bluuebunny/crossref_metadata_2025 huggingface dataset:
From Edom to Idumea Septuagint References to Edom and Idumea
Authors: Marciak Michal
Published: December 2020

This paper compares Hebrew (MT) and Greek (LXX) Biblical references to the Edomites and their homeland. The key terms that have been taken into account in the present paper are Edom (אדום), Edomites (אדומים), Seir (שעיר), and Esau (עשו). The purpose of the comparison of the Hebrew and Greek references is to check whether the LXX passages contain any textual differences that may reflect historical events that occurred between the time of the composition of the Hebrew Bible and the time of the creation of the Septuagint, especially the formation of the province of Idumea directly south of Judea and increased cultural activity between the Judeans and Idumeans. In the most general terms, the LXX renderings of the Hebrew terms Edom Edomites (אדומים), Seir (שעיר), and Esau (עשו) do not contain any changes that would be important in terms of the historical geography of southern Palestine or the emotional attitude of Biblical writers towards the Edomites/Idumeans. The term אדום is rendered as either Ἐδώμ (mostly) or Ἰδουμαία, and in most cases the two Greek names are used as synonyms. In turn, the Greek equivalents of עשו, שעיר, and אדומי are Σηίρ, Ἠσαῦ, and Ἰδουμαῖος. Only in some cases may we speak about important differences. First, the LXX Job appendix (Job 42:17a and 42:17b-e) reflects the very specific historical context of when the Idumeans settled directly south of Judea and became more closely connected with the Judeans, either through actual conversion or increased cultural exchange. Second, although in most cases the Greek names Ἰδουμαία or Ἐδώμ are used interchangeably, one may notice a certain preference for the term Ἰδουμαία in some parts of the LXX, which may not always be a coincidence. For instance, the term Ἰδουμαία is used only for the genealogy of Eliphas (Gen. 36). Given the fact that Eliphas also plays an important role in the genealogy of Job in the LXX Appendix and this is also the only Idumean genealogy that was known to Josephus (in Ant. 2.4-6), it may be suggested that the names of the Eliphas chieftains were particularly well known in Hellenistic and Early Roman times, and the Judeans saw them as being connected with the contemporary Idumeans. Furthermore, the LXX Samuel tends to connect David with (the conquest of) Ἰδουμαία (2 Sam. 8:12-14; while Saul’s con-s quests are attributed to Ἐδώμ). Given the tendency of 1-2 Macc. to refer to David as a model of the Hasmoneans (1 Macc. 2:57, 4:30; 2 Macc. 2:13), this tendency may not be coincidental.
The impact of oral health on the quality of life in elderly patients
Authors: Kostić Milena , Igić Marko , Pejčić Ana
Published: December 2020

Poor oral hygiene and diseases of the teeth and oral tissues can affect all aspects of patients' lives. The aim of the study was to determine the subjective assessment of oral and general health and their impact on the quality of life in elderly patients. The research included 46 patients, geriatric center users, who were asked questions from a three-part questionnaire. The first part of the questionnaire referred to the basic sociodemografic data. The second part of the questionnaire was the modified Oral Impacts of Daily Performance (OIDP), followed by an assessment of general and oral health by the patient. Likert's five-step scale (1 - 5) determined the frequency and intensity of the difficulties encountered, as well as the subjective assessment of the state of health. Based on the modified OIDP questionnaire, we found that all patients had some difficulties due to oral complaints. Even 86.96% of patients, due to with the existence of oral symptoms, experienced eating disorders, difficulties in enjoying food, laughing and showing teeth without any discomfort, as well as enjoying socializing with other people. Patients with partial edentulism had higher OIDP scores than edentulous patients. OIDP scores did not depend on sex, marital status, or on the educational structure of patients. Respondents with serious difficulties had a statistically significantly higher need for dental interventions. Improvement of oral health and frequent dental examinations could improve the functions of the orofacial system, the appearance and self-confidence of patients, which would have a positive impact on their social life.
Green tea and bilberry protective effect against gentamicin-induced nephrotoxicity in rats
Authors: Veljković Milica , Pavlović Dragana , Ilić Ivan , Sokolović Dušan
Published: December 2020

The aim of our study was to investigate if green tea and bilberry have protective effect on gentamicin-induced kidney damage, when applied together, and to make a connection between their effects. GM group of rats received only gentamicin, GT group received green tea only, B group received only bilberry, whereas control (C) group received saline only. GT+GM group received green tea together with gentamicin, and B+GM group received bilberry together with gentamicin. Biochemical analysis showed significantly increased urea and creatinine levels in GM group when compared to groups that also received bilberry or green tea. Histological analysis showed complete disruption of glomerular basal membrane as well as basal membranes of both proximal and distal tubules in GM group. These destructive effects were significantly milder and limited only to proximal tubules when bilberry or green tea was applied simultaneously with gentamicin. Both green tea and bilberry protective effect on gentamicin-induced nephrotoxicity is manifested because of their strong antioxidant activity. Since they are strong antioxidants, widely distributed in nature, they can offer available and inexpensive adjuvant therapy in Gram-negative infections, which can relieve gentamicin nephrotoxicity, but will not affect its bactericidal effect.
Mosaic of original cultural values of Serbs of the Kosovsko Pomoravlje
Authors: Popović Brankica
Published: December 2020

