剖析导火索燃烧时的透火原因

剖析导火索燃烧时的透火原因几次全国工业导火索质量评比会上，发现少数单位的产品有不同程度的透火现象。工业导火索国家标准ＧＢ９１０８－８８第４．３．３条规定：“导火索在燃烧时不允许有断火、透火、外壳燃烧及爆声．”因此必须找出透火原因，采取相应的措施，提高...

基于激光距离选通成像的透火透烟侦察技术

针对大火浓烟环境下能见度极低而造成消防员搜救、施救困难的现状,提出了基于激光距离选通成像的火场透火透烟侦察技术,开展了木垛火、正庚烷火透火实体试验和密闭空间透烟试验,可实现纵深1.5 m火焰的穿透、浓烟环境下能见度提升3倍,解决了目前由于表/界面反射、背向散射严重而无法穿透火焰浓烟的难题。基于试验结果,探讨了距离选通成像在消防可视化侦察及搜救中的应用前景,进一步明确了该研究领域未来的发展方向。基于激光距离选通成像技术研发的火场侦察搜救装备,可为消防救援人员开展建筑受限空间火灾的内攻救援及撤离提供“透视眼”,有望切实提高大火浓烟以及夜间环境下初战控火、快速内攻及人员搜救能力。

药火透疗治疗膝关节退行性骨关节病36例

目的:观察民间疗法“药火透疗”治疗膝关节退行性骨关节病的临床疗效。方法:71名患者随机分为治疗组(36例)和对照组(35例)。治疗组采用“药火透疗”方法,并与中药熏洗疗法作对照。结果:治疗组有效率94.44%,对照组88.57%;治疗组痊愈率66.67%,对照组37.14%。治疗组明显优于对照组。结论:民间疗法“药火透疗”具有操作简单、省时省力的优点,治疗膝关节退行性骨关节病疗效肯定。

Meteorites Penetration into the Dense Layers of the Earth＇s Atmosphere： Physical Mechanism behind the Explosive Phenomena

This discussion paper is an attempt to consider new ideas about the nature of explosive phenomena of the meteorite bodies in the Earth＇s atmosphere. Authors attract approaches, based on the concepts of physics of combustion, explosion and detonation in order to explain the explosive collapse of the meteorite. Authors believe that the meteorite explosion may be the result of gas-detonation mechanism of overheated meteoric bodies explosive boiling-up （the ＂vapor explosion＂）, accompanied by the formation of a supersonic front of shock wave. The considered hypothesis regarding the role of the ＂vapor explosion＂ in geological disasters can be used to explain the mechanisms of explosive phenomena in Volcanology： （1） With respect to the description of nature of phreatic eruptions; （2） for interpretation of dynamic regularities of the volcano crater opening and the subsequent shock-wave emission of steam-gas ＂fountain＂ to a height of several kilometers with fragments of magma and rocks as a result of the ＂vapor explosion＂ of overheated magma mass under the dome of the volcano.

Experimental Study on the Use of Trass as a Supplementary Cementitious Material in Pervious Concrete

Abstract： The purpose of this paper is to evaluate the suitability of using trass as a supplementary cementing material in pervious concrete. OPC （Ordinary Portland Cement） was replaced in the concrete mix by 15%, 25% and 35% weight percentages and the results were compared with reference mixtures with 100% Portland cement. The variables in this study were trass content, aggregate size and water to cement ratio. Sixteen eases of concrete mixtures were tested to study physical and mechanical properties of hardened concrete, including porosity, permeability, compressive strength, splitting-tensile strength and flexural strength at various ages. Results indicated that mechanical properties of the pervious concrete marginally decreased with the increased content of trass when compared to the reference mixtures. However, at later ages the differences were insignificant.

Effect of complex reinforcing-reducing manipulation on lower limb motion and balance disorder in patients with subacute combined degeneration of the spinal cord

Objective：To observe the effect of complex reinforcing [Shao Shan Huo （Mountain-burning Fire）] and reducing [Tou Tian Liang （Heaven-penetrating Cooling）] manipulations on motion and balance of the lower limbs in patients with subacute combined degeneration of the spinal cord （SCD）. Methods：A total of 100 SCD cases were randomly allocated into an observation group and a control group by their visit sequence, 50 cases in each group. On the basis of Western medical treatment, cases in the observation group were also treated with acupuncture therapy plus complex reinforcing-reducing manipulation; whereas cases in the control group were only treated with the same Western medical treatment as those in the observation group. Before and 2 months after treatment, kinematic parameters including muscle force, muscle tone and range of motion of the hip and knee joints were measured. In addition, balancing parameters including the path length of center of pressure （COP）, peripheral area, COP path length per unit area and rectangular area were also measured before and after treatment. Results：After treatment, there were statistical intra-group differences in COP path length, peripheral area, COP path length per unit area, left-right offset, rectangular area, coefficient of stability and coefficient of weight distribution （P〈0.01）. There were statistical inter-group differences in muscle force, muscle tone and range of motion of hip and knee joints （P〈0.01）. The total effective rate was 83.3% in the observation group, versus 60.0% in the control group, showing a statistical difference （P〈0.05）. Conclusion：Complex reinforcing-reducing manipulations can improve the lower limb motion and balance in SCD patients.

