Test research on IR radiation characteristics control of space target using cryogenic vacuum multilayer insulation film structure

In order to achieve the objective of controlling IR radiation characteristics of space target,we design multilayer insulation film structure to cover the target.In space environment the structure comes to cryogenic vacuum multilayer insulation film structure.It can quickly lower the surface temperature of space target,approaching to the ultra-low temperature of the space environment.A vacuum simulation verification test was designed and performed.Through the analysis of test results,we can see that the surface temperature of space target covered by the structure changes with the ambient temperature,having no direct relationship with internal temperature of the target.Therefore,the designed cryogenic vacuum multilayer insulation film structure has excellent IR radiation control performance.It can reduce the target’s IR radiation intensity so as to reduce the probability of detection by IR detectors.

Was Polchinski Wrong? Colombeau Distributional Rindler Space-Time with Distributional Levi-CivitàConnection Induced Vacuum Dominance. Unruh Effect Revisited

The vacuum energy density of free scalar quantum field in a Rindler distributional space-time with distributional Levi-Cività connection is considered. It has been widely believed that, except in very extreme situations, the influence of acceleration on quantum fields should amount to just small, sub-dominant contributions. Here we argue that this belief is wrong by showing that in a Rindler distributional background space-time with distributional Levi-Cività connection the vacuum energy of free quantum fields is forced, by the very same background distributional space-time such a Rindler distributional background space-time, to become dominant over any classical energy density component. This semiclassical gravity effect finds its roots in the singular behavior of quantum fields on a Rindler distributional space-times with distributional Levi-Cività connection. In particular we obtain that the vacuum fluctuations have a singular behavior at a Rindler horizon . Therefore sufficiently strongly accelerated observer burns up near the Rindler horizon. Thus Polchinski’s account doesn’t violate the Einstein equivalence principle.

A Realistic Interpretation of Quantum Wavefunctions as Temperature Dependent Vacuum Polarization Waves

We discuss in this paper a novel interpretation of Born rule as an approximated thermodynamic law which emerges from the interaction of a quantum system with a non-stationary thermal bath associated to vacuum fluctuations induced by external environment radiation. In particular we assume that vacuum polarization is a real non relativistic phenomena caused by hidden vacuum charge oscillations which diffuses heat energy in a dispersive and dissipative dielectric medium with a temperature dependent speed of propagation. We propose a model which couples vacuum wavefunctions to vacuum charge fluctuations and we deduce a temperature dependent running fine structure constant function proportional, at first approximation, to the squared of the effective electron charge and compatible with known experimental data. We interpret the vacuum symmetry breaking energy fluctuations induced in scattering experiments of particle physics and in laser assisted nuclear reactions as thermal quasi-monochromatic beams produced by the decay of hidden non equilibrium massive photons propagating with a variable light speed. We suggest, exploiting an old analogy between plasmons and pseudo Goldstone bosons, to interpret heat diffusion of this non relativistic polarized vacuum as a real De Broglie electromagnetic scalar wave associated to the radiation emitted by the hidden massive photons with acceleration proportional to vacuum Unruh like temperature. We predict a temperature dependent deviation from Coulomb law and a generalized dispersive law of these hidden unstable photons that could be revealed as not stationary coloured noise in experiments on anomalous heat diffusions associated to the decay of unstable accelerated pairs produced in nuclear physics experiments. We discuss then how our proposal of a temperature dependent non relativistic vacuum polarization might be applied to deduce a dynamic generalization of Born rule based on a realistic interpretation of quantum wavefunctions as averaged electromagnetic waves of hidden massive photons. Finally we suggest to test our time asymmetric model looking for very fast oscillating polarization thermal waves emitted during the not instantaneous wavefunction collapse and revealed as not stationary bulk heating effects in experiments on accelerated conductors and nanoconductors.

Modeling and Simulation of a Bonding Process for Space Solar Cells

A bonding process for space solar cells implemented by an automated coating and bonding system was theoretically investigated for future parametric studies to achieve better bonding quality. First, the mechanical properties of silicone adhesive and the vacuum suction cup were experimentally analyzed. Based on the constitutive relationship of four parts in the bonding process, the dynamic bonding process was modeled systematically, and numerically simulated by a commercial finite element analysis code, Adina. The final bonding edge-alignment error and the thickness and uniformity of the adhesive layer were obtained from simulation and validated by experiments. A simulation platform was created for predicting the final bonding quality via adjusting bonding parameters when dimensions of the solar cells and adhesive were changed.

