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阳离子聚丙烯酰胺类絮凝剂PAD的合成及优化
丙烯酰氧乙基二甲基苄基氯化铵 丙烯酰胺 阳离子聚丙烯酰胺类絮凝剂 响应曲面法
2020/11/9
为了提高阳离子絮凝剂的絮凝性能，选用阳离子疏水表面活性单体DBC和亲水单体AM，以EDTA-2Na为络合剂，以AIBN和APS-NaHSO3为复合引发剂，采用水溶液聚合法制得一种新型阳离子聚丙烯酰胺类絮凝剂P(AM-DBC) (PAD)。此方法具有工艺操作简单、无需添加其他模板和表面活性剂、产物的相对分子质量高和转化率高等优势。单因素实验结果表明，当总单体质量分数为40%、单体摩尔比n(AM)∶n...
Information Conservational Security with “Black Hole” Keypad Compression and Scalable One-Time Pad — A Quantum Intelligence Approach to Pre- and Post-Quantum Cryptography
Pre- and Post-Quantum Cryptography Scalable One-Time Pad (S-OTP) Information Conservational Security (ICS)
2019/8/14
Whereas it is widely deemed impossible to overcome the optimality of the one-time pad (OTP) cipher in pre- and post-quantum cryptography, this work shows that the optimality of information theoretic s...
Scalable One-Time Pad --- From Information Theoretic Security to Information Conservational Security
Information Conservational Security Data Compression Quantum-Fuzzy Collective Precision
2018/11/16
Whereas it is widely deemed an impossible task to scale One-Time Pad (OTP) without sacrificing information theoretic security or network traffic, this paper presents a paradigm of Scalable OneTime Pad...
为简化对车辆侧倾动力学的研究特别是对车身侧倾角的估算和控制，提出针对车身侧倾角的Padé模型降阶方法。该文首先建立了线性三自由度车辆模型，并在此基础上推导出了车身侧倾角的传递函数，由于此传递函数的高阶特性难以用于车辆侧倾动力学的计算与控制中，所以接着对所推导出的侧倾角传递函数进行降阶处理。又考虑到车身侧倾的低频特性以及Padé模型降阶法在低频区能有较好的拟合效果，该文采用Padé模型降阶法对车身侧...
The Effect of Shoulder Pad Design on Head Impact Severity during Checking
CONCUSSION TRAUMATIC BRAIN INJURY BIOMECHANICS SPORTS PROTECTIVE EQUIPMENT RISK COMPENSATION
2018/4/24
Introduction Shoulder-to-head contact is the most common cause of concussions in ice hockey, accounting for 42% of cases in the National Hockey League. The goal of this project was to determine how sh...
Quantum Key Recycling with eight-state encoding (The Quantum One Time Pad is more interesting than we thought)
quantum cryptography eight-state encoding
2016/12/7
Perfect encryption of quantum states using the Quantum One-Time Pad (QOTP) requires 2 classical key bits per qubit. Almost-perfect encryption, with information-theoretic security, requires only slight...
运用HPM-Padé(同伦摄动-帕德逼近)法导出了当喷注流体速度与距平板前缘距离的平方根成反比时,不可压缩常物性流体外掠平板层流边界层内无量纲速度和无量纲温度解析表达式,无量纲流函数1阶导数的HPM-Padé解析解与4阶龙格库塔法的数值解结果一致.利用HPM-Padé解析解研究了喷注系数和流体Prandtl数对速度和温度分布的影响.结果表明:Prandtl数越大,温度边界层越薄,壁面温度梯度越大;...
Decreased Autocrine EGFR Signaling in Metastatic Breast Cancer Cells Inhibits Tumor Growth in Bone and Mammary Fat Pad
autocrine signaling bone marrow cells breast cancer
2014/11/6
Breast cancer metastasis to bone triggers a vicious cycle of tumor growth linked to osteolysis. Breast cancer cells and osteoblasts express the epidermal growth factor receptor (EGFR) and produce ErbB...
ForceDeformation Properties of the Human Heel Pad during Barefoot Walking
BIOMECHANICS ADIPOSE,TISSUE ELASTICITY FOOT
2017/5/23
The plantar heel pad is a specialized fibroadipose tissue that attenuates and, in part, dissipates the impact energy associated with heel strike. Although a near-maximal deformation of the heel pad ha...
二元齐次矩阵Padé-型逼近的计算比较复杂, 而通过适当的变量代换, 可以将二元齐次矩阵形式幂级数转化为一元含参数形式的矩阵形式幂级数, 从而给出二元齐次矩阵Padé-型逼近构造性的定义. 为提高二元齐次矩阵Padé-型逼近的逼近解精度, 借助于误差公式推导出基于矩阵EMN 的二元齐次矩阵正交多项式Padé-型逼近的分子和分母行列式表达式; 为避免计算高阶行列式, 建立了一种Sylvester-型...
To prevent the risk of ‘chair disease’, The University of Queensland researchers have developed a ‘sitting pad’ device that uses an alarm to alert workers to stand up more regularly.
广义逆函数值Padé逼近行列式的一个新算法
广义逆 函数值Padé 逼近 Arnoldi方法 反对称方程组 Schur补
2012/12/10
应用Arnoldi方法求解系数为反对称矩阵的线性方程组，给出广义逆函数值Padé逼近行列式公式的一种新的计算方法，并由此提供计算型为［n/2k］f(x,λ)的广义逆函数值Padé逼近的几个算法.通过实例说明方法的有效性.
为提高求矩阵Padé-型逼近解的精确度,给出一种求解矩阵Padé型逼近解的改进算法,即基于矩阵Euv的正交多项式Padé-型逼近算法.另外，当矩阵值幂级数展开式的系数产生微小摄动时,矩阵幂级数的Padé型逼近解变化往往很大,借助误差公式、内积单位矩阵和最小二乘法构造一种稳定性和精确度均有所提高的最小二乘形式矩阵Padé-型逼近算法.最后，对这两种算法分别给出完整的分子和分母行列式表达式.
二元齐次矩阵Padé-型逼近及误差公式
Padé-型逼近 矩阵幂级数 误差公式 二元齐次
2012/4/9
二元矩阵Padé-型逼近的计算比较复杂. 本文受Benouahmane和Cuyt的启发, 通过引入一种变量代换, 将二元齐次矩阵形式幂级数转化为一元含参数形式的矩阵形式幂级数, 并给出了二元齐次矩阵Padé-型逼近的构造性的定义和误差公式的证明. 数值实例说明了此方法的有效性.
Pain Relieving Effect of Thermoplastic Lumbosacral Orthosis with Adjustable Posterior Pad in Chronic Non-Specific Low Back Pain
Pain Relieving Effect Thermoplastic Lumbosacral Orthosis Adjustable Posterior Pad Chronic Non-Specific Low Back Pain
2015/9/25
Low back pain (LBP) is one of the common disabling conditions experienced by individuals through the world and the lifetime prevalence of LBP was reported about 84%.1,2 A type of LBP which occurs in t...