查询词典 weighted arithmetic average

A new method based on subtractive image segmentation for weighted image fusion is put forward from another viewpoint. It adopts the improved particle swarm optimization to calculating the segmentation threshold of subtractive image and the corresponding weighted fusion coefficient in space domain or in wavelet decomposition domain. Moreover, it doesnt need to construct the eigenspace and quantitative eigenvalue for the weighted fusion coefficients.

本文从另外一个角度提出了一种基于差值图像分割的加权图像融合方法，它采用改进的粒子群优化方法在空间域或小波分解域求解差值图像的分割阈值和对应的加权融合系数，而不需要为计算融合系数而构造特征空间和定量特征关系。

In the present study, only T2-weighted images were aailable for assessment; T1-weighted images had been taken in the axial plane for measurements of erector spinae muscle size,24 and it was not feasible to also obtain T1-weighted sagittal images.

在我们的研究中，仅有T2加权像被用来进行评定，我们做的轴面T1加权像被用来测量骶棘肌的大小了[24]，而同样也获得矢状位的T1加权像是不太可行的。

It can be show different characteristics in the MRI of the orbital diseases, the sheath of the orbital tumor contain certain characteristics, can express soft muscle locate the orbital compartment or outside. and the tumor showed hypointensity or hypo-or isointense mass on T1-weighted images, and iso-or hyperintense or hyperintense mass on T2-weiglited images, inflammation expresses for the orbital inside limit the soft muscle or widespreads excrescent signal, and showed hypo-or isointense mass on Ti-weighted images, and iso-or hyperintense mass on T2-weighted images, the companion contain fatty the eye muscle big or the eye wreath increase thick, the lachrymal gland is swollen.

其在MRI表现各具有影像学特征，眼眶肿瘤多表现为位于眼眶内、外的局限性软组织肿块，MR T1WI呈等或稍低信号，T2WI呈高或等信号多见；炎性假瘤则表现为眶内局限性软组织肿块或弥漫性异常信号，MR T1WI呈低信号，T2WI呈高信号，常伴有眼肌肥大或眼环增厚，泪腺肿大等。

The alternative estimators used in this paper include least squares estimator, stratified weighted least squares estimator, probability weighted least squares estimator, and Quasi-Aitken weighted least squares estimator.

中文摘要抽样调查设计随著资讯需求的增加日益复杂，然若参数的估计方法无法配合所使用的抽样调查设计，则统计推论结果将难以达到预期的精确度。

In this paper, we first give an example that the bilateral weighted shift operator in c_0space is hypercyclic operator and first solve the existence problem of hypercyclic operator in c_0or c_0(Z space . And then we investigate the property of weighted shift operator in c_0 space and an important property of the hypercyclic vector of weighted shift operator in c_0 space and c_0 space. At last we give the concept of weak hypercyclic operator and weak hypercyclic vector , and give the equivalence between the weak hypercyclicity and the hypercyclicity in l~1 space.

本文首先给出了c_0空间上的一个双边左加权移位算子是超循环算子的一个例子，首次解决了c_0 或c_0(Z 空间中超循环算子的存在性问题；接下来分别研究了c_0和c_0空间上的加权移位算子的性质以及c_0和c_0空间上的加权移位算子的超循环向量的一个重要性质，最后提出了弱超循环算子和弱超循环向量的概念，并且给出了I~1空间中弱超循环性与超循环性的等价性。

Results:Most of the intracranial chordoma（16 cases in our group,88 9%）were located in the middle area of the skull base such as clivus and/or sellar region and always invaded extensively the nerves and major in tracranial vessels of skull base.All tumors were hypointense on T1- weighted imaging and heterogeneous hyperintense on T2- weighted imaging,On Gd- DTPA contrast- enhanced T1- weighted imaging 8 chordomas enhanced more markedly,but steady heterogeneous.

结果：颅内脊索瘤大部分（本组16例，占889%）发生于颅底中线处的斜坡和/或鞍区，并广泛侵犯颅底的神经和大血管等重要结构；在T1加权像上肿瘤主要表现为低信号，T2加权像上表现为不均匀高信号，Gd-DTPA静脉注射增强后（8例）均出现较明显的不均匀强化。

The MR protocol involved transverse, coronal, and sagittal noncontiguous T2-weighted single-shot fast spin-echo sequences; transverse fat-suppressed T2-weighted fast SE sequences; transverse T1-weighted gradient-recalled-echo sequences; and transverse and coronal short inversion time inversion-recovery sequences performed through the lower abdomen and pelvis.

MR计划包括于下腹部与骨盆位置执行的，横轴的、冠状的、矢壮轴的非连续T2加权单射快速环绕音波程序；横轴压抑脂肪讯号的T2加权快速SE程序；横轴T1加权梯度回复音波程序；以及横轴、冠状短程反向时间反向回复程序；由2位放射科医师评估MR结果，以及与外科及病理发现、临床追踪数据比较。

Then we real result which can reflect the momentum profit .Our analysis indicates that : the liquidity—weighted investment portfolio can get more profit than equal-weighted investment portfolio, even after adjusted by price impact cost; but its profit fall behind in the market- value-weighted investment portfolio.

我们的实证分析结果显示：流动性加权投资组合的确能够获得比以往研究中广泛使用的等权重组合更好的收益，即使在价格冲击成本调整后仍然如如此；但其收益表现却一直弱于市值加权投资组合的收益表现，这个结果是和国外成熟市场的研究结果是相反的。

The concept of the weighted logarithmic power mean is introduced; its relation with two-parameter mean is given; the inequality for weighted logarithmic power mean is derived; the magnitude relation among upper bounds of geometric mean and arithmetic mean of geometrically convex functions are made certain.

建立了几何凸函数的对称拟算术平均不等式，对文献[1]提出的不等式进行了推广统一；引进加权对数幂平均的概念，建立起其与双参数平均之间的关系，得到加权对数平均不等式，从而确定了几何凸函数的几何平均、算术平均的上界的大小关系；最后，提出了几何凸函数的对称拟算术平均不等式的推广问题。

And use frequency formula or weighted harmonic mean formula of weighted arithmetic mean formula to get its mean value.

利用加权算数平均数的频数公式或加权调和平均数公式求其平均值。

For every one of my New Year resolutions, I have been a backslider for years.

说到我的新年决心，我每年都做

With empathy and focus on a feeling level, we can all relate to the common ground of mutuality of emotions.

有了同情心和感觉上一级的重点，我们都可以涉及到相互的情感共同点。