查询词典 duration

Firstly, on the basis of defining the characteristics of project and reviewing the mathematical models for RCPSP, we constructed the mathematical model for RCPSP under the condition that there is non-fixed duration and splittable tasks in project; In order to solve above model, we emphatically discussed the basic principle of the swarm intelligence algorithm--the particle swarm optimization algorithm as well as improvement research for current algorithm, and then proposed a new improved particle swarm optimization algorithm and analyzed its application process in the resource-constrained project scheduling problem; Lastly, in order to confirm the validity of the model and the algorithm, we took an experiment based on 108 instances that produced by problem instance generator which was developed by our team.

首先，在对RCPSP项目特征进行界定以及对项目进度优化模型回顾的基础之上，构建了基于活动工期不固定、任务可拆分特征的RCPSP的数学模型；为了求解上述模型，本文详细阐述粒子群优化算法(Particle Swarm Optimization，PSO)的基本原理以及当前对其改进的研究成果，提出了一种新的改进PSO算法，并对其在RCPSP的应用过程进行了设计；最后，为了检验模型的有效性及算法的优越性，基于梯队内部开发的案例生成器生成的108个算例，进行了仿真试验。

Project scheduling;; resources constrained;; non-fixed duration;; splittable tasks;; particle swarm optimization algorithm

论文导师单汨源，论文学位硕士，论文专业管理科学与工程论文单位湖南大学，点击次数 1，论文页数 73页File Size1553K

However, duration of flowering and plant height should be considered in selecting branch height.

但是，在选择分枝高度时，必须兼顾株高和花期天数。

He rode up to the station with the STS-119 crew, his third flight, in March to begin his long-duration stay as a flight engineer on the Expedition 18, 19 and 20 crews.

他随STS-119机组抵达空间站，他的第三次飞行，在三月开始最为远征18，19，20的飞行工程师。

Sunita Williams, the International Space Station's Expedition 14 and Expedition 15 flight engineer, broke the record for the longest duration single spaceflight by a woman, spending 195 consecutive days in orbit.

国际空间站远征14和15计划的随机工程师Sunita Williams打破了女性单次航天连续时间的纪录，在轨工作195天。

The influence of electrical energy generation and Effective Duration of Power Supply of the two exciting methods on constant current load was investigat...

结果表明，脉冲激励可获得更多的电能，适合于较大负载的工作场合。

Materials and Methods: In Experiment 1, magnetoencephalographic responses were recorded in ten subjects to 25~125ms equiprobable paradigm (25-50-75-100-125 ms tones), 50~150ms equiprobable paradigm (50-75-100-125-150 ms tones), and single-tone paradigms of 25-ms or 50-ms duration.

实验二为行为反应任务。

Totally enclosed switchgear and space footprint is small, not to the house-style 110; equipment, safe and reliable operation; be able to properly resolve the high pressure under the B, electrostatic induction, corona and interference protection of the environment; maintenance workload of the small , the overhaul cycle is long, install a short duration.

全封闭组合电器占用面积和空间小，均不到屋外式的110；设备运行安全可靠；能妥善解决超高压下B的静电感应、电晕干扰等环境保护问题；维护工作量小，检修周期长、安装工期短。

Baseline demographic, clinical and virological characteristics as well as duration of follow-up were similar between treatment groups. The 6 and 12-month rates of HBV DNA undetectability were 47% and 66% in the ADV mono group and 49% and 64% in the combo group, respectively.

用药后随访长度和地区，病情以及病毒特性在试验组中都相差不多。6个月和12个月的HBV DNA检测不到在47%和66%的ADV单独治疗组中呈现，对照联合用药组为49%和64%

A double entry visa is valid for 3 to 6 months with duration of each stay 30 days.

两次入 境签证有效期一般为三至六个月，每次停留期为30天。

Finally it offers the analysis of the fault-tolerance system as well as its test verification.

这样，运行于空间环境中的系统的设计目标就是在保证系统实时性

However, it is still difficult to find out the real reason of the increase of the keratinized gingiva during the orthodontic extrusion whether it is due to the proliferation of the gingival tissue or to its elastic nature, that is because the proliferation of the fibroblasts as well as the connective tissue changes in volume and the intra-fibers spaces were all immeasurable in most of the studies.

然而，仍然难以找到真正的原因增加的角化牙龈在正畸挤压它是否是由于扩散的牙龈组织或其弹性性质，这是因为增殖的成纤维细胞以及作为结缔组织的变化量和内部纤维空格都是不可估量的，大多数的研究。