摘要：It has made significant progress in catalyst andreactor design for commercial current densities in CO_(2) electroreduction(CO_(2)ER).However,these catalyst systems haverarely been applied for a C2 gas product of ethane due to itscommonly inferior selectivity relative to other C1 and ***,bamboo-like amorphous Ni(OH)_(2) nanotubes wrapped Cu nanoparticles composite(Cu NPs@aNi(OH)_(2)NTs)are constructed for selective CO_(2)ER to ethane ina flow *** unique structure of Cu NPs@a-Ni(OH)_(2) NTsprovides a confined geometry to improve the adsorption of thereactive *** interface of Cu NPs and a-Ni(OH)_(2) NTs isstabilized by generating some NiOH *** producedCu@NiOH interface enhances the activation of CO_(2) to*C*OOH and strengthens the adsorption of*COL on Cu sitefor more*COH formation and its dimerization for finalethane ***,amorphous Ni(OH)_(2) nanotubes promote water dissociation for the hydrogenation ofcarbonous intermediates,contributing to ethane *** synthesized Cu NPs@a-Ni(OH)_(2) NTs can reach a Faradaicefficiency of 48.3%and a partial current density of−226.7 mA cm^(−2) for ethane at−0.7 V in a flow cell,with aremarkable stability for 24 *** work provides a rationalstrategy to engineer Cu-based composite for selective CO_(2)ERto ethane in a flow cell.

摘要：Industrial development can enrich people＇s lives, but it also causes environmental pollution, which is an area of significant concern among governments, consumers, and companies. Governments formulate some environmental policies, which motivate industry by providing greater incentives for green product development. Consumers are classified into two groups - ordinary and green market segments - according to their environmental awareness and attitudes. In this regard, companies need to reconsider their primary product design strategies. By investigating the interactions among customers＇ preferences, firms＇ product strategies, and government subsidy policies, this paper presents a theoretical model for new product design strategies. After detailed theoretical analysis of such strategies, we found that to motivate firms to choose environmentally friendly product design strategies, governments should inaugurate effective subsidy policies. After simultaneously considering environmental issues and firms＇ benefits, we designed a subsidy policy. With such a policy, firms can change their primary product design strategies and develop both green and ordinary products, thereby increasing the firms＇ profits and improving the total environmental quality.

摘要：A 476 MHz resonant stripline beam position monitor(BPM)is planned to be installed in an infrared free electron laser machine at National Synchrotron Radiation *** type of BPM was developed based on a standard stripline BPM by moving the coupling feedthrough closer to the short end downstream,which introduces a resonance and therefore a capability for higher resolution compared with broadband *** design and offline measurement results of the prototype are shown in this *** design goal is the optimization of the central frequencies and corresponding quality factors of the three intrinsic transverse electromagnetic modes to roughly476 MHz and 30,respectively,the fulfillment of which is demonstrated by a transmission parameter test via a network *** voltage signal modeling and an estimation of the position resolution of the designed BPM are shown in ***,a calibration test of the prototype using the stretched wire method is presented,including a description of the test stand and the evaluation of position sensitivities.

摘要：Cancer is the most common cause of human mortality and has created an unbridgeable health gap due to its unrestrained aberrant proliferation,rapid growth,metastasis,and high *** two-dimensional cell culture and animal models for tumor diagnostic and therapeutic studies have extremely low clinical translation rates due to their intrinsic *** tumor models are therefore required for cancer *** human three-dimensional(3D)cancer models stand out for their ability to better replicate the spatial organization,cellular resources,and microenvironmental features(e.g.,hypoxia,necrosis,and delayed proliferation)of actual human ***,the fabrication of these models can be achieved by an emerging technology known as 3D bioprinting,which allows for the fabrication of living structures by precisely regulating the spatial distribution of cells,biomolecules,and matrix *** aim of this paper is to review the current technologies and bioinks associated with 3D bioprinted cancer models for glioma,breast,liver,intestinal,cervical,ovarian,and neuroblastoma,as well as,advances in the applications of 3D bioprinted-based tumor models in the fields of tumor microenvironment,tumor vascularization,tumor stem cells,tumor resistance and therapeutic drug screening,tumorimmunotherapy,and precision medicine.

