“东北野武”通过精心收集,向本站投稿了8篇基于图书馆服务质量评价的数学模型分析,以下是小编精心整理后的基于图书馆服务质量评价的数学模型分析,希望对大家有所帮助。
- 目录
篇1:基于图书馆服务质量评价的数学模型分析
基于图书馆服务质量评价的数学模型分析
图书馆服务质量评价标准随着信息时代的发展而产生了显著的变化,以SERVQUAL评价模式为基础寻求更完善的.图书馆评价模式LibQUAL+,是当今图书馆服务质量评价标准发展的趋势.通过运用模糊数学中模糊综合评判法,对因素集权重进行分析和数学模型的建立,并列举一些实例数据,最终量化出某图书馆服务质量评价结果.
作 者:李艳梅 Li Yanmei 作者单位:中国科学技术大学图书馆,合肥,230052 刊 名:情报杂志 PKU CSSCI英文刊名:JOURNAL OF INFORMATION 年,卷(期):2006 25(4) 分类号:G35 关键词:图书馆服务质量 LibQUAL+ 数学模型 评价篇2:高中生物有关数学模型问题分析
高中生物有关数学模型问题分析
1 高中生物教学中的数学建模
数学是一门工具学科,在高中的物理与化学学科中广泛的应用。由于高中生物学科以描述性的语言为主,学生不善于运用数学工具来解决生物学上的一些问题。这些需要教师在平时的课堂教学中给予提炼总结,并进行数学建模。所谓数学建模(Mathematical Modelling),就是把现实世界中的实际问题加以提炼,抽象为数学模型,求出模型的解,验证模型的合理性,并用该数学模型所提供的解答来解释现实问题,我们把数学知识的这一应用过程称为数学建模。在生物学科教学中,构建数学模型,对理科思维培养也起到一定的作用。
2 数学建模思想在生物学中的应用
2.1 数形结合思想的应用
生物图形与数学曲线相结合的试题是比较常见的一种题型。它能考查学生的分析、推理与综合能力。这类试题从数形结合的角度,考查学生用数学图形来表述生物学知识,体现理科思维的逻辑性。
例1:下图1表示某种生物细胞分裂的不同时期与每条染色体DNA含量变化的关系;图2表示处于细胞分裂不同时期的细胞图像。以下说法正确的是( )
A、图2中甲细胞处于图1中的BC段,图2中丙细胞处于图1中的DE段
B、图1中CD段变化发生在减数Ⅱ后期或有丝分裂后期
C、就图2中的甲分析可知,该细胞含有2个染色体组,秋水仙素能阻止其进一步分裂
D、图2中的三个细胞不可能在同一种组织中出现
解析:这是一道比较典型的数形结合题型:从图2上的染色体形态不难辨别甲为有丝分裂后期、乙为减Ⅱ后期和丙为减Ⅱ中期;而图1中的AB段表示的是间期中的(S期)正在进行DNA复制的过程,BC段表示的是存在姐妹染色单体(含2个DNA分子)的染色体,DE 段表示的是着丝点断裂后的只含1个DNA的染色体。此题的答案是B。
2.2 排列与组合的应用
排列与组合作为高中数学的重要知识。在减数分裂过程中,减Ⅰ分裂(中期)的同源染色体在细胞中央的不同排列方式,在细胞两极出现不同的染色体组合,最终形成不同基因组成的配子,这是遗传的分离定律与自由组合定律细胞学证据。同样,遗传信息的传递与表达过程中,也涉及到碱基的排列与密码子的组合方式。因此,教师在教学中,从具体的实例出发,结合排列与组合知识,解决生物学上的一些疑难问题。
例2:果蝇的合子有8个染色体,其中4个来自母本(卵子),4个来自父本(精子)。当合子变为成虫时,成虫又产生配子(卵子或精子,视性别而定)时,在每一配子中有多少染色体是来自父本的,多少个是来自母本的?( )
A、4个来自父本,4个来自母本
B、卵子中4个来自母本,精子中4个来自父本
C、1个来自一个亲本,3个来自另一亲本
D、0、1、2、3或4个来自母本,4、3、2、1或0来自父本(共有5种可能)
