Sewage source heat pump unit operates under partial load most of the time, and study on the law of coefficient of performance (COP) of the unit varying with load ratio can provide basis for the heat pump units running...Sewage source heat pump unit operates under partial load most of the time, and study on the law of coefficient of performance (COP) of the unit varying with load ratio can provide basis for the heat pump units running in high efficiency. A mathematical model determining COP, evaporation temperature and condensation temperature of a single unit was proposed. Under the condition of uniform load distribution, the model was established according to different ways of bearing partial load with the same type multi...展开更多
In this paper, it is proved that if A is a normal proper contraction on Hilbert space H and F(z) = U(z) + iV(z) is operator-valued analytic on the unit disc Delta and 0 < p < 1, then parallel to F(A)parallel to(...In this paper, it is proved that if A is a normal proper contraction on Hilbert space H and F(z) = U(z) + iV(z) is operator-valued analytic on the unit disc Delta and 0 < p < 1, then parallel to F(A)parallel to(p) less than or equal to parallel to F(0)parallel to(p) + C-p (1 - parallel to A parallel to)(-2) [GRAPHICS]展开更多
Suppose H is a complex Hilbert space, A H(Δ) denotes the set of all analytic operator functions on Δ, and the set N H(Δ)=｛f(z)｜f(z) is an analytic operator function on the open uint disk Δ, f(z)f(w)=f(w)f(z),f...Suppose H is a complex Hilbert space, A H(Δ) denotes the set of all analytic operator functions on Δ, and the set N H(Δ)=｛f(z)｜f(z) is an analytic operator function on the open uint disk Δ, f(z)f(w)=f(w)f(z),f *(z)f(z)=f(z)f *(z),z,w∈Δ｝. The note proves that if f(z)∈N H(Δ),(or A H(Δ))‖f(z)‖≤1,z∈Δ then‖f′(T)‖≤(1-‖T‖ 2) -1 ‖I-f *(T)f(T)‖ 12 ‖I-f(T)f *(T)‖ 12 , where T∈L(H)(orT *T=TT *,respectively),‖T‖<1,Tf=fT.展开更多
目的对腹部手术全麻苏醒期躁动的相关因素进行分析,筛选出独立危险因素。方法观察腹部手术术后患者意识恢复情况,记录患者性别、年龄、体重、疾病类别、术前睡眠时间、麻醉时间、吸入麻醉用量、吸入麻醉停用时间、术中输液量、输血量、...目的对腹部手术全麻苏醒期躁动的相关因素进行分析,筛选出独立危险因素。方法观察腹部手术术后患者意识恢复情况,记录患者性别、年龄、体重、疾病类别、术前睡眠时间、麻醉时间、吸入麻醉用量、吸入麻醉停用时间、术中输液量、输血量、失血量、尿量。用Logistic回归分析研究影响全麻苏醒期躁动的相关因素。结果共有142例患者纳入分析,全麻苏醒期躁动发生率17.61%。年龄(B=-0.059,P=0.007,OR=0.943,95%CI of OR:0.902～0.986)和术前睡眠时间(B=-0.786,P=0.000,OR=0.455,95%CI of OR:0.317～0.655)对全麻苏醒期躁动具有显著影响。结论年龄和术前睡眠时间是影响腹部手术患者全麻苏醒期躁动的独立危险因素。展开更多
基金Supported by National Natural Science Foundation of China (No. 50578048)"Heating, Gas, Ventilation and Air Conditioning" Key Laboratory Open Subject in Beijing (No. KF200710)the Postdoctoral Researcher Science Foundation of China (No. 20090450986)
文摘Sewage source heat pump unit operates under partial load most of the time, and study on the law of coefficient of performance (COP) of the unit varying with load ratio can provide basis for the heat pump units running in high efficiency. A mathematical model determining COP, evaporation temperature and condensation temperature of a single unit was proposed. Under the condition of uniform load distribution, the model was established according to different ways of bearing partial load with the same type multi...
文摘In this paper, it is proved that if A is a normal proper contraction on Hilbert space H and F(z) = U(z) + iV(z) is operator-valued analytic on the unit disc Delta and 0 < p < 1, then parallel to F(A)parallel to(p) less than or equal to parallel to F(0)parallel to(p) + C-p (1 - parallel to A parallel to)(-2) [GRAPHICS]
基金Education Foundation of Henan Province(981 1 0 0 1 2 )
文摘Suppose H is a complex Hilbert space, A H(Δ) denotes the set of all analytic operator functions on Δ, and the set N H(Δ)=｛f(z)｜f(z) is an analytic operator function on the open uint disk Δ, f(z)f(w)=f(w)f(z),f *(z)f(z)=f(z)f *(z),z,w∈Δ｝. The note proves that if f(z)∈N H(Δ),(or A H(Δ))‖f(z)‖≤1,z∈Δ then‖f′(T)‖≤(1-‖T‖ 2) -1 ‖I-f *(T)f(T)‖ 12 ‖I-f(T)f *(T)‖ 12 , where T∈L(H)(orT *T=TT *,respectively),‖T‖<1,Tf=fT.
文摘目的对腹部手术全麻苏醒期躁动的相关因素进行分析,筛选出独立危险因素。方法观察腹部手术术后患者意识恢复情况,记录患者性别、年龄、体重、疾病类别、术前睡眠时间、麻醉时间、吸入麻醉用量、吸入麻醉停用时间、术中输液量、输血量、失血量、尿量。用Logistic回归分析研究影响全麻苏醒期躁动的相关因素。结果共有142例患者纳入分析,全麻苏醒期躁动发生率17.61%。年龄(B=-0.059,P=0.007,OR=0.943,95%CI of OR:0.902～0.986)和术前睡眠时间(B=-0.786,P=0.000,OR=0.455,95%CI of OR:0.317～0.655)对全麻苏醒期躁动具有显著影响。结论年龄和术前睡眠时间是影响腹部手术患者全麻苏醒期躁动的独立危险因素。
