In this letter, we present a wireless sensor network for monitoring the maturity stage of fruit. A dual-polari- zation coupled patch sensor, which is robust to environmental changes, was designed to operate at 2.45 GH...In this letter, we present a wireless sensor network for monitoring the maturity stage of fruit. A dual-polari- zation coupled patch sensor, which is robust to environmental changes, was designed to operate at 2.45 GHz. It was attached to a Durian fruit for a period of days to measure the magnitude of mutual coupling corresponding mainly to the starch concentration of its pulp. Signal was transmitted from a sensor node, via tree nodes, to a master node that displays the variations occurring in the period. The maximum mutual coupling occurred at the maturity stage of 60% whereas the minimum occurred at 70%. These results demonstrate that this wireless sensor network can enable fruit growers to harvest their Durians at an appropriate time, providing a reliable quality control for export.展开更多
If we want to improve our way of teaching, one way is to teach reading in three stages: Pre- reading stage, while-reading stage, and post- reading stage. Each stage has a different goal and deals with different readin...If we want to improve our way of teaching, one way is to teach reading in three stages: Pre- reading stage, while-reading stage, and post- reading stage. Each stage has a different goal and deals with different reading strategies. Prereading means before the text is read. In while reading stage, we have looked at the main reading skills: skimming, scanning , reading for detail , drawing inferences about the author's purpose and intention. Post - reading stage mainly focuses on the exploitation of the text. It aims to help the reader understand the content and structure of the text, as well as the author's purpose in writing it.展开更多
文摘In this letter, we present a wireless sensor network for monitoring the maturity stage of fruit. A dual-polari- zation coupled patch sensor, which is robust to environmental changes, was designed to operate at 2.45 GHz. It was attached to a Durian fruit for a period of days to measure the magnitude of mutual coupling corresponding mainly to the starch concentration of its pulp. Signal was transmitted from a sensor node, via tree nodes, to a master node that displays the variations occurring in the period. The maximum mutual coupling occurred at the maturity stage of 60% whereas the minimum occurred at 70%. These results demonstrate that this wireless sensor network can enable fruit growers to harvest their Durians at an appropriate time, providing a reliable quality control for export.
文摘If we want to improve our way of teaching, one way is to teach reading in three stages: Pre- reading stage, while-reading stage, and post- reading stage. Each stage has a different goal and deals with different reading strategies. Prereading means before the text is read. In while reading stage, we have looked at the main reading skills: skimming, scanning , reading for detail , drawing inferences about the author's purpose and intention. Post - reading stage mainly focuses on the exploitation of the text. It aims to help the reader understand the content and structure of the text, as well as the author's purpose in writing it.