摘要：Non-pillar mining technology with automatically formed roadway is a new mining method without coal pillar reservation and roadway *** stability control of automatically formed roadway is the key to the successful application of the new *** order to realize the stability control of the roadway surrounding rock,the mechanical model of the roof and rib support structure is established,and the influence mechanism of the automatically formed roadway parameters on the compound force is *** this basis,the roof and rib support structure technology of confined lightweight concrete is proposed,and its mechanical tests under different eccentricity are carried *** results show that the bearing capacity of confined lightweight concrete specimens is basically the same as that of ordinary confined concrete *** bearing capacity of confined lightweight concrete specimens under different eccentricities is 1.95 times higher than those of U-shaped steel *** comparing the test results with the theoretical calculated results of the confined concrete,the calculation method of the bearing capacity for the confined lightweight concrete structure is *** design method of confined lightweight concrete support structure is established,and is successfully applied in the extra-large mine,Ningtiaota Coal Mine,China.

摘要：J-aggregates of cyanine have shown great merits in tumor photothermal therapy(PTT)due to their distinct redshift absorption as well as superior photothermal conversion efficiency(PCE).However,due to the complexity of intermolecular interactions,especially the impact of steric hindrance on aggregation,exploring effective strategies to regulate the aggregation modes of organic materials remains ***,steric hindrance-regulated J-aggregation of near-infrared(NIR)cyanine was reported based on Pt-coordinated cyanine self-assembly with unexpected“butterfly effect”.Two Pt-coordinated cyanine dimers CyR-Pt(R=Me and Et)were synthesized and spontaneously self-assembled into aggregates in aqueous ***-Pt aggregates were loose and amorphous *** replacing ethyl with methyl to reduce steric hindrance,a tiny change resulted in the generation of tightly stacked cyanine J-aggregates(thickness less than 3 nm)observed in CyMe-Pt ***,this unexpected“butterfly effect”enabled CyMe-Pt J-aggregates to effectively inhibit reactive oxygen species and greatly improve its ***,CyMe-Pt J-aggregates with NIR-II absorption exhibited outstanding photothermal stability and higher PCE(η=37%)than CyEt-Pt disordered aggregates(η=20%).Evident tumor suppression performance of CyMe-Pt J-aggregates was validated under 980 nm laser irradiation,demonstrating its great potential in tumor PTT.

摘要：Shearing dislocation is a common failure type for rock–backfill interfaces because of backfill sedimentation and rock strata movement in backfill mining *** paper designed a test method for rock–backfill shearing *** digital image techno-logy and three-dimensional(3D)laser morphology scanning techniques,a set of 3D models with rough joint surfaces was ***,the mechanical behavior of rock–backfill shearing dislocation was investigated using a direct shear *** effects of interface roughness on the shear–displacement curve and failure characteristics of rock–backfill specimens were *** 3D fractal dimen-sion,profile line joint roughness coefficient(JRC),profile line two-dimensional fractal dimension,and the surface curvature of the frac-tures were *** correlation characterization of surface roughness was then analyzed,and the shear strength could be measured and calculated using *** results showed the following:there were three failure threshold value points in rock–backfill shearing dis-location:30%–50%displacement before the peak,70%–90%displacement before the peak,and 100%displacement before the peak to post-peak,which could be a sign for rock–backfill shearing dislocation *** surface JRC could be used to judge the rock–backfill shearing dislocation failure,including post-peak sliding,uniform variations,and gradient change,corresponding to rock–backfill disloca-tion failure on the field *** research reveals the damage mechanism for rock–backfill complexes based on the free joint surface,fills the gap of existing shearing theoretical systems for isomerism complexes,and provides a theoretical basis for the prevention and control of possible disasters in backfill mining.

