共查询到19条相似文献，搜索用时 125 毫秒
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文献[1]证明了半群S含有极小I-稠密子集的充要条件是S满足弱I-极小条件 在此基础上进一步证明了半群S含有有限I-稠密子集的充要条件是S满足I-链条件,并由此还得到一个半群是Artin半群的充要条件 相似文献
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所有双理想都是理想的半群定义为I0-半群,所有子半群都是双理想的半群定义为C0-半群;得到正则半群S是I0-半群当且仅当B（S）是半格;π-正则半群S是C0-半群,则S是矩形带的幂零扩张. 相似文献
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本文给出了Γ -半群的Green’s的一种等价刻画 ,讨论了 (左 ,右 )单Γ -半群的某些性质 ,刻画了Γ -半群的极小 (左 ,右 )Γ -理想和极大 (左 ,右 )Γ -理想 相似文献
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序半群的素模糊理想 总被引：1，自引：0，他引：1
谢祥云 《江西教育学院学报》2003,24(3):1-3
对序半群S的素模糊理想进行了研究，借助序半群S的模糊点和模糊左(右)理想给出了序半群S的素模糊理想的刻画。 相似文献
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本文证明了具有条件(S)的BCK-代数的伴随半群是一个可换蕴涵半群;同时讨论了具有条件(S)的BCK-代数的理想与它的伴随半群的序滤子之间的关系. 相似文献
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杨燕 《商洛师范专科学校学报》2013,(4):40-42
半群S称为E-反演半群,如果对于S中的每-个元素α,存在α∈S,使得ax是S的幂等元。半群S称为E-稠密半群,如果S是E-反演半群并且幂等元相乘可交换。利用E-稠密半群局部化的结论,给出了E-稠密半群上的最小群同余的-个表示及若干等价刻画。在对强仃-逆半群和逆半群上-些结果进行推广的同时,也获得了强仃-逆半群和逆半群上最小群同余的-些新的结论。 相似文献
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半群S称为E-反演半群,如果对于S中的每一个元素a,存在x∈S,使得ax是S的幂等元。半群S称为E-稠密半群,如果S是E-反演半群并且幂等元相乘可交换。研究了E-稠密半群的局部化,证明了E-稠密半群在其幂等元半格上的局部化存在并且在同构意义下唯一。作为局部化的应用,证明了局部化同构于其最大群同态象,这推广了强π-逆半群和逆半群的相应结论。 相似文献
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本文证明了具有条件（S）的BCK－代数的伴随半群是一个可换蕴涵半群，同时讨论了具有条件（S）的BCK－代数的理想与它的伴随半群的滤子之间的关系。 相似文献
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P-析取（I-析取）ω-语言是P-稠密的（I-稠密的）.为了判断一个给定的ω-语言是否为P-稠密的（I-稠密的）,定义了P-稠密辖区和I-稠密辖区,并证明其与稠密辖区等价. 相似文献
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本文将邱成桐的关于常曲率空间紧致极小子流形的一个Simons型公式推广到局部对称紧致黎曼流形的紧致极小流形中去 相似文献
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讨论7维单位球面S7上第二基本形式模长平方S为常数的紧致极小超曲面的第二空隙问题.假设具有三个互异的主曲率且重数相同(其中重数为2),得到以下结果:若S>6,则S>11. 相似文献
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刘兵 《鞍山师范学院学报》1999,(1)
提出了两状态流约束通讯网络可靠度计算的一个组合路算法 ,算法在 S.Rai和 S.Soh[6] 的 CPE算法基础上 ,重新将极小路分类 ,定义了新的路的组合规则 ,减少了组合路数 . 相似文献
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The Egger-Miller information hypothesis was tested in a nonoverlapping compound stimulus CER situation. During CER training, S2, the so-called redundant stimulus, acquired greater suppression qualities than S1. However, following CER training, subjects were exposed to test situations in which the independent suppression qualities of S1 and S2 were assessed. S1 was followed by a trace interval, S2 was presented alone, or the S1–S2 sequence was reversed. Results of all test conditions showed minimal suppression to S2, while suppression to S1 was maintained or facilitated. It was suggested that S2, although a redundant predictor of shock occurrence, provides information as to “when” shock is due. 相似文献
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In most U.S. schools, teachers are evaluated using observation of teaching practice (OTP). This study investigates rater effects on OTP ratings among 421 principals in an authentic teacher evaluation system. Many-facet Rasch analysis (MFR) using a block of shared ratings revealed that principals generally (a) differentiated between more and less effective teachers, (b) rated their teachers with leniency (i.e., overused higher rating categories), and (c) differentiated between teaching practices (e.g., Cognitive Engagement vs. Classroom Management) with minimal halo effect. Individual principals varied significantly in degree of leniency, and approximately 12% of principals exhibited severe rater bias. Implications for use of OTP ratings for evaluating teachers’ effectiveness are discussed. Strengths and limitations of MFR to analyze rater effects in OTP are also discussed. 相似文献
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邓严林 《沙洋师范高等专科学校学报》2004,5(5):9-11
本文研究了S^n p中的n雏紧致全实极小子流形的一类Schrǒdinger算子的第一特征值，得到了一个它的上界的估计，并由此给出它的一个重要应用． 相似文献
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通过琼脂平板法测定了牛红细胞抗菌肽SP-18对金黄色葡萄球菌、大肠杆菌的抑菌活性,以微量肉汤稀释法测定其对大肠杆菌、金黄色葡萄球菌的最小抑菌浓度（MIC）,并在扫描电镜（SEM）下观察其对细菌生物膜的影响.结果表明：SP-18对金黄色葡萄球菌、大肠杆菌有明显的抑制活性,MIC分别为1.0 mg/mL、0.25 mg/mL;SEM观察发现抗菌肽作用后细菌生物膜发生皱缩、破裂,金黄色葡萄球菌发生膜裂解,大肠杆菌表面出现孔洞结构.研究表明SP-18具有良好的抗菌活性,并通过破坏细菌生物结构的作用机制发挥抑菌效果,在抗菌肽未来的开发应用中具有良好的前景. 相似文献
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Eye movements of two stump-tailed monkeys were measured during performance on an easy and a difficult brightness discrimination problem with and without a relatively long fixation required at the beginning of each trial for purposes of calibration. The duration of an individual fixation of the discriminative stimuli was unrelated to most of the variables that were examined, including problem difficulty, response outcome, whether the S+ or the S? was fixated, and presence or absence of a long fixation at the beginning of a trial. Duration of fixation increased markedly, though temporarily, following reversal of the hard problem. The animals tended to do a minimal amount of scanning of the discriminative stimuli and to fixate most frequently on S+ before responding. In general, the results did not support an account of observing behavior in terms of conventional reinforcement. 相似文献