系统发生

Unresponsiveness to an antigen that normally produces an immunological reaction.

抗原性物质antigenicity substance 能刺激机体免疫系统，发生免疫反应的物质。

Through such a study, it is also shown that when the time delay is long enough such that the stability switches of the equilibrium of system halt, the bifurcation branches originated from the critical time delays cannot be surely stable or unstable in the whole solution space, that is, their stability depends on cases.

利用打靶法的数值结果说明了当系统平衡点不再发生稳定性切换时，源自这些临界时滞处的解支的稳定性在整个解空间的稳定性具有不可判定性，这也说明由多尺度法所得高阶近似判定的解支的稳定性事实上只表示解支在局部中心流形上的稳定性，而非在整个解空间中的稳定性。

The results show that supper-harmonic resonance of orders 2, 3, 4 occurs with the second mode of ATP, and that the unsymmetry of motion of ATP is described under wave excitation.

计算结果表明，在波浪激励下系统二阶模态将发生2、3、4倍超谐共振运动，并且揭示了弹性铰接塔平台在波浪作用下振动的不对称性。

Different genes for expansin may be associated with different development stage of roots under upland condition.

在水稻根系发生发育过程中，不同的expansin基因可能参与了旱种条件下不同生育期根系统的发育。

At present, mang hereditary disease and acquired disease are concerned with the functional disorder of UPP.

目前发现的许多遗传性和获得性疾病的发生都与此系统功能失调有关。

Canonical variate analysis is applied to identify a state space model in linear space and state information is extracted.

在CSTR系统上的仿真结果表明，KCVA方法比主元分析法和CVA方法能更灵敏地检测到故障的发生，更有效地监控过程变化。

Vasoactive peptides play major role in regulating systemic and micro- circulation, which greatly influenced the generation and development of cardiovascular diseases.

血管活性肽是大体循环和微循环稳定调节的主要物质基础，对包括以微循环障碍在内的心血管系统疾病的发生和发展具有重大影响。

ABSTRACT In this dissertation, in accordance with two projects from the National Defense Science Industry Committee:"The Laser Doppler Velometer for the Large-value and Wide-frequency-range Standard Negative-step-force"And"The novel kind Laser Vibrometer for vibration transducers calibration"have been studied deeply and systematically.

结合国防科工委85攻关项目："用于大力值宽频带标准力源发生装置中的激光多普勒测速系统"和国防攻关项目："用于加速度传感器复合灵敏度绝对校准的宽频带相位型激光测振仪"的研制。

Taking the professional knowledge of the personnel and the farmers into consideration, and integrating the correlative information of the management of the pests in vegetables, the Decision Support System is possessed of high visuality, facilitative operation and artificial intelligence.

系统针对目前我省害虫治理中存在的问题，总结历年蔬菜害虫发生规律，从发现害虫、鉴定害虫、了解害虫、分析害虫动态和防治害虫等害虫管理的各个环节全方位地向使用者提供蔬菜生产中可能出现的害虫管理问题的决策支持。

Results demonstrate that the MCC develops in a weak baroclinic environment, a 850 hPa horizontal wind shear line with a vortex dominated in the low levels and an anticyclone in upper levels, without barocli...

结果表明，MCC发生在较弱的斜压环境里，对流层低层有明显的天气系统如切变线、中尺度低涡，中层可以没有低压槽参与，高层则出现在反气旋环流里。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