查询词典 aromatic properties

The effect of the SDT／S on the properties of NR compound was investigated The results showed that SDT／S plays the advanced role in NR compound,in order to keep the vulcanizate properties level as before may decrease some accerlator;the physical properties of overcured vulcanizate,the adhesion strength of optimum cure or overcured valcanizate between rubber and cord were improved by adding 2 phr of SDT／S to NR compound.

研究了SDT／S对天然胶胶料配方各项性能的影响。结果表明：在配方中使用SDT／S，对天然胶胶料起硫化促进作用，为保持原水平的硫化特性，可以适当减少促进剂的用量；可有效提高胶料过硫化条件下的300%定伸应力、扯断强度、邵氏硬度、撕裂性能、磨耗性能，可有效提高正硫化或过硫化条件下的胶料与帘线间的附着力。

Many geometric properties of spaces may be pointwise, pointwise geometric properties were the localization and meticulous of properties of spaces.

空间中许多几何性质可以点态化，点态几何性质是空间几何性质的局部化、精细化。

In this paper, two assemblies of special test equipments have been designed and fabricated by authors in our laboratory: namely Catalyst Molding Process Analyzer and Catalyst Mechanical Process Tester. These new skills are developed for the dynamic studies on whole mold forming process and crushing process of Fe-Cr WGHS catalyst pellet. Based on the orthogonal experimental design, the effects of some factors during the forming process of solid catalyst, such as predensification proportion, calcination time, calcination temperature and content of graphite on the mechanical strength of catalyst pellets are systematically examined, and the molding conditions have been optimized. Based on the experimental data, the relationship between catalyst density and forming pressure are educed, and the physical significances of some related parameters are described. The parameter of macro scopic elastic moduls has been suggested to character the mechanical properties of molding catalyst. The effects of molding pressure on mechanical properties of catalyst pellets are discussed, and results show that there exists a optimal molding pressure for the ideal mechanical properties: when over-high or over-low pressure is applied, the specific surface area and side crushing strength of catalyst pellets will decreased. The "rebound effect" will be undermined by the unsuitable pressure maintain process, resulting in the apparent decrease of mechanical strength of catalyst pellets.

本研究通过自行设计制造的催化剂模压成型过程分析仪（Catalyst Molding Process Analyzer， CMPA）和催化剂力学性质测试仪（Catalyst Mechanical Properties Tester， CMPT），以Fe-Cr系高温变换催化剂片剂为研究对象，对成型过程和受压破碎过程提供了全过程动态研究的新手段；本研究利用正交实验设计方法考察了固体催化剂成型过程中诸因素（包含预密致比例、煅烧时间、煅烧温度和石墨含量等）对催化剂成型体强度的影响，并对成型条件进行了优化；根据实验结果，关联确定了固体催化剂成型过程中的密度－压力关系式，并对方程中诸因子的物理意义进行了描述；提出了一种利用宏观弹性模量来表征成型催化剂的力学性质的方法；研究讨论了成型压力对催化剂成型体强度性质的影响，结果表明：对于催化剂成型体的强度和比表面性质，成型压力存在着一个最佳值，过高的成型压力会导致比表面积和侧压强度的降低；不适当的成型压力的维持时间会破坏&压力回弹&作用，造成催化剂成型体的机械强度明显降低。

For different silvicultural measures, the mechanical properties of Pinus sylvestris plantations were measured and analyzed. The results showed that the effect of silvicultural measures on many mechanical properties of Pinus sylvestris Plantations were not significant..In order to increase the mechanical properties of wood, growth-promoting and then get the better structure building lumber and glued lamination board, the stands on south slope or at the down of slope, and with density of 1.5m×1.0m, properly thinning could be selected. Results of this study can provide a theoretical base and good guidance for oriented breeding of Pinus sylvestris plantations.

摘 要：对不同培育措施的人工林樟子松木材力学指标进行测试和分析，结果表明：不同的培育措施（初植密度、间伐强度、坡向、坡位）对樟子松人工林木材的绝大多数力学强度指标有显著的影响，可选择阳坡、坡下、1.5m×1.0m、轻度间伐林分进行定向培育，来提高木材力学强度性能，从而加快林木生长，培育高产、优质的结构、建筑用材及胶合板材林。

The result indicated that the stress cracking resistance properties of polymer alloy were greatly improved comparing to pure HDPE, and there was a strong relationship between spherulitic structure, mechanical properties and stress resistant properties.

结果表明，共混体系耐应力开裂性能比纯HDPE有很大提高，而且应力开裂性能与材料的强度和球晶形态密切相关，强度较大且球晶小而不规则者，其耐环境应力开裂性能较好。

The mian works are as follows:(1)By coprecipitation technique and coprecipitation- gel technique the nano zirconia powder was produced, factors affecting the properties of nano zirconia powder such as pH and the content of stabilizator are analyzed;(2)By the new pressless sintering process, the nano zirconia ceramic was produced, factors which can affecting the properties of nano zirconia sinter body such as moulding press and the sinter temperature are analyzed;(3)By the microtherm pressless sintering process, the nano copper added functional zirconia ceramic composite was produced, microscopic dimensionality and electric properties of such sinter body and the factors affecting such sinter body are analyzed;(4)By the self-invented "external albumen coating" technique the zirconia powder was successfully coated by carbon in the corresponding sinter body, which can help solve the traditional aggregation problem to some degree;(5)Based on analyze the characteristics in the nano powder sinter process, the "three-ball sinter model" was proposed, for the relationship between the relative density and porosity of sinter body, by mathematical fitting, such model was successfully verified.