解析:染色体在形成配子时完全是独立分配的,因为在同源染色体发生联会后,二价体在赤道板上的排列方位是完全随机的,因此每个配子所得到的4个染色体也是完全随机的。每个配干所得到的一套染色体有可能是五种组合中的一种,实际上每种组合又会有不同的情况。如将这4对染色体分别命名为 m1(母源来的第一染色体)以及 m2、m3、m4和p1(父源来的第一染色体)、p2、p3和p4。那么上述情况下,配子有可能是:m1 m2 m3 m 4;m1 p2 p3 p4;m2 p1 p3 p4;m3 p1 p2 p4 ……p1 p2 p3 p4。因此,当我们不仅考虑数量,而且也考虑到质量时,4对染色体的配子组合数应为24=16。在只考虑数量时,此题答案为D。
2.3 数学归纳法的应用
在平时的教学中,教师要善于从已有的知识过渡到新知识,诠释新知识与已有知识的内在联系与区别,以利于学生进行同化学习。教师通过对一些实例分析、协助学生归纳出一般的规律并构建数学模型。学生通过上位学习,把数学中的相关知识融入到生物学科中来,做到举一反三。然后通过运用新规律,进一步检验、巩固新知识,并实现知识的正迁移。
例3:若让某杂合子连续自交,能表示自交代数和纯合子比例关系是( )
解析:假设此杂合子的基因型为Aa、采用数学归纳法对杂合子自交的后代概率进行推算(一般学生都会)。自交第一代的杂合子概率为1/2,纯合子的概率为1/2(显、隐性纯合子),自交第二代的杂合子概率为(1/2)2……自交第N代的杂合子概率为(1/2)N,而纯合子则为1-(1/2)N,然后再构建数学曲线模型。本题答案为D。
2. 4 概率的计算
高中生物的遗传机率的计算是教学的难点,教师通过对具体实例的解析,协助学生构建概率相加与相乘原理。比如:分类用概率相加原理;分步用概率相乘原理。
例4:A a B b×A a B B相交子代中基因型a a B B所占比例的计算。
解析:因为A a×A a相交子代中a a基因型个体占1/4,B b×B B相交子代中B B基因型个体占1/2,所以a a B B基因型个体占所有子代的1/4×1/2=1/8。[由概率分步相乘原理,可知子代个别基因型所占比例等于该个别基因型中各对基因型出现概率的乘积]。
2. 5 生态系统的数学模型
生态学的一般规律中,常常求助于数学模型的研究,理论生态学中涉及到大量的数学模型构建的问题。在高中生物学中有种群的动态模型研究,如:“J”与“S”型曲线;另外,种间竞争及捕食的数学模型等等。
例5:在实验室中进行了两类细菌竞争食物的实验。在两类细菌的混合培养液中测定了第Ⅰ类细菌后一代(即Zt+1)所占总数的百分数与前一代(即 Zt)所占百分数之间的关系。在下图中,实线表示观测到的Zt+1和Zt之间的关系,虚线表示Zt+1=Zt时的情况。从长远看,第Ⅰ类和第Ⅱ类细菌将会发生什么情况?( )
A、第Ⅰ类细菌与第Ⅱ类细菌共存
B、两类细菌共同增长
C、第Ⅰ类细菌把第Ⅱ类细菌从混合培养液中排除掉
D、第Ⅱ类细菌把第Ⅰ类细菌从混合培养液中排除掉
解析:两类细菌在实验条件下,同一环境中不存在其他生物因素的作用时,竞争的结果是一种生物生存下来,另一种被淘汰现象。从上述图形的对角线 (虚线)上可以看出在虚线上任取一点作横坐标与纵坐标得到的是相同的数据,这说明了同种细菌后一代与前一代在混合培养液中的比例没有变化,说明它们之间是共存的,不是竞争关系。而实线位于虚线下方,用同样的方法不难得出,第Ⅰ类细菌的后一代含量比前一代含量减少了,在竞争中是劣势的种群。本题答案为D。
2.6 生物作图及曲线分析
生物作图在近些年的高考试题中经常出现,对能力要求比较高,要求学生会从数形中提炼出有用的信息。教师在平时的教学中,可以结合生物学知识解决一些难以理解的、比较抽象的图形和曲线。
例6:有一种酶催化反应P+Q→R,右图中的实线表示没有酶时此反应的进程。在t1时,将催化此反应的酶加入反应混合物中。右图中的哪条线能表示此反应的真实进程(图中[P]、[Q]和[R]分别代表化合物P、Q和R的浓度)?( )
