超声波的

In recent years, companies step up the development of the fast lane: the completion of the production run has been an annual output of 150,000 tons of pig iron smelting companies; under construction, the modernization of 30,000 tons annual output of castings and machining parts auto parts company has advanced Vertical shot molding pressure, the level of sub-type microseism compaction modeling line, self-hardening resin sand molding line, dual power supply frequency melting furnace, sand automated treatment systems, as well as CNC machining centers and machining equipment production lines production equipment, with direct-reading spectrometer, casthouse Express analyzer, Coordinate measuring instrument, ultrasonic flaw detector such as the modernization of non-destructive testing equipment and a full range of conventional detection equipment; at the same time the company has a skilled use of CAD / CMD technology design, manufacturing, machining workforce and more than ten years such as day, love and respect their jobs, and accumulated rich experience in foundry staff.

近年来，公司步上了发展的快车道：建成了已投产运行的年产15万吨生铁的冶炼公司；正在建设的现代化的年产30000吨铸件和机加工件的汽车零部件公司拥有先进的垂直分型射压造型线、水平分型微震压实造型线、自硬树脂砂造型线、双供电中频熔化炉、自动化的砂处理系统以及加工中心和数控设备组成的机加工生产线等生产设备，拥有直读式光谱仪、炉前快速分析仪、三坐标测量仪、超声波无损探伤仪等现代化的检测设备和齐全的常规检测设备；同时公司拥有一支熟练运用CAD/CMD技术进行设计、制造、机械加工的员工队伍和十几年如一日、爱岗敬业、积累了丰富经验的铸造员工队伍。

A basic knowledge of microbiology, will be detected with a microscope observation of micro-organisms, medium Preparation, disinfection and sterilization, separation and purification of micro-organisms, bacteria counting method A chemical analysis of the theoretical knowledge and can use chemical analysis methods and equipment of the components of material analysis Master fermentation process principles, understanding of beer, liquor, fermentation production technology Master protein related knowledge, PAGE gel electrophoresis technology, high-speed centrifugal Genetic engineering master the basic theory of knowledge, the extraction and purification of genes, PCR principle, gene recombination technology Master of the basic theoretical knowledge, the immobilized enzyme, the enzyme preparation Application Master of animal and plant tissue culture techniques of experimental steps studied experimental apparatus: Balance (scales, electronic scales, Analytical Balance), or acidity, spectrophotometer, liquid gas chromatography, acid-base titration apparatus, microscopes, centrifuges, ultrasonic cleaning, constant temperature oscillation incubator, super-clean table, steam sterilization pot, the pot constant temperature water bath, PAGE device apparatus, oven, fermenter, such as PCR instrument.

具备微生物理论基础知识，会用显微镜检测观察微生物，培养基的制备、消毒与灭菌，分离与纯化微生物，细菌的计数法具备分析化学的理论知识，能运用化学分析和仪器分析方法对物质的组分进行分析掌握发酵工艺原理，了解啤酒、白酒、发酵生产工艺掌握蛋白质相关知识，PAGE凝胶电泳技术，高速离心掌握基因工程的基本理论知识，基因的提取和纯化，PCR技术原理，基因重组技术掌握酶的基本理论知识，酶的固定化方法，酶制剂的应用掌握动植物组织培养技术的实验步骤学过的实验仪器：天平（台天平，电子天平，分析天平）、酸度计、分光光度计、液气相色谱仪，酸碱滴定仪器，显微镜，离心机，超声波清洗器、恒温振荡培养箱、超净工作台，蒸气灭菌锅、恒温水浴锅，PAGE电泳装置仪器、干燥箱、发酵罐、PCR扩增仪等。

The dissipation factor tip-up D tan d , the change of capacitance D C / C 0, the maximum discharge q max and the mean discharge magnitude q mean , A compared investigation of the correlations between V min , V av and service time were compared with those between D tan d , D C / C 0, q max, q mean and respectively.

