I work in the Dalian Development Zone. Although the central government did not invest a penny, the zone’s annual revenue is some 5 billion yuan. In 2003, it surpassed 6 billion yuan. There are many solely foreign-inv...I work in the Dalian Development Zone. Although the central government did not invest a penny, the zone’s annual revenue is some 5 billion yuan. In 2003, it surpassed 6 billion yuan. There are many solely foreign-invested enterprises in the development zone-more than 300 are Japanese, and there are many Sino-foreign joint ventures. The annual profits of 70 million yuan come mostly from these joint ventures.I think the development zone will play an important role in the revital-ization of industries in the Northeast.展开更多
With the aid of hydrogen permeating devices, the hydrogen permeation behaviors of X52 pipeline steel in NACE A solution with saturated H2S/CO2 were studied under the conditions of different ambient temperatures and pH...With the aid of hydrogen permeating devices, the hydrogen permeation behaviors of X52 pipeline steel in NACE A solution with saturated H2S/CO2 were studied under the conditions of different ambient temperatures and pH values, and the hydrogen permeation behaviors of X52 pipeline steel in weld seam zone were comparatively studied. The experimental results show that the hydrogen permeation coefficient value is directly proportional to the time required for reaching the saturation anode current and inversely proportional to the saturation anode current, and the hydrogen permeation coefficient is influenced by the corrosion scales; the temperature is directly proportional to the saturation anode current, and the hydrogen permeation coefficient is influenced by the temperature and corrosion scales, heat-affected zone and matrix zone in NACE A solution with saturated H2S/CO2 at normal temperature. The hydrogen permeation coefficient in weld seam zone is larger than that in heat-affected zone which is further larger than that in matrix zone.展开更多
CHINA is a great agricultural country,with a farming population that con-stitutes two-thirds of its nationaltotal. Since reform and opening tothe outside world, China’s agricultural produc-tion has developed rapidly....CHINA is a great agricultural country,with a farming population that con-stitutes two-thirds of its nationaltotal. Since reform and opening tothe outside world, China’s agricultural produc-tion has developed rapidly. The total agricultur-al production for 2000 was 3.3 times that展开更多
Circular double stranded DNA has different topological states which are defined by their linking numbers. Equilibrium distribution of linking numbers can be obtained by closing
While recent judicial interpretations released by the Supreme People’s Court, China’s top judicial organ, have addressed some ambiguities in the country’s two-year-old Property Law, they may give rise to new disput...While recent judicial interpretations released by the Supreme People’s Court, China’s top judicial organ, have addressed some ambiguities in the country’s two-year-old Property Law, they may give rise to new disputes, legal experts say.展开更多
Initially, Osgood used the integral ∫dr/f（r）for an unicity crite, rion to the differential equation y＇ = f（y）, f （0） = 0. The trivial solution is unique iff this integral goes to the infinite at the origin. Th...Initially, Osgood used the integral ∫dr/f（r）for an unicity crite, rion to the differential equation y＇ = f（y）, f （0） = 0. The trivial solution is unique iff this integral goes to the infinite at the origin. Then he can prove the unicity of the trivial solution of y＇ = y Ln｜Y｜, although the second member is not lipschitzian. Later, Bernfeld [1] shows that all the solutions of y＇ = f（y） do not explose iffthe same integral goes to the infinite at the infinite. Finally, we can adapt a result from the Cauchy works as follows： the trivial solution is a singular solution iffthe same integral vanishes at the origin. Using non standard analysis, we present the proofs of the different criterions and show that the Osgood integral was used by Cauchy before in the similar purpose.展开更多
The bounded and smooth solitary wave solutions of 10 nonlinear evolution equations with a positive fractional power term of dependent variable are successfully obtained by homogeneous balance principle and with the ai...The bounded and smooth solitary wave solutions of 10 nonlinear evolution equations with a positive fractional power term of dependent variable are successfully obtained by homogeneous balance principle and with the aid of sub-ODEs that admits a solution of sech-power or tanh-power type.In the special cases that the fractional power equals to 1 and 2,the solitary wave solutions of more than 10 important model equations arisen from mathematical physics are easily rediscovered.展开更多
文摘I work in the Dalian Development Zone. Although the central government did not invest a penny, the zone’s annual revenue is some 5 billion yuan. In 2003, it surpassed 6 billion yuan. There are many solely foreign-invested enterprises in the development zone-more than 300 are Japanese, and there are many Sino-foreign joint ventures. The annual profits of 70 million yuan come mostly from these joint ventures.I think the development zone will play an important role in the revital-ization of industries in the Northeast.
