗牙体牙髓病患者的效果。方法:回顾性分析2021—2023年该院收治的100例牙体牙髓病患者的临床资料,根据所用糊剂不同将其分为对照组和观察组各50例。对照组采用AH plus糊剂单尖法根管充填治疗,观察组采用iRoot SP糊剂单尖法根管充填治疗。比较两组治疗前后疼痛程度[视觉模拟评分法(VAS)]评分、牙周指标[牙龈指数(GI)、龈沟出血指数(SBI)、牙齿松动度]水平、龈沟液炎性因子[肿瘤坏死因子-α(TNF-α)、白细胞介素-6(IL-6)、C反应蛋白(CRP)]水平、咬合力和咀嚼效率。结果:治疗后,观察组VAS评分低于对照组,差异有统计学意义(P<0.05);治疗后,观察组GI、SBI评分和牙齿松动度均低于对照组,差异有统计学意义(P<0.05);治疗后,观察组龈沟液IL-6、TNF-α、CRP水平均低于对照组,差异有统计学意义(P<0.05);治疗后,观察组咬合力、咀嚼效率均高于对照组,差异有统计学意义(P<0.05)。结论:iRoot SP糊剂单尖法根管充填治疗牙体牙髓病患者可降低疼痛程度评分和牙周指标、龈沟液炎性因子水平,提高咬合力和咀嚼效率,效果优于AH plus糊剂单尖法根管充填治疗。 展开更多
关键词 牙体牙髓病 单尖法根管充填 iroot SP糊剂 AH plus糊剂 疼痛 牙周指标 炎性因子
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IRoot Sp糊剂联合牙胶尖一次性根管充填治疗慢性牙髓炎患者的效果
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作者 彭博 《中国民康医学》 2024年第14期53-56,共4页
目的:观察IRoot Sp糊剂联合牙胶尖一次性根管充填治疗慢性牙髓炎患者的效果。方法:选取2022年9月至2023年9月该院收治的76例慢性牙髓炎患者进行前瞻性研究,按随机数字表法将其分为对照组38例(41颗)与观察组38例(42颗)。对照组采用氧化... 目的:观察IRoot Sp糊剂联合牙胶尖一次性根管充填治疗慢性牙髓炎患者的效果。方法:选取2022年9月至2023年9月该院收治的76例慢性牙髓炎患者进行前瞻性研究,按随机数字表法将其分为对照组38例(41颗)与观察组38例(42颗)。对照组采用氧化锌丁香油糊剂联合牙胶尖一次性根管充填治疗,观察组采用IRoot Sp糊剂联合牙胶尖一次性根管充填治疗,比较两组充填效果,治疗前后疼痛程度[视觉模拟评分法(VAS)]评分、牙周相关指标[牙周袋深度(PD)、出血指数(BI)、牙龈指数(GI)、菌斑指数(PLI)]水平和龈沟液炎性因子[肿瘤坏死因子-α(TNF-α)、白细胞介素-6(IL-6)、白细胞介素-10(IL-10)、前列腺素E_(2)(PEG_(2))]水平。结果:观察组充填优良率为94.74%(36/38),高于对照组的73.68%(28/38),差异有统计学意义(P<0.05);治疗后3、7 d,两组VAS评分均低于治疗前,且观察组低于对照组,差异有统计学意义(P<0.05);两组PD、PLI、BI、GI均低于治疗前,且观察组低于对照组,差异有统计学意义(P<0.05);两组TNF-α、IL-10、PEG_(2)、IL-6水平均低于治疗前,且观察组低于对照组,差异有统计学意义(P<0.05)。结论:IRoot Sp糊剂联合牙胶尖一次性根管充填治疗慢性牙髓炎患者可提高充填优良率,降低疼痛程度评分、龈沟液炎性因子水平和牙周相关指标水平,其效果优于氧化锌丁香油糊剂联合牙胶尖一次性根管充填治疗。 展开更多
关键词 慢性牙髓炎 Iroot Sp糊剂 氧化锌丁香油糊剂 牙胶尖 一次性根管充填 疼痛 炎性因子
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The Monotone Iterative Roots of a Class of Self-Mappings on the Interval
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作者 刘新和 《Journal of Mathematical Research and Exposition》 CSCD 2000年第4期483-490,共8页
Let I = [0,1], 0 < a < b < 1. Let Φab ≡ {F ∈ C0(I): both F|[0,a] and F|[b, 1] are strictly increasing, and F|[a, b] is constant }. In this paper we discuss necessary and sufficient conditions for F ∈Φab ... Let I = [0,1], 0 < a < b < 1. Let Φab ≡ {F ∈ C0(I): both F|[0,a] and F|[b, 1] are strictly increasing, and F|[a, b] is constant }. In this paper we discuss necessary and sufficient conditions for F ∈Φab to have monotone iterative roots. 展开更多
关键词 continuous self-map fixed point iterative root.<
