城市设计导则可控体系的理性建构

城市设计导则是城市设计体系中针对如何实现空间环境设计的具体指引和控制框架,是一种由设计性语言转译而来的管理性语言。随着现代城市发展内容的不断深入和复杂化,在城市设计体系不够完善,其地位、作用尚不明朗的前提下,导则设计更应超越可变性内容的限定,转而提供一种"理性"的控制框架,限定出城市建设及其管理的可变性范围,为后续的设计与建设创造更多的可能性。本文以广州大学城中心区城市设计导则、佛山市中心组团新城区城市设计导则为例研究,尝试建构一种理性的可控框架,提出将城市设计导则体系中的可控因素进行针对项目的重要性排序、明确导控类型、并形成引导城市建设的有效管理工具和综合作用力的方法。

基于含咪唑衍生物的逻辑门可控体系的研究

设计基于化合物1-(2-(4-(4-(4,5-二苯基-1H-咪唑-2-)苯基)哌嗪-1-乙氧基)乙基)-4-(4,5-二苯基-1H-咪唑-2-苯基)哌嗪(EDIPP)上的多信号交流的分子开关,化合物EDIPP对酸、金属离子敏感,特别对锌离子有特殊的选择性.该化合物的荧光强度和发射波长也能随酸、金属离子的调节而发生相应变化.在此基础上,实现2个输出信号响应2个输入信号的复杂分子开关.

流通食品安全可控体系操作模式的初步构想

工商部门如何能够更加有效地保证食品在流通过程中的品质和安全,提出流通食品安全可控体系的概念,阐述其意义并对如何操作实施该体系提出初步构想,以期能够为保障流通环节食品安全提供有效的途径和方法。

可控型法学实践教学体系探索

随着我国法学高等教学改革的不断推进,实践教学取得了不错的教改效果。在巩固现有成绩的前提下,进一步强化实践教学效果、促进优质法律职业资源与教学资源的整合是亟待解决的问题。吉林大学法学院通过模拟法庭课程化教学、法律精英人才实验班、法律援助站三个项目的建设,在持续性的教学过程中积极探索可控型法学实践教学体系的样态与路向。

治疗勃起功能障碍的高分子/基因复合药物控释体系建立与性能研究

目的:针对ED治疗方法的不足,设计和制备新型高效的高分子/基因复合药物控释体系,探讨pH、温度双敏感水凝胶体系在ED基因治疗中的可行性。方法:对聚赖氨酸/小干扰RNA(PLL/siRNA)基因复合物进行Zeta电位表征,制备最佳的siRNA基因纳米颗粒;以聚乙二醇-聚丙二醇-聚乙二醇嵌段共聚物(PEO-PPOPEO)为交联单元,通过化学改性在其两端引入苯甲醛基团,使其与壳聚糖反应形成苯甲酰亚胺键,从而制备pH、温度双敏感可注射基因药物控释体系,并对不同温度下控释体系的释放情况进行检测。结果:当PLL∶siRNA质量比为20∶1时,复合物的Zeta电势达到最大正值(+23.5 mV),siRNA被PLL最大程度的包裹;将环境pH由酸性(5.5)调至中性(7.4),壳聚糖和交联剂发生Schiff反应而交联,形成水凝胶;体系内包覆的siRNA在37℃时保持低释放,升高温度至60℃后释放量大幅增加,至1 000 min时,60℃条件下的累计释放量为(122.5±5.3)μg,而37℃下仅为(23.8±6.0)μg(P<0.05)。结论:成功制备高分子/基因复合药物控释体系,在保证基因药物高靶向性的同时,提高了基因载体的稳定性和容量,并实现siRNA的温控释放,将有望成为ED基因药物治疗中的新材料,为简捷方便的按需给药提供新手段。

基于互联网的可控业务网体系架构

为了使网络对业务具感知和控制能力,提出了一种基于互联网的可控业务网体系架构——INACOS(Internet based net-work architecture with controllable service)。该架构在现有的互联网承载层之上应用层之下增加一个业务垫层,实现对电信业务共性功能的支持、控制和管理。通过INACOS,可以在不改动互联网承载设备和协议的情况下,为网络增加对业务的感知和控制能力,从而为用户业务提供较好的服务质量和较高的安全性。最后,通过一个INACOS原型系统,表明了该架构的可行性。