A、Ⅰ B、Ⅱ C、Ⅲ D、Ⅳ E、Ⅴ
解析:A、B和D都不对。酶作为催化剂不能改变化学反应的平衡点即平衡常数(Keq=[R] /[P][Q]),只能缩短达到平衡的时间。图中实线平行于横坐标的线段延长相交于纵坐标的那个交点即为此反应的Keq。Ⅰ,Ⅱ和Ⅳ三条线显然都改变了此平衡点。C正确:线Ⅲ反映了加酶后缩短了达到平衡点的时间而不改变原反应的平衡点。E不对:曲线Ⅴ从t1至平衡前的线段不符合加酶后的真实进程。
3 生物教学中数学建模的意义
高中生物学科中涉及到的数学建模远不及这些,限于篇辐,本文在此只作简要的归纳。我们知道,实际问题是复杂多变的,数学建模需要学生具有一定的探索性和创造性。在教学过程中,充分的运用它能很好的解决一些生物学实际问题,使学生对生物学产生更大的兴趣。生命科学作为一门自然科学,其理论的深入研究必定会涉及到很多数学的问题。在生物学教学中,构建数学模型正是联系数学与生命科学的桥梁。如何将生物学理论知识转化为数学模型,这是对学生创造性地解决问题的能力的检验,也是理科教育的重要任务。
学好高中生物的三种常用方法
生物学科虽然在中学课程中不是主要学科,但是生物学是二十一世纪最有发展前景的学科之一,它作为自然科学领域的带头学科,将会有极大的发展空间;另一方面,人类社会在新世纪面临的人口、粮食、资源、环境和健康问题将更加突出,而这些问题的解决,都将在很大程度上依赖于生物科学的进步;而且生物学在高考理科综合试卷中占有举足轻重的地位。因此,我们没有理由不学好生物。下面是清华大学附属中的老师对学好高中生物学的一些建议:
1.掌握基本知识要点,“先记忆,后理解”
与学习其它理科一样,生物学的知识也要在理解的基础上进行记忆,但是,高中阶段的生物学还有着与其它理科不一样的特点。
对于大家学习了许多年的数学、物理、化学来说,这些学科的一些基本思维要素同学们已经一清二楚,比如:数学中的未知数X、化学中的原子、电子以及物理中的力、光等等。而对于生物学来说,同学们要思考的对象即思维元素却是陌生的细胞、组织、各种有机物和无机物以及他们之间奇特的逻辑关系。因此同学们只有在记住了这些名词、术语之后才有可能掌握生物学的逻辑规律,既所谓“先记忆,后理解”。
2.弄清知识内在联系,“瞻前顾后”、“左顾右盼”
在记住了基本的名词、术语和概念之后,同学们就要把主要精力放在学习生物学规律上来了。这时大家要着重理解生物体各种结构、群体之间的联系,也就是注意知识体系中纵向和横向两个方面的线索。
如:关于DNA,我们会分别在“绪论”、“组成生物体的化合物”和“生物的遗传和变异”这三个地方学到,但教材中在三个地方的论述各有侧重,同学们要前后联系起来思考,既所谓“瞻前顾后”。又如:在学习细胞的结构时,我们会学习许多细胞器,那么这些细胞器的结构和功能有何异同呢?这需要大家做了比较才能知道,既所谓“左顾右盼”。
3.深刻理解重点知识,读书做到“六个W”
对于一些重点和难点知识,大家要深刻理解。如何才能深刻理解呢?大家读书时要时时思考“六个W”。这六个W分别是:
Who—→谁或什么结构
What—→发生了什么变化或有什么
How—→怎样发生的
When—→什么时间或什么顺序
Where—→在什么场所或结构中发生的
Why—→为什么会发生这样的变化
大家在思考中经常将这六个W连起来思考肯定会有不小的收获。除了上述三点以外,同学们还要坚持在学习中不断探索适合自己的学习方法。用辛勤的汗水和科学的方法一定可以换回优异的生物学习成绩!
篇3:高校图书馆的服务质量刍议
高校图书馆的服务质量刍议
当前人们越来越重视图书馆的服务质量.对高校图书馆服务现状进行了分析,指出了在服务质量上欠缺的几个方面,既有图书馆员工方面的`,也有读者的种种因素.探讨了如何提高图书馆服务质量的对策.
