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Harbin is a major city in the north of China,the evolution of spatial morphology is effected by special geographical environment and rich history. Its urban pattern has common features as other waterfront cities in north of China, and also has own uniqueness. The paper starts from the analysis of evolution of spatial morphology,divides the history of Harbin into 3 stages,analyses the evolution and cause of each stage,and proposes the development direction of Harbin to provide reference for the waterfront cities in north of China.

Jilin is a major city in northern China, and the Special geographical environment and rich history and culture made a profound impact on the evolution of urban form. The urban pattern has common features as other waterfront cities in northern China, and also has its own uniqueness. With the start of analysis of evolution of urban form,this paper divides the development of Jilin City into three phases according time node,and analyzes the form evolution and its causes of each phase,as well as the relationship of the three phases. Finally,the paper presents development direction of spatial pattern of Jilin city based on analysis,and provides reference for the development for cold water cities.

Biofiltration of DCM vapor from air stream was discussed in this study. Experimental investigations were conducted on a laboratory scale biofilter, containing mixture of compost and polystyrene inert particles as the filter materials. Activated sludge was used as an inoculum. The continuous performance of biofilter for DCM removal was monitored for different concentrations and flow rates. The removal efficiencies decreased at higher concentrations and higher gas flow rates. A maximum elimination capacity of 8g/(m3·h) was achieved. The response of biofilter to upset loading operation showed that the biofilm in the biofilters was quite stable and quickly adapted to adverse operational conditions.

Accurate and effective seismic wavelet estimation has an extreme significance in the seismic data processing of high resolution, high signal-to-noise ratio and high fidelity. The emerging non-liner optimization methods enhance the applied potential for the statistical method of seismic wavelet extraction. Because non-liner optimization algorithms in the seismic wavelet estimation have the defects of low computational efficiency and low precision, Chaos-Genetic Algorithm (CGA) based on the cat mapping is proposed which is applied in the multi-dimensional and multi-modal non-linear optimization. The performance of CGA is firstly verified by four test functions, and then applied to the seismic wavelet estimation. Theoretical analysis and numerical simulation demonstrate that CGA has better convergence speed and convergence performance.

Crosstalk between high speed parallel bus signals is one of the most important signal integrity(SI) issues. In this article, a crosstalk simulation method based on full-wave scattering parameters extraction for transmission lines is researched. First, the coupling mechanism between transmission lines is analyzed using S-Parameter network theory and a fast frequency-domain method for crosstalk calculation is introduced. Then based on this method, some basic rules of crosstalk are studied in details and the method is validated by simulation results which agree well with those of RLGC model. At the end of this paper, a practical crosstalk simulation example between high speed data bus signals on a 8-layered printed circuit board is demonstrated step by step.

A scalable Graphics User Interface Architecture for open Computer Numerical Control (GUIAC) application is presented in this paper. The GUIAC is based on Windows Presentation Foundation (WPF) and Model-View-ViewModel (MVVM) design pattern. The WPF and MVVM pattern are used to decouple the User Interface (UI) presentation and business logic. This method makes the CNC application UI presentation design and the CNC application logic implementation work in parallel for improving the development and maintenance efficiency. Using the extensible application markup language can reduce the UI presentation design workload. The GUIAC has a loosely coupled structure with three layers. The experiment results of developing the CNC application using GUIAC show that the application graphics user interface is scalable and maintained easily.