Introduction to LU Shou-yan's Acupuncture Theory

LU considers that correct manipulations are essential to the therapeutic effect. Reinforcing and reducing manipulations are especially important for zang-fu problems. He summarized the typical reinforcing-reducing manipulations： mountain-fire burning and heaven-penetrating cooling method as follows.

Selective and localized laser annealing effect for high- performance flexible multilayer MoS2 thin-film transistors

We report the use of ultra-short, pulsed-laser annealed Ti/Au contacts to enhance the performance of multilayer MoS2 field effect transistors （FETs） on flexible plastic substrates without thermal damage. An analysis of the temperature distribution, based on finite difference methods, enabled understanding of the compatibility of our picosecond laser annealing for flexible poly（ethylene naphthalate） （PEN） substrates with low thermal budget （〈 200 ℃）. The reduced contact resistance after laser annealing provided a significant improvement in transistor performance including higher peak field-effect mobility （from 24.84 to 44.84 cm2-V-l.s-1）, increased output resistance （0.42 MΩ at Vgs- Vth = 20 V, a three-fold increase）, a six-fold increase in the self-gain, and decreased sub- threshold swing. Transmission electron microscopy analysis and current-voltage measurements suggested that the reduced contact resistance resulted from the decrease of Schottky barrier width at the MoS2-metal junction. These results demonstrate that selective contact laser annealing is an attractive technology for fabricating low-resistivity metal-semiconductor junctions, providing important implications for the application of high-performance two-dimensional semicon- ductor FETs in flexible electronics.

Effect of complex reinforcing-reducing manipulations on hip and knee flexion and extension angles after surgery of gluteus maximus contracture

Objective： To observe the effect of complex reinforcing-reducing manipulations of acupuncture on flexion and extension angles of hip and knee in patients after surgical treatment of gluteus maximus contracture. 〈br〉 Methods： A total of 66 cases following surgery of gluteus maximus contracture were randomly allocated into an observation group and a control group by the random digits table, 33 in each group. In addition to basic treatment, cases in the observation group were treated with reducing manipulation [Tou T ian Liang （Heaven-penetrating Cooling）] on Zhibian （BL 54）, Huantiao （GB 30） and Juliao （GB 29） on the affected side and reinforcing manipulation [Shao Shan Huo （Mountain-burning Fire）] on Biguan （ST 31）, Futu （ST 32）, Zusanli （ST 36）, Fenglong （ST 40）, Xuehai （SP 10）, Diji （SP 8） and Yanglingquan （GB 34）. Patients in the control group only received the same basic treatment as the observation group. The treatment was done once a day, 30 d for a course and a 1-week interval between two courses. Then the flexion and extension angles of hip and knee were evaluated using the Lokomat full automatic robot gait evaluation system after 3 courses of treatment. 〈br〉 Results：There were intra-group statistical differences in hip flexion angle on foot followed （HFA-FF）, the maximum of hip flexion angle （MAX-HFA）, the maximum of hip extension angle （MAX-HEA）, knee flexion angle on foot followed （KFA-FF）, the maximum of knee flexion angle on stance phase （MAX-KFA-TP） and the maximum of knee flexion angle on swing phase （MAX-KFA-WP） in the observation group and in HFA-FF, MAX-HEA and KFA-FF in the control group （P＆lt;0.05）. There were between-group statistical differences in HFA-FF, MAX-HFA, MAX-HEA, KFA-FF and MAX-KFA-TP （P＆lt;0.05）. 〈br〉 Conclusion： The complex reinforcing-reducing manipulations of acupuncture can effectively improve the hip/knee functions following surgery of gluteus maximus contracture.

Effect of cooling rate on β→α transformation during quenching of a Zr-0.85Sn-0.4Nb-0.4Fe-0.1Cr-0.05Cu alloy

The effect of β→α cooling rate during quenching on a new Zr-Sn-Nb-Fe-Cr-Cu alloy is reported.The microstructure evolution is well characterized by electron channeling contrast(ECC) imaging and transmission electron microscopy(TEM) techniques.The results show that specimens cooled by water,liquid nitrogen,air and furnace from β-phase present martensitic,coarse basket-weave,parallel-plate and lenticular structure,respectively.Residual β phase is detected by performing electron diffraction and composition analysis in the furnace cooled specimen.Micro hardness values of specimens decrease while the width of α laths increase with the cooling rate decreasing.The preliminarily established quantitative relationship among the cooling rate,microstructure and mechanical properties will shed light on the microstructure control and property optimization.