The Strange Relationship between the Momentum of a Photon Emitted from an Electron and the Momentum Acquired by the Electron

In quantum mechanics, the energy of a hydrogen atom is minimized when the principal quantum number n is 1. However, the author has previously pointed out that the hydrogen atom has a state where n=0. An electron in the state where n=0has zero rest mass energy. However, a hydrogen atom has an energy level even lower than the n=0state. This is hard to accept from the standpoint of common sense. Thus, the author has previously pointed out that an electron at the energy level where n=0has zero energy because the positive energy mec2and negative energy −mec2cancel each other out. This paper elucidates the strange relationship between the momentum of a photon emitted when a hydrogen atom is formed by an electron with such characteristics, and the momentum acquired by the electron.

A novel binary effective medium model to describe the prepeak stressstrain relationship of combined bodies of rock-like material and rock

Combined bodies of rock-like material and rock are widely encountered in geotechnical engineering,such as tunnels and mines.The existing theoretical models describing the stress-strain relationship of a combined body lack a binary feature.Based on effective medium theory,this paper presents the governing equation of the“elastic modulus”for combined and single bodies under triaxial compressive tests.A binary effective medium model is then established.Based on the compressive experiment of concretegranite combined bodies,the feasibility of determining the stress threshold based on crack axial strain is discussed,and the model is verified.The model is further extended to coal-rock combined bodies of more diverse types,and the variation laws of the compressive mechanical parameters are then discussed.The results show that the fitting accuracy of the model with the experimental curves of the concretegranite combined bodies and various types of coal-rock combined bodies are over 95%.The crack axial strain method can replace the crack volumetric strain method,which clarifies the physical meanings of the model parameters.The variation laws of matrix parameters and crack parameters are discussed in depth and are expected to be more widely used in geotechnical engineering.

基于SpringBoot的客户关系管理系统设计与实现

面对数字化转型的挑战,开发基于B/S架构的客户关系管理系统非常有意义。文章对系统进行需求分析,确定系统的架构和功能模块,并对数据库进行设计。系统应用的前端技术主要包括Vue.js框架以及ECharts等组件库,后端技术主要包括SpringBoot和MySQL。系统实现了用户登录、客户管理、销售管理、数据分析等模块。实践表明该系统能够满足企业日常客户关系管理的需要,有助于提升企业的运营效率。

Critical emancipatory reflection on establishing an equal,trusting relationship among surgery participants in clinical practice in China

Objective: Reflection is considered to be one of the important ways to learn from one's experience, and one should be encouraged to apply the skill of reflection in lifelong learning. The author used the critical emancipatory reflection theory to reflect on a practice issue,which was related to the relationship between doctors and nurses, and tries to become a lifelong reflective practitioner in clinical work.Methods: Smyth's reflective framework, which includes the steps describe, inform, confront, and reconstruct, will be used in this article to help the author to understand the process of reflection and improve the skill of reflection. Utilizing Smyth's reflective framework to reflect on an issue in practice allows the author to break the routine way of thinking and learn from experience, as well as providing a higher quality of service for patients.Results: The theory of emancipatory reflection along with the critical reflection theory will be used to determine the beliefs and values that rule the author's action and derive how these are distinct from what the author is supposed to achieve. Besides, critical emancipatory reflection theory will be used to discover the dominant power structures in clinical practice; symbolic interaction and hegemony will be utilized to discover the factors that prevent the author from achieving the desired goals; socialization theory will be applied to facilitate the author in improving the professional identity.Conclusions: Using the critical emancipatory reflection on the issue in practice helps the author to find out the constraints in practice,bridge the espoused value and enacted value, and thereafter undertake transformative changes in practice. Eventually, the author can improve the skill of critical emancipatory reflection and become a lifelong reflective practitioner, and the quality of clinical practice can be improved as a result.