作 者:罗林 作者单位:罗定职业技术学院图书馆,广东省罗定市,527200 刊 名:河北科技图苑 英文刊名:HEBEI SCI-TECH LIBRARY JOURNAL 年,卷(期):2009 22(5) 分类号:G252 关键词:图书馆 院校图书馆 读者服务 服务质量篇4:服务质量英文自我评价
I July 20, 20xx - October 31, 20xx to Guangzhou City Phoenix hotel internship, this time I have a great harvest. Hotel service is a mixture of tangible products and intangible services, the hotel service quality evaluation criteria is the guest's “satisfaction.” Guests in the buyer's market should take the customer demand as the starting point of the marketing work, the lobby on behalf of the hotel and guests to meet the needs of the guests of the hotel services to accept complaints from customers to solve customer problems, is the hotel's nerve center. It is based on these, the status and role of the lobby is particularly important.Although the front lobby is not the hotel's main business sector, but the hotel's market image, service quality and even management level and operating efficiency has a crucial impact. The Front Office is the crowning touch to hotel management. Through this in the Phoenix hotel close to four months of internship, I benefit greatly. The hotel is tantamount to a microcosm of society. The internship is undoubtedly for the near future into the community I provide an important opportunity.
1, to improve communication skills: As a front desk receptionist, as the hotel front-line staff, and the guests contact is face to face, is the most direct. Often receptionist word can affect the guests on the hotel's overall impression, and even affect the mood of the guests all day. How to make your own language so that guests hear comfortable, happy to hear, as a front desk receptionist must learn the course. Of course, communication is not limited to the guests, but also between colleagues, or even to the higher level. People can not help but not have emotional volatility, but this emotional fluctuations tend to affect the mood of others. How to adjust their own mentality, with the best attitude to face the guests, the face of colleagues and even higher, how to bring someone the best smile, every day I seriously think about the problem. In this internship, I not only in communication skills have been improved, but also learned how to adjust the mentality of self.
2, emergency response capacity to improve: work in the front desk, every day must be ready for battle. Because as a front desk receptionist, every day to receive different guests, in the face of different events. Guests can not help some of the guests will not be polite, and even the receptionist will be outrageous. Faced with this situation, how to appease the feelings of the guests, but also to protect the interests of the hotel and its own security, for me is another test.
3, the ability to work independently improved: Through this internship, I am deeply aware of the need to learn their own ability to do this must be their own reason. Only to develop their own independent ability to work in progress. in Work, there are problems, do not understand should be bold to ask colleagues, rather than pretend to understand. Work independently, gain experience, and finally get the most suitable for their own things.
4, service awareness: as a front desk receptionist, always represents the hotel. Whether in the workplace, or walking on the road, as long as the uniforms of the hotel should always have to provide guests with the best service mean. We are the angel of the City of Smiles, all for the guests, for the guests of all, for all guests.
(B) practical experience
1, their own shortcomings and shortcomings: Through this internship, I re-see their own shortcomings and shortcomings. In the language ability is still not very fluent in communication with the guests. Daily visitors to the Phoenix Hotel are mainly domestic guests as well as Japanese guests.However, during the Canton Fair, the hotel is the main source of foreign guests. Because of their ability to speak English is not very good, resulting in communication barriers with the guests. And because of their own lack of work experience in the hotel, leading to work should not appear wrong, for the colleagues to bring a lot of inconvenience. On the other hand, at work, some of my shortcomings is revealed. Such as not careful enough work, not enough to accept criticism of colleagues and so on. But through this nearly four months of exercise, I have been in constant corrections.
2, employment prospects According to incomplete statistics, there are currently more than 9,000 hotels across the country, the hotel talent gap of more than 100,000. And now most of the hotel's grass-roots staff are mostly secondary or tertiary education. I think the current lack of hotel industry is still highly educated professionals. However, even with a high degree, is still unable to become a manager. As a manager or must have many years of work experience. Among them, front-line work experience is very important. Therefore, as a graduate of the college students, it is absolutely not a master, must be prepared to accept the challenge.
(C) internship ideas and recommendations
1, idea: this internship gives us a good opportunity to understand the society. Is that we really into the community before an important step. Law of the jungle has been unable to change the survival of the principle. Want to be successful, you must work harder than others. The internship faced a lot of problems that had never been encountered before. Such as interpersonal problems, guest relations, poor mental state and other issues. But through this nearly four months of learning and improvement, I both in the psychological or ideological have been a lot of progress.
篇5:服务质量英文自我评价
The internship has been completed, through this time internship, I got a comprehensive exercise, internship process also made me complete a student, in the course of social transition, improve their independence, get the The use of knowledge in this area capacity, for the future to lay a solid foundation to take the community.
