Design and Implementation of Jinkai Hotel Management System

酒店住宿业是为游客提供食宿、娱乐、休闲的场所，对于整个酒店行业的经营状况起到决定性的作用，因而在酒店管理上有效地提高酒店的运营状况至关重要。本文探讨如何实现一个酒店管理系统，对酒店的经营状况及服务进行有效的管理。以此提高酒店管理与酒店服务效率，对酒店工作人员、顾客、服务业务之间实现实时工作对接，完成酒店业务管理的有效性，高效性。 本课题采用软件工程的理论与方法，从实际应用需要出发，深入研究了系统开发的关键技术及设计方法，设计了一个基于J2EE框架的酒店管理系统。系统采用了B/S软件体系结构，后台数据库采用SQLServer2005，对系统需求进行分析，对系统架构、系统功能等进行设计，以应用为...Hotel accommodation is to provide visitors with accommodation, entertainment, leisure places for the entire hotel industry, to play a decisive role in the business situation, and thus in the hotel management to effectively improve the operation of the hotel is essential. This article discusses how to implement a hotel management system for effective management of the hotel's business conditions an...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201323108

分析师发布现金流预测的动机研究——基于信号传递理论的研究视角

基于2008-2017年我国卖方分析师发布的研究报告数据,考察分析师内在能力与其额外发布现金流预测的关系。研究结果表明,高能力的分析师更倾向于在发布盈余预测的同时发布现金流预测,目的是向外传递与自身能力有关的信号。因此,对于还未获得良好声誉的非明星分析师,其内在能力越高,额外发布现金流预测的概率越大。研究还表明,对于机构投资者持股比例高的公司,分析师的内在能力与其额外签发现金流预测报告之间的正向关系更为显著。另外,分析师性别、学历、获取私有信息的能力及证券公司与上市公司的利益关联都会影响分析师内在能力与额外发布现金流预测的关系。国家自然科学基金项目“分析师额外签发现金流预测报告的动机和经济后果——基于信号传递的视角”(71462012);国家自然科学基金项目“媒体地域属性、媒体报道倾向与上市公司投融资行为”(71462011);国家自然科学基金项目“媒体传闻、公司澄清与经济后果性研究”(71802101

大亚湾水域两种拟菱形藻的形态学鉴定及毒素分析

对2005年分离自广东大亚湾的两种潜在产毒拟菱形藻进行了形态学观察和毒性分析.通过透射电子显微镜(TEM)观察确认藻种为细弱拟菱形藻(Pseudo-nitzschia cuspidata)和多纹拟菱形藻(P.multistriata).采用高效液相色谱法(HPLC)对这两种藻的常规培养样进行软骨藻酸毒素检测,结果均未检测到软骨藻酸.鉴于以上两种拟菱形藻存在着潜在产毒特性,不同培养条件的诱导实验尚需继续

Preparation and Properties of MnO_2 /polyaniline Composite

以δ-MnO2为前驱体,通过酸处理后引入苯胺并聚合,得到了MnO2/聚苯胺复合材料。经XRD分析表明,在本研究条件下,经酸处理后的δ-MnO2晶型由δ型转变为α型,而在随后的苯胺引入及其聚合步骤中MnO2晶型均不再改变。以200mA·g-1的电流进行恒电流充放电性能测试,结果显示,MnO2/聚苯胺复合材料的充放电容量达到160.2mA·g-1,与酸处理后得到的α-MnO2接近(160.9mA·g-1),但比前驱体δ-MnO2高(125.8mA·g-1);更为重要的是,MnO2/聚苯胺复合材料与前驱体及酸处理得到的样品相比,其循环性能得到了较大的提高。MnO2 /polyaniline composite was prepared by polymerization of aniline in α-MnO2 from the acid-treating precursor of δ-MnO2. XRD results showed that during acid treatment the precursor of δ-MnO2 was transformed into α-MnO2, and this in α-MnO2 polymorph kept unchanged in the subsequent processes, as intercalation and polymerization of aniline. Comparison of charge-discharge performances among the precursor, its acid-treated form and the final composite, showed that at current density of 200 mA·g-1 the discharge capacity of the composite was 160.2 mA·g-1, which is close to that of the acid-treated material (160.9 mA·g-1) but higher than that of the precursor (125.8 mA·g-1). More important, the MnO2 /polyaniline composite showed a much better cyclic performance than the precursor and its acid-treated form.福建省高新技术重点项目(No2005H071);; 三明市重点科技项目(No2005-G-9

Preparation and properties of MnO2/polyaniline composite

MnO2/polyaniline composite was prepared by polymerization of aniline in alpha-MnO2 from the acid-treating precursor of delta-MnO2. XRD results showed that during acid treatment the precursor of delta-MnO2 was transformed into alpha-MnO2, and this in alpha-MnO2 polymorph kept unchanged in the subsequent processes, as intercalation and polymerization of aniline. Comparison of charge-discharge performances among the precursor, its acid-treated form and the final composite, showed that at current density of 200 mA . g(-1) the discharge capacity of the composite was 160.2 mA.g(-1), which is close to that of the acid-treated material (160.9 mA . g(-1)) but higher than that of the precursor (125.8 mA . g(-1)). More important, the MnO2/polyaniline composite showed a much better cyclic performance than the precursor and its acid-treated form

内部人交易会影响会计信息可比性吗?

