引起因素

Lots of factors,such as the virus infection, the acarid and dust in the room, the blackbeetle, the tobacco smoke, the air pollution, the chemical stimulation and the like , can trigger bronchial asthma. The contamination of suspending particulates with the diameter less than 2.5 micron in the atmosphere is the main reason that makes mortality ascend,for the contamination can aggravate the hypersusceptibility which embitter more and more people .

支气管哮喘也称哮喘病，病毒感染、室尘螨与蟑螂等变应原触发因素，以及烟草烟雾、空气污染、化学刺激等均可引起发病，大气中直径不足2.5微米的悬浮微粒污染物是导致死亡率上升的因素，微粒污染会加剧人体过敏反应，全球遭受过敏之苦的人数正与日俱增。

Environment of residence was one of very important effects of allergen.

环境因素是引起过敏体质者在人群中比例增加的影响因素之一。

In this case, blood filled the pleural cavity, but atelectasis could also result from filling the chest with air, transudate, lymph, or purulent exudate.

在此图片中可见血性液体充满了整个胸腔，但肺不张还可能是由于胸腔内充满了气体引起，还可能是由于以下因素引起：胸膜有渗出液、淋巴液、脓性渗出液。

For CWR＇s design on high pier bridge, longitudinal additional force caused by temperature should be added to other additional force to check the rail strength and CWR＇s stability.

根据梁轨相互作用原理，建立&轨—梁—墩&有限元模型，计算桥墩温差引起的桥上无缝线路钢轨附加力，研究桥墩温差引起的钢轨附加力的分布规律及其影响因素。

In a database the concept of an example might change along with time which is known as concept drift When the concept drift the classification model built by use of old data is unsuitable for classify new data Therefore concept drift has become a hot issue in data mining in recent years Although many algorithms had been proposed to resolve this problem they can not provide users with the reason of concept drift However a user might be very interested in such rules For example doctors want to find what makes disease change; researchers want to know the reason of the variety of the weather; and decision makers would like to understand why a customer's shopping habit change In this thesis we propose a Concept Drift Rule mining Tree called CDR-Tree to solve this problem CDR-Tree can not only find the rule of concept drift also build the prediction model for both old and new data at the same time

无论在大型资料库或现实生活中，同一资料样本的概念有可能会随著时间的递移而改变，也就是产生所谓的概念漂移。当样本发生概念漂移时，由旧有资料所建构的分类模组将不再适用於预测新获得的资料，因此，近年来概念漂移已成为资料探勘中一项热门的研究议题。虽然已有？多学者提出不同的技术来解决概念漂移的问题，但是这些方法都是利用修正或重建的方式来产生适合新资料的预测模组，并无法提供造成概念漂移的原因。然而对使用者而言，其感兴趣的可能正是这些引起概念漂移的规则，如医生可能想了解引起疾病变化的主因、学者会想要知道气候转变的规则、或是决策者想找出顾客购物习惯改变的因素等。因此，本论文提出概念漂移规则探勘树( Concept Drift Rule mining Tree )，简称CDR-Tree，来解决这个问题。CDR-Tree不但能探测出造成概念漂移的主要原因，亦能同时建立新旧资料的预测模组以供决策者运用使用。

In wireless broadband digital communication, Inter-Symbol Interference caused by time disperse of radio channel is one of main factors that limit bandwidth of communicated information and system performance of communication. In receiver, Orthogonal Frequency Division Multiplexing system can easily cancel ISI and equalize frequency-selective fadings that are both caused by time disperse of radio channel.

在这一系统中，无线信道时延扩展引起的符号间干扰是限制传输性能和信息速率的主要因素之一；而在消除符号间干扰和均衡由无线信道时延扩展引起的频率选择性衰落方面，正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)技术具有明显优势。

Concrete proposals and method are put forward to solve the problem of temperature compensation for vertical gas pipe.

对目前高层住宅建筑燃气立管温度补偿的常用处理方式进行了研究，通过对温差引起的变形长度以及管道受力计算，分析了引起管道发生温差变形不明显的各种因素，提出了具体解决立管温度补偿方式的建议和方法。

By mechanics analysis of ground deformation, this paper makes a systematic research on the affecting factors of ground deformation of shield tunnel and excavation and establishes a predicted model of ground deformation based on neural network. This model is applied to predict actual ground deformation caused by shield tunnel and excavation in Shanghai, Guangzhou, Nanjing etc.

本文以盾构法隧道和基坑为研究对象，通过对地面变形机理的分析，全面系统地从理论上探讨了盾构隧道和基坑引起地面变形的影响因素，建立了基于神经网络的地面变形预测模型，并运用该模型对上海、广州、南京等城市的盾构隧道和基坑工程所引起的地面变形进行了实际预测，获得了令人满意的预测结果。

Problems such as charge injection and clock feedthrough caused by turning off swithes are analyzed and solved in this design. The optimal switch sequence helps eliminate the nonlinearity caused by the charge injection; the addition of dummy switches to sensitive nodes caused by the clock feedthrough can greatly reduce the coupled charge; and the use of high PSRR folded cascode differential input stage can restrain the interference from the power supply. The circuit performance, therefore, has been greatly improved.

设计中分析并解决了因时钟信号引起的制约开关性能的因素：优化的开关时序消除了电荷注入引起的非线性；时钟馈通敏感节点增加虚拟开关抵消了耦合电荷；高PSRR共源共栅折叠式差分输入结构，有效地抑制了来自电源的干扰，改善了电路的性能。

The inorganic composition of DCS in DIP is the key factor resulting in deposition of wood pitch, in which the triglyceride composition is agglomerated and deposited due to the destruction of electrostatic stability, however the fatty acid composition is deposited due to the formation of insoluble soap.

研究结果表明，DCS 中的无机溶解性组分是引起胶体发生沉积的关键因素，树脂中甘油三酯通过破坏静电稳定性引起聚集和沉积，脂肪酸通过反应形成黏性不溶性皂而加剧沉积。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。