Abstract: Disclosed is a method for carrying out ecological water supplement by using tidal power, including the following steps: constructing a first water supplying river channel at an upper and middle reach of an artery and tributaries of a river channel, storing water at high tide and supplying water to the tributaries at low tide based on the first water supplying river channel; and setting a storage tank at an urban river channel, constructing a second water supplying river channel at an other end of the storage tank connected with the urban river channel, and supplying the water to a city based on the interconnected storage tank, the urban river channel and the second water supplying river channel.

Abstract: Provided are a compound represented by formula (I), a stereoisomer, pharmaceutically acceptable salt, solvate and eutectic or deuterated material thereof, or a pharmaceutical composition comprising same, and a use thereof as a PARP-1 inhibitor in the preparation of a drug for treating related diseases.

Abstract: The present disclosure provides a direct current (DC) transformer error detection apparatus for a pulsating harmonic signal, including a DC and pulsating harmonic current output module and an external detected input module, where the DC and pulsating harmonic current output module outputs a DC and a DC superimposed pulsating harmonic current to an internal sampling circuit and a self-calibrated standard resistor array; and the internal sampling circuit converts the input DC and the input DC superimposed pulsating harmonic current into a voltage signal, and sends the voltage signal to an analog-to-digital (AD) sampling and measurement component through a front-end conditioning circuit and a detected input channel. The DC transformer error detection apparatus can complete self-calibration for measurement of the DC and the pulsating harmonic signal on a test site.

Abstract: Disclosed in the present invention is a method for preparing 2-iodo aryl ether under the action of alkali metal hydride: adding alkali metal hydride and phenol to a solvent, then adding 1,2-diiodoarene, and reacting at 0-100° C. to obtain a 2-iodo aryl ether product. The coupling process of the present invention does not require the addition of a transition metal catalyst, and does not cause metal contamination to the product; the method of the present invention can be performed at room temperature and has high functional group compatibility, and solves the problem that existing metal-catalysed coupling to aryl ether reactions need to be performed at a relatively high temperature.

Abstract: Liver-specific promoters and application thereof are provided. A set of small-size recombinant nucleic acid sequences for regulating high specific expression of genes in a liver system are provided. Compared with the currently reported other sequences of similar size, the said recombinant regulatory sequence fragment has the advantage that the ability of driving expression of reporter gene and human coagulation factor FVIII in the liver system is significantly enhanced, thereby being suitable for recombinant adeno-associated virus (rAAV)-mediated gene therapy.

Abstract: Implementations of the present specification disclose methods, devices, and apparatuses for determining a feature interpretation of a predicted label value of a user generated by a GBDT model. In one aspect, the method includes separately obtaining, from each of a predetermined quantity of decision trees ranked among top decision trees, a leaf node and a score of the leaf node; determining a respective prediction path of each leaf node; obtaining, for each parent node on each prediction path, a split feature and a score of the parent node; determining, for each child node on each prediction path, a feature corresponding to the child node and a local increment of the feature on the child node; obtaining a collection of features respectively corresponding to the child nodes; and obtaining a respective measure of relevance between the feature corresponding to the at least one child node and the predicted label value.

Abstract: Implementations of the present specification disclose methods, devices, and apparatuses for determining a feature interpretation of a predicted label value of a user generated by a GBDT model. In one aspect, the method includes separately obtaining, from each of a predetermined quantity of decision trees ranked among top decision trees, a leaf node and a score of the leaf node; determining a respective prediction path of each leaf node; obtaining, for each parent node on each prediction path, a split feature and a score of the parent node; determining, for each child node on each prediction path, a feature corresponding to the child node and a local increment of the feature on the child node; obtaining a collection of features respectively corresponding to the child nodes; and obtaining a respective measure of relevance between the feature corresponding to the at least one child node and the predicted label value.