高真空环境模拟卧式超长综合试验平台

文章设计了一套高真空环境模拟卧式超长综合试验平台,包括真空腔体、抽真空系统、热模拟系统、冷却水循环系统、控制及数据采集系统以及其他辅助保证系统等。该环境模拟系统主要是为全系统模拟真空环境试验提供条件保障,满足试验过程中关键技术指标的验证要求以及关键设备可以在清晰成像距离范围内实现对目标运动轨迹的标定,为后续项目研发和改进提供技术和测试数据支撑。

A New Interpretation of the Higgs Vacuum Potential Energy Based on a Planckion Composite Model for the Higgs

We present a new interpretation of the Higgs field as a composite particle made up of a positive, with, a negative mass Planck particle. According to the Winterberg hypothesis, space, i.e., the vacuum, consists of both positive and negative physical massive particles, which he called planckions, interacting through strong superfluid forces. In our composite model for the Higgs boson, there is an intrinsic length scale associated with the vacuum, different from the one introduced by Winterberg, where, when the vacuum is in a perfectly balanced state, the number density of positive Planck particles equals the number density of negative Planck particles. Due to the mass compensating effect, the vacuum thus appears massless, chargeless, without pressure, energy density, or entropy. However, a situation can arise where there is an effective mass density imbalance due to the two species of Planck particle not matching in terms of populations, within their respective excited energy states. This does not require the physical addition or removal of either positive or negative Planck particles, within a given region of space, as originally thought. Ordinary matter, dark matter, and dark energy can thus be given a new interpretation as residual vacuum energies within the context of a greater vacuum, where the populations of the positive and negative energy states exactly balance. In the present epoch, it is estimated that the dark energy number density imbalance amounts to, , per cubic meter, when cosmic distance scales in excess of, 100 Mpc, are considered. Compared to a strictly balanced vacuum, where we estimate that the positive, and the negative Planck number density, is of the order, 7.85E54 particles per cubic meter, the above is a very small perturbation. This slight imbalance, we argue, would dramatically alleviate, if not altogether eliminate, the long standing cosmological constant problem.

Scaling Behavior for the Susceptibility of the Vacuum

Using the two-component superfluid model of Winterberg for space, two models for the susceptibility of the cosmic vacuum as a function of the cosmic scale parameter, a, are presented. We also consider the possibility that Newton’s constant can scale, i.e., G-1=G-1(a), to form the most general scaling laws for polarization of the vacuum. The positive and negative values for the Planckion mass, which form the basis of the Winterberg model, are inextricably linked to the value of G, and as such, both G and Planck mass are intrinsic properties of the vacuum. Scaling laws for the non-local, smeared, cosmic susceptibility, , the cosmic polarization, , the cosmic macroscopic gravitational field, , and the cosmic gravitational field mass density, , are worked out, with specific examples. At the end of recombination, i.e., the era of last scattering, using the polarization to explain dark matter, and the gravitational field mass density to explain dark energy, we find that, . While this is an unconventional assignment, differing from the ΛCDM model, we believe this is correct, as localized dark matter (LDM) contributions can be much higher in this epoch than cosmic smeared values for susceptibility. All density parameter assignments in Friedmanns’ equation are cosmic averages, valid for distance scales in excess of 100 Mpc in the current epoch. We also evaluate the transition from ordinary matter dominance, to dark matter dominance, for the cosmos as a whole. We obtain for the transition points, z=1.66, for susceptibility model I, and, z=2.53 , for susceptibility model II.

热解碳泡沫材料吸波机理研究

为避开高分子材料作为基体,进一步拓展碳系吸波材料在空间环境或仿空间环境中的应用,本工作提出了预制体法结合热解工艺制备热解碳泡沫吸波材料的新思路,采取从400℃到1 500℃的不同目标热解温度制备了一系列热解碳泡沫材料,通过对不同温度热解碳泡沫材料的傅里叶红外光谱、热重-差热、X射线衍射和电化学分析,明确了热解碳泡沫为半导体材料,其热解残余基团无序区造成的阈值效应、共轭效应和位阻效应抑制π电子离域移动,控制载流子浓度,进而影响热解碳泡沫材料的电磁性能。对不同温度热解碳泡沫材料电磁参数的测试表明,600~700℃热解的碳泡沫材料的介电常数实部和虚部大小适合,适合作吸波材料。