摘要：Passive filtering of neural networks with time-invariant delay and quantized output is considered.A criterion on the passivity of a filtering error system is proposed by means of the Lyapunov-Krasovskii functional and the Bessel-Legendre *** on the criterion,a design approach for desired passive filters is developed in terms of the feasible solution of a set of linear matrix ***,analyses and syntheses are extended to the time-variant delay situation using the reciprocally convex combination ***,a numerical example with simulations is used to illustrate the applicability and reduced conservatism of the present passive filter design approaches.

摘要：During advanced water detection using the transient electromagnetic method, the exploration effect for water-rich area is often poor due to the interference of bolts that are distributed in different positions in working face. Thus, the study on the interference characteristics of bolts in different states has important directive significance for improving the acquisition quality and data processing method in water detection. Based on the analysis of the distribution laws of magnetic field excited by small multi-turn coincident loop in full space of homogeneity, the test on the interference of bolts has been designed in the mine. Through drilling 18 holes around the overlapping coil in the working face, mass data are collected in order with the posi- tion change and the exposed bolt length. The results of comprehensive data analysis show that the transient electromagnetic field is strongly interfered as the distance between the bolt and the center of the coil is less than 3 m, and the interference varies greatly as the distance varies. On the other hand, the field induced by the bolts can be ignored as the distance exceeds 3 m. The findings can help to improve data acquisition and correction during advanced water detection when using the transient electromagnetic method.

摘要：The separator is a key component of sodium-ion battery,which greatly affects the electrochemical performances and safety characteristics of the *** glass fiber separator cannot meet the requirements of large-scale application because of high cost and poor mechanical ***,the novel composite separators are prepared by a simple slurry sieving process using glass fiber separator scraps and ordinary qualitative filter paper as raw *** the composite mass ratio is 1:1,the composite separator has excellent comprehensive properties,including tensile strength of 15.8 MPa,porosity of 74.3%,ionic conductivity of 1.57×10^(-3)S·cm^(-1)and thermal stability at 210℃.The assembled sodium-ion battery shows superior cycling performance(capacity retention of 94.1%after 500 cycles at 1C)and rate capacity(retention rate of 87.3%at 10C),and it maintains fine interface *** above results provide some new ideas for the separator design of high-performance and low-cost sodium-ion batteries.

摘要：植物病原真菌严重威胁作物安全,迫切需要开发新型高效低毒的杀菌剂.因此,设计、合成了一系列新型苯甲酸噻唑酯衍生物.体外抗真菌活性筛选结果表明,化合物3、5和8对灰霉病菌和核盘病菌均表现出良好的抗真菌活性.其中化合物8对灰霉病菌和核盘病菌的EC50值分别为13.82和3.66 mg/L.初步的生理生化实验结果表明化合物8对菌丝细胞膜造成一定程度的损伤.

摘要：The strict avalanche criterion(SAC)is one of the most important cryptographic criteria for substitution boxes(S-boxes)used in many symmetric encryption ***,there are few constructive methods for S-boxes fulfilling the SAC until *** this paper,to construct S-boxes satisfying the SAC directly,we generalize the concatenation techniques of Boolean functions to *** the idea of concatenating small variable S-boxes,we present a simple yet effective construction method of S-boxes satisfying the ***,a simple example on how to construct SAC S-boxes with large input variables by small variables SAC S-boxes is given.

摘要：一台相对论返波振荡器匀场超导磁体现已完成设计、制造和测试,磁体室温孔径为30mm、中心场为5.51T.为了提高磁场的均匀性,设计的磁体由3个同轴线圈组成.所有的超导线圈串联运行,并由1台电源供电.磁体轴向从-30mm至30mm处磁场均匀性优于±0.5%.磁体可以通过超导开关进行闭环运行.此外,利用一对高温超导电流引线和两级GM制冷机(4.2K@1.5 W)可以实现超导磁体的零液氦蒸发.这里给出了该超导磁体的设计、制造、力学分析,并给出了磁体的测试结果.