Finally , the thesis introduces vanke real estate company for the demonstration research object , pointing out that the vanke ' s advantage of competition is the reasonable capital structure . to meet the future development , the thesis suggest that vanke ' s optimal capital structure decision be the debt increase moderation , bring into financing leverage , multi channel financing , furthermore , to increase the facility of the financing , it should be on the base of the stability of the capital structure 最后,文章以万科房地产公司为实证研究对象,以资本结构的相关理论为基础,指出万科经济合理的资本结构是万科在激烈的市场竞争中的优势,并从发展的角度,提出了万科最佳资本结构的建设性决策意见:适度增加负债融资,发挥财务杠杆作用;采取多渠道融资方式,在保持资本结构相对稳定的基础上增加应变的灵活性。
The framework of the instument is analyzed firstly , and the paper focuses on the ecg pre - amplifier design , the data acquisition module based - on isa bus with multi channel inputs is realized , the system software that can fulfill the data acquisition , display and communication is also designed . the two patterns of the network communication is introduced in detail 本文首先分析了智能网络型心电图系统的结构,重点叙述了前置隔离型心电图放大器的设计,研制了具有定时采样功能的多信道数据采集系统,编制了集采样、实时波形显示、测量及网络通信等功能于一体的系统软件。其中对心电图仪网络通信部分的两种模式作了详细介绍。
The major job is manufactured a transmitter , which has three upmixer channels . its function is to up convert the signals from c - band to ka - band . the input local oscillator is provided by a low frequency crystal oscillator which has a good performance of phase noise , through 512 times multiply to ka band . this sysetem is used in the laboratory as transmitter source of the fuze , for the multidimensional objects in practise , which lead to the complexity of the reflect signal , so the amplitude , frequency and the phase of the transmit signals both have a key role in dealing with the reflection signals . therefore , this system requires for both the coherence of the single channel ’ s amplitude , phase and multi channels 本文的主要工作是应用户要求制作一具有三发射通道的上变频系统,可以将c波段的微波信号上变频到ka波段的毫米波信号。系统的本振输入基频由一相位噪声非常好的低频率晶振提供,经过512次的倍频放大至ka波段。本系统作为实验室中引信的发射源,由于目标反射信号具有时变的多维性,反射信号变得极为复杂,在信号处理时,不仅信号幅值、频率有决定意义而且相位关系也很有决定意义。