Custom, as a social phenomenon, first and foremost refers to the presence of an order and a morality in a community of people, which presupposes a predetermined rule, behavior and respect for its specific unwritten laws. Specific characteristics and manifestations of interpersonal relationships and behavior are visible in community speech, creativity and artistic expression, architecture and culture of housing, their manner of dressing and their festive costumes, as well as in the veneration of family, church, school and other holidays and events. The richness and diversity of such characteristics and customs becomes a criterion for the development of the ethical consciousness of a society, a person or a family, as well as a measure of the level of their culture. The freedom of a moral person is reflected, in addition to good will, in the correct attitude and understanding of ordinary manifestations and the emotions of members of one social community conditioned by them. Each culture develops its own spiritual and material heritage and thus defines its identity and character, as its own way of understanding the world. The Serbs of Kosovsko Pomoravlje are dedicated guardians of all Serbian historical traditions, especially those about Kosovo. On that fateful task, they regularly had support in their church and clergy, as well as in the dedicated work and creativity of their teachers, such as Zarija Popović and Atanasije Urošević.
Repair procedure of belt wagon BRs 1200 crawler unit
Authors: Jakovljević Vladimir , Desnica Eleonora , Prvulović Slavica
Published: December 2020

The paper presents and describes in detail the specific procedures that are carried out during the repair of the crawler unit on the belt wagon BRs 1200.29/32, whose performance is the basis for high quality and efficient maintenance of these machines on site, as well as in repair shops. These procedures are complex interventions performed as part of the preventive maintenance process. The success of the maintenance process is presented as a workflow with as few failures and downtime as possible, also as a process without accidents, and in case of their occurrence, the possibility of the fastest elimination, all of which result in the satisfaction of both users and maintainers.
Errors and artifacts on radiographs
Authors: Nikolić Simon , Milenković Aleksandra , Tomić Bojan , Radović Branislava , Gašić Miloš
Published: December 2020

Introduction: The process of recording a patient includes a procedure with several separate segments during work that together provide the imaging to be obtained for adequate radiological analysis. Throughout the process, it is possible to experience errors that create artifacts on X-rays which ultimately results in an inadequate recording that is not for valid analysis. Aim: Determine the total number of radiological films that are not for valid analysis. Sort out and analyze errors in radiographs according to the work process. Provide recommendations for improving the quality in the process of recording the patient. Material and methods: A prospective study was conducted at the Radiology Clinic of the Clinical Hospital Center Pristina-Gracanica, for two calendar years. All films that are not for valid analysis were considered. The radiological procedure of patient imaging was broken down into logical segments so that possible errors could be observed. We have summarized the causes of the artifacts in five appropriate groups (errors made by the recording technique, during the acquisition of the image, caused by the object of recording, during the processing of films in an automated machine and improper handling of films). Results: The total amount of used X-ray films is 32600 pieces, of which 242 (0.74%) were errors and artifacts. The most common format of a film with an error or artifact was 30x40 cm. A frequency of errors according to the cause of the occurrence is classified into appropriate groups. The largest number was in a group 1 - 155 (64.04%), in a group 2 - 3 (1.24%), in a group 3 - 13 (5.37%), in a group 4 - 67 (27.69%), and in a group 5 - 4 (1.66%). Conclusion: In the proper systematization of all observed errors and artifacts of X-ray film, it allows us to realise the place of error during the whole process of recording and processing of the film. We hereby wish to propose their elimination and improve the quality of the radiology department.
The immediate effects of the Covid-19 pandemia on postpartum women
Authors: Stojanov Jelena , Stojanov Aleksandar , Stanković Miodrag , Žikić Olivera
Published: December 2020

The new pandemic, caused by the corona viral disease 2019 (Covid-19), has brought with it a series of restrictive measures that have drastically altered people's way of life and which restrict freedom of movement, behavior and social engagement. At the time of pandemia, almost all aspects of each individual lifestyle have been impaired, especially in members of vulnerable groups, particularly women in postpartum women. Acute psychological reactions to a pandemia may include insomnia, fear of infection, anxiety, frustration, panic attacks, loneliness, but also depressive episodes. Non-psychotic postpartum mood and anxiety disorders can occur as an inability to adapt to stressful life situations. A comprehensive understanding of the impact of the pandemia on the mental health of women in the postpartum period is needed, in order to devise adequate approaches to recovery from such a major disaster as the Covid-19 pandemic.
Defining and Managing High-Risk Multiple Myeloma: Current Concepts
Authors: Costa Luciano J. , Usmani Saad Z.
Published: December 2020

Multiple myeloma is a very heterogeneous disease. Despite advances in diagnostics and therapeutics, a subset of patients still experiences abbreviated responses to therapy, frequent relapses, and short survival and is considered to have high-risk multiple myeloma (HRMM). Stage III diagnosis according to the International Staging System; the presence of del(17p), t(4;14), or t(14;16) by fluorescence in situ hybridization; certain gene expression patterns; high serum lactic dehydrogenase level; and the presence of extramedullary disease at diagnosis are all considered indicators of HRMM. More recent evidence shows that patients who experience response to therapy but with a high burden of measurable residual disease or persistence of abnormal FDG uptake on PET/CT scan after initial therapy also have unfavorable outcomes, shaping the concept of dynamic risk assessment. Triplet therapy with proteasome inhibitors, immunomodulatory agents, and corticosteroids and autologous hematopoietic cell transplantation remain the pillars of HRMM therapy. Recent evidence indicates a benefit of immunotherapy with anti-CD38 monoclonal antibodies in HRMM. Future trials will inform the impact of novel immunotherapeutic approaches, including T-cell engagers, CAR T cells, and nonimmunotherapeutic approaches in HRMM. Those agents are likely to be deployed early in the disease course in the setting of risk- and response-adapted trials.
Assembling Styles of Truth in Rwanda’s Gacaca Process
Authors: Ingelaere Bert
Published: December 2020

