摘要：Non-contact actuated microbeads have attracted a lot of attention in recent years because of its enormous potential in medical, biological, and industrial applications. Researchers have proposed a multitude of electromagnetic actuation(EMA) systems consisting of a variety of coil pairs. However, a unified method to design and optimize a coil pair according to technical specifications still does not exist. Initially, this paper presented the modeling of an untethered ferromagnetic particle actuated by externally applied magnetic field. Based on the models, a simple method of designing and optimizing the EMA coil pair according to technical specifications, was proposed. A loop-shaped coil pair generating uniform magnetic and gradient fields was chosen to demonstrate this method clearly and practically. The results of the optimization showed that the best distance to radius ratio of a loop-shaped coil pair is 1.02 for a uniform magnetic field and 1.75 for a uniform gradient field. The applicability of the method to other shapes of coil configuration was also illustrated. The best width to distance ratio for a square-shaped coil pair is 0.558 and 0.958 for uniform magnetic and gradient fields, respectively. The best height to width ratio and distance to width ratio for a rectangle-shaped coil pair is h/w =[0.9,1.1], d/w =[0.5,0.6] for uniform magnetic field and h/w =[1.0,1.2], d/w =[0.9,1.1] for uniform gradient field. Furthermore, simulations of a microparticle tracking the targeted trajectory were conducted to analyze the performance of the newly designed coils. The simulations suggested the ability of manipulating microparticles via the coils designed by our proposed method. The research mainly proposed a unified design and optimization method for a coil pair, which can support researchers while designing a specific coil pair according to the technical requirements. This study is aimed at researchers who are interested in EMA system and microrobots.

摘要：With the excellent biocompatibility and osteo- conductivity, nano-hydroxyapatite （nHA） has shown significant prospect in the biomedical applications. Con- trolling the size, crystallinity and surface properties of nHA crystals is a critical challenge in the design of HA based biomaterials. With the graft copolymer of chitosan and poly（N-isopropylacrylamide） in coil and globule states as a template respectively, a novel composite from chitosan-g-poly（N-isopropylacrylamide） and nano-hydro- xyapatite （CS-g-PNIPAM/nHA） was prepared via co- precipitation. Zeta potential analysis, thermogravimetric analysis and X-ray diffraction were used to identify the formation mechanism of the CS-g-PNIPAM/nHA compo- site and its morphology was observed by transmission electron microscopy. The results suggested that the physical aggregation states of the template polymer could induce or control the size, crystallinity and morphology of HA crystals in the CS-g-PNIPAM/nHA composite. The CS-g-PNIPAM/nHA composite was then introduced to chitosan-gelatin （CS-Gel） polyelectronic complex and the cytocompatibility of the resulting CS- Gel/composite hybrid film was evaluated. This hybrid film was proved to be favorable for the proliferation of MC 3T3-E1 cells. Therefore, the CS-g-PNIPAM/nHA compo- site is a potential biomaterial in bone tissue engineering.

摘要：　根据以氮气为载气的特殊要求,对kW级氧碘化学激光器(coil)装置的结构进行了有针对性的设计和实验研究。在氯气流量为140mmol/s的情况下,获得了2.6kW的功率,相应的化学效率为20.4%,喷管出口能流密度达到了74W/cm2。这一结果达到了以氦气为载气coil的水平。

摘要：通过求解层流Navier-Stokes方程和组分输运方程,数值模拟了化学氧碘激光(coil)三维扩压器和光腔中10组分21反应的内流流场,计算中没有考虑水蒸气在低温下的冷凝以及激光能量的输出。通过与国外文献计算结果比较可知,物性系数、化学反应速率常数、边界条件处理等对组分浓度影响较大,缺乏这些数据库将会影响计算结果。计算表明,三维副流射流基本穿透主流到达中心线,主副流混合较强,激发态粒子高浓度区主要在中心线附近,因此,也只有在中心线附近有较强的小信号增益系数,进一步研究混合增强技术可以提高原材料的使用效率以及激光的出光功率。本研究可为强激光武器系统之新型压力恢复系统的设计提供技术储备。

