No one can know who was the first female mathematician, but Hypatia was certainly one of the earliest.

However, once fully operational, it will offer the PLA Navy with a much more credible sea-based nuclear retaliation capability than that offered by its predecessor Type 092 Xia class.

A new method is presented to calculate the field distribution in the channel guide-using Weber-Schafheitlin integral and field matching method. Some numerical results are given for several cases.