热稳定的

In the one half part, according to the strontium nature, thermodynamic calculation of correlative reaction and the principle of the vacuum aluminothermy reduction process, with the laboratory findings of preparation strontium by vacuum aluminothermy reduction compared and analyzed in different parameter conditions, a variety of factors which effect the decomposition rate of SrCO_3 and the percent reduction of strontia are gotten out. The factors include that the decomposition rate of SrCO_3 is influenced by different addition and pressure. They also include that the percent reduction of strontia is influenced by excess coefficient of reducing agent aluminium powder, the particle size of raw material or reducing agent, the pressure of barbecuing, temperature and reduction time. According to those, we can draw the conclusion as follows:(1) Decomposition temperature of SrCO_3 is decreased by adding carbon and alumina in different degree.(2) With quantitative carbon added under the vacuum condition, the decomposition temperature of SrCO_3 is decreased obviously, which can fall 150℃ compared with atmospheric pressure.(3) In keeping 1150℃ of 2.5h, under the 5Pa vacuum condition, the decomposition rate of SrCO_3 nearly keeps in 99% steadily.

在前半部分的真空铝热还原法中，根据锶的性质、相关反应的热力学计算及真空铝热还原法原理，通过对不同参数条件下的真空铝热还原法生产金属锶的实验结果的分析比较，得出了影响SrCO_3的分解率和氧化锶的还原率的种种因素，具体因素包括不同添加剂、不同气压对SrCO_3分解率的影响，还原剂铝粉的过量系数、原料与还原剂的粒度、制团压力、温度和还原时间等对氧化锶还原率的影响，得出具体结论如下：(1)添加碳和Al_2O_3能不同程度的降低SrCO_3的分解温度；(2)真空条件下加入一定量的碳可显著降低SrCO_3的分解温度，比之常压下可降低150℃之多；(3)在1150℃恒温2.5h、真空度达到5Pa的条件下，SrCO_3的分解率几乎保持稳定在99％；(4)氧化锶的还原率随还原剂过量系数的增大而增大，但是趋势越来越小，当过量系数超过25％后，氧化锶的还原率几乎不再增加；(5)氧化锶的还原率随原料与还原剂的粒度的变细而增加；(6)氧化锶的还原率随制团压力的增加而增加，但超过一定值后，氧化锶的还原率反而会下降；(7)氧化锶的还原率随还原温度的升高而增加；(8)氧化锶的还原率随还原时间延长而增加，在本实验条件下，超过2.5h趋于稳定。

The results show that the atmosphere has a big influence on the thermal stability of C_(60).C_(60) begins to decompose at 423.5℃in the air,the deomposed peak temperature is 668.5℃,but very stable in the helium atmosphere,only sublimate,the crystal shape of C_(60) has a certain influence to its thermal stability.The synthesized nine kinds of nitro-fullerene derivatives all have good thermal stability and their decomposed peak temperatures all exceed 350℃.The thermal explosion temperature for 5 seconds delay of product 4 is 253℃.The category,number and position of nitryl group in nitro-fullerene derivatives all have influence on their thermal stability.

利用差热分析仪和DSC-TG综合热分析仪对C_(60)及其硝基衍生物的热稳定性进行了研究，结果表明，环境气氛对C_(60)热稳定性影响很大，C_(60)在空气中423.5℃开始分解，放热峰值温度为668.5℃，在氦气中很稳定，仅表现为升华，C_(60)的晶型对其热稳定性也有一定的影响；合成得到的九种硝基富勒烯衍生物都具有较好的热稳定性，分解峰值温度均高于350℃；产物4的5秒爆发点测试结果为253℃。

Numerical Simulation and Experimental Investigation on A Thermoacoustic Engine with Tapered Resonance Tube A symmetrical standing-wave thermoacoustic engine with tapered resonance tube has been numerically simulated with liner thermoacoustics. The simulation shows that using tapered resonance tube in thermoacoustic engine could decrease the velocity amplitude and lower the total acoustic power loss in the resonance tube. The experimental results indicate that the harmonic was suppressed effectively by using the tapered resonance tube, and the pressure ratio was improved.

采用锥形谐振管的热声发动机的数值模拟和实验研究利用线性热声理论，对一台采用锥形谐振管的驻波型热声发动机进行了数值模拟，发现采用锥形谐振管可有效降低工质气体的速度振幅，进而减小在谐振管中声功率的损失；与一台在相同频率下工作的采用等直径圆柱谐振管的驻波型热声发动机进行了实验对比，结果表明，在使用锥形管作为谐振管的热声发动机系统中，谐振管中的非线性效应得到了明显的抑制，热声发动机在基频模式下稳定运行，压比增大而加热温度降低。

Heat shrinkable packer is automatic successive shrinkable packaging device and is the latest pattern in our country, using quartz farness ultrared rays tube and electricity-saving (may save more than 15%); the humidity of shrinking and the conveying rate of the electric machine is adjusted, and the adjusting range is extensive; Original creation roller rotation devise and can work continuously.