基金Funded by the Program for National Science Foundation for Distinguished Young Scholars (No.51125019)the National Natural Science Foundation of China (No.50904050)+2 种基金the Basic Projects of Sichuan Province of China(No.2011JY0106)Postdoctoral Science Foundation(No.20110490810)the Special Fund of China's Central Government for the Development of Local Colleges and Universities-the Project of National First-level Discipline in Oil and Gas Engineering
文摘With the aid of hydrogen permeating devices, the hydrogen permeation behaviors of X52 pipeline steel in NACE A solution with saturated H2S/CO2 were studied under the conditions of different ambient temperatures and pH values, and the hydrogen permeation behaviors of X52 pipeline steel in weld seam zone were comparatively studied. The experimental results show that the hydrogen permeation coefficient value is directly proportional to the time required for reaching the saturation anode current and inversely proportional to the saturation anode current, and the hydrogen permeation coefficient is influenced by the corrosion scales; the temperature is directly proportional to the saturation anode current, and the hydrogen permeation coefficient is influenced by the temperature and corrosion scales, heat-affected zone and matrix zone in NACE A solution with saturated H2S/CO2 at normal temperature. The hydrogen permeation coefficient in weld seam zone is larger than that in heat-affected zone which is further larger than that in matrix zone.
文摘CHINA is a great agricultural country,with a farming population that con-stitutes two-thirds of its nationaltotal. Since reform and opening tothe outside world, China’s agricultural produc-tion has developed rapidly. The total agricultur-al production for 2000 was 3.3 times that
基金supported by the Young Investigator Award received by Yan in 2006the Foundation for the Visiting PhD Candidate of the Chinese Academy of Science received by Liu in 2006
文摘Circular double stranded DNA has different topological states which are defined by their linking numbers. Equilibrium distribution of linking numbers can be obtained by closing
文摘While recent judicial interpretations released by the Supreme People’s Court, China’s top judicial organ, have addressed some ambiguities in the country’s two-year-old Property Law, they may give rise to new disputes, legal experts say.
文摘Initially, Osgood used the integral ∫dr/f（r）for an unicity crite, rion to the differential equation y＇ = f（y）, f （0） = 0. The trivial solution is unique iff this integral goes to the infinite at the origin. Then he can prove the unicity of the trivial solution of y＇ = y Ln｜Y｜, although the second member is not lipschitzian. Later, Bernfeld [1] shows that all the solutions of y＇ = f（y） do not explose iffthe same integral goes to the infinite at the infinite. Finally, we can adapt a result from the Cauchy works as follows： the trivial solution is a singular solution iffthe same integral vanishes at the origin. Using non standard analysis, we present the proofs of the different criterions and show that the Osgood integral was used by Cauchy before in the similar purpose.
基金Supported by the Natural Science Foundation of Education Department of Henan Province of China under Grant No.2011B110013
文摘The bounded and smooth solitary wave solutions of 10 nonlinear evolution equations with a positive fractional power term of dependent variable are successfully obtained by homogeneous balance principle and with the aid of sub-ODEs that admits a solution of sech-power or tanh-power type.In the special cases that the fractional power equals to 1 and 2,the solitary wave solutions of more than 10 important model equations arisen from mathematical physics are easily rediscovered.
