查询词典 positive

The text for making every variety positive definite matrix and positive sub-definite matrix to unification, the concept of almost positive definite matrix is given, and its properties and determinant theories are discussed, and many new results are obtained.

本文研究了各类正定矩阵与次正定矩阵的基本性质及行列式理论，提出了准正定矩阵的概念，获得了许多新的结果，推广了Hadamard、Openheim、Ostrowski-Taussky与Minkowski等著名不等式以及屠伯埙、杨新民等的有关结果，扩大了Minkowski不等式的指数范围。

We also give all positive self-adjoint extensions ofsingular differential operators,and all positive self-adjoint operators generated by theproducts of differential expressions 〓,where l is an nth order differentialexpression.The result that each positive self-adjoint operator is not necessarily theform of operator product 〓.This answers an open problem proposed by theauthors recently.

我们也给出了奇型微分算子的所有正自伴扩张形式及乘积微分算式〓所诱导的所有正自伴算子形式，证明〓所诱出的正自伴算子不必须是由算子乘积〓为l所生成的算子）的形式，从而回答了作者新近提出的一个公开问题。

The positive cable from the amplifier positive terminal should connect with the positive terminal on the loudspeaker.

从功放的接线到音箱连接应该与在功放上连接与音箱相连。

Using the Hprt gene as a positive control, our result suggested that both the testis tissue and the male embryos from which Sry transcription can be detected failed to yield any positive results of Xist. Female embryos at the pronucleus stage and 2-cell failed to produce any positive result of Sry and Xist too.

然后利用实验一确定的PCR条件，以Hprt为阳性对照，用巢式RT-PCR对小鼠早期胚胎进行Xist基因的转录分析，结果发现，转录Sry基因的睾丸组织以及雄性胚胎，从受精卵发育到囊胚的过程中，基本上不转录Xist基因；不转录Sry基因的雌性卵母细胞和雌性胚胎，从出现原核开始，到发育至2-细胞期的过程中，Xist基因一直不转录，但是，从4-细胞期开始，一直到孵化前囊胚阶段，雌性胚胎都转录Xist基因。

Results In 194 cases with pulmonary carcinoma, 121 had both brush biopsy and protractor biopsy being positive, 33 cases had only protractor biopsy being positive, and 40 cases had only brush biopsy being positive.

结果 1 94例肺癌病人，刷检、活检共同确诊1 2 1例，仅由活检确诊33例，仅由刷检确诊40例。纤支镜术后痰检阳性53例，提高阳性率2 1 。7%(2 0 / 92 )。

The T; LH and FSH level of serum of male schizophrenia were lower than that of normal control, but the PRL level of serum of male were significant higher than that of normal control, f There wsa a significant relationship between psychiatric symptoms and sex hormones level. There was a positive correlation between extreme and pugnacity factor of PANSS and T level of serum in male schizophrenic patients, There was a negative correlation between psychopathological scores and 〓level of serum in female schizophrenic patients, g There was a significant correlation between neuropsychological tests scores and sex hormones level of serum. There was a significant positive correlation between cognitive function and T level of serum in male schizophrenic patients. There was a significant positive correlation between cognitive function and 〓 in female schizophrenic patients.

治疗后病人的PRL较治疗前有显著提高；6）精神分裂症病人的精神症状与其性激素水平的相关有统计学意义，其中男性病人的T与PANSS中的偏激/好斗呈正相关，女性病人的〓与PANSS中的一般精神病理量表分呈负相关；7）精神分裂症病人的认知功能与其性激素水平的相关有统计学意义，男性病人的神经心理测验成绩与T呈正相关，女性病人的神经心理测验成绩与〓呈正相关。

Species-pairs were positive correlation,including 10 species-pairs were higher significant positive correlation and 24 speciespairs were significant positive correlation, and 263 species-pairs were negative correlation, including 8 species-pairs were higher significant negative correlation and 28 species-pairs were significant negative correlation, which were tested by Spearman＇ s rank correlation coefficient.

正负相关比为0.7643，显著种对占总对数的15.05%，群落优势种种间多呈不显著关联。2）按照31个建群种和优势种对环境的适应方式和主导生态因素，它们被划分为2个生态种组：芦苇组和早熟禾组。3）关帝山撂荒地植物群落以退耕还林的先锋物种为主，表明植物群落处于森林植被恢复的初期演替阶段。

The percentage of collagen type ⅱ and alcian blue positive stained rgcs decreased with increasing passage number. only the roundish cells of the 5th passage retained positive for collagen typeⅱ, and alcian blue staining of 3rd passage was negative, while α sma positive stained rgcs increased gradually.

随着传代次数的增加，阿尔新兰和ⅱ型胶原阳性染色的细胞比例迅速下降，第3代以后的rgcs阿尔新兰染色均为阴性，第5代rgcs也仅有圆形细胞仍保持了ⅱ型胶原阳性染色，而α sma阳性染色细胞的比例则不断增加。

In the first part, we discuss the properties of solutions of (0.1) system with dif-ferent diffusion coefficient and the second boundary condition. The stability of non-negative constant solutions is given, some prior-estimate of the positive steaystateare proved by using the maximum principle and lower-upper solutions, the non-existence of non-constant positive solution, the global exitence of non-constant pos-itive solution and bifurcation solution of non-constant positive steady-states areobtained.

第一章讨论了系统(0.1)在扩散系数不相同的情况下非负常数解的稳定性，运用极值原理，上下解方法确定了系统(0.1)正平衡态解的一些先验估计，然后讨论了非常数解的不存在性，非常数正平衡态解的全局存在性及非常数正平衡态的分歧解。

Besides, I also find that firms report negative earnings for fiscal year, which have less current and future earnings response coefficient than report positive earnings, and firms report negative cash flows from operating for fiscal year, which have less current cash flow response coefficient than report positive cash flows. Indicating that firms report negative earnings or cash flow, because losses are more transitory and which stock prices less information but which future cash flow response coefficient more than report positive cash flows. Inference of this study because cash flow have substance effect, so when firms have negative cash flows investor more care about it, which have more cash flow response coefficient, and further find while distinguishing the degree of sophisiticated investor, investor the sophisiticated degree proportion is higher. Because they know information of the earnings, firms have more degree of shareholder sophistication for fiscal year, which have more current and future earnings response coefficient than which have less.

此外，本文也发现报导损失之公司，其当期及未来盈余反应系数较报导利润之公司低，以及公司报导营业活动之现金流量为负时其当期营业活动之现金流量反应系数低於报导营业活动之现金流量为正之公司，显示公司报导损失或营业活动之现金流量为负时，因为通常都是暂时性的故其股票报酬的资讯性较低，不过其未来营业活动之现金流量反应系数高於报导营业活动之现金流量为正之公司，本研究推论因为现金流量是有实质的效果，所以当现金流量为负值时投资人应该会比较关注，所以其反应系数较高，而进一步发现当区分投资人之精明程度时，投资人精明程度比重较高，因其会辨识盈余资讯而认为公司进行损益平稳化会增加其资讯内涵，故当期及未来盈余反应系数相较於投资人精明程度较低者高。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。