China has witnessed
many exciting changes after the Chinese government adopted reform and opening-up
policy in 1978. In this process, the United States has a positive influence on
China’s economic growth. Traditional view thinks that the influence of exports
on China's GDP growth is greater than imports, but the result of regression
analysis shows that imports have a greater impact on China’s GDP growth rather
than the exports. Based on the statistics from 1998-2007, China’s GDP will increase
by 0.455% if the volume of China’s exports to US increases by 1% while China’s
GDP will increase by 0.825% if the volume of China’s imports from US increases by
1%.

Abstract:
The Sino-US relations can be regarded as one of the most important bilateral relations in the world, and the Taiwan issue is the core of the relations. The main purpose of this paper is to analyze the impacts of the Taiwan issue on the Sino-US relations. These impacts are analyzed in the following four aspects: 1) the attitude of the US to the Taiwan independence forces; 2) the adjustment of global strategic objectives of the US; 3) the rise of China and the adjustment of the US’s China strategy; 4) the factors of Taiwan issue influencing on pattern of common interests of China and the US.

Abstract:
With the development of new energy technology, there are increasing applications of grid-connected photovoltaic power generation system. However, there is little research on development of electromechanical model of large scale photovoltaic power station. The computational speed will be very slow if electromagnetic transient model is used for stability study because of its complexity. Therefore, study on electromechanical transient model of grid-connected photovoltaic power generation system is of great meaning. In this paper, electromagnetic transient model of photovoltaic power generation system is introduced first, and then a general electromechanical transient model is proposed. These two kinds of simulation model are set up in PSCAD. By comparing the simulation results of two models, the correctness and validity of the electromechanical transient model is verified. It provides reference model for efficient simulation and modeling of grid-connected photovoltaic power station in large-scale power systems.

Gasification unit is one of the key subsystems in the
IGCC power system; the operating parameters of gasifier directly affect syngas
quality and performance of whole IGCC system. The system model of gasification
unit with coal water slurry gasifier was simulated and calculated using
THERMOFLEX software, and the relations of oxygen coal ratio (R_{oc}), water coal ratio (R_{sc}), gasification pressure,
gasification temperature and cold gas efficiency were mostly researched. The
results show that R_{oc} and R_{sc} have effect of mutual
restriction on gasification temperature, cold gas efficiency and syngas
composition. Gasification pressure mainly determines the capacity of the
gasifier, little effects on syngas composition.

Abstract:
Tangent bifurcation is a special bifurcation in nonlinear dynamic systems. The investigation of the mechanism of the tangent bifurcation in current mode controlled boost converters operating in continuous conduction mode (CCM) is performed. The one-dimensional discrete iterative map of the boost converter is derived. Based on the tangent bifurcation theorem, the conditions of producing the tangent bifurcation in CCM boost converters are deduced mathematically. The mechanism of the tangent bifurcation in CCM boost is exposed from the viewpoint of nonlinear dynamic systems. The tangent bifurcation in the boost converter is verified by numerical simulations such as discrete iterative maps, bifurcation map and Lyapunov exponent. The simulation results are in agreement with the theoretical analysis, thus validating the correctness of the theory.

Abstract:
Different glycoforms of some proteins have been identified as differential spots for certain diseases in 2-DE, indicating disease-related glycosylation changes. It is routine to determine the site-specific glycosylation of nonsialylated N-glycoproteins from a single gel spot, but some obstacles still exist in analyzing sialylated glycoproteins due to the lability and higher detection limit of acid glycans in MALDI-TOF/TOF analysis. Thus, we present an improved protocol here. Tryptic glycopeptides were separated and subjected to MALDI-TOF/TOF analysis, resulting in the identification of site-specific glycosylation of high-intensity glycopeptides. Sequential deglycosylation and desialylation were used to improve the identification of glycosylation sites and desialylated glycans. The site-specific glycosylation of large glycopeptides and low-intensity glycopeptides was deduced based on the masses of glycopeptides, deglycosylated peptides and desialylated glycans. By applying it to 2-DE separated human serum, the difference of N-glycosylation was successfully determined for α1-antitrypsin between different gel spots.

Abstract:
In the title compound, [Zn(C7H7N2O4)2(H2O)2]·2C3H7NO, the ZnII ion, which lies on a center of inversion, is coordinated by two O atoms and two N atoms from two 4-carboxy-2-ethyl-1H-imidazole-5-carboxylato anions and two water O atoms in an octahedral environment, Each 4-carboxy-2-ethyl-1H-imidazole-5-carboxylato ligand adopts a bidentate chelating mode to the ZnII ion, forming two five-membered metalla rings. In the crystal, a two-dimensional framework parallel to (010) is formed by N—H...O and O—H...O hydrogen bonds.

Abstract:
In the title complex, [Pr2(C2O4)3(H2O)4]n, the two independent PrIII ions are both nine-coordinated in a distorted monocapped square-antiprismatic geometry by seven O atoms from four oxalate ligands and two water molecules. The PrIII ions are bridged by the oxalate ligands, forming a layer parallel to (001). O—H...O hydrogen bonds connect the layers.

Abstract:
An amino acid sequence of a protein may be decomposed into consecutive overlapping strings of length K. How unique is the converse, i.e., reconstruction of amino acid sequences using the set of K-strings obtained in the decomposition? This problem may be transformed into the problem of counting the number of Eulerian loops in an Euler graph, though the well-known formula must be modified. By exhaustive enumeration and by using the modified formula we show that the reconstruction is unique at K equal or greater than 5 for an overwhelming majority of the proteins in the PDB.seq database. The corresponding Euler graphs provide a means to study the structure of repeated segments in protein sequences.

Abstract:
By finding local minima of an enthalpy-like energy, we can generate jammed packings of frictionless spheres under constant shear stress $\sigma$ and obtain the yield stress $\sigma_y$ by sampling the potential energy landscape. For three-dimensional systems with harmonic repulsion, $\sigma_y$ satisfies the finite size scaling with the limiting scaling relation $\sigma_y\sim\phi - \phi_{_{c,\infty}}$, where $\phi_{_{c,\infty}}$ is the critical volume fraction of the jamming transition at $\sigma=0$ in the thermodynamic limit. The width or uncertainty of the yield stress decreases with decreasing $\phi$ and decays to zero in the thermodynamic limit. The finite size scaling implies a length $\xi\sim (\phi-\phi_{_{c,\infty}})^{-\nu}$ with $\nu=0.81\pm 0.05$, which turns out to be a robust and universal length scale exhibited as well in the finite size scaling of multiple quantities measured without shear and independent of particle interaction. Moreover, comparison between our new approach and quasi-static shear reveals that quasi-static shear tends to explore low-energy states.