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In this paper, the calculating charts and formulae about wave pressure on the breast wall are derived with seven parameters on the basis of physical model study. The verification shows that the charts agree with the example, and are adopted in the Specifications of Fishery Harbours Breakwater by the Ministry of Agricultures. 相似文献
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目的：观察阳和汤联合唑来膦酸治疗阳虚寒凝型乳腺癌骨转移的临床疗效及安全性。方法：将60 例阳虚寒凝型乳腺癌骨转移患者随机分为治疗组和对照组,每组各30 例。对照组给予唑来膦酸注射液治疗,治疗组在对照组基础上加用阳和汤治疗。观察2组的癌痛疗效、生活质量、数字分级法（NRS）评分、中医证候积分、骨代谢指标［血钙、血清骨代谢标志物碱性磷酸酶（ALP）、I型胶原N末端肽（NTX）水平］以及不良反应。结果：骨转移癌痛总有效率治疗组为73.4%（22/30）,对照组为60.0%（18/30）;生活质量总有效率治疗组为86.7%（26/30）,对照组为73.3%（22/30）,2组比较,差异均有统计学意义（P<0.05）。治疗组NRS评分、中医证候积分治疗前后组内比较及治疗后与对照组比较,2组ALP、NTX水平治疗前后组内比较及治疗后组间比较,差异均有统计学意义（P<0.05或P<0.01）。2组血钙水平、不良反应发生率比较,差异均无统计学意义（P>0.05）。结论：阳和汤可以作为阳虚寒凝型乳腺癌骨转移患者的辅助治疗手段,值得临床推广应用。 相似文献
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选取123例乳腺病理性矿化样品,利用光镜、扫描电镜对乳腺矿化进行了微形貌分类研究,并利用统计学方法探讨了乳腺矿化集合体类型与患者年龄、乳腺病变类型和癌变阶段的相关性。研究发现,根据乳腺矿化在光学显微镜下的可分辨形态,将其分为两种类型:粒状集合体与块状集合体;其中粒状集合体为小于200μm的规则粒状钙化,少部分有环带结构,和有机组织结合紧密;而块状集合体则为大于200μm的片状钙化,形状不规则。统计分析数据显示,随年龄增加,块状集合体出现病理比例增加,粒状集合体出现病理比例减少,敏感年龄分区界限为50岁;粒状集合体在50岁以上和50岁以下患者中单独出现的概率分别为24%和53%;块状集合体在乳腺原位癌(71. 4%)患者中占主导,粒状集合体在乳腺纤维腺瘤(64. 5%)患者中占主导。该研究可为未来乳腺癌的诊断提供基于乳腺矿化精细矿物学特征的辅助新方法。 相似文献
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目的：探讨基于动态增强的MRTIWI定量灌注参数伪彩图对导管源性乳腺癌的诊断价值。方法：16例女性手术前行双侧乳腺动态高分辨对比增强MR成像（DCE～MRI）,绘制时间一信号强度曲线（TIC）,基于乳腺动态增强磁共振的数据资料,通过灌注软件获得五种灌注伪彩图,分别为Wash—in、Wash—out、TTP、MIPt及PEI。选取病变的中央（1个）边缘（2个）及对侧相应部位正常乳腺组织（1个）为感兴趣区域,测得其各种灌注参数值,并研究探讨导管源性乳腺癌的灌注特点。结果：16例女性患者经病理学证实为13例浸润性导管癌、3例导管内癌。16个病灶中13例呈非肿块样强化,其中线状／导管样强化7例,斑片样强化5例,斑点状强化1例,另有3例为肿块样强化。16例患者TIC曲线均显示为II型。Wash—in、Wash—out、TTP、MIPt及PEI五种灌注参数图的阳性发现分别为13个、10个、9个、15个、16个病灶,检出率分别为81．25％、62．50％、56．25％、93．75％、100％。对各组灌注参数值进行统计学分析,得出导管源性乳腺癌与对侧相应部位正常乳腺组织之间各参数值具有显著性差异（．=P〈0．001）;除TTP图参数外,病灶周边及病变中心各组参数值对比在统计学上亦具有显著性差异（P〈0．001）。13例浸润性导管癌及3例导管内癌两种疾病的各种灌注参数值对比显示无统计学意义。结论：基于乳腺动态高分辨对比增强的TIWI定量灌注参数图对导管源性乳腺癌的检出率高,可为其诊断和鉴别诊断提供重要的补充信息。 相似文献
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The Above Ground Biomass(AGB) estimates of vegetation comprise both the bole biomass determined through a volumetric equation and litter biomass collected from the ground.For mature trees,the AGB estimated in phenologically different time periods is directly affected by the litter biomass since the Diameter at Breast Height(DBH) and height(H) of such trees that are used in the estimation of bole biomass would remain unchanged over a reasonable time period.In the present study,we have determined the AGB of Sal trees(Shorea robusta) in two contrasting seasons:the peak green period in October being devoid of lit-ter on the ground and the leaf shedding period in February with abundant amount of litter present on the ground.Estimation of AGB for the month of February included the litter biomass.In contrast,the AGB for October represented only the bole biomass.AGB was estimated for ten different plots selected in the study area.The AGB estimated from ten sampling plots for each time period was re-gressed with the individual tree parameters such as the average DBH and height of trees measured from the corresponding plots.The regression analysis exhibited a