对大量的不同运行年数的线棒进行了超声波 V min 和 V av 测量，以及介质损耗角增量 D tan d 、电容变化率 D C / C 0、最大放电量 q max 和平均放电量 q mean 等电气测量试验，对比研究了超声参数( V min 和 V av )和电气测量参数( D tan d 、 D C / C 0、 q max 和 q mean )与运行年数的相关性，发现， V min 和 V av 与的相关性很强，相关系数 R 分别为0.892和0.890，而 D tan d 、 q max 和 q mean 与的相关性较弱， R 在0.55~0.60范围内， D C / C 0与几乎没有相关性， R 仅为0.310；采用线性回归分析，分别建立了 V min 和 V av 与的二阶和三阶线性函数的数学模型， R-S 分别为0.828和0.903，并分别提出了最可靠运行年数和置信度为95％的可靠运行年数的预测方法。

Preparation of the cathode includes:shaping under the press of 40Mpa, sintering at 550℃for 1 hour and at 900℃for 8 hours and threading with molybdenum bar; Considering the literatures we choose CaCl2 as salt for preparation titanium. Pretreatment of salt is for 1 hour at 100℃and for 2 hours at 300℃. Partial pressure of oxygen which need lower than 5.11×10-7Pa to reduct titanium oxides and hygroscopic property of salt need a sealed equipment to electrolyse. And finally successfully designed a satisfied one and the results show that the equipment can be satisfied the requirment of the experiment. Flow of the inert gas is 1.5L/min, the voltage is 2.8 V, temperature is 850℃and time is 2 hours during pre-electrolysis. Flow of the inert gas is 0.2L/min, the voltage is 3.1 V, temperature is 900℃and time changes with the mass of TiO2 during electrolysis, namely the greater need the longer time; To eliminate influence of salt and other impurities, the products need to wash with distilled water and dilute chlorhydric acid , then wash with dilute hydrochloric acid under supersonic wave assistant. Finally, electrometical properties of the electrolysis of TiO2 is researched by cyclic voltammetry and chronoamperometry, and results show that there are two main reodox steps, namely from TiO2 to TiO and from TiO to Ti.

阴极制备主要包括40MPa压力下模压成型、两段式烧结(1小时内升至550℃保温1小时，再1小时升温至900℃保温8小时)及烧结后TiO2块打孔用钼棒串接三个主要环节；实验中选用CaCl2作为电解熔盐，并对其进行预处理(100℃，保温1小时； 300℃，保温2小时)；经热力学计算，还原钛氧化物的氧分压至少要低于5.11×10-7Pa，结合电解过程中所用熔盐CaCl2有极强的吸水性的特点，电解装置应有较高的密封性，自行设计了一套密封性可靠的电解装置，便于实验过程中熔盐预处理和氧分压的控制；通过干燥处理预电解过程中Ar流量大约为1.5L/min、电压为2.8 V、温度为850℃、时间为2小时，电解过程中Ar流量大约为0.2L/min、电压为3.1V、温度为900℃，实验结果表明电解时间与TiO2质量密切相关，质量越大需要电解的时间越长；通过自来水冲洗—稀盐酸浸泡、洗涤—在超声波辅助作用下稀盐酸洗涤，可减少熔盐及其它杂质对电解产物检测结果的影响；最后，通过循环伏安法、计时电流法对电解机理的研究，确定电解还原TiO2制备金属钛主要经历了TiO2-TiO-Ti的过程。

Prospect future, super voice the wave spread the feeling machine conduct and actions a kind of new count for much and useful tool and will have very big development space in everyone's noodles, it wears the dynasty more high to position the direction development of the high accuracy to develop increasingly by satisfy of social need is basic such as the development trend of the sonar is:Develop to have higher fixed position accuracy of passive measure to be apart from sonar to carry out the demand of whole concealment attacks by satisfying weapon in water;Continue to develop the submarine of the adoption low frequency line table examination to drag the line array sonar, carry out super long range of passive probe into and identify;Develop the submarine sonar of the more suitable for neritic work, resolve the target in the neritic water to identify a problem especially;Lower a submarine strongly from the bad voice, the work environment of the improvement submarine sonar.

展望未来，超声波传感器作为一种新型的非常重要有用的工具在各方面都将有很大的发展空间，它将朝着更加高定位高精度的方向发展，以满足日益发展的社会需求，如声纳的发展趋势基本为：研制具有更高定位精度的被动测距声纳，以满足水中武器实施全隐蔽攻击的需要；继续发展采用低频线谱检测的潜艇拖曳线列阵声纳，实现超远程的被动探测和识别；研制更适合于浅海工作的潜艇声纳，特别是解决浅海水中目标识别问题；大力降低潜艇自噪声，改善潜艇声纳的工作环境。

Two times hydrolyzation of Fe~(3+) and Cr~(3+) was firstly pointed out in the process of pillar preparation with hydrothermal method. In order to improve the thermal stability, Fe/Cr-Si-pillaring agent solution was synthesized by hydrolyzing Fe~(3+) and Cr~(3+) solution on the surface of silica sol, and Fe/Cr-Si-pillared montmorillonite (Fe/Cr-Si-PILM) was prepared with conventional method and hydrothermal method. Because the technical innovation of preparation is the best way to improve the PILM properties, two novel methods (Microwave method and Ultrasonication method) have been studied to synthesize Fe/Cr-PILM.In order to expand PILMs new application in the field of coal conversion, catalytic activity of Fe/Cr-Si-PILM catalyst in LongKou lignite and ShenHua coal residue liquefaction was discussed and characterized in the last part of this paper.

