Synergistic impact of cocatalysts and hole scavenger for promoted photocatalytic H2 evolution in mesoporous TiO2–NiSx hybrid

Photocatalytic solar energy conversion to hydrogen is sustainable and attractive for addressing the global energy and environmental issue. Herein, a novel photocatalytic system (NiS/Ni3S4 cocatalysts modified mesoporous TiO2) with superior photocatalytic hydrogen evolution capability through the synergistic impact of NiS/Ni3S4 (NiSx) cocatalyst and efficient hole scavenger has been demonstrated. The photocatalytic hydrogen evolution of TiO2-NiSx hybrids with the different content of NiSx and upon different organic hole scavengers was both investigated. The hybrid of TiO2 decorated with 3%(mole ratio of Ni^2+) NiSx cocatalyst in methanol solution showed the optimal photocatalytic hydrogen evolution rate of 981.59 μmol h^-1 g^-1 which was about 20 times higher than that of bare mesoporous TiO2. Our results suggested that the boosted hydrogen production performance is attributed to both the improved photoinduced electrons migration between NiS and Ni3S4 in cocatalyst and the high hole captured efficiency by hole scavengers of methanol.

The Counterintuitive Increase of Information Due to Extra Spacetime Dimensions of a Black Hole and Dvoretzky’s Theorem

As per Hawking and Bekenstein’s work on black holes, information resides on the surface and there is a limit on it amounting to a bit for every Planck area. It would seem therefore that extra dimensions would logically lead to a hyper-surface for a black hole and consequently a reduction of the corresponding information density due to the dilution effect of these additional dimensions. The present paper argues that the counterintuitive opposite of the above is what should be expected. This surprising result is a consequence of a well known theorem on measure concentration due to I. Dvoretzky.

The Singularities of Gravitational Fields of Static Thin Loop and Double Spheres Reveal the Impossibility of Singularity Black Holes

In the classical Newtonian mechanics, the gravity fields of static thin loop and double spheres are two simple but foundational problems. However, in the Einstein’s theory of gravity, they are not simple. In fact, we do not know their solutions up to now. Based on the coordinate transformations of the Kerr and the Kerr-Newman solutions of the Einstein’s equation of gravity field with axial symmetry, the gravity fields of static thin loop and double spheres are obtained. The results indicate that, no matter how much the mass and density are, there are singularities at the central point of thin loop and the contact point of double spheres. What is more, the singularities are completely exposed in vacuum. Space near the surfaces of thin loop and spheres are highly curved, although the gravity fields are very weak. These results are inconsistent with practical experience and completely impossible. By reasonable analogy, black holes with singularity in cosmology and astrophysics are something illusive. Caused by the mathematical description of curved space-time, they do not exist in real world actually. If there are black holes in the universe, they can only be the types of the Newtonian black holes without singularities, rather than the Einstein’s singularity black holes. In order to escape the puzzle of singularity thoroughly, the description of gravity should return to the traditional form of dynamics in flat space. The renormalization of gravity and the unified description of four basic interactions may be possible only based on the frame of flat space-time. Otherwise, theses problems can not be solved forever. Physicists should have a clear understanding about this problem.

A Resolution of the Black Hole Information Paradox via Transfinite Set Theory

A black hole is essentially a relativistic as well as a quantum object. Therefore the information paradox of black holes is a consequence of the clash between these two most fundamental theories of modern physics. It is logical to conclude that a resolution of the problem requires some form of a quantum gravity theory. The present work proposes such a resolution using set theory and pointless spacetime geometry.

Refining Black Hole Physics to Obtain Planck’s Constant from Information Shared from Cosmological Cycle to Cycle (Avoiding Super-Radiance)

Padmanabhan elucidated the concept of super radiance in black hole physics which would lead to loss mass of a black hole, and loss of angular momentum due to space-time infall of material into a black hole. As Padmanabhan explained it, to avoid super radiance, and probable break down of black holes, from in fall, one would need in fall material frequency, divided by mass of particles undergoing in fall in the black hole to be greater than the angular velocity of the black hole event horizon in question. We should keep in mind we bring this model up to improve the chance that Penrose’s conformal cyclic cosmology will allow for retention of enough information for preservation of Planck’s constant from cycle to cycle, as a counterpart to what we view as unacceptable reliance upon the LQG quantum bounce and its tetrad structure to preserve memory. In addition, we are presuming that at the time of z = 20 in red shift that there would be roughly about the same order of magnitude of entropy as number of operations in the electro weak era, and that the number of operations in the z = 20 case is close to the entropy at redshift z = 0. Finally, we have changed Λ with the result that after redshift = 20;there is a rapid collapse to the present-day vacuum energy value i.e. by z = 12 the value of the cosmological constant, Λ likely being the same, today, as for what it was when z = 12. And z = 12 is the redshift value about when Galaxies form.

