The Studies of Z Company Project Risk Management

对于小型软件企业来讲，其如何有效管理其项目风险对于企业的发展来讲至关重要，其主要原因在于有效的软件项目风险管理有助于实现软件企业风险的有效管理，降低企业所面临的风险，从而拟定有效的措施进行项目风险的规避，最终实现软件企业本身的可持续发展。在这种背景下，本文首先对软件企业项目风险管理的理论进行了梳理，以求为实现项目风险管理的实践分析提供理论基础。在此基础上选择Z软件企业作为研究的载体，运用理论研究法、资料研究法及案例研究法结合其软件开发项目风险管理的现状、问题及成因进行了全面的项目风险管理分析，并对风险管理的影响因素、应对方案进行了设计，力求立体化的解决当前Z软件企业所面临的项目风险。通过研究，...For small software enterprise, the importance of effective management of project risks is significant for the enterprise development. The effective risk management of software project contributes to the realization of effective risk management of software enterprises, reducing business risks, so as to formulate effective measures to avoid project risk, finally to realize the sustainable developmen...学位：工商管理硕士院系专业：管理学院_工商管理硕士(MBA)学号：1792006115163

动力学室温磷光法测定α-溴代萘

报道用动力学室温磷光法测定α－溴代萘（α－ＢｒＮｐ）的新方法．检出限为３．５８×１０－５ｍｏｌ／Ｌ，相对标准偏差小于１６．２％

同步荧光法同时测定苯甲酸和水杨酸的研究

根据苯甲酸与水杨酸在酸性条件下荧光光谱出现的差异，用同步荧光法同时测定其混合物中二组份。苯甲酸及水杨酸的检测限分别为０．２４μｇ／ｍＬ和０．２５μｇ／ｍＬ，相对标准偏差分别为１．３％和１．２％。方法用于商品杀菌防腐剂中苯甲酸与水杨酸的同时测定，结果满意。Ａｂｓｔｒａｃｔ：Ｂａｓｅｄｏｎｔｈｅｅｖｉｄｅｎｔｄｉｆｆｅｒｅｎｃｅ，ｏｆｆｌｕｏｒｅｓｅｅｎｃｅｓｐｅｔｒａｃｈａｒａｃｔｅｒｉｓｔｉｃｓｂｅｔｗｅｅｎｂｅｎｚｏｉｃａｃｉｄａｎｄｓａｌｉｃｙｌｉｃａｃｉｄｉｎ１．０ｍｏｌ／ＬａｑｕｅｏｕｓＨ２ＳＯ４ｓｏｌｕｔｉｏｎ，ａｎｅｗｍｅｔｈｏｄｈａｓｂｅｅｎｅｓｔａｂｌｉｓｈｅｄｆｏｒｓｉｍｕｌｔａｎｅｏｕｓｄｅｔｅｒｍｉｎａｔｉｏｎｏｆｂｅｎｚｏｉｃａｃｉｄａｎｄｓａｌｉｃｙｌｉｃａｃｉｄｉｎｍｉｘｔｕｒｅｓｂｙｓｙｎｃｈｒｏｎｏｕｓｆｌｏｕｒｉｍｅｔｒｙ．Ｔｈｅｄｅｔｅｃｔｉｏｎｌｉｍｉｔｓｏｆｂｅｎｚｏｉｃａｃｉｄａｎｄｓａｌｉｃｙｌｉｃａｃｉｄａｒｅ：０．２４μｇ／ｍＬａｎｄ０．２５μｇ／ｍＬ，ｒｅｓｐｅｃｔｉｖｅｌｙ．Ｔｈｅｒｅｌａｔｉｖｅｓｔａｎｄａｒｄｄｅｖｉ

国家数字科技文献资源长期保存体系的战略与实践

为解决社会对数字文献资源日益增长的需求和数字文献资源处于多重威胁、&ldquo;濒于损 毁&rdquo;的使用现状之间的突出矛盾，国家科技图书文献中心牵头组织了国家数字科技文献长期保存 体系的建设，在中国大陆本土长期保存对我国具有重要价值的国内外数字文献资源，确立了合理 平衡的长期保存权益管理制度，形成了国家主导、联合参与、可靠管理和公共服务的长期保存体 系，建立了可靠高效的长期保存技术流程和技术系统，提出了公共保存审计和保存机构认证机 制，已经保存了一大批重要的科技数字文献资源，为我国数字知识内容资源的长期保存奠定了坚 实基础。</p

