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Research has been done on the coupling form between the two-row planetary gear train and the shift restriction based on the matrix, and then the method of establishing mathematics model has been presented to analyze the planetary gear transmission using MATLAB. The coupling-matrix, restriction-matrix and transmission matrix form the model. All coupling-matrices corresponding two kinds of the coupling form determine the planetary gear transmission model.

基于矩阵理论对双排行星齿轮变速机构的行星排之间联结、换挡约束进行研究，提出用联结矩阵、约束矩阵和传动矩阵构建数学模型并使用MATLAB进行传动分析的方法。2种方式的联结形式所对应的联结矩阵可以确定机构所有可能的结构型式，据此得到双排行星齿轮变速机构全部型式谱图。

Study engineering drawings and blueprints, determine the materials required, and plan the sequence of tasks to cut metal most efficiently · Construct patterns and templates as guides for layouts · Lay out reference points and patterns on heavy metal according to component specifications · Rig, hoist and move materials to storage areas or within worksite · Assemble and fit metal sections and plates to form complete units or subunits using tack welding, bolting, riveting or other methods · Set up and operate various heavy-duty metal-working machines such as brake presses, shears, cutting torches, grinders and drills, including computer numerical control equipment, to bend, cut, form, punch, drill or otherwise form heavy-metal components · Install fabricated components in final product.

研究机械制图和图纸，决定所需材料，并计划工作顺序，有效地切割金属。 2。构建模式和模板作为布局向导 3。按照组件规格在重金属上设计参考点和模型 4。装备、起重机和运输材料入库或在工地场内 5。组装和安装金属部件和板材形成全套装置，或通过点焊、螺栓连接，铆接法或其他方法形成次单元。 6。建立并操作各种重金属加工机床，例如压弯机、剪床、割炬、磨钻机，包括数控设备，压弯、切割、成型、打洞、钻孔，或相反形成重金属组件。 7。在成品上安装已制造好的组件 Structural metal and platework fabricators and fitters 结构金属和板金加工制造工和安装工

Form board pole setting Fang Mu by the fact that superheavy basement roof form board props up system's to in the project bears the weight of the checking calculation being in progress strenuously , the form board construction scheme satisfies call for in reaching this project.

表板极设置方牧的是，超重地下室屋顶形式局道具系统的项目中承担的重量验算正在进展中发奋的形式局施工方案符合要求达成这一项目。

Form board pole setting Fang Mu by the fact that superheavy basement roof form board props up system's to in the project bears the weight of the checking calculation being in progress strenuously , the form board construction scheme satisfies call for in reaching this project.

模板杆由事实的设置犬齿Mu超重元素地下室屋顶模板扶植系统的对在项目吃力地负担检查的演算的重量过程中，模板计划满足呼叫请求在到达这个项目的建筑。

According to the geometric evolution of the substitutedcumulenes from the cumulenic-like resonance form to the acetylenic-like (charge-separated) resonance form, it is obtained that there are two kinds ofresonance form of the substituted cumulene.

根据取代累接双键烃几何构型从累接双键烃共振结构逐渐演变到多炔共振结构的过程，给出了取代累接双键烃的两种共振形式。

According to the geometric evolution of the substituted polyynes from theacetylenic-like resonance form to the cumulenic-like (charge-separated)resonance form, it is obtained that there are two kinds of resonance form of thesubstituted polyyne.

根据取代多炔几何构型从多炔烃共振结构逐渐演变到累接双键烃共振结构的过程，表明取代多炔存在着两种共振形式。

Fatty acid compositon is the primary acid component that can react with metal ions in DCS to form sticky insoluble soap; while resin acid does not form soap with metal ions at lower temperature and does form insoluble soap with less sticky at higher temperature. pH value is the key factor influencing the deposit of pitch with the presence of DCS in DIP, there is little deposit at lower pH however the deposit increases obviously with the increase of pH.

脂肪酸是与脱墨浆 DCS 中金属离子形成黏性不溶性皂的主要酸性组分，树脂酸在低温时几乎不形成皂，高温时有不溶性皂产生但沉积性较低。pH值是影响树脂在脱墨浆 DCS 存在时沉积的关键因素，在低 pH值时胶体树脂沉积程度较低，而在中碱性 pH 值时，沉积量显著增加。

Some form symbiotic associations with algae or cyanobacteria to form lichens, while others form extremely important mycorrhizae with the roots of many plants, including most forest trees.

真菌是土壤和淡水中主要的分解者，一些与藻类或蓝细菌共生形成地衣，还有一些真菌与许多植物包括大多数林木的根形成大量的菌根。

The natural intimacy to the aesthetic form of romanticism and realism, the natural resistance to the aesthetic form of symbolism, makes up the aesthetic form of the literary motif of individualism in modern Chinese literature.

对浪漫主义与现实主义审美形式的天然亲近，对象征主义审美形式的天然拒斥，构成中国现代个性主义文学主题的一般美学表现形式。

The transient transfection efficiency was measured by flow cytometry. The stable transfected cells were screened by G418. Results Electrotransfection had the highest transient transfection efficiency (56.8%), with the most masc clones of stably transfection and the least time taken to form big masc clones (20 days). Cationic polymer mediated transient transfection had the lowest efficiency (1.7%), with the least masc clones and the longest time taken to form the big masc clones (30 days). Cationic liposome transfection had a transient transfection efficiency of 39.9% and took 25 days to form the big masc clones.

结果 电转染有最高的瞬时转染效率(56.8%)，稳定转染得到的阳性克隆最多，且从细胞筛选到扩增至得到阳性大克隆所用的时间也最少（约20d）；用阳离子聚合物瞬时转染率低(1.7%)，稳定筛选同样可以得到阳性大克隆，但是数量很少且从细胞筛选到扩增至阳性大克隆所用的时间也最多（约30d）；阳离子脂质体转染效果居中，瞬时转染率为39.9%，从细胞筛选到扩增至得到阳性大克隆所用的时间约25d。

Through comparing with the results by simulation to study the effects of theprojectile"s final velocity, the angle of rotation and the ballistic trajectory"s migration withdifferent projectile"s rotating speeds, different target"s moving speeds and differentpenetration angles.

通过比较数值模拟的结果来研究不同弹头转速、目标速度、侵彻角对侵彻过程中弹头最终速度、翻转角度和弹道偏移的影响。

I love stationery and all the accoutrement of writing.

我爱文具以及所有的书写的工具装备。