Results 1 to 10 of about 14,440 (168)
Study on the calculation method for molecular volume of chemical compounds(化合物分子体积计算方法的研究)
Zhejiang Daxue xuebao. Lixue ban, 2003 本文提出了一种计算化合物分子体积的有效方法,在确定化合物分子构象的基础上,将随机变量的统计方法引入计算体系,可以计算出化合物任一构象条件下的分子体积.比较计算结果可知,我们的方法与同类其他计算方法同等精确,但算法的简捷、快速显得更为优越.在将我们的方法计算的化合物的分子体积用于化合物的结构-性质相关性研究时发现,分子体积能较好地表征化合物的结构特征.
GUOMing(郭明) +4 more
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Zhejiang Daxue xuebao. Lixue ban, 2006 分析了用图形方法计算逻辑函数的布尔差分与布尔偏导数存在的问题，在分析布尔差分与布尔偏导数的定义的基础上提出了计算布尔差分与布尔偏导数的表格方法，讨论了在1值最小项数较多时用计算布尔差分与布尔偏导数的表格方法.本文提出的表格方法与图形方法相比，具有不需画图，操作方便，易于计算机编程操作以及可用于多变量逻辑函数等优点.
LIANYi-qun(练益群) +1 more
doaj +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2007 根据saul'yev型非对称差分格式和Crank-Nicolson差分格式对二维的对流-扩散方程构造了 一类新的并行算法，即交替分带的Crank-Nicolson方法.该方法具有并行性质，可以在高性能的并行计算机上直接计算，稳定性好.数值实验表明，该方法有很好的精度.
JIAYun-tao(贾云涛) +2 more
doaj +1 more source
DCT/IDCT-based interpolation for channel estimation in OFDM systems(OFDM系统DCT/IDCT插值信道估计算法)
Zhejiang Daxue xuebao. Lixue ban, 2008 导频辅助信道估计是OFDM系统常用的信道估计算法，本文研究基于变换域的导频辅助信道估计算法.在DFT插值法的基础上，提出了基于离散余弦变换(DCT)的信道估计方法.仿真结果表明，该插值算法的MSE和SER性能优于DFT方法.与MMSE算法相比，该插值算法计算复杂度低，易于物理实现.
JINNing(金宁) +2 more
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Research into nonlinear global orthogonal transformation of the acoustic waveguide(声波导中非线性全局正交变换的研究)
Zhejiang Daxue xuebao. Lixue ban, 2008 为能在带有极点的不平坦底部边界的声波导中实施快速步进计算Helmholtz方程，构造了几种能将弯曲底边界平坦化的非线性、非对称化全局坐标变换，这些变换一方面缓解了坐标曲线的局部“拥挤”状况，另一方面对步进计算中所涉及到的Helmholtz方程特征问题进行分析计算，提高了用Rayleigh迭代计算特征问题的效率，通过比较分析，指出了一个有效计算方法——分段步进法，为大步长计算波的传播提供了可靠的处理方法.
ZHUJian-xin(朱建新) +1 more
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Research on the algorithm for data exchange of optical equipments(光测设备数据交汇计算方法研究)
Zhejiang Daxue xuebao. Lixue ban, 2008 通过对靶场试验中传统数据交汇计算方法的分析，针对光学装备数据交汇计算中存在的目标在基线附近精度畸变的问题，提出了一种新的数学模型“最短距离法”.该方法与水平投影法和垂直投影法的数据交汇计算方法相比，具有计算精度高和适用范围广等优点，拓展了采用光学装备进行测量的适用范围，大大提高了测试装备布站的灵活性.
FUXiao-cheng(傅晓程) +1 more
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Zhejiang Daxue xuebao. Lixue ban, 2013 为简化与-或-非代数系统中一阶和n阶布尔e-导数的计算过程，提出了一种基于简化分解图的新方法.该方法通过计算简化分解图相应列的与运算得到一阶布尔e-导数，n阶布尔e-导数通过计算倒置简化分解图来得到.该方法同样适用于含任意项逻辑函数一阶和n阶布尔e-导数的计算.应用实例表明该方法具有直观、简单等特点.
LIXiao-hua(厉晓华) +1 more
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Veterinary Dermatology, EarlyView.Background – Allergen immunotherapy is used as aetiological treatment for canine atopic dermatitis (cAD). Objective – To assess the anti‐inflammatory agent‐sparing effect over 1 year of immunotherapy using pullulan‐conjugated recombinant Der f 2 (rDf2‐P). Conclusions and Clinical Relevance – Der f 2‐P immunotherapy can lead to a rapid reduction in anti‐
Masahiko Nagata +7 more
wiley +1 more source
Veterinary Dermatology, EarlyView.Background – Recurrent urticaria is common in horses. The pathophysiology is poorly understood and treatment options are limited. Often only glucocorticoids are effective for controlling clinical signs, albeit with potential adverse effects. Studies investigating new treatments need a validated objective scoring system for the grading of skin lesions ...
Katharina Birkmann +5 more
wiley +1 more source
Poverty &Public Policy, Volume 17, Issue 2, June 2025.ABSTRACT To tackle lasting rural poverty and fully eradicate absolute poverty by 2020, the Chinese government introduced the “targeted poverty alleviation” (TPA) policy in 2013. Quantitative assessments prove the policy's success; yet multidimensional aspects and subjective perceptions of rural poverty are insufficiently accounted for.
Lisa Hoeschle, Shuang Liu, Xiaohua Yu
wiley +1 more source