The Reduced Planck＇s Constant, Mach＇s Principle, Cosmic Acceleration and the Black Hole Universe

Based on the Mach＇s principle and the characteristic mass of the present universe, Mo a c3/2GHo, it is noticed that, ＇rate of decrease in the laboratory fine structure ratio＇ is a measure of the cosmic rate of expansion. If the observed laboratory fine structure ratio is a constant, then, independent of the cosmic red shift and CMBR observations, it can be suggested that, at present there is no cosmic acceleration. Obtained value of the present Hubble constant is 70.75 Km/sec/Mpc. If it is true that, rate of decrease in temperature is a measure of cosmic rate of expansion, then from the observed cosmic isotropy it can also be suggested that, at present there is no cosmic acceleration. At present if the characteristic mass of the universe is, Mo = c3/2GHo and if the primordial universe is a natural setting for the creation of black holes and other non-perturbative gravitational entities, it is also possible to assume that throughout its journey, the whole universe is a primordial growing and light speed rotating black hole. At any time, if cot is the angular velocity, then cosmic radius is c/ω1 and cosmic mass is c3/2Gω1 Instead of the Planck mass, initial conditions can be addressed with the Coulomb mass = Mc = √/4xeoG At present, if ω1= H0 the cosmic black hole＇s volume density, observed matter density and the thermal energy density are in geometric series and the geometric ratio is 1 ＋ ln（M0 ＋Mc）.

NeoMinkowskian Cosmological Black Hole, Poincaré’s Gravific Electron and Density of CBR

In the previous paper (JMP 2014) we showed that there exists a NeoMinkowskian Gravitational Expanding Solution of GR (General Relativity) with CC (Cosmological Constant). We prove now that NeoMinkowskian Vacuum (non-baryonic Fluid), with gravitational (first) density (dark energy) and gravitational waves (at light speed), corresponds to the Gravitation Field of a Cosmological Black Hole (CBH). The latter predicts furthermore a basic emission of Radiation (CBR) from Hubble spherical singular Horizon to the inside of CBH (unlike Hawking’s emission) at an initial singular time. Our solution is then compatible with a well-tempered Big Bang and Expanding Universe (Escher’s Figure, see Penrose, 3) but incompatible with inflation. The latter is based on Hypothesis of a so-called Planck’s particle (Lemaitre’s primitive atom) characterized by a so-called Planck length. We prove that we can short-circuit this unstable particle with a stable cosmological Poincaré’s electron with gravific pressure. It is well known that electron is a stranger in usual Minkowskian vacuum (dixit Einstein). The stranger electron can be perfectly integrated in NeoMinkowskian Radiation fluid and then also (with its mass, charge and wavelength) in (second density of) CBR. Everything happens as if the leptonic mass of the electron were induced by our cosmological field. The unexpected cosmological model proposed here is the only one that predicts numerical values of (second) density and temperature of CBR very close to the observed (COBE) values.

What Connects Dark Matter and Black Holes?

Dark matter is a major component of the universe, about six times more abundant than ordinary visible matter. We measure the effects of its mass, but it escapes the telescopes. It has the particularity of emitting no radiation and interacting only by the action of gravity. The main purpose of this article is to try to answer what dark matter is: we conjecture that it is composed of magnetically charged neutrinos, true magnetic monopoles. But that requires a huge conceptual leap: Maxwell’s laws must be inverted and the electric charge becomes a magnetic charge. Asymmetric “reversed” Maxwell’s laws would provide the “dark” magnetic charge that would replace the electric charge. The very form of the Dirac equation, which imposed on ordinary matter that the particle carries an electric charge and obeys the principal properties of the electron, would impose in the dark matter that the “dark” particle obeys the main properties of a neutrino associated with a magnetic charge. The second aim of the article is to show that dark matter is derived from black holes, mainly from active supermassive black holes. This requires a second conceptual leap: the horizon of the black hole undergoes a high temperature and an intense pressure of magnetic fields which cause a blackout and a phase transition (or broken symmetry) when the matter crosses the horizon. The result is a reversal of Maxwell’s laws: a magnetic charge is substituted for the electric charge, and the electric current becomes a tributary of the magnetic current. A third important conceptual leap follows: sterile magnetic neutrinos created inside the black hole would cross the horizon to the outside to constitute dark matter.

From Black Holes to Information Erasure: Uniting Bekenstein’s Bound and Landauer’s Principle

This research aims to integrate Bekenstein’s bound and Landauer’s principle, providing a unified framework to understand the limits of information and energy in physical systems. By combining these principles, we explore the implications for black hole thermodynamics, astrophysics, astronomy, information theory, and the search for new laws of nature. The result includes an estimation of the number of bits stored in a black hole (less than 1.4 × 1030 bits/m3), enhancing our understanding of information storage in extreme gravitational environments. This integration offers valuable insights into the fundamental nature of information and energy, impacting scientific advancements in multiple disciplines.

