检索结果-南通市图书馆

MOdELING ANd OPTIMIZATION OF CYCLIC HOIST SCHEdULES IN AN ELECTROPLATING LINE

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Systems Science and Systems Engineering 2016年第4期25卷 469-490页

作者： Ahmed Nait-Sidi-moh Adnen EI-Amraoui Universite de Picardie Jules Verne Laboratoire des Technologies lnnovantes 02100 ST Quentin France Universite d'Orleans Laboratoire PRISME 63 av. de Lattre de Tassigny 18020 Bourges France

This paper deals with the modeling, analysis and optimization of a specific kind of real industrial problems. This class of problems is known in the literature as Cyclic Hoist Scheduling Problem （CHSP）. In such class of problems, several jobs have to flow through a production line according to an ordered bath sequence. The CHSPs appear in the manufacturing facilities to achieve a mass production and to search a repetitive sequence of moves for the hoist. In this paper, we develop P-Temporal Petri Net models to represent the behavior and validate certain qualitative properties of the basic production line. Afterward, complex configurations of the production line are modeled and their properties such as reachability of desired functioning （cyclic operation）, deadlock-free, resource sharing and management are checked and validated. A mathematical analysis and a simulation study of all proposed Petri net models are carried out using mathematical fundaments of Petri nets and a Visual Object Net ＋＋ tool. The second part of the paper deals with the development of a mixed integer linear programming models to optimize processing of each line configuration. Optimal manufacturing plans of the studied system with cyclic processing sequences are defined and the feasibility of optimal cyclic scheduling of each configuration is proved.

关键词： Manufacturing lines processing tanks cyclic scheduling Petri nets mixed integer linear programming modeling optimization

Tanzania’s Foreign Policy Towards Kenya Since 2010

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tanzania’s Foreign Policy Towards Kenya Since 2010

作者： rashi.,rashi. moh’d 华中师范大学

学位级别：硕士

长期以来,坦桑尼亚一是东非外交事务的前沿阵地,并在非洲东部地区地区发挥了领导性作用。自2004年以来,坦桑尼亚的外交政策逐渐由解放外交转向经济外交。坦桑尼亚对肯尼亚的外交政策对两国人民生活的各个方面都产生了影响,其中包括政治... 详细信息

长期以来,坦桑尼亚一是东非外交事务的前沿阵地,并在非洲东部地区地区发挥了领导性作用。自2004年以来,坦桑尼亚的外交政策逐渐由解放外交转向经济外交。坦桑尼亚对肯尼亚的外交政策对两国人民生活的各个方面都产生了影响,其中包括政治影响、社会影响和经济影响。坦桑尼亚的外交政策主要体现在它会向肯尼亚公司的投资、贸易和安全做出指示。坦桑尼亚的外交政策为巩固睦邻政策、促进非洲统一、加快工业化进程与经济发展指明了方向。在东非国家中,肯尼亚是坦桑尼亚的重要合作伙伴之一,因为与其他东非国家相比,肯尼亚对坦桑尼亚的贸易额和投资额要高出许多。坦桑尼亚政府制定了法律和法规来规范与肯尼亚的跨境贸易,并为肯尼亚政府和私人投资者在坦桑尼亚的投资创造了有利的环境。坦赞两国政府都致力于解决其经济问题,进一步促进两国经济的发展。坦桑尼亚对肯尼亚的外交政策将东非地区的的工业化和区域建设作为重中之重。坦桑尼亚的外交政策积极解决了肯尼亚不安全的困境,并与肯尼亚携手共同解决与肯尼亚部落、野生生物走私和矿物开采问题有关的犯罪。因此,坦桑尼亚对肯尼亚的外交政策不仅为该地区的经济发展做出了巨大贡献,也为维护东非地区国家之间的团结、和平与安全做出了巨大贡献。

关键词：外教政策双边关系经济发展

Bibliometric analysis of global research output on antimicrobial resistance in the environment(2000-2019)

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Global Health Research and Policy 2020年第1期5卷 153-163页

作者： Waleed M.Sweileh Ahmad moh’d Mansour department of Physiology Pharmacology/ToxicologyCollege of Medicine and Health SciencesAn-Najah National UniversityNablusPalestine Business Faculty Al-Balqa Applied UniversityAmmanJordan

