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Through designing of composition and structure of the bioactive graded coating,innerstress and its distribution in the coating were analyzed and calculated, the resultsshowed that when composition distribution coefficient n was 1.5, a reasonable stressdistribution could be got, that was at the beginning of deposition the suspension containingrichly BG granules was used so that a rich BG granules layer, a good transitional layerbetween BG layer at the bottom and the coating could be obtained at the titanium alloy side,the bottom of the coating; the stress value near the interface and surface and its character,pressure stress or tensile stress, were decided by the character of its composition itself.Changing composition distribution coefficient n could only change the variation tendency ofstress in the coating, but did not change the stress distribution rule in the coating. Thethinner the coating is, the sharper stress variation in the coating is, which does not mean thatthicker coating is better because the thicker the coating is, the little the permitteddeformation of coating is, so the coating thickness should be thinner, for example, about50μm for bending applications, but for applications only bearing pure shear stress, such asroot of tooth implant, the coating can be thicker little, for instance, about 80~100μm. The study on electrification characteristic and electrophoresis deposition of HAand BG granules in aqueous and non-aqueous solution system found that EPD almost didn'toccur in aqueous solution system. However, because HA granules take position charges inabsolute alcohol, a homogeneous EPD be carried out on the cathode titanium alloy slice, but taking negative charge in absolute alcohol the BG granules not be deposited on the cathode. A guided HA crystallizing, 100~300nm, on surface of the BG granules be realized by metathetical reaction, which cover BG granules with HA microcrystals and make the covered BG granules taking position charges in absolute alcohol, sequentially realize the EPCD of the BG and HA granules on the cathode, so it is feasible to make a titanium alloy/BG/HA bioactive graded coating by making use of EPCD technology. The corrosion experiment of rich boron bioglass coating and plasma spray coating showed that split phase, rich boron and rich silicon phase, occurred during its preparation. In basic medium the corrosion behavior of 〓 BG coating showed uniformity corrosion, the corrosion mostly occurred at rich boron phase area, therefore batch formula design of BGshould avoid the occurring of split phase. The corrosion appearance of plasma spray coatingappeared a non-uniform corrosion, mostly occurred at the edge of the laminated HA moltendrops, and emerged an accelerated corrosion tendency, which will easyly lead to corrosioncrackles extending to the interface and the happening of osmotic interfacial corrosion, thatmay be one of the major reasons leading to the coating cracking-off in the later period. Thetesting results of thermal expansion coefficient of 〓 and 〓BG showed the thermalexpansion coefficient of 〓 BG matched with that of titanium alloy better, and 〓 BG couldsinter with titanium alloy into densification enamel layer at low temperature (720℃).
将Ti6Al4V合金在1000℃下进行真空热处理会降低其力学性能,且合金内的V元素会向表面富集,因此,钛合金真空热处理和表面涂层的烧结温度不能过高,即应低于其相转变点;通过对生物活性梯度涂层的组成和结构的设计,分析和计算了梯度涂层内的应力大小和分布,结果表明:对于本研究,当成分分布系数n=1.5时,可以获得较合理的涂层力学性能,即在沉积开始时,采用富含BG颗粒的悬浮液,以便在钛合金侧获得同底层BG有良好过渡的富BG涂层;梯度涂层界面和表面的应力大小、性质由材料组成本身的性质决定,改变成分分布系数,只能改变涂层内应力变化的趋势;涂层的厚薄不影响涂层内的应力分布规律,但涂层越薄,涂层内的应力变化越快,但这并不意味着涂层越厚越好,因为涂层越厚,涂层允许的变形越小,对于应用于弯曲受力部位的涂层而言,涂层应薄一点为好(50μm);而对于仅纯受剪切应力的部位,如牙根种植体,涂层可适当加厚(80~100μm);通过对HA和BG颗粒在水溶液体系和非水溶液体系中的带电特性和电泳沉积的研究发现,它们在水溶液体系中很难发生电沉积;在无水乙醇溶液中,HA颗粒带正电,可在阴极钛合金片上发生均匀的电泳沉积,而BG颗粒则带负电荷;利用复分解反应法,可以制得100~300nm的HA,通过诱导HA在BG颗粒表面结晶,可对BG颗粒进行表面包覆,获得了被HA包覆的BG颗粒,改变了BG颗粒表面的带电特性,使BG和HA颗粒在无水乙醇中均带上正电荷,从而实现了HA和BG颗粒在阴极上的共沉积。
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Research on the related attribute of evidence, influence and method of dealing with is carried out. Result of experiment demonstrates that the method can lead to the reliable decision effectively. Aiming at conflicting problem of decision making, fusion strategy of BPA reassign is adopted in coordinator of GDSS. Aiming at contradictory of decision-making, the process of decision-making is divided into two stages that are learning and decision-making. Each Agent is trained by proper information given by training example to eliminate contradictories among decision-making Agents and correct mistakes that ensure Agents cooperate effectively in the stage of cooperating decision.(3) In order to overcome the flaw of current GDSS that can only support static problem solving, adopting the method that combing Multi-Decision-Making-Agents Reinforcement Learning and the metempirical knowledge learning, the paper puts forward Reinforcement Learning and optimization under dynamic environment.
