双

In practice, the offset curve usually is approximated by lower degree rational polynomial cur ve in order to have the unified expression of data structure and geometric algor ithm in the commercial modeling systems.

通过用双圆弧逼近表示 NURBS( non- uniform rational B- spline)曲线及其 offset，并利用双圆弧逼近的特有性质，把 offset的双圆弧逼近转化为原曲线的双圆弧逼近，简化了问题的求解。

It is treated with six fields (Anterior, Posterior, four obliques) positioned 60° apart around the circumference of the patient, each dual field is made up of two component beams, pointing ±15° with respect to the horizontal. The nominal energy of electron beam produced by Mevatron Ⅻ is 3MeV, and the patient is treated at a distance of 3 meters. Using Capintec dosemeter and PS-033 electron beam chamber for measurement, one moniter unit of radiation is equivalent to 0.0127cGy. Measurement of electron energy by Kodak X-omat-V verification film inside the Rando phantom at 100 cm SSD was 3.70MeV, electron energy measured at 3 meters was 3.51MeV. X-ray contamination was measured as 9.5% per six dual fields.

此种方法分别使用六个双照野，由病人的前、后、左前、右前、左后、右后各间隔60度共六个方向照射，每一双照野由水平向上和向下15度照射；荣民总医院选择3MeV电子射束来治疗病人，治疗距离为3公尺，利用擬人假体及柯达X-omat-V验证片实验得电子射束初始能量从3.7Mev变为3.51MeV，六个双照野之X光污染共达9.5%，使用Capintec剂量表及PS-033型电子射束用游离腔测量六个双照野，每一监测单位相当於0.00127 cGy。

At the same time, the finite staff element method is used to analyze the influence of beam rigidity; and the two new methods proposed are used to analyze the influence of connect way between piles and beam; and the conclusion is obtained that the rigidity ratio between beam and piles being 0.48 is appropriate; the continuative increase of the rigidity ratio is not significant; the worst condition is that connecting way between piles and beam is hinged; the best condition is that connecting way between piles and beam is rigid. Whether is single-row pile or are double-row piles, when the front of single-row pile or the front of the front-row pile(in the double-row piles) needed excavation, it is supposed to that ought to be carefulness to excavate, because it is that the engineering cost increased greatly.

同时，用有限杆单元法，对双排桩的连梁刚度和用文中提出的方法以桩梁连接方式进行了试验和理论分析得出如下结论：在满足不相互影响排桩间距的情况下，桩顶连梁与桩的刚度比不小于0.48是合适的，此时再增加连梁刚度无意义；桩梁连接为铰结时双排桩受力变形性质最差，刚结时受力变形性质最好；不论是单排桩还是双排桩，桩前和前排桩桩前土体需要开挖时应慎重，因为这种开挖对支护结构影响很大，造价增加很多；双排桩省钱，而且抵抗变形的能力强，值得在工程中研究和广泛应用

Research on multi-objectives optimal operation of the hydropower station with two-row placed units is studied with an example of Lijiaxia hydropower station. Stability characteristics and operation efficiency of the two-row placed units is studied by real test and analysis. Optimal operation mode is also proposed.

以李家峡双排机水电站为实例，开展双排机水电站综合优化运行研究，通过真机测试分析，得出了李家峡双排机水电站机组稳定性特征和机组效率变化规律，提出了双排机水电站优化运行模式。

Main PPR, ABS, PEX Pipe Production Line, PVC, HDPE gas pipe production line, large-caliber hollow-wall winding pipe production line, silicon core pipe production line, steel-plastic composite, medical tube, nylon tube production line, PVC foam core pipe, with spiral pipe production line, posts and telecommunications perforated pipe production line, double-wall corrugated pipe, spiral pipe production line, peroxides, cross-linked polyethylene, pipe production lines, two-pipe extrusion production line, plastic board material production line, plastic foam picture frame-type material production line, SJYF plastic profile extrusion production lines, blow molding Blow Molding Machines, Single Screw eager, cold-cut granulator unit, with the parallel twin-screw extruder, SJSZ conical twin-screw plastic extruder, SJ single screw extruder, SRL-Z series mixing unit, SHR series high speed mixer, auxiliary products sold nationwide and exported to Southeast Asia more than 10 countries and regions.