Background:Antimicrobial resistance(AMR)is a global health threat that requires a“One Health”*** the One Health triad,the environmental component is the most dynamic and most ***,the objective of the current study was to assess and analyze global research activity on AMR in the ***:This was a bibliometric descriptive study of publications on AMR in the *** were retrieved using SciVerse Scopus for the study period from 2000 to *** search query was developed using terms and phrases related to the *** retrieved publications were analyzed for specific bibliometric indicators including annual growth,citation analysis,key players,research output for each world regions,research themes,and occurrences of different drug classes of *** maps including research collaboration were created using VOSviewer *** Hirsch(h)index was used to assess scientific ***:There were 2611 research articles based on the implemented research *** retrieved documents had an average of 22 citations per document and an h-index of *** annual number of publications showed a steep increase from 2011 to *** major research themes in the field were(1)dissemination and abundance of antibiotic-resistant genes and(2)detection of bacterial strains or antibiotic residues in various environmental *** bulk of the retrieved articles(n=899;34.4%)originated from the European *** led with 598(22.9%)*** of the top 10 active institutions were in *** top 10 active countries had relatively inadequate international research *** most commonly encountered antibiotic drug classes in the retrieved articles were penicillin/cephalosporin(n=1152 occurrences).The most frequently encountered pathogen in the retrieved publications was ***(n=666).The Science of the Total Environment journal was the most prolific journal with 139(5.3%)***

关键词： Antimicrobial resistance Environment Research activity One health

Experimental Investigation of “Scale Influence on Plastic Rotational Capacity of Reinforced Concrete Beams”

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Engineering（科研） 2016年第4期8卷 196-203页

作者： moh’d El Khatieb department of Civil Engineering Zarqa University Zarqa Jordan

The importance of the geometrical effect in practical design has been evaluated, showing that an overestimation of the actual member rotation is very likely if the available rotation capacity is based on the evaluation of the behavior of the reference members within a limited size range. The increase of ductility with decreasing member size has been interpreted in fracture mechanics of reinforced concrete. In fracture mechanics it’s seen that beams with higher dimensions are brittle, while those with small dimensions are ductile, so it’s important here to clarify if the same material and design concepts can be applied for reinforced concrete beams with different scales. Three point bending test was executed on 20 reinforced concrete beams varying scale and slenderness ratio (where steel ratio being kept constant). The experimental results obtained varying beam slenderness and beam depth will be used to analyze the structural response for a practical construction, taking in consideration the size effect, these beams are normally designed in such a way that the distribution of their internal forces over the transversal section has been calculated as per elastic beam theory, while the beam dimension will be designed as per the ultimate limit state to obtain a ductile response of the reinforced concrete beams which is necessary to guarantee the structural safety [1].

关键词： Size Effect Plastic Rotation Reinforced Concrete Elastic Beam Theory Fracture Mechanics

Main Factors Influencing Stress for Employees:A Study of Azizi Bank Kabul,Afghanistan

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Main Factors Influencing Stress for Employees:A Study of Azi...

作者： moh Shoaib Naib Khil 河北地质大学

学位级别：硕士

Stress has become a worldwide phenomenon, which happens in various procedures in every organization. Nowadays, employees at the workplace generally work more extended time than before, as the responsibilities increase the tension and stress increase and it requires to employ themselves even more energetically to encounter increasing expectations about workplace activities. Omolara (2018) described workplace stress as psychological and physical responses that happen in an individual as an outcome of existence unable to cope with the stresses being made. According to Swanepoel (2017), business-related to pressure and theme has expanded considerably in the region of word-related well-being throughout the four decades. These creators were of the feeling that the world, particularly the cosmos of work and business, has gotten gradually subject to rapid altering powers like prolonged competition, the weight of value, development, and an expansion in the movement of doing business. The requests on representatives developed similarly significantly, and this put pressure on workers. Aside from the stress that arises from the work situation, different fountains of stress could identify with discrete influences, for example, relatives with others and operation of free time. Stress can next be depicted as the unfavorable mental and physical responses that happen in a person because of their powerlessness to adapt to the requests being made on the person in question. Griffen, (2018), That is pressure from special requirements on an individual. It is noticed that stress isn't downright awful;it is an opportunity when it offers expected addition. In any circumstance, whatever its tendency, it typically starts when individuals are put in a workplace incongruent with their work style and or personality. It becomes disturbed when people determine that they have or can practice little command over it.

关键词： career,interpersonal,psychological,everything,motivation,eating,questionnaire,competence,items,anxiety,

Evidence for structural phase transitions and large effective band gaps in quasi-metallic ultra-clean suspended carbon nanotubes

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Nano Research 2013年第10期6卷 736-744页

作者： Shun-Wen Chang Rohan dhall moh Amer Kentaro Sato Riichiro Saito Stephen Cronin department of Physics and Astronomy University of Southern California Los Angeles CA 90089 USA department of Electrical Engineering University of Southern California Los Angeles CA 90089 USA department of Chemistry University of Southern California Los Angeles CA 90089 USA department of Physics Tohoku University Sendai 980-8578 Japan

