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Study limitations include small sample size, exclusion of several potentially eligible children because of medication-related drowsiness or refusal to participate, limited ability to generalize the results, and testing of some children more than once resulting in a learning effect or decreased pain due to healing. Older children found the game too simple and therefore not as distracting as the younger children reported it to be. Because the VR equipment was not waterproofed, pain responses could not be determined through an entire dressing change, including during wound debridement in the bathroom.

这项试验的限制因素，包括样本数很小、排除许多潜在合适的儿童，因为药物相关的嗜睡或是拒绝参与试验，而限制了这个试验结果的普遍性，而且对许多儿童进行一次以上的试验会造成一种记忆效果，或是因为复原而减少疼痛；年龄较大的儿童觉得这些游戏太过简单，因此不像对年龄较小的儿童一样，那麼地吸引人；且因为VR装备不是防水的，因此疼痛反应不能在换衣服时评估，包括於浴室时清创时。

The results showed that removal rates of five metals were 3.79%, 2.04%, 1.66%, 0% and 0%, respectively, under conditions of ultrasound time of 20 minutes. When nitric acid was added to the sludge, the removal rates were 2.32%, 40.67%, 68.15%, 26.98% and 27.24%, respectively.

结果表明，在超声时间为20分钟时，未加酸时五种重金属Cu、Zn、Pb、Cd和Cr的去除率分别为：3.79%、2.04%、1.66%、0%和0%，而加酸时其去除率分别为：2.32%、40.68%、68.16%、26.98%和27.24%。

CTAC had the best effect, bringing the sludge cake moisture down to 68%. At 0℃, the above test was also done for the following conditions: untreated, CPAM, FeC13/CaO, and acid conditioning. The sludge cake moisture is lower at 0℃ than that at normal temperature. The untreated sludge and pH=2 sludge had the lowest moisture. At -15 ℃, CTAC brought the sludge cake moisture down to 62.8%, 6% lower than at normal temperature.

结果表明，CTAC对污泥的调理效果最好，可使污泥滤饼含水率降至68%。0℃时，未经处理、CPAM、FeCl3/CaO、加酸处理条件下污泥脱水效果较常温时都有不同程度的提高，效果最好的为未经处理和pH=2条件下的泥样；-15℃时，CTAC条件下滤饼含水率较常温下降了约6%，达到62.8%。

The polymerization of preparing PDA could be impacted by allyl chloride, allyl alcohol and allyl aldehyde. The content of allyl chloride, allyl alcohol and allyl aldehyde in the DMDAAC monomer solution varied from 0mg/kg to 1000mg/kg, their intrinsic viscosity of PDA descended from 10.3dL/g to 8.0dL/g, 6.8dL/g and 8.8dL/g respectively. The polymerization of preparing PDA could be carried out well in the case the content of NaCl, active carbon, yellow residua and low molecular polymer of DMDAAC were less than 10000mg/kg, 1000mg/kg, 1000mg/kg and 50000mg/kg respectively.

单一杂质含量变化对聚合产物PDA特征粘度影响的研究结果表明：在DMDAAC单体溶液聚合反应过程中，当Fe~(3+)、Fe~(2+)和Cu~(2+)含量分别达到7mg／kg、9mg／kg和5mg／kg时无法得到聚合产物PDA胶体；当烯丙基氯、烯丙醇、烯丙醛含量分别从0mg／kg增加到1000mg／kg时，聚合产物PDA的特征粘度从10.3dL／g分别下降到8.0dL／g，6.8dL／g和8.8dL／g；活性炭和黄色物质含量在1000mg／kg以下，低聚物含量在50000mg／kg以下以及氯化钠含量在10000mg／kg以下时产物PDA的特征粘度降低变化量不超过0.2dL／g。

The experimental results indicates that the optimum pH range was 1.60~2.20, and the optimum H2O2 concentration was 10.0 mmol/L. The degradation ratio increased with the increasing concentration of ammonium ferric oxalate in the range from 0.1 to 1.0 mmol/L, but no significant increase in degradation ratio was observed when the concentration was above 1.0 mmol/L. When the concentration of fuchsin basic increased, the degradation ratio dropped, while the concentration of degraded fuchsin basic rised. When the concentration of fuchsin basic was low, the degradation followed first-order kinetics, but when it was high, the degradation could be fitted by zero-order kinetics. The absorbtion of fuchsin basic at 543 nm disappeared quickly, while the absorbtion of intermediates formed during the course of fuchsin basic dagradation at 298 nm vanished slowly.

试验结果表明：碱性品红降解的最佳初始pH为1.60~2.20，最佳初始H2O2浓度为10.0mmol/L；草酸高铁铵的浓度在0.1~1.0mmol/L时，碱性品红的降解率随浓度的增大而增大；高于1.0mmol/L时，则降解率相差不大；碱性品红的初始浓度增大，降解率减小，而实际降解的浓度则增加；碱性品红的浓度在低和高时，降解动力学过程不一致；随降解的进行，碱性品红在可见光区的吸收峰迅速消失，而降解过程中形成的中间产物吸收峰却消失很慢。

When the frequency is 15Hz and number of ampere turns is 20kA·turn, relative intracrytalline solubility of alloy elements (for Zn, Mg and Cu the solubility are 68.8%, 76.0% and 45.0％, respectively) is the highest; when the frequency is 15Hz and number of ampere turns is 20kA·turn, Vicker hardness is the highest of Hv160; when the frequency is 25Hz and number of ampere turns is 20kA·turn, ultimate tensile strength is the highest of 324MPa.