Relationship between the Brittlement Susceptibility and H Permeation Current for UNS G11180 Steel in 5% NaCl Solution with H_2S

Sulfide stress corrosion cracking (SSCC) behaviour of UNS G11180 steel in 5% NaCl solution with H2S was studied by slow strain rate tensile test (SSRT), SEM and electrochemical hydro gen permeation technique. The results reveal different cracking mechanism and H permeation current (IH) through UNS G11180 steel plate in different concentration of H2S solution. The susceptibility to SSCC of UNS G11180 Steel in 5% NaCl solution with H2S was evaluated by the permeation current(IH, μA), which depends on the concentration (c×10-6) of H2S by the equation:IH = 8.525 ×c0.7249. lt is proved that the electrochemical H permeation method is a practical way to assess the susceptibility to SSCC.

Dark Matter and the Energy-Momentum Relationship in a Hydrogen Atom

Einstein derived the energy-momentum relationship which holds in an isolated system in free space. However, this relationship is not applicable in the space inside a hydrogen atom where there is potential energy. Therefore, in 2011, the author derived an energy-momentum relationship applicable to the electron constituting a hydrogen atom. This paper derives that relationship in a simpler way using another method. From this relationship, it is possible to derive the formula for the energy levels of a hydrogen atom. The energy values obtained from this formula almost match the theoretical values of Bohr. However, the relationship derived by the author includes a state that cannot be predicted with Bohr’s theory. In the hydrogen atom, there is an energy level with n = 0. Also, there are energy levels where the relativistic energy of the electron becomes negative. An electron with this negative energy (mass) exists near the atomic nucleus (proton). The name “dark hydrogen atom” is given to matter formed from one electron with this negative mass and one proton with positive mass. Dark hydrogen atoms, dark hydrogen molecules, other types of dark atoms, and aggregates made up of dark molecules are plausible candidates for dark matter, the mysterious type of matter whose true nature is currently unknown.

S-1分子筛羟基窝锚定钴用于丙烷脱氢制丙烯

以全硅MFI分子筛(S-1)为载体,采用简单的浸渍法制备了不同钴(Co)含量的Co/S-1催化剂并应用于丙烷脱氢反应。利用X射线衍射(XRD)、氮气吸附-脱附、傅里叶变换红外光谱(FT-IR)等技术对Co/S-1进行表征。结果表明,Co负载在S-1载体上并与S-1的Si—OH反应生成单位点Co物种和超小的Co纳米团簇,这些物种是丙烷脱氢的主要活性中心。Co的负载量对丙烷脱氢影响很大,当负载量较低时,活性Co物种较少,丙烷脱氢性能较差;当负载量较高时,Co物种会团聚成大颗粒不利于丙烷脱氢反应。通过优化制备条件,发现当Co负载量为1%(质量分数)时,Co/S-1的丙烷脱氢性能最优,循环使用5次后丙烷转化率、丙烯选择性和丙烯产率均未出现明显的下降。

多硝基含能化合物5 s爆发点的定量构效关系

为精确预测含能材料的5 s爆发点,解决大量新型含能材料实验测试难度大、安全数据不全等问题,基于定量构效关系(QSPR)原理,研究多硝基含能材料分子结构与5 s爆发点(ln T E)间的内在定量关系。应用集成学习算法随机森林(RF)筛选出8个对5 s爆发点具有显著影响的分子描述符;采用人工神经网络(ANN)建立90种多硝基含能材料5 s爆发点的预测模型。73种训练集的复决定系数为0.918,均方根误差为0.036,平均绝对误差为0.027。17个检验样本的复决定系数为0.903,均方根误差为0.061,平均绝对误差为0.053。对模型进行了验证以及应用域评价。结果表明:模型具备较好的预测性和泛化性能,可用于对多硝基含能材料的5 s爆发点进行精度较高的预测,有效解决现有含能材料的爆发点数据不够全面的问题,为相关产品研制与生产安全提供参考。

Relationships between two Pseudoalteromonas strains isolated from the Canada Basin and the Southern Ocean using a polyphasic approach

The evolutionary relationships and taxonomic position of two marine planktonic bacterial strains BSw20211 and BSwl0014, isolated from the Canada Basin and from the Southern Ocean, respectively, were determined using a polyphasic taxonomic approach. There was a close phylogenetic relationship between the two strains and most phenotypic properties were shared. Nonetheless, they were found to belong to different species of the genus Pseudoalteromonas on the basis of genotypic analyses. Findings were consistent with the suggestion that gyrB gene sequence comparison and DNA-DNA relatedness might better define phylogenetic relationships of bacteria at the species level. However, a cut-off value of 90% gyrB gene sequence similarity was not reliable for the differentiation of species within the genus Pseudoalteromonas.

