1、We will continue to improve the companys internal control system, and steady improvement in ability to manage and control, optimize business processes, to ensure smooth processes, responsibilities in place; to further strengthen internal controls, play a control post independent oversight role of ev
2、aluation complying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related transactions, strengthening operations in accordance with law. Deepening the information management to ensure full communication “zero resista
3、nce“. To constantly perfect ERP, and BFS+, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources shared; to expand Portal system application of breadth and depth, play information system on enterprise of Assistant role; t
4、o perfect daily run maintenance operation of records, promote problem reasons analysis and system handover; to strengthening BFS+, and ERP, and SCM, technology application of training, improve employees application information system of capacity and level. Humanistic care to ensure “zero.“ To streng
5、thening Humanities care, continues to foster company wind clear, and gas are, and heart Shun of culture atmosphere; strengthening love helped trapped, care difficult employees; carried out style activities, rich employees life; strengthening health and labour protection, organization career health m
6、edical, control career against; continues to implementation psychological warning prevention system, training employees health of character, and stable of mood and enterprising of attitude, created friendly fraternity of Humanities environment. To strengthen risk management, ensure that the business
7、 of “zero risk“. To strengthened business plans management, will business business plans cover to all level, ensure the business can control in control; to close concern financial, and coal electric linkage, and energy-saving scheduling, national policy trends, strengthening track, active should; to
8、 implementation State-owned assets method, further specification business financial management; to perfect risk tube control system, achieved risk recognition, and measure, and assessment, and report, and control feedback of closed ring management, improve risk prevention capacity. To further standa
9、rdize trading, and strive to achieve “according to law, standardize and fair.“ Innovation of performance management, to ensure that potential employees “zero fly“. To strengthen performance management, process control, enhance employee evaluation and levels of effective communication to improve perf
10、ormance management. To further quantify and refine employee standards . Work, full play party, and branch, and members in “five type Enterprise“ construction in the of core role, and fighting fortress role and pioneer model role; to continues to strengthening “four good“ leadership construction, ful
11、l play levels cadres in enterprise development in theof backbone backbone role; to full strengthening members youth work, full play youth employees in company development in the of force role; to improve independent Commission against corruption work level, strengthening on enterprise business key l
12、ink of effectiveness monitored. , And maintain stability. To further strengthen publicity and education, improve the overall legal system. We must strengthen safety management, establish and improve the education, supervision, and evaluation as one of the traffic safety management mechanism. To cons
13、cientiously sum up the Olympic security controls, promoting integrated management to a higher level, higher standards, a higher level of development. Employees, today is lunar calendar on December 24, the ox Bell is about to ring, at this time of year, we clearly feel the pulse of the XX power gener
14、ation company to flourish, to more clearly hear XX power generation companies mature and symmetry breathing. Recalling past one another across a railing, we are enthusiastic and full of confidence. Future development opportunities, we more exciting fight more spirited. Employees, let us together acr
15、oss 2013 full of challenges and opportunities, to create a green, low-cost operation, full of humane care of a world-class power generation company and work hard! The occasion of the Spring Festival, my sincere wish that you and the families of the staff in the new year, good health, happy, happy14
16、本 题 附 图 所 示 的 贮 槽 内 径 D=2 m， 槽 底 与 内 径 d0 为 32 mm 的 钢 管 相 连 ， 槽 内 无液 体 补 充 ， 其 初 始 液 面 高 度 h1 为 2 m（ 以 管 子 中 心 线 为 基 准 ）。 液 体 在 管 内 流 动 时 的 全 部 能 量 损失 可 按 hf=20 u2 计 算 ， 式 中 的 u 为 液 体 在 管 内 的 平 均 流 速 （ m/s） 。 试 求 当 槽 内 液 面 下 降 1 m 时所 需 的 时 间 。解 ： 由 质 量 衡 算 方 程 ， 得（ 1）12dMW（ 2）20b4u，（ 3）dhD将 式 （ 2） ，