The gacaca process was introduced in Rwandan society to deal with the legacy of the 1994 genocide against Tutsi. Empirically informed research points to the ambiguous and ambivalent attitudes of participants regarding testimonial activities, namely the search for the truth. Hence the questions: what does the gacaca experience reveal about this elusive and multidimensional notion called ‘the truth’? And, what does ‘the truth’ as experienced by Rwandans reveal about the nature of the gacaca process? This article aims to answer these questions by identifying and qualifying the different styles of truth at work in the gacaca process, namely the forensic truth, the moral truth, the effectual truth and, the Truth-with-a-Capital-T. The first is a consequence of the design of the court system, the second is derived from the socio-cultural context, the third is a consequence of the decentralised milieu in which the gacaca courts were inserted, the fourth is the result of the overall political context in which the gacaca activities took place. This process of assembling these different styles of truths is conceptualised through the notion of agencement that captures the intricate interplay of agency and structure, contingency and structuration, change and organisation shaping the gacaca process.
Vector modulation instability in an arbitrary polarized direction in strong birefringence fibers
Authors: Jia Wei-Guo  , Yang Xing-Yu  ,   内蒙古大学物理系,呼和浩特010021
Published: December 2020

The coherently coupled nonlinear Schrdinger equation of the propagation of a light pulse in a nonlinear birefringence fiber has been utilized.We have studied modulation instability not only in an anomalous dispersion regime but also in a normal dispersion regime when the angle between the polarized direction and the birefringence axes is arbitrary.The results show that the instability polarized region and stability polarized region exist not only in the anomalous dispersion regime but also in the normal dispersion regime. The input pulses have obviously different gain spectra when the instability polarized region and input different power are different.
Precise criterion for excited states of the lithiumlike systems
Authors: Chen Chao  , Wang Zhi-Wen  , Li Jia-Ming  ,   (1)辽宁师范大学物理系，大连116029; (2)上海交通大学物理系，上海200030;清华大学物理系，原子分子纳米科学研究中心，北京100084; (3)上海交通大学物理系，上海200030;清华大学物理系，原子分子纳米科学研究中心，北京100084;中国科学院物理研究所，北京100080
Published: December 2020

By using the accurate inequalities of the electron density at the nucleus and radial expectation values for atomic systems derived by Gálvez and Porras, we separately construct two sets of precise criterion of the wave function, they are another precise criterion independent of energy to test quality of the wave function. In this paper, we use the excited states of lithiumlike systems as research objects and examine the upper bound of the electron density at the nucleus and radial expectation value for the lithiumlike systems 1s23s state, R6 defined by the upper bounds of the electron density at the nucleus and R4 defined by the upper bounds of radial expectation value for the lithium atom 1s23s state in different calculation methods are also tested，at the same time we check up the upper bound of the electron density at the nucleus and radial expectation value for double excited states of the lithium atom. Research has shown that these two sets of inequalities can be used as precise criterion for wave function of energy states of atomic systems.
Suppression of pulse walk-off effect during the process of pulse compression by cross-phase modulation of pulse pair
Authors: Xia Guang-Qiong  , Wu Zheng-Mao  , Chen Hai-Tao  ,   (1)西南师范大学物理学院，重庆  400715; (2)西南师范大学物理学院，重庆  400715;重庆大学光电技术与系统教育部重点实验室，重庆  400044
Published: December 2020

A new asymmetrical pulse pair method is proposed which can be used to suppress the pulse walk_off effect during the process of pulse compression by the cross phase modulation of pulse pair. By using asymmetrical pulse pair method and asynchronous coupling method, the suppressions of the walk_off effect have been investigated numerically. Results show that for an incident Gaussian pulse with peak power 10mW and full_width_at_half_maximum (FWHM) 5ps, we can obtain a compressed pulse with the compression factor 137, pedestal energy ratio 0122 and the peak power 116mW by adopting the asymmetrical pulse pair method.
Entropy evolution of the field interacting with a quasi-Λ-type four-level atom
Authors: Zhou Qing-Chun  , Zhu Shi-Ning  ,   (1)江苏科技大学数理系，镇江  212003;南京大学物理系，固体微结构物理国家重点实验室，南京  210093; (2)南京大学物理系，固体微结构物理国家重点实验室，南京  210093
Published: December 2020

The evolution of the field (atomic) entropy in a system of a quasi_Λ_type fourlevel atom interacting with an uncoupled two_mode coherent field is investigated. The effects of initial atomic state, the initial mean photon number and the splitting of the atomic energy levels on the entropy are discussed. The system reduces to that of a twolevel or threelevel atom interacting with a singlemode coherent field in special cases.
Investigation of Ti:sapphire femtosecond laser mode-locking mechanism
Authors: Zhang Xiao-Hua  , Zhang Guang-Yin  , Jiao Zhi-Yong  , Gu Xue-Wen  , Yan Cai-Fan  , Wu Ding-Er  , Chai Lu  , Cao Shi-Ying  ,   (1)南开大学物理学院，天津  300071; (2)南开大学物理学院，天津  300071;南开大学泰达应用物理学院，天津  300457; (3)天津大学精密仪器与光电子工程学院，光电子信息技术科学教育部重点实验室，天津  300072
Published: December 2020

In this paper,the luminescence dynamics of X_folded cavity Ti:sapphire femto_second laser has been measured,and the self_mode_locking mechanism and process of femto_second laser have been investigated systmatically by means of propagation_circle and transform_circle graphic method.A new mode_locking mechanism,self_pulsing Kerr_lens switching and magnifying mode_locking,has been put forward.
Comparison of performance for Raman-amplified optical-fiber transmission systems
Authors: Ma Yong-Hong  , Xie Shi-Zhong  , Chen Ming-Hua  ,   清华大学电子工程系，北京  100084
Published: December 2020

