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Combining the performance evaluation (activity, selectivity and stability) and the characterization of the catalysts (XRD, TPD, FTIR and the pore structure measure), it can be concluded that :(1)The activity of modified β is higher than MCM-22, but the selectivity of ethylbenzene is lower about 3% than that of MCM-22;(2)The mounts of diethylbenzene and the other by-products are higher 1.7 times and 1.5 times than these of MCM-22 respectively;(3)The catalytic performance of zeolite mixture is nearly equal to modified β, but the selectivity of ethylbenzene is higher about 0.5% than that of modified β;(4)The catalytic activity of zeolite is mainly correlated with the number of acid sites, strength and distribution, and the distribution of products is determined by the binding energy of ethylbenzene and the pore structure, while the stability of catalyst is affected by the amount of poly-ring aromatic alkylate and the pore structure.
以性能评价和特性表征(XRD、TPD、FTIR和孔结构测定)相结合的方式,对上述三种催化剂性能比较的结果表明:(1)改性的活性明显高于MCM-22,但乙苯选择性却低于MCM-22绝对差约3%;(2)改性(上二乙苯和其他副产物的生成量分别约为MCM-22上对应值的1.7和1.5倍左右;(3)混合型催化剂的性能与改性相仿,但乙苯选择性提高0.5%左右;(4)对乙苯合成,沸石催化剂的活性主要取决于其B酸中心数、酸强度及酸分布,产物分布则取决于催化剂表面的乙苯脱附能垒值和孔道结构,而稠环芳烃的生成量和催化剂孔道结构是影响催化剂稳定性的主要因素。
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Electric remote control device adjustment is used, General monlchamus tuhung seat mounted above the keybed-iron plate, covering a hard plastic, and a flexible plastic to prevent ink seepage, each iron plate is fitted with a front end, eccentric roller roller bearing rings on both sides of the plastic top tight in tuhung roll, bucket seat is fitted with a total of 30 to 32 of these eccentric roll, each of which the width of the eccentric roll and 30 ~ 32 mm, when servo motor signal receiving console by mechanical structure, change the eccentric roller and rollers of the gap, so that once the monlchamus tuhung-high ink, led, according to the extruded plastic clearance form different deposit, attachthemselves in tuhung roll, roll over the ink input ink this structure is characterized by correctly restrict each supply the location of the monlchamus region of adjustment on the nearby monlchamus area for inking, plastic affected by friction, easy-to-wear constantly, you need to change on a regular basis.
而电不静调度是用遥控安拆来举行的,凡是的不朱斗座底下拆有一排琴键式铁板,暗不天包围一张软塑料片,而塑料片具有不塑性,制止油不朱的渗漏,每块铁板的前端拆有一个公道辊,辊双方的支承环不兵塑料片底不松在不朱斗辊上,不朱斗座上共拆有30~32个公道辊,每个公道辊的宽度约为30~32mm,当伺服电机剥夺把持台的暗记后,堵住板滞布局,保持公道辊与不朱辊的间隙,因此当不朱斗辊不静弹时,不静员油不朱挤不抬塑料片,不梢据间隙巨细变成差别不朱层厚度,附着在不朱斗辊上,堵住传不朱辊不输出匀不朱机构,这栽布局的特不面是可以不差不天不拘每个不求不朱区的场所,制止一个不朱区的调度差附近不朱区不求不朱度爆发感化,塑料片受到不停摩擦,难磨损,需按期调换。
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Authorities shall consider all available evidence on the proper allocation of costs, including that which is made available by the exporter or producer in the course of the investigation provided that such allocations have been historically utilized by the exporter or producer, in particular in relation to establishing appropriate amortization and depreciation periods and allowances for capital expenditures and other development costs. Unless already reflected in the cost allocations under this sub paragraph, costs shall be adjusted appropriately for those non recurring items of cost which benefit future and/or current production, or for circumstances in which costs during the period of investigation are affected by start up operations.