低初黏可控凝胶调剖体系作用机理及性能研究

为了满足聚驱后油藏深部调堵的要求,进一步提高原油采收率,研发了一种以聚丙烯酰胺、金属离子交联剂、调节剂、增强剂、缓凝剂组合成的低初黏可控凝胶调剖体系,采用岩心渗流实验与仪器测试相结合的方法,对其作用机理及体系性能进行了研究。结果表明:通过优化组分配方,低初黏可控凝胶调剖体系初始黏度在10 mPa·s以内,成胶时间在10~40 d内可控,体系成胶后黏度在2 000 mPa·s以上;适用pH范围为8~9;在强碱溶液中黏度保留率更高;矿化度为40 000 mg/L时,体系黏度仍达到2 000 mPa·s以上;溶液放置60 d以上黏度保留率为80.53%;在混调器转速达到6 000 r/min剪切情况下凝胶黏度保留率为56.50%,经过4次岩心剪切后凝胶黏度保留率为82.56%,抗剪切性能较好;体系中聚合物浓度越高,体系形变恢复能力越强;在多孔介质中经多次冲刷后压力有恢复性上升,耐冲刷性优于常规凝胶;凝胶具有较好的封堵性能,针对有效渗透率为0.4~4μm^(2)的岩心封堵率均在99%以上,残余阻力系数为96.75~550.91。

介孔硅基活性氧可控释放纳米体系及其抗肿瘤应用进展

目前,人类在抗肿瘤治疗方面已取得巨大进步,分子靶向药物、单克隆抗体等一系列抗肿瘤新药层出不穷,已使得广大肿瘤患者不同程度地获益;但现阶段临床抗肿瘤治疗均存在不良反应明显、肿瘤耐药等诸多难题。近年来,以介孔氧化硅为载体设计的纳米药物缓控释体系在一定程度上克服了传统抗肿瘤治疗的种种缺点,尤其是介孔硅基活性氧可控释放纳米体系,具有良好的肿瘤靶向性及生物相容性,且对正常组织细胞影响极小,并可经由多种途径发挥显著的抗肿瘤作用,临床应用前景广阔。该文就该体系及其在抗肿瘤方面的应用进展作一综述。

基于互联网的可控业务网体系架构

为了加强网络对业务的感知能力和控制能力,一种依据互联网的可控业务网体系架构(INACOS)诞生了,这种架构在现有互联网应用层与承载层之间多增加了一个业务垫层,从而对电信业务共性功能进行控制与管理。在这种架构下,可以在不改变承载设备以及协议的同时,增加网络对业务的感知以及控制能力,从而可以提供更好的服务,提升安全系数。

可信可控网络中的QoS资源控制模型

基于前期工作——可信可控网络体系结构TCNA(trustworthy and controllable network architecture),提出了一种QoS资源控制模型(resource control model for QoS,简称RCMQ).该模型从网络可控角度将QoS控制分为4层:QoS决策层面、QoS观测层面、QoS接口层面和QoS资源层面,模型部署包括独立集中的域内控制和一致性分布式控制.RCMQ模型闭环控制结构保证了QoS控制的有效性,而独立集中的QoS决策层面使得模型具有可扩展性.最后,通过仿真实验验证了RCMQ资源控制模型与InterServ模型相比,能够提供更为稳定的QoS传输,并且极大地减少了QoS状态维护,同时也从侧面说明可信可控网络体系比传统TCP/IP网络具有更高的可控性.

超细粉末湿法制备工艺的粒子粒度和形貌控制

首次明确地把现行湿法制粉工艺中的粒度和形貌的控制思路归纳为设计可控缓释沉淀体系或设计可控沉淀反应器两种。通过大量实例介绍了这两种控制思路的特点以及设计方法,其中可控缓释沉淀体系设计的典型方法有均匀沉淀法、相转变法、模板控制生长法等,主要适合于慢速沉淀反应;可控沉淀反应器设计的典型装置有可控并流沉淀釜式反应器、超重力沉淀反应器和隔断沉淀微流管式反应器等,主要适合于快速沉淀反应。这些特殊体系和反应器的设计为实现超细粉末制备过程中更精细、更强有力的调控,从而制备出质量更优、性能更好的粉末提供了重要的指导。

重视人力资源 推动境外投资——大连市外商投资企业劳动力成本调查

本文围绕改善大连市投资环境,调查和分析了大连市外商投资企业劳动力成本现状,就建立大连市外商投资企业劳动力成本可控体系提出了相应的建议。

The Implementation of Decision Support System for Realizing Effective Usability of CNC Operator Knowledge Capturing System

This article describes experimental evaluations of the authors＇ previous studies on the knowledge-based system （KBS） aimed at capturing and managing CNC （Computer Numerical Control） operator knowledge. The proposed KBS follow thinking steps of CNC operators when they assess machining parameters described in the CAM （Computer Aided Manufacturing） file before proceeding to CNC machining processes. Also, the decision support system equipped with expert system （ES） has been proposed to realize efficient knowledge capturing system and effective usability of captured knowledge, and to recommend actions and decisions. From the viewpoint of providing useful information, the KBS should be aware of context or constraints in which the user has to deal with. In this study, the usefulness of DSS （Decision Support System） and ES is experimentally evaluated using real cases. Comparing the results of the testing participants with and without the DSS and ES, the effectiveness and usefulness were demonstrated. In addition, it was shown that the proposed system is also useful to narrow the discrepancies between CAM and CNC operators, focusing on CNC milling operations.