17、 （ 3） 代 入 式 （ 1） 得20b4u即 （ 4）0()dh在 贮 槽 液 面 与 管 出 口 截 面 之 间 列 机 械 能 衡 算 方 程22b1bfupgzzh即 22fbb0.5h或 写 成 2b0.5981（ 5）b6u式 （ 4） 与 式 （ 5） 联 立 ， 得2d.()0.3h即 i.c. =0， h=h1=2 m； =， h=1m 积 分 得 .3s467564118 某 液 体 以 一 定 的 质 量 流 量 在 水 平 直 圆 管 内 作 湍 流 流 动 。 若 管 长 及 液 体 物 性 不 变 ，将 管 径 减 至 原 来 的 1/2， 问 因 流 动 阻 力
18、 而 产 生 的 能 量 损 失 为 原 来 的 多 少 倍 ？解 ： 流 体 在 水 平 光 滑 直 圆 管 中 作 湍 流 流 动 时= fpfh或 = / =ff2buLd=（f12h2b12)()式 中 =2 ， =（ ） 2 =4db1ud因 此 = =32f1h()1又 由 于 25.0Re36=（ =（ =（ 2 =（ 0.5） 0.25=0.841121.)0.51b2)du4.)We will continue to improve the companys internal control system, and steady improvement in ability
19、to manage and control, optimize business processes, to ensure smooth processes, responsibilities in place; to further strengthen internal controls, play a control post independent oversight role of evaluation complying with third-party responsibility; to actively make use of internal audit tools det
20、ect potential management, streamline, standardize related transactions, strengthening operations in accordance with law. Deepening the information management to ensure full communication “zero resistance“. To constantly perfect ERP, and BFS+, and PI, and MIS, and SCM, information system based constr
21、uction, full integration information system, achieved information resources shared; to expand Portal system application of breadth and depth, play information system on enterprise of Assistant role; to perfect daily run maintenance operation of records, promote problem reasons analysis and system ha
22、ndover; to strengthening BFS+, and ERP, and SCM, technology application of training, improve employees application information system of capacity and level. Humanistic care to ensure “zero.“ To strengthening Humanities care, continues to foster company wind clear, and gas are, and heart Shun of cult
23、ure atmosphere; strengthening love helped trapped, care difficult employees; carried out style activities, rich employees life; strengthening health and labour protection, organization career health medical, control career against; continues to implementation psychological warning prevention system,
24、 training employees health of character, and stable of mood and enterprising of attitude, created friendly fraternity of Humanities environment. To strengthen risk management, ensure that the business of “zero risk“. To strengthened business plans management, will business business plans cover to al
25、l level, ensure the business can control in control; to close concern financial, and coal electric linkage, and energy-saving scheduling, national policy trends, strengthening track, active should; to implementation State-owned assets method, further specification business financial management; to p
26、erfect risk tube control system, achieved risk recognition, and measure, and assessment, and report, and control feedback of closed ring management, improve risk prevention capacity. To further standardize trading, and strive to achieve “according to law, standardize and fair.“ Innovation of perform
27、ance management, to ensure that potential employees “zero fly“. To strengthen performance management, process control, enhance employee evaluation and levels of effective communication to improve performance management. To further quantify and refine employee standards . Work, full play party, and b
28、ranch, and members in “five type Enterprise“ construction in the of core role, and fighting fortress role and pioneer model role; to continues to strengthening “four good“ leadership construction, full play levels cadres in enterprise development in theof backbone backbone role; to full strengthenin
29、g members youth work, full play youth employees in company development in the of force role; to improve independent Commission against corruption work level, strengthening on enterprise business key link of effectiveness monitored. , And maintain stability. To further strengthen publicity and educat
30、ion, improve the overall legal system. We must strengthen safety management, establish and improve the education, supervision, and evaluation as one of the traffic safety management mechanism. To conscientiously sum up the Olympic security controls, promoting integrated management to a higher level,
31、 higher standards, a higher level of development. Employees, today is lunar calendar on December 24, the ox Bell is about to ring, at this time of year, we clearly feel the pulse of the XX power generation company to flourish, to more clearly hear XX power generation companies mature and symmetry br
32、eathing. Recalling past one another across a railing, we are enthusiastic and full of confidence. Future development opportunities, we more exciting fight more spirited. Employees, let us together across 2013 full of challenges and opportunities, to create a green, low-cost operation, full of humane