提出采用证据理论的证据合成作为协调器中决策Agent的融合策略,对群体决策支持系统的协调器进行决策融合过程中可能出现的情况进行了详细的分析,研究了证据的相关性及其在决策融合过程中的影响,提出了相关证据的处理方法,实验结果表明,该方法可有效保证决策结果的可靠性;针对决策过程中的冲突问题,提出协调器采用基本信任指派二次分配的协调策略;针对决策过程中的矛盾,提出将决策过程分为学习和决策两个阶段,各决策者Agent根据有限的训练样本所给出的正确信息进行训练,消除决策者Agent之间的矛盾和修正决策者Agent自身的错误,从而保证合作决策阶段实现有效的合作决策。
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Optimized and calculated geometric structure and infrared spectrum of benzoic acid molecule with density functional B3LYP method on 6-311G ** base cluster level,and compared the calculated infrared frequency of each conformation of benzoic acid with actually-measured infrared spectrum,thus determined molecula.
用密度泛函 B3LYP方法在6-311G**基组水平上对苯甲酸分子的几何结构和红外光谱进行了优化和计算,并将计算所得的苯甲酸各构象的红外频率与其实测的红外光谱进行比较,确定了在晶体中苯甲酸的分子结构,同时在计算中给出了各种频率所对应的红外强度,对光谱进行了归属。
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Effect of inoculation with phosphate-solubilizing bacteria and soil acidification on the growth of Stylosanthes guianensis Reyan No.2
我国地表水体污染普遍严重,水环境生态质量不断恶化,影响水体正常使用功能;另外,沉积物中磷的再释放是影响水体水质的重要原因,而沉积物中的磷细菌对磷的吸收、贮存和释放在磷循环中起着极其重要的作用,为此本研究针对地表水体水质改善技术及沉积物中磷细菌作用分别进行了研究,并选择在杭州市内河进行了水质改善的技术实践,主要成果如下:(1)在室内模拟条件下,分别设置了高溶解氧7。
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As to the high polarity, high boiling point resultant—trimesic acid, the analysis methods of infrared spetrum, gas chromatography-mass spectroscopy, vapour-phase chromatography, acid number titration and so on are seperately used to characterize its property. Infrared spetrum and gas chromatography-mass spectroscopy are used to have a qualitative analysis on the resultant and are compared with the stand diagram. Sulfuric acid-methanol esterification and rapid esterification are used to prepare the trimesic acid trimethyl-ester and have a FID quantitative analysis. So that we make sure the purity of trimesic acid in the resultant and also we have an acid alkali titration on the resultant to get its acid number, in order to verify the purity of trimesic acid in the resultant.
对于高极性、高沸点的固体产物均苯三甲酸,分别采用红外光谱、气质联用、气相色谱、酸值滴定等分析手段进行了表征:利用红外光谱、气质联用的方法进行产物的定性分析,并与在同一仪器、同一条件下做出的标准谱图进行比对;采用硫酸-甲醇酯化法和快速酯化法制备出均苯三甲酸三甲酯,对其进行气相色谱FID定量分析,进而确定固体产物中均苯三甲酸的纯度;用酸碱滴定法确定固体产物的酸值,以对固体产物中均苯三甲酸的纯度进行验证。
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The present invention is characterized in that the ammonium metatungstate powders and the cobltic-nitrate powders are respectively dissolved in the water and scattered in the liquid nitrogen to be pre-frozen using a nitrogen spray gun after being mixed and defecated, and then are placed in a freezedryer to be dried vacuumly and finally the powders are obtained. The nanometer powder i.e. the nano tungsten-cobalt composite powder is obtained by reducing the freeze-dried mixed powder in the atmosphere of hydrogen.
该微晶硬质合金的制备方法特征为:将偏钨酸铵粉末与硝酸高钴粉末分别溶于水中,混合澄清后使用氮气喷枪,将其分散在液氮中预冻后置于冻干机中进行真空干燥得到粉末;在氢气气氛中对冻干的混合粉末进行还原得到纳米粉体,即钨钴纳米复合粉体。
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There were three femoral nerve palsies, each of which also completely resolved. There were two periprosthetic femoral shaft fractures; one occurred intraoperatively and was treated with cerclage wiring, and one presented one month after surgery and was treated with open plate fixation and cerclage wiring.
