双阴电连接器自动装配机器人控制方法研究

双阴电连接器为雷达产品的关键器件,采用传统人工装配方式效率低,一致性较差,采用自动装配机器人系统进行装配可有效提高装配效率和质量。文中从电连接器装配的工艺需求出发,结合电连接器的结构特征,梳理了自动装配方式下详细的控制流程架构。通过对装配对象特征提取逻辑和定位算法的设计,有效实现了装配位置的精确引导,并通过对机器人装配关键运动点的拆解分析,得出了一套完整的自动装配控制方法。基于该方法设计的系统在实际应用中稳定、可靠,满足军工产品生产装配要求。

磁刺激、电刺激联合外阴电极片刺激治疗阴道松弛的临床疗效

目的:研究磁刺激、电刺激联合外阴电极片刺激治疗阴道松弛的临床疗效。方法:选取石门县人民医院2021年1~12月收治的100例阴道松弛患者作为研究对象,按照随机数字表法分为对照组与研究组,各50例。对照组采用磁刺激、电刺激联合治疗,研究组采用磁刺激、电刺激联合外阴电极片刺激治疗,两组均治疗6~10周。比较两组治疗前、治疗6~10周后阴道松弛程度、阴道健康情况[阴道健康指数(VHIS)评分]、性功能[女性性功能质量量表(FSFI)评分]、相关细胞因子[胰岛素样生长因子-1(IGF-1)、转化生长因子-β1(TGF-β1)水平]。结果:研究组阴道松弛程度显著优于对照组,差异有统计学意义(P<0.05);治疗6~10周后,两组阴道黏膜上皮、阴道湿润度、阴道黏膜弹性、性唤起、性交疼痛、性高潮、阴道润滑度、性兴趣、性满意度得分及血清IGF-1、TGF-β1水平均显著升高,且研究组高于对照组(P<0.05)。结论:磁刺激、电刺激联合外阴电极片刺激治疗阴道松弛疗效确切,可有效改善松弛程度,提升性功能,调节相关细胞因子水平。

解开阴电和阳电分离的争论迷雾

人们从传统辩证法的观点出发,历来认为;阴电和阳电是一对矛盾,没有阴电就没有阳电,没有阳电就没有阴电,两者是不可分离的。然而,不讲情面的物理学家在实验中,不仅把阴电和阳电分离开来,而且既制造出阴电池又制造出阳电池。这一事实立即引起一场世界性的争论。西方某些自然科学家据此宣称:“

生物高压阴电位经穴治疗糖尿病20例疗效探讨

生物高压阴电位经穴治疗糖尿病２０例疗效探讨天津医科大学总医院康复科余玉兰天津医科大学代谢病防治中心熊文糖尿病是一种终身性疾病，其并发症可波及全身各系统，严重威胁着人民的健康，患者每天应用药物治疗有的仍不能维持正常代谢，并经常反复发生酮症，引起并发症。...

高压阴电位治疗在康复医学中的应用

本文报告了我院应用近年来发明的能补给人体阴离子的装置－高压阴电位治疗仪在临床中的应用情况，阴离子能促进新陈代谢，能赋活全身细胞和细胞，增进健康，是一种划时代的新疗法。

阳电和阴电的矛盾

“合二而一”論者否认矛盾的斗爭,否认矛盾的轉化,統一体的必然分解。他們为着替自己辯护,把一切事物的矛盾双方都說成只是不可分离地联系着,然后宣称任何事物都是“合二而一”的。他們的“合二而一”論就是建立在歪曲了的“事实”基础上。他們有的說:阳电和阴电是“合二而一”的,还有的說:电运动发生质变是阳电和阴电的“合二而一”。有人还举例說:“阴电和阳电‘合二而一’就打雷。”但是科学事实証明,这些說法是毫无根据的。 (一)带阳电物体和带阴电物体間有着相互作用力,这种相互作用力一分为二,分为带阳电物体对带阴电物体的作用力和相反的带阴电物体对带阳电物体的作用力。这两个力大小相等,方向相反,作用在不同物体上,相互对立,是不能“合二而一”的。相对靜止的带电体周围产生电場,使带电体間相互作用着靜电力。带电性质相同的带电体間,相互排斥;带电性质相反的带电体間,相互吸引。庫仑定律指出,相互排斥或吸引的力的量,正比于它們带电量的乘积。

