临界值

It wasfound that the kinetics formulas of these photo-polymerization systemsdeviated from the normal kinetics formula sharply and there existed acritical concentration of 〓, the reaction rate would descendwhen the concentration of 〓 exceeded it.

我们发现这些光聚合反应的动力学方程与正常的动力学方程偏离较大；并首次报道了当〓的浓度达到某—临界值时，反应速率随着〓浓度的上升反而下降的现象。

This article studies critical initially, which four kinds of straw blow liquir restrain aerobe.

本课题也初步探讨了草类原料四种不同制浆方法产生的废液对好氧微生物抑制作用的临界值范围。

Results The concentration of IL-18 in tubercular pleural effusion group was (1200.34±530.25) pg/ml, while that of the malignant pleural effusion group was (240.40±80.49) pg/ml, the former was significantly higher than the latter (P.01); The analytic result of ROC curve showed that 360 pg/ml IL-18 could be seen as the critical value for diagnosis of the tubercular pleural effusion, whose sensitivity and specificity respectively was 89.2% and 93.5%.

结果 结核性胸腔积液组IL-18的浓度为(1200.34±530.25)pg/ml，恶性胸腔积液组IL-18的浓度为(240.40±80.49)pg/ml，结核性胸腔积液组IL-18的浓度显著高于恶性胸腔积液组(P.01)；ROC曲线分析结果显示IL-18以360pg/ml为诊断结核性胸腔积液的临界值，其敏感度和特异度分别是89.2%和93.5%。

Androgynus was a kind of hyperaccumulator in Cd, with critical value of 50 mg/kg, above which would cause poison in S. androgynus, and even dead when it was up to 800mg/kg; transfer coefficient would decrease with the increase in treated concentrations, which show that plant would protest Cd against transferring to above-grounds and causing poison.

以上结果说明五指山野菜是Cd超积累植物，且50 mg/kg时是五指山野菜正常生长的临界值，高于此浓度，将对其产生毒害，当浓度为800 mg/kg时，植株出现死亡；随处理浓度的增加，转移系数逐渐变小，说明植物在高Cd胁迫下阻止Cd向地上部分转移而产生更严重的毒害。

Also, some patients with chronic hepatitis B have widely fluctuating HBV DNA levels that may vary from undetectable to 2,000,000 IU/ml.117 Thus, serial monitoring of HBV DNA levels is more important than any single arbitrary cutoff value in prognostication and in determining the need for treatment.

而且，许多患有慢性乙型肝炎的患者，HBV DNA水平波动的幅度很大，可从测不出到10'7copies/ml之间变动。因此，为了预测病情和确定是否有治疗需要，对HBV DNA水平的连续检测比任何武断确定的单个临界值更为重要。

The main conclusions of this paper are as follows:(1) When the time is ascertainable, the paper builds two models under no profit and having profit. The conclusion tells us that when the price is different, the adoption strategy and threshold of the leader enterprise and the follower enterprise will change.

研究表明：（1）新技术到来时间确定的情况下，建立了两家企业无利润与存在利润流时的价值模型，结果表明市场产出价格处在不同区域内时领导企业、追随企业的采纳策略和采纳临界值会发生变化。

Assignable cause. Critical value. Ordinary least squareestimate. Process capability index ...

Keywords：可归属原因临界值最小平方法制程能力指标工具汰换工具磨损。

Secondly, by linearizing the system at the unique positive equilibrium solution and analyzing the associated characteristic equation, it is found that the positive equilibrium solution is asymptotically stable when the delay equals to zero and when it is increased to certain critical value, the positive equilibrium solution will loss the stability and a spatially heterohomogeneous periodic solution will bifurcate from this positive equilibrium solution.

通过在系统唯一的正平衡解处线性化系统和分析相应的特征方程，发现在时滞等于零时该正平衡解是渐近稳定的，当时滞逐渐增大到某个临界值时该正平衡解将失去稳定性而且在该平衡解处分支出空间非齐次的周期解。

Based on the theoretical study of the operation of auxiliary impeller , the effects of the interdict

通过对副叶轮的工作过程进行理论研究，补充遮断阻力和运行临界值的影响，使副叶轮的计算方式更具实用价值。

They are therefore approximations and cannot be used for highly critical flow or pressure drop calculations.

因此这些数据只是大致的数据，不能用作高流量临界值或压降估计值。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。