临界值

Critical value of a given system state variable which cannot be exceeded without endangering power system stability.

系统某状态变量的临界值，超过此值就会破坏系统稳定性。

The more the value of D is closer to the critical value, the more the stability of land use type is worse, and the complexity of land use type is higher; verse vice.

分维值越接近该临界值，该土地利用类型的稳定性越差，复杂程度越高；反之，则该土地利用类型的稳定性较强，复杂程度较强，复杂程度较低。

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 mean ADC value of lymphomatous, metastatic and benign lymph nodes was (0.874±0.17)×10~(-3)mm~2/s,(0.98±0.09)×10~(-3)mm~2/s and (1.20±0.10)×10~(-3)mm~2/s. There was statistically different between benign lymph nodes and other groups (P=0.00). When an ADC value of 1.085×10~(-3)mm~2/s was used as a threshold value for differentiating malignant from benign lymph nodes, the best results were obtained with an sensitivity of 87.8% and specificity of 91.3%. 16 of 18 cases (88.9%) were accurately staged in accordance with clinical staging. For 24 patients after chemotheraphy or radiotheraphy, 4 cases were complete remission and WB-DWI was negative. WB-DWI was positive in 14 of 17 cases with recurrent or remnant tumor. For 3 patients with suspected partial remission, WB-DWI indicated necrosis in 2 cases and inactive in 1 case. Repeated WB-DWI examination was performed in 13 cases, tumors were eradicated in 6 cases, improved in 4, expanded in 2. A new colon carcinoma besides its primary lesion was found in 1 case. The results of WB-DWI were all concordant with other clinical tests.

以ADC值1.085×10~(-3)mm~2／s作为诊断恶性淋巴结病变的临界值，敏感性及特异性分别为87.8％和91.3％。88.9％(16／18)患者WB-DWI检查后分期与临床分期一致。24例淋巴瘤患者放化疗后行WB-DWI检查，4例临床疗效为完全缓解，WB-DWI检查均为阴性，17例临床确认有肿瘤复发及明显残留，WB-DWI显示为阳性的14例，另外3例常规影像评价为部分缓解的患者，WB-DWI检查提示2例病灶以坏死液化为主，1例病灶无明显活性。13例淋巴瘤患者行多次WB-DWI检查，发现6例治疗后病灶消失，4例缓解，1例原发病灶缓解，新出现结肠癌，2例淋巴瘤进展，皆与临床相符。

First, based on the analysis and comparison of wave breaker indices defined by geometric, kinetic as well as dynamic stability, which were verified by observation, the value α, which is equal to H/ by Miche' s result and may be modified by Goda' s results, is suggested as the wave breaking criteria. The applicable values of α for pure waves or wave-current co-existing field are given.

首先，基于对波浪破碎的几何学、运动学及动力学三种指标的分析比较和观测资料的验证，本文提出可以合田良实的结果为基础修正Miche的H／=α值，并提出了适用于纯波及波浪与水流共存时的临界α值。

It shall be shown that the external conditions are noncritical in relation to those assumed for the design (Section 1.2.3.2) of the wind turbine.

必须证实外界条件不是风机设计假定值的临界值（见1.2.3.2章节）。

It shall be shown that the external conditions are noncritical in relation to those ass umed for the design (Section 1.2.3.2) of the wind turbine.

必须证实外界条件不是风机设计假定值的临界值(见 1.2.3.2 章节)。

The combustion of emulsion explosive matrix is nearly relational with the temperature of the environment, the delayed-action time will extend when the non-adiabatic semenov parameter is around the critical value.

其燃烧与环境温度有着密切的关系，当非绝热semenov数处于亚临界和临界值时，爆炸延滞期延长。

A safe region,which is defined according the critical hydrate volume concentrations,is firstly proposed for hydrate slurry,and it can be used to judge if the pipeline can be run safely or not.

通过与其他研究的比较，以临界水合物体积浓度为判断标准定义了一个流动安全区，当管道中的水合物体积浓度小于临界值，可以认为是安全的，相反则认为管道存在水合物堵塞的威胁。

Especially,in setting of the right turn lane,this paper establishes the critical volume models of setting the right turn vehicle phase and the pedestrians phase in separately,and effective proposes the method of calculating the critical value.

尤其是针对设置了右转专用车道情况下，通过设计右转车辆与行人相位分开设置情况下的流量临界模型，提出了设置二者的相位分开设置的临界值的计算方法。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