小缺点

The result shows that the method can overcome the limitation of local infinitesimal, and can meet the requirements for speediness and accurateness during fault diagnosis process.

结果表明：该方法能克服诊断过程中容易陷入局部极小的缺点，并能满足故障诊断的快速性和准确性要求。

Accuracy, precision and operation of this microburet were comparatively studied with those of the commonly used buret.

这种滴定管节省试剂，废液排放量极小，操作简单、省时，克服了常规微量滴定管精密度差、装液难、零点和滴定终点不易控制的缺点。

The external fixator was a good, economical, effective and simple method in the treatment of femoral neck fracture. The three pins used in fixation of femoral neck fracture are important. The placement of the pins should be in accordance with the compressive trabeculae and clingy to the femoral calcar.

3动力髋螺钉虽然在固定强度上优于其它各组，但却由于手术创伤大、对股骨头残存血供破坏较大等缺点而限制了其应用；自行设计的外固定支架为一种简单、有效、实用、经济的固定方法，有一定的推广价值；穿针方向应循压力骨小梁方向尽量贴近股骨距低角度倒三角形钻入才符合生物力学原理。

We compare and analyse these methods by Monte Carle simulation method on computer.

在多因素控制与诊断方面，本文将两种质量诊断理论的思想应用于多因素诊断，提出了多因素选图与休图相结合以及单因素选图与休图相结合的两种多因素诊断方法，指出了现有多元质量控制方法中存在的缺点，并提出了逐步诊断的思路和三种用于多因素诊断的逐步诊断方法，即顺序统计量逐步诊断法、最小距离逐步诊断法和两种质量逐步诊断法，然后通过统计模拟进行了分析和比较。

Fault: Small, close-set or light eyes; excessive eye white.

缺点：眼睛小，两眼距离过近，眼睛颜色过浅，眼白过多。

Fault: Narrow head, close-set eyes.

缺点：头部过窄，两眼距离过小。

The invention discloses a ternary alloy hyperacoustic motor frictional material of the fire resistance resin modified polyphenyl ester, which solves the low friction coefficient problem, the low impact strength problem, the low abradability problem and the bad processability problem of the prior hyperacoustic motor.

耐高温树脂改性聚苯酯三元合金超声马达摩擦材料，它涉及一种聚苯酯基超声马达的摩擦材料。本发明解决了现有超声马达摩擦材料存在摩擦系数小、冲击强度低、耐磨性能达不到要求，以及加工性能差等缺点。

Millimeter wave circularly polarized microstrip antenna has the advantage of low profile,simple configuration,but commonly it has narrow impedance bandwidth and axial ratio bandwidth.

毫米波圆极化微带天线具有体积小、结构简单等优点，但是同时也存在阻抗带宽和轴比带宽相对较小的缺点。

Focusing on some disadvantages in standard BP algorithm, such as low convergence rate, easily falling into local minimum point and weak global search capability, Genetic algorithm is used to optimal the connection weight of BP Algorithm in this paper, and construct a GA-BP algorithm of evolutionary neural network, and the algorithm is applied to the control of BLDCM speed adjusting system.

针对标准BP算法存在全局搜索能力弱和易陷入局部极小点等缺点，本文将遗传算法与BP神经网络相结合，构造了一种新的进化神经网络GA-BP算法，并将该算法应用于无刷直流电机调速系统的控制，仿真结果表明，与传统的PI控制系统相比，该算法得出的电机控制曲线几乎无超调，与基于BP算法的速度控制系统相比较，具有收敛速度快、不易陷入局部极小的优点。

By the method of dividing niches,niching particle swarm optimization has kept the diversity of species,overcome the drawback of basic PSO,such as being subject to falling into local optimization and having the poor convergence speed,and so improved the ability of seeking global optima.

小生境粒子群算法通过划分小生境的方法，保持了物种的多样性，克服了粒子群算法容易陷入局部解，后期收敛速度慢的缺点，提高了算法的全局寻优能力。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。