Considered in this note are numerical tracking algorithms for the accurate following of implicit curves. We start with a fixed point on the curve, and then systematically place on it additional points, one after the o...Considered in this note are numerical tracking algorithms for the accurate following of implicit curves. We start with a fixed point on the curve, and then systematically place on it additional points, one after the other. In this note we first go over the basic procedure of moving forward tangentially from an already placed point then orthogonally returning to the curve. Next, we further consider higher order forward stepping procedures for greater accuracy. We note, however, that higher order methods, desirable for greater accuracy, may harbor latent instabilities. This note suggests ways of holding such instabilities in check, to have stable and highly accurate tracing methods. The note has several supporting numerical examples, including the rounding of a dynamical “snap-through” point.展开更多
The "Two Leaps" put forward by Deng xiao-ping on agriculture are expounded in the paper. The first leap is from the people's commune to family land contract operation system. The weaknesses of people'...The "Two Leaps" put forward by Deng xiao-ping on agriculture are expounded in the paper. The first leap is from the people's commune to family land contract operation system. The weaknesses of people's commune and innovation of family land contract operation system are analyzed. It is pointed out that the family contact operation system is the expansion and development of collective economy. The second leap is to develop appropriate scale operation and collective economy. The shortages of family contract system are analyzed. It is put forward that realizing scale operation of agriculture is the necessary demand for production development and collective economy road is the inevitable way for realizing Chinese agricultural appropriate scale operation. "Two leaps" gives clears way of agricultural modernization:consolidating the thoughts of starting from the reality, insisting the guidance of the fundamental position of agriculture and further promoting agricultural development; persistently stabilizing and perfecting rural basic operation system and timely promote rural system innovation; stimulating the thought that science and technology is the prior productiveness and developing agricultural modernization in a better and faster way.展开更多
Hongkong’s smooth return creates vast prospect and numerous opportunities for Guangdong-Hongkong economic cooperation. Over the past decade the cooperation has gone a long way, from non-governmental to governmental, ...Hongkong’s smooth return creates vast prospect and numerous opportunities for Guangdong-Hongkong economic cooperation. Over the past decade the cooperation has gone a long way, from non-governmental to governmental, from processing trade to high technology. Presently, it has become a highprofile activity which covers various areas.More than 20,000 representatives from 5,063 corporations participated the symposium. And 1,559 agreements, involving $ 13.159 billion, were signed. Of the investment, $8.7851 billion, or 66.8 per cent is from overseas investors. Of the agreements, 810 or 65 per cent, are high new展开更多
Digital commerce and new retail point to the future of consumption in China.In 2014,I wrote a book titled China’s Super Consumers:What 1 Billion Customers Want and How to Sell It to Them.The book explained and examin...Digital commerce and new retail point to the future of consumption in China.In 2014,I wrote a book titled China’s Super Consumers:What 1 Billion Customers Want and How to Sell It to Them.The book explained and examined the development of China’s consumer and retail evolution.展开更多
Space exploration should benefit human development, not worsen conflict On May 30, U.S. space agency NASA in partnership with Tesla CEO Elon Musk’s other company, Space X, sent two astronauts to the International Spa...Space exploration should benefit human development, not worsen conflict On May 30, U.S. space agency NASA in partnership with Tesla CEO Elon Musk’s other company, Space X, sent two astronauts to the International Space Station(ISS), the multinational space laboratory in Earth’s orbit. Much has been made of the publicprivate partnership represented by Space X playing such a prominent role. In fact, U.S. companies have always manufactured vehicles for NASA. For example.展开更多
In this paper,we introduce the method of leaps and bounds regression which canbe used to select variables quickly and obtain the best regression models-These models con-tain one variable, two variables, three variable...In this paper,we introduce the method of leaps and bounds regression which canbe used to select variables quickly and obtain the best regression models-These models con-tain one variable, two variables, three variables and so on- The results obtained by usingleaps and bounds regression were compared with those achieved by using stepwise regressionto lead to the conclusion that leaps and bounds regression is an effective method.展开更多
文摘Considered in this note are numerical tracking algorithms for the accurate following of implicit curves. We start with a fixed point on the curve, and then systematically place on it additional points, one after the other. In this note we first go over the basic procedure of moving forward tangentially from an already placed point then orthogonally returning to the curve. Next, we further consider higher order forward stepping procedures for greater accuracy. We note, however, that higher order methods, desirable for greater accuracy, may harbor latent instabilities. This note suggests ways of holding such instabilities in check, to have stable and highly accurate tracing methods. The note has several supporting numerical examples, including the rounding of a dynamical “snap-through” point.
文摘The "Two Leaps" put forward by Deng xiao-ping on agriculture are expounded in the paper. The first leap is from the people's commune to family land contract operation system. The weaknesses of people's commune and innovation of family land contract operation system are analyzed. It is pointed out that the family contact operation system is the expansion and development of collective economy. The second leap is to develop appropriate scale operation and collective economy. The shortages of family contract system are analyzed. It is put forward that realizing scale operation of agriculture is the necessary demand for production development and collective economy road is the inevitable way for realizing Chinese agricultural appropriate scale operation. "Two leaps" gives clears way of agricultural modernization:consolidating the thoughts of starting from the reality, insisting the guidance of the fundamental position of agriculture and further promoting agricultural development; persistently stabilizing and perfecting rural basic operation system and timely promote rural system innovation; stimulating the thought that science and technology is the prior productiveness and developing agricultural modernization in a better and faster way.
文摘Hongkong’s smooth return creates vast prospect and numerous opportunities for Guangdong-Hongkong economic cooperation. Over the past decade the cooperation has gone a long way, from non-governmental to governmental, from processing trade to high technology. Presently, it has become a highprofile activity which covers various areas.More than 20,000 representatives from 5,063 corporations participated the symposium. And 1,559 agreements, involving $ 13.159 billion, were signed. Of the investment, $8.7851 billion, or 66.8 per cent is from overseas investors. Of the agreements, 810 or 65 per cent, are high new
文摘Digital commerce and new retail point to the future of consumption in China.In 2014,I wrote a book titled China’s Super Consumers:What 1 Billion Customers Want and How to Sell It to Them.The book explained and examined the development of China’s consumer and retail evolution.
文摘Space exploration should benefit human development, not worsen conflict On May 30, U.S. space agency NASA in partnership with Tesla CEO Elon Musk’s other company, Space X, sent two astronauts to the International Space Station(ISS), the multinational space laboratory in Earth’s orbit. Much has been made of the publicprivate partnership represented by Space X playing such a prominent role. In fact, U.S. companies have always manufactured vehicles for NASA. For example.
文摘In this paper,we introduce the method of leaps and bounds regression which canbe used to select variables quickly and obtain the best regression models-These models con-tain one variable, two variables, three variables and so on- The results obtained by usingleaps and bounds regression were compared with those achieved by using stepwise regressionto lead to the conclusion that leaps and bounds regression is an effective method.