Genetic Variations and Relationships of Papua’s Endemic Orchids Based on RAPD Markers

Orchidaceae has known as an attractive flower and immense species. We have found a large species of Orchidaceae grow naturally in Papua’s jungle, Indonesia territorial. This study aims to reveal genetic variation and genetic relationships among endemic orchids in Papua based on RAPD markers. The study included 26 accessions of Papua’s endemic orchids used for genomic DNA extraction. Genomic DNAs were extracted by usingDNAextraction kit from Qiagen and genomic DNA amplification by using 10 decamer RAPD primers. DNA fragments that were amplified by Polymerase Change Reaction (PCR) were visualized and documented by using UV illumination apparatus. Genetically, endemic Orchids in Papua were described high variation. Fragments amplification by using ten RAPD primers and performed in the PCR tools resulted in 54 numbers of polymorphic fragments and no monomorphic band. The number of polymorphic bands per primer ranged from 4 to 7 with averaged 5.4 bands per assay unit. The genetic dissimilarities (GDs) among examined orchids ranged from 0.10 to 0.94 based on Nei’s unbiased coefficients. Dendrogram construction showed that Papua’s endemic orchid (PEO) samples different from another and separated to form group by their own at the 0.40 coefficient value and at the 0.6 coefficient value indicate that PEO sample is divided into nine groups i.e. samples at the genera level were separated into their own groups.

On the Relationship between Atmospheric Carbon Dioxide and Global Temperature

The study of dynamic relationships between the atmospheric carbon dioxide and the Earth’s global temperature in the current changing climate supported the notion that the trend in the global temperature followed the trend in the atmospheric CO2 before the climate hiatus that started in the beginning of the 21st century. During the hiatus period, the heat trapped by the atmospheric CO2 is going mostly to the ocean. This conclusion is supported by comparison of the CO2 trend with the trend in the ocean heat content. The phase relationships between the CO2 and temperature are more complicated after the removal of the trends. The phase relationships are chaotic on time scales shorter than the annual time scale. During 1986-2008, the atmospheric CO2 changed in an-ti-phase with the global temperature. The phase relationship reversed in 1979 and after 2010. The atmospheric CO2 was in-phase with the global temperature on the El Nino time scale (2.3 - 7 years) except during very strong El Nino years in 1991-1999 when CO2 led the global temperature.

Application Research of Ingroup Preference in Employee Relationship Management

With stepwise development of Chinese enterprise,management problem is increasingly prominent,especially human resource management issues. Facing international environment of entering into World Trade Organization,the country accelerates construction pace of human resource management subject in colleges and universities,which provides professional channel for management efficiency and market competition ability of Chinese enterprise,but it is still far from practice. In this paper,the concept,origin and inhibition factors of ingroup preference are elaborated. Based on the visual angle of ingroup preference,started from four dimensions( enterprise incentive system,talent management idea,psychological contract and employee communication consciousness),main problems existing in employee relationship management of modern enterprise are explored. It is specially emphasized that manager often holds the blame in front of dealing with the crisis after contradiction,which is " fatal point" neglected in employee relationship management of modern enterprise. To improve its core competitive power,enterprise must value harmonious relationship with employees.