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iRoot SP、GuttaFlow2、AH Plus根管封闭剂的临床应用比较 被引量:12
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作者 胡静 杨丽平 +2 位作者 胡辉 钟晓波 齐进 《口腔疾病防治》 2020年第7期433-437,共5页
目的对两种常温流动根充封闭剂(硅酸钙基-iRoot SP、硅氧烷基-GuttaFlow2)结合单尖充填技术以及常用封闭剂(AH Plus)结合连续波热牙胶充填技术的短期临床效果进行评价。方法将279颗患牙(656个根管)随机分为3组,分别为iRoot SP组、GuttaF... 目的对两种常温流动根充封闭剂(硅酸钙基-iRoot SP、硅氧烷基-GuttaFlow2)结合单尖充填技术以及常用封闭剂(AH Plus)结合连续波热牙胶充填技术的短期临床效果进行评价。方法将279颗患牙(656个根管)随机分为3组,分别为iRoot SP组、GuttaFlow2组以及AH Plus组。记录每个根管的充填时间,拍数字化牙片评估每个根管的充填效果,并于术后1周及1月进行回访,记录患者的疼痛发生率。SPSS18.0对以上数据行统计学分析。结果3组的根管充填效果均无统计学差异(P>0.05);iRoot SP组与GuttaFlow2组的充填时间无显著差异(P>0.05),较AH Plus组明显缩短(P<0.05);iRoot SP组与GuttaFlow2组的术后疼痛无统计学差异(P>0.05),iRoot SP组与GuttaFlow2组均较AH Plus组疼痛发生率较低(P<0.05)。结论GuttaFlow2和iRoot SP配合单尖充填技术较常用热牙胶充填技术节省填充时间,且能获得良好的临床效果,术后疼痛发生率较低。 展开更多
关键词 iroot SP GuttaFlow2 AH Plus 常温流动根充封闭剂 牙髓治疗 单尖充填技术 根管治疗术 根管封闭剂 根尖周病 根管填充时间 术后疼痛
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冷侧压法、垂直加压法及iRoot SP糊剂单尖法的根管充填疗效评价 被引量:7
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作者 高萍 王月秋 《中国医药科学》 2021年第20期224-227,236,共5页
目的评价全科医生使用AH-Plus糊剂冷牙胶侧压法、iRoot SP糊剂单尖法和AH-Plus糊剂热牙胶垂直加压法的根管充填疗效。方法将2019年6—12月福建医科大学附属福州市第一医院口腔科和南京医科大学附属口腔医院第四门诊部全科医生治疗的磨... 目的评价全科医生使用AH-Plus糊剂冷牙胶侧压法、iRoot SP糊剂单尖法和AH-Plus糊剂热牙胶垂直加压法的根管充填疗效。方法将2019年6—12月福建医科大学附属福州市第一医院口腔科和南京医科大学附属口腔医院第四门诊部全科医生治疗的磨牙患者按根管充填方法分为A组(冷侧压法)、B组(iRoot SP糊剂单尖法)、C组(垂直加压法),每组各40颗患牙。评价根管充填时间、术后7 d疼痛率、充填质量和半年随访疗效。结果102例患者的116颗患牙中,A组平均每个根管充填时间为(138.27±22.24)s,B组为(56.55±6.21)s,C组为(74.10±7.36)s,差异有统计学意义(P<0.05)。三组疼痛率(13.5%、5.0%、17.9%)比较差异无统计学意义(P>0.05)。三组根管充填质量(89.2%、92.5%、89.7%)和半年随访成功率(89.2%、97.5%、94.9%)比较差异无统计学意义(P>0.05)。结论三组方法均能取得良好疗效,但iRoot SP糊剂单尖法操作简便,更利于全科医生开展复杂根管治疗。 展开更多
关键词 iroot SP 单尖法 垂直加压充填技术 冷侧压充填技术 根管治疗
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Reciproc单支锉清除iRoot SP糊剂单尖法根管充填材料的再治疗效率研究 被引量:2
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作者 高萍 王月秋 +1 位作者 游冬冬 严章勇 《中国医药科学》 2023年第14期157-161,共5页
目的以AH糊剂冷侧压法、热牙胶垂直加压法为对照,口腔锥形束CT(CBCT)三维重建评价使用Reciproc单支锉去除iRoot SP糊剂单尖法术后根管充填材料的再治疗效率。方法选择福建医科大学附属福州市第一医院口腔科2021年7—11月正畸拔除的卵圆... 目的以AH糊剂冷侧压法、热牙胶垂直加压法为对照,口腔锥形束CT(CBCT)三维重建评价使用Reciproc单支锉去除iRoot SP糊剂单尖法术后根管充填材料的再治疗效率。方法选择福建医科大学附属福州市第一医院口腔科2021年7—11月正畸拔除的卵圆形单根管下颌前磨牙90个,采用随机数表法分为iRoot SP糊剂单尖法组(1组)、热牙胶垂直加压组(2组)和AH糊剂冷侧压组(3组)。使用Reciproc单支锉再治疗,终末超声荡洗2 min。分别于根充术后、再治疗、超声荡洗后CBCT扫描并三维重建,记录再治疗时间、根管残余充填材料体积。结果1组再治疗耗时最长,2组最短,差异有统计学意义(P<0.05)。1组残余充填材料最多,大于2组,差异有统计学意义(P<0.05),大于3组,但差异无统计学意义(P>0.05)。超声荡洗后,1组残余量大幅度减少,差异有统计学意义(P<0.05);最终残余量大于2组,差异有统计学意义(P<0.05),大于3组,但差异无统计学意义(P>0.05)。结论无论哪种充填方法,Reciproc单支锉再治疗均不能完全去除充填材料。iRoot SP糊剂单尖法进行再治疗耗时最多,残余量也最多,超声荡洗能够显著减少残余量。 展开更多
