热的产生

Heat discharge by human's production and activity is the main cause of thermal pollution.

引 言 热污染，是指自然界和人类生产、生活产生的废热对环境造成的污染。

In the three systems, system realizes the crosslinking of PVC bases on the peroxide crosslinking mechanism, the tensile strength of crosslinked PVC has been improved somewhat, the IR spectrum of gel demonstrates that there are characteristic absorption peaks of n-alcohol that belongs to ethanol amine and benzenoid group. From the analysis of gel structure , deduces that the mechanism of crosslinking reaction: under the initiations of peroxide and high temperature, PVC yields macromolecules free radicals, at the same time , styrene"s polymerization and grafting onto PVC takes place, at last the system forms crosslinking structure through coupling between radicals; confirms that triethanol amine can absorb HC1 produced by degradation of PVC, so improves the crosslinking efficiency of peroxide, decreases the HCl"s promotion for PVC"s degradation; deduces that triethanol amine can activate the PVC macromolecules and prolong the free radicals" life-time of PVC macromolecules; the effect to the PVC macromolecule makes styrenes graft reaction easy, and thus improves the crosslinking efficiency.

三种体系中三乙醇胺/过氧化二异丙苯/苯乙烯体系基于过氧化物交联机理实现了聚氯乙烯的交联，聚氯乙烯交联后拉伸强度有一定提高，凝胶红外光谱分析证实了凝胶结构中含有乙醇胺的伯醇基团特征吸收和苯环的特征吸收，由凝胶结构分析，推断出交联反应的机理：聚氯乙烯在过氧化物和热作用下产生大分子自由基，苯乙烯在过氧化物和大分子自由基的作用下发生聚合和接枝反应，最终通过自由基之间的偶合产生交联；证实三乙醇胺可以吸收聚氯乙烯分解产生的HCl，提高了过氧化物的交联效率，消弱了HCl对聚氯乙烯降解的促进作用；推断三乙醇胺可以活化聚氯乙烯大分子并有可能使聚氯乙烯大分子自由基存在的时间得以延长，对聚氯乙烯大分子的作用使苯乙烯的接枝反应易于发生，从而提高了交联效率。

With unique thermal property attributes, the interpolymer product is useful, for example, for impact, bitumen and asphalt modification, adhesives, dispersions or latexes and fabricated articles such as, but not limited to, foams, films, sheet, moldings, thermoforms, profiles and fibers.

由于其独特的热性质，该共聚体产生能用于，例如，抗冲材料、沥青及柏油的改性、粘合剂、分散液或胶乳及制备物件，比如，泡沫材料、膜、片材、模制品、热成形材料、型材及纤维，但不限于此。

The effect of inertia on thermal stress is shown by detailed digital simulation, in some cases, the neglection of inertia term will cause significant error of thermal stress.

此外，建立了考虑惯性项的汽轮机转子动态热应力数学模型，并就惯性项对热应力可能产生的影响作了详细仿真研究。

Aimed at the thermal crack and breakdown caused by the excessive thermal load of nozzle of former spheric precombustion chamber for diesel engine 12V180, the theoretical analysis and experimental research are conducted in this paper.

针对 12V180柴油机原球形预燃室喷嘴因热负荷过大而产生热裂和断裂脱落的问题，进行了理论分析和实验研究，提出了一种新型的预燃室———超小型水滴形预燃室。

Based on the detail about the Characteristics of Regenerative combustion,by the coal of the high temperature gasifying furnace,the regenerative reheating furnace is designed.

本文在详细分析蓄热式燃烧技术的基础上，利用高温气化炉产生的煤气，对蓄热式高温炉进行了设计。

The predicted results show that the composite's coefficient of thermal conductivity decreases with the increase of kinking distance , as well as , decreases with the increase of fiber volume f raction and void volume f raction.

结果表明：随着纤维束扭结处产生间隙与纱线宽度比值的增大，热传导系数减小；当其它参数不变时，热传导系数随着纤维体积含量和孔洞体积含量的增加而下降。

There are three effects that may be important in producing this trend. First, lowtemperature oxidation preferentially affects the finer single-domain magnetites responsible for the Hopkinson peak, which is therefore suppressed in the more oxidized loams. Second, the possible production of uniaxial magnetite with shape anisotropy can also lead to a relatively muted Hopkinson peak. There is, additionally, a third alternative, and the one preferred here, that the natural alteration processes involved in pedogenic susceptibility enhancement have probably depleted the supply of ironbearing precursor phases, so that less new magnetite is formed on heating.

产生这种特殊热磁性质的可能原因如下：第一，成土过程中的低温氧化作用减弱了磁铁矿的Hopkinson效应；第二，可能是成土过程中生成的一向延长的针状磁铁矿颗粒表现出较弱的Hopkinson效应；第三，随着成土作用增强，现代黄土、黑垆土中的硅酸盐、粘土矿物因受土壤化作用分解而越来越少，加热过程中分解产生的磁铁矿造成的磁化率增强相对于其初始磁化率也就越来越小，从而产生越来越弱的Hopkinson/alteration峰，本文认为这是最主要的原因。

Using simple boundary condition, the temperature gradient along the z direction is a constant while the generative internal heat is not considered.

用导热微分方程描述晶体中温度场时，把吸收的辐射热当做晶体产生的内热，方程从Laplace形式变为Posson形式。

The fused quartz brick is used as hot repair materials of glass furnace because of its low thermal expansion coefficient.

由于熔融石英砖的热膨胀系数小，它在玻璃熔窑上被作为热修补材料使用，从而也存在和其它耐火材料一样被侵蚀，引起蚀变，并在玻璃液中产生疵点的现象。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。