正

By the priori estimates and degree theory on the positive cone, we obtain some conditions on the existence and non-existence of positive solution, at the same time, we also discussed the properties of the positive solution.

利用先验估计和正锥上的度理论，给出了正解存在的条件，同时，也讨论正解的一些性质。

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。

When thepolynomial has at least two simple real roots,sequences of critical values of timedelays corresponding to each positive root can be derived.

而当该多项式有二个及二个以上的简单正根时，稳定性切换次数主要取决于两方面：一是该多项式的正根的个数，二是该多项式的每个正根对应的临界时滞序列中相邻两项差的大小关系来确定。

Bromooctane was synthesized from potassium bromide(by-product of synthesizing 2-hydroxy-4-octyloxybenzophenone) and n- octanol using concentrated sulfuric acid as a catalyst.

以生产2-羟基-4-正辛氧基二苯甲酮的副产物溴化钾和正辛醇为原料，浓硫酸为催化剂，合成了溴代正辛烷。

The Gaoshawo provenience showed a better growth status in plain region by comparing with the Hangjinqi provenience of the seedling physiological characterization and the medicinal composition content of the annual root.

对一年生直播甘草的分析表明，主根长度与甘草苷含量达到显著正相关水平，根重与甘草酸和甘草苷含量均呈一定程度的正相关；甘草苷含量与甘草酸含量呈极显著正相关关系，说明甘草酸和甘草苷的积累速度具有协同性。

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。

Charlie:Lola,I've given three Tigers their bedtime drink and now they are sleepily snoozing.And I've watched a lion gobble my toothbrush and now he's zizzing on the bath mat and I've shooed Whales down the plug hole and now they are all woozy and "woozing",and lola even the dancing Dogs are "pooped"after their pyjama party

查理：劳拉，我已经给三只老虎他们的睡前茶了，现在他们正在打着呼噜睡得正香呢，我看到嚼我牙刷的狮子正甜甜在我们浴室的地毯上睡觉呢，我已经把鲸鱼赶到出水口，他们也都在睡觉呢，并且，劳拉，那些跳舞狗正都在睡衣晚会之后呼呼的大睡呢。

The main difference of two strategies lies in grade 3 and the grade 4 and there is no difference in the grade land the grade 2; there is the obvious positive correlation between sex and the experimental design, and there isnt obvious correlation between sex and the elementary knowledge; the Spearman rank correlation coefficient r_s=

梯度指导策略与突击强化策略的教学效果的主要区别在于梯度3、梯度4的得分，在梯度1、梯度2上基本无差异；性别与实验设计有明显的正相关，性别与基础知识无明显的正相关；生物基础知识与实验设计成绩的Spearman等级相关系数，r_s=0.443，0.4＜r_s＜0.6，即学生的生物基础知识与实验设计成绩呈中等正相关。

In recent years, Feng Kang has advanced a more natural and direct redu-ction, i. e. the reduction via Green's formula and Green's function.

近年来冯康又提出一种更自然而直接的归化，即从Green公式及Green函数出发将微分方程边值问题化为边界上的含有广义函数意义下发散积分有限部分的奇异积分方程，这种归化在各种边界归化中占有特殊地位，被称为正则边界归化，本文将这一理论应用于重调和椭圆边值问题，研究了其正则归化的性质，并通过利用Green函数、Fourier分析及复变函数论方法等不同途径求出了在上半平面、单位圆内部、单位圆外部三种区域的Poisson积分公式及正则积分方程，其离散化可用于实际计算。

Last we obtain globally asymptotically stability of boundary equilibrium by applying locally asymptotically stability and attractiveness and persistence by using uniform repeller theorem.

在第二章中研究了一类具有时滞的捕食与被捕食系统，分析了系统的正不变集，运用了特征值理论得到了边界平衡点性质，当时滞很小时，得到了系统在正平衡点局部渐近稳定的充分条件，以及当T增加到T_0时，系统在正平衡点附近产生Hopf分支的充分条件；利用局部渐近稳定性加吸引性得到了边界平衡点全局渐近稳定性的充分条件，且应用一致排斥定理得到了种群持久生存的条件。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。