摘要：设计并研究了适合于连续波超音速化学氧碘激光器的正支共焦非稳腔，给出了放大率、输出功率和光束质量的实验结果。

摘要：利用快速傅里叶变换 ( FFT)法对有正支共焦非稳腔、流动增益介质的化学氧碘激光器 ( coil )与二氧化碳激光器的模场进行了数值模拟 ,在此基础上分析了介质的非均匀增益对激光模式的影响 ,为新的腔型设计和光束质量的改善提供了依据 .

摘要：氧碘化学激光 (简称 coil )系统中 ,水是影响激光功率输出的最重要的原因之一。气流中的水不仅对激发态碘原子有严重的猝灭作用 ,另外对碘分子解离、超音速流动特性也有很坏的负面作用。单重态氧发生器的 BHP(Basic Hydrogen Per-oxide )溶液是最主要的水蒸汽源。利用传质模型对射流式单重态氧发生器 (简称 JSOG)中产生的水蒸汽进行了计算 ,所得的数值结果与实验测量结果基本相符。根据模拟结果 ,对发生器的设计及实验条件进行了优化。

摘要：Non-intrusive measurement technology is of great interest for the electrical utilities in order to avoid an interruption in the normal operation of the supply network during diagnostics measurements and inspections. Inductively coupled electromagnetic sensing provides a possibility of non-intrusive measurements for online condition monitoring of the electrical components in a Medium Voltage (MV) distribution network. This is accomplished by employing Partial Discharge (PD) activity monitoring, one of the successful methods to assess the working condition of MV components but often requires specialized equipment for carrying out the measurements. In this paper, Rogowski coil sensor is presented as a robust solution for non-intrusive measurements of PD signals. A high frequency prototype of Rogowski coil is designed in the laboratory. Step-by-step approach of constructing the sensor system is presented and performance of its components (coil head, damping component, integrator and data acquisition system) is evaluated using practical and simulated environments. Alternative Transient Program-Electromagnetic Transient Program (ATP-EMTP) is used to analyze the designed model of the Rogowski coil. Real and simulated models of the coil are used to investigate the behavior of Rogowski coil sensor at its different stages of development from a transducer coil to a complete measuring device. Both models are compared to evaluate their accuracy for PD applications. Due to simple design, flexible hardware, and low cost of Rogowski coil, it can be considered as an efficient current measuring device for integrated monitoring applications where a large number of sensors are required to develop an automated online condition monitoring system for a distribution network.

摘要：Superconducting magnet system for a 28GHz ECR ion source has been *** maximum axial magnetic fields are 4T at the rf injection side and 2T at the beam extraction side,*** hexapole magnetic field is about 2T on the inner surface of the plasma *** superconducting coils consist of six solenoids and six racetrack windings for a hexapole *** kinds of coil arrangements were investigated:one is an arrangement in which the hexpole coil is located in the bore of the solenoids,and another is the reverse of *** coils use NbTi-Copper conductor and are bath-cooled in liquid *** six solenoids are excited with individual power supplies to search for the optimal axial field *** current leads use high Tc material and the cryogenic system is operated in LHe re-condensation mode using small *** thermal insulated supports of the cold mass have also been designed based on the calculated results of the magnetic *** heat loads to 70K and LHe stages were estimated from the design of the supports,the current leads and so on.

摘要：对优化设计的射流式单重态氧发生器（ＪＳ－１）进行了一维模型计算，理论上确定了经优化设计的ＪＳ－１的最佳氯气摩尔流量，并进行了实验研究，对某些工作参数作了实验考查，进而从实验中确定了氯气摩尔流量的最佳值，实验结果与模型计算结果相一致。同时实验考察了载气对射流式单重态氧发生器（ＪＳＯＧ）工作性能的影响。