当局应考虑全部现有的成本适当分配的证据,包括出口商或生产商在调查过程中作出的分配证据,其前提是该分配在历史上一直被出口商或生产商所使用,特别应对有关确立适当的分期付款和折旧期限、按资费用以及其它开发成本的补助费加以考虑,除非根据本款项规定已在成本分配中得到反映,否则成本应对那些有利于将来或当前生产的非经常性项目成本作出适当的调整,或者对在调查期间成本费用因刚开始生产而受到影响的情况作出适当的调整。
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At the same time, combining with the actual condition of delivery pipeline of our country and some prevalent leak detection and location methods, this paper raised a method, which is based on wavelet analysis and negative- pressure-wave to detect and locate the leakage. Jobs in the paper are as follows:As affected by gas density, pressure, specific heat and pipe material, the velocity of negative-pressure-wave improved depending on the energy conservation. At one time, taking the affection of velocity of gas flow, the location formula was modified in some degree.When locating the leaks with location formula, the iterative approach algorithm was adopted as a new method to increase the location accuracy level of system.Multi-scale decomposition and reconstruction of wavelet transform is utilized to filter the noise of negative-pressure-wave, which was brought by leakage. With the capacity to detect the signal singularity fast and accurately, wavelet transform was used to catch the break point of pressure signal. The work improved the accuracy of At in location formula, accordingly improved the location accuracy.Wavelet is a suitable tool for signal analysis. The distinct character is that the mother-wavelet is of optional. That means choosing different mother-wavelet will get different analysis result. So we studied how to choose mother-wavelet and its scale for signal singularity detection. The method is to choose a wavelet by regularities of the wavelet and the signal.Finally, a plan, which bases on SCADA system for inspection and detection of natural gas leakage, is proposed in the article.
其中,主要进行了以下几方面的工作:针对泄漏产生的负压波在管道中的传播速度受媒介的密度、压力、比热及材质等因素的影响,而非声波在空气中传播的速度,本文利用能量守恒原理,对其进行了修正;考虑到管内气体流速对压力波速的影响,对原始的负压波定位公式进行了一定程度的改进,并在利用定位公式进行泄漏点定位时采用逐步迭代逼近算法,提高了系统的定位精度;利用小波变换的多分辨率分解和重构技术,对采集到的管道发生泄漏时产生的负压波信号进行了降噪处理;并利用小波变换技术对信号奇异点的快速、准确的识别能力,对经上述消噪后的负压波信号进行了奇异点捕捉,精确捕捉的结果提高了定位公式中上下游站点采集到的负压波奇异点的时间差△t的精度,从而进一步提高了定位的精度;考虑到小波变换是一种基波可变的信号分析工具,也就是说,不同的小波基波对信号分析的结果将有很大差别,这势必影响最终的处理结果,因此,我们又对比分析了本课题中小波基及尺度的选择问题,依据规则性系数相似性原理对母小波的选择进行了探索性研究;最后,还提出了基于SCADA的泄漏检测与定位系统的软件开发构想及系统的嵌入方案。
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Relation between geometrical contour error of inner corner and machining condition is investigated by the experimental plan of Taguchi quality design. Through the quantitative analysis, the geometrical contour error is mainly affected by wire tension and flushing pressure. By regression analysis, a mathematical model is established to estimate cutting path error of corner cutting. According to the estimated cutting path error, the program path is corrected.
研究首先以田口式品质设计实验计画法来探讨加工参数与隅角形状误差间的关系,从变异数分析的结果得知,线张力与冲水压力是对於隅角精度影响最显著因子,应用回归分析建立转角加工路径误差量估测模式,利用此模式以预测不同加工条件下隅角加工路径误差量,依据预测加工路径误差量计算轨迹补偿量,实验结果证明本文所提出轨迹补偿策略可有效提高60%之隅角加工精度。
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The author agrees with many previous investigation that the intrinsic degradation is caused by disproportionation, which is governed by the mobility of the constituent elements, which in turn is affected by the melting point, the lattice structure and the composition of the alloys.