关键词 根管再治疗 iroot SP 单尖法 Reciproc单支锉 超声荡洗
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Trends of Shoreline Position: An Approach to Future Prediction for Balasore Shoreline, Odisha, India
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作者 Nilay Kanti Barman Soumendu Chatterjee Ansar Khan 《Open Journal of Marine Science》 2015年第1期13-25,共13页
The present study aims to analyze the shift in shoreline due to coastal processes and formulate available for best estimate of future shoreline positions based on precedent shorelines. Information on rates and trends ... The present study aims to analyze the shift in shoreline due to coastal processes and formulate available for best estimate of future shoreline positions based on precedent shorelines. Information on rates and trends of shoreline change can be used to improve the understanding of the underlying causes and potential effects of coastal erosion which can support informed coastal management decisions. In this paper, researchers go over the changes in the recent positions of the shoreline of the Balasore coast for the 38 years from 1975 through 2013. The study area includes the Balasore coastal region from Rasalpur to Udaypur together with Chandipur, Choumukh, Chandrabali as well as Bichitrapur. Transects wise shoreline data base were developed for approximately 67 kilometers of shoreline and erosional/accretional scenario has also been analysed by delineating the shoreline from Landsat imageries of 1975, 1980, 1990, 1995, 2000, 2005, 2010 and 2013. A simple Linear Regression Model and End Point Rate (EPR) have been adopted to take out the rate of change of shoreline and its future positions, based on empirical observations at 67 transects along the Balasore coast. It is found that the north eastern part of Balasore coast in the vicinity of Subarnarekha estuary and Chandrabali beach undergo high rates of shore line shift. The shoreline data were integrated for long- (about 17 years) and short-term (about 7 years) shift rates analysis to comprehend the shoreline change and prediction. For the prediction of future shoreline, the model has been validated with the present shoreline position (2013). The rate of shoreline movement calculated from the fixed base line to shoreline position of 1975, 1980, 1990, 1995, 2000, 2005 and 2010 and based on this, the estimated shoreline of 2013 was calculated. The estimated shoreline was compared with the actual shoreline delineated from satellite imagery of 2013. The model error or positional shift at each sample point is observed. The positional error varies from??4.82 m to 212.41 m. It has been found that model prediction error is higher in the left hand side of river Subarnarekha. The overall error for the entire predicted shoreline was found to be 41.88 m by Root Mean Square Error (RMSE). In addition, it was tested by means difference between actual and predicted shoreline positions using “t” test and it has been found that predicted shore line is not significantly different from actual shoreline position at (t132 = 0.278) p < 0.01. 展开更多
关键词 Linear Regression Model End point Rate root Mean SQUARE Error SHORELINE Change SHORELINE PREDICTION
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iRoot SP单尖法与冷侧压根管充填的疗效比较 被引量:3
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作者 谭勇华 吴燕玲 《中国实用医药》 2020年第2期13-15,共3页
目的比较iRoot SP单尖法与冷侧压根管充填的临床疗效。方法 60例(60颗磨牙)牙髓炎及慢性根尖周炎患者,按就诊顺序分为观察组30例(30颗磨牙)及对照组30例(30颗磨牙)。观察组采用iRoot SP单尖法充填根管,对照组采用冷侧压充填根管。比较... 目的比较iRoot SP单尖法与冷侧压根管充填的临床疗效。方法 60例(60颗磨牙)牙髓炎及慢性根尖周炎患者,按就诊顺序分为观察组30例(30颗磨牙)及对照组30例(30颗磨牙)。观察组采用iRoot SP单尖法充填根管,对照组采用冷侧压充填根管。比较两组单根根管充填时间、根管充填质量及术后1周疼痛情况。结果观察组单根根管充填时间为(78.25±6.51)s,对照组单根根管充填时间为(132.15±5.43)s,观察组单根根管充填时间短于对照组,差异具有统计学意(P<0.05)。观察组恰充28颗(93.33%),欠充2颗(6.67%),超充0颗(0)。对照组恰充28颗(93.33%),欠充1颗(3.33%),超充1颗(3.33%)。两组恰充率比较,差异无统计学意义(P>0.05)。观察组1例出现疼痛,疼痛率为3.33%;对照组6例出现疼痛,疼痛率为20.00%,观察组疼痛率低于对照组,差异具有统计学意义(P<0.05)。结论 iRoot SP单尖法根管充填操作简单,充填时间短,术后疼痛少,短期疗效可靠。 展开更多
关键词 单尖法 冷侧压充填 iroot SP糊剂 根管治疗
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Self-Certificating Root:A Root Zone Security Enhancement Mechanism for DNS
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作者 Wenfeng Liu Yu Zhang +3 位作者 Wenjia Zhang Lu Liu Hongli Zhang Binxing Fang 《Computers, Materials & Continua》 SCIE EI 2020年第4期521-536,共16页