Effect of 10% Si addition on cathodic arc evaporated TiAlSiN coatings

The effect of 10% Si （mole fraction） addition on TiAlSiN coatings was studied. Ti0.5Al0.5N, Ti0.5Al0.4Si0.1N and Ti0.55Al0.35Si0.1N coatings were deposited on WC？Co substrates by cathodic arc evaporation. The microstructure and mechanical properties were characterized by X-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS）, scanning electron microscopy （SEM）, nano-indentation measurement and scratch test. The mechanisms of how Si affects the properties and failure modes of TiAlSiN coatings were also discussed. The results show that the addition of 10% Si results in the formation of nc-（Ti,Al,Si）N/a-Si3N4 nano-composite structure. The hardness and toughness of TiAlSiN coatings increase, whereas the coating adhesion strength decreases. Compared with Ti0.55Al0.35Si0.1N coating, Ti0.5Al0.4Si0.1N coating has higher hardness but lower toughness. The dominant failure mode of TiAlN coating is wedging spallation due to low toughness and strong interfacial adhesion. The dominant failure mode of TiAlSiN coatings is buckling spallation due to improved toughness and weakened interfacial adhesion.

Separation and recovery of Cu and As from copper electrolyte through electrowinning and SO_2 reduction

Cu and As were separated and recovered from copper electrolyte by multiple stage electrowinning, reduction with SO2and evaporative crystallization. Experimental results showed that when the current density was 200 A/m2, the electrolyte temperature was 55 °C, the electrolyte circulation rate was about 10 mL/min and the final Cu concentration was higher than 25.88 g/L, the pure copper cathode was recovered. By adjusting the current density to 100 A/m2 and the electrolyte temperature to 65 °C, the removal rate of As was 18.25% when the Cu concentration decreased from 24.69 g/L to 0.42 g/L. After As（V） in Cu-depleted electrolyte was fully reduced to As（Ⅲ） by SO2, the resultant solution was subjected to evaporative crystallization, then As2O3 was produced, and the recovery rate of As was 59.76%. The cathodic polarization curves demonstrated that both Cu2＋ concentration and As（V） affect the limiting current of Cu2＋ deposition.

Electricity generation during wastewater treatment by a microbial fuel cell coupled with constructed wetland

A membrane-less constructed wetland microbial fuel cell （CW-MFC） is constructed and operated under continuous flow with a hydraulic retention time （HRT） of 2 d. Fed with glucose, the CW-MFC generates a stable current density of over 2 A/m3 with a resistor of 1 kΩ and has a chemical oxygen demand （COD） removal efficiency of more than 90% after the startup of 2 to 3 d. A series of systems with the electrode spacings of 10, 20, 30 and 40 cm are compared. It is found that the container with the electrode spacing of 20 cm gains the highest voltage of 560 mV, the highest power density of 0. 149 W/m 3, and the highest Coulombic efficiency of 0.313%. It also has the highest COD removal efficiency of 94. 9%. In addition, the dissolved oxygen （DO） concentrations are observed as the lowest level in the middle of all the CW-MFC reactors. The results show that the more COD is removed, the greater power is generated, and the relatively higher Coulombic efficiency will be achieved. The present study indicates that the CW-MFC process can be used as a cost-effective and environmentally friendly wastewater treatment with simultaneous power generation.