A simple method is provided for the performance comparison of the Raman-amplifie d optical-fiber transmission systems. The results show that, compared with conve ntional hybrid-Raman-amplification systems, the maximum transmission distance ca n be increased by about 10% and 30% separately, and the input signal power can b e decreased by about 6 dB for bidirectional-pumping all-Raman-amplification syst ems based on uniform or dispersion-managed transmission fibers.
Studies on the dispersion in photonic crystal fiber using the step effective index model
Authors: Zhang De Sheng  , Dong Xiao Yi  , Zhang Wei-Gang  , Wang Zhi  ,   南开大学现代光学研究所,天津  300071
Published: December 2020

As a precondition , it was presented that the single_mode optical fiber , the dispersion_shift optical fiber and the dispersion_flatten optical fiber can be regarded as the special examples of the index_guiding photonic crystal fiber(PCF) under a determinate condition, when the new step effective index model （SEIM） was used to discuss the chromatic dispersion properties of PCF. The result compared with the experimental data reported in the literature indicated that such a SEIM can be used to uncover more interesting dispersion regimes in PCFs. In particular, the speed of calculation by using the SEIM is very quick. Finally, the dispersion characteristics of the PCF with different air hole diameter d, air hole pitch Λ and the core radius a were also discussed.
Phenomena of impact bifurcations in vertically vibrated granular beds
Authors: Jiang Ze-Hui  , Li Bin  , Zhao Hai-Fa  , Wang Yun-Ying  , Dai Zhi-Bin  ,   哈尔滨工业大学应用物理系，哈尔滨  150001
Published: December 2020

The pressure of granular mass on container bottom has been experimentally investigated in vertically vibrated granular beds. Pulse signals are found of the pressure, and the pulse strength undergoes subharmonic bifurcations controlled by the scaled vibration acceleration. Condensed state of particles is observed at the bed bottom, in which the particles are closely packed, with small free path, and move like a bulk block.
Effects on the mechanism of nucleation and orientation of amorphous PZT nano thin film treated by different crystallization technics
Authors: Huang Wen  , Zeng Hui-Zhong  , Zhang Ying  , Jiang Shu-Wen  , Wei Xian-Hua  , Li Yan-Rong  ,   电子科技大学微电子与固体电子学院, 成都  610054
Published: December 2020

Pb(Zr048Ti052)O3(PZT) thin films were prepared on the Pt/Ti/SiO2/Si substrates by RF_ magnetron sputtering method at room temperature. After rapid thermal annealing (RTA) and conventional furnace annealing (CFA) at different temperatures, the amorphous films were transformed into polycrystalline PZT thin films with (100) and (111) orientation, respectively. The phase formation and degree of orientation were investigated by x_ray diffraction (XRD). The surface micro_structure and ferroelectric domains formed by the spontaneous polarization in the corresponding region were observed by atom force microscopy and piezoresponse force microscopy. The distribution character of the ferroelectric domains with different preferred orientation in the films were studied. The result shows the perovskite PZT crystalline was found to hetero_nucleate epitaxially on top of the PtPb intermetallic phase at the PZT/Pt interface during RTA. The crystallizing speed along the interface is much faster than perpendicular to the film surface. While the nucleation of the films annealed by CFA dominantly homo_nucleate around the defects and impurities in the films. Different preferred orientation growth is attributed to different nucleation mechanism.
Calculation of the enhancement factor for the individual conductive nanowire in field emission
Authors: Wang Xin-Qing  , Wang Miao  , Li Zhen-Hua  , Yang Bing  , Wang Feng-Fei  , He Pi-Mo  , Xu Ya-Bo  ,   (1)浙江大学力学系,杭州  310027; (2)浙江大学物理系，杭州  310027
Published: December 2020

The potential and the electric field at the end of the individual nanowire under an electric field were calculated with the image charge model. With the nanowire as a field emitter, the enhancement factor was given by the expression: β０＝h/ρ+35. Taking into account the influence of the anode_cathode distance, the enhancement factor at the end of the nanowire could be adjusted based on the equation: β=h/ρ+35+A(h/d)3, where h and ρ are the length and the radius of the nanowire respectively; d is the anode_cathode distance and A is a constant. From the above results, it is concluded that the aspect ratio is the most important factor for the nanowire emitter and the anode_cathode distance also slightly influence the enhancement factor of the nanowire in field emission, and the enhancement factor increases with the decrease of the anode_cathode distance.
Quantization of mesoscopic quartz piezoelectric crystal equivalent circuit
Authors: Li Hong-Qi  ,   菏泽学院物理系,菏泽274015
Published: December 2020

By using the idea of damped harmonic oscillator operation,a mesoscopic quartz piezoelectric crystal equivalent circuit is quantized. By this basic theory, we studied the quantum fluctuation of the voltage and current in each branch of the mesoscopic quartz piezoelectric crystal equivalent circuit under the squeezed vacuum state and the vacuum state.
Fabrication and characterization of YBa2Cu3O7－δ/SrNb0.01Ti0.99O3 p-n junctions
Authors: He Meng  , Lü Hui-Bin  , Zhou Yue-Liang  , Cheng Bo-Lin  , Chen Zheng-Hao  , Jin Kui-Juan  , Yang Guo-Zhen  ,   中国科学院物理研究所，北京凝聚态物理国家实验室，北京 100080
Published: December 2020

A pn junction is fabricated by using the pulsed laser deposition (PLD) technique for a ptype YBa2Cu3O7-δ (YBCO) film on the ntype SrNb001Ti099O3(SNTO) single crystal substrate. The measured results reveal that the YBCO thin film is highly corientated structure and shows very good superconducting properties. The YBCO/SNTO pn junction has good rectification property and stability under variation of temperature and magneticfield.
Degradation and physical mechanism of NBT in deep submicron PMOSFET's
Authors: Liu Hong Xia  , Zheng Xue Feng  , Hao Yue  ,   西安电子科技大学微电子研究所，西安710071
Published: December 2020