As a critical Internet infrastructure,domain name system(DNS)protects the authenticity and integrity of domain resource records with the introduction of security extensions(DNSSEC).DNSSEC builds a single-center and hi... As a critical Internet infrastructure,domain name system(DNS)protects the authenticity and integrity of domain resource records with the introduction of security extensions(DNSSEC).DNSSEC builds a single-center and hierarchical resource authentication architecture,which brings management convenience but places the DNS at risk from a single point of failure.When the root key suffers a leak or misconfiguration,top level domain(TLD)authority cannot independently protect the authenticity of TLD data in the root zone.In this paper,we propose self-certificating root,a lightweight security enhancement mechanism of root zone compatible with DNS/DNSSEC protocol.By adding the TLD public key and signature of the glue records to the root zone,this mechanism enables the TLD authority to certify the self-submitted data in the root zone and protects the TLD authority from the risk of root key failure.This mechanism is implemented on an open-source software,namely,Berkeley Internet Name Domain(BIND),and evaluated in terms of performance,compatibility,and effectiveness.Evaluation results show that the proposed mechanism enables the resolver that only supports DNS/DNSSEC to authenticate the root zone TLD data effectively with minimal performance difference. 展开更多
关键词 Domain name system root zone security single point of failure
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基于三维点云计算的CO_(2)-水-岩反应程度量化表征方法 被引量:1
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作者 蒋长宝 程岳 +5 位作者 李春梅 侯典东 杨毅毫 焦冰洋 赵冬 邓博知 《实验技术与管理》 CAS 北大核心 2024年第6期9-19,共11页
CO_(2)地质封存是减少大气中CO_(2)排放,降低温室效应的重要途径,CO_(2)注入含水地层中时,CO_(2)-水-岩反应可能引起岩石矿物的侵蚀,对CO_(2)地质封存安全性产生显著影响。在室内实验中,通过表征岩石表面的形貌特征可以有效地评估CO_(2)... CO_(2)地质封存是减少大气中CO_(2)排放,降低温室效应的重要途径,CO_(2)注入含水地层中时,CO_(2)-水-岩反应可能引起岩石矿物的侵蚀,对CO_(2)地质封存安全性产生显著影响。在室内实验中,通过表征岩石表面的形貌特征可以有效地评估CO_(2)-水-岩反应程度,为CO_(2)地质封存的安全性评估提供科学依据。通过三维点云计算可以精确量化地表征CO_(2)-水-岩反应程度,这种方法首先运用三维激光扫描技术,构建岩石表面的三维模型,确定CO_(2)-水处理前岩石表面三维模型的基准面,并基于处理前的均方根粗糙度确定处理后岩石表面三维模型的基准面。基于三维模型点云信息,提出了两种不同的体积计算新方法,并通过对规则模型体积的计算比较了两种计算方法的准确性与适用性,可根据实际情况选择两种计算方法量化表征CO_(2)-水处理前后岩石表面的侵蚀体积。最后,以陕西省咸阳市某煤矿煤样为例,开展了CO_(2)-水-岩反应模拟试验,验证了计算的可行性。试验结果表明:该文提出的侵蚀体积计算方法可有效地量化表征CO_(2)-水-岩反应程度,CO_(2)-水处理后岩石表面不同区域的侵蚀差异性明显,岩石表面的侵蚀体积与均方根粗糙度之间存在显著的正比关系,随着均方根粗糙度的增大,侵蚀体积也相应上升。 展开更多
关键词 三维点云 CO_(2)-水-岩 基准面 均方根粗糙度 反应程度
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基于AIGC的用户个性化需求服务匹配模型研究