研究证明：蒙脱石的预处理是可行的，我们以预处理后的Ca-M为原料，研究并优化了PILM的水热法制备工艺，提出了金属离子的二次水解法；为了提高PILM的热稳定性，我们自制了硅溶胶，合成了Fe／Cr-Si三元复合柱化剂，并制备了Fe／Cr-Si-PILM；在PILM合成中，制备技术的革新是改进PILM性能的重要方法，为此我们探索了微波合成法和超声波合成法在制备Fe／Cr-PILM中的应用；最后，我们选择龙口褐煤和神华煤液化残渣为研究对象，探索了Fe／Cr-Si-PILM催化剂在煤炭液化中的应用，希望能开拓PILM应用的新领域。

This paper described the principle of plane ultrasonic spreading abroad in the liquid coming into being ultrasonic grating,educed the density and refractive index changing rule basis continuity equation of not-ideal liquid and Lorentz-Lorenz law,expressing the transformation of the index and refractive index satisfaction similar equation of standing wave,and described the relation curve of the standing wave form at a few special times,liquid density and refractive index periodic variety according to the res...

描述了平面超声波在液体里传播形成超声光栅的原理；根据非理想流体对应的连续性方程和Lorentz-Lorenz定律，推导了液体光栅中液体密度与折射率的周期性变化规律，表明液体密度和折射率变化满足相似的驻波方程；根据推导的结果描绘了几个特殊时刻的驻波波形、液体密度、折射率周期性变化之间的关系曲线；进而由折射率周期性变化规律分析了超声驻波自身像的形成原理，并给出了CGS型超声光栅声速仪利用超声驻波自身像测量声速的方法与实验结果。

In the process of building and using the mass concrete structures, because of the effect of out-side condition and themselves, some faults will form in the structure, these faults will effect the bearing capability and endurance Using nondestructive testing method to test the concrete"s quality and diagnose its healthy, which has the significant sense in assessing the safety stability and research of the administering diseasesThis dissertation mostly researched the testing methods in the mass concrete structure, discussed the principles, methods, features, sphere of application of the ultrasonic testing in the mass concrete structure with faults, used dynamic FEM to simulate the testing process, discussed when the concrete structure with cracks is under the effect of the pulse, how the elastic waves propagate and what are their changing feature, Researched the principles of the first-arriving waves" phase when the cracks" depths are not same, obtained the relation between the inversion point and the cracks" depth, which has the direction sense in the application of projects,The second part of this dissertation is CT , which used the ultrasonic wave running through the tested-substance to get arriving-time of the ultrasonic wave, then inverse the image This dissertation drawed one CT program which can well present the different little cells ultrasonic wave velocity profiles of the substance, thereby to diagnose the quality of the part of the tested-substance, CT has the better using foreground..

在混凝土结构的施工及使用过程中，由于受其自身及外界各种因素的影响，常常会产生一些缺陷，对结构物的承载能力和耐久性造成严重影响，采用无损检测技术进行质量检测和健康诊断，这对混凝土结构开展安全、稳定性评估以及病害隐患治理研究具有重要意义。本论文主要针对大体积混凝土结构缺陷的检测方法展开研究工作，重点讨论了超声波法检测混凝土结构裂缝的基本原理和方法及其特点、适用范围，运用动力有限元数值模拟其检测过程，探讨了有裂缝缺陷的混凝土结构在脉冲荷载作用下弹性波的传播及其变化特征，研究了不同裂缝深度下首波相位变化规律，得出了反转临界点与裂缝深度之间的关系，这对实际工程应用具有指导意义。声波CT是一种新的无损检测技术，它是利用声波穿透被检测体获取声波接收时间，来进行计算机反演成像的技术。本文利用直射线法编制了层析成像程序，能较好地呈现被检测物体各微小单元的声波速度分布图像，从而对检测体的质量状况作出诊断评估，具有较好的应用发展前景。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新