“三软”地层巷道支护方式探讨

三软地层巷道的支护方式主要有架棚支护、衬砌封闭支护、可缩性U型钢支护、置换支护、锚喷网支护、锚喷多体联合支护。     

瓦斯及有毒、易爆气体浓度检测仪的研究与开发

近年来，我国煤矿多次发生瓦斯爆炸事故，瓦斯浓度检测已成为煤炭行业安全生产的突出问题。煤气作为一种可燃性、有毒气体，也是矿井大气中的重要组分，具有极强的危害性。随着单片机技术的进步，便携式仪器得到了迅速发展，其智能水平也有了明显的提高，逐渐成为一类主流的测量仪器。本文阐述了多组分气体的测量原理、及其软件硬件实现，设计了一种能检测瓦斯、煤气浓度的实用仪器。该仪器作为便携式多功能仪器，采用可充电电池供电，显示气体浓度值，并具有声光报警功能。     

影响预交联凝胶颗粒性能的因素分析

从凝胶颗粒的基本特征、外观形态、粒径分布分析入手,研究了膨胀倍数及粘弹性等特征参数,评价了颗粒的物理化学性能。实验结果表明,预交联凝胶颗粒适宜于高矿化度的地层,对pH值无具体要求,长期热稳定性好。在95℃条件下考察两年和120℃条件下考察一年均未发现脱水现象。膨胀倍数在30-200倍,也可根据实际选择合适的膨胀倍数。     

具有GSM短信功能的闸门开度仪的研制

介绍了具有GSM短信功能的闸门开度仪的基本原理、硬件及软件设计.该仪器功耗小、成本低、具有极强的抗干扰能力和极高的稳定性,特别适用于要求通讯频次低、稳定性、可靠性高的场合.     

往复压缩机密封材料和结构的优选与优化

对3台4RDS往复压缩机组因填料和刮油环密封泄漏难以保障机组安全运行的问题,进行了填料和刮油环密封材料的优选和其密封结构的优化。     

科学理性在物理教学中的显化

现在的科学教育中,科学理性由于它的隐含性而遭到忽视和冷落。这种状况造成了学生科学素质的低层化和人文素质的片面性。针对这种情况,本文从物理学的教学角度来讨论如何在具体学科的教学中显化科学理性、加强科学理性教育,从而真正达到科学知识与人文精神相互融合、相互促进、共同发展。     

Na2GdMg2V3O12:Sm3+ phosphors for three-mode optical temperature sensing

Multi-mode optical thermometry is emerging as a promising technique for accurate temperature measurement. Here, a series of Na₂GdMg₂V₃O₁₂:Sm³⁺ (NGMVO:xSm³⁺) phosphors with dual-emission centers were successfully elaborated. Irradiated by 349 nm light, NGMVO:Sm³⁺ can generate emissions from VO₄³⁻ and Sm³⁺ simultaneously due to energy transfer between them. Benefitting from difference of thermal quenching performance of two luminescent centers, fluorescence intensity (FI), fluorescence intensity ratio (FIR), and Commission Internationale de L'Eclairage coordinate modes of NGMVO:Sm³⁺ thermometer were designed. Maximum relative sensitivities (S_R) are found to be as high as 2.21 %K⁻¹, 2.12 %K⁻¹, and 0.244 %K⁻¹, respectively. Besides, with temperature increasing, S_R values of FI and FIR modes decrease slowly. Their minimal S_R values between 303 and 513 K maintain above 1.36 %K⁻¹ and 1.08 %K⁻¹, respectively. Our findings reveal that NGMVO:Sm³⁺ phosphors have promising applications for multimode temperature senor.     

湿陷性黄土地区垃圾填埋场地基处理

阐述了湿陷性黄土地区多层建筑工程中填土坑的几种地基处理方法,列举了工程实例说明该地区采用复合载体夯扩桩处理填土坑的处理效果和建筑物周边的防水的重要性.     

GaN基异质外延生长的ZnO单晶电输运特性研究

报道了一种新方法生长的ZnO单晶的电输运特性,利用该方法在GaN外延膜表面生长了尺寸为25 mm×25 mm,平均厚度7 mm的ZnO单晶块。通过研究ZnO单晶不同深度处的电输运特性,判断了ZnO单晶内部不同位置的结晶质量。以GaN表面为起始面,沿[0002]方向,随着距GaN表面距离的增加,常温下的ZnO单晶载流子浓度从1.28×10¹⁹降到4.00×10¹⁷ cm^-3,载流子迁移率从64.9升至144 cm²/(V·s),电阻率从7.53×10^-3升至1.09×10^-1Ω·cm。位错密度计算结果表明,随着远离GaN衬底,晶体内位错密度逐渐减少,二次离子质谱测试结果中,Ga⁺等杂质含量随着远离GaN衬底逐渐减少,在距离GaN表面约4 mm以后,主要杂质含量明显降低。由此表明,采用价格相对较低的GaN衬底可以获得较大尺寸,品质较好的ZnO单晶。     

Trimodal Sono/Photoinduced Focal Therapy for Localized Prostate Cancer: Single-Drug-Based Nanosensitizer under Dual-Activation

Focal therapy, or partial gland ablation, represents the middle ground between active surveillance and definitive treatment strategies against localized prostate cancer (PCa), among which the ultrasound- and light-mediated focal therapies are quite promising. Herein, for the first time in the literature, a novel polysaccharide-based nanoprodrug is fabricated for synergistic sonodynamic therapy and phototherapy against localized PCa. Specifically, the cyanine dye IR806 is conjugated to chondroitin sulfate (CS) via disulfide linkages to obtain CS-ss-IR806 (CSR) conjugates, which then self-assemble to form CSR nanoparticles (NPs) with properties of enhanced endocytosis, redox/hyaluronidase-responsiveness, and mitochondria-targeted ability. In contrast to free sensitizers, CSR NPs reveal dramatically enhanced water solubility, substantially lower dark toxicity, and superior biocompatibility. Encouragingly, favorable hyperthermia and high reactive oxygen species generation are observed on exposing CSR NPs to combined sono/photoirradiation. In a PCa tumor-bearing mice model, intratumoral injection with a markedly low dose of CSR NPs followed by dual-irradiation results in superior trimodal anticancer efficacy when compared with either monoirradiation strategy. Such synergistic antitumor efficacy is further demonstrated to be associated with the common and complementary mechanisms of sonotherapy and phototherapy. This work provides a promising approach as a next-generation focal therapy strategy against localized PCa.