TW-500热收缩包装机/热收缩机/热收缩膜包装机/热收缩膜机/烘乾炉/烤箱：是目前国内最新型的自动连续收缩包装设备，采用石英远红外管加热，节电高效（节电15%以上）；收缩湿度和电机机传机速度稳定可调，且调节范围广；独创滚筒自转装置，可连续工作。

Heat shrinkable packer is automatic successive shrinkable packaging device and is the latest pattern in our c o u n try, using quartz farness ultrared rays tube and electricity-saving (may save more than 15%); the humidity of shrinking and the conveying rate of the electric machine is adjusted, and the adjusting range is extensive; Original creation roller rotation devise and can work continuously.

产品说明： TW-500热收缩包装机/热收缩机/热收缩膜包装机/热收缩膜机/烘乾炉/烤箱：是目前国内最新型的自动连续收缩包装设备，采用石英远红外管加热，节电高效（节电15%以上）；收缩湿度和电机机传机速度稳定可调，且调节范围广；独创滚筒自转装置，可连续工作。

Heat shrinkable packer is automatic successive shrinkable packaging device and is the latest pattern in our country, using quartz farness ultrared rays tube and electricity-saving (may save more than 15%); the humidity of shrinking and the conveying rate of the electric machine is adjusted, and the adjusting range is extensive; Original creation roller rotation devise and can work continuously.

产品说明： TW-500热收缩包装机/热收缩机/热收缩膜包装机/热收缩膜机/烘乾炉/烤箱：是目前国内最新型的自动连续收缩包装设备，采用石英远红外管加热，节电高效（节电15%以上）；收缩湿度和电机机传机速度稳定可调，且调节范围广；独创滚筒自转装置，可连续工作。

Shrinkable packer is automatic successive shrinkable packaging device and is the latest pattern in our country, using quartz farness ultrared rays tube and electricity-saving (may save more than 15%); the humidity of shrinking and the conveying rate of the electric machine is adjusted, and the adjusting range is extensive; Original creation roller rotation devise and can work continuously.

佛山PE热收缩包装机〓中山热收缩机〓深圳收缩炉〓东莞PE收缩包装机/珠海收缩机〓收缩机〓热收缩机〓收缩包装机〓热收缩包装机〓收缩炉〓烘干炉〓烤箱是目前国内最新型的自动连续收缩包装设备，采用石英远红外管加热，节电高效（节电15%以上）；收缩湿度和电机机传机速度稳定可调，且调节范围广；独创滚筒自转装置，可连续工作。

Shrinkable packer is automatic successive shrinkable packaging device is the latest pattern in our country, using quartz farness ultrared rays tube electricity-saving (may save more than 15%); the humidity of shrinking the conveying rate of the electric machine is adjusted, the adjusting range is extensive;iginal creation roller rotation devise can work continuously.

佛山pe热收缩包装机〓中山热收缩机〓深圳收缩炉〓东莞pe收缩包装机/珠海收缩机〓收缩机〓热收缩机〓收缩包装机〓热收缩包装机〓收缩炉〓烘干炉〓烤箱是目前国内最新型的自动连续收缩包装设备，采用石英远红外管加热，节电高效（节电15%以上）；收缩湿度和电机机传机速度稳定可调，且调节范围广；独创滚筒自转装置，可连续工作。

The effect of four types of stabilizers on the thermooxidative stability of nitrate ester plasticized polyether-urethane was investigated by TG.

采用热失重分析法研究了四类稳定剂对硝酸酯增塑聚醚聚氨酯的热氧稳定效果。

Our factory is specialized manufacture all kinds of special shape of the bent glass, styling, including L, U, W, Z, spherical, oval, round, cone, back to bell-shaped and many other forms, our plant would produce its own super-hot bending furnace can be custom-made glass, hot bending the maximum size of 8000mm * 3600mm * 19mm, meet a variety of curtain wall and the large size of the needs of bent glass products used in fine cosmetics Showcase, jewelry Showcase, mobile phones Showcase, fish tank, glass coffee table, TV cabinet , bedside cabinets, a few telephone, shower room, spiral staircase, building curved balcony, transportation charges booth, light roof, sightseeing elevator, arched corridors, I-processing performance and stability of hot bending glass products, the quality of Good (no mold burn marks, there is no rainbow effect), size precision (error control in 1-2mm), low price (baked finished high rate, profit-sharing client) is willing to provide our clients with quality service, welcome calls, to e-mail consultation to discuss , and we look forward to your joining!

我厂专业加工制作各种特殊异形的热弯玻璃，造型包括L，U，W，Z，球面，椭圆，圆，圆锥，回字型等多钟造型，我厂自行制作的超大热弯炉可以定做热弯玻璃最大尺寸8000mm*3600mm*19mm，满足各种幕墙及超大尺寸的热弯玻璃的需求，产品应用于精品化妆品展柜，珠宝展柜，手机展柜，鱼缸，玻璃茶几，电视柜，床头柜，电话几，淋浴房，旋转楼梯，大楼弧形阳台，交通收费岗亭，采光顶，观光电梯，拱形走廊等，我厂加工的热弯玻璃产品性能稳定，品质优良（无模具烫伤痕迹，没有彩虹现象），尺寸精准（误差控制在1-2mm，价格低廉（出炉成品率高，让利客户），愿为广大客户提供优质服务，欢迎来电，来邮件咨询洽谈，我们期待着您的加盟！

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。