压力不足

Ferroconcrete circle form is the main pressure pipelines type mostly adopted in built power stations from 1970"s to 1980"s in our country. During long running process, there are many factors such as design faults, bad materials, manufacturing deficiencies, improper constructions, environment factors, function changed, load increase, material aging, damage and so on which lead to all kinds of problems containing deficiency, crack, lack of strength and structure destroyed .

在我国七八十年代建成的电站压力管道，大多采用的是钢筋混凝土圆形结构，在长期运行过程中由于其设计失误、材质恶劣、制作偏差、施工不当、环境因素、功能改变和荷载增加等因素及材质本身的老化、损害等而导致钢筋混凝土压力管道产生各种各样的缺陷、损伤、裂缝过大、承载力不足或结构破坏等问题。

At this pace is accelerating, increasingly competitive modern city, our lives filled with a variety of pressures, the work we have to keep learning every day and charge too much pressure from all directions, then, emotional low, listlessness, lack of sleep, inexplicable irritable.

在这个节奏不断加快，竞争日渐激烈的现代化都市，我们的生活充斥着各种各样的压力，工作上我们要每天不断地学习与充电，太多太多的压力来自四面八方，于是，情绪低落、无精打采、睡眠不足、莫名的烦燥。

Simulative results and analysis has shown that DFO improved on hot spot problem in CAN, can achieve the purpose of minimum global query latency and maximal transmit overload balance.

仿真结果表明：DFO算法改进了CAN中局部转发压力过高的不足，达到整体时延最低和节点压力最大平衡的目的。

Main research contents as follows:(1) The four destruction models and respective stability analysis methods are discribed in this paper, whose working mechnism and calculating methods are given. In addition, some defects of every method are also discussed ;(2) On the basis of traditional active soil pressure method and expirical siol pressure method , the calculating model of the laternal earth pressure which is a tetragon with the largest value in the center side is addressed.

主要工作如下：(1)本文给出了复合土钉墙的稳定性分析方法，该方法介绍了复合土钉墙的四种破坏类型，分析了每种破坏类型的受力机理，并给出了相应的计算方法和计算方法中的一些不足；(2)在传统的主动土压力和经验土压力的基础上，建立了土钉墙中间大、上下小的四边形状分布的侧向土压力的计算模式。

In addition, some defects of every method are also discussed ;(2) On the basis of traditional active soil pressure method and expirical siol pressure method , the calculating model of the laternal earth pressure which is a tetragon with the largest value in the center side is addressed.

主要工作如下：（1）本文给出了复合土钉墙的稳定性分析方法，该方法介绍了复合土钉墙的四种破坏类型，分析了每种破坏类型的受力机理，并给出了相应的计算方法和计算方法中的一些不足；（2）在传统的主动土压力和经验土压力的基础上，建立了土钉墙中间大、上下小的四边形状分布的侧向土压力的计算模式。

One type of students are those who are short of study motion. This type of students can be divided into four situation. That is the contradiction between demands and realities, the repound after pressure, they have ever been defeated, they negate the value of study, Another type of students are those whose knowledge is not enough. Their previous knowledge can't catch up with the teaching demands of a vocational school. The third type of students are those who have no suitable study methods and good learning habits. The fourth type of students are the synthesis of all above.

其次从学生主观角度分析，其化学学习障碍产生的原因可分为四种类型：一是学习动力不足，这类学生又可大致分为四种情况，即需求的倒错、压力的反弹、心理曾经受挫和否定学习的价值；二是先备知识不足，表现在其先备知识与中专教学要求的不相称上；三是学习方法和习惯不好；四是综合体现上述三种原因。

There are many complex factors, such as age, environmental, social, psychological, personal factor and human diseases, etc., affecting the development of insomnia symptoms. Insomnia is one kind of neurology/psychiatry diseases, due to brain overstrains and stresses in the nerve center system, in Western Medicine, while there are approximately two factors that can cause the insomnia symptoms, including the anti-pathogenic- qi deficiency and the pathogenic-factors invasion in Traditional Chinese Medicine.

失眠的原因有年龄、环境、社会心理、身体疾病等繁多复杂因素所造成，西医学认为失眠是由大脑压力所造成脑与神经所支配命令的自律神经系统降低或失去其调整身体功能作用之中枢神经系统失调的疾病症状，然而，中医学的失眠病因病机可概括为正虚、邪扰两种，其中正气虚涉及心、脾、肝、胆、肾、胃等脏腑，邪气扰则以痰、热、火、饮、食为多，失眠的病因主要有脏腑虚损、精血不足、神魂失养、七情所伤、内邪滞扰、外邪所感、思虑劳倦太过或暴受惊恐，亦可因禀赋不足、房劳久病或年迈体虚等所致；失眠的主要病机在於阴阳及气血失和，脏腑功能失调，进而神明被扰、神不安舍所致。

Minimum holding pressure: based on the correct switch point, the pressurewhen the parts start to be empty .

最低保压压力：在准确的转压点基础上，给予一定的保压压力，当产品刚出现充模不足时的保压压力。

Minimum holding pressure: based on the correct switch point, the pressurewhen the parts start to be empty .

最低保压压力：在精确的转压点基础上，给予一定的保压压力，当产品刚呈现充模不足时的保压压力。

The following are main contents studied: A finite element method for Navier-Stokes equation with ALE formulation is considered and by combined with theNewmark method of numerical intergration a pressure correction scheme is obtained for the solution of the FE formulation of N-S equation. Because the incompressibility condition can be satisfied approximately in this scheme, the interpolation functions of elements can be equalorder for the velocity field and pressure field. In the ALE formulation the fluid-solid interaction analysis became a three-field coupling problem of the fluid field, the solid field and the fluid dynamic mesh. The properties and charactiristices of this three-field coupling problem are deeply discussed.

研究的主要内容有：主容器中流体大晃动是一种强非线性问题，文中研究了求解ALE描述的粘性流体N-S方程的有限元方法，以有利于大晃动自由液面的跟踪和流体大晃动中非线性现象的描述；并结合Newmark数值积分法推出了求解ALE型N-S方程的压力修正解法，由于这种解法可以近似满足不可压条件，因此可以采用速度场和压力场等阶插值的有限元离散格式，从而较好地解决了普遍采用的不等阶插值解法中，速度场和压力场数值精度不一致、程序编制不便等的不足。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。