查询词典 positive definite form

In this paper, searching technology of product information based on knowledge was researched. On the aspect of cognition, we researched the relation between user\'s cognition and designer\'s cognition, explored the knowledge flow in the process of product development, set up a matching model between user\'s knowledge and designer\'s knowledge, brought forward a modeling method based on users\' cognition, and set up a measurable model of product feature; coded and decoded product form element, set up a computer aided product form design system and image evaluating system based on the result of measurement. Accordingly, the product style and product image were systematically discussed, the recognition space of product style and image was constructed, the factors that affect product style and image were put forwards and analyzed, and the relation between product image and form elements was tested by experiments. Furthermore, the product automatic recognition technologies were discussed.And then, with the media of concept model and the kernel of parameter technology, a mathematic model that describing product layout design by constraints and rules was presented. Furthermore, a product design integration system based on imagery thinking including product fonii base system based on imagery thinking, product form design system based on imagery thinking and product form intelligent design system based on space layout were set up, which tested the system and provided a new way for product innovative design.

本文以产品特征描述目标对象——产品，研究一种基于知识的产品信息检索技术，在对产品的认知方面，研究了用户认知和设计师认知之间的关系，研究了产品开发过程中的知识流传递过程，建立了用户知识和设计知识之间的匹配模型，提出了一种基于用户知识的产品建模方法，它不但提取了产品的特征，还建立了产品特征量化模型，从而实现了产品知识的量化描述；对产品造型元素进行分解和编码，利用实验量化结果构造计算机辅助产品形状设计系统和心象评价系统；使用量表分析造型元素的心象尺度，构造输入、输出系统，建立了产品设计知识库咨询系统，可以方便用户和设计师来导入或查询产品设计方案；实现了对产品造型心象的分类知识库系统，便于设计师存储或查询，辅助设计师进行产品创新设计；通过实验量化了产品造型参数和产品心象参数之间的关系，并在此基础上建立了基于心象的产品形状设计系统，为产品空间布局方案智能生成系统奠定基础；在基于知识库的基础上建立了产品空间布局方案智能生成系统，通过更改概念产品造型参数，实现了产品设计方案的智能生成，使系列化的设计工作变得十分方便；将产品的心象运用到实际设计过程中，能够引导流行趋势，创造出产品无形的设计价值。

The part of a historical period is single, be born on stem tuber, petiole grows 8 ～ 25cm, constant purple or green have violet spot, in mid and the following give birth to one bead bud; Form of form of egg of shape of blade long circle, egg of long triangle shape or form of heart shape halberd, grow 20cm of 5 ～, wide 3 ～ 8cm; Tip is long gradually pointed or submit end form sometimes, base form of ministry deep heart, often be above sinuosity have 1 bead shoot, above green, often take below lilac, whole reason, side arteries and veins feather shape, combination is in in close brim.

叶单一，生于块茎上，叶柄长8～25cm，常紫色或绿色具紫斑，在中部以下生一珠芽；叶片长圆状卵形。长三角状卵形或心状戟形，长5 ～20cm，宽3～8cm；先端长渐尖或有时呈尾状，基部深心形，常在弯曲处上面有1珠芽，上面绿色，下面常带淡紫色，全缘，侧脉羽状，在近边缘处联合。

The form and transmutation of inhabitation form can be simulated as a code coding/decoding process. In this way, the study on the symbolism and vicissitude of inhabitaticn form constructs microcosmical viewpoint, and the discussion in macrocosmic placing the form and transmutation of inhabitation form into the background of culture vicissitude is also carried out.

居住形态的形成和嬗变可以看作为一个符码的编码/译码过程，这样，对居住形态象征意义及其变迁的研究构成了一个微观维度的视角；同时，本文亦将居住形态的形成与嬗变置入文化变迁的大背景中，从宏观维度加以讨论。

Umbrella form inflorescence normally 2~4 bunch gives birth to short branch of Yu Xie armpit, short branch grows 1~2 millimeter; Inflorescence total stalk grows 5~10 millimeter, by short fluff; Bud piece 4, wide egg form, have 5~6 arteries and veins, outside a few without wool, inside face by white short fluff; Inflorescence of each umbrella form has beautiful 4~6, the leaf is opened or open at the same time with the leaf first; Peduncular grow about 1.5 millimeter, close by white fluff; Perianth piece 6, elliptic, two sides by short fluff; In male flower can Yo is staminal 9, filament has grey yellow fluff, form of heart of shape of aegis of body of gland of ministry of the 3rd round of stamen radical, do not have a handle nearly, degrade pistil is not had; Stamen degrades in female flower 9, staff state, by grey yellow fluff, ovarian crock form, style is dumpy, post head shape, shallow crack.

伞形花序通常2~4个簇生于叶腋短枝上，短枝长1~2毫米；花序总梗长5~10毫米，被短柔毛；苞片4，宽卵形，有5~6条脉，外面几无毛，内面被白色短柔毛；每一伞形花序有花4~6朵，先叶开放或与叶同时开放；花梗长约1.5毫米，密被白色柔毛；花被片6，椭圆形，两面被短柔毛；雄花中能育雄蕊9，花丝有灰黄色柔毛，第三轮雄蕊基部腺体盾状心形，近无柄，退化雌蕊无；雌花中退化雄蕊9，棍棒状，被灰黄色柔毛，子房壶形，花柱粗短，柱头头状，具浅裂。

The concentrations of soil HAC-soluble form was slightly higher when the soil was combined with raw manure compared to with manure compost. The changing percentage of the Cu forms of the total Cu were, HAC-soluble form, reducible form and oxidisable form were increased, and residual form was decreased, and the two soil expressed the same trend.

