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But in practical operating, overvoltage caused by reignition of the vacuum switching device frequently appears, and it result in damage of the capacitor bank or the switchgear itself. Ensuring the switchgear against reignition and installing a protective device are two main approaches to avoid the phenomenon. In this paper, a study on overvoltage caused by reignition due to capacitor bank switching with the vacuum switching device and its preventive measures are carried out. The main work which has been done and researches are as follows: 1. The producing mechanism of overvoltage and its influence factor are analyzed. It is pointed out that single-phase reignition is the main reason for damage of the switchgear and two-phase reignition is the main reason for damage of the capacitor bank,so overvoltage of single-phase reignition and two-phase reignition are the emphases of prevention. 2. Analysis of the special working condition of the operating switch for capacitor bank is carried out. It indicates that the vacuum switching device is difficult to realize no-reignition under this operation condition, so it is more practical to adopt protection devices. 3. Analyses of protection effect of RC and MOA and their shortages are carried out. It shows that the two methods can only restrain effectively overvoltage caused by single-phase reignition, and they cannot protect the capacitor bank when reignition of two-phase occurs. 4. The operation principle of G-R damping device is analyzed and discussed emphatically.

本文针对真空开关投切电容器组时因重燃而产生的过电压及其防治措施进行了研究，所开展的主要工作和研究结果如下： 1、对过电压的产生机理及其影响因素进行了分析，指出单相重燃是导致开关设备损坏的主要原因，而两相重燃则是导致电容器组损坏的主要原因，因此单相重燃和两相重燃过电压是防护的重点； 2、对电容器组操作开关的特殊运行条件进行了分析，指出在这种运行条件真空开关难于实现不重燃，因此采用保护装置更具有现实意义； 3、对RC与MOA的保护效果和存在的不足进行了分析，指出这两种方法均只能有效抑制单相重燃过电压，而不能在发生两相重燃时保护电容器组； 4、重点对G-R阻尼装置的工作原理进行了分析和讨论，指出该装置接入后线路中将会出现两种频率的高频振荡，而电容器组上的过电压是由这两种振荡共同决定的； 5、根据对上述两种振荡的分析指出存在一个最佳电阻值使得过电压最低，并提出了电容器组电压和最佳电阻值的近似求解方法； 6、使用电气暂态分析软件MATLAB对G-R装置的保护效果进行了仿真计算，证实该装置确实可以有效抑制重燃时的电容器组过电压； 7、根据仿真与近似计算结果的偏差提出了近似计算的修正方法，经过修正后的过电压计算结果与仿真结果吻合较好； 8、对G-R装置中放电装置G与阻尼电阻R的要求进行了分析，指出采用编织电阻和真空间隙可能是最佳选择。

Grandis had the higher caloric values that were 19.03 kJ/g and 19.28 kJ/g respectively in two communities. The species with the low value were Axyris amaranthoides and Chenopodium glaucum in L. chinensis community (15.04 kJ/g), and Salsola collina in S. grandis community (12.75 kJ/g).

群落水平上，羊草群落和大针茅群落热值最高的均是大针茅，分别为19.03和19.28 kJ/g，热值最小的植物种在羊草群落中为轴藜Axyris amaranthoides和灰绿藜Chenopodium glaucum，在大针茅群落中为猪毛菜Salsola collina。

Strains G-03 and G-03/a were inoculated in flasks and cultivated continuously for 4 generations. Compared with the host strain G-03, the glutathione concentration in the main fermentation broth and final beer of strain G-03/a increased by 32.1% and 13.8%, the stability index increased by 7.7% and 5.3%, respectively, and the flavor resistance staling value in final beer increased by 45.0%.

在锥形瓶中连续发酵4代后，与原菌株相比，转化菌G-03/a发酵液、成品酒中GSH含量分别提高32.1%和13.8%，发酵液和成品啤酒SI系数分别提高7.7%和5.3%，成品啤酒RSV值提高45.0%。

The grafting effect and mechanism was charac- terized by FTIR,The heat stability of unvulcanized and dynamical mechanical proper- ty of vulc- lcanizates of SBR and SBR-g- were tested by TG and DMA respectively. medium-resistance properties of SBR and SBR-g- vulcan- izates were also investigated.The results showed that addition of St accelerated GMA grafting onto SBR and control the decomposition of SBR. When the conditions were GMA/St/DCP was 8/4/0.3 and grafting temperature was 160℃.