significantly stronger relationship between the AGB and DBH for the month of October as compared to February.Furthermore,the correlation between the remotely sensed derived data and AGB was also found to be significantly higher for the month of October than February.This observation indicates that inclusion of the litter biomass in AGB will tend to decrease the re-gression relationship between AGB and DBH and also between the remotely sensed data and AGB.Therefore,these conclusions invite careful consideration while estimating AGB from satellite data in phenologically different time periods. 相似文献
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选取9例乳腺炎症、7例乳腺增生的钙化样品,利用光学显微镜(OM)、环境扫描电镜(ESEM)、微区X射线衍射(μ-XRD)等矿物学分析方法对样品进行了原位形貌观察、分离后结构及成分的测试分析,探讨了病灶中钙化的矿物学特征及其组成成分和形成机制。研究结果表明,发生在炎症病灶中的钙化主要类型是脂肪坏死后的钙化,其发生和死亡的脂肪细胞和周围病变后期修复性Ⅲ型胶原有直接关系。增生症中的钙化主要有发生在扩张的导管内和在束状深度交联胶原中的坏死型钙化,扩张的导管边缘处Ⅳ型胶原和大片变性Ⅲ型胶原为钙化提供了成核位点,继而参与无机矿物的形成过程,最后形成较为致密的钙化。乳腺炎症和增生症中的钙化的主要成分均为碳羟磷灰石。 相似文献
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本文利用基于两层双共轭梯度-快速傅立叶变换的矩量法研究了一种新颖的宽带微带单极天线,该天线具有低轮廓特性,尺寸为24×31.7×1.6mm^3。设计的天线具有宽带特性,在3.1 GHz到11 GHz之间的反射系数Sn〈-10dB。详细探讨了上述天线的设计步骤和测试结果,结果证明该天线可以用于乳腺癌成像。 相似文献
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This study compares the accuracies of diameter at breast height (DBH) estimations by three initial (minimum bounding box, centroid, and maximum distance) and two refining (Monte Carlo and optimal circle) circle-fitting methods The circle-fitting algorithms were evaluated in multi-scan mode and a simulated single-scan mode on 157 European beech trees (Fagus sylvatica L.). DBH measured by a calliper was used as reference data. Most of the studied circle-fitting algorithms significantly underestimated the mean DBH in both scanning modes. Only the Monte Carlo method in the single-scan mode significantly overestimated the mean DBH. The centroid method proved to be the least suitable and showed significantly different results from the other circle-fitting methods in both scanning modes. In multi-scan mode, the accuracy of the minimum bounding box method was not significantly different from the accuracies of the refining methods The accuracy of the maximum distance method was significantly different from the accuracies of the refining methods in both scanning modes. The accuracy of the Monte Carlo method was significantly different from the accuracy of the optimal circle method in only single-scan mode. The optimal circle method proved to be the most accurate circle-fitting method for DBH estimation from point clouds in both scanning modes. 相似文献
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母乳中p,p’-DDE浓度是监测母体短期内p,p’-DDE的“静态”蓄积水平,估算婴幼儿每日摄入量的重要技术手段。本文旨在通过监测北京女性两个相邻哺乳期内母乳中p,p’-DDE浓度及变化,估算两次分娩间隔期母体内p,p’-DDE的“动态”富集速度,并根据每日摄入量掌握人体p,p’-DDE的长期变化趋势。在2009年至2019年期间,收集了43名女性首次分娩后六个月内和18名女性第二次分娩后六个月内的母乳样本,并采用气相色谱法检测了母乳中p,p’-DDE的浓度。实验结果表明,母乳中p,p’-DDE浓度在哺乳期持续下降。年龄和分娩次数是母乳中p,p’-DDE浓度的影响因素,p,p’-DDE浓度随母亲年龄增大而升高,随分娩次数增多而降低。18名母亲两个哺乳期内母乳中p,p’-DDE平均排泄速度计算结果表明,排泄速度从18.9μg/kg lipid/month降低到16.8μg/kg lipids/month。而母体两次分娩隔期内p,p’-DDE年富集速度估算值为正,分布在10.9~14.9μg/kg lipids/year之间,每日摄入量分布在29.8~40.8ng/day/kg.b.w.之间。因此北京女性哺乳期母体内p,p’-DDE月排泄速度与母体年富集速度数值相当,母体p,p’-DDE每日摄入量远低于世界卫生组织（WHO）建议值,北京女性是低风险暴露人群。 相似文献
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