詹姆斯·韦布空间望远镜试验验证方法述评

詹姆斯·韦布空间望远镜(JWST)是目前世界上最大的空间望远镜,也是继哈勃空间望远镜之后的又一旗舰级望远镜任务,该望远镜装备有须在深低温环境下运行的大尺寸和高精度光学器件,常规试验方法及设备不能满足其研制需求。为平衡研制周期、研制成本以及任务整体可靠性,JWST采用了不同于传统航天器的试验验证方法,即集成模型仿真验证与试验验证相结合的方法。文章对JWST的分系统级、系统级试验验证方法进行调研分析,并简述其地面试验系统设备的改造情况,以期为我国未来大型航天器试验技术的发展提供参考。

On the Cosmic Evolution of the Quantum Vacuum Using Two Variable G Models and Winterberg’s Thesis

We work within a Winterberg framework where space, i.e., the vacuum, consists of a two component superfluid/super-solid made up of a vast assembly (sea) of positive and negative mass Planck particles, called planckions. These material particles interact indirectly, and have very strong restoring forces keeping them a finite distance apart from each other within their respective species. Because of their mass compensating effect, the vacuum appears massless, charge-less, without pressure, net energy density or entropy. In addition, we consider two varying G models, where G, is Newton’s constant, and G-1, increases with an increase in cosmological time. We argue that there are at least two competing models for the quantum vacuum within such a framework. The first follows a strict extension of Winterberg’s model. This leads to nonsensible results, if G increases, going back in cosmological time, as the length scale inherent in such a model will not scale properly. The second model introduces a different length scale, which does scale properly, but keeps the mass of the Planck particle as, ± the Planck mass. Moreover we establish a connection between ordinary matter, dark matter, and dark energy, where all three mass densities within the Friedman equation must be interpreted as residual vacuum energies, which only surface, once aggregate matter has formed, at relatively low CMB temperatures. The symmetry of the vacuum will be shown to be broken, because of the different scaling laws, beginning with the formation of elementary particles. Much like waves on an ocean where positive and negative planckion mass densities effectively cancel each other out and form a zero vacuum energy density/zero vacuum pressure surface, these positive mass densities are very small perturbations (anomalies) about the mean. This greatly alleviates, i.e., minimizes the cosmological constant problem, a long standing problem associated with the vacuum.

负压封闭引流在颌面颈部间隙感染致下行性坏死性纵隔炎治疗中的应用效果评价

目的:探讨负压封闭引流(vacuum sealing drainage,VSD)在颌面颈部间隙感染致下行性坏死性纵隔炎(descending necrotizing mediastinitis,DNM)中的临床应用效果。方法:回顾2014年7月—2023年7月就诊于新疆医科大学附属口腔医院采用负压封闭引流术治疗的53例DNM患者的临床资料,对治疗效果进行总结分析。采用SPSS 26.0软件包对数据进行统计分析。结果:53例患者中,3例放弃治疗,1例死亡,其余患者均治愈出院。平均住院天数(25.3±13.75)d,VSD平均放置时间(16.15±8.22)d,ICU平均监护时间(12.02±11.56)d,平均更换VSD次数(1.57±1.32)次。患有糖尿病患者与血糖正常患者的住院天数、ICU监护时间、VSD使用时长、抗生素使用天数、住院总费用,入院时中性粒细胞数与淋巴细胞数比值(N/L值)、白介素6(IL-6)及D-二聚体(D-D)值均有显著差异。结论:负压封闭引流术在颌面颈部间隙感染致下行性纵隔炎的治疗中创伤小,能促进炎症吸收,减轻患者病程中换药的痛苦,对于感染至前下纵隔及全纵隔的病例,联合胸腔闭式引流或纵隔切开引流,效果肯定,具有一定的临床应用价值。

