查询词典 A.B.

A boiler water controlling system with basifier a mg/L Na3PO4+b mg/L NH3+c mg/L NaOH is investigate in the paper. Several calculate methods are discussed and the precision pH value calculating equation is proposed for a cycle chemistry system that has seven changing parameters coexisting together, i. e. a mg/L Na3PO4+b mg/L NH3+c mg/L NaOH+d mg/L H2SO4+e mg/L CH3COOH+f mg/L CO2+g mg/L SiO2. As an example of equilibrium phosphate treatment, the pH value are obtained and showed in graphics with the four kinds of impurity changing from 0 to 1.0 mg/L. The calculating results can be used in practical boiler water pH value control.

对于一个采用a mg/L Na3PO4+b mg/L NH3+c mg/L NaoH碱化剂的炉水控制体系，主要讨论在炉水中存在d mg/L H2SO4+e mg/L CH3COOH+f mg/L CO2+g mg/ L SiO2 4种杂质时炉水pH值的计算方法，得到通用的pH值计算表达式；并以炉水平衡磷酸盐处理工况为例，计算这4种杂质在0-1 mg/L变化时，其单独或联合作用对炉水pH值的具体影响程度，以6幅图形展示计算结果，该结果可应用于炉水pH值的实际控制。

In this thesis, a S~(2-) modified B-Z oscillating system has been successfully used to determine some heavy metal ions and through examining the influence of S~(2-) and benzylpenicillin sodium on B-Z chemical oscillating reaction highly sensitive detection methods of them have been developed.

本文主要研究了利用硫离子修饰的B-Z化学振荡体系对一些重金属离子的测定；同时利用经典的B-Z化学振荡体系对非金属硫离子进行了测定，并考察了药物青霉素G钠盐对该体系的动力学扰动行为。

In 1991, a young Italian scientist, Walter Fontana , showed mathematically that a linear sequence of function A producing function B producing function C could be very easily circled around and closed in a cybernetic way into a self-generating loop, so that the last function was coproducer of the initial function.

1991年，一个年轻的意大利科学家沃尔特·方塔纳从数学角度阐述了功能A产生功能B，B再产生C这样的线性序列很容易环绕，并以控制论的方式构成自生的闭环，这样最后的功能就参与初始功能的产生。

In 1991, a young Italian scientist, Walter Fontana, showed mathematically that a linear sequence of function A producing function B producing function C could be very easily circled around and closed in a cybernetic way into a self-generating loop, so that the last function was coproducer of the initial function.

1991年，一个年轻的意大利科学家沃尔特丰塔纳从数学角度阐述了功能A产生功能 B ，B再产生C这样的线性序列很容易环绕，并以控制论的方式构成自生的闭环，这样最后的功能就参与初始功能的产生。

In 1991, a young Italian scientist, Walter Fontana , showed mathematically that a linear sequence of function A producing function B producing function C could be very easily circled around and closed in a cybernetic way into a self-generating loop, so that the last function was coproducer of the initial function.

1991年，一个年轻的意大利科学家沃尔特·方塔纳从数学角度阐述了功能A产生功能B，B再产生C这样的线性序列很容易被绕成圈，并以控制论的方式封闭为自生的环，这样最后的功能就成为初始功能的共同生者。

In 1991, a young Italian scientist, Walter Fontana , showed mathematically that a linear sequence of function A producing function B producing function C could be very easily circled around and closed in a cybernetic way into a self-generating loop, so that the last function was coproducer of the initial function.

1991年，年轻的意大利科学家沃尔特·方塔纳从数学角度阐述了功能A产生功能B，B再产生C这样的线性序列很容易被绕成圈，并以控制论的方式封闭为自生的环，这样最后的功能就成为初始功能的共同生者。

Photoinduced Electron Transfer [2+2] Cycloaddition Reactions ofBenzannelated Isoquinolin-1-ones with Electron Deficient Alkenes Photoinduced [2+2] cycloaddition reactions of 11H-benzoxazolo[3,2-b]isoquinolin-11-one 8 and 11H-benzothiazolo[3,2-b]isoquinolin-11-one 13 with electron deficient alkenessuch as acrylonitrile, methyl acrylate, dimethyl fumarate and dimethyl maleate afforded a group of polycyclic isoquinoline derivatives bearing cyclobutane moieties ingood to excellent yields and resulted in the Schenck isomerization of the alkenes.

3苯并增环异喹啉-1-酮与缺电子烯烃的光诱导电子转移[2+2]环加成反应 11H-苯并恶唑[3，2-b]异喹啉-11-酮8和11H-苯并噻唑[3，2-b]异喹啉-11-酮13与缺电子烯烃如丙烯腈，丙烯酸甲酯，富马酸二甲酯及马来酸二甲酯的光诱导[2+2]环加成反应以高产率给出一系列含有环丁烷结构单元的多环异喹啉衍生物并导致烯烃的Schenck异构化作用。

AB-Ⅰshowed single and symmetrical peak, a light yellow powder was obtained after dialyzation and freeze-drying. AB-Ⅱand AB-Ⅲwere devided into two parts, collected the main peak, we gained AB-Ⅱ-b which was yellow powder and AB-Ⅲ-b which was brown powder.

AB-Ⅰ、AB-Ⅱ和AB-Ⅲ分别再通过Sepharose CL-4B凝胶层析进一步分级，AB-Ⅰ得到单一对称峰，透析干燥后为淡黄色粉末，AB-Ⅱ和AB-Ⅲ在主峰之前分别有一小峰，收集主峰，得到AB-Ⅱ-b和AB-Ⅲ-b，透析干燥后分别呈黄色和褐色粉末。

B. Diagnosis of macrosomia requires ultrasound evaluation; however, estimation of fetal weight based on ultrasound is associated with a large

B。巨大儿的诊断需要B超测量估计；然而，基于B超估计的胎儿体重与实际体重间也有很大的误差。

This research utilizes the Bower-Burgelman process model ( B-B Model ) in a qualitative case study for investigation of business exit process to understand the role and responsibility within multilevel managership and strategy making through establishing of the HVF Strategic Business Exit model.

本研究应用B-B过程模式工具，对事业部撤离过程进行质性的个案研究，以了解各层级经理人的角色扮演与公司策略决策的过程，并创新性的建立HVF版策略事业部撤离模式。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。