This paper investigates the dependence of current and voltage characterizations on stress time in deep submicron PMOSFET's before and after negative bias temperature (NBT) stress, we mainly focus on the threshold voltage shift under NBT stress. It is experimentally demonstrated that the electrochemical reactions at the interface between gate oxide and substrate and the diffusion of hydrogen related species in the oxide are the major causes of the NBT in PMOSFET's. PMOSFET degradation caused by NBT depends on the balance of reactionlimited and diffusionlimited mechanisms.
Synchrotron radiation photoemission study of Yb2.75C60
Authors: He Shao-Long  , Li Hong-Nian  , Wang Xiao-Xiong  , Li Hai-Yang  , Kurash I.  , Qian Hai-Jie  , Su Run  , Abbas M. I.  , Zhong Jun  , Hong Cai-Hao  ,   (1)浙江大学物理系,杭州310027; (2)中国科学院高能物理研究所同步辐射实验室，北京100039
Published: December 2020

The Yb275C60 thin film was prepared and studied by using the synchrotron radiation ultraviolet photoemission spectroscopy(PES) in an ultrahighvacuum system. The spectral line obtained in the range between the Fermi level and ～5 eV binding energy consists of those lines from the valence band (the molecular orbital LUMO, HOMO and HOMO1 derived energy bands of C60) and core levels(Yb 4f7/2 and 4f5/2). Taking into account the variations of the photoinization cross sections of C 2p and Yb 4f with different photon energies, we have measured the photoemission spectra under the condition of varying photon energies, and carried out simulations to deduce the component contributions. The peak positions, widths and intensities for the components are obtained quantitatively. The results reveals that the photoemission of 4f electrons has a significant intensity with the photon energies larger than ～300 eV, and that the measured spectra depart drastically from the density of states of the valence band. To observe the valence band structure, one should carry out the PES measurements by using photons with energies less than 300 eV. The photoionization crosssection oscillation is also observed in Yb275C60 with almost the same oscillation period as that for pure C60 However, the oscillation amplitude is obviously smaller than that for pure C60, which reveals that the chemical environment of C60 in compounds has nonnegligible effects on the photoionization crosssection oscillation phenomenon.
Chaotic analysis for blast furnace ironmaking process
Authors: Gao Chuan-Hou  , Zhou Zhi-Min  , Shao Zhi-Jiang  ,   (1)浙江大学控制科学与工程系系统工程研究所，杭州  310027; (2)浙江大学数学系，杭州  310027
Published: December 2020

Based on the algorithm of Kolmogorov entropy presented by Grassberger and Procac cia, as the time series data of silicon content in molten iron of No.1 BF at Laiwu and No.6 BF at Linfen Iron and Steel Group Cos. to be as samples, their Kolmo gorov entropy are computed to be (01453±00151)nats·h-1-1 an d (01553±00140)nats·h-1-1, and the time scales of forecasti ng in both BFs are estimated to be about 688 and 644h respectively. Since the value of Kolmogorov entropy is finite and positive, there is chaos in both b last furnace ironmaking processes, and the idea that Kolmogorov entropy may be u sed to judge the condition of BF is presented.
The isospin effects on the momentum dissipation induced by the Coulomb interacti on in the process of heavy-ion collissions
Authors: Xing Yong-Zhong  , Liu Jian-Ye  , Guo Wen-Jun  , Hao Huan-Feng  ,   (1)天水师范学院基础物理学研究所，天水  741000;兰州重离子加速器国家实验室，兰州  730000; (2)天水师范学院基础物理学研究所，天水  741000;中国科学院近代物理研究所，兰州  730000;兰州重离子加速器国家实验室，兰州  730000; (3)中国科学院近代物理研究所，兰州  730000
Published: December 2020

The isospin effects of Coulomb interaction on the momentum dissipation in the heavy ion collissions at an intermediate energy has been studied carefully within the isospin dependent quantum molecular dynamics model. The results show that Co ulomb interaction induces the reduction of momentum dissipation because it leads the shrinking of the mechanical and chemical instability domains, and the degre e of reduction depends sensitively on the form and strength of symmetry potentia l. However, the property that the momentum dissipation depends sensitively on th e isospin dependences of in-medium nucleon_nucleon cross section and insensitiv ely on the symmetry potential, is true for the cases with and without the Coulom b interaction.
Investigation of electron momentum spectroscopy for inner valence orbitals 4a gg+4buu of diacetyl
Authors: Zhang Shu-Feng  , Su Guo-Lin  , Ren Xue-Guang  , Ning Chuan-Gang  , Zhou Hui  , Li Bin  , Li Gui-Qin  , Deng Jing-Kang  ,   清华大学物理系，北京  100084
Published: December 2020

The ionization energy spectra and the spherically averaged momentum distributions of inner valence orbitals for diacetyl have been investigated by using a high resolution (ΔE=115eV, Δp≈01a.u.) electron momentum spectrometer. The impact energy was 1200eV plus binding energy (i.e. 1201—1240eV) and a symmetric non-coplanar kinematics was employed. The experimental ionization energy spectra have been compared with the published photoelectron spectra. The momentum profiles of inner valence orbitals 4agg+4buu have been compar ed with the theoretical calculations obtained using Hartree-Fock method and den sity functional theory．The measured momentum distribution is consistent with th e theoretical calculations.
Optimization of kinoform in double-random-phase encryption
Authors: Yang Xiao-Ping  , Zhai Hong-Chen  ,   (1)南开大学现代光学研究所，天津  300071; (2)南开大学现代光学研究所，天津  300071;天津理工大学光电信息与电子工程系，天津  300191
Published: December 2020

