| 1. | Study on parasitical natural enemy insect of saperda populnea l
青杨天牛寄生性天敌昆虫初步研究 |
| 2. | Storage : in covered , clean , dry sheds at room temperature , free from parasitical infestations and any kind of foreign smell
贮存：室温下，置于洁净、干燥和密闭的容器中保藏，远离外界污染及不良气味。 |
| 3. | The outdoor parasitical efficiency of t . brontispae was normally 40 % - 50 % and tiptop was 100 % , a . hispinarum was normally 20 % - 30 % and tiptop was 47 %
椰心叶甲啮小蜂的大田寄生率一般为40 % ~ 50 % ，最高可达100 % 。 |
| 4. | Culture of brontispa longissima ( gestro ) and its two parasitical natural enemies , tetrastichus brontispae fer . and asecodes hispinarum have been developed in research
摘要开展对椰心叶甲的饲养及其两种寄生性天敌椰心叶甲啮小蜂和椰甲截脉姬小蜂的培育繁殖研究。 |
| 5. | Occasionally the marks were hidden under tufts of myrtle , which spread into large bushes laden with blossoms , or beneath parasitical lichen . so edmond had to separate the branches or brush away the moss to know where the guide - marks were
这些记号相当有规律，大概是故意留下来的，有几处已被覆盖化一丛丛鲜花盛开着的香桃木底下，或寄生的地衣底下。 |
| 6. | The in - depth analysis of the noise in gilbert mixer including parasitical capacitors , in which the mixer and lna have been connected together and the noise figure of mixer can be expressed explicitly as that of lna
回在包括寄生电容的情况下，对双差分对混频器（ gilbertmixer ）的噪声性能做了深入分析，把混频器和低噪放联系在一起，可像低噪放一样，直观的表达混频器的噪声系数。 |
| 7. | Thirdly , two kinds of the methods to improve the performance of filter stopband has been discussed . these methods are used to cleared up the influence of the parasitical passband . through the simulation and test result shows that these methods " s performance is expected
第三,论了2种对滤波器阻带抑制进行改善的方法,以消除寄生通带的影响,通过仿真和实际制作滤波器的测试结果。 |
| 8. | The character of radar system is restricted by parasitical am . to restrain parasitical am , a low pass filter is used in the if circuit . the result shows that the fmcw detecting range of the radar with the filter is greater than that without
较大的vco寄生调幅对雷达的作用距离有严重影响，对此，本文进行了分析，并提出了一种在中频电路中用滤波电路进行抑制由寄生调幅带来的于扰信号的方法。 |
| 9. | In the whole insect community , the pests that have been defined include 63 species , which hold the 17 . 07 % of whole community . the natural enemies ( including predacity and parasitical enemy ) include 79 species , which hold the 21 . 41 % of the whole community
在整个昆虫群落中，己明确为害虫的有63种，占整个群落的17 . 07 ；天敌(包括捕食性天敌与寄生性天敌) 79种，占整个群落的21 . 41 ；中性昆虫227种，占整个群落的61 . 52 。 |
| 10. | The factors limiting the frequency band of the wide - band amplifier are introduced . through analyzing the effects of the intrinsic parameters and parasitical on the frequency characteristics , a method of improving fr of mosfet by using short channel device and making mosfet work at the saturation region through raising vgs is put forward ; the effects of different kinds of circuit configurations on the frequency characteristics and the junction voltage on the voltage pattern circuit , current pattern circuit and frequency characteristics are analyzed . according to the linear theory of transconductance which is applied in the bit circuit , the current pattern amplifier circuit , current transfer circuit and output circuit which consist of mosfet and the wide - band amplifier composed of them are put forward
介绍了限制宽带放大器频带宽度的因素，通过分析mosfet的本征参数、寄生参数对频率特性的影响，提出了采用短沟器件、使mosfet工作在饱和区、抬高栅源电压等提高mosfet特征频率的方法；分析了不同电路组态对放大器频率特性的影响、节点电压对电压模电路、电流模电路频率特性的不同影响，根据应用于双极晶体管电路的跨导线性原理，提出了采用mosfet构成的电流模放大电路、电流传输电路、输出电路以及由它们所组成的宽带放大器，获得了良好的频率响应。 |