股神经麻痹3例,每例都进行了完全的松解;假体周围股骨干骨折2例,其中1例发生在手术中,用环扎钢丝进行处理,1例发生在术后1个月,进行了切开复位钢板内固定和钢丝环扎。
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There were three femoral nere palsies, each of which also completely resoled. There were two periprosthetic femoral shaft fractures; one occurred intraoperatiely and was treated with cerclage wiring, and one presented one month after surgery and was treated with open plate fixation and cerclage wiring.
股神经麻痹3例,每例都进行了完全的松解;假体周围股骨干骨折2例,其中1例发生在手术中,用环扎钢丝进行处理,1例发生在术后1个月,进行了切开复位钢板内固定和钢丝环扎。
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The modular design of printNet system is divided into several application part, such as data processing tools, design tools, products, Business card printing tools, and solutions to technical tools, of which the highest is a design tool over the actions that it printLayout from page formatting and setting variables, but also can be used by an operator in a transform tool programming, so that the contents of the variables in a database in output for operations, now produetion of mostly to one-dimensional bar codes and encrypted bit or anti-false, the party is a method in the bar code by addition, subtraction, multiplication, Division, opinins Mo, and so after the results or the results of data, or the result is converted to the data that corresponds to a location in one of the ntehs detection accuracy is valid, just make a bit of the inverse operation, the operation that results in comparison with the original data, such as the same as the data is valid, such as different then the data is not valid, this scenario is the most simple and most primitive anti-counterfeit. PrintNet software to complex product environment " interpuntion and output the integration of integrated management " solution possible.
printNet系统的模块式设计分为几个应用部分,如数据处理工具、设计工具、产品制卡工具以及方案解决工具,其中技术含量最高的是对设计工具printLayout的操作,它除了设计页面格式和设置变量外,还可由操作员在转换工具中编程,以便对数据库中的变量内容在输出时进行运算操作,现在生产中应用的大多是给一维条码加校验位或是防伪加密,其方一法是将条码中的数据经过加、减、乘、除、取莫等运算后,将结果或将结果中的几位至于数据后,或将结果转换成对应符号放在数据中的某个位置,如须检测某一数据是否准确有效,只要把校验位上的数进行逆运算,把运算结果与原数据比较,如相同则数据有效,如不同则数据无效,这种方案是最简单最原始的防伪加密的方法。printNet软件系统使得在复杂产品环境下的&排版与输出一体管理&的集成解决方案成为可能。
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The design of the dry-dock falling gate"s structure is researched, and integrates the disquisitions and analysis on the dynamic characteristics about dock gate, in order to make the cabin design more visualizing.(2) The emphasis of this paper is the influence of the water hole and gas hole in the tidal cabin and the influence of the drain of the air-operated cabin.(3) In this paper, the building method of the dry-dock falling gate"s parametric model is studied and the dynamic analysis is accomplished in ADAMS, furthermore, the rising-and-falling angle curve is drawn while the dry dock gate is rising and falling.(4) The paper is based on the apprehension of the past theories and researches about air-operated dry-dock falling gate, and is explicated by hydraulic rationales and rising-and-falling mechanical principles. This software is developed by inner programming language in ADAMS and VC. This design could shorten design cycle.
1研究了气控式干船坞卧倒门的结构设计,整合对卧倒门在海水中运动中的动力特性研究,使卧倒门的设计,特别使其舱格设计更具可视化;(2)重点讨论潮汐舱水孔气孔对卧倒门水上运动的影响,空气操作舱充排水对卧倒门运动的影响;(3)研究了气控式干船坞卧倒门仿真模型的参数化方法和过程,并在ADAMS中完成了系统的动力学分析,绘制出了卧倒门在起卧过程中的运动特性曲线;(4)通过对已有的气控式干船坞卧倒门的实验成果和成形理论的解读,在理解其起浮和卧倒机理基础上,应用VC和ADAMS二次开发语言进行设计软件开发,定制了友好的用户化中文人机交互界面,使设计人员可以方便快捷地对卧倒门门进行设计开发,缩短了设计周期。
- 推荐网络例句
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And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.
47:5 法老对约瑟说,你父亲和你弟兄们到你这里来了。
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Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.
提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法,同时,采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。
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Hey Big Raven, The individual lies dont matter anymore - its ALL a tissue of lies in support of...
嘿大乌鸦,个别谎言的事不要再-其所有的组织的谎言,在支持。