Abstract: Described is a deuterated compound, and preparation method and use thereof The deuterated compound I has a structure as shown in Formula (I), wherein A is H or D, and at least one of eight As is D; M is H or an alkali metal, an alkaline earth metal, or an ammonium radical. The present invention provides use of the deuterated compound I as an internal standard for measuring the content of a metabolite II in a biological sample, wherein the metabolite II has a structure as shown in a Formula (II); wherein A is H; M is H or an alkali metal, an alkaline earth metal, or an ammonium radical. The present invention uses the deuterated compound I as an internal standard to quantitatively analysis the content of metabolite II at lower content in biological samples, which can not only meet the requirements for the lower limit of quantitation, but also meet the requirements for DMPK studies in clinical trials.

Abstract: A skin layer of a superconducting tape has a woven mesh structure and is disposed on a surface of a superconducting tape. The skin layer of a superconducting tape solves the problem where a vapor layer generated when a superconductor is in a normal resistive state greatly reduces the efficiency of a heat exchange between the superconductor and liquid nitrogen. Further provided are the superconducting tape and a superconducting coil.

Abstract: Embodiments of the present disclosure disclose a method for processing privacy data of a block chain. When implemented by a block chain node, a specific implementation comprises: acquiring a data calculation transaction request initiated by a data user side based on a privacy smart contract; acquiring homomorphically encrypted source data according to the data calculation transaction request; invoking the privacy smart contract according to a calculation task in the data calculation transaction request; and performing an uplink operation on the data calculation transaction request and the calculation result to feed the data calculation transaction request and the calculation result back to the data user side of the data calculation transaction request, for the data user side to perform a homomorphic decryption and de-blinding on the calculation result, to acquire a plaintext calculation result. Thus, the scheme of processing the privacy data of the block chain is optimized.

Abstract: A test system and test method continuously and intelligently measures water content of subgrade in real time. The test system is based on the theory of resistivity, and is equipped with a wheeled machine to measure the water content of subgrade. The wheeled machine includes scroll roller. The test system includes: at least one set of electrode including four probes wherein detection parts of the four probes are linearly and equidistantly arranged on the scroll roller. The arrangement direction of the detection parts of the four probes is parallel to the axis of the scroll roller; a data integration apparatus is connected to the four probes and used for performing data calculation, analysis, and transmission; the electric source is connected to data integration apparatus and used for supplying a working current. The system and method can realize automatic signal collection, non-destructive detection of subgrade soil and dynamic water content measurement.

Abstract: Embodiments of the present disclosure disclose a method for processing privacy data of a block chain. When implemented by a block chain node, a specific implementation comprises: acquiring a data calculation transaction request initiated by a data user side based on a privacy smart contract; acquiring homomorphically encrypted source data according to the data calculation transaction request; invoking the privacy smart contract according to a calculation task in the data calculation transaction request; and performing an uplink operation on the data calculation transaction request and the calculation result to feed the data calculation transaction request and the calculation result back to the data user side of the data calculation transaction request, for the data user side to perform a homomorphic decryption and de-blinding on the calculation result, to acquire a plaintext calculation result. Thus, the scheme of processing the privacy data of the block chain is optimized.