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基于BASYS3的新型四轴飞行器通讯及控制装置 被引量:1
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作者 朱志鸿 郑姚生 《电子器件》 CAS 北大核心 2017年第3期692-696,共5页
商业化四轴飞行器上的遥控器功能单一,没有DIY的能力,无法自行编写代码,不利于飞控新功能的开发。自制遥控器利用BASYS3作为主控芯片,采用433模块进行无线通讯,与飞控板进行有效信息交互;实现了除商用摇杆控制功能以外,还具备语音控制... 商业化四轴飞行器上的遥控器功能单一,没有DIY的能力,无法自行编写代码,不利于飞控新功能的开发。自制遥控器利用BASYS3作为主控芯片,采用433模块进行无线通讯,与飞控板进行有效信息交互;实现了除商用摇杆控制功能以外,还具备语音控制四轴飞行器的功能。与此同时,遥控器还可以实现同时与定高、定点、航拍等相结合的功能,实现四轴飞行器的全面稳定控制,为四轴飞行器后期的开发利用提供了进一步的参考。 展开更多
关键词 电子与通信技术 自制遥控 basys3 语音 多种功能结合 稳定控制
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白光LED用BaSi_2O_5∶Eu^(3+)红色荧光粉的制备及其性能研究 被引量:1
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作者 张慧娟 赵彦贵 +2 位作者 薛新巧 张长东 金明才 《化工新型材料》 CAS CSCD 北大核心 2017年第9期215-217,共3页
通过高温固相合成工艺制备出白光LED用BaSi_2O_5∶Eu^(3+)红色荧光粉,通过X射线衍射、荧光光谱、紫外-可见光光谱仪对材料的晶格结构、发光特性和白光LED灯珠的光谱特性进行了测试。研究结果表明,Eu^(3+)的掺入没有改变基质的晶格结构,... 通过高温固相合成工艺制备出白光LED用BaSi_2O_5∶Eu^(3+)红色荧光粉,通过X射线衍射、荧光光谱、紫外-可见光光谱仪对材料的晶格结构、发光特性和白光LED灯珠的光谱特性进行了测试。研究结果表明,Eu^(3+)的掺入没有改变基质的晶格结构,在Eu^(3+)掺杂浓度为5.0%(mol,摩尔分数)时,荧光粉的发射强度最高,最强激发峰为395nm,最强发射峰为614nm,通过结合紫光芯片和蓝黄荧光粉制备的白光LED灯珠,相关色温为4789K,显色指数为92,因此,BaSi2O5∶Eu^(3+)红色荧光粉是一种适合于紫光芯片应用的材料。 展开更多
关键词 BaSi2O5∶Eu3+ 高温固相法 红色荧光粉 紫光芯片
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The G^3 spline basis functions
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作者 Diao Luhong Cao Huan +1 位作者 Zhang Zhenmeng Lu Xiaoyan 《Computer Aided Drafting,Design and Manufacturing》 2016年第1期41-46,共6页
The explicit expression of the G3 basis function is presented in this paper. It is derived by constructing the conversion matrix between G3 basis function and Brzier representation. After the matrix decomposition, equ... The explicit expression of the G3 basis function is presented in this paper. It is derived by constructing the conversion matrix between G3 basis function and Brzier representation. After the matrix decomposition, equations for constructing G3 splines can be presented independently of geometric shape parameters' values. It makes the equation's solving easier. It is also known that the general form of the G3spline basis function is given in the first time. Its geometric construction method is presented. 展开更多
关键词 geometric continuity G3 spline basis functions splines B6zier representation matrix decomposition
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Effects of an odd particle on shape phase transitions in odd-even systems 被引量:1
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作者 Chang Xiu Yu Zhang +2 位作者 Ming-Jin Li Jie Yang Yan-Xia Chen 《Chinese Physics C》 SCIE CAS CSCD 2021年第8期110-118,共9页
A scheme to solve the Hamiltonian in the interacting boson-fermion model in terms of the SU(3)coupling basis is introduced,through which the effects of an odd particle on shape phase transitions(SPTs)in odd-A nuclei a... A scheme to solve the Hamiltonian in the interacting boson-fermion model in terms of the SU(3)coupling basis is introduced,through which the effects of an odd particle on shape phase transitions(SPTs)in odd-A nuclei are examined by comparing the critical behaviors of some selected quantities in odd-even and even-even systems.The results indicate that the spherical to prolate(U(5)-SU(3))SPT and spherical to γ-soft (U(5)-O(6))SPT may clearly occur in the odd-even system with the SPT signatures revealed by various quantities including the excitation energies,energy ratio,B(E2)ratio,quadrupole moments,and one-particle-transfer spectroscopic intensities.In particular,the results indicate that the spherical to prolate SPT in the odd-even system can even be strengthened by the effects of the odd particle with the large fluctuations of the quadrupole deformations appearing near the critical point. 展开更多
关键词 interacting boson-fermion model SU(3)basis shape phase transition effects of the odd particle
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