血浆白蛋白、游离蛋白S及D-二聚体与子痫前期发病的相关性

目的探讨血浆白蛋白(PA)、游离蛋白S(fPS)及D-二聚体(D-D)与子痫前期(PE)发病的关系。方法选取2020年1月至2021年12月江苏省溧阳市人民医院(以下简称“我院”)规律产检的PE患者112例记为PE组,并选择同期我院进行产检的健康妊娠孕妇120名记为对照组。比较两组一般资料及临床资料、血浆PA、fPS及D-D水平;PE发病的影响因素采用logistic回归分析;血浆PA、fPS及D-D对PE发病的预测价值采用受试者操作特征曲线。结果PE组收缩压、舒张压、尿蛋白、血尿酸、纤维蛋白原、同型半胱氨酸、超敏C反应蛋白、D-D水平高于对照组;活化部分凝血酶时间、血浆PA、fPS低于对照组(P<0.05)。纤维蛋白原(OR=2.855)、PA(OR=0.314)、fPS(OR=0.297)、D-D(OR=3.053)为PE发病的影响因素(P<0.05)。血浆PA、fPS、D-D联合检测的曲线下面积高于各指标单独检测。结论血浆PA、fPS及D-D与PE发病有关,且血浆PA、fPS及D-D联合检测对PE发病的诊断价值较高。

Progress Made on China-U.S.Trade Relationship at the 22nd JCCT Session

China and the United States concluded the 22nd session of the U.S.-China Joint Commission on Commerce and Trade (JCCT) on November 21 in Chengdu, China. Chinese Vice Premier Wang Qishan cochaired the two-day meeting with U.S. Secretary of Commerce John Bryson and U.

Exploration on the Characteristics and Important Relationships of Xi Jinping's New Concept of Coordinated Economic Development

During the 18 th CPC National Congress, Xi Jinping raised a series of economic development thoughts, namely the five new concepts of development; innovative, coordinated, green, open and shared development, and put forward a series of economic development thoughts including"people-centered"economic development. These are the new summations of the practice of socialism with Chinese characteristics, and the latest achievements in the theory of the political economics of socialism with Chinese characteristics."People-centered"is both the starting point and final purpose of coordinated economic development, an accurate mastery of social and economic development rules, and also the foundation and specific manifestation of coordinated development between people and society. People's subjectivity, coordinated inclusiveness and dialectics of development are the characteristics of coordinated economic development. Regional coordinated development, urbanrural coordinated development, industrial coordinated development, coordinated development of national defense and economic construction, supply and demand coordinated development, ecological coordinated development and interacted coordinated development of the global economy are the important relationships of coordinated economic development that we have to recognize and handle properly.

基于刺突蛋白(S)和核衣壳蛋白(N)的冠状病毒进化关系分析

冠状病毒在系统分类上属冠状病毒科(Coronaviridae)冠状病毒属(Coronavirus),是一种具有球形颗粒和包膜结构的单链RNA病毒。从2003年在中国暴发的重症急性呼吸综合征(SARSCoV),到2012年在沙特出现的中东呼吸综合征(MERS-CoV),再到2019年开始报道的新型冠状病毒感染(2019-nCoV),21世纪冠状病毒已经3次严重危害到人类的健康。对冠状病毒的序列特征与进化关系进行分析对病毒的起源与防控具有重要意义。本研究从GenBank数据库中筛选到30条冠状病毒刺突蛋白(S)、核衣壳蛋白(N)的蛋白序列,用邻接法构建进化树,分析冠状病毒进化关系,并对蛋白保守基序进行了分析。结果显示:2019-nCoV与从云南省的中菊头蝠中检测到的冠状病毒分离株RaTG13进化关系最近,并且与SARS-CoV具有较近的亲缘关系,与其他哺乳类和禽类动物感染的冠状病毒遗传进化关系较远。同时发现,相比S蛋白,N蛋白更适合用于构建冠状病毒进化树。保守基序分析表明:N蛋白中,选择的30个蛋白中有9个只含有2个保守元件,21个成员含有3个保守元件,保守元件在蛋白中的分布相对均匀;S蛋白中,选择的30个蛋白均含有3个保守元件,且集中在C端。本研究结果将为冠状病毒的进化关系及防治措施提供一定的理论依据。

An Analysis on Women's Relationship in The House of Mirth

In The House of Mirth,written by Edith Wharton,most of feminist critics emphasize the awakening process of Lily’s selfconsciousness and women’s suffering in that patriarchal society.Different from them,the paper attempts to equally focus on the other female characters in the novel and regard the relations between them as a whole in order to reveal that most of women,especially those from the upper-class,still fail to recognize the necessity of unity,and it’s still a long way for them to go until reach the final success.