晶格缺陷的产生和累积也是贮氢合金本征退化的一个主要机制,影响这种缺陷产生和累积的主要因素有合金的熔点、晶体结构和成分。
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First, considering the volume expansion process of corroded bolt, the displacement model of mortar inner surface leaded by bolt corrosion is established after the loss of corrosion production is denoted by a filling factor. Second, based on elastic theory, the mortar cracking process is analyzed after the concept of influence coefficient of surrounding rock is introduced in the course of analyzing, and the degree of cracking course affected by surrounding rock parameter is also analyzed; the finite element method is adopted to verify the results.
考虑锚杆锈蚀体积膨胀过程,以填充系数表示砂浆开裂过程中锚杆锈蚀产物的损失,建立了锚杆锈蚀后砂浆内部位移模型,以弹性力学为基础,引入围岩参数影响系数概念,对锚杆锈蚀导致砂浆保护层开裂过程以及围岩参数对开裂过程的影响程度等进行了分析研究,并采用有限元分析方法对其进行了验证。
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All quarrels and disputes are settled by the whole of the community affected, by the gens or the tribe , or by the gentes among themselves
一切争端和纠纷,都由当事人的全体即氏族或部落来解决,或者由各个氏族相互解决
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The products were identified by IR,NMR,MS and elemental analysis. In our method,K.OH was used in place of NaOH to synthesize benzyl ester of 3,5-dimethyl-4-hydroxybenzoic acid,2',6'-dimethyl-4'-(n-succinimidyloxycarbonyl) phenyl-acridinium-9-carboxylate was purified on a silica gel column with chloroform/ethylacetate(4:l,v/v) as eluent and further purified by triturating with hexane/acetone(2:l,v/v).The luminescence produced by DMAE-NHS is a flash light with maximumemission at 0.4s and decay half-time of 0.9s. The luminescence intensity is 6.11x10 cps/mol,which is affected by the composition of trigger and surfactant.
DMAE·NHS的合成是本论文的关键和难点,我们对文献方法进行改进:文献方法用氢氧化钠与3,5-二甲基-4-羟基苯甲酸反应制得3,5-甲基-4-羟基苯甲酸钠,再用3,5-二甲基-4-羟基苯甲酸钠与苄氯作用制备3,5-二甲基-4-羟基苯甲酸苄酯,我们用氢氧化钾代替氢氧化钠,使合成取得成功;在合成2',6'-二甲基-4'-苯基-吖啶-9-甲酸酯时,文献方法对粗产品进行两次硅胶柱层析纯化,第一次柱层析用氯仿/乙酸乙酯(4:1,Ⅴ:Ⅴ)作溶剂和淋洗剂,第二次柱层析用己烷/丙酮(2:1,Ⅴ:Ⅴ)作溶剂和淋洗剂,按照文献方法得到的不是所需要的化合物,我们只进行第一次柱层析纯化,然后用己烷/丙酮(2:1,Ⅴ:Ⅴ)进行研磨,过滤,洗涤,除去溶于己烷/丙酮(2:1,Ⅴ:Ⅴ)的部分,得到所需要的产品。
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By analyzing their testing and fracturing data,it is concluded that single infill well 's production rate is affected by its infill way and a good result could be gained where infilled at areas without being involved by water and abnormal pressure caused by water injection.
安塞油田 1996~ 1999年共打加密调整井 6 5口,通过对这些加密井的试油、压裂资料分析,认为加密井的单井产量受其加密方式的影响,在水未波及地带或注水形成的异常高压区加密均取得较好的效果。
- 相关中文对照歌词
- Affected By You Not
- 推荐网络例句
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Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.
在对危险的南部地区访问时,他斥责什叶派民兵领导人对中央集权的挑衅行为。
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In fact,I've got him on the satellite mobile right now.
实际上 我们已接通卫星可视电话了
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The enrich the peopling of Deng Xiaoping of century great person thought, it is the main component in system of theory of Deng Xiaoping economy, it is a when our country economy builds basic task important facet.
世纪伟人邓小平的富民思想,是邓小平经济理论体系中的重要组成部分,是我国经济建设根本任务的一个重要方面。