结果表明，St对提高接枝率、抑制SBR的降解起到了积极的作用；SBR中聚丁二烯的α－H和双键共同参与了GMA/St熔融接枝反应；当SBR/GMA/St/DCP=100/8/4/0.3、接枝温度为160℃时，SBR的接枝率较高（23.78%），SBR–g–硫化胶的拉伸强度和撕裂强度比SBR硫化胶的分别提高了119%和27.4%；SBR–（GMA--co-St）未硫化胶的Tg比SBR未硫化胶的高，而耐热分解性能优于SBR未硫化胶；SBR–g–硫化胶在低温条件下的刚性增大、弹性降低、具有较低的内耗，在常温下的阻尼性能较高，但弹性性能保持较好；SBR–g–硫化胶的耐热稳定性以及耐非极性有机溶剂的性能优于SBR硫化胶。

Results: The growth of NB4 cells was inhibited significantly after treated with berbamine at different concentrations for different time points, the IC50 value was 3.860μg/ml at 48 hours. Morphology analysis showed the characteristics of apoptosis, and the DNA agarose electrophoresis showed the typical DNA ladder. The apoptosis rate increased from 2.83% to 58.44% after treated with berbamine at 12μg/ml for 18 hours. The expression of PML-RARα mRNA presented no significant changes, however, Survivin mRNA was decreased dramatically.

结果：经不同浓度小檗胺处理不同时间后，NB4细胞生长出现明显的抑制，并呈现明显的时间剂量依赖性，48h IC50为3.860μg/ml；细胞形态学观察可见细胞凋亡现象，DNA琼脂糖电泳显示典型的凋亡梯形图：流式细胞仪检测发现细胞凋亡率明显增加，经48h作用后，凋亡率从2.83%增至12μg/ml时的58.44%；虽未发现药物作用后PML/RARα基因表达量的改变，但检测到NB4细胞经药物作用后Survivin基因表达量的减少和Caspase3表达的增加，Caspse3阳性率从对照组的2.06%增至12μg/ml时的70.89%。

In the medium of H2SO4 with KBr as the catalyst, the color of Cresol Red oxidized by iodate can be faded, and the degree of color fading is proportional to the concentration of iodine and the linear range of determination is 20 μg/25 mL~50 μg/25 mL.

在硫酸介质中、在溴化钾催化条件下，碘酸根对甲酚红有褪色作用，且褪色的程度与碘酸根的量有关，碘定量测定的线性范围为20μg/25mL～50μg/25mL，检出限为6.57×10-1μg/25mL，回收率为98.1%～104.2%。

After the rats were orally administered with 0.066 4 g/, 0.134 g/, 0.4 g/ lycopene and the oil for 30 days, the concents of serum MDA, the energy of serum SA, the energy of serum GSH-Px and the contents of lipofasciin in liver were observed.

各组大鼠分别经口灌胃给予0.066 4 g/？0.134 0g/？0.400 0 g/的番茄红素及食用油30天后，测定血清中MDA含量？超氧化物歧化酶活力？谷胱甘肽过氧化物酶活力？

An electric bass guitar and g黫ra help anchor the rhythm - with the g黫ra sounding a bit like a high-hat (in pre 1990s bachata, maracas were played instead of g黫ra). The use of the bongo drum further solidifies the basic beat, and provides and percussive accents in transition points - for instance right before a chorus.

用电贝司和g黫ra（一种打击乐器，音色类似high-hat）保持节奏（上世纪90年代之前，使用maracas而不是G黫ra）。bongo鼓更加强化了节奏，同时在转调时提供重音提示。

After being oxidated for 34 h, and then the contents of Fe2+ in the 9K liquid solution with 4×10-4mol/ L xanthates, dithiophosphates and D-250 added inreased from 4.03 g/L to 4.64, 4.77 and 5.91g/L, respectively. After leaching for 35 d, the leaching rates of Zn are 92% and 61% respectively. It shows that the flotation reagents (xanthates, D-250) have great effect on the activity of bioleaching bacteria.

研究结果表明：添加4×10-4mol/L的丁基醚醇、乙基黄药、丁胺黑药，氧化34 h后，使 K液体培养基中的Fe2+质量浓度由4.03 g/L分别增加至4.64 g/L， 4.77 g/L和5.91 g/L；浸出35 d后，精矿中的浸出率分别为92%和61%，这进一步验证了浮选药剂对浸矿细菌活性的影响。

The contents of rice prolamine are largely among 2~6 mg/g,accounting for 72.0%.

大部分水稻品系醇溶蛋白总含量在2~6 mg/g这个范围，占所测水稻品系总数的72.0%；醇溶蛋白总含量在16 mg/g以上的水稻品系很少，占所测水稻品系总数的1.0%；醇溶蛋白含量最高的为来自台湾的编号为T-9598的品系，总含量达23.73mg/g；含量最低的是来自古巴的编号为C-5360的品系，总含量仅为0.35 mg/g。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。