频率为15Hz，安匝数为20kA·turn时， Zn、 Mg和Cu元素相对溶质固溶百分数最高，分别为68.8%、 76.0%和45.0％；频率为15Hz，安匝数为20kA·turn时，锭坯维氏硬度最高为Hv160；频率为25Hz，安匝数为20kA·turn时，抗拉强度最高为324MPa。

In the fourth paragraph, how the theory of the damping to forging hammer foundation advances at home and abroad, the research and application of the implement for damping to forging hammer, the structure of damping to forging hammer and the calculation methods for forging hammer foundation vibration system, which are used at home nowadays, are particularly introduced.In the fifth paragraph, aiming at direct damping under anvil block of forging hammer, the author bases a mechanics model of two-degree with damping, and optimizes the vibration parameters both in frequency field and in time field, then finds out the new simple method of optimizing the vibration parameters of the damping device under anvil block of forging hammer.

第五章针对锻锤砧下直接支承式减振基础，建立了锻锤减振系统的二自由度有阻尼振动力学模型，然后用傅立叶变换法求出振动传递率的频率关系，用直接积分法求出砧座和基础位移的时域响应，并分别对频域函数和时域函数进行参数优化，最终建立起频率函数—时域函数—优化参数间的相互关系，从而找到了锻锤砧下隔振器参数优化的简便新方法。

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绝不能放入装有浓硝酸和浓硫酸的液体中浸洗。更不能达到10分钟之危险行为的化学反应后爆轰。清洁应用清水洗涤。后凉干。产品设计有可以调动大小的活绳圈。手指在操作时穿进一转即被套紧。如不操作时。只要把手指左右转动一下便可以自动松开圈套。安全方便简单。纯天然没有任何至癌的化学染料和化学色素。在水溶液中达到一定时间可变色腐化的环保材质。在拉力范围外可拉断。的标准通用绳子。YOYO球绳子，悠悠球绳子，摇摇球绳子，溜溜球绳子。yo -yo手工绳。有标准拉力绳子和较强拉力绳子和特强拉力绳子。 1A或2A或3A或4A或5A等多种规格。练习用或比赛用或观赏拍摄用。记住。为什么比赛时一定要选用白色的绳子。

Due to FC nature of the repeater, FC repeater uses twice as much frequency as the conventional CS, PS, or amplifiers. Thus, one must pay special attention not to let the signal leaks out to the un-intended coverage area, especially areas under noticeable frequency blockage. When used for outdoor application, it should only be used for low traffic areas.

由于变频直放机的工作需要占用比一般设备（基站、手机、基站放大器等）多一倍的频率资源，所以在应用中要注意：用于室内覆盖时避免直放机与手机通信时的信号泄漏到话务量很高的室外引起频率阻塞；用于室外覆盖时，应该使用在基站稀疏，话务量低的区域。

In this paper Ⅰ successfully applied these methods to fault diagnosis, and presenting some new innovative machinery fault diagnosis method; First Ⅰ present a new gear wornout fault diagnosis method, this method use the vibration signal's time-frequency attribute and instantaneous phase undulation to accurately detect gear's fault, and by comparing with the traditional frequency domain analysis method, this method reveals that many nonlinear and nonstationary characteristic exist in gear's vibration, this tell us that if we use frequency domain analysis method without pay attention to the signal's characteristic, we could get wrong diagnostic result; Then Ⅰ present a new bearing fault diagnosis method, this method use ATVFD and Hilbert transform to do envelop demodulation,Ⅰ analyze the envelop with time-frequency method and find out that this method is more accurate then traditional method.Ⅰ also explain that the modulation of the fault to the carrier wave may also be non-stationary and nonlinear; Finally Ⅰ present a cylinder pressure measurement method of diesel engine by means of vibration, cylinder pressure is an important parameter of diesel engine fault diagnosis, the pressure measuring is simplified a lot by this method,Ⅰ also use the ATVFD and time-frequency analysis to realize it.

本文中将上述理论方法成功地应用到故障诊断中去，提出了几点创新性的诊断方法；提出了一种齿轮磨损故障诊断的新方法，该方法利用振动信号能量的时频域分布特征与瞬时相位波动特征可以进行精确的齿轮故障诊断，并通过与传统的频域诊断方法的比较，揭示出齿轮振动中存在的明显的非线性与非平稳特征，说明了不加选择地利用频域分析方法进行齿轮故障诊断很可能会得到错误的诊断结果；提出了一种轴承故障诊断的新方法，该方法利用ATVFD分解与Hilbert变换进行包络解调，并对解调得到的包络信号进行时频域分析，可以实现更加准确轴承故障诊断，说明了故障对载波信号的调制往往也是非平稳与非线性的；提出了一种利用振动信号进行柴油机汽缸内压力检测的新方法，柴油机汽缸压力的变化是柴油机故障诊断的重要参数，利用振动方法可大大简化汽缸压力的检测过程，该方法也是综合利用ATVFD分解与时频域分析方法实现的。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