六、分组(groupby) 用pd.date_range函数生成连续指定天数的的日期 pd.date_range('20000101',periods=10) defshuju(): data={'date':pd.date_range('20000101',periods=10),'gender':np.random.randint(0,2,size=10),'height':np.random.randint(40,50,size=10),'weight':np.random.randint(150,180,...
data = {'state': ['Ohio', 'Ohio', 'Ohio', 'Nevada', 'Nevada'], 'year': [2000, 2001, 2002, 2001, np.nan], # np.nan表示NA 'pop': [1.5, 1.7, 3.6, 2.4, 2.9]} DataFrame(data, # index=['a','b','c','d','e'] # index = range(5) ) # 默认生成整数索引, 字典的键...
2 6 555 555 3 7 555 555 1. 2. 3. 4. 5. 6. 7. 8. 9. 可以通过相反逻辑的代码来实现else,如下 df.loc[df.AAA < 5, ["BBB", "CCC"]] = 2000 1. 或者使用mask和pandas的where来实现,下述表示在mask中,True的地方转化为-1000 In [9]: df_mask = pd.DataFrame({'AAA': [True] * ...
# pd.date_range()-日期范围:生成日期范围 # 2种生成方式:①start + end; ②start/end + periods # 默认频率:day rng1 = pd.date_range('1/1/2017','1/10/2017', normalize=True) rng2 = pd.date_range(start = '1/1/2017', periods = 10) rng3 = pd.date_range(end = '1/30/2017 1...
01利妥昔单抗(Rituximab):开启靶向免疫治疗的先河1. 历史背景与科学突破20世纪90年代前,肿瘤治疗主要依赖广谱细胞毒性药物,这些药物虽有一定疗效,但毒副作用显著。1975年杂交瘤技术的发明(Köhler & Milstein)实现了小鼠单克隆抗体的规模化生产。随后,嵌合抗体技术通过将小鼠抗体可变区与人恒定区融合,解决了免疫原性...
integrated USB Type-C PD controller Dual stage 50W transmitter solution with integrated buck-boost controller 2 Dual stage 50W transmitter solution with integrated buck-boost controller Figure 2 illustrates a typical application of W...
The PSE drives the PI voltage to the operating range once it has decided to power up the PD. When VVDD rises above the UVLO turn-on threshold (VUVLO_R, approximately 38 V) with RTN high, the TPS2378 enables the hotswap MOSFET with a approximately 140 mA (inrush) current limit as ...
A comma. Commas and periods are treated separately from other punctuation marks because they are used both as word punctuation marks and as delimiters in numbers, and need to be treated differently in the two cases. W_DIGIT A digit. W_END_PHRASE An end-of-phrase glyph (for example, ...
Table 2. TPH, TPL, BT and Allocated Power Truth Table PSE Type 1-2 1-2 1-2 1-2 2 3-4 3-4 3-4 3-4 3-4 3-4 3-4 4 4 PD Class 0 1 2 3 4 0 1 2 3 4 5 6 7 8 NUMBER OF CLASS CYCLES 1 1 1 1 2 1 1 1 1 2-3 4 4 5 5 PSE ALLOCATED POWER AT PD (W) ...
Freeman GJ et al., (2000), ‘Engagement of the PD-1 Immunoinhibitory Receptor by Novel B7 Family Member Leads to Negative Regulation of Lymphocyte Activation,’ J Exp Med, 192(7):1027-34. Heckman KL et al., (2007), ‘Fast-Tracked CTL: Rapid Induction of Potent Anti-Tumor Killer T ...