主要有PPR、ABS、PEX管材生产线、PVC、HDPE燃气管生产线、大口径中空壁缠绕管生产线、硅芯管生产线、、钢塑复合、医用管、尼龙管生产线、PVC芯层发泡管、内螺旋管生产线、邮电通讯多孔管生产线、双壁波纹管、螺旋管生产线、过氧化物、交联聚乙烯、管材生产线、双管挤出生产线、塑料板材生产线、塑料发泡镜框型材生产线、SJYF塑料挤出异型材生产线、吹塑中空成型机、单螺杆热切、冷切造粒机组、同向平行双螺杆挤出机、SJSZ锥形双螺杆塑料挤出机、SJ单螺杆挤出机、SRL-Z系列混合机组、SHR系列高速混合机、辅机系列产品畅销全国并出口东南亚等十多个国家和地区。

Comparative evaluation of the pricing strategy which induced by the single-objective and double-objective route guidance ,then the pricing result was given under the induction of double-objective route guidance , Numerical result shows that the single-objective route guidance, compared to the double-objective route guidance, will enhance the feasible region of traffic information pricing when traffic information quality is bigger than 0.1, finally, the respective interests of the profits of information users, information providers and the traffic manager who as the decision-making host separately are considered, ultimate price of the traffic information was 1.3 yuan, 2.6 yuan and 1.8 yuan.

用已建的模型对比评价了单目标和双目标两种路径诱导下的交通信息定价策略，并给出双目标路径诱导下的交通信息定价结果，研究结果表明，与双目标路径诱导相比，当交通信息质量大于0.1时，单目标路径诱导增大了交通信息定价的可行区域；最后当具有信息的出行者、交通信息提供者、交通管理者三方各自的利益为决策主体时，双目标路径诱导下交通信息的最终价格分别为1.3元、2.6元和1.8元。

The multi-body steering system model of a dual-front-axle heavy trucks using ADAMS software was established, which contains body, steering wheel, recirculating ball steering gear, double-front axle, dual-rocking arms, suspension, king pin and the front wheels etc.

应用机械系统动力学自动分析软件ADAMS(Automatic Dynamic Analysis of Mechanical Systems)，针对某型号重型汽车双前桥系统为研究对象，建立包括车身、转向盘、循环球式转向器、双前桥、双摇臂、悬架、主销、转向轮等在内的双前桥系统多体模型。

When it is under certain perturbation, a quasi-elliptic response with transmission zeros to improve the transition can be obtained using the transmission zero technique given in the dissertation. Further, a multi-mode resonator composed of a half wavelength resonator loaded with two shunt series LC circuit is also investigated intensive.

本文提出了一种新型准集总元件谐振器，它既具有结构紧凑的优点，又能够引入传输零点构成准椭圆特性响应；本文也提出了一种由半波长传输线加入微扰构成的双模谐振器，并对它的传输零点技术做了全面系统的研究，这种双模谐振器相比传统的环形双模谐振器有更加紧凑的尺寸；本文提出了一种由半波长传输线加载并联串联LC电路构成的多模谐振器并对其在宽带滤波器的应用进行了研究；论文对一种复合谐振器及其在双通带滤波器设计中的应用进行了研究。

Based on the virtual prototype technology and simulative software platform Pro/E, the double rotating shaft supporting mechanism of wind tunnel testing model was designed and developed, and the mathematical model of angle control was established.

基于虚拟样机技术及仿真软件平台Pro/E，设计开发了风洞试验模型的双转轴支撑机构，建立了角度控制的数学模型，实现了机构的虚拟样机设计和运动学仿真，获取了被测试验模型运动情况的运动参数曲线，并对双转轴机构实施了干涉的动态检查，为双转轴机构设计方案的交流与评估，以及双转轴机构的制造与应用奠定了基础。

And variables such as college of management and law, man, self-boarding, rural area were associated with higher score of K-MDQ and sophomore and christian were associated with lower score of K-MDQ statistically.

目的 ：了解韩国版心境障碍问卷临床应用情况，通过心境障碍问卷对大学生双相 I 型、双相 II 型、双相障碍、 NOS 进行筛查，了解大学生人群双相障碍谱系疾病的发病率。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。