有效质量

Department of Chemical Pharmacology, Capital University of Medical Science, Beijing 100054, ChinaAbstract: A reversedphase high performance liquid chromatographic method was developed for the simultaneous quantitative determination of caffeine, dapsone and chlorzoxazone. The operation was carried out on a C18 column (250 mmX4.6 mm i.d., 5.0 μm) with the mobile phase of acetonitrilephosphate buffer including 0.02 mol/L KH2PO4 and 0.02 mol/L (C2H53N, pH 6.5(25:75 in volume ratio).

用反相高效液相色谱同时测定血清中咖啡因、氨苯砜、氯唑沙宗探针药物的质量浓度，以乙腈磷酸盐缓冲体系(含 0.02 mol/L的磷酸二氢钾和0.02 mol/L的三乙胺，pH 6.5)(体积比为25：75)为流动相，以安替比林为内标，经C18柱(250 mmX4.6 mm i.d。， 5.0 μm)分离，紫外检测器检测，使3种探针药物得到较好的分离，并且在有效血药浓度范围内线性良好。

By the law of conservation of mass, the principle of effective stress and the Darcys law as well as the equilibrium differential equations, a coupled mathematic model that included the terms of source and sink, and its corresponding direct coupled FEA model, for the analysis of groundwater seepage and stress were developed.

其次根据土体的平衡微分方程、质量守恒定律、有效应力原理以及达西定律建立了考虑源汇项的渗流场与应力场耦合数学模型，并且提出了直接耦合有限元计算方法。

Regard derv as the crucial part of engine, turbine supercharger can improve engine power performance effectively, its are heterogeneous material solders quality is right overall function is having conclusive effect.

作为柴油发动机的关键部件，涡轮增压器能有效改善发动机动力性能，其异种材料焊接质量对整机性能有着决定性影响。

Environmental pollution not only brings huge economic damage, but also influences people's living quality significately. If we can't control the pollution efficientely, it will affect our descents'happy life and existence.

环境污染不仅给人类带来巨大的经济损失，而且严重影响人们的生活质量，如果不加以有效的控制还会影响到人类子孙后代的幸福生活甚至生存。

Putting human nursing into the nursing work of pediatric section step by step, not only can give an impetus to discases convalescence effectively, but also make the distance shorter between doctors and nurses with the patients, and can improve satisfactory degree of the parents.

把&以人为本&的人文护理理念融入到儿科护理工作中，用爱心和责任心关爱每一位患儿，实行人道的、个性化的护理服务，不断提高护理质量，能够有效促进患儿疾病康复，融恰护患关系，提高家长满意度。

Carry Cheng integrated hotel and airline ticket message, for the client more sufficient and effective have hotel and airline ticket engage the service that provides high quality, in the meantime, carry what Cheng earlies childhood to serve inside for including traffic and hotel to go vacationing product, provide tourist guide service below certain condition.

携程综合酒店与机票信息，为客户更充分有效进行酒店与机票的预订提供高质量的服务，同时，携程还提供包括交通与酒店服务在内的度假产品，并在一定条件下提供导游服务。

The system can effetely improve the welding speed and welding quality and can induce cost.

系统结构简便，成本较低，可有效提高焊接速度和焊接质量。

By designing of active electrodes, the quality of the signal is improved effectively.

本设计采用有源电极的设计方法有效地提高了信号的质量。

E . ratio of resin column to its diameter , flow rate of the diesel fuel samples on adsorption , and the effects of composition , flow rate of the eluant on desorption were studied . The suitable methods were also established about extraction , elution and regeneration in the resin column.

树脂吸附碱性氮吡啶的动力学和热力学研究表明：温度在288.15K～298.15K之间，树脂对吡啶的吸附过程动力学机理模型为缩核模型，吡啶溶液质量浓度为50mg/L时，主要受液膜扩散的控制，其有效扩散系数为K_f

Maintenance of overall quality control system in factory.

负责维护公司质量控制系统的有效运转。

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。