[Objective] The research aimed to understand the high and efficiency technique in intersubspecific hybrid rice Yongyou No.9.[Method] We conducted the correlation analysis,regression analysis and path analysis of inter...[Objective] The research aimed to understand the high and efficiency technique in intersubspecific hybrid rice Yongyou No.9.[Method] We conducted the correlation analysis,regression analysis and path analysis of intersubspecific hybrid rice Yongyou No.9 based on the data of its ear,grain and weight at different yield levels.[Result]The performance of ear,grain and weight in Yongyou No.9 showed significant difference among different yield levels.The enhancement of effective ears would restrain the number of per ear total grains.It was found that the direct contributions of main economic traits to yield were determined to be per ear total grainseffective earseed setting rate1 000-grain weight.[Conclusion]The high-yield and effective cultivation techniques were suggested as follows：on the basis of certain effective ear number,grain number per ear should be mainly focused with a consideration to 1 000-grain weight.展开更多
Least Number of Periodic Points of Self-maps of Lie Groups Jerzy JEZIERSKI Abstract There are two algebraic lower bounds of the number of n-periodic points of a self-map f:M→M of a compact smooth manifold of dimensio...Least Number of Periodic Points of Self-maps of Lie Groups Jerzy JEZIERSKI Abstract There are two algebraic lower bounds of the number of n-periodic points of a self-map f:M→M of a compact smooth manifold of dimension at least 3:NF_n(f)=min{#Fix(g^n);g^f;g is continuous}and NJD_n(f)=min{#Fix(g^n);g^f;g is smooth}.In general,NJD_n(f)may be much greater than NF_n(f).If M is a torus,then the invariants展开更多
In the construction of horizontal wells, different drilling assembly, drilling parameters, drilling fluid system and directional control technology are selected for different intervals, and wireless tracking monitorin...In the construction of horizontal wells, different drilling assembly, drilling parameters, drilling fluid system and directional control technology are selected for different intervals, and wireless tracking monitoring while drilling is adopted to adjust the bit position at any time to control the well trajectory. According to the geological logging, engineering logging and physical logging data, the formation encountered was judged, and the purpose of safe and efficient drilling was achieved.展开更多
基金Supported by Science Program Foundation of Taizhou(091KY01)~~
文摘[Objective] The research aimed to understand the high and efficiency technique in intersubspecific hybrid rice Yongyou No.9.[Method] We conducted the correlation analysis,regression analysis and path analysis of intersubspecific hybrid rice Yongyou No.9 based on the data of its ear,grain and weight at different yield levels.[Result]The performance of ear,grain and weight in Yongyou No.9 showed significant difference among different yield levels.The enhancement of effective ears would restrain the number of per ear total grains.It was found that the direct contributions of main economic traits to yield were determined to be per ear total grainseffective earseed setting rate1 000-grain weight.[Conclusion]The high-yield and effective cultivation techniques were suggested as follows：on the basis of certain effective ear number,grain number per ear should be mainly focused with a consideration to 1 000-grain weight.
文摘Least Number of Periodic Points of Self-maps of Lie Groups Jerzy JEZIERSKI Abstract There are two algebraic lower bounds of the number of n-periodic points of a self-map f:M→M of a compact smooth manifold of dimension at least 3:NF_n(f)=min{#Fix(g^n);g^f;g is continuous}and NJD_n(f)=min{#Fix(g^n);g^f;g is smooth}.In general,NJD_n(f)may be much greater than NF_n(f).If M is a torus,then the invariants
文摘In the construction of horizontal wells, different drilling assembly, drilling parameters, drilling fluid system and directional control technology are selected for different intervals, and wireless tracking monitoring while drilling is adopted to adjust the bit position at any time to control the well trajectory. According to the geological logging, engineering logging and physical logging data, the formation encountered was judged, and the purpose of safe and efficient drilling was achieved.
