Abstract: A positioning system by visible light includes at least one luminaire, at least one positioning transceiver and a server. The luminaire is disposed at a specific position and has a first identification code, and emits the first identification code in a selected signal form. Each positioning transceiver has a second identification code, and further includes a receiving device and a wireless transceiver. The receiving device movably receives the first identification and demodulates the first identification code. The wireless transceiver transmits the first and the second identification codes to a receiving terminal. The server is coupled to the at least one positioning transceiver via the receiving terminal, and obtains the first and the second identification codes so as to position the at least one positioning transceiver in a space defined by the at least one luminaire.

Abstract: A positioning system by visible light includes at least one luminaire, at least one positioning transceiver and a server. The luminaire is disposed at a specific position and has a first identification code, and emits the first identification code in a selected signal form. Each positioning transceiver has a second identification code, and further includes a receiving device and a wireless transceiver. The receiving device movably receives the first identification and demodulates the first identification code. The wireless transceiver transmits the first and the second identification codes to a receiving terminal. The server is coupled to the at least one positioning transceiver via the receiving terminal, and obtains the first and the second identification codes so as to position the at least one positioning transceiver in a space defined by the at least one luminaire.

Abstract: A positioning system by visible light includes at least one luminaire, at least one positioning transceiver and a server. The luminaire is disposed at a specific position and has a first identification code, and emits the first identification code in a selected signal form. Each positioning transceiver has a second identification code, and further includes a receiving device and a wireless transceiver. The receiving device movably receives the first identification and demodulates the first identification code. The wireless transceiver transmits the first and the second identification codes to a receiving terminal. The server is coupled to the at least one positioning transceiver via the receiving terminal, and obtains the first and the second identification codes so as to position the at least one positioning transceiver in a space defined by the at least one luminaire.

Abstract: A positioning system by visible light includes at least one luminaire, at least one positioning transceiver and a server. The luminaire is disposed at a specific position and has a first identification code, and emits the first identification code in a selected signal form. Each positioning transceiver has a second identification code, and further includes a receiving device and a wireless transceiver. The receiving device movably receives the first identification and demodulates the first identification code. The wireless transceiver transmits the first and the second identification codes to a receiving terminal. The server is coupled to the at least one positioning transceiver via the receiving terminal, and obtains the first and the second identification codes so as to position the at least one positioning transceiver in a space defined by the at least one luminaire.

Abstract: Provided is a non-invasive prenatal testing method to test whether a target fetus has autosomal aneuploidy. The method includes: preparing control plasma samples and a target plasma sample; sequencing and obtaining the amount of total cfDNA and the amount of cfDNA of target chromosome k from each of the control plasma samples and the target plasma sample; respectively obtaining yk values from the control plasma samples and the target plasma sample, wherein each yk value is the ratio of the amount of cfDNA of target chromosome k to the amount of total cfDNA in each of the plasma samples; obtaining a mk value; obtaining a target Rk value, which is a normalized ratio of the target yk value to the mk value; and comparing whether the target Rk value is significantly different from the reference dataset.

Abstract: Provided is a non-invasive prenatal testing method based on whole-genome tendency scoring and adapted to test whether a pregnant woman's fetus has autosomal aneuploidy. The method includes: creating a database of mk values which equal the averages of length proportions of health persons' chromosome k; obtaining the pregnant woman's and her fetus' chromosomal data yk from the pregnant woman's plasma; obtaining p values by the ratio of the yk values to the mk values; and analyzing p values to determine whether the target chromosome has chromosome aneuploidy. The comparable data is increased and thus test accuracy is enhanced by comparing the p values and the p values in a database. Due to an abundance of comparable data, the method of the present invention is accurate even when performed in the first trimester, such that pregnant women can know as soon as possible whether their fetuses' chromosomes are normal.