In this paper, the design of kinoforms in double-random_phase encryption method is optimized by the memory-based simulated annealing technique, which is appl ied to the simulation experiment of a binary image and an image with gray levels . The results of the experiments show that, without increasing the abundance of design, the errors caused by the quantization of phases of kinoform and key is d ecreased, and almost the same image quality as the original one is obtained as a decoded image by the proposed method.
Numerical simulation on ultrashort laser pulses propagating in microstructure fi bers
Authors: Li Shu-Guang  , Zhou Gui-Yao  , Xing Guang-Long  , Hou Lan-Tian  , Wang Qing-Yue  , Li Yan-Feng  , Hu Ming-Lie  ,   (1)天津大学精密仪器与光电子工程学院，光电信息技术科学教育部重点实验室，天津  300072; (2)燕山大学红外光纤与传感研究所，秦皇岛  066004
Published: December 2020

For the first time to our knowledge, it is put forward that GNSE can be resolved by adaptive split-step Fourier method (ASSFM) basing on split-step Fourier method (SSFM) in this paper. It is found that ASSFM must be used to resolve GNSE f or ensuring precision when the frequency shift corresponding to soliton peak val ue is remarkable and microstructure fibers' parameters change along with frequen cy remarkably. It is found that the influence of dispersion on laser pulses evol ution and supercontinuum generation in microstructure fiber is remarkably. Mech anism and scope of expanded spectrum are different in fiber different dispersion regions. The precision of numerical simulation by ASSFM is higher than SSFM in the process of laser pulses propagating in microstructure fibers by reason that the variation of wavelength corresponding to pulse peak power can be considered adequately.
Research of edge plasma structure on the HL-1M tokamak
Authors: Hong Wen-Yu  , Yan Long-Wen  , Wang En-Yao  , Li Qiang  , Qian Jun  ,   核工业西南物理研究院,成都  610041
Published: December 2020

In this paper, experimental results of plasma characteristics in several discharges have been measured in the plasma boundary region of the HL-1M tokamak using a multiarray of Mach/Langmuir 6 probes, electrostatic 4 probes and 20 group of 3 probes. In the experiments of Ohmic discharge, lower hybrid current drive, supersonic molecular beam injection, multi-shot pellet injection and neutral beam injection, etc., the correlation between the Reynolds stress and poloidal flow in the edge plasma is obtaimed. The experimental results suggest that the confinement improvement is related to the increasing rotation velocity and to the decreasing edge fluctuation. The results indicate that the sheared poloidal flow can be generated in tokamak plasma due to the radially varying Reynolds stress. The particle confinement with low-density discharge can increase 1—2 times in LHCD. The particle confinement time and poloidal rotation velocity can at least be doubled after MPI, and that the particle confinement time can increase one order of magnitude and can obtain high performance plasma during the experiment of SMBI.
Influence of microstructure of nanoporous TiO２2 films on the perfor mance of dye-sensitized solar cells
Authors: Hu Lin-Hua  , Dai Song-Yuan  , Wang Kong-Jia  ,   中国科学院等离子体物理研究所,合肥  230031
Published: December 2020

Nanosized TiO２2 particles are prepared by sol-gel method, the avera ge size of which varies from 15 to 23nm. These nanoporous TiO２2 films are ap plied to d ye-sensitized solar cell modules. The x-ray diffraction patterns are used to d etermine the phase and average nanocrystalline size of TiO２2. The sh ape and pa rticles size of the crystal TiO２2 are shown by transmission electron microscop e. The conditions of nanoporous films microstructure in solar cells are measured by testing the BET surface and the microscopy of titania films. The photovoltai c performance of dye-sensitized solar cell modules with the size of 15cm×20 cm (the active area is 187.2cm２2) is discussed, at the same ti me, the eff ect of nanoporous TiO２2 films microstructure and average particles s ize of nan ocrystalline TiO２2 on dye-sensitized nanosized films solar cells is investigated in this paper.
Lattice Boltzmann simulations of moving elliptic cylinder in a Newtonian fluid
Authors: Zhang Chao-Ying  , Li Hua-Bing  , Tan Hui-Li  , Liu Mu-Ren  , Kong Ling-Jiang  ,   (1)广西师范大学物理与信息工程学院，桂林  541004; (2)桂林电子工业学院信息材料科学与工程系，桂林  541004
Published: December 2020

A dynamical model, based on the Lattice Boltzmann method, is presented for simul ating the two-dimensional moving elliptic cylinders in a Newtonian fluid. Using this model, we have simulated the motions of elliptic cylinders with different shapes in a Newtonian fluid under the same initial conditions, and the motions o f an elliptic cylinder under different initial conditions. The numerical simulat ions are compared with the results of moving cylinders under the same conditions . The characters of the two-dimensional moving elliptic cylinders are discussed, and some new results are obtained.
Guide modes in magnetic photonic crystal heterostructures in two-dimensional square lattices
Authors: Che Ming  , Zhou Yun-Song  , Wang Fu-He  , Gu Ben-Yuan  ,   (1)首都师范大学物理系,北京  100037; (2)中国科学院物理研究所,北京  100080
Published: December 2020

The photonic band structure of two-dimensional magnetic photonic crystals(MPCs) composed of magnetic pillars in different shapes (rectangular, square, hexagonal and circular) sitting on square lattice is investigated by use of the plane wa ve expansion method. The optimal MPCs, which possess the largest photonic band g ap and the lowest frequency in the middle of the photonic band gap, are picked u p when scanning the parameters (filling factor, orientation angle, and permeabil ity). Based on the results, we construct theoretically the mixed MPC heterostruc tures and investigate the guide modes at interface. The guide modes along the in terface of the heterostructures can be generated without any lattice distortion when the scattering pillars are in shapes of rectangle, hexagon, and circle.
Experimental study on high-voltage and high-power solar array secondary discharge
Authors: Li Kai  , Xie Er-Qing  , Lin Hong-Feng  , Wang Li  , Sun Yan-Zheng  , Cui Xin-Yu  ,   (1)航天科技集团公司五院510所，兰州  730000; (2)兰州大学物理科学与技术学院，兰州  730000; (3)兰州大学物理科学与技术学院，兰州  730000;航天科技集团公司五院510所，兰州  730000; (4)中国电子科技集团公司第十八研究所，天津  300381
Published: December 2020