低真空管道磁浮列车交会激波流场特性分析

为了解决管道列车高速运行时产生的激波等气动效应问题,通过建立三维仿真模型,针对不同阻塞比、线间距和列车外形,基于DES湍流模型,开展非稳态数值模拟研究,分析列车在低真空管道内交会时的激波流场结构、管道壁面压力、列车表面压力。研究结果表明:随阻塞比的增大,列车前端壅塞长度增加,且正压区域压力增大,激波反射更加剧烈,尾流激波反射强度增大,激波串长度加长;阻塞比增大有助于增大激波和膨胀波的入射角,从而增大激波和膨胀波的反射次数。随线间距的增大,管道内压力波动幅度相对增大,但改变线间距对管道内激波流场结构、管道壁面压力、列车表面压力的影响不大。列车头部压力和尾部激波强度与流线型长度存在一定的关系,随着列车流线型长度的增加,列车前端壅塞长度缩短,车头前端高压区壅塞强度和车尾末端尾流区域激波反射强度均减小。

负压封闭引流技术在老年颌面部间隙感染患者中的应用

目的观察负压封闭引流技术(VSD)在老年颌面部间隙感染患者中的应用效果。方法回顾性收集2019年9月至2022年10月就诊于郑州大学第一附属医院的124例老年颌面部间隙感染患者,根据引流方式的不同,将患者分为对照组(传统切开引流术,62例)和观察组(VSD,62例)。对比两组患者住院时间、术后疼痛程度、换药次数、白细胞计数、中性粒细胞计数、C反应蛋白(CRP)、血清降钙素原(PCT)、瘢痕长度、张口度、切口愈合时间、并发症、转归、疗效以及复发情况等,评价治疗效果。结果观察组患者的住院时间、换药次数、白细胞计数、中性粒细胞计数、CRP、PCT、瘢痕长度、张口度、切口愈合时间以及并发症、疗效以及复发情况均优于对照组(P<0.05)。两组出院及死亡情况差异无统计学意义(P>0.05)。结论与传统切开引流术相比,VSD技术对于老年颌面部间隙感染患者疗效更好,有利于促进患者切口愈合,减少患者疼痛,减少住院时间。

简析软基处理中塑料排水板间距对工程造价的影响

随着排水板间距的变化,真空预压法软基加固工程的造价也会发生变化,其中塑料排水板材料及施工费用以及抽真空费用占据了较大比例。塑料排水板间距对造价影响较大,针对这个问题对真空预压软基加固方法进行分析,重点对排水板间距进行了研究,在使用要求、地质参数、塑料排水板材料及施工费用、抽真空费用已知的前提下,采用定额计价的方法,分别对不同排水板间距条件下加固费用进行比较,以求得最经济设计方案下的间距取值。

固定床渣油加氢技术及渣油高效转化技术应用

固定床渣油加氢技术一般不加工100%减压渣油,其装置混合原料中减压渣油质量分数一般不高于65%。A固定床渣油加氢装置6个周期运行结果表明:原料中减压渣油比例越高,装置运行周期越短。B固定床渣油加氢装置体积空速为0.20 h^(-1),若体积空速降低至0.15、0.10 h^(-1),反应器压力降预计分别增加至2.3、3.4 MPa。A固定床渣油加氢装置加氢重油产率高达93.25%,520℃以上馏分转化率仅为25.38%。沸腾床渣油加氢技术及浆态床渣油加氢技术可以加工100%减压渣油。C沸腾床渣油加氢装置和D浆态床渣油加氢装置反应器压力降稳定,其中D装置反应器压力降仅为0.42 MPa。典型沸腾床渣油加氢技术和浆态床渣油加氢技术的转化率可达85.87%和91.49%。

A Creation Model from the Gell-Mann Standard Model to the Creation of Bio Cells: Based on the Assumption of Homogeneous 5D Space-Time Universe

