临界区

When thecohesion and angle of internal friction is fixed ,the layer failure area becomessmaller with increase of shocrete layer's thickness.also the shotcrete layer has acritical thicknesswith the change of cohesion and angle of internal friction ofshotcrete'sinterface.

初喷接触面粘聚力和摩擦角强度一定时候，初喷破坏区随初喷厚度的增加而减少；接触面强度变化时，初喷存在一临界厚度；初喷破坏区主要集中在节理与洞周的相交处。

The conclusions show that with γP0 increasing the nonlinear dispersion curves shift to the negative region of δ,the upper branch of the curve will form a ring when γP0 exceeds a critical value,while the anomalous dispersion region of group velocity dispersion induced by fiber Bragg grating vanishes,group velocity dispersion becomes only one normal dispersion region.

结果表明：随着βg2的增加，非线性色散曲线的上、下两支向δ的负值区移动，当超过某一临界值时，曲线上支开始形成环，这时光纤光栅引起的群速度色散中的反常色散区消失，全部变成正常色散。

In near-critical pressure region DNB (Department from Nucleate Boiling) is the main mechanism of heat transfer deterioration.

近临界压力区的实验表明，在该压力区主要发生第一类传热恶化。

These data suggest that newborn neurons in adult "critical-period" songbirds are originated only from the ventricular zone of telencephalon and distributed mainly in the NCM, and that they are functional neurons with typical features of mature neurons.

本实验的结果表明，成年"临界型"鸣禽端脑中的新生神经元可能起源于端脑室带区，大量新生神经元主要分布于NCM，到达目的脑区的新生神经元已经发育成熟并具有功能神经元的特征。

As the Coulomb friction of the damper is increased, the vibration amplitude of the rotor system is decreased near the undamped critical speeds, but is increased in a range between the first and the second undamped critical speeds.

随着磁流变液阻尼器的库仑阻尼力的增大，支承在磁流变液阻尼器上的转子系统在无阻尼临界转速处振幅明显下降，但在两阶无阻尼临界转速之间的一定转速区振幅反而增加。

In Near-critical pressure region, critical quality and minimum heat transfer coefficient of post-CHF in inclined tube is less than vertical upflow tube.

在近临界压力区，倾斜管的临界干度和最小传热系数小于垂直上升管。

This project was conducted starting with the three interrelated subjects the structural characteristics of desertification landscapes in different bioclimatic zones, desertification driving factors and their function mechanism, and the dynamic model of landscape space for the occurrence and development of desertification in representative desertification regions and on the basis of in-depth studies of the relations between landscape structural characteristics and processes of desertification and their stability; the driving force of different time-space scales of desertification and their proportion, manifestation form, and action mechanism in the desertification processes; and the establishment of threshold conditions for the surface wind erosion and has achieved important progress in the definition of desertification conception

本课题从三个相互联系的专题（即不同生物气候区荒漠化景观的结构特征、荒漠化驱动因素及其作用机理、典型荒漠化地区荒漠化发生与发展的景观空间动力学模型）入手，在深入研究荒漠化景观结构特征与过程的关系及其稳定性，不同时空尺度的荒漠化过程驱动力及其在荒漠化过程中所占比重、表现形式及作用机制，地表风蚀临界条件的确定等内容的基础上，虽未建立荒漠化景观空间动力学模型，但在沙漠化概念，末次间冰期以来沙漠化过程时间序列和特征冷暖时期沙漠、沙地空间分布格局，现代沙漠化过程中自然因素和人文因素的作用、贡献率、沙漠化土地对气候的反馈作用以及风蚀临界值，沙粒跃移轨迹参数和能量分布，我国沙漠化防治思路和对策，沙尘暴区划和沙尘暴指数等方面取得了重要进展。

The relationship of slope and upslope drainage area of the study area is S = 0.074 A-0.1895, and the gully initiation process is an interaction process of hydrological erosion, melt erosion and landslide erosion, the initiation threshold is increased by the biomass.

研究所得的切沟发育临界地形条件为S = 0.074 A-0.1895，研究区切沟发育的过程是受水力侵蚀、冻融侵蚀和重力侵蚀的交互影响的过程，而沟头植被覆盖的增大会导致切沟发育临界条件的增大。

Distinguishing from the former researches about CR service communication interruption, only spectrum handoff times exceed a certain number, communication interruption will occur. This strategy can reduce the COP of CR services.(3) Some coexistence issues between WRAN and DTV system are studiedFirstly, the network architecture, system parameters, and self-coexistence of Wireless Regional Area Network are investigated, and convergent performances among overlapping Base Station are simulated and validated. Then, a simple coexistent scenario between WRAN and Digital TV is designed to analyze the interference from WRAN BS to DTV receiver.

3研究了WRAN和DTV系统共存时的若干问题首先对无线区域网(Wireless Regional Area Network，WRAN)本身网络结构、系统参数和自共存机制进行了研究，仿真验证了WRAN重叠覆盖区基站(Base Station，BS)之间同步的收敛性能；接着设计了一种分析WRAN BS干扰数字电视(Digital TV，DTV)接收机的共存场景，通过研究发现了一些干扰控制的临界值，这些临界值对于WRAN的设计和部署具有指导性意义。

This analytical approach shows that, as increasing the wear flat of indenter, the maximum indentation force needed to develop critical plastic zone increases and its corresponding critical penetration depth also increases slightly, Note that the effect of wear flat will affect rock fracture behavior. In addition, regarding the simulation of the effect of doubled-indenters, result shows that two adjacent indenters may interact each other as reaching the transient/critical relative space between indenters of 2~3. It dicpicts that a proper spacing arrangement between indenters may enhance a efficient mechanical cutting due to the less required maximum indentation force and energy dissipation.

由数值模拟之结果得知，当楔尖磨耗增加时，岩材产生脆性破坏之初裂贯切力随之增加，而其对应之临界贯入深度则亦微幅增加，故磨耗效应确会干扰岩材脆性破坏机制之形成；而由双刀效应之模拟，可知两贯切刀楔互制影响之破坏裂缝生、衍行为，当双刀相对刀距为时，岩材之破坏特徵有明显变化，即定义此为临界相对刀距，并探讨其产生脆性破坏所需初裂贯切力之变动范围及应力重叠区，由此得知适当之刀距安排将有助於减少能量之耗损。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。