查询词典 negative

The opened magnetic circuit is composed as tow NdFeB permanent magnets and a top plate without U-yoke. After take analyzed deeply for the opened magnet circuit with FEMM (Finite Element Method Magnetics) we find out the field distributing that is separated into three sections . One is the main area what we called as positive field section. Beside the main field there are tow areas that are called the inverted field sections. Loudspeaker arise a very serious distortion when the voice coil moving into inverted field areas. The direction of induced current in the coil part of entered inverted field area is same with the current driving into loudspeaker so that total currents increas largely and heat increase rapidly. With more coils moving into inverted area the voice coil will take on negative inductance properties. It is the main reason that voice coil is burned by heating with increasing current due to arise negative inductance. So opened magnetic circuit is not suitable for the woofers in which the voice coil have wider displacement range. When using this kind magnetic circuit design, the voice coil moving range should be less than the range of positive field to avoid loudspeaker arise serious distortion and heating. Even though voice coil moving range is in the positive area, loudspeaker will still arise more distortion because the field distribution is very cliffy at tow sides of the positive area and full range of magnetic field distribution is not parallel that will arise distortion. Base on above reasons, opened magnetic circuit is not an ideal magnetic circuit for low-frequency loudspeakers. But it can be used in mid-range or high-frequency productions.

开式磁路是由2片钕铁硼磁铁和主导磁板和导磁垫片组成，我们在实践过程中发现这种磁路结构不适合于低频扬声器的使用，我们通过使用FEMM（Finite Element Method Magnetics）软件包对该磁路进行了分析，该磁路的磁场范围被分成3个区域，其中在主导磁板附近形成一个正向磁场，在正向磁场的两边存在反向的磁场，音圈在工作时有很大一部分进入了反向磁场中，在反向磁场内线圈的感应电流方向与驱动电流方向相同，使得音圈呈现出负感抗特性，由于音圈的负感抗特性引起电流的增加导致音圈发热甚至烧毁，因此在扬声器中使用开式磁路时，音圈的运动范围应控制在正向磁场范围之内，否则音圈运动到反向磁场区域时将会产生很大的失真和发热，即使在设计时已经将音圈的运动范围控制在正向磁场范围之内，由于正向磁场的2个边缘磁场强度衰减太快，同时开式磁路中磁场的分布不是平行的，而是自由发散的分布，这样肯定会导致扬声器的非线性失真，因此我们得到的结论是：开式磁路并不是一个理想的磁路，它不适合于低频扬声器的使用，但它还可以应用于中高频扬声器。

When the stream is collisional, the negative energy nature changes to negative dissipative nature.

流束存在碰撞时，负能性质改变为负耗散性质。

While in Ass.haloxy persicum-H.ammodendron communities, either Haloxylon ammodendron population or Haloxylon persicum population, the spatial pattern was also congregative in 0~50m scales.While sometimes there was a transition from congregative pattern to regular pattern between them. There was a negative or positive, no relation and negative relation change series between Haloxylon ammodendron and Haloxylon persicum. In Ass.

梭梭-白梭梭群落的梭梭种群和白梭梭种群的空间格局比较复杂，但在所研究的尺度(0～50m)上，种群空间格局呈聚集分布或由聚集分布向均匀分布转变；梭梭与白梭梭的种间关系在空间上呈负相关或正相关、不相关和负相关变化序列。

Recording electrode was placed on the scalp near the olfactory bulb. Results Electrically evoked olfactory potentials composed of triphasic negative-positive-negative peaks, named N1, P1, N2 respectively, were detected on the olfactory region. The latencies of N1, P1, N2 were 16.27ms, 25.36ms, 49.75ms respectively in cribriform plate.

结果 电极置于筛板和鼻甲嗅区粘膜可记录到一组&负-正-负&三相的诱发电位波，依次命名为N1、P1、N2，当刺激强度为2.0 mA时，筛板粘膜诱发电位的潜伏期分别为16.27、 25.36、 49.75 ms；鼻甲嗅区粘膜诱发电位的潜伏期为20.29、31.31、 46.83 ms。

Statistic indicates that half of the sepsis is caused by Gram-negative bacteria,and that lipopolysaccharide,which release from the cytoderm of Gram-negative bacteria,is considered to be the major molecule which is responsible for the endotoxin sepsis.

统计表明，临床半数的脓毒症是由于革兰氏阴性菌(Gram-negative bacteria)感染引起的，革兰氏阴性菌的细胞壁上的脂多糖(lipopolysaccharide，LPS)，或称为内毒素，被认为是革兰氏阴性菌引起脓毒症的主要作用分子。

Methods 34 heroin addicts were equally divided into treatment group and control group.Based on substitution of Methadone decreasingly,the patients of treatment group were additionally treated with aerosl bioelectricity apparatus(which generates negative charge with 1×107/cm3),once a day,for 7 days.Each patient was inhaled negative charge for 120min.

对海洛因依赖者34例分为两组，在美沙酮替代递减治疗的同时，治疗组采用珠海产SQ-365型气溶胶生物电理疗仪，以发生1×107个/cm3的负电荷吸入120 min，每天1次，治疗7 d 后观察血、尿吗啡含量及临床症状。

Chapter Four Semantic Analysis of Imperative Sentences in Zutangji (1) On the one hand, the positive and the negative imperative sentences are different in using verb. Selfness verb can be used in both kinds of sentences, while derogative can only be used in negative sentences.

第四章 《祖堂集》祈使句的语义分析（1）祈使句的肯定式和否定式对动词有着不同的语义选择，自主动词既可进入肯定式，也可进入否定式；非自主动词只能进入否定式，不能进入肯定式。

Landscape difference are not relative with biota index in this research. There are negative between MPFD index and bird index in class level, it meas the mor complex of the land patch shape the lower dird index. And last in LSIM index are negative relative with bird index.

在土地利用层级的地景歧异度分析与生物的歧异度分析结果在本研究中没有相关，在土地利用类别层级的指数计算方面，碎型维度与鸟类歧异度呈现负相关，表示土地使用形状越复杂，鸟类歧异度越小；而最大地景比例的部份，则与鸟类歧异度成负相关。

The law does not concentrate on individual risk, which results from price fluctuation, but on negative uncertainty of market system, which results from inperfect futures market distemperedness, namely futures risk is negative uncertainty resulting from inperfect futures market.

法律所关注的风险不在于价格波动导致的单个市场主体损失，而在于因期货市场不健全导致的市场整体的负的不确定性，即期货风险是由于期货市场不健全导致的负的不确定性。

The cardiac effects of Ado are negative chronotropic; dromotropic; inotropic and coronary vasodilation which serves as a negative feedback regulator in the cardiovascular system in order to rectify the oxygen supply/demand imblance.

以负性变时、变导、变力及扩张冠脉等作用对心血管系统发挥负反馈调整效应，维持心肌氧的供需平衡。

Must have Coordination and negotiation skill, flexible ideas, and be punctilious person.

必须具备较好的协调与谈判能力，头脑灵活，工作认真仔细

Result: 18 patients are all with simple eye.The pigment mole lies in nasal and temple sides of the ball conjunctiva,in which 2 lie in lacrimal caruncle and semilunar plica.

结果：18例患者均为单眼，色素痣大多数位于内外侧睑裂部球结膜面，2例位于泪阜及半月皱襞，经激光治疗后，10例色素痣消失，有5例行再次激光后消失，2例行第三次激光后消失，1例第四次激光后消失。