The secondary discharge is an important factor for power loss in the high-voltag e and high- power solar cell array. This paper studies the characteristics of th e secondary discharge and the breakdown mechanism through identifying the voltag e threshold where the secondary discharge will probably occur and monitoring the pulse current of the secondary discharge. The results show that increasing the operation voltage and string current will increase the possibility of the occurr ence of the secondary discharge on the solar array. The special structure design and the presence of RTV grouting between the solar cell strings can prevent th e secondary discharge incidents efficiently.
Structure and magnetic properties of (Nd1－xErx)3Fe25Cr4.0 compounds
Authors: Luo Hong-Zhi  , Jia Lin  , Li Yang-Xian  , Meng Fan-Bin  , Shen Jiang  , Chen Nan-Xian  , Wu Guang-Heng  , Yang Fu-Ming  ,   (1)北京科技大学应用物理研究所，北京  100083; (2)河北工业大学材料学院，天津  300130; (3)中国科学院物理研究所磁学国家重点实验室，北京  100080; (4)中国科学院物理研究所磁学国家重点实验室，北京  100080;北京科技大学应用物理研究所，北京  100083; (5)中国科学院物理研究所磁学国家重点实验室，北京  100080;河北工业大学材料学院，天津  300130
Published: December 2020

Structure and magnetic properties of the (Nd1-xErx)3Fe25Cr40 (x=0—10) compounds have been investigated by means of x -ray diffraction and magnetic measurements. It is found that the compounds with x =0—08 crystallize in Nd3(Fe,Ti)29-type structure, A 2/m space grou p, but those with 082Ni17-type structure, P63/mmc space group. Both the Curie tem perat ure Tc and the saturation magnetization Ms of (Nd1 -xErx)3Fe25Cr40 de crease monotonically with increasing Er content. The easy magne tization direction (EMD) of the Nd3Fe25Cr40 compound is close to the ［040］ direction at room temperature, but makes a tilted angle with the ba sal plane of 1∶5 structure. With increasing Er content the EMD changes to much close to the [402] direction and the tilted angle increases. AC susceptibility m easurement indicates the appearance of a spin reorientation at low temperatures for the compounds with x=0—04 and x=10, and the spin reorientation temperature Tsr increases monotonically as the Er content increas es fo r the compounds with x=0—04 First-order magnetization process (FOMP) is observed in the compounds with 0≤x≤08 and the critical field Bc rof the FOMP decreases with increasing Er content from 66T for x=0 to 20T for x=07
The softening of magnon of two-dimensional insulating ferromagnets at low temperatures
Authors: Cheng Tai-Min  , Xian Yu-Ze  , Du An  , Zou Jun-Ding  ,   东北大学理学院物理系,沈阳  110006
Published: December 2020

A magnon-phonon interaction model is applied to two_dimensional insulating ferro magnets. By using Matsubara Green function theory, we have studied the magonon spectrum, and calculated the magnon dispersion curve on the main symmetric point and line in the Brillouin Zone for different parameters of the system. It is con cluded that at the boundary of Brillouin Zone there is a strong broadening in th e magnon linewidth and softening. The influences of longitudinal phonon and tran sverse phonon on the softening and broadening in the magnon linewidth are compar ed, and the influences of the parameters are also illustrated.
Quantum effects of the mesoscopic LC electric circuit in thermal Kerr state
Authors: Ruan Wen  , Lei Min-Sheng  , Ji Ying-Hua  , Xie An-Dong  ,   (1)江西师范大学物理系，南昌  330027; (2)江西师范大学物理系，南昌  330027;井冈山师范学院物理系，吉安  343009; (3)井冈山师范学院物理系，吉安  343009
Published: December 2020

Based on the fact that a mesoscopic capacitor can be regarded as a mesoscopic tunnel junction, we quantized the mesoscopic LC circuit by using the rotating -wave approximation.The study shows: Considering the coupled energy of the meso scopic capacitor, the system of the mesoscopic LC circuit will be equivalent to a Kerr system. We also used the thermal field dynamic theory to investigate the thermal Kerr state at a definite temperature and calculated the quantum fluc tuation of both charge and magnetic flux, and discussed the results.
Optimal design of two-dimensional photonic crystal polarization splitters
Authors: Li Ming-Yu  , Gu Pei-Fu  ,   浙江大学现代光学仪器国家重点实验室，杭州  310027
Published: December 2020

A method for designing two-dimensional photonic crystal polarization splitters is put forward. Optimal structure of a two-dimensional photonic crystal with a t riangular lattice of Ge rectanglular rods in BaF2 is presented. It is shown ho w a maximum photonic band-gap for TE mode is obtained by choosing the proper wid th of the rectangular rods. The two-dimensional bandgap for TE mode of this design is 0.083(2πc/a, here a is the period of grating). The polarization frequency band corresponds to a wavelength band ranging from 172 to 24μm, with the theoretical relative bandwidth being 33.1%. The fabrication of such a pho tonic crystal polarization splitter is an easy process based on coating films on the grating and is suitable for industrial making.
Polarimetric microwave radiation of wind-roughened sea surfaces
Authors: Guo Guan-Jun  , Su Lin  , Bi Si-Wen  ,   (1)遥感科学国家重点实验室，中国科学院遥感应用研究所,北京  100101; (2)遥感科学国家重点实验室，中国科学院遥感应用研究所,北京  100101;安徽蚌埠坦克学院物理教研室,蚌埠  233013
Published: December 2020