In this paper, we briefly go over the homogeneous 5D model field theory: from the 5D space-time inception, to its quantum field solutions given in terms of Higgs vacuum, filled with magnetic monopole bose fields of all energies. Then through the space dimension reduction projections, the Gell-Mann standard model was obtained as well as a quantum to Classical connection was made via introducing Bose distribution to the monopoles to obtain the Perelman entropy and Ricci Flow mappings. This provided us a picture to the creation of Astronomical objects, from galaxies to stars and planets. This method of splitting the monopole energy into ranges is extended to show that below the basic rest mass range of the electron and Quark, it still can be applied to explaining for the creation of the chemical elements periodic table. But perhaps the most interesting is in the lowest hundreds of Hz energy range, obtained from yet another 3 fold space symmetry breaking, into 2D × 1D, producing bio nitrogenous bases composed of 3 Carbon 12 in hexagon structures, due to preservation of the 1D monopole standing waves of this low frequencies. From that by imposing gauge changes the monopole states into DNA spectra. Since such spectra states retain the DLRO, it induces formation of charge carriers periodicity in a spherical bio cell.. It was then argued that due to cell’s surface proteins, the structure must contain partial filled VB, with “p” state hole density, and empty CB, separated from VB by a positive band gap. Such band structures resemble known HTC Cuprate ceramics. Since the HTC goes through a Superconductivity transition via the simultaneous bose exciton condensation, providing a Coulomb pressure, which reduces the band gap substantially, and induces the ODLRO transition of the hole density. The same obviously applies to the bio cells. Because of the near continuous exciton levels generated, a matching to the DNA spectra then can always occur by selective choices of proteins on the cell surface. Judging from a numerical study, we did years ago on YBCO, with doping. We found with a large enough VB hole density, the exciton induced superconducting gap can easily lead to Tc in the room temperature range. In fact by EMF excitation can increase the exciton pressure and trigger the ODLRO transition Tc upward. In fact, numerical results then suggest there do exist coherent EMF spectra from three key elements: Water, Carbon and Hydrogen, together with Oxygen, as studied over the years by numerous people, starting from Schrödinger to most recently Geesink.

真空电弧重熔GH984G合金多物理场耦合行为的数值模拟

利用Fluent软件建立模型,模拟研究了2.8 kA和3.3 kA电流条件对真空电弧重熔过程中多物理场耦合行为的影响,并对铸锭枝晶间距进行模拟和实验测定研究.结果表明:随着时间的增加,铸锭逐渐凝固,同时熔池变深;随着电流的增大,电流密度、磁场强度、焦耳热、洛伦兹力、流场和温度场等数值均增大,熔池也变深;一次枝晶间距和二次枝晶间距从铸锭中心到铸锭边缘不断减小,并且电流的增大使同一位置的一次枝晶间距和二次枝晶间距均增大.

封闭负压引流技术治疗口腔颌面间隙感染的临床应用

目的评价封闭负压引流(VSD)技术持续负压引流并生理盐水持续冲洗治疗口腔颌面间隙感染的疗效。方法对116例颌面间隙感染病例进行回顾性分析,收集患者临床资料,比较常规手术切开引流(传统治疗组,58例)和手术切开VSD(VSD组,58例)这2种治疗方法的治疗效果。结果 VSD组患者的住院时间、白细胞计数、瘢痕长度、换药次数、疼痛程度均低于传统治疗组,张口改善度优于传统治疗组(P<0.05)。结论封闭负压引流技术是治疗口腔颌面间隙感染的更为有效的一种方法。

空间机械润滑研究的发展现状

根据研究工作积累并结合文献资料调研，对空间机械润滑研究的发展现状作了综合、归纳、分析与评述．首先，简要阐明了空间机械所经历的地面水蒸汽和氧，发射过程中的强烈振动和冲击过载，太空高真空和原子氧及强辐射等对空间机械摩擦学系统的影响．接着，根据空间技术发展的需要，提出并讨论了急等解决的空间机械摩擦副降低摩擦和提高稳定性，间歇操作状态下的润滑和防止冷焊，以及极端环境中的润滑和延长使用寿命等问题；比较系统地阐述了现有空间润滑材料的特性和存在的问题及其研究动态，指出这类材料总的发展趋势是多元复合或合金化和多层膜．针对空间机械润滑研究的现状，明确强调摩擦学材料表面及次表面层的优化处理，提高复合材料中各组元间的界面结合强度，改进摩擦学设计和模拟试验等。

润滑材料的空间环境效应

卫星、人造飞船、空间实验室、空间站等航天器涉及诸多的机械运动部件,润滑材料和润滑技术是空间机械运动部件长期可靠工作的关键,对于降低机械运动部件的摩擦磨损、延长其工作寿命发挥着重要作用。在空间环境条件下,润滑材料可能会面临高真空、极端温度、温度交变、原子氧、紫外/质子/电子辐射、微陨石及空间碎片等苛刻环境因素,上述空间环境因素可能会引起润滑材料结构、组分的变化及其性能的堕化,从而导致机械运动部件的润滑失效。主要综述了目前常用的空间润滑材料及各种空间环境因素对润滑材料的影响,着重探讨了真空、极端温度及原子氧辐照对润滑材料的影响,并对空间润滑材料的研究进行了展望。