可计算

In the case of study, the better fittable algorithm of volume visualization is selected in accordance with the analysis of the software.

三维可视化是科学计算可视化和三维GIS密切联系的纽带，本文综述该方面的发展趋势，研究了两大类三维数据场可视化算法：表面拟合方法(Surface-fitting method)和直接体绘制(Direct Volume Rendering，DVR)。

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。

In designing process, it will waste time on determining parting directions. For this reason, we generate a method for checking partibility by using the relations of the normal vectors of shapes. If the mold was decided as partible object, the process would evaluating the range of the parting directions. Also, the result of parting directions will be demostrated by one cone named parting cone. The total procedures of determining partibililty require O time.

基於这样的原因，本文提出一个判断可脱模性的方法，利用自由曲面上三角化之后所得到的法向量的分布情形，进行运算，若判断为可脱模模型，并计算出可脱模模型的脱模范围，使用圆锥表示之，此圆锥既称为脱模角，过程所需的时间复杂度为O；若判断为不可脱模模型则所需要的时间复杂度为O。

The geometry of canopy and interception of photosynthetically active radiation were measured.

通过实测和理论计算，结果表明：高原地区冬小麦叶片比平原地区的更趋于直立，具有比平原地区低的消光系数，能够容纳较大的绿叶面积和有效穗数；当冠层对PAR的截获率趋于饱和时，高原地区麦田可容纳的最大绿叶面积可达8.6，是平原地区的1.4倍左右；开花到成熟期间的叶日积大约可达平原地区的2倍，绿叶面积持续时间长；整个生长季期间，高原地区的PAR总量是平原地区的1.7倍，单位绿叶面积所截获的PAR是平原地区的1.3倍，又由于其叶片的趋于直立，故从上到下叶片受光比平原地区更均匀和充分，群体光合潜力高，对PAR的利用率更高。

Supposing that a unit represented by a transition is restorable,reliability and maintenance degree of a transition obeys Weibull distribution and lognormal distribution respectively,and then the concept of generalized maintenance time is put forward,and the steady state availability formulas of a unit and a system are obtained respectively.

假设SPN中变迁所代表的单元是可修复的，变迁的可靠度服从威布尔分布，维修度服从对数正态分布，在此基础上提出广义维修时间的概念，并得到了单元稳态可用度、系统稳态可用度计算方法。

In this paper, firstly, that is analyzed which is the systemic composition of cluster network parallel computing, message passing environment: PVM, parallel programming of PVM on Win32 platform, scheduling strategy of load balancing and the general model of scheduling problem and stimulatingly the factors affecting the scheduling efficiency are summarized.

基于上述工作，结合&网络并行计算的可视化研究&问题，在可移植异构的并行开发环境PVM，本文设计和开发了一个可视化的并行调度程序。程序用C++编写，通过渊用PVM库函数提供对并行虚拟机的访问。

The third part: This part is trying to penetrate to the fix of theoretical value of the convertible bonds, in the light of analyzing the convertible bonds of the Shanghai international airport stock Ltd. Co. According to the set price formula we"re given, this essay firstly calculates the value of the common transmittable bonds in the airport, then probes into how to fix the convertible company"s bond theory value thoroughly in practice.

第三部分以上海国际机场股份有限公司发行的可转换公司债券为例，推篡硕士学位论文MASTER'5 THESIS导计算出的上海国际机场股份有限公司发行的可转换公司债券的理论价值，深入探讨了可转换公司债券理论价值的实践确定。

The research which is the important part of the tunable erbium-doped fiber laser is composed of two main parts: 1. the gain part of the tunable erbium-doped fiber laser, which in fact is an erbium-doped fiber amplifier, its output characteristics are discussed both in theory and experiment, and the differences are also discussed between theory and experiment; 2. the saturated absorber part of the tunable erbium-doped fiber laser, also the part to narrow the line width of the fiber laser. The line-width narrowing mechanism in fiber laser induced by unpumped Er-doped fiber is presented from the aspect of coupling wave equation, and the main factor is considered as the standing wave induced by interference. The line-width is narrower when the standing wave is stronger, and the narrowing effect disappears with the disappearance of the standing wave. In the experiment, when adding a Faraday mirror in the laser cavity to remove the standing wave , the narrowing effect disappears. So the theory is proved by the result of the experiment.

本课题的研究内容是集成光学声光可调谐掺铒光纤激光器的重要组成部分，主要分两部分：1、声光可调谐掺铒光纤激光器中增益部分的研究，相当于对掺铒光纤放大器的研究，理论上对掺铒光纤放大器的输出特性进行分析，实验上实现了掺铒光纤放大器系统，并将实验数据与理论计算数据进行对比，分析了误差产生原因；2、声光可调谐掺铒光纤激光器中饱和吸收体部分的研究，即压窄光纤激光器输出线宽的研究，从耦合波方程出发，理论上解释了未泵浦掺铒光纤压窄光纤激光器线宽的原理，分析了影响该作用的主要因素是未泵浦掺铒光纤中相对传输的光干涉形成的驻波：驻波越强，压窄效果越好，相反当没有驻波时，没有压窄效果，在实验上通过在激光器腔内加入法拉第旋转镜使驻波消失，同时压窄效果消失，从而验证了理论分析的正确性。

Using the "attractiveness - strength of the market" indicators and fuzzy math method, the paper calculated the sustainable potential of the development of tourism of historical and cultural village, classifies its elements\' combination through the "M-R" situation matrix, the existence of an ideal type and transformation possibility proves the interdependence between tourism development and heritage protection; establishes a index system about sustainable development of tourism, valuates the situation of sustainable development of the seven historical and cultural villages using factor analysis method, combines its status and potential with "S-P" situation matrix, and disport the sustainable development into four kinds: strong synchronous, weak synchronous, strong-dislocation and weak-dislocation.

其次，提出旅游发展的层次性是历史文化名村聚落、遗产和旅游属性整体性的集中表现，依此构建了评价旅游可持续发展现状的指标体系，用因子分析法计算了7个历史文化名村的旅游可持续发展现状，对现状和潜力进行组合，在&S-P&状况矩阵中按其组合状态将历史文化名村可持续发展分为强同步型、弱同步型、强错位型和弱错位型四种类型，强同步型及良性转化路径的存在，证明了聚落属性、遗产属性和旅游资源属性的整合是可行的。

Finally, a practical seismic analysis method is presented. Through a reasonable assumed distribution of lateral forces, the capacity curve can be derived from the story shear-displacement curves. And by using equations suggested by ATC-40, the corresponding capacity spectrum, period, damping ratio and PGA can also be obtained. This method can provide not only collapse PGA of a low-rise RC building structure, but also damage conditions of members at a specific PGA. Combining with the deterioration rule for RC column after multiple earthquakes, it can also be applied to seismic analysis for after-earthquake or aged buildings.

最后则提出一套适用於中低层RC建筑结构之实用耐震诊断法，依照合理假设之地震力竖向分配型态及ATC-40建议公式，可再将层剪力-层间变位曲线换算为基底剪力-屋顶位移能力曲线，并计算对应之等效周期、阻尼比与PGA，除可评估结构整体之崩塌地表加速度外，也可由特定PGA反推对应的构件破坏程度，亦可配合震后折损修正，应用於结构之震后与经年耐震评估。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。