查询词典 periodic

By using comparison principle, the sufficient conditions of this model with global attractivity of infection-free periodic solution and system permanence were obtained.

研究一类具有阶段结构和脉冲免疫的SIR模型，利用比较原理得到此模型无病周期解全局吸引和系统持久的充分条件，并利用数值模拟验证结论。

The persistence, existence, stability and global attractivity of periodic solutions of Lotka-Volterra systems are an important direction of mathematical ecology research. It has been an important topic to give a definite criterion of the properties of a complicated ecological system. Many ecologist and mathematician have paid much attention in this field.

生态系统的持久性、周期解的存在性及稳定性、全局吸引性等问题是数学生态学理论中的一个重要研究内容，对上述问题给出明确的判定准则是数学生态学的一个重要课题，历来受到生态学家与数学家的广泛重视。

Firstly, sufficient conditions are given for permanence and global attractivity of the systems, and some results of Li Chuanrong and Lu Songjian on the periodic systems are generalized to general nonautonomous systems.

首先，我们给出了该系统持久和全局吸引的充分条件，把李传荣和卢松坚关于周期系统的有关工作推广到一般非自治系统；其次，改进了周期情形的有关结果。

C The hearing conservation program must include periodic audiometric testing of those colleagues included in the program and a progressive means of corrective action, namely elimination of hazard, control of hazard, rules, procedures, and training.

听力保护程序必须包括对噪音环境中工作人员进行周期性听力检测，以及矫正活动方法，意即风险的排除、风险的控制、规则、程序、培训。

A commonly observed welding defect characteristically occurs at high-speed welding, such as humping weld. Humping is the periodic occurrence of beadlike protuberances.

但焊接速度提高的同时也更容易产生焊接缺陷，如驼峰焊道，即焊缝金属沿焊接方向上分布严重不均的焊缝成形缺陷。

So our compulsory affirmation is the regulation that upholds a country, we can think more kind go promoting for certain, the country hopes to put on record we also hope to put on record for certain, if if say to be able to be carried,just suggesting, we meet those who if say to be able to have the law more,think do put on record sexual job, is not to lean a simple way that studies e.g. periodic person, we say to put on record to will be checked tomorrow today, not be the way that studies through such people, the rate that accepts possibly to stationmaster will be higher, betterer.

所以我们的义务肯定是维护国家的规定，我们肯定会想更多的方式去促进，国家希望备案我们肯定也希望备案，只不过如果说可以提一点建议的话，我们会认为如果说能够更加有规律的去做备案性的工作，而不是靠一个单纯的比如说周期性人治的方式，咱们今天说备案明天就查了，就不是通过这样人治的方式，可能对站长接受的程度会更高，更好一些。

Applying RQA, we analyse the EMG of biceps brachii muscle and brachioradialis muscle under different loads, point out the percent recurrence of brachioradialis muscle is higher than that of biceps brachii muscle and more periodic.

应用RQA分析了肱二头肌及肱桡肌在不同负重下的肌电信号，发现肱二头肌肌电信号的递归点百分数均比肱肌高，有较强的周期性嵌入。

Applying RQA, we analyse the EMG of biceps brachii muscle and brachioradialis muscle under different loads, point out the percent recurrence of brachioradialis muscle is higher than that of biceps brachii muscle and more periodic.

最近由Eckman等［1］提出的递归图示法（recurrenceplot，RP）以一种简单的图形显示出了其在表征系统动力学特征方面的优点，被证明是一新的非线性分析的有效工具，引起了人们极大的兴趣。

Clinical data showed that periodic alterations of estrogen and progestin in some women patients with catamenial epilepsy might affect seizure susceptibility.

临床资料显示，某些女性癫痫患者体内雌、孕激素的周期性变化可能影响癫痫发作的易感性。

Clinical data showed that periodic alterations of estrogen and progestin in some women patients with catamenial epilepsy might affect seizure susceptibility.

临床资料显示，某些女性水果癫痫患者预防体内雌、孕激素的周期性变化可能影响癫痫发作的易感性。

At least 170 people have been killed in bombings and raids on western and security related targets in recent weeks.

在最近几周针对西方人和安全相关的目标的袭击中至少有170人被炸死。

An injection type shunt hybrid active power filter was analyzed, it can suppress harmonic currents and compensate high capacity reactive power, nevertheless, a sharp boosting on DC-side voltage was found in application. Based on the analyses of the reasons, different solutions was proposed such as adoption of main circuit of multiple performances, the use of hysteretic control method, fore-feed control of reflowing current or direct control on DC-side voltage without a rectifier to supply.

研究一种兼具大容量无功补偿能力的注入式并联混合有源滤波器，并分析其在工程应用中发现的直流侧电压抬升现象及这种现象产生的原因，在此基础上提出从采用多重化主电路结构、滞环控制法、回灌电流前馈控制法和脱离整流电源直接对直流侧电压进行控制等几个方面来抑制直流侧电压抬升的方法。