33、 care of a world-class power generation company and work hard! The occasion of the Spring Festival, my sincere wish that you and the families of the staff in the new year, good health, happy, happy2故 =320.84=26.9 f1h19 用 泵 将 2104 kg/h 的 溶 液 自 反 应 器 送 至 高 位 槽（ 见 本 题 附 图 ） 。 反 应 器 液 面 上 方 保 持 25.9103
34、Pa 的 真 空度 ， 高 位 槽 液 面 上 方 为 大 气 压 。 管 道 为 76 mm4 mm 的钢 管 ， 总 长 为 35 m， 管 线 上 有 两 个 全 开 的 闸 阀 、 一 个 孔 板流 量 计 （ 局 部 阻 力 系 数 为 4） 、 五 个 标 准 弯 头 。 反 应 器 内 液面 与 管 路 出 口 的 距 离 为 17 m。 若 泵 的 效 率 为 0.7， 求 泵 的 轴功 率 。 （ 已 知 溶 液 的 密 度 为 1073 kg/m3， 黏 度 为 6.3 10-4 Pa s。 管 壁 绝 对 粗 糙 度 可 取 为 0.3 mm。 ）解 ： 在 反 应 器
35、液 面 1-1， 与 管 路 出 口 内 侧 截 面 2-2， 间 列机 械 能 衡 算 方 程 ， 以 截 面 1-1， 为 基 准 水 平 面 ， 得22bb1e fuuppgzWzh（ 1）式 中 z1=0， z2=17 m， ub1 0sm43.1s0768.75.362424b dwup1=-25.9103 Pa (表 )， p2=0 (表 ) 将 以 上 数 据 代 入 式 （ 1） ， 并 整 理 得b1e2 f(uWgzh=9.8117+ + + =192.0+432.079.53ffh其 中 =（ + + ）fheLdbu= =1.656105 Rebu3.6.04.d根 据
36、 Re 与 e/d 值 ， 查 得 =0.03， 并 由 教 材 可 查 得 各 管 件 、 阀 门 的 当 量 长 度 分 别 为闸 阀 （ 全 开 ） ： 0.432 m =0.86 m标 准 弯 头 ： 2.25 m =11 m故 =(0.03 +0.5+4) =25.74J/kgfhJ32于 是 kg7J.19e W泵 的 轴 功 率 为= = =1.73kWsNe/w.0362.420 如 本 题 附 图 所 示 ， 贮 槽 内 水 位 维 持 不 变 。 槽 的 底部 与 内 径 为 100 mm 的 钢 质 放 水 管 相 连 ， 管 路 上 装 有 一 个 闸阀 ， 距 管 路
37、 入 口 端 15 m 处 安 有 以 水 银 为 指 示 液 的 U 管 压 差计 ， 其 一 臂 与 管 道 相 连 ， 另 一 臂 通 大 气 。 压 差 计 连 接 管 内充 满 了 水 ， 测 压 点 与 管 路 出 口 端 之 间 的 直 管 长 度 为 20 m。（ 1） 当 闸 阀 关 闭 时 ， 测 得 R=600 mm、 h=1500 mm； 当闸 阀 部 分 开 启 时 ， 测 得 R=400 mm、 h=1400 mm。 摩 擦 系 数可 取 为 0.025， 管 路 入 口 处 的 局 部 阻 力 系 数 取 为 0.5。 问 每小 时 从 管 中 流 出 多 少 水
38、 （ m3） ？习 题 19 附 图 习 题 20 附 图We will continue to improve the companys internal control system, and steady improvement in ability to manage and control, optimize business processes, to ensure smooth processes, responsibilities in place; to further strengthen internal controls, play a control post ind
39、ependent oversight role of evaluation complying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related transactions, strengthening operations in accordance with law. Deepening the information management to ensure ful
40、l communication “zero resistance“. To constantly perfect ERP, and BFS+, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources shared; to expand Portal system application of breadth and depth, play information system on en
41、terprise of Assistant role; to perfect daily run maintenance operation of records, promote problem reasons analysis and system handover; to strengthening BFS+, and ERP, and SCM, technology application of training, improve employees application information system of capacity and level. Humanistic car
42、e to ensure “zero.“ To strengthening Humanities care, continues to foster company wind clear, and gas are, and heart Shun of culture atmosphere; strengthening love helped trapped, care difficult employees; carried out style activities, rich employees life; strengthening health and labour protection,
43、 organization career health medical, control career against; continues to implementation psychological warning prevention system, training employees health of character, and stable of mood and enterprising of attitude, created friendly fraternity of Humanities environment. To strengthen risk managem
44、ent, ensure that the business of “zero risk“. To strengthened business plans management, will business business plans cover to all level, ensure the business can control in control; to close concern financial, and coal electric linkage, and energy-saving scheduling, national policy trends, strengthe
45、ning track, active should; to implementation State-owned assets method, further specification business financial management; to perfect risk tube control system, achieved risk recognition, and measure, and assessment, and report, and control feedback of closed ring management, improve risk preventio
46、n capacity. To further standardize trading, and strive to achieve “according to law, standardize and fair.“ Innovation of performance management, to ensure that potential employees “zero fly“. To strengthen performance management, process control, enhance employee evaluation and levels of effective
47、communication to improve performance management. To further quantify and refine employee standards . Work, full play party, and branch, and members in “five type Enterprise“ construction in the of core role, and fighting fortress role and pioneer model role; to continues to strengthening “four good“
48、 leadership construction, full play levels cadres in enterprise development in theof backbone backbone role; to full strengthening members youth work, full play youth employees in company development in the of force role; to improve independent Commission against corruption work level, strengthening on enterprise business key link of effectiveness monitored. , And maintain stability. To further strengthen publicity and education, improve the overall legal system. We must strengthen safety management, establish and improve the education, supervision, and evaluation as on
