利用数学公式挑选完美紧身袜
If you thought wearing a pair of tights is a simple matter, you'd be wrong. A male scientist has devised a mathematical formula to help women choose the perfect pair of tights to keep their legs warm this winter.
如果你以为穿一件紧身袜是件简单的事，那你就错了。一位男性科学家设计了一条数学公式，用于帮助女性挑选在冬天为双腿保暖的完美紧身袜。
Dr James Hind came up with the equation to determine the most suitable fabric thickness depending on the weather conditions.
The 39-year-old says the secret to deciding what stockings to pop on the morning all depends on wind speed and temperature. The formula then helps calculate what denier, or thickness, to choose to avoid being too hot or cold throughout the day.
The mathematician designed the equation after he had to wear green stockings when he worked at the Tales of Robin Hood, a former tourist attraction in Nottingham.
He said: 'I worked in tights day in and day out for a year and I know the value of properly warm tights on a cold day. I worked there 15 years ago in 1997. My 110 denier thick tights saved my life in the winter. I made those tights my basis for the formula because they should see anybody through cold and windy weather, and then when it's lovely and sunny, the denier recommendation reduces.'
The mathematician claims the complex-looking formula will work across the UK as it takes into consideration local weather conditions.
His formula builds the temperature (t) and wind speed (w) into a forecast to calculate the thickness of tights most appropriate. The equation uses the sigmoid curve to create a scale to determine the denier or density of fiber needed (d).