Effects of surface roughness of substrate on properties of Ti/TiN/Zr/ZrN multilayer coatings

Ti/TiN/Zr/ZrN multilayer coatings were deposited on Cr_17Ni_2 steel substrates with different surface roughnesses by vacuum cathodic arc deposition method. Microstructure, micro-hardness, adhesion strength and cross-sectional morphology of the obtained multilayer coatings were investigated. The results show that the Vickers hardness of Ti/TiN/Zr/ZrN multilayer coating, with a film thickness of 11.37 μm, is 29.36 GPa. The erosion and salt spray resistance performance of Cr_17Ni_2 steel substrates can be evidently improved by Ti/TiN/Zr/ZrN multilayer coating. The surface roughness of Cr_17Ni_2 steel substrates plays an important role in determining the mechanical and erosion performances of Ti/TiN/Zr/ZrN multilayer coatings. Overall, a low value of the surface roughness of substrates corresponds to an improved performance of erosion and salt spray resistance of multilayer coatings. The optimized performance of Ti/TiN/Zr/ZrN multilayer coatings can be achieved provided that the surface roughness of Cr_17Ni_2 steel substrates is lower than 0.4μm.

Pseudo-capacitive Behavior of Cobalt Hydroxide/Carbon Nanotubes Composite Prepared by Cathodic Deposition

A novel type of composite electrode based on nmltiwalled carbon nanotubes coated with sheet-like cobalt hydroxide particles was used in supercapacitors. Cobalt hydroxide cathodlcally deposited fiom Co（NO3）O2 solution with carbon nanotubes as matrix exhibited large pseudo-capacitance of 322 F/g in 1 mol/L KOH. To characterize the cobalt hydroxide nanocomposite electrode, a charge-discharge cycling test, cyclic voltammetry, and an impedance test were done. This cobalt hydroxide composite exhibiting excellent pseudo-capacitive behavior （i.c. high reversibility, high specific capacitance, low impedance）, was demonstrated to be a candidate for the application of electrochemical supercapacitors. A combined capacitor consisting of cobalt hydroxide composite as a cathode and activated carbon fiber as an anode was reported. The electrochemical pcrformance of the combined capacitor was characterized by cyclic voltammetry and a dc charge/discharge test. The combined capacitor showed ideal capacitor behavior with an extended operating voltage of 1.4 V. According to the extended operating voltage, the energy density of the combined capacitor at a current density of 100 mA/cm^2 was found to be 11 Wh/kg. The combined capacitor exhibited high-energy density and stable power characteristics,

Ambient electrical conductivity of carbon cathode materials for aluminum reduction cells

The ambient electrical conductivity (AEC) of carbon cathode materials was investigated in respect to their open porosity, crystal structure and graphite content using hydrostatic method, four-probe technique and X-ray diffraction (XRD), respectively. The AEC is proportional to the specific conductivity (σ0) and the exponential of (1?ε) (ε is porosity) by a quasi-uniform formula based on the percolation theory. Theσ0 can reflect the intrinsic conductivity of the carbon cathodes free of pores, and it depends on the mean crystallite size parallel to the layer (002). The exponentn is dependent on the materials nature of the cathode aggregates, while an averaged value, 4.65, can practically work well with 5 types of cathode materials. The calculation ofσ0 can be extended to the graphitic cathodes containing different aggregates using the simple rule of mixture.

In situ investigation of atmospheric corrosion behavior of PCB-ENIG under adsorbed thin electrolyte layer

The effects of relative humidity (RH) on a printed circuit board finished with electroless nickel immersion gold (PCB-ENIG) under an adsorbed thin electrolyte layer (ATEL) were investigated in situ via the measurement of cathodic polarization curves, electrochemical impedance spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy to clearly elaborate the corrosion behavior of PCB-ENIG in the atmospheric environment. Results indicated that the cathodic process of PCB-ENIG under ATEL was dominated by the reduction of dissolved oxygen, corrosion products, and H2O. The cathodic current density of PCB-ENIG increased progressively with increasing RH. Moreover, its cathodic current density in the solution was greater than that under ATEL. This result demonstrated that the diffusion process was not the controlling step during the limiting reduction of cathodic oxygen. When the polarization potentials were located in a more negative region, the cathodic polarization current density gradually decreased under 75% and 85% RH. Notably, the anodic process became the controlling step in the extremely thin liquid film during the remainder of the experiment.