In these days I did learn a lot of things: In addition to learning Chinese food service procedures and skills, Cantonese characteristics and types of classroom can learn something, but also learn some class is difficult to learn To the things: how to handle their own interests and the interests of the hotel, how to deal with interpersonal relationships between colleagues, how to adjust their attitude, let me know that as a waiter should have a strong sense of service. In a chat with a department manager, the manager mentioned the sense of service, I very much agree with his view: “Service awareness is not only requires the waiter to provide quality services to the guests the idea and desire, and should also have their colleagues the same ”Yes, this is the“ sense of service, ”the real meaning, this is a true manifestation of the quality of the waiter. Making me from a fledgling students, gradually familiar with the hotel's organizational structure, personnel relations, corporate culture, but also I slowly adapt to this society.
I always proud to be able to do a service staff, because we are helping others every day, and guests here is a surprise to us, and we also found in the guests pleasant surprise in the rich life. We may not have a lot of money, but we will not be poor, because we are intelligent, informative, responsible, helpful, loyal and trustworthy, and we have a loving family, all of which , It constitutes our life today. In fact, the rich life is not hard to find, it is for us in every surprise for others. I am also pleased that the hotel staff are so warm and friendly, they are not because we are interns and indifferent to our blunt, while in fatigue, the colleagues of a sweet smile, a more common “Hard” will make people moved, it seems that employees are most able to understand their feelings, because they can stand in the staff point of view of their own problems, because they are talking about “the hearts of ordinary people.
篇6:航空重力测量数学模型及其测量精度分析
航空重力测量数学模型及其测量精度分析
基于数学和分析力学角度分别推导了航空矢量重力测量的数学模型,得到了一致的模型公式;给出了矢量模型的3个分量形式,其中垂直方向的分量就是标量重力测量的数学模型;简要介绍了我国研制成功的航空标量重力测量系统CHAGS的数据处理的过程,分析了标量重力测量中测线交叉点和重复测线的重力异常的`精度;根据实测数据计算的结果表明:测线交叉点重力异常不符值的标准差约为5×10-5ms-2左右,重复测线的内符合精度优于5×10-5ms-2,达到了预期的要求.
作 者:王丽红 张传定 王俊勤 聂国兴 WANG Li-hong ZHANG Chuan-ding WANG Jun-qin NIE Guo-xing 作者单位:王丽红,WANG Li-hong(信息工程大学,测绘学院,河南,郑州,450052;61365部队,天津,300142)张传定,ZHANG Chuan-ding(信息工程大学,测绘学院,河南,郑州,450052)
王俊勤,聂国兴,WANG Jun-qin,NIE Guo-xing(61365部队,天津,300142)
刊 名:测绘科学技术学报 PKU英文刊名:JOURNAL OF GEOMATICS SCIENCE AND TECHNOLOGY 年,卷(期):2008 25(1) 分类号:P223 关键词:航空矢量重力测量 测线交叉点 重复测线 重力异常篇7:VRP的数学模型及算法分析
VRP的数学模型及算法分析
随着我国物流业的飞速发展,车辆运输路线规划对于降低物流成本显得越来越重要.对车辆路线问题(VRP)进行了数学建模,总结了国内外的研究状况,并指出了今后的`研究方向.
作 者:聂艳芳 Nie Yan-fang 作者单位:太原旅游职业学院,山西,太原,030032 刊 名:山西电子技术 英文刊名:SHANXI ELECTRONIC TECHNOLOGY 年,卷(期):2010 ”“(1) 分类号:N945.12 TP311.11 关键词:车辆路线问题(VRP) 精确算法 启发式 亚启发式篇8:浅谈细节提升高校图书馆流通服务质量
浅谈细节提升高校图书馆流通服务质量
现代化技术的应用已在各高校图书馆形成一定的规模,图书馆各种服务功能的发挥要求图书馆工作从实质上转入一种不断深化的.细节服务.本文结合实际工作讲述了高校图书馆流通服务工作应从细节入手,把”以人为本“深入到服务的每一个环节中,让流通服务工作更加贴进读者,以良好的职业道德形象,提升图书馆的服务水平与服务质量.
作 者:刘江霞 作者单位:山东胜利职业学院图书馆 刊 名:中国科技财富 英文刊名:FORTUNE WORLD 年,卷(期):2010 ”“(8) 分类号:G25 关键词:高校图书馆 ”以人为本\" 职业★ 服务质量工作总结
★ 服务质量管理制度
★ 党性分析评价制度
基于图书馆服务质量评价的数学模型分析(精选8篇)