堆肥猪粪处理的醋酸提取态铜含量显著高于原始猪粪处理；各形态Cu占总Cu百分比的变化情况为，醋酸提取态、可还原态和可氧化态增加，残渣态减少，菜园土和矿山土表现了相同的趋势。

LED stars light has five cape star polygon, bullet form, snowflake form, strawberry a form, diamond form, pine tree form etc.

LED 星星灯配装功能控制器，可以感觉到无比非凡的魅力，让其体现真星闪烁的生动效果。

4Some job stressors can predict job burnout, stresses form ecomocial-socail treatment, workload and school management entered emotional exhaustion regression equation, stresses form student factors entered depersonalization regression equation, stresses from workload and examination entered reduced personal accomplishment regression equation. It is clearly that stresses from ecomocial-socail treatment and school management have positive influence to turnover intention; also emotional exhaustion and reduced personal accomplishment have positive influence to turnover intention.

部分压力源对职业倦怠的三个维度有预测作用，来自经济社会待遇、工作负荷、学校管理的压力进入情感衰竭的回归方程，学生因素进入去个性化的回归方程，学校管理的压力和考试压力进入个人成就感降低的回归方程；学校管理、经济社会待遇的压力对离职倾向有显著的预测作用；情感衰竭和成就感降低对离职倾向有显著的预测作用。

So there is no definite boundary between Capital Form and Social democracy Form.

因此社会主义资本主义就是人类发生的最高阶段。

According to the studied results at present, the studied objects are mainly thin plate and beam about sound radiation mode, a method computed sound radiation mode of complex structure is presented in this dissertation, according to the results of the previous two chapter, a theoretical method to solve acoustical radiation mode and acoustical radiation efficiency of complex structure by boundary element method and acoustical radiation theory is posed, the acoustical radiation power is expressed as a Hermitian quadratic form, while the radiation modes is determined by general eigenvalue decomposing, and then the radiation efficiency is computed via the orthodoxy of radiation modes with regard to impedance matrix and average velocity matrix; lastly, the validity of the method is proved by pulsating sphere and radiating cube with analytical results. According to results of the form three chapter, the structure sound radiation sensitivity is studied in detail, the sound radiation power of structure can be expressed as positive Hermitian quadratic form, the sound radiation sensitivity can be expressed as two parts by partial differential with respect to design variable, which are sensitivity of boundary velocity and impedance matrix, combined with the theory of FEM and BEM, the structure sound radiation can be translated to the analysis of structure dynamic sensitivity and impedance matrix sensitivity. The theory posted in this dissertation is tested by the FEM software ANSYS and the software AAS programmed by author.

在前几章的基础上，通过结构声辐射的模态理论对结构的声辐射的机理进行了深入地探讨，针对目前声辐射模态的研究对象主要是简单的板和梁类结构，提出了一种计算复杂结构声辐射模态的方法，利用前两章研究所得的结论，将边界元方法与广义特征值的理论结合起来研究了复杂结构的声辐射模态与声辐射效率，先将结构的声辐射功率表示为一个正定的厄米特二(来源：ABb7C论文0909网www.abclunwen.com)次型，运用广义特征值分解求解了复杂结构的声辐射模态，然后利用声辐射模态关于阻抗矩阵与均方速度耦合矩阵的正交性，求解了复杂结构的声辐射效率，最后用具有解析解的脉动球与辐射立方体验证了该方法的有效性。

With the dose of 7.04 mC/cm2, ODT/Au will become a more strengthened structure and then form a negative resist in the correlation with cross-linking from alkyl matrix, partial breakdown of S-Au bonding and surface adsorption by air-borne species. Thus, it can obtain a gold pattern via gold-etching process. Besides, as a result of massive breakdown of alkyl matrix and S-Au bonding from ODT/Au under irradiation with doses of 64.06 and 128.13 mC/cm2, ODT SAMs would form a loose-packed structure on the gold substrate. The ODT/Au becomes less resistive for gold-etching and a positive gold pattern would form after gold-etching.

结果发现：以50 eV 低能量电子在照射剂量7.04 mC/cm2微影并曝露於大气后，受到来自於ODT/Au碳链间的交联、部分的S-Au键结破坏以及照射后立即曝露大气所吸附於表面的碳氧化物种的共同影响下，ODT SAMa於Au膜基材上将形成更紧密复杂的结构而作为负型阻剂，经后续湿式蚀刻15分钟后将显影出来Au的负型图案；当提升照射剂量至64.06及128.13 mC/cm2后，由於ODT/Au上碳链及S-Au键结的大量破坏，将使ODT/Au结构不能稳固且紧密地排列於Au膜基材上，显影时Au蚀刻液将容易穿过ODT SAMs抵达S/Au界面而移除Au，而形成正型图案。

The United Kingdom has pledged to provide technical assistance to the peacekeeping effort in Darfur, including airlifting supplies and equipment to assist the African peacekeepers.

英国承诺为达佛的維和努力提供技术帮助，包括提供非洲的維和部队空运补給和裝备。

Results: The level of ET-1mRNA in placental villus was significantly higher in pre-eclamptic women than that in control group.

结果：妊高征组患者胎盘绒毛组织ET-1 mRNA的表达较正常妊娠组明显增高。