闽南地区TT病毒的变异及经输血传播的初步证据

TT virus(TTV)DNA was tested by nested-PCR from sera of hepatitis patients and volunteer blood donors in Minnan area. The amplified segment was a 189 base pair region in TTV ORF2. A total of six sequences were obtained from three non-A to G hepatits patients and two from volunteer blood donors. The sequences were found to be with 82.9% to 99.3% homology to TTV Japanese strain and Chinese strain. The divergence of sequence in these six segments varied from 0.7% to 17.1%, which indicated that the TTV had been existing for a long time in this area. In the serum of a non-A to G hepatitis patient who was negative for TTV DNA in the 14th day of disease course turned to be positive in the 30th day, two TTV sequences were obtained which showed 92.1% nucleotide homology. It indicated that different TTV strains can co exist in the same person. This patient's blood had been transfused ten times between the collection of his TTV negative sample and his positive serum sample. Seven of the blood donors were traced an..

TT病毒与肝炎关系的临床流行病学研究

目的　对闽南地区各种肝炎患者、健康体检者、义务献血员和肝癌患者共480例从临床流行病学角度探讨TT病毒(TTV)的致病性及其与各种肝炎的关系。方法　采用巢式PCR检测血清TTVDNA、ELISA检测血清抗HAVIgM、HBsAg、抗HBcIgM、抗HCVIgG、抗HEVIgG,用EPIINFO60软件进行统计分析。结果　480名研究对象中TTVDNA的总检出率为23.96%。各种肝炎患者的TTV总阳性率为2394%,肝癌患者的TTV阳性率为2069%,而健康者的TTV阳性率为2484%,义务献血员的阳性率为3000%,均未见明显差别。从临床类型看,急性肝炎、慢性肝炎和重症肝炎的TTV阳性率都在25%左右;从病原类型看,非甲～戊型肝炎的TTV阳性率为2619%,并未见与相应健康者的2523%阳性率的差别;除HCV由于感染率太低而无法分析外,HAV、HBV、HEV阳性肝炎患者间TTV的阳性率分别为2000%、2314%、2179%,未见TTV与这些已知肝炎病毒的明显相关。对一个时期内的全部135例住院肝炎患者及153名健康者进行肝炎病原分析,HAV、HBV、HEV在肝炎患者中的阳性率都要明显高于健康人(P=00142),而TTV在肝炎患者中的阳性率与健康人没有明显差别(P=06021);对病毒的单独致病性进行分析,HAV、HBV、HEV在非重叠感染的肝炎患者中的阳性率都要明显高于健康人(P=00037),而TTV在非甲～戊型肝炎患者中的

Measurement of temperature, velocity and water vapor concentration in a scramjet combustor based on nearinfrared diode laser absorption

A multi-channel Tunable Diode Laser Absorption Spectroscopy (TDLAS) system was designed and constructed for flow parameters diagnostics in a scramjet combustor. Two fiber coupled distributed feedback (DFB) lasers with narrow line width were used to probe two H2O absorption features (7185.597cm-1,7444.35cm-1+7444.37cm-1(c ombined)) by using direct absorption Time-Division-Multiplexing (TDM) strategy at a 4-kHz repetition rate. Laser light was split into five beams and transmitted across the test region. Two motorized precision translation stages were used to move the collimators during the test, so that the three beams located near the cavity and at the exit of the combustor can scan the cross sections respectively. Flow parameters could be obtained simultaneous which included average temperature, water vapor concentration and velocity at the entrance of the combustor, the distribution of temperature, water vapor concentration at a cross section near the cavity, the distribution of temperature, water vapor concentration and velocity at the exit cross section of the combustor. The parameters of the flow entering and exiting the combustor could be used to evaluate the performance of the direct-connected scramjet facility and the combustion efficiency of the combustor. The parameters at the cross section in the combustor could also be used to analysis combustion characteristics in the combustor