We report evidence for a structural phase transition in individual suspended metallic carbon nanotubes by examining their Raman spectra and electron trans- port under electrostatic gate potentials. The current-gate voltage characteristics reveal anomalously large quasi-metallic band gaps as high as 240 meV, the largest reported to date. For nanotubes with band gaps larger than 200 meV, we observe a pronounced M-shape profile in the gate dependence of the 2d band （or G＇ band） Raman frequency. The pronounced dip （or softening） of the phonon mode near zero gate voltage can be attributed to a structural phase transition （SPT） that occurs at the charge neutrality point （CNP）. The 2d band Raman intensity also changes abruptly near the CNP, providing further evidence for a change in the lattice symmetry and a possible SPT. Pronounced non-adiabatic effects are observed in the gate dependence of the G band Raman mode, however, this behavior deviates from non-adiabatic theory near the CNP. For nanotubes with band gaps larger than 200 meV, non-adiabatic effects should be largely suppressed, which is not observed experimentally. This data suggests that these large effective band gaps are primarily caused by a SPT to an insulating state, which causes the large modulation observed in the conductance around the CNP. Possible mechanisms for this SPT are discussed, including electron-electron （e.g., Mott） and electron-phonon （e.g., Peierls） driven transitions.

关键词： carbon nanotube Raman spectroscopy phase transition bandgap energy

Review on 209 Congenital Cysts of the Floor of the Mouth

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

口腔医学研究 2005年第6期21卷 682-685页

作者： moh’d Jamal Al-Sharif department ofOral and Maxillofacial Surgery School and Hospital ofStomatology Wuhan UniversityChina 430079

目的:比较1980～2005年在武汉大学口腔医院治疗的89位中国病人和在约旦医院治疗的120位病人三型口底囊肿的临床特点.方法:回顾性分析皮样囊肿、表皮样囊肿和畸胎样囊肿患者的年龄、性别、种族,以及比较两组患者的囊肿位置、大小、就诊... 详细信息

目的:比较1980～2005年在武汉大学口腔医院治疗的89位中国病人和在约旦医院治疗的120位病人三型口底囊肿的临床特点.方法:回顾性分析皮样囊肿、表皮样囊肿和畸胎样囊肿患者的年龄、性别、种族,以及比较两组患者的囊肿位置、大小、就诊时间、手术治疗方法和复发率等方面的差别.结果:209例口底囊肿中,93例(44.5%)男性,116例(55.5%)女性.皮样囊肿66例(31.6%)、表皮样囊肿115例(55%)、畸胎样囊肿28例(13.4%).皮样囊肿、表皮样囊肿多见于头3个10岁年龄组,20～29岁高发,而畸胎样囊肿高好发于10岁以前.约90%的患者无自觉症状.发病后6个月以内就诊者,第1组(43.8%)明显少于第2组(80%).这些先天性囊肿常发生在口底中部.就诊时第1组中囊肿直径大于3 cm 者达48.3%,而第2组中囊肿直径大于3 cm 者仅11.7%.第1组中经口外进路切除病变占58.4%,而第2组为41.7%.141例随访病例的术后复发25例,复发率是17.7%.结论:两组口底囊肿有类似的临床特点,其中表皮样囊肿较常见,畸胎样囊肿的发病年龄较小.手术切除不彻底可导致病变复发.

关键词：皮样囊肿表皮样囊肿畸胎样囊肿

Strata--bound Anorthites in the d achang Sn-Polymetallic Ore Field,Guangxi,China

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Chinese Journal Of Geochemistry 1993年第3期12卷 261-269页

作者：潘家华 G.C.AMSTUTZ G.moh Institute of Mineral deposits Chinese Academyof Geological SciencesBeijing100037 Mineralogish-Petrographisches

From the petrological study of ore-hosting focks which contain large anorthits crystals and the occurrence and chemical composition of anorthites and related minerals,the authors consider that the large anorthite crystals are of authigenic origin. The distribution characteristics of anorthites,i.e.,they are distributed along the bedding and structurally weak zones but not restricted to synsedimentary slump structures,and the relationship for some elements between anorthites and other minerals indicate that anorthites have resulted from reaction of circulating alkaline solutions rich in Al and Si with carbonated during the Indosinian *** results of this work suggest that the association of authigenic anorthites with bedded orebodies in the dachang ore field may be the evidence that the mineralization is related to circulating underground hot waters.

关键词：钙长石自生作用锡矿床铝成矿作用

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A New Energy Concept

Journal of Energy and Power Engineering 2016年第2期10卷 116-120页

作者： Khaled (moh'd Khalaf) Suleiman Ainobani Safety Engineer Jordan Petroleum Refinery Company Amman 11181 Jordan

According to the uncertainties in the results and the wide diversity of how to approach the subject, a new concept for energy is proposed： Energy is an exchange between two different concentrations, the concentration of time in space outside what we call matter and the concentrated phase of time in matter space which is the matter itself. The concept of motion for energy is replaced by time-space interactions with time taken as solid matter. Motion enhances the exchange between the mass and its surrounding time in space, annihilation and creation are special forms of this exchange. during the motion of a mass, it increases as a result of this dissolution. Time concentration in Fock space is responsible for the collision phenomena in physics. In this paper, a new mathematical operator （the equal operator） is introduced.

关键词： Time mass space.