基于R-S模型的微小井眼钻井连续油管内钻井液流阻计算分析

微小井眼连续油管(CT)滑动钻井技术是一项易于实现钻井信息化、自动化和智能化的高效、低成本、环保的新型钻井技术,有广泛的应用前景,但微小井眼钻井使用的CT内水眼直径小,钻井液的流阻大。针对该问题,运用数值模拟方法,使用R-S模型计算微小井眼钻井在滚筒上和井筒中CT内钻井液流阻,分析微小井眼钻井CT内钻井液流阻与CT内水眼直径、循环流速、CT长度或井深、滚筒直径、钻井液密度等参数的定量变化规律。结果表明:微小井眼CT钻井技术可使用的CT管柱外径为44. 45～73. 03 mm,可使用的钻井液流速为2～3 m/s。该研究结果对于推动微小井眼CT钻井技术在中国的推广使用有一定理论意义。

GaAs中光生重空穴散射的飞秒光谱

采用可调谐飞秒激光光谱技术 ,研究 Ga As中光生重空穴的超快弛豫动力学过程 .测得重空穴的弛豫时间为 1 50 fs,表明空穴的热弛豫由空穴 -空穴散射和空穴吸收光学声子共同决定 .给出光生空穴的空穴 -空穴散射率公式 ,说明价带类 | p〉波函数的各向异性使得低能量空穴的散射率变小 .计算得到的空穴弛豫时间与实验结果较好符合 .

渤海S油田聚合物驱受效井合理井底压力分析

为研究渤海S油田注聚合物阶段油井合理井底压力界限,利用油藏工程方法及数值模拟技术,推导了聚合物驱受效井合理井底压力界限的计算公式,并利用现场数据进行验证。研究结果表明,对于反九点井网条件下的聚合物驱受效井,其合理井底压力界限主要受地层压力、水驱阶段井底压力、注聚合物时机、含水率的影响。井底压力位于合理压力界限内的油井,聚合物驱效果较好。该研究成果为油田提高聚合物驱效果,扩大注聚合物区块提供了理论依据。

基于B/S模式的表层参数信息查询系统应用开发

利用.net开发工具与Oracle数据库技术,研制了基于B/S模式的表层参数信息查询系统。查询结果以表格和图形两种形式显示,图形方式多样化,包括小折射与微测井时距曲线图,低、降速带等厚图与等速图,表层结构横剖面图等。该系统已实现了自1989年以来的表层试验资料的数字化管理。笔者介绍了该查询系统涉及的关键技术和主要内容。

5维Gauss-Bonnet-AdS黑洞的热力学和临界现象

把宇宙学常数理解为压强,利用标准的热力学方法讨论了5维Gauss-Bonnet-Ad S黑洞系统的热力学和临界现象.把Bekenstein-Hawking熵作为黑洞系统的熵,发现在5维球对称的Gauss-Bonnet-Ad S黑洞中存在相变现象.进一步计算了相变点的临界指数,发现他们满足热力学普适标度规律.

S型针阀体喷孔脉冲电解去毛刺试验研究

钻削加工S型针阀体喷孔后,喷孔入口处易产生毛刺。通过分析喷孔位置及毛刺形态,提出一种以锥形电极作为工具阴极的S型针阀体喷孔脉冲电解去毛刺工艺。基于脉冲电解加工中金属/溶液界面双电层充放电理论,对脉宽参数进行理论分析,并对电解液浓度和组分进行试验优化,在18CrNi8为基材的针阀体上进行了脉冲电解去毛刺试验。结果表明:使用锥形工具电极,在1 mol/L的Na NO3水基溶液中添加草酸作为电解液,并将pH值调至3左右,经脉冲电解去毛刺后,S型针阀体喷孔入口处的毛刺可完全去除。

基于B/S的表层试验资料查询系统研制

利用.net开发工具与Oracle数据库技术,研制了基于B/S模式的表层试验资料查询系统。查询结果以表格和图形两种形式显示,图形方式多样化,包括小折射与微测井时距曲线图、低/降速带等厚图与等速图、表层结构横剖面图等。该系统已实现了自1989年以来的表层试验资料的数字化管理。

S型截面不锈钢钢丝成形工艺和模具设计

根据不锈钢材料强度高、硬化严重和S型横截面形状复杂、尺寸小的特点,确定采用两道次辊弯预成形、两道次辊模拉拔、一道次固模精拉的工艺方案,设计S型截面不锈钢钢丝五个道次成形工艺过程的轧辊孔型。此项研究成果对S型截面钢丝有重要的参考价值。

黑洞辐射Dirac场的Plank’s公式

利用量子统计的方法,求出黑洞Dirac场的普朗克公式.利用该公式进一步导出斯忒藩定律、维恩位移定律和黑洞的统计熵.

利用扫描电子显微镜改进GaAs MESFET背面通孔电镀工艺

利用扫描电子显微镜对ＧａＡｓＭＥＳＦＥＴ背面通孔形貌及电镀状况进行了分析，并对电镀工艺进行了改进。给出了大量改善前后的电镜照片图形。

定向钻进技术在S孔地面预注浆施工中的应用

为实现冻-注-凿平行作业,霍尔辛赫煤矿进风立井地面预注浆工程采用全S孔方案。通过分析该井地层条件及注浆钻孔设计,提出了该工程注浆孔钻进技术难点及重点层位。注浆孔施工过程中,采用JDT-5A型陀螺测斜仪测斜,并采用合理的钻具组合及钻进工艺参数,确保了钻孔施工质量。钻注施工结束后,井筒掘砌过程中,工作面剩余涌水量小于4m3/h,注浆堵水效果良好。