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作者 杨梅 石丽秀 +1 位作者 苏兆婧 朱俊衡 《包装工程》 CAS 北大核心 2024年第20期109-119,182,共12页
目的为解决网购推送内容相关度较低、信息滞后而造成的用户疲劳等问题,优化推送系统的个性化推荐能力,对AIGC推荐算法下的交互模式进行可行性探索。方法基于扎根理论获取用户关联属性并对其排序,进而利用AIGC大模型分别对用户需求信息... 目的为解决网购推送内容相关度较低、信息滞后而造成的用户疲劳等问题,优化推送系统的个性化推荐能力,对AIGC推荐算法下的交互模式进行可行性探索。方法基于扎根理论获取用户关联属性并对其排序,进而利用AIGC大模型分别对用户需求信息和产品特征图文进行处理,最终建立基于AIGC的“用户-产品点对点匹配”(User-Product Point-To-Point Matching)推送模型。结果以水杯网购过程为例,通过对比实验进行验证。实验结果表明,该模式在用户选择信息层和深度搜索等方面可提升用户满意度。结论将AIGC引入推送服务行业,通过“预训练语言模型+微调”的模式实现推荐,能够进一步完善“用户-产品”的个性化推送服务,在电子商务、社交媒体、在线教育服务等领域具有重要意义。 展开更多
关键词 用户需求匹配 AIGC应用 点对点匹配 扎根理论 深度学习
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张振宇精点力学四步手法结合运动康复治疗颈源性肩周痛经验
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作者 冉明山 徐耀 +4 位作者 郑亦斌 徐佳音 范肃 胡芊 张振宇 《北京中医药》 2024年第7期738-741,共4页
颈源性肩周痛是临床常见疾病,因其症状与肩关节周围炎相似,临床易被误诊误治。张振宇教授认为颈5神经背根神经节受刺激后引起肩周不适,从该病理机制入手,利用精点力学四步手法结合康复训练方案治疗本病,能够从根本上解决颈椎及周围结构... 颈源性肩周痛是临床常见疾病,因其症状与肩关节周围炎相似,临床易被误诊误治。张振宇教授认为颈5神经背根神经节受刺激后引起肩周不适,从该病理机制入手,利用精点力学四步手法结合康复训练方案治疗本病,能够从根本上解决颈椎及周围结构退变导致的颈源性肩周疼痛症状及活动功能受限,临床疗效满意。 展开更多
关键词 精点力学手法 颈源性肩周痛 脊背根神经节 临床经验
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基于激光扫描仪的点云配准方法 被引量:1
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作者 褚海漫 程银宝 +3 位作者 李亚茹 罗哉 江文松 王燕 《计量学报》 CSCD 北大核心 2024年第3期433-439,共7页
针对激光扫描仪实际扫描得到的不完整点云配准困难问题,提出了一种基于对应点对的配准方法。通过激光扫描仪进行实验,得到被测工件的实测点云数据,基于Visual Studio软件配置Point Cloud Library环境,对实测模型与理想模型的点云配准进... 针对激光扫描仪实际扫描得到的不完整点云配准困难问题,提出了一种基于对应点对的配准方法。通过激光扫描仪进行实验,得到被测工件的实测点云数据,基于Visual Studio软件配置Point Cloud Library环境,对实测模型与理想模型的点云配准进行研究。首先对实测点云数据进行体素滤波以及均匀下采样的预处理;其次通过对应点对的方式进行对齐为后续精细配准提供较好的变换初值,后基于ICP算法实现点云配准精配准;最终以均方根误差作为点云配准精度评价指标对配准结果进行评价。借助CloudCompare软件对配准结果进行直观展示分析可知,在实测工件本身存在不绝对光滑的情况下,配准的均方根误差可控制在0.62 mm,表明该方法对于不完整点云的配准效果较好。 展开更多
关键词 几何量计量 激光扫描仪 点云配准 ICP算法 均方根误差
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下合穴理论探疑 被引量:1
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作者 宫甜甜 王茎 +1 位作者 李庆羚 曾永蕾 《环球中医药》 CAS 2024年第4期595-599,共5页
下合穴理论是《内经》中论治腑病的经典理论,其出现解决了腑病无所主的困境。古医籍中因无“下合穴”这一名词,使得合穴与下合穴主治条文模糊难辨,造成了五输合穴与下合穴概念上虽存在绝对差异,主治上却相似的尴尬局面。本文基于医书古... 下合穴理论是《内经》中论治腑病的经典理论,其出现解决了腑病无所主的困境。古医籍中因无“下合穴”这一名词,使得合穴与下合穴主治条文模糊难辨,造成了五输合穴与下合穴概念上虽存在绝对差异,主治上却相似的尴尬局面。本文基于医书古籍及临床经验,深入探讨下合穴理论的出现缘由、产生基础、取穴特点及与五输合穴的差异。提出下合穴理论的出现以根结、标本理论为雏形,在气街理论中得到支撑:胫气街经冲脉与腹气街沟通,使腑病下取得以实现,为临床诊疗腑病提供了新的思路。下合穴中上下巨虚与委阳三穴的选取,体现了协调阴阳、上病下取的中医特色诊疗原则。 展开更多
关键词 六腑 下合穴 根结 标本 气街 取穴 合穴 主治
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