摘要：在柔性设备和静态储能电网应用中,可充电水性锌离子电池展现出巨大的潜力.但其发展受到界面不稳定性引起的副反应及枝晶生长的阻碍.本研究中,我们采用了一种新颖的电解液设计,通过含大量孤电子对的亲锌葫芦[7]超分子来应对这一挑战.这些超分子因其独特的分子结构,能够在电化学循环中有效地吸纳和固定Zn离子,从而有效避免了Zn离子的无序迁移和枝晶的形成.超分子中丰富的孤对电子提供的Lewis碱性位点(如叔胺和羰基氧)作为Zn离子的供电子成核位点,促进了紧密成核.这些超分子与Zn离子之间的强烈相互作用,不仅提高了系统的稳定性,还显著抑制了不良副反应.因此,我们组装的对称电池和Zn//V_(2)O_(5)全电池均展示了长效的循环稳定性和卓越的库仑效率.

摘要：All-solid-state lithium batteries(ASSLBs)utilizing a nonflowing and low-flammable solid-state electrolyte are considered the most promising candidate to tackle the safety issue of stateof-the-art lithium ion batteries[1].However,recent studies have revealed that ASSLBs may not be as safe as *** high temperatures,various aging and degradation processes evolve inside ASSLBs,such as electrode decay,electrolyte decomposition。

摘要：Based on the running characteristics and high energy consumption of air compressors in coal mines,an air pressure PID closed loop control system has been designed in this *** system is composed of PLC, converter and sensors etc and adopts the control method of converter triple-evaporator which makes air supply"need-based".The designed system has been applied in multiple coal mines and the results show its energy saving is remarkable and potential application is widely.

摘要：岩体强度与裂隙参数是反映工程岩体质量的基本参数,其准确获取是进行地下工程围岩分级与支护合理设计优化的前提。传统的岩体强度测试方法需要对现场围岩取芯并运至实验室测试,测试结果难以反映工程现场环境下的岩体力学性质,而对于岩体强度与裂隙参数的原位测试方法研究较少。本文基于能量守恒定律,建立了岩石切削能密度与随钻参数的关系式,构建了岩体等效强度随钻反演模型(ES-DP模型),系统开展了岩体数字钻进试验。结果表明,相对于传统测试方法,岩体等效强度随钻测试结果平均差异率为2.4%,验证了ES-DP模型对岩体等效强度测试的有效性。在此基础上,建立了岩体裂隙参数随钻识别模型,与实际测量结果相比,该模型测得的岩体裂隙位置与宽度平均精度分别为1.8和1.6 mm,测试精度较高。基于上述研究,本文提出了一种岩体强度-裂隙随钻识别方法,为实现地下工程围岩强度参数与结构特征的原位实时测试提供了新方法。

摘要：The paper is concerned with the digital design of the system of servo-position control for medium-low power DC *** paper will be focused on the digitization design of the *** of PWM will be given first in this *** to the theory of PWM rules and the knowledge of computer control technology,the paper will design the digital servo-position system that has a good characteristic of stability and dynamic response.

摘要：There are large errors of linear measurement when the thermocouple measure temperature as temperature *** order to improve the measurement precision,the sensor cold junction compensation and nonlinear compensation are usually *** the circumstances that the cold junction’s temperature is determinate,there is biggish nonlinear between thermoelectric power and temperature signals of the thermocouple sensor’s *** order to solve the problem,this paper proposed a practical method of linear compensation,introduced the principle of linear compensation and gave the corresponding compensation circuit and circuit *** circuit has the characteristic of simpleness,high reliability,small linear error and so on.

摘要：The design of the power line carrier communication system was introduced in this paper,DSP was adopted as the hardware platform to complete the core *** sending terminal delivered the collecting data to the DSP receiving terminal through the power line carrier, and the DSP receiving terminal send the data to PC through a serial *** design improved the power line carrier communication system and the data transmission became faster and more *** experiment results showed that the PER of the receiving data is less than 0.4%, which satisfied the power line carrier communication requirement Our design is feasible and effective.