上海住宅可控遮阳设计的节能分析

21世纪的住宅将十分注重居住环境的合理性与舒适性,居室内的温度稳定、采光和空气品质良好成为人们最基本的生存需要。然而,由于城市建筑、人口的高度集中、大气污染加剧,上海正面临着冬寒夏热的极端性气候威胁。再者,城市老年化进程提高了住宅对阳光的需要,窗面积日益增大的趋势给冬季采暖带来了收益,但却违背了上海地区夏季极端炎热的气候特征。

Controllability analysis of second-order multi-agent systems with directed and weighted interconnection

This article investigates the controllability problem of multi-agent systems. Each agent is assumed to be governed by a second-order consensus control law corresponding to a directed and weighted graph. Two types of topology are considered. The first is concerned with directed trees, which represent the class of topology with minimum information exchange among all controllable topologies. A very simple necessary and sufficient condition regarding the weighting scheme is obtained for the controllability of double integrator multi-agent systems in this scenario. The second is concerned with a more general graph that can be reduced to a directed tree by contracting a cluster of nodes to a component. A similar necessary and sufficient condition is derived. Finally, several illustrative examples are provided to demonstrate the theoretical analysis results.

Simulation of higher-order topological phases and related topological phase transitions in a superconducting qubit

Higher-order topological phases give rise to new bulk and boundary physics,as well as new classes of topological phase transitions.While the realization of higher-order topological phases has been confirmed in many platforms by detecting the existence of gapless boundary modes,a direct determination of the higher-order topology and related topological phase transitions through the bulk in experiments has still been lacking.To bridge the gap,in this work we carry out the simulation of a twodimensional second-order topological phase in a superconducting qubit.Owing to the great flexibility and controllability of the quantum simulator,we observe the realization of higher-order topology directly through the measurement of the pseudo-spin texture in momentum space of the bulk for the first time,in sharp contrast to previous experiments based on the detection of gapless boundary modes in real space.Also through the measurement of the evolution of pseudo-spin texture with parameters,we further observe novel topological phase transitions from the second-order topological phase to the trivial phase,as well as to the first-order topological phase with nonzero Chern number.Our work sheds new light on the study of higher-order topological phases and topological phase transitions.

Controllability of Discrete-Time Multi-Agent Systems with Multiple Leaders on Fixed Networks

This paper investigates controllability of discrete-time multi-agent systems with multiple leaders on fixed networks. The leaders are particular agents playing a part in external inputs to steer other member agents. The followers can arrive at any predetermined configuration by regulating the behaviors of the leaders. Some sufficient and necessary conditions are proposed for the controllability of discrete-time multi-agent systems with multiple leaders. Moreover, the case with isolated agents is discussed. Numerical examples and simulations are proposed to illustrate the theoretical results we established.

Dynamic metal patterns of wrinkles based on photosensitive layers

Regulating metal surfaces with micro-/nanoscale structures is of great significance for both material science and potential applications.However,the intrinsic properties of metals,such as fixed isotropic moduli and inflexible structures,in a sense present major limitations in developing next-generation smart patterned surfaces.In this work,a facile and general patterning strategy is proposed to endow insensitive metal surfaces with controllable spontaneous topologies and dynamic performance by exquisitely introducing an essential photosensitive interlayer.The arresting anthracene-containing photocrosslinking interlayer can selectively predetermine the anisotropic property of compliant bilayers without damaging metals’homogeneous properties,and realize a changeable stiff/soft layer.Furthermore,the mechanical transition mechanism of the self-adaptive wrinkling modes in metalbased trilayer systems is revealed to pave the pathway for regulating functional wrinkled metal surfaces.This photodriven metal patterning strategy can promote the development of brand-new methods for tuning the instability of multilayered materials,and be potentially applied in smart optical devices with dynamic reflectance,including light gratings and"magic"mirrors.

NECESSARY AND SUFFICIENT CONDITION FOR GLOBAL CONTROLLABILITY OF A CLASS OF AFFINE NONLINEAR SYSTEMS

In this paper, we investigate the global controllability of a class of n-dimensional affine nonlinear systems with n- 1 controls and constant control matrix. A necessary and sufficient condition for its global controllability has been obtained by using the methods recently developed. Furthermore, we generalize the above result to a class of affine nonlinear systems with a block-triangular-like structure. Finally, we will give three examples to show the applications of our results.

基于可变成本的火力发电机组动态利润模型

提高机组营收的利润水平,是提升火力发电企业竞争力的有效举措。由于可变要素多,可变成本在火力发电企业总成本中比重较大,且与机组营收利润水平呈现较强的相关性,提出一种基于可变成本的发电机组动态利润模型,即"关键要素—成本—利润"模型。考虑单位时间内关键要素,包括煤、油、水、电等消耗性指标,推导各自的动态计算方法,形成初步的发电企业供电利润模型;基于动态机制的分析,构建动态寻优模型,将当前单位时间内的机组利润值与比较利润进行对比,不断对利润值进行寻优,构建机组可控指标体系。模型实现了动态性和高效性,为机组运行优化和提高利润水平提供了定量的指导依据。