本研究比较系统地研究了纳米氧化锆陶瓷的合成与成型机理，特别是讨论了纳米氧化锆陶瓷的稳定性，为防止纳米颗粒在外场作用下的团聚和长大提供了理论基础和实验数据，具体工作有以下几方面：(1)采用共沉淀法和共沉淀-凝胶法制备了纳米氧化锆粉体，并分析了pH值和稳定剂含量对粉体性能的影响；(2)采用新型无压烧结工艺制备了纳米氧化锆陶瓷，并分析了成型压力和烧结温度对烧结体性能的影响；(3)采用低温无压烧结工艺制备出添加纳米铜的功能性纳米氧化锆复合陶瓷，并分析了烧结体的微观尺度和电学性能的变化以及影响因素；(4)通过自创的&鸡蛋清外敷法&在真空镀膜台上对纳米氧化锆粉体进行包敷碳颗粒的表面处理，并采用真空烧结工艺制得相应烧结体，初步开始解决陶瓷烧结过程中团聚长大这一传统难题；(5)通过分析纳米颗粒在制备烧结体过程中的实际特点，提出了&三球烧结数学模型&，通过引入坯体相对密度和孔隙率的相对关系分析并通过自行编写的数学拟合软件，验证了这一数学模型。

The research work in this dissertation covers a wide range: from tetrazole derivatives to their complexes, from the static structure properties to dynamic properties, from gaseous phase to condensed state and from fundamental physical chemical properties to explosive performance.

通过大量计算研究，从各类衍生物到它们的配合物、从气相到液相、从静态到动态、从一般物理化学性质到爆炸性质，在占有文献和计算数据的基础上，进行分析比较和论证，导致如下主要结果和结论。

The theoretical properties of BTATz were estimated by a B3LYP method based on 6-31G basis set. The stable geometric configuration and bond order were obtained. The vibrational frequencies, IR spectrum and thermodynamics properties under different temperatures were obtained from vibrational analysis, and the relationship between temperature and thermodynamics properties was deducted. Pyrolysis mechanism of BTATz was discussed, and the transition state and activation energy of ring opening reaction of the tetrazole were deducted.

用B3LYP方法，在6-31G基组水平上对其性能进行了计算，得到了其稳定的几何构型和键级；在振动分析的基础上求得体系的振动频率、IR谱及不同温度下的热力学性质，并得到了温度对热力学性能影响的关系式；探讨了其热解机理，推断出四唑环开环时的过渡态和活化能。

Their tribological properties in paraffin and water were investigated with a four-ball test machine, the results shown that the thiadiazole derivatives and the imidazoline borates have better friction reduction and antiwear properties, and the thiadiazole derivatives also have excellent extreme pressure properties in water.

通过在四球摩擦磨损试验机上评价上述两类衍生物分散在液体石腊及水中的抗磨减摩性能，首次发现噻二唑及咪唑啉衍生物在水中也有较好的抗磨减摩性能，且噻二唑衍生物在水中具有良好的极压性能。

Database of physical and chemical properties for solid wastes were constructed through investigation for single typical component and their mixture of solid wastes. The particulate trajectory model and heat transfer model were developed, based on the studies of Characteristics of solid wastes movement and heat mass transfer in rotary kiln. Pyrolysis experiments of solid wastes in lab and pilot scale rotary kiln pyrolyzers were performed. Mechanism of pyrolysis for typical solid wastes was analyzed. The characteristics of pyrolytic products, such as physical and chemical properties, composition and combustibility, etc, were investigated. A neural network model for the prediction of yields and properties of pyrolysis products was developed. Then, the potential applications of pyrolytic products and the substitution of pyrolytic fuels for corresponding commercial furls were investigated. The optimization of energy recovery and utilization for different wastes through pyrolysis was analyzed.

通过对典型固体废物组分及其混合物特性的分析，建立了固体废物的化学特性分析数据库，并据此进行了物理分类；对固体废物在回转窑内的运动和传热特性进行了研究，建立了固体物料的随机颗粒滚动理论模型和传热模型；在小型和中试回转式热解炉上进行了实验；对各种典型固体废物在回转窑内的热解机理和主要热解产物的性质进行了研究；利用神经网络等方法建立了各典型固体废物的热解产物的产率及特性的数学预测模型；对固体废物热解产物的物性、成分、燃烧特性等开展了研究，分析了其与现有商业燃料匹配的可能性；对热解产物的多种应用性能进行了研究，对不同废物热解中的能源回收和利用进行了优化分析。

Contemporary Blaise Pascal said that I cannot forgive Descartes; in all his philosophy he did his best to dispense with God.

同时代人伯莱赛？帕斯卡说：我不能原谅笛卡尔；在其所有的哲学中他无择手段地废除上帝。

Here's the reality. Neither Bernanke's interest rate cuts nor the federal stimulus package likely will hit the policy nail right on the head.

这是现实。无论伯南克的减息，也不是联邦刺激计划可能会触及政策钉权的头部。