We prove that if G is a gap-free and chair-free simple graph,then the regularity of the edge ideal of G is no more than 3.If G is a gap-free and P4-free graph,t
目的:分析多层螺旋CT对孤立性肺结节良恶性鉴别诊断准确率。方法:选取2018年3月—2020年10月我院孤立性肺结节患者70例,采用多层螺旋CT进行诊断,对比不同诊断方式效果。结果:恶性结节患者和良性结节相比得血流量、血容量、平均通过时间、增强净增值指标更高,差异较大(P<0.05);多层螺旋CT诊断阳性率为88.33%;采用多层螺旋CT进行诊断时特异度和有效度均较高。结论:对于孤立性肺结节患者进行多层螺旋CT诊断可有效提升诊断有效度,且诊断特异度和有效度均较高。
目的:探讨胸部肿瘤影像诊断技术应用效果。方法:选取我院在2018年1月—2020年7月收治的80例胸部肿瘤患者为研究对象,对患者行CR胸部检查,同时进行窗位、窗宽的调节,图像行正负翻转,增强边缘性,采取放大图像与伪彩处理技术,对患者采取CAT与MRA技术、CT仿真气管内窥镜技术分别诊断,针对影像诊断鉴别结果准确性进行对比、分析。结果:通过合理运用先进的影像诊断技术,CT仿真气管内窥镜技术诊断结果准确性更高,能够更清晰了解患者肿瘤边缘特征,包括肿瘤与周围结构间的联系,差异比较显著,具有良好统计学意义(P&l
Let A be a ring.In this paper we generalize some results introduced by Aliabad and Mohamadian.We give a relation between the z-ideals of A and those of the form
This short survey contains some recent developments of the algebraic theory of racks and quandles.We report on some elements of representation theory of quandle
This paper deals with reductions of ideals in various settings of pullback constructions.Precisely,we investigate reductions of several types of ideals in both
A module satisfying the descending chain condition on cyclic submodules is called coperfect.The class of coperfect modules lies properly between the class of lo
目的:探究分析甲状腺超声检查的临床价值。方法:2019年1月—2020年1月为本研究年限区间范围,纳入500例2型糖尿病患者为研究组,另选取同期至我院健康体检人员500例为对照组,两组均行甲状腺超声检查,研究组患者增加CT检查,分析具体检查结果。结果:对比两组甲状腺结节检出率、甲状腺回声异常检出率、甲状腺肿大检出率、甲状腺体积等甲状腺超声检查结果,研究组分别为71.8%、37.4%、20.8%、(18.66±4.59)mm3,对照组分别为37.4%、20.8%、3.4%、(13.72
Let R be a ring and n be a positive integer.Then R is called a left n-C2-ring (strongly left C2-ring) if every n-generated (finitely generated) proper right ide