入侵

In buffer zone, there were 14 invasive alien plant species out of 62 investigated plant species, accounted for 22.58%t of total plant species. The comprehensive values of dominance of Pliea microphylla, Ageratum conyzoides and Wedelia trilobata were larger than that of other plant species.

在缓冲区样方内共调查到62种杂草，其中外来入侵植物14种，占植物总数的22.58%，外来入侵植物小叶冷水花、胜红蓟和三裂蟛蜞菊Wedelia trilobata的优势度综合值最大。

This kind of method not only can identify more intact intrusion process,but also can evaluate the correlation degree of the intrusion process and result of the in- trusion process.

1引宫 目前的入侵检测系统主要注重对单个的入侵事件或异常状态进行检测lJ，当检测到入侵事件或异常状态时，就产生相应的告普信息。

The procedure, from budding to grow up, is a significant difference in every different land use type. It's very difficult to invade into the natural forest without any disturbance; For the sake of failure forestation and reclamation, L. lucocephalla and intolerant spices will invade into mixed woodland, and it will be a new dominant after competition finally; They has a high probability for invasion a..nd spread at abandon rural and graze land. The spread area of L.

种子萌芽到成株的过程中，因土地利用类型不同有显著差异，未经干扰之天然林银合欢无法入侵；次生林地由於造林失败或开垦之原因，银合欢与其他阳性树种一起入侵，经过生长竞争后，银合欢会逐渐成为优势树种；而休耕之裸露地或停止放牧之草生地，银合欢之入侵及扩散机率最大。

A nationwide investigation has also been carried out on species from abroad, and action has been taken to root out the most harmful and noxious of such species in 100 counties in ten provinces, enhancing the public awareness and people's capacity to guard against the intrusion of foreign species.

开展了全国外来入侵物种调查，针对危害较大的主要外来入侵生物开展了&十省百县&灭毒除害行动，提高了公众防止外来入侵生物的意识和能力。

At a certain range, habitat loss and its spatial structure can benefit the control of the epidemic disease, which indicates the possibility of using human disturbance in habitat as a potential epidemic-control method in conservation.(6) Not only the quantity of habitat loss but also the spatial correlations of patch types caused by nonrandom habitat loss affect the invasion and transmission of disease. More fragmented landscape (high amount of habitat loss, low clustering of lost patches) hinders the parasitic infection, which also indicates that whether the spatial heterogeneity benefits or hinders the invasion is dependent on the considered ecological process.(7) Two components of the spatial heterogeneity (the amount and spatial autocorrelation of the lost habitat) form a trade-off in determining the host-parasite dynamics.(8) Within a certain range of habitat loss, host can counterbalance the positive and negative effects, and shows a rising tendency.(9) The epidemic is more likely to break out in the prey-predator system if only a small amount of habitat loss.(10) A highly aggregated distribution of species is a common behavioral strategy when dealing with habitat loss or other environmental stresses.(11) The parasite-host/prey-predator eco-epidemiological systems have the similar mechanism with the intraguild predation systems, and the predator acts as the intraguild predation, the infected prey acts as intraguild prey, and the susceptible prey acts as shared resource.(12) Species at the highest trophic level are no longer affected the most by habitat loss, which depend not only on the biological mechanism but also on the external environmental disturbances.

随着邻体数目的增加，病毒的感染力度变得更大而且在空间上形成聚集的波形；(5)生境破坏及其空间结构在一定范围内有利于疾病的控制，这暗示人为对生境的干扰可作为疾病控制的一个潜在方法；(6)生境破坏的数量以及不同类型生境的空间分布格局都显著地影响了寄生病毒的入侵和传播，生境破碎化程度越高(高丧失斑块的数量或低聚集程度)，将越有害于病毒的入侵和传播，这暗示了空间异质性是否有益于物种的入侵依赖于所考虑的生态过程；(7)由生境破坏引起的空间异质性的两个组分之间存在负偶联关系trade-off(8在适度的生境破坏范围内，宿主种群能够平衡生境破坏带来的正负两种效应并呈现增长趋势；(9)在捕食-食饵系统中，寄生感染病毒极有可能在生境破坏量较低时爆发；(10)物种在面临生境破坏或者其它环境压力时表现出更高的聚集分布策略；(11)寄生-宿主/食饵-捕食生态传染病系统与共位捕食食物网结构具有相似的生物机制，其中捕食者扮演共位捕食者的角色，已感染食饵作为共位食饵，易感染食饵扮作共同消耗的资源；(12)位于最高营养级水平的种群对生境破坏的响应不一定是最敏感的，这不仅依赖于内在的生物机制同时也依赖于外在的环境干扰。

From research,It is known that the flux of single-phase transformer would offset and exciting current of single-phase transformer would be distorted under DC current inrushing.

直流电流通过两个Y0连接的变压器中性点侵入电力系统，故针对三相三柱变压器直流入侵情况建立了直流入侵下的三相三柱变压器的电路模型和相应的方程，结合三柱磁路的麦克斯韦方程和非线性的B—H曲线方程，利用数字迭代法，在MATLAB环境下编程计算了三相三柱变压器直流入侵下的变压器励磁电流和谐波特征。

Nowadays, distributed intrusion detection system research based on the technology of agent and neural network becomes hotspot, software agent technology is considered as a very tool to develop intrusion detection system, especially its characteristic of Autonomy, Social Ability and Adaptability, and neural network technology gains more and more focus in respect that its pre-estimation to unknown network activities.

目前，基于Agent和神经网络技术的分布式入侵检测系统的研究成为业界热点，软件Agent技术因其所具有的良好的自治性、社会性、适应性，被视为在入侵检测系统中极为有用的技术之一，而神经网络技术则因其对未知网络行为的预判性，在入侵检测系统领域得到越来越多的关注。

A data sharing and cooperative access control policy model aiming at the weakness of collaboration and self-security in DIDS(Distributed Intrusion Detection System) is presented.

针对分布式入侵检测系统(DIDS：Distributed Intrusion Detection System)面临的协作和自身安全问题，提出了一个分布式入侵检测系统和多组件入侵检测系统间的数据共享策略和合作访问控制策略模型。

Even before Tara had gathered all the code-slingers and chip-jocks and various geeks ( from day one they'd been called the Geek Squad) she felt she needed-in fact, even before there was really any useful information to hack into-their own system had been penetrated.

在塔拉把所有的攻击代码、芯片高手和各种奇客（刚开始他们被称为奇客特工组）聚集起来之前，她觉得她需要入侵-事实上，在他们没有任何真正有用的信息值得被入侵之前，他们的系统就被入侵了。

Studies on capacity of asexual reproduction of invasive species under disturbed conditions can help us to understand their establishment potential.

研究入侵植物对入侵生境中本地植物物种的化感作用，则有助于了解其成功入侵的化学生态学机理。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。