会计信息可比性是会计信息质量重要特征之一,有利于提高会计信息的决策有用性,进而促进资源优化配置。本文以内部人交易为视角,研究分析公司内部人的行为特征对会计信息可比性的影响。研究结果表明,公司内部人交易会显著降低会计信息可比性,而这种负相关关系主要表现在董事会成员的内部人交易行为组别。进一步研究发现,降低会计信息可比性有利于降低被监管机构处罚的可能性。本文研究不仅丰富了管理层行为特征与会计信息方面的文献,并为内部人交易的事后监管提供了新的启示。国家自然科学基金(71462012;71462011;71262005)的资助;;财政部“全国会计领军(后备)人才(学术类)培养项目”的支

Ion-exchange polymer metal composites and electromagnet combination driven fly-simulated robot

一种人工肌肉与电磁混合驱动的仿蝇机器人,属于微型机器人技术领域。包括电磁驱动器、两个IPMC转向驱动器、第一柔性传动机构、第一支架和两个第一翅膀,电磁驱动器的主体端固定在第一支架上,输出端与安装在第一支架上的第一柔性传动机构连接,第一柔性传动机构的两连接板上分别安装有转向驱动器,第一柔性传动机构及转向驱动器分别与第一翅膀连接,电磁驱动器和转向驱动器分别与电源连接。本发明采用混合驱动的方式,分别实现两翅膀的振动和各自转角的调整,使得飞行器具有转向功能,实现具有三自由度飞行功能的高机动性的扑翼微型机器人。驱动电压低,控制简单,且容易实现较大输出位移

Antibiotics used in livestock and poultry breeding and its environmental and health risks in China:A review

China has extensive livestock and poultry industries with substantial production and use of veterinary antibacterials. The longterm and massive use of veterinary antibacterials causes environmental pollution, increases bacterial resistance, and elevates safety risks for livestock, poultry, and agricultural products, further threatening human health. In this paper, we review the use of veterinary antibacterials in livestock and poultry breeding from 2009 to 2019 in China. The characteristics of the usage of veterinary antibacterials were analyzed. The findings show that the proportion of consumption of veterinary antibacterials in veterinary chemicals was 69.6%~74.1%. The utilization of veterinary antibacterials reached a maximum in 2014, and then decreased yearly. The main types of veterinary antibacterials are tetracycline, chlortetracycline, and oxytetracycline;chlortetracycline and oxytetracycline are mainly used to promote growth. Furthermore, the analysis of the antibiotics residue in different foods showed that the detection rates of antibiotics in milk, cultured fish, and vegetables were as high as 90.9%~100%. The average residue of quinolone in cultured fish was 725.13 mug·kg~(-1), which exceeds the national food safety limit standard(100 mug·kg~(-1)). Additionally, we summarize the situation of antibiotic residues in the environment and the emergence and mechanism of bacterial resistance. The effects of the massive use of antibiotics on animal and human health are discussed. Ultimately, management suggestions and strategies on the prevention of antibiotics pollution are proposed in terms of source, use, emission, and remediation to help control antibiotic pollution

Trace Element Determination in Teas and Discrimination Analysis for Teas

应用微波消解处理样品,电感耦合等离子体质谱法测定,考察了不同产地、不同种类的29种茶叶中的Mg、A l、P、Ca、Cr、Mn、Fe、Co、N i、Cu、Zn、Sr和Pb共13种元素的含量。原始数据经过标准化处理后,结合聚类分析和主成分分析,对来自江西、云南、广东和福建四个地区的茶叶进行了产地判别。对不同种类的茶叶(红茶、绿茶、乌龙茶、黑茶)也进行了区分,结果令人满意。茶叶中矿质元素的含量可做为茶叶产地判别的测量指标之一。The content of mineral elements in 29 tea samples from different areas(Jiangxi,Yunnan,Guangdong and Fujian),including green,black,oolong and dark tea,were analyzed.Mg,Al,P,Ca,Cr,Mn,Fe,Co,Ni,Cu,Zn, Sr,Pb were determined by ICP-MS after digesting by microwave digestion oven.Cluster analysis and principal component analysis(PCA) were applied to differentiate the tea varieties and their geographical origin.The classification performance was fair for these two methods.The content of the mineral elements in teas were good chemical descriptors for differentiating their geographical origins.山东省自然科学基金项目(Q2004B02

产生非平衡等离子体的装置

本实用新型涉及产生非平衡等离子体的装置，包括：一中心电极、3个外电极，由三相交流电源供电；上法兰、下法兰与本体顺序连成一体，中心电极和外电极插入本体内；上法兰的另一端面嵌入进气盘，其上开有孔和分别连接气路接头；在上法兰上还开有孔和导气孔；在沿导气孔向下法兰方向开一通孔，其通孔内嵌入一侧壁上有出气孔的出气帽；气路接头与气源连通；电极的中心进水接头和外进水接头与冷却水系统的出水管连通；电源的输出端与电极电连接。3个放电电弧之间的点燃时间在相位上相差120度，并在电极表面合成形成脉冲放电，产生连续性非平衡等离子体，保证等离子体在时间上的连续性。由于使用三相交流电源供电，降低了成本，便于操作和维修