查询词典 approximate differential

PubMed abstract: A training procedure analogous to differential classical conditioning produces differential facilitation of excitatory postsynaptic potentials in the neuronal circuit for the siphon withdrawal reflex in Aplysia.

PubMed摘要：一个类似差异经典制约的训练过程在海兔的呼吸管撤回反射神经通路中产生差异的兴奋性突触后电位促进作用。

The theoretical analysis indicates that the drive unit of tri-axial differential in-pipe robot has automatic differential velocity property without autoeciousness power, furthermore its drive-wheels produce sufficient drawing force. So it adapts to geometry and locomotion constraint in elbow.

理论分析表明，三轴差动式管道机器人驱动单元在弯管处自主差速，无寄生功率产生，驱动轮能够提供足够的拖动力，具有良好的机械自适应特性。

In this paper,by the means of the properties of the differential calculous,the authors had obtained the proofs of the generalizations of the two basic inequalities;and the apply of the differential calculus in the proofs of inequalities.

本文主要介绍高等数学知识———微积分的一些基本性质在证明不等式中的应用，利用微分法证明了中学最重要的两个基本不等式的推广形式和一道奥赛

The thermal stability and crystallization behavior were investigated by differential scanning calorimetry, differential thermal analysis and x-ray diffraction.

利用DSC， DTA 和 XRD对该非晶合金的热稳定性及晶化行为进行了研究。

Results］ the expression of cox-2 in hepatocellular carcinoma and its adjacent tissues with cirrhosis were 70.0% and 92.0% respectively, and they were higher than that in normal liver tissue (20.0%). the cox-2 expression in carcinoma adjacent tissues with cirrhosis was higher than that in hcc. expression of cox-2 in well differential hcc was higher than that in poor differential hcc, and higher in case with metastasis than that without metastasis(p＜0.01).the expression of cox-2 in hcc did not relate to tumor size, tumor capsula and the level of afp.

结果］ cox-2蛋白在hcc、癌旁肝硬化中表达阳性率分别为70.0%和92.0%，显著高于在正常肝组织中的20.0%（p＜0.05），而cox-2在癌旁肝硬化组织中的表达高于hcc组织。cox-2蛋白在分化好hcc中的表达显著高于分化差的hcc（p＜0.05），转移组中cox-2蛋白表达显著高于无转移组（p＜0.01）；而cox-2蛋白的表达与肿瘤大小、有无包膜及afp水平无关。

Expression of COX-2 in well differential HCC was higher than that in poor differential HCC, and higher in case with metastasis than that without metastasis(P＜0.01).The expression of COX-2 in HCC did not relate to tumor size, tumor capsula and the level of AFP.

COX-2蛋白在分化好HCC中的表达显著高于分化差的HCC（P＜0.05），转移组中COX-2蛋白表达显著高于无转移组（P＜0.01）；而COX-2蛋白的表达与肿瘤大小、有无包膜及AFP水平无关。

In order to preserve the varieties of the swarm and avoid to be in premature convergence,a Particle Swarm Optimization algorithm based on the differential evolution mutation is proposed.The new algorithm uses the particle aggregation quality to judge that if the particles in the swarm are congregative so much,then apply the differential evolution to mutate the self prevenient best position of each particle,in order to realize the aim of preserving the varieties of the swarm.

为了保持粒子种群的多样性而避免发生&早熟&的问题，提出一种基于差异演化变异的粒子群优化算法，该方法通过粒子聚集性判断如果粒子群中的粒子过于聚集，则使用差异演化算法对PSO算法中各个粒子的自身历史最佳位置进行变异，以实现保持粒子群种群多样性的目的。

The technique and process for producing differential dyeable slub PET filament yarn are introduced, the differential dyeing principle is analysed, and the influences of the spinning lateral blow.

介绍了异染型涤纶竹节丝的生产技术与工艺流程，分析了异染原理，讨论了纺丝侧吹风、后拉伸倍数、拉伸罗拉绕丝圈数、拉伸温度、定型温度等工艺参数对成品品质与异染效果的影响。

We aim to screen and identify the key potential trans-factors during hemoglobin switch. We firstly analyzed differential expression of mRNAs in erythroid induction cultures of CD34+ cells derived from normal umbilical cord blood, adult bone marrow, and bone marrow of a heterocellular hereditary persistence of fetal hemoglobin patient. We identified ZF (HCF-binding transcription factor, Zhangfei) and SH3GLB1(SH3-domain GRB2-like endophilin B1) that had differential expression in the above three cultures. Furthermore, we confirmed the different expression of the above two genes by quantitative real-time PCR.

为鉴别影响珠蛋白基因表达和开关的新的重要调节因子，我们首先分析了人脐带血、正常成人骨髓和异细胞型胎儿血红蛋白持续存在综合症患者骨髓细胞红系诱导培养物中基因表达的差异，发现ZF(HCF-binding transcription factor，Zhangfei)和SH3GLB1（SH3-domain GRB2-like endophilin B1）在这三种不同来源的红细胞内具有显著的表达差异，并通过实时定量PCR方法验证了差异的真实性。

The extraordinary activity of taphrogenic differential settlement of late caused great damage and economy loss to urban building, it will greatly jeopard the tunnel engineering recently . Two-dimension limited system theory and simulation modeling to two-dimension limited system theory for Xi'an taphrogenic differential settlement was set up based on real and forecasting data near umpty years.

西安地裂差异沉降近期超常活动，给城市建设造成了严重的经济损失和危害，并对将要建设的地铁工程危害极大，根据近几十年来的实测和预测资料，通过建立二维有限元模型和地裂差异沉降的二维有限元仿真模拟，得出 2 0 0 5年到 2 0 5 0年地裂差异沉降累积值为 84.7m m，水平位移量为 3 6.3 mm。

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。