Polarimetric radiation of wind-roughened sea surfaces is modeled using a geometr ical approach combined with the statistical method. The focus is on the geophysi cal nature of azimuthal emission signatures of sea surfaces and their relation t o the wind direction. The geometrical optics model assumes that the surfaces are composed of tilted specularly reflecting facets with the reflecting fields from each facet contributing incoherently to the total upwelling radiation, and the total radiation is calculated as a statistical averaging of contributions from individual facets. The first three Stokes parameters of sea surfaces are derived . The bright temperature azimuthal variations are characterized by the second az imuthal harmonics, which can be explained by the asymmetry of wind-driven sea su rfaces. The simulation shows that the upwelling Stokes parameters are sensitive to the wind direction and exhibits azimuthal variations up to a few Kelvin in am plitude. Theoretical interpretation of sea surface emission signatures provides the potential possibility to facilitate ocean wind vector retrieval using purely passive means.
The quantum key distribution system based on polarization states produced by phase modulation
Authors: Tang Zhi-Lie  , Li Ming  , Wei Zheng-Jun  , Lu Fei  , Liao Chang-Jun  , Liu Song-Hao  ,   (1)华南师范大学物理与电信工程学院，广州  510631; (2)华南师范大学信息光电子科技学院，广州  510631
Published: December 2020

A method that can generate all kinds of nonorthogonal polarization states is induced for long distance and high bit rate generation quantum key distribution. T he polarization states are synthesized by two linearly polarization states contr olled by phase modulator. The modulator is allowed to produced non-quarter_wave phase delay so that can compensate the influence of birefrmgence during transmis sion throuogh the fiber. The structures of the encoder and the decoder based on the method are also described that can effectively reduce the bit error rate.
Quantization of non-integrable Hamiltonian by periodic orbits: an example of the study on chaotic Henon-Heiles system
Authors: Wang Pei-Jie  , Wu Guo-Zhen  ,   (1)清华大学高等研究中心，北京  100084; (2)清华大学物理系，原子分子纳米科学教育部重点实验室，北京  100084
Published: December 2020

Action integrals of the periodic orbits of non-integrable (chaotic) two-dimensio nal system of Henon-Heiles were analyzed to show simple linear relations. This e nables us to obtain by extrapolation all the action integrals of any periodic or bits and at any energies from very few arbitrary action integrals. Based on this property, a very simple and easy semiclassical quantization algorithm by numeri cal arithmetics was proposed for low_energy excitations which are classically ch aotic. The result is good agreement with that obtained by the exact quantal met hod.
Dynamics and statistics in few-body hard-ball systems
Authors: Fu Wen-Yu  , Hou Xi-Miao  , He Li-Xia  , Zheng Zhi-Gang  ,   北京师范大学物理系，北京  100875
Published: December 2020

The dynamic and statistical properties of several hard balls restricted in a box are studied.The collision distribution in configuration space is main object of the research. Numerical simulations indicate that the distribution function is uniform (horizontal line) when the radius of balls is very small. This uniform p art decreases with increasing size of the balls, and a double-peak distribution is found when the radius exceeds a critical value. Brownian motion is simulated by using hard-ball systems. It can be found that the mean square displacement is proportional to the square of time, i.e., the transport process is dominated by ballistic transport, rather than a diffusion behavior.
Robust finite time synchronization of chaotic systems
Authors: Gao Tie-Gang  , Chen Zeng-Qiang  , Yuan Zhu-Zhi  ,   (1)南开大学信息技术科学学院自动化系，天津  300071; (2)南开大学信息技术科学学院自动化系，天津  300071;南开大学软件学院，天津  300071
Published: December 2020

In this paper, a robust finite time fast sliding mode controller is presented fo r a class of chaotic synchronization. Using the fast sliding mode controller, ma ny chaotic systems can achieve synchronization with identical response system th rough state transformation, and Chen's system and hyperchaos system of 4th_order cellular neural network are used to demonstrate the obtained results. The resul ts show that the controller possesses the advantage of fast response and robustn ess.
Impact of stress on the thermodynamic properties of ferroelectric films within the transverse Ising model
Authors: Tao Yong-Mei  , Jiang Qing  , Cao Hai-Xia  ,   (1)苏州大学物理系,苏州  215006; (2)苏州大学物理系,苏州  215006;常熟理工学院物理系,常熟  215500
Published: December 2020

The thermodynamic properties of ferroelectric thin films are investigated within the framework of the transverse Ising model. A two-dimensional in-plane stress is introduced into the Hamiltonian of the system, and is supposed exponentially decreasing from the interface between the substrate and the film to the surface of the film. It is demonstrated that the compressive stress is benefitial to the polarization and shifts the Curie temperature to higher temperatures, but the tensile stress has the inverse influence on the Curie temperature and polarization. Besides, it is also shown that the diffusive length greatly affects the thermodynamic properties of the film.
Spectrum analysis of voltage noise of moving vortex lattice and dynamic phase transition
Authors: Xu Hai-Ying  , Zhao Zhi-Gang  , Liu Mei  ,   东南大学物理系,南京  210096
Published: December 2020

Using Langevin molecular dynamics method, we have studied the voltage noise spectrum generated by current-driven vortices as a function of the magnetic field an d current. It is found that the broad band noise (BBN) at low frequencies decrea ses with increasing magnetic field, it decreases at the magnetic field near th e vortex dynamic transition field FP， and the Lorentze narrow ba nd noise (NBN) at high frequencies appears. As the magnetic field increases near the melt ing field Fm, the NBN peak goes up and shifts towards higher freq uencies. In the elastic motion region of vortices with strong driving currents, NBN exhib its the washboard-like shape. This behavior arises from the periodic modulation of the translational velocity of vortices, suggesting that there is a Bragg gla ss phase with the translation order in the vortex lattices of the layered superc onductors.