On the Distribution of Prime-Triplets

A new approach to the research of the distribution of prime-triplets is developed．It differs from the usual methods（involving the sieve method）for this kind of research,and basing on Chebyshev inequality and on the computation of average concentration of all the related subset．It leads to the proofs of following Lemma ２and Theorem２（Lemma１and Theorem１in Reference１had been proved by means of this new method）： 　Lemma２　Among all the prime-triplet-subsets there exists at least one such subset which is an infinite set． 　Theorem２　All the prime-triplet-subsets or infinitely many such subsets are infinite sets． Formulas for estimating the amount of such infinite sets are provided in this paper．     

基于至少满足弱硬实时限制的调度算法

提出了一种用于保证实时周期任务满足“至少满足”弱硬实时限制的算法.针对以往算法的缺点,扩充了弱硬实时限制的性质,定义了下确界限制并给出求解法.下确界限制用于保证任务满足“至少满足”弱硬实时限制,是任务满足限制的下确界.下确界限制的求解法计算负责度较低,因此在该求解法的基础上设计了调度算法MAA,用于保证任务满足“至少满足”弱硬实时限制.     

Lysosomal chymotrypsin B potentiates apoptosis via cleavage of Bid

We have reported that chymotrypsin B (CtrB) is not just a digestive enzyme but is also stored in lysosomes. Herein, we demonstrated a broad distribution of CtrB and explored the involvement of CtrB in apoptosis. Exposure of RH-35 cells to H₂O₂ or palmitate induced the redistribution of lysosomal CtrB into the cytoplasm as a result of lysosomal membrane permeabilization (LMP). Suppression of CtrB significantly blocked apoptosis, while overexpression of CtrB sensitized apoptosis markedly. CtrB could cleave Bid under neutral conditions. In RH-35 cells with Bid silenced, apoptosis induced by CtrB protein was attenuated, suggesting that CtrB mediates apoptosis of RH-35 cells mainly through processing Bid. Our data also suggest that LMP occurs earlier than mitochondrial outer membrane permeabilization; Bid activation initiated by caspase-8 might be reinforced by CtrB in consequence of LMP, which causes a positive feedback loop leading to the accumulation of tBid, and results in lysosome- and mitochondrion-dependent apoptosis.     

KL油田沙三下亚段混合沉积特征及演化

针对目前莱州湾凹陷南斜坡带KL油田沙河街组三段下亚段陆源碎屑与碳酸盐岩混合沉积形成条件、沉积特征及模式认识程度较低的问题,利用该区壁芯、薄片及扫描电镜等资料,结合构造演化、古气候和古地貌背景,在层序格架约束下研究沉积环境,分析其沉积特征。结果表明,研究区发育混合沉积,形成于宽缓斜坡、亚热带湿润气候,兼具湖平面、物源、水动力条件周期性变化等条件;该混合沉积包括相缘渐变混合与原地混合两种沉积类型,互层式和组分式两种混合模式,以及4种混合样式。两种混合沉积类型沉积机理不同,混合模式及组合样式表现较大差异,因而具有不同的储层微观特征。     

Optimal pricing and inventory policy with order cancelations under the cash-on-delivery payment scheme

Considering a periodic review system where the online seller allows the customers to pay when the products are delivered to them（referred as cash-on-delivery payment scheme in this paper）,the authors investigate the seller＇s joint pricing and inventory control policy with a finite planning horizon.In particular,the authors incorporate the customers＇ possible order cancellation behavior with the cash-on-delivery scheme.It can be proven that the base-stock list price policy is optimal under mild conditions.The authors also analyze the impact of the customers＇ forward looking behavior on the optimal policy.     

季铵盐胶束的制备及其抗菌性能研究

为了研究季铵盐胶束是以胶束的形式抗菌还是以胶束解体后的单体形式与细胞膜结合达到抗菌效果,制备了一种季铵盐表面活性剂,该表面活性剂可以自组装成非交联胶束,还可以通过含有酯键的交联剂获得表面交联胶束.交联胶束在脂肪酶的作用下能解交联形成解交联胶束.利用核磁共振氢谱和动态光散射对合成的表面活性剂进行了分析,通过最低抑菌浓度和透射电子显微镜探讨了胶束的抗菌性能.     

组稿中需要注意和具备的几个问题与能力

组稿是策划编辑的一项重要工作,对选题的落实质量起着重要的影响作用.在组稿过程中需要注意什么问题,以及在组稿工作中需要编辑具备什么能力?本文对此作了简要的论述.     

枯草杆菌JAS株α—淀粉酶的产生与其抗衣霉素的关系

为了研究Bacillus subtilis的产α-淀粉酶性状与其抗衣霉素性状之间的关系,进一步选择在诱变育种时能有效地筛选淀粉酶基因突变株的方法,我们对此作了初步探索.衣霉素敏感型的α-淀粉酶工业生产菌B.subtilis JAS经过紫外线诱变后,选得9株抗衣霉素突变株.通过对它们进行的多次发酵酶活力测定,发现其中3株是α-淀粉酶缺陷型、3株酶活力基本不变或降低,另外3株酶活力明显提高,其中1株酶活力是出发菌株的114%—123%.试验表明B.subtilis α-淀粉酶的产生与其抗衣霉素基因的表达有着密切关系.因此,在对该菌的诱变育种时,可以采用衣霉素为粗筛选择压力.     

用激波管测量固体介质中的空间电荷分布

本文分析了压力阶跃波法测量固体介质中空间电荷分布的基本原理,讨论了激波在气体激波管内的传播及气体激波作用于固体时在固体内引起的波动的过程。用直径为113mm的激波管为主体构成了空间电荷测量系统,并用压力传感器和微型计算机构成了激波波速测量装置,从而较准确地获得了激波波速、激波压力阶跃波形等有关参数。并得到了一些空间电荷的测量结果。