试谈流行的矛盾观的缺陷和新矛盾观的确立

【正】随着马列主义哲学的发展和实践的深化,人们逐渐认识到流行的矛盾观有很大的局限性和缺陷,需要我们去弥补完善,逐步建立一种新的符合客观规律的矛盾观。在这里,笔者就流行的矛盾观的缺陷和新矛盾观的确立谈谈自己的思考。

Electrodeposition of cobalt in double-membrane three-compartment electrolytic reactor

The process parameters were optimized for the electrodeposition of cobalt from cobalt chloride solution in the membrane electrolytic reactor. Effects of parameters such as catholyte composition, current density and temperature on the current efficiency, specific power consumption and quality of deposition were studied. The catholyte was a mixed solution of cobalt chloride, the initial middle electrolyte consisted of diluted hydrochloric acid, and the anolyte was sulfuric acid. An anion exchange membrane separated the catholyte from the middle electrolyte, and a cation exchange membrane separated the anolyte from the middle electrolyte. The results showed that a maximum current efficiency of 97.5% was attained under the optimum experimental condition of an catholyte composition of 80 g/L Co^2＋, 20 g/L H3BO3, 3 g/L NaF and pH of 4, at a cathode current density of 250 A/m2 and a temperature of 50 ℃ HCl could be produced in the middle compartment electrochemically up to 0.45 mol/L.

提高数学运算能力的对策

目前,学生中轻视教学运算、运算能力低下的情况仍然存在.究其原因,除了对数学运算教学存在认识问题之外,主要表现为以下三点:

STUDY ON DIAMOND LIKE CARBON THIN FILM BY FILTERED VACUUM ARC DEPOSITION

Diamond like carbon thin film is successfully deposited on silicon, titanium and stainless steel substrate at low temperature in a filtered vacuum arc deposition system. Arc discharges are established on a graphite cathode in the system with a toroidal macroparticle filter. A cathode activating magnetic field and a filtered magnetic field to collimate the plasma beam are applied. Ion current convected by the plasma beam is measured with a negatively biased probe. It is shown that the magnetic field of the coils located on the plasma duct has a strong influence on cathode spot behavior. Orthogonally the designed experiments are carried out to optimize the deposition parameters of arc stability. Finally, the diamond like carbon thin films are studied by scanning electron microscope (SEM) and Raman spectrum.

Experimental Research of DLC Film Deposited by Filtered Vacuum Arc Evaporation

Diamond like carbon (DLC) films was grown successfully on silicon, titanium and high speed steel (HSS) substrate at low temperature in a filtered vacuum arc deposition system. Arc discharges were established on a graphite cathode in this home built system with a toridal macroparticles filter. Ion current convected by the plasma beam was measured with a negatively biased probe. It was shown that the magnetic field of the coils located on the plasma duct has a strong influence on ion current. Scanning electron microscope (SEM), atomic force microscope (AFM) and Raman spectrum are used to study the DLC films. Tribological behaviors of the deposited film are also studied.

High-Integrated-Photosensitivity Negative-Electron-Affinity GaAs Photocathodes with Multilayer Be-Doping Structures

The effect of changing Be doping concentration in GaAs layer on the integrated photosensitivity for nega- tive-electron-affinity GaAs photocathodes is investigated. Two GaAs samples with the monolayer structure and the muhilayer structure are grown by molecular beam epitaxy. The former has a constant Be concentration of 1 × 10^19 cm^-3, while the latter includes four layers with Be doping concentrations of 1 × 10^19, 7 × 10^18, 4 × 10^18, and 1 × 10^18 cm^-3 from the bottom to the surface. Negative-electron-affinity GaAs photocathodes are fabricated by exciting the sample surfaces with alternating input of Cs and O in the high vacuum system. The spectral response results measured by the on-line spectral response measurement system show that the integrated photosensitivity of the photocathode with the muhilayer structure enhanced by at least 50% as compared to that of the monolayer structure. This attributes to the improvement in the crystal quality and the increase in the surface escape probability. Different stress situations are observed on GaAs samples with monolayer structure and muhilayer structure, respectively.