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Additional file 1: Fig. S1. Spatio-temporal distributions of contents of fluorescence components in Lake Shahu.

We synthesize lipophilic, highly efficient, and pH-insensitive oleic acid-modified quantum dots (QDs) with maximum emission at a wavelength of 628 nm. The pH sensing film is fabricated by encapsulating 5-hexadecanoylamino-fluorescein and QDs as the reference in D4-hydromed and plasticized polystyrene. Using a light-emitting diode with a central wavelength of 410 nm as an excitation source, it is shown that the emission wavelengths of the pH sensitive indicator and reference dye have no spectral overlap and match respectively the channels of a 3CCD (RGB) camera with low cross-talk. A series of validation experiments shows that this ratiometric pH optode has good properties of high sensitivity, long-term stability, and photostability. It had a fast response time of

A certain degree of private ownership of military human capital determines the uncertainty of its supply. simply by the efforts of monitoring that can not completely solve the problem of the owners of military human capital, as well as really solve the moral hazard existing in the military. By setting up a general parameterized commission-agent model to discuss the game between the military and the owner of military human capital, we design the contract that the military human capital is remunerated as the factor of production so as